Charging electric quantity detection method and continuous blood glucose monitoring equipment

Abstract

The invention relates to a charging electric quantity detection method and continuous blood glucose monitoring equipment, and the method comprises the steps: obtaining a theoretical bias voltage and an actual bias voltage of a working electrode of an electrochemical sensor in the continuous blood glucose monitoring equipment; determining a voltage calibration coefficient according to the theoretical bias voltage and the actual bias voltage; acquiring a voltage value of a battery in the charging process of the continuous blood glucose monitoring equipment; determining a calibration voltage value of the battery according to the voltage calibration coefficient and the voltage value of the battery; and determining the charging electric quantity of the continuous blood glucose monitoring equipment according to the calibration voltage value of the battery.

Description

Technical Field

[0001] The present disclosure relates to charging detection technology, and more particularly, to a charging power detection method and a continuous glucose monitoring device. Background Art

[0002] Continuous Glucose Monitoring (CGM) devices play an important role in the field of medical technology, and they can monitor the blood glucose level of users in real time. Currently, CGM devices use coulomb counter chips to detect the power during the battery charging process, and this technical means increases the product cost. Summary of the Invention

[0003] An object of the present invention is to provide a new technical solution for a charging power detection method.

[0004] According to a first aspect of the present invention, there is provided a charging power detection method applied to a continuous glucose monitoring device, the method comprising:

[0005] obtaining a theoretical bias voltage and an actual bias voltage of a working electrode of an electrochemical sensor in the continuous glucose monitoring device;

[0006] determining a voltage calibration coefficient according to the theoretical bias voltage and the actual bias voltage;

[0007] obtaining a voltage value of a battery during the charging process of the continuous glucose monitoring device;

[0008] determining a calibrated voltage value of the battery according to the voltage calibration coefficient and the voltage value of the battery;

[0009] determining the charging power of the continuous glucose monitoring device according to the calibrated voltage value of the battery.

[0010] Optionally, the determining the charging power of the continuous glucose monitoring device according to the calibrated voltage value of the battery includes:

[0011] determining a charging stage in which the battery is located according to the calibrated voltage value of the battery, wherein the charging stage is one of a trickle charging stage, a constant current charging stage, and a constant voltage charging stage;

[0012] determining a target relationship from a corresponding relationship between voltage and power and a corresponding relationship between charging time and power according to the charging stage in which the battery is located;

[0013] determining the charging power of the continuous glucose monitoring device based on the target relationship.

[0014] Optionally, the determining the charging stage in which the battery is located according to the calibrated voltage value of the battery includes:

[0015] Obtain the voltage range corresponding to the trickle charging stage, the voltage range corresponding to the constant current charging stage, and the voltage range corresponding to the constant voltage charging stage;

[0016] Determine the charging stage of the battery according to the calibrated voltage value of the battery, the voltage range corresponding to the trickle charging stage, the voltage range corresponding to the constant current charging stage, and the voltage range corresponding to the constant voltage charging stage.

[0017] Optionally, the determining the target relationship from the corresponding relationship between voltage and power and the corresponding relationship between charging time and power according to the charging stage of the battery includes:

[0018] When the charging stage of the battery is the trickle charging stage or the constant current charging stage, determine the corresponding relationship between voltage and power as the target relationship;

[0019] When the charging stage of the battery is the constant voltage charging stage, determine the corresponding relationship between charging time and power as the target relationship.

[0020] Optionally, the corresponding relationship between voltage and power includes a first corresponding relationship between voltage and power and a second corresponding relationship between voltage and power, wherein the first corresponding relationship between voltage and power is the corresponding relationship between voltage and power in the trickle charging stage, and the second corresponding relationship between voltage and power is the corresponding relationship between voltage and power in the constant current charging stage.

[0021] Optionally, the continuous blood glucose monitoring device includes an analog switch, and the method further includes:

[0022] Control the analog switch to connect the path between the working electrode of the electrochemical sensor to obtain the actual bias voltage of the working electrode of the electrochemical sensor.

