A power AMI system SIM and eSIM intelligent switching method and system

Abstract

The application discloses a kind of electric power AMI system SIM and eSIM Intelligent switching method, comprising the following steps: the software control intelligent switching instruction of configuration circuit;Remote issue eSIM New number QR code and APN3, judge whether current communication module uses SIM card or eSIM;Communication module parses and saves eSIM New number QR code and APN3, starts eSIM switching flag and executes eSIM switching, whether communication module is judged to be successfully networked;Start the profile download of eSIM New number, save the current profile ICCID list of communication module;If eSIM New number profile download is successful, then check whether there is ICCID number increase in current profile ICCID list and last ICCID list;If yes, then profile ICCID list check comparison is successful, set switching success flag, report eSIM switching success, activate downloaded new number profile, restart communication module and use eSIM new number to network, to complete SIM and eSIM Intelligent switching.The application solves the technical problem of how to realize ordinary physical SIM card and eSIM card intelligent switching.

Description

Technical Field

[0001] The present invention relates to the technical field of AMI systems, and in particular to a method and system for intelligent switching between a SIM and an eSIM in an electric power AMI system. Background Art

[0002] With the gradual reduction of telecom operating rates, 3G / 4G / 5G public network communication technologies are increasingly being used in power AMI systems. Currently, the public network modules in smart meters in most power AMI systems use standard plug-in physical SIM cards. These plug-in physical SIM cards have a significant drawback: when power companies want to switch telecom operators to those with lower rates, they need to send personnel to the smart meter installation site to replace the physical SIM card in the public network communication module. This operation is extremely inconvenient for power companies and increases the labor costs of switching operators. In recent years, with technological advances, the electronic SIM (eSIM) has gradually emerged as a new cardless model. The concept of the eSIM card is to embed the traditional SIM card directly into the device chip, rather than configuring it as a separate device. This approach not only allows users to more flexibly choose carrier plans and switch carriers at any time without being restricted by network standards, but also saves the cost of SIM card production and is more reliable than traditional physical SIM cards.

[0003] As eSIM card technology is increasingly used in consumer products such as smartphones, tablets, and smart wearable devices, power companies in various countries around the world are gradually requiring the public network modules on smart meters in power AMI systems to have eSIM functions. Patent document No. 202311219835.1 discloses an automatic switching system between eSIM and SIM based on single-chip microcomputer control. At present, the public network communication modules (2G / 3G / 4G LTE) of smart meters in power AMI systems generally cannot support ordinary SIM cards and eSIMs at the same time, and cannot achieve intelligent switching from ordinary physical SIM cards to eSIMs. For power companies to use eSIM technology, they generally need local telecom operators to build SM-DP+ servers. After the telecom operator servers are built, they can use the eSIM card module to use eSIM technology. Therefore, traditional solutions have great limitations. It is urgent to propose a method and system for intelligent switching between SIM and eSIM in power AMI systems to solve the technical problem of how to achieve intelligent switching between ordinary physical SIM cards and eSIM cards. Summary of the Invention

[0004] The main purpose of the present application is to provide a power AMI system SIM and eSIM intelligent switching method and system, aiming at solving the technical problem of how to realize the intelligent switching of ordinary physical SIM card and eSIM card.

[0005] To achieve the above purpose, the present application provides a power AMI system SIM and eSIM intelligent switching method, wherein the power AMI system SIM and eSIM intelligent switching method comprises the following steps:

[0006] S1, configure the software control intelligent switching instruction of the circuit;

[0007] S2, remotely issue the new number QR code and APN3 of eSIM, and judge whether the current communication module uses SIM card or eSIM;

[0008] If the current communication module uses SIM card, step S3 is executed;

[0009] If the current communication module uses eSIM card, step S4 is executed;

[0010] S3, the communication module parses and saves the new number QR code and APN3 of eSIM, starts the eSIM switching flag to execute eSIM switching, and judges whether the communication module is successfully connected to the network;

[0011] S4, start the profile download of the new number of eSIM, and save the current profile ICCID list of the communication module;

[0012] S5, if the profile download of the new number of eSIM is successful, check whether there is ICCID number increase in the current profile ICCID list and the last ICCID list;

[0013] If yes, the profile ICCID list checking and comparison is successful, the switching success flag is set, the eSIM switching success is reported, the downloaded new number profile is activated, the communication module is restarted to use the new number of eSIM to connect to the network, so as to complete the intelligent switching of SIM and eSIM.

