A CPE device supporting multiple types of battery power supply

Abstract

The application discloses a CPE device supporting multiple types of battery power supply, which comprises a shell, a main control module, a communication module, a battery detection module and a power module. The main control module is based on a MIPS computing platform and is integrated with a network interface, an LCD touch human-computer interaction interface and a fixed telephone voice interface; the communication module supports multiple modes; the MCU of the battery detection module identifies the battery through the battery ID after the battery is connected, adopts an open-circuit voltage sampling and constant-current pulse load voltage response curve fitting bottom-up identification mode to determine the battery type for the battery without carrying an ID chip, and issues a control instruction to the power module accordingly; the power module comprises power conversion circuits of multiple topological structures of BUCK, BOOST, FLYBACK and LDO, and starts corresponding circuits to supply power to the main control module and the communication module according to the instruction. The application realizes adaptive identification and power supply of a single CPE device to multiple types of batteries.

Description

Technical Field

[0001] This invention relates to the technical field of mobile communication terminal equipment, and in particular to the technical field of a CPE device that supports multiple types of battery power supply. Background Technology

[0002] With the widespread adoption of 4G / 5G cellular communication technologies, CPE (Customer Premises Equipment) is widely used as an important network access device in home and business network communication and voice call scenarios. In areas with unstable or underdeveloped power supplies, CPE devices are typically equipped with backup batteries to prevent network interruptions caused by power outages. Currently, existing CPE devices generally use rechargeable lithium-ion batteries as the sole backup power source. However, existing technology has the following significant drawbacks: First, it supports only one type of battery. Existing CPE devices only support rechargeable lithium-ion batteries. If a prolonged power outage causes the lithium battery to deplete and power cannot be restored in time, there is no alternative power source available, and the CPE device completely stops working, unable to continue providing network communication and voice call services. Second, lithium batteries have a limited operating temperature range. For safety reasons, in high-temperature or low-temperature environments exceeding the preset operating temperature range, the battery management system of lithium batteries will enter a protection state, prohibiting charging and discharging, causing the CPE device to malfunction in high-temperature or extremely cold regions. Third, transportation costs are high. Due to the safety risks of lithium batteries, such as combustion and explosion, international and domestic transportation of equipment containing lithium batteries is subject to strict regulations, significantly increasing the transportation costs of CPE devices in the production, distribution, and delivery stages. Therefore, there is an urgent need for a CPE device that can support multiple types of battery power and flexibly switch power sources in different environments to overcome the above shortcomings. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art by proposing a CPE device that supports multiple types of battery power supply. This solves the problems that existing CPE devices can only support a single lithium battery and cannot work in power shortage, high and low temperature environments, and are subject to transportation restrictions.

[0004] To achieve the above objectives, this invention proposes a CPE device supporting multiple types of battery power, comprising a housing, and a main control module, a communication module, a battery detection module, and a power supply module disposed within the housing; the main control module is built on a MIPS computing platform and includes a CPU, a network interface, a human-machine interface, and a voice interaction interface; the network interface includes a gigabit RJ45 interface, the human-machine interface includes an LCD touch screen, and the voice interaction interface includes a fixed-line voice interface for connecting to a standard telephone; the communication module includes a cellular communication unit supporting 4G / 5G wide-area cellular communication and a Wi-Fi support unit. The 6 refers to a wireless local area network unit using the 802.11ax protocol and MIMO (Multiple-Input Multiple-Output) protocol. The output of the communication module is connected to the main control module. The battery detection module includes an MCU (Microcontroller Unit), which has a battery ID sampling terminal and a battery voltage sampling terminal. It internally stores the correspondence between battery ID and battery type. The output of the MCU is connected to the control terminal of the power module. The power module includes power conversion circuits with various topologies and a selection switch. The selection switch selects the corresponding power conversion circuit according to the control command received by the control terminal of the power module, and the selected power conversion circuit outputs power to the main control module and the communication module.