[0023] Optionally, the continuous blood glucose monitoring device includes a charging management unit and an analog switch. The VCC pin of the charging management unit is connected to the battery, the VSYS pin of the charging management unit is connected to one end of a first voltage dividing resistor, the other end of the first voltage dividing resistor is connected to one end of a second voltage dividing resistor, and the other end of the second voltage dividing resistor is grounded. The method further includes:

[0024] Control the analog switch to connect the path between the connection points to obtain the voltage value of the battery during the charging process of the continuous blood glucose monitoring device, wherein the connection point is arranged between the first voltage dividing resistor and the second voltage dividing resistor.

[0025] According to a second aspect of the present invention, there is provided a continuous blood glucose monitoring device, including a control unit, an electrochemical sensor, and a battery, wherein,

[0026] the control unit is configured to obtain the theoretical bias voltage and the actual bias voltage of the working electrode of the electrochemical sensor in the continuous blood glucose monitoring device;

[0027] determine a voltage calibration coefficient according to the theoretical bias voltage and the actual bias voltage;

[0028] obtain the voltage value of the battery during the charging process of the continuous blood glucose monitoring device;

[0029] determine the calibrated voltage value of the battery according to the voltage calibration coefficient and the voltage value of the battery;

[0030] determine the charging power of the continuous blood glucose monitoring device according to the calibrated voltage value of the battery.

[0031] Optionally, the continuous blood glucose monitoring device further includes an analog switch, wherein the control unit is further configured to control the connection between the analog switch and the working electrode of the electrochemical sensor to obtain the actual bias voltage of the working electrode of the electrochemical sensor.

[0032] Optionally, the continuous blood glucose monitoring device further includes a charging management unit and an analog switch. The charging management unit is connected to the control unit. The VCC pin of the charging management unit is connected to the battery. The VSYS pin of the charging management unit is connected to one end of a first voltage dividing resistor. The other end of the first voltage dividing resistor is connected to one end of a second voltage dividing resistor. The other end of the second voltage dividing resistor is grounded, wherein,

[0033] the control unit is further configured to control the analog switch to be connected between the first voltage dividing resistor and the second voltage dividing resistor to obtain the voltage value of the battery during the charging process of the continuous blood glucose monitoring device.

[0034] The charging power detection method provided by the present invention determines a voltage calibration coefficient according to the theoretical bias voltage and the actual bias voltage of the working electrode of the electrochemical sensor, calibrates the voltage value of the battery during the charging process according to the voltage calibration coefficient, and determines the charging power according to the calibrated battery voltage value, so that it is possible to combine the differences of each continuous blood glucose monitoring device itself and the influence on the battery voltage during the charging process, realize the calibration of the voltage of the battery of each continuous blood glucose monitoring device, and then determine the battery power using the calibrated voltage value of the battery, improving the accuracy of power detection.

[0035] Through the following detailed description of the exemplary embodiments of the present specification with reference to the accompanying drawings, the features and advantages of the embodiments of the present specification will become clear. Brief Description of the Drawings

[0036] The drawings incorporated in and forming a part of this specification illustrate embodiments of the specification and, together with the description, serve to explain the principles of the embodiments of the specification.

[0037] Figure 1 is a schematic diagram of a continuous blood glucose monitoring device according to an embodiment of the present invention.

[0038] Figure 2 is a schematic diagram of a continuous blood glucose monitoring device according to an embodiment of the present invention.

[0039] Figure 3 is a schematic diagram of a continuous blood glucose monitoring device according to an embodiment of the present invention.

[0040] Figure 4 is a schematic flowchart of a charging power detection method according to an embodiment of the present invention.

[0041] Figure 5 is a schematic structural diagram of a current change curve and a voltage change curve during charging according to an embodiment of the present invention. Detailed Description of the Embodiments

[0042] Various exemplary embodiments of the present specification will now be described in detail with reference to the drawings.