[0014] In one of the preferred schemes, the software control intelligent switching instruction of the circuit in step S1 is specifically:

[0015] Define AT+SIMSEL command;

[0016] If AT+SIMSEL=1, the communication module is switched to SIM;

[0017] If AT+SIMSEL=0, the communication module is switched to eSIM.

[0018] In one of the preferred schemes, the step S2 further comprises:

[0019] Preset the eSIM seed number APN1.

[0020] In one preferred solution, step S3 is specifically as follows:

[0021] After receiving the new eSIM number QR code and APN3, the communication module parses the SM-DP server address in the QR code and saves the APN3.

[0022] Set the eSIM switch start flag to 1 and execute the AT+SIMSEL=0 command to automatically switch to eSIM.

[0023] Configure the communication module to access the network according to APN1 and determine whether the communication module is connected to the network;

[0024] If yes, proceed to step S4;

[0025] If not, the eSIM switching flag is set to 0, the communication module restarts and switches back to the SIM network, and reports the failure of the eSIM new number switch.

[0026] In one of the preferred solutions, if the download of the configuration file of the new eSIM number initiated in step S4 fails, the eSIM switching flag is set to 0, the communication module is restarted to switch back to the SIM network, and the failure of the eSIM new number switching is reported.

[0027] In one preferred solution, if the configuration file of the new eSIM number fails to be downloaded in step S5, the eSIM switching flag is set to 0, the communication module is restarted to switch back to the SIM network, and the failure of the eSIM new number switching is reported.

[0028] The present invention provides an electric power AMI system SIM and eSIM intelligent switching system, wherein the electric power AMI system SIM and eSIM intelligent switching system includes:

[0029] Communication module, switch selection circuit, SIM circuit and eSIM circuit;

[0030] The communication module is electrically connected to the switch selection circuit via a wire, and the switch selection circuit is electrically connected to the SIM circuit and the eSIM circuit respectively via wires.

[0031] In one preferred embodiment, the switch selection circuit includes a switch selection chip U3;

[0032] Pins 1, 2, 3, and 4 of the switch selection chip U3 are connected to the communication module;

[0033] Pins 5, 6, 7, and 8 of the switch selection chip U3 are connected to the eSIM circuit;

[0034] Pins 9, 10, 11, and 12 of the switch selection chip U3 are connected to the SIM circuit;

[0035] Pin 13 of the switch selection chip U3 is connected to the ground terminal and the capacitor C51 respectively, and the other end of the capacitor C51 is connected to the power supply terminal and pin 14 of the switch selection chip U3 respectively;

[0036] Pin 15 of the switch selection chip U3 is respectively connected to the capacitor C52, the resistor R58 and the collector of the transistor Q14, and the base of the transistor Q14 is respectively connected to the capacitor C50, the resistor R67 and the resistor R69; the emitter of the transistor Q14 is respectively connected to the other end of the resistor R69 and the communication module; the other ends of the capacitor C51 and the capacitor C50 are grounded, and the other ends of the resistor R58 and the resistor R67 are connected to the power supply end.

[0037] In one preferred solution, the SIM circuit includes a SIM card holder USIM1;

[0038] Pin 1 of the SIM card holder USIM1 is respectively connected to the capacitor C16, the bidirectional voltage regulator T2, the resistor R32 and the switch selection circuit; pin 2 of the SIM card holder USIM1 is respectively connected to the bidirectional voltage regulator T3, the capacitor C2 and the switch selection circuit; pin 3 of the SIM card holder USIM1 is respectively connected to the bidirectional voltage regulator T4, the capacitor C3 and the switch selection circuit; pin 6 of the SIM card holder USIM1 is respectively connected to the bidirectional voltage regulator T5, the other end of the resistor R32, the capacitor C4 and the switch selection circuit; pin 4 of the SIM card holder USIM1, the capacitor C16, the capacitor C2, the capacitor C3, the capacitor C4, the bidirectional voltage regulator T2, the bidirectional voltage regulator T3, the bidirectional voltage regulator T4 and the other end of the bidirectional voltage regulator T5 are grounded.