[0005] Preferably, the power module includes power conversion circuits with different topologies, including at least a BUCK buck topology power conversion circuit, a BOOST boost topology power conversion circuit, a FLYBACK flyback topology power conversion circuit, and an LDO low-dropout linear regulator circuit. When the control command issued by the battery detection module determines that the connected battery is a high-voltage battery, it activates the BUCK buck topology power conversion circuit; when it determines that the connected battery is a low-voltage battery, it activates the BOOST boost topology power conversion circuit; and when the landline voice interface receives telephone service, it activates the FLYBACK flyback topology power conversion circuit to supply power to the landline voice interface.

[0006] Preferably, the MCU of the battery detection module adopts an ARM architecture and internally stores a battery ID lookup table, which records multiple battery ID values ​​and the battery type corresponding to each ID value. The power module is equipped with a switching circuit, the input of which is connected to the output of the various power conversion circuits with different topologies, and the output of which is connected to the power supply input of the main control module and the communication module. The control terminal of the switching circuit is connected to the output of the MCU. The control command includes battery type information and battery voltage information, and the switching circuit connects the corresponding power conversion circuit according to the control command.

[0007] Preferably, the housing contains at least two independent battery compartments: a lithium battery compartment and a standard battery compartment. The standard battery compartment is configured to hold at least one of alkaline dry cell batteries, nickel-metal hydride batteries, or lead-acid batteries. The battery detection module is coupled to the outputs of the lithium battery compartment and the standard battery compartment via two independent detection channels. The input of the power module is connected to the outputs of both the lithium battery compartment and the standard battery compartment via an ORing circuit, which selects the current power supply under the control of the battery detection module. An energy storage capacitor bank is connected in parallel between the bus of the power module and the output of the ORing circuit. The capacity of the energy storage capacitor bank is configured to maintain the continuous operation of the main control module and the communication module for at least a preset duration during power supply switching.

[0008] Preferably, the battery detection module further includes a temperature sampling unit configured to collect the temperature of the battery inside the lithium battery compartment; the MCU is further configured to: when the temperature collected by the temperature sampling unit exceeds the preset lithium battery operating temperature range, or when the MCU detects that the output voltage of the lithium battery compartment is lower than the lithium battery protection threshold, automatically switch the power supply from the lithium battery compartment to the standard battery compartment through the ORing circuit, and notify the user of the power supply switching event through the human-machine interface.

[0009] Preferably, the power module includes an adjustable constant current load circuit, the control terminal of which is controlled by the MCU, and the loading terminal of which is connected to the node between the positive terminal of the battery and the battery voltage sampling terminal of the MCU. The MCU has a pre-stored characteristic parameter table for various battery chemical systems. The characteristic parameter table stores the open circuit voltage range, voltage drop range, and voltage recovery slope range for each battery chemical system. For batteries without a battery ID chip, the MCU compares the battery open circuit voltage under no-load conditions, the battery voltage drop range during the loading of the adjustable constant current load circuit, and the battery voltage recovery slope after the adjustable constant current load circuit is removed with the characteristic parameter table to determine the chemical system and corresponding battery type of the battery.

[0010] Preferably, the feature parameter table also stores the internal resistance range, discharge cutoff voltage, and temperature compensation coefficient for each battery chemical system; the undervoltage protection judgment threshold of the power module is obtained by correcting the discharge cutoff voltage corresponding to the current battery chemical system according to the temperature compensation coefficient.

[0011] Preferably, the main control module and the battery detection module are connected via an internal communication bus. The main control module is configured to load a corresponding power consumption strategy for the communication module based on the battery type reported by the battery detection module: when the battery type reported by the battery detection module is a rechargeable lithium-ion battery, the main control module controls the communication module to operate at a first power consumption level, in which the cellular communication unit enables 5G NR mode and the wireless local area network unit enables Wi-Fi 6 MIMO multi-spatial stream; when the battery type reported by the battery detection module is a non-rechargeable standard dry cell battery, the main control module controls the communication module to operate at a second power consumption level, in which the cellular communication unit downgrades from 5G NR mode to 4G LTE mode, and the wireless local area network unit disables MIMO multi-spatial stream or disables the Wi-Fi 6 wireless local area network unit; when the battery type reported by the battery detection module is a nickel-metal hydride battery or a lead-acid battery, the main control module controls the communication module to operate at a third power consumption level between the first and second power consumption levels.