[0043] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the embodiments of the present specification, their applications, or uses.

[0044] It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0045] In an embodiment of the present invention, a charging power detection method is provided. The method is applied to a continuous blood glucose monitoring device. According to Figure 1 shown, the continuous blood glucose monitoring device includes a control unit, an AFE (Active Front End) unit, and an electrochemical sensor. The control unit is connected to the AFE unit. According to Figure 1 shown, the control unit is connected to the AFE unit through SPI, UART, or IIC.

[0046] The control unit is the arithmetic control unit of the continuous blood glucose monitoring device. The control unit may be an MCU (Microcontroller Unit).

[0047] The AFE unit and the electrochemical sensor have a three - electrode structure, namely, a working electrode (WE), a reference electrode (RE), and an auxiliary electrode (CE). The current generated by the electrochemical reaction in the electrochemical sensor flows out through the working electrode of the electrochemical sensor, passes through the feedback resistor in the AFE unit, and then flows into the electrochemical sensor through the auxiliary electrode. The AFE unit is used to obtain the actual bias voltage of the working electrode as the input - end voltage of the feedback resistor, obtain the output - end voltage of the feedback resistor, and determine the current value generated by the electrochemical reaction in the electrochemical sensor according to the actual bias voltage of the working electrode, the output - end voltage of the feedback resistor, and the resistance value of the feedback resistor, and send the current value to the control unit. The control unit determines the blood - glucose value according to this current value.

[0048] The theoretical bias voltage of the working electrode is a voltage applied to ensure the normal operation of the electrochemical sensor. The actual bias voltage of the working electrode is a voltage actually measured when the electrochemical sensor is working.

[0049] According to Figure 2 As shown, the continuous blood - glucose monitoring device also includes an analog switch. The control unit is also used to control the analog switch to connect the path between the working electrode of the electrochemical sensor to obtain the actual bias voltage of the working electrode of the electrochemical sensor.

[0050] According to Figure 2 As shown, one end of the analog switch is connected to the adc pin of the control unit, and the path between the analog switch and the working electrode of the electrochemical sensor is in a disconnected state. The control unit is used to control the analog switch to connect the path between its B - C to connect the path between the analog switch and the working electrode of the electrochemical sensor, so as to obtain the actual bias voltage of the working electrode of the electrochemical sensor. It should be noted that when the path between the analog switch and the working electrode of the electrochemical sensor is connected, the voltages at the connection point between the analog switch and the working electrode, point B, and point C of the analog switch are equal, which is the actual bias voltage of the working electrode.

[0051] According to Figure 3 As shown, the continuous blood - glucose monitoring device also includes a charging management unit and an analog switch. The charging management unit is connected to the control unit. The VCC pin of the charging management unit is connected to the battery, and the VSYS pin of the charging management unit is connected to one end of the first voltage - dividing resistor R 1 One end of the first voltage - dividing resistor R 1 The other end is connected to one end of the second voltage - dividing resistor R 2 One end of the second voltage - dividing resistor R 2 The other end is grounded.

[0052] The control unit is further configured to control the analog switch to connect the path between the connection point, so as to obtain the voltage value of the battery during the charging process of the continuous blood glucose monitoring device, where the connection point is set between the first voltage dividing resistor and the second voltage dividing resistor.

[0053] According to Figure 3 As shown, the path between the analog switch and the connection point is in an open state. The control unit is configured to control the analog switch to connect the path between its own A-C, so as to connect the path between the analog switch and the connection point, and then obtain the voltage value of the battery during the charging process of the continuous blood glucose monitoring device.