[0039] In one preferred embodiment, the eSIM circuit includes an ESIM1 chip;

[0040] Pin 3 of the ESIM1 chip is connected to capacitor C53, resistor R65, and resistor R72 respectively;

[0041] Pin 6 of the ESIM1 chip is connected to capacitor C54 and resistor R71 respectively;

[0042] Pin 7 of the ESIM1 chip is connected to capacitor C55 and resistor R70 respectively;

[0043] Pin 8 of the ESIM1 chip is respectively connected to capacitor C56, the other end of resistor R65, and the switch selection circuit; the other ends of resistors R70, R71, and R72 are all connected to the switch selection circuit; pin 1 of the ESIM1 chip, the other ends of capacitors C53, C54, C55, and C56 are grounded.

[0044] In the above technical solution of the present invention, the electric power AMI system SIM and eSIM intelligent switching method includes the following steps: S1, configuring the circuit software to control the intelligent switching instruction; S2, remotely issuing the eSIM's new number QR code and APN3, and judging whether the current communication module uses a SIM card or an eSIM; if the current communication module uses a SIM card, executing step S3; if the current communication module uses an eSIM card, executing step S4; S3, the communication module parses and saves the eSIM's new number QR code and APN3, starts the eSIM switching flag to execute the eSIM switching, and judges whether the communication module uses a SIM card or an eSIM. Whether the group has successfully joined the network; S4, start the download of the configuration file of the new eSIM number, and save the current configuration file ICCID list of the communication module; S5, if the configuration file of the new eSIM number is successfully downloaded, then check and compare whether there is an ICCID number added in the current configuration file ICCID list and the previous ICCID list; if so, the configuration file ICCID list verification and comparison is successful, set the switching success flag, and report the success of the eSIM switching, activate the downloaded new number configuration file, restart the communication module to use the new eSIM number to join the network, thereby completing the intelligent switching between SIM and eSIM. The present invention effectively solves the technical problem that the telecom operator has not built the SM-DP+ server, but requires the public network communication module on the smart meter to have the ability to intelligently switch from an ordinary physical SIM card to an eSIM card at some point in the future without modifying the hardware, thereby seamlessly switching to the latest eSIM technology, eliminating the inconvenience and high labor costs brought by the power company changing telecom operators compared to traditional physical SIM cards. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0046] Figure 1 A schematic diagram of a method for intelligently switching between a SIM and an eSIM in a power AMI system according to an embodiment of the present invention;

[0047] Figure 2This is a schematic diagram of an intelligent switching system between a SIM and an eSIM in an electric power AMI system according to an embodiment of the present invention.

[0048] The realization of the objectives, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0050] Moreover, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0051] See also Figure 1 According to one aspect of the present invention, a method for intelligently switching between a SIM card and an eSIM card in an electric power AMI system is provided. The method comprises the following steps:

[0052] S1, software-controlled intelligent switching instructions for configuration circuits;

[0053] S2: Remotely issue the new eSIM number QR code and APN3, and determine whether the current communication module uses a SIM card or eSIM;

[0054] If the current communication module uses a SIM card, execute step S3;

[0055] If the current communication module uses an eSIM card, execute step S4;

[0056] S3. The communication module parses and saves the new eSIM number QR code and APN3, activates the eSIM switching flag to perform the eSIM switching, and determines whether the communication module has successfully accessed the network.

[0057] S4. Start downloading the configuration file of the new eSIM number and save the ICCID list of the current configuration file of the communication module;

[0058] S5. If the configuration file of the new eSIM number is downloaded successfully, check and compare the ICCID list of the current configuration file with the previous ICCID list to see if there is an additional ICCID number;

[0059] If so, the configuration file ICCID list verification and comparison are successful, the switching success flag is set, and the eSIM switching success is reported. The downloaded new number configuration file is activated, and the communication module is restarted to use the new eSIM number to access the network, thereby completing the intelligent switching between SIM and eSIM.

[0060] Specifically, in this embodiment, the software-controlled intelligent switching instruction of the configuration circuit in step S1 is specifically as follows: defining the AT+SIMSEL command; controlling the pin to output a high level or a low level through the AT+SIMSEL command, driving the switch selection chip physical circuit to select the communication module to be connected to the ordinary SIM or the eSIM; if AT+SIMSEL=1, the communication module I / O port outputs a high level and switches to SIM; if AT+SIMSEL=0, the communication module I / O port outputs a low level and switches to eSIM; the present invention is not specifically limited, and a high level or a low level can be set as needed to control the switching of SIM or eSIM.