[0012] Preferably, the main control module is further configured to perform two-level power reduction within the current power consumption level based on the remaining battery power reported periodically by the battery detection module: when the remaining battery power is lower than a first threshold, the main control module turns off the backlight of the LCD touch screen and puts the human-machine interface into sleep mode; when the remaining battery power is lower than a second threshold of the first threshold, the main control module further turns off the FLYBACK flyback topology power conversion circuit corresponding to the fixed-line voice interface; when the remaining battery power is lower than a third threshold of the second threshold, the main control module only maintains the cellular communication unit in low-power network operation mode.

[0013] Preferably, the fixed-line voice interface is coupled to an off-hook detection circuit, the output of which is connected to the MCU of the battery detection module. The MCU is configured to: issue a command to start the FLYBACK flyback topology power conversion circuit only when the off-hook detection circuit detects an off-hook event and the current bus voltage of the power module is higher than a preset voice service start threshold; and issue a command to shut down the FLYBACK flyback topology power conversion circuit when an on-hook event is triggered or the bus voltage drops to a voice service offload threshold lower than the voice service start threshold.

[0014] Preferably, the cellular communication unit adopts a 5G communication platform supporting the 3GPP R17 standard, which has 5G high-precision positioning capabilities. The main control module is configured to: when the remaining battery power reported by the battery detection module is lower than a preset emergency threshold, enter an emergency positioning beacon mode. In the emergency positioning beacon mode, the main control module shuts down the wireless LAN unit, the LCD touch screen, and the landline voice interface, and only periodically obtains the local location information through the 5G communication platform. It then reports the local location information and the current remaining battery power to a preset server through a low-power signaling channel. Between two consecutive reports, the cellular communication unit enters a sleep state.

[0015] Preferably, after the MCU of the battery detection module is powered on, it identifies the connected battery in the following order: First, it reads the battery ID signal through the ID signal pin. If a valid ID signal is read, it queries the ID-battery type correspondence table pre-stored in the MCU to determine the battery type. Second, if no valid ID signal is read through the ID signal pin, it starts open-circuit voltage sampling and makes a preliminary determination of the chemical system to which the battery belongs based on the range of the open-circuit voltage. Third, it verifies the result of the preliminary determination by sampling the voltage response curve of the battery by applying a constant current load pulse. If the verification is successful, the battery type is confirmed; if the verification fails, the battery type is marked as unknown and the user is prompted through the human-machine interface. Fourth, after confirming the battery type, the MCU looks up the matching power module topology selection parameters according to the battery type in the table and encapsulates the topology selection parameters into a control command and sends it to the power module.

[0016] Preferably, an independent electronic switch is connected in series between the output terminal of the power module and the power supply input of the main control module and the communication module, respectively. The control terminals of the electronic switches are all connected to the MCU of the battery detection module. The MCU is configured such that: before the battery is connected and the battery type identification is completed, the electronic switches remain in the open state; after the battery type identification is completed and the output voltage of the power conversion circuit of the corresponding topology is stable, the MCU closes the electronic switches in sequence according to the order of the main control module first and then the communication module, so as to realize hierarchical power-on timing control.

[0017] Preferably, the method includes the following steps: S1, the MCU of the battery detection module is powered on and started after the battery is connected, and performs battery type identification on the connected battery. The battery type identification includes identification based on the battery ID signal and fallback identification based on the open circuit voltage and constant current load voltage response curve when no valid ID signal is read; S2, the MCU loads the topology selection parameters, discharge cutoff voltage and temperature compensation coefficient corresponding to the battery type from the pre-stored feature parameter table according to the identified battery type; S3, the MCU encapsulates the topology selection parameters into a control command and sends it to the power module. The power module starts the power conversion circuit of the corresponding topology structure to supply power to the main control module and the communication module according to the control command; S4, the main control module... The battery detection module reports the battery type and loads the corresponding communication module power consumption strategy to control the communication module to work at a power consumption level that matches the battery type; S5, the MCU periodically collects the battery terminal voltage, battery temperature, and bus voltage, and triggers power supply switching or load unloading when any of the following conditions are met: the battery temperature exceeds the operating temperature range corresponding to the current battery type; the battery terminal voltage is lower than the discharge cutoff voltage; the bus voltage is lower than the preset voice service unloading threshold; S6, when power supply switching is triggered, the MCU switches the power supply from the current battery compartment to the backup battery compartment through the ORing circuit, and the energy storage capacitor group connected in parallel on the bus side of the power module maintains the continuous operation of the main control module and the communication module during the switching process.