[0054] When controlling the analog switch to connect the path between the connection point, the voltage value obtained by the control unit is the voltage value across the second voltage dividing resistor. According to the resistance value of the first voltage dividing resistor, the resistance value of the second voltage dividing resistor, and the voltage value across the second voltage dividing resistor, the voltage value across the first voltage dividing resistor is calculated, and then the sum of the voltage value across the first voltage dividing resistor and the voltage value across the second voltage dividing resistor is calculated as the voltage value of the battery during the charging process of the continuous blood glucose monitoring device. The voltage value at the VCC pin of the charging management unit is equal to the voltage value at the VSYS pin, both of which are the voltage value of the battery during the charging process of the continuous blood glucose monitoring device.

[0055] It should be noted that Figure 3 The analog switch connected to the working electrode of the electrochemical sensor shown and the analog switch connected to the above connection point are the same analog switch, or can be different analog switches.

[0056] According to Figure 4 As shown, the charging power detection method of this embodiment includes the following steps S410 to S450.

[0057] Step S410, obtaining the theoretical bias voltage and the actual bias voltage of the working electrode of the electrochemical sensor in the continuous blood glucose monitoring device.

[0058] The theoretical bias voltage of the working electrode is a pre-stored value and can be directly obtained.

[0059] In some embodiments, the continuous blood glucose monitoring device includes an analog switch. The method further includes: controlling the analog switch to connect the path between the working electrode of the electrochemical sensor, so as to obtain the actual bias voltage of the working electrode of the electrochemical sensor. For details, see Figure 2 .

[0060] Step S420, determining the voltage calibration coefficient according to the theoretical bias voltage and the actual bias voltage.

[0061] Based on the following calculation formula, the voltage calibration coefficient is calculated.

[0062]

[0063] where α is the voltage calibration coefficient, and V 理论 is the theoretical bias voltage of the working electrode, in V 实际 and V

[0064] Step S430: Obtain the voltage value of the battery during the charging process of the continuous blood glucose monitoring device.

[0065] In some embodiments, the continuous blood glucose monitoring device includes a charging management unit and an analog switch. The VCC pin of the charging management unit is connected to the battery, the VSYS pin of the charging management unit is connected to one end of a first voltage dividing resistor, the other end of the first voltage dividing resistor is connected to one end of a second voltage dividing resistor, and the other end of the second voltage dividing resistor is grounded. The method further includes: controlling the analog switch to connect the path between the connection points to obtain the voltage value of the battery during the charging process of the continuous blood glucose monitoring device, where the connection point is set between the first voltage dividing resistor and the second voltage dividing resistor. For details, see Figure 3 .

[0066] Step S440: Determine the calibrated voltage value of the battery according to the voltage calibration coefficient and the voltage value of the battery.

[0067] Based on the following calculation formula, calculate the calibrated voltage value of the battery,

[0068] V 2 = αV 1

[0069] where α is the voltage calibration coefficient, and V 1 is the voltage value of the battery during the charging process of the continuous blood glucose monitoring device, in V 2 and V

[0070] is the calibrated voltage value of the battery.

[0071] In some embodiments, Step S450 includes Steps S451 to S453.

[0072] Step S451: Determine the charging stage of the battery according to the calibrated voltage value of the battery, where the charging stage is one of the trickle charging stage, the constant current charging stage, and the constant voltage charging stage.

[0073] According to Figure 5 as shown, the battery charging curve is divided into three charging stages, namely the trickle charging stage, the constant current charging stage, and the constant voltage charging stage. Each charging curve includes a current change curve and a voltage change curve during the charging process, where the upper half curve is the current change curve and the lower half curve is the voltage change curve.

[0074] Trickle charging is used to pre - charge or perform restorative charging on a fully discharged battery. According to Figure 3 as shown, the current in trickle charging is small, aiming to safely restore the charging capacity of the battery and avoid damage that may be caused by directly applying a large current when the battery voltage is too low.

[0075] According to Figure 5 as shown, constant - current charging refers to a charging method in which the current remains constant during the charging process. The purpose of the constant - current charging stage is to quickly replenish the battery's power and make the battery voltage rapidly rise close to its rated voltage.