[0061] Specifically, in this embodiment, before step S2, it also includes: presetting the seed number APN1 of the eSIM; by presetting the seed number APN1 when the eSIM card leaves the factory, it is ensured that there is an initial traffic number to connect to the SM-DP+ server of the telecom operator when switching from a normal plug-in SIM.

[0062] Specifically, in this embodiment, step S3 is as follows:

[0063] After receiving the new eSIM number QR code and APN3, the communication module parses the SM-DP server address in the QR code and saves the APN3.

[0064] Set the eSIM switch start flag to 1 to execute the eSIM switch; restart the communication module and execute the AT+SIMSEL=0 command. The hardware physical circuit will automatically connect and switch to the eSIM.

[0065] Configure the communication module to access the network according to the seed number APN1 preset in the eSIM, and determine whether the communication module is connected to the network; if so, execute step S4;

[0066] If not, the eSIM switching flag is set to 0, the communication module restarts and switches back to the SIM network, and reports the failure of the eSIM new number switch.

[0067] Specifically, in this embodiment, if the download of the configuration file of the new eSIM number initiated in step S4 fails, the eSIM switching flag is set to 0, the communication module is restarted to switch back to the SIM network, and the failure of the eSIM new number switching is reported.

[0068] Specifically, in this embodiment, if the configuration file of the new eSIM number fails to be downloaded in step S5, the eSIM switching flag is set to 0, the communication module is restarted to switch back to the SIM network, and the failure of the eSIM new number switching is reported.

[0069] Specifically, in this embodiment, if the verification and comparison between the current configuration file ICCID list and the previous ICCID list shows no increase in the ICCID number in step S5, the eSIM switching flag is set to 0, the communication module restarts and switches back to the SIM network, and reports that the eSIM new number switching has failed.

[0070] Specifically, in this embodiment, the process of switching from a common SIM card to an eSIM involves switching multiple sets of APN parameters. Before step S2, the following further includes: defining the data structure of each APN parameter, specifically:

[0071] eSIM seed number APN1: {"name", "username", "password"};

[0072] Common SIM card number APN2: {"name","username","password"};

[0073] eSIM new number APN3: {"name", "username", "password"};

[0074] The management and configuration switching of each APN parameter includes:

[0075] Determine whether to execute the ordinary SIM to eSIM download process. If so, select the eSIM seed number APN1 configuration parameters, and the communication module configures the selected APN1 parameters to access the network;

[0076] If not, it is further determined whether the current SIM card is a common plug-in SIM card. If so, the ANP2 configuration parameters of the common SIM card are selected, and the communication module configures the selected APN2 parameters to access the network.

[0077] If not, select the APN3 configuration parameters for the new eSIM number, and the communication module configures the selected APN3 parameters to access the network.

[0078] See also Figure 2 According to another aspect of the present invention, the present invention provides a power AMI system SIM and eSIM intelligent switching system, wherein the power AMI system SIM and eSIM intelligent switching system includes:

[0079] Communication module, switch selection circuit, SIM circuit and eSIM circuit;

[0080] The communication module is electrically connected with the switch selection circuit through a wire, and the switch selection circuit is electrically connected with the SIM circuit and the eSIM circuit respectively through wires.

[0081] Specifically, in the embodiment, the switch selection circuit comprises a switch selection chip U3.

[0082] The 1, 2, 3 and 4 pins of the switch selection chip U3 are connected with the communication module.

[0083] The 5, 6, 7 and 8 pins of the switch selection chip U3 are connected with the eSIM circuit.

[0084] The 9, 10, 11 and 12 pins of the switch selection chip U3 are connected with the SIM circuit.

[0085] The 13 pin of the switch selection chip U3 is connected with the ground and the capacitor C51 respectively, and the other end of the capacitor C51 is connected with the power supply and the 14 pin of the switch selection chip U3 respectively.

[0086] The 15 pin of the switch selection chip U3 is connected with the capacitor C52, the resistor R58 and the collector of the transistor Q14 respectively, the base of the transistor Q14 is connected with the capacitor C50, the resistor R67 and the resistor R69 respectively, the emitter of the transistor Q14 is connected with the other end of the resistor R69 and the communication module respectively, the other ends of the capacitor C51 and the capacitor C50 are grounded, and the other ends of the resistor R58 and the resistor R67 are connected with the power supply.

[0087] Specifically, in the embodiment, the SIM circuit comprises a SIM card seat USIM1.