[0018] The beneficial effects of the present invention: The present invention, by setting a battery detection module with battery ID recognition capability and a backup battery identification capability without ID in the CPE device, as well as a power supply module with multiple topologies, enables a single CPE device to automatically identify and adapt to multiple types of batteries, including rechargeable lithium-ion batteries, nickel-metal hydride batteries, alkaline dry batteries and lead-acid batteries, thereby solving many problems caused by the existing CPE devices only supporting a single lithium battery: (1) In the event of a mains power outage and the lithium battery power being depleted, the user can use commercially available standard dry batteries as a substitute power source, enabling the CPE device to quickly resume normal operation; (2) In high-temperature or cold regions, when the lithium battery cannot work due to temperature protection, the CPE device can automatically or manually switch to standard battery power supply to ensure the continuity of network communication and voice call services; (3) Since the CPE device supports multiple types of batteries In the production, circulation and distribution process, the method of transporting without lithium batteries can be selected. After arriving at the place of use, the user can configure locally available batteries, which significantly reduces transportation costs and avoids the inconvenience caused by lithium battery transportation regulations; (4) Through the dual battery compartment ORing switching and energy storage capacitor bus keeping design, the present invention can ensure that the CPE device continues to work online during the switching of power supply and there will be no network interruption; (5) Through the linkage between battery type and communication module power consumption level and secondary power reduction strategy, the present invention can automatically adjust the working mode of communication module according to the current power supply battery capacity, which significantly extends the device's battery life when using low capacity standard batteries; (6) Through the low power emergency positioning beacon mode, the present invention can still periodically report the local location and remaining power information to the preset server when the battery power is critical, which is particularly suitable for field operations, disaster relief and rescue and other application scenarios. Attached Figure Description

[0019] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same features, wherein: Figure 1 This is a hardware system architecture block diagram of the CPE device that supports multiple types of battery power supply according to the present invention; Figure 2 This is a circuit diagram of the battery detection module in the CPE device that supports multiple types of battery power supply according to the present invention. Figure 3 This is a flowchart of the battery detection software in the CPE device of this invention, which supports multiple types of battery power supply.

[0020] The realization of the objective, 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 Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0022] See Figures 1 to 3 This invention discloses a CPE device supporting power supply from multiple types of batteries, comprising a housing, a main control module, a communication module, a battery detection module, and a power supply module disposed within the housing. The housing also includes an independent lithium battery compartment and a standard battery compartment. The lithium battery compartment is used to accommodate rechargeable lithium-ion batteries, and the standard battery compartment is used to accommodate alkaline dry cell batteries, nickel-metal hydride batteries, or lead-acid batteries.

[0023] The main control module is built on the MIPS computing platform and includes a CPU, a network interface, a human-machine interface, and a voice interaction interface. The network interface includes a standard gigabit RJ45 interface. The human-machine interface includes an LCD touchscreen display, allowing users to directly configure and manage the CPE device via touch operation on the LCD touchscreen without the need for a PC or mobile phone. The voice interaction interface includes a landline voice interface for connecting a standard telephone; users can use voice call services by simply plugging their standard telephone into the landline voice interface. The main control module converts the data received by the communication module into standard ISO network protocol data and provides network access to the user.