[0076] According to Figure 5 as shown, in the constant - voltage charging stage, the voltage remains almost unchanged while the current gradually decreases. As the battery's charge increases, the chemical reaction in the battery gradually approaches equilibrium, and the required charging current also decreases accordingly. Constant - voltage charging automatically adjusts the charging current according to the change in the state of charge of the battery to ensure full charging of the battery.

[0077] First, obtain the voltage range corresponding to the trickle - charging stage, the voltage range corresponding to the constant - current charging stage, and the voltage range corresponding to the constant - voltage charging stage. Then, based on the calibrated voltage value of the battery, the voltage range corresponding to the trickle - charging stage, the voltage range corresponding to the constant - current charging stage, and the voltage range corresponding to the constant - voltage charging stage, determine the charging stage in which the battery is located.

[0078] In some embodiments, the voltage range corresponding to the trickle - charging stage, the voltage range corresponding to the constant - current charging stage, and the voltage range corresponding to the constant - voltage charging stage are pre - stored. Compare the calibrated voltage value of the battery with the voltage ranges corresponding to each charging stage respectively to determine the voltage range corresponding to the charging stage to which the calibrated voltage value of the battery belongs. Based on the voltage range corresponding to the charging stage to which the calibrated voltage value of the battery belongs, determine the charging stage in which the battery is located. For different models of batteries, the voltage ranges corresponding to the trickle - charging stage, the constant - current charging stage, and the constant - voltage charging stage are different.

[0079] In some embodiments, a first voltage demarcation value and a second voltage demarcation value are pre - stored. The first voltage demarcation value is the voltage demarcation value between the trickle - charging stage and the constant - current charging stage. The second voltage demarcation value is the voltage demarcation value between the constant - current charging stage and the constant - voltage charging stage. First, based on the first voltage demarcation value and the second voltage demarcation value, determine the voltage range corresponding to the trickle - charging stage, the voltage range corresponding to the constant - current charging stage, and the voltage range corresponding to the constant - voltage charging stage. Compare the calibrated voltage value of the battery with the voltage ranges corresponding to each charging stage respectively to determine the voltage range corresponding to the charging stage to which the calibrated voltage value of the battery belongs. Based on the voltage range corresponding to the charging stage to which the calibrated voltage value of the battery belongs, determine the charging stage in which the battery is located. For different models of batteries, the first voltage demarcation value and the second voltage demarcation value are different.

[0080] Step S452: Determine the target relationship from the corresponding relationship between voltage and power and the corresponding relationship between charging time and power according to the charging stage of the battery.

[0081] The corresponding relationship between voltage and power and the corresponding relationship between charging time and power are both pre-stored relationships and can be directly obtained. For different models of batteries, the corresponding relationship between voltage and power and the corresponding relationship between charging time and power are different and can be determined according to the actual data during the battery charging process.

[0082] When the charging stage of the battery is the trickle charging stage or the constant current charging stage, determine that the corresponding relationship between voltage and power is the target relationship. The corresponding relationship between voltage and power includes the first corresponding relationship between voltage and power and the second corresponding relationship between voltage and power. The first corresponding relationship between voltage and power is the corresponding relationship between voltage and power in the trickle charging stage, and the second corresponding relationship between voltage and power is the corresponding relationship between voltage and power in the constant current charging stage.

[0083] When the charging stage of the battery is the constant voltage charging stage, determine that the corresponding relationship between charging time and power is the target relationship.

[0084] Step S453: Determine the charging power of the continuous blood glucose monitoring device based on the target relationship.

[0085] When the charging stage of the battery is the trickle charging stage, determine the charging power of the continuous blood glucose monitoring device according to the calibrated voltage value of the battery and the first corresponding relationship between voltage and power.

[0086] When the charging stage of the battery is the constant current charging stage, determine the charging power of the continuous blood glucose monitoring device according to the calibrated voltage value of the battery and the second corresponding relationship between voltage and power.