[0088] The 1 pin of the SIM card seat USIM1 is connected with the capacitor C16, the bidirectional voltage stabilizing tube T2, the resistor R32 and the switch selection circuit respectively, the 2 pin of the SIM card seat USIM1 is connected with the bidirectional voltage stabilizing tube T3, the capacitor C2 and the switch selection circuit respectively, the 3 pin of the SIM card seat USIM1 is connected with the bidirectional voltage stabilizing tube T4, the capacitor C3 and the switch selection circuit respectively, the 6 pin of the SIM card seat USIM1 is connected with the bidirectional voltage stabilizing tube T5, the other end of the resistor R32, the capacitor C4 and the switch selection circuit respectively, the 4 pin of the SIM card seat USIM1, the other ends of the capacitor C16, the capacitor C2, the capacitor C3, the capacitor C4, the bidirectional voltage stabilizing tube T2, the bidirectional voltage stabilizing tube T3, the bidirectional voltage stabilizing tube T4 and the bidirectional voltage stabilizing tube T5 are grounded.

[0089] Specifically, in the embodiment, the eSIM circuit comprises an ESIM1 chip.

[0090] Pin 3 of the ESIM1 chip is connected to capacitor C53, resistor R65, and resistor R72 respectively;

[0091] Pin 6 of the ESIM1 chip is connected to capacitor C54 and resistor R71 respectively;

[0092] Pin 7 of the ESIM1 chip is connected to capacitor C55 and resistor R70 respectively;

[0093] Pin 8 of the ESIM1 chip is respectively connected to capacitor C56, the other end of resistor R65, and the switch selection circuit; the other ends of resistors R70, R71, and R72 are all connected to the switch selection circuit; pin 1 of the ESIM1 chip, the other ends of capacitors C53, C54, C55, and C56 are grounded.

[0094] In order to facilitate the understanding of the relevant terms of the present invention, an explanation is given here:

[0095] AMI: refers to the advanced metering infrastructure (AMI), which is an important part of the smart grid.

[0096] eSIM: refers to embedded SIM card (Embedded SIM, referred to as eSIM above).

[0097] SM-DP+ server: operator's eSIM subscription management server (SubscriptionManager-DataPreparation+, referred to as SM-DP+).

[0098] QR code: A QR code (Quick Response Code, referred to as QR code for short) that contains the address information of the number acquisition configuration file given by the operator.

[0099] APN: Access Point Name (abbreviated as APN above).

[0100] ICCID: Integrated Circuit Card Identity (ICCID for short).

[0101] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A method for intelligent switching between SIM and eSIM in an electric power AMI system, characterized in that: The following steps are involved: S1, software-controlled intelligent switching instructions for configuration circuits; S2: Remotely issue the new eSIM number QR code and APN3, and determine whether the current communication module uses a SIM card or eSIM; If the current communication module uses a SIM card, execute step S3; If the current communication module uses an eSIM card, execute step S4; S3. The communication module parses and saves the new eSIM number QR code and APN3, activates the eSIM switching flag to perform the eSIM switching, and determines whether the communication module has successfully accessed the network. S4. Start downloading the configuration file of the new eSIM number and save the ICCID list of the current configuration file of the communication module; S5. If the configuration file of the new eSIM number is downloaded successfully, check and compare the ICCID list of the current configuration file with the previous ICCID list to see if there is an additional ICCID number; If so, the configuration file ICCID list verification and comparison are successful, the switching success flag is set, and the eSIM switching success is reported. The downloaded new number configuration file is activated, and the communication module is restarted to use the new eSIM number to access the network, thereby completing the intelligent switching between SIM and eSIM.

2. The method for intelligently switching between a SIM and an eSIM in an electric power AMI system according to claim 1, characterized in that: The software-controlled intelligent switching instructions for configuring the circuit in step S1 are specifically: Define AT+SIMSEL command; If AT+SIMSEL=1, the communication module switches to SIM; If AT+SIMSEL=0, the communication module switches to eSIM.

3. The method for intelligently switching between a SIM and an eSIM in an electric power AMI system according to claim 2, wherein: Before step S2, the method further includes: Preset the eSIM seed number APN1.