[0024] The communication module includes a cellular communication unit and a wireless local area network (WLAN) unit. The cellular communication unit supports 4G / 5G wide-area cellular communication. In this embodiment, the cellular communication unit uses the Unisoc V610 5G communication platform. The Unisoc V610 5G communication platform supports the 3GPP R17 standard and the frequency bands of major global operators. It features high speed, low power consumption, low latency, and high reliability, making it particularly suitable for battery-powered scenarios and improving the device's battery life. The Unisoc V610 5G communication platform also supports 5G high-precision positioning, enabling rapid device location via 5G networks in field operations and disaster relief scenarios. The WLAN unit supports Wi-Fi 6 (802.11ax) protocol and MIMO technology, improving network transmission speed and user experience.

[0025] The battery detection module is one of the core components of this invention, including an MCU, an ID signal sampling channel, an open-circuit voltage sampling channel, an adjustable constant current load pulse circuit, a temperature sampling unit, and a power supply switching control interface. In this embodiment, the MCU adopts an ARM architecture. The MCU internally stores a feature parameter table, which, for each battery chemistry system (including rechargeable lithium-ion batteries, nickel-metal hydride batteries, alkaline dry batteries, and lead-acid batteries), stores: the correspondence between battery ID and battery type, nominal open-circuit voltage range, internal resistance range, discharge cutoff voltage, and temperature compensation coefficient.

[0026] The battery detection module is coupled to the outputs of the lithium battery compartment and the standard battery compartment via two independent detection channels. The input of the power module is simultaneously connected to the outputs of the lithium battery compartment and the standard battery compartment via an ORing circuit, which selects the current power supply under the control of the battery detection module. A storage capacitor bank consisting of several supercapacitors or large-capacity electrolytic capacitors is connected in parallel between the bus of the power module and the output of the ORing circuit. The capacity of the storage capacitor bank is configured to maintain the main control module and the communication module in continuous operation for at least 100 milliseconds during power supply switching, ensuring that the CPE device does not disconnect during the switching process.

[0027] The power module includes four different power conversion circuit topologies: BUCK buck topology power conversion circuit, BOOST boost topology power conversion circuit, FLYBACK flyback topology power conversion circuit, and LDO low dropout linear regulator circuit. Independent electronic switches are connected in series between the output terminal of the power module and the power input of the main control module and the communication module, respectively. The control terminals of these electronic switches are all connected to the MCU of the battery detection module.

[0028] This invention supports CPE devices powered by various types of batteries to perform battery identification and power supply control according to the following process during operation: The first step is that the battery detection module's MCU is powered on and started when the battery is connected. The MCU first reads the ID signal of the connected battery through the ID signal pin. If a valid ID signal is read, the MCU queries the ID-battery type correspondence table stored inside the MCU to determine the battery type.

[0029] The second step involves the MCU performing a fallback identification process for batteries without an ID chip, such as alkaline dry cell batteries and ordinary nickel-metal hydride batteries. First, the open-circuit voltage of the battery is collected under no-load conditions. Based on the range of the open-circuit voltage, the chemical system of the battery is preliminarily determined (e.g., an open-circuit voltage of approximately 1.5V / cell typically corresponds to an alkaline dry cell battery, approximately 1.2V / cell typically corresponds to a nickel-metal hydride battery, approximately 3.7V corresponds to a single lithium-ion battery, and approximately 12V corresponds to a lead-acid battery). Then, the adjustable constant-current load pulse circuit in the power module applies a constant-current pulse load with a preset amplitude and duration to the battery. The voltage drop amplitude during the application of the constant-current pulse load and the voltage recovery slope after the constant-current pulse load is removed are collected. The open-circuit voltage, voltage drop amplitude, and voltage recovery slope are compared with the nominal open-circuit voltage range, internal resistance range, and recovery characteristics of each chemical system in the characteristic parameter table to verify the chemical system of the battery. If the verification passes, the battery type is confirmed; if the verification fails, the battery type is marked as unknown and a prompt is displayed to the user via the LCD touch screen.