[0087] When the charging stage of the battery is the constant current charging stage, obtain the charging time of the battery, and determine the charging power of the continuous blood glucose monitoring device according to the charging time of the battery and the corresponding relationship between charging time and power. The charging time of the battery starts from when the battery enters the constant voltage charging stage.

[0088] The charging power detection method provided by the present invention determines a voltage calibration coefficient based on the theoretical bias voltage and the actual bias voltage of the working electrode of the electrochemical sensor, calibrates the voltage value of the battery during charging according to the voltage calibration coefficient, and determines the charging power according to the calibrated battery voltage value. In this way, it is possible to combine the differences of each continuous glucose monitoring device itself and the influence on the battery voltage during charging, calibrate the voltage of the battery of each continuous glucose monitoring device, and then use the calibrated voltage value of the battery to determine the power of the battery, improving the accuracy of power detection.

[0089] In addition, by setting relationships corresponding to different power levels based on different charging stages, the accuracy of power estimation can be improved, avoiding the jump phenomenon of power display during charging, and ensuring smooth transition and accuracy of power.

[0090] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0091] The above describes specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve the desired result. Additionally, the processes depicted in the figures do not necessarily require the specific order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0092] The embodiments of this specification can be systems, methods, and / or computer program products. The computer program product can include a computer-readable storage medium having computer instructions thereon for causing a processor to implement various aspects of the embodiments of this specification.

[0093] A computer-readable storage medium can be a tangible device that can hold and store computer instructions for use by a computer instruction execution device. A computer-readable storage medium can be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a memory stick, a floppy disk, a mechanically encoded device such as a punch card or raised structures in grooves having computer instructions stored thereon, and any suitable combination of the foregoing. The computer-readable storage medium as used herein is not construed to be a transitory signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., an optical pulse through an optical fiber cable), or an electrical signal transmitted through a wire.

[0094] The computer instructions described herein can be downloaded from the computer-readable storage medium to various computing / processing devices, or downloaded to an external computer or external storage device through a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include a copper transmission cable, an optical fiber transmission, a wireless transmission, a router, a firewall, a switch, a gateway computer, and / or an edge server. A network adapter or network interface in each computing / processing device receives the computer instructions from the network and forwards the computer instructions for storage in the computer-readable storage medium in each computing / processing device.

[0095] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present specification. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a portion of computer instructions, which contain one or more executable computer instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks may occur in a different order than noted in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions. As is well known to those skilled in the art, implementation by hardware, implementation by software, and implementation by a combination of software and hardware are equivalent.

[0096] The embodiments of the present specification have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art in the technical field without departing from the scope of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skilled persons in the technical field to understand the embodiments disclosed herein.

Claims

1. A charging power detection method, characterized in that: Applied to a continuous blood glucose monitoring device, wherein the method comprises: Obtaining a theoretical bias voltage and an actual bias voltage of a working electrode of an electrochemical sensor in the continuous blood glucose monitoring device; Determining a voltage calibration coefficient according to the theoretical bias voltage and the actual bias voltage; Obtaining a voltage value of a battery during charging of the continuous blood glucose monitoring device; Determining a calibration voltage value of the battery according to the voltage calibration coefficient and the voltage value of the battery; The charging capacity of the continuous blood glucose monitoring device is determined according to the calibrated voltage value of the battery.

2. The method according to claim 1, characterized in that Determining the charging capacity of the continuous blood glucose monitoring device according to the calibrated voltage value of the battery includes: Determining the charging stage of the battery according to the calibrated voltage value of the battery, wherein the charging stage is one of a trickle charging stage, a constant current charging stage and a constant voltage charging stage; According to the charging stage of the battery, a target relationship is determined from a corresponding relationship between voltage and power and a corresponding relationship between charging time and power; Based on the target relationship, the charging power of the continuous blood glucose monitoring device is determined.