4. The method for intelligently switching between a SIM and an eSIM in an electric power AMI system according to claim 3, wherein: The step S3 is specifically as follows: After receiving the new eSIM number QR code and APN3, the communication module parses the SM-DP server address in the QR code and saves the APN3. Set the eSIM switch start flag to 1 and execute the AT+SIMSEL=0 command to automatically switch to eSIM. Configure the communication module to access the network according to APN1 and determine whether the communication module is connected to the network; If yes, proceed to step S4; If not, the eSIM switching flag is set to 0, the communication module restarts and switches back to the SIM network, and reports the failure of the eSIM new number switch.

5. A method for intelligently switching between a SIM and an eSIM in an electric power AMI system according to any one of claims 1 to 4, characterized in that: If the download of the configuration file of the new eSIM number initiated in step S4 fails, the eSIM switching flag is set to 0, the communication module is restarted to switch back to the SIM network, and the failure of the eSIM new number switching is reported.

6. A method for intelligently switching between a SIM and an eSIM in an electric power AMI system according to any one of claims 1 to 4, characterized in that: If the configuration file of the new eSIM number fails to be downloaded in step S5, the eSIM switching flag is set to 0, the communication module is restarted to switch back to the SIM network, and the failure of the eSIM new number switching is reported.

7. An intelligent switching system comprising the method for intelligent switching between a SIM and an eSIM in an electric power AMI system according to any one of claims 1 to 6, characterized in that: include: Communication module, switch selection circuit, SIM circuit and eSIM circuit; The communication module is electrically connected to the switch selection circuit via a wire, and the switch selection circuit is electrically connected to the SIM circuit and the eSIM circuit respectively via wires.

8. The electric power AMI system SIM and eSIM intelligent switching system according to claim 7, characterized in that: The switch selection circuit includes a switch selection chip U3; Pins 1, 2, 3, and 4 of the switch selection chip U3 are connected to the communication module; Pins 5, 6, 7, and 8 of the switch selection chip U3 are connected to the eSIM circuit; Pins 9, 10, 11, and 12 of the switch selection chip U3 are connected to the SIM circuit; Pin 13 of the switch selection chip U3 is connected to the ground terminal and the capacitor C51 respectively, and the other end of the capacitor C51 is connected to the power supply terminal and pin 14 of the switch selection chip U3 respectively; Pin 15 of the switch selection chip U3 is respectively connected to the capacitor C52, the resistor R58 and the collector of the transistor Q14, and the base of the transistor Q14 is respectively connected to the capacitor C50, the resistor R67 and the resistor R69; the emitter of the transistor Q14 is respectively connected to the other end of the resistor R69 and the communication module; the other ends of the capacitor C51 and the capacitor C50 are grounded, and the other ends of the resistor R58 and the resistor R67 are connected to the power supply end.

9. The electric power AMI system SIM and eSIM intelligent switching system according to claim 7, characterized in that: The SIM circuit includes a SIM card holder USIM1; Pin 1 of the SIM card holder USIM1 is respectively connected to the capacitor C16, the bidirectional voltage regulator T2, the resistor R32 and the switch selection circuit; pin 2 of the SIM card holder USIM1 is respectively connected to the bidirectional voltage regulator T3, the capacitor C2 and the switch selection circuit; pin 3 of the SIM card holder USIM1 is respectively connected to the bidirectional voltage regulator T4, the capacitor C3 and the switch selection circuit; pin 6 of the SIM card holder USIM1 is respectively connected to the bidirectional voltage regulator T5, the other end of the resistor R32, the capacitor C4 and the switch selection circuit; pin 4 of the SIM card holder USIM1, the capacitor C16, the capacitor C2, the capacitor C3, the capacitor C4, the bidirectional voltage regulator T2, the bidirectional voltage regulator T3, the bidirectional voltage regulator T4 and the other end of the bidirectional voltage regulator T5 are grounded.

10. The electric power AMI system SIM and eSIM intelligent switching system according to claim 7, characterized in that: The eSIM circuit includes an ESIM1 chip; Pin 3 of the ESIM1 chip is connected to capacitor C53, resistor R65, and resistor R72 respectively; Pin 6 of the ESIM1 chip is connected to capacitor C54 and resistor R71 respectively; Pin 7 of the ESIM1 chip is connected to capacitor C55 and resistor R70 respectively; Pin 8 of the ESIM1 chip is respectively connected to capacitor C56, the other end of resistor R65, and the switch selection circuit; the other ends of resistors R70, R71, and R72 are all connected to the switch selection circuit; pin 1 of the ESIM1 chip, the other ends of capacitors C53, C54, C55, and C56 are grounded.

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