3. The method according to claim 2, characterized in that Determining the charging stage of the battery according to the calibrated voltage value of the battery includes: Obtaining a voltage range corresponding to the trickle charging stage, a voltage range corresponding to the constant current charging stage, and a voltage range corresponding to the constant voltage charging stage; The charging stage of the battery is determined according to the calibrated voltage value of the battery, the voltage range corresponding to the trickle charging stage, the voltage range corresponding to the constant current charging stage and the voltage range corresponding to the constant voltage charging stage.

4. The method according to claim 2, characterized in that: The determining of the target relationship from the corresponding relationship between voltage and power and the corresponding relationship between charging time and power according to the charging stage of the battery includes: When the charging stage of the battery is a trickle charging stage or a constant current charging stage, determining the corresponding relationship between voltage and power as the target relationship; When the charging stage of the battery is a constant voltage charging stage, the corresponding relationship between the charging time and the electric quantity is determined to be the target relationship.

5. The method according to claim 4, characterized in that The corresponding relationship between voltage and power includes a first corresponding relationship between voltage and power and a second corresponding relationship between voltage and power, wherein the first corresponding relationship between voltage and power is the corresponding relationship between voltage and power corresponding to the trickle charging stage, and the second corresponding relationship between voltage and power is the corresponding relationship between voltage and power corresponding to the constant current charging stage.

6. The method according to claim 1, characterized in that The continuous glucose monitoring device includes an analog switch, wherein the method further includes: The analog switch is controlled to connect a path between the analog switch and the working electrode of the electrochemical sensor to obtain an actual bias voltage of the working electrode of the electrochemical sensor.

7. The method according to claim 1, characterized in that The continuous blood glucose monitoring device comprises a charging management unit and an analog switch, wherein a VCC pin of the charging management unit is connected to the battery, a VSYS pin of the charging management unit is connected to one end of a first voltage-dividing resistor, the other end of the first voltage-dividing resistor is connected to one end of a second voltage-dividing resistor, and the other end of the second voltage-dividing resistor is grounded, wherein the method further comprises: The analog switch is controlled to connect a path to a connection point to obtain a voltage value of a battery during charging of the continuous blood glucose monitoring device, wherein the connection point is arranged between the first voltage-dividing resistor and the second voltage-dividing resistor.

8. A continuous blood glucose monitoring device, characterized in that: It includes a control unit, an electrochemical sensor and a battery, wherein: The control unit is used to obtain a theoretical bias voltage and an actual bias voltage of a working electrode of an electrochemical sensor in the continuous blood glucose monitoring device; Determining a voltage calibration coefficient according to the theoretical bias voltage and the actual bias voltage; Obtaining a voltage value of a battery during charging of the continuous blood glucose monitoring device; Determining a calibration voltage value of the battery according to the voltage calibration coefficient and the voltage value of the battery; The charging capacity of the continuous blood glucose monitoring device is determined according to the calibrated voltage value of the battery.

9. The continuous blood glucose monitoring device according to claim 8, characterized in that: The continuous blood glucose monitoring device also includes an analog switch, wherein the control unit is further used to control the connection of a path between the analog switch and the working electrode of the electrochemical sensor to obtain an actual bias voltage of the working electrode of the electrochemical sensor.

10. The continuous blood glucose monitoring device according to claim 8, characterized in that: The continuous blood glucose monitoring device further includes a charging management unit and an analog switch, wherein the charging management unit is connected to the control unit, a VCC pin of the charging management unit is connected to the battery, a VSYS pin of the charging management unit is connected to one end of a first voltage-dividing resistor, the other end of the first voltage-dividing resistor is connected to one end of a second voltage-dividing resistor, and the other end of the second voltage-dividing resistor is grounded, wherein: The control unit is further used to control the analog switch to be connected between the first voltage-dividing resistor and the second voltage-dividing resistor to obtain the voltage value of the battery during the charging process of the continuous blood glucose monitoring device.

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