[0030] Third, after confirming the battery type, the MCU loads the corresponding topology selection parameters, discharge cutoff voltage, and temperature compensation coefficient from the feature parameter table, and encapsulates the topology selection parameters into control commands, which are then sent to the power module. The power module activates the corresponding topology power conversion circuit according to the control commands: for high-voltage batteries (such as multi-cell lithium-ion battery packs or 12V lead-acid batteries) with voltages higher than the main control module's operating voltage, the BUCK buck topology power conversion circuit is activated; for low-voltage batteries (such as single-cell alkaline dry cell battery packs or single-cell nickel-metal hydride battery packs) with voltages lower than the main control module's operating voltage, the BOOST boost topology power conversion circuit is activated; and for cases where a landline voice interface is connected to a telephone service, the FLYBACK flyback topology power conversion circuit is activated as needed to supply power to the landline voice interface.

[0031] Fourth, after the output voltage of the power conversion circuit of the corresponding topology stabilizes, the MCU closes the electronic switch in sequence according to the order of the main control module first and the communication module last, so as to realize the hierarchical power-on timing control and avoid the surge current impact at the moment of power-on.

[0032] Fifth, the main control module receives the battery type reported by the battery detection module through the internal communication bus and loads the corresponding communication module power consumption strategy. When the battery type is a rechargeable lithium-ion battery, the main control module controls the communication module to operate at the first power consumption level, the cellular communication unit enables 5G NR mode and the wireless LAN unit enables Wi-Fi 6 MIMO multi-spatial stream, providing optimal network performance; when the battery type is a non-rechargeable standard dry cell battery, the main control module controls the communication module to operate at the second power consumption level, the cellular communication unit downgrades from 5G NR mode to 4G LTE mode and the wireless LAN unit disables MIMO multi-spatial stream or disables the Wi-Fi 6 wireless LAN unit, thereby significantly reducing the power consumption of the communication module to extend the device's battery life; when the battery type is a nickel-metal hydride battery or a lead-acid battery, the main control module controls the communication module to operate at a third power consumption level, which is between the first and second power consumption levels.

[0033] Step 6: During the operation of the CPE device, the MCU periodically collects the battery terminal voltage, battery temperature, and power module bus voltage. When the lithium battery temperature collected by the temperature sampling unit exceeds the preset lithium battery operating temperature range, or when the MCU detects that the output voltage of the lithium battery compartment is lower than the lithium battery protection threshold, it automatically switches the power supply from the lithium battery compartment to the standard battery compartment through the ORing circuit and notifies the user of the power supply switching event through the LCD touch screen. During the switching, the energy storage capacitor bank maintains the bus voltage to ensure that the device does not disconnect. When the battery terminal voltage is lower than the discharge cutoff voltage corresponding to the current battery type, the MCU performs undervoltage protection. When the off-hook detection circuit of the fixed-line voice interface detects an off-hook event and the bus voltage is higher than the preset voice service start threshold, the MCU issues a command to start the FLYBACK flyback topology power conversion circuit to output power to the fixed-line voice interface. When the phone is hung up or the bus voltage drops to the voice service unloading threshold, the FLYBACK flyback topology power conversion circuit is turned off.

[0034] Step 7: The main control module performs two levels of power reduction within the current power consumption level based on the remaining battery power reported periodically by the battery detection module: When the remaining battery power is below the first threshold, the main control module turns off the backlight of the LCD touch screen and puts the human-machine interface into sleep mode; when the remaining battery power is below the second threshold, it further shuts down the FLYBACK flyback topology power conversion circuit corresponding to the fixed-line voice interface; when the remaining battery power is below the third threshold, it only maintains the cellular communication unit in low-power network operation. When the remaining battery power is below the preset emergency threshold, the main control module enters emergency positioning beacon mode, shuts down the wireless LAN unit, LCD touch screen, and fixed-line voice interface, and only periodically obtains the local location information through the 5G communication platform supporting the 3GPP R17 standard, and reports the local location information and current remaining battery power to the preset server through the low-power signaling channel. Between two adjacent reports, the cellular communication unit enters sleep mode, so that the location and status information of the CPE device can still be transmitted to the outside world even when the power is extremely limited.

[0035] The beneficial effects of this invention supporting CPE devices powered by multiple battery types are as follows: Through the combined design of a battery detection module with battery ID recognition and backup identification capabilities for batteries without ID, and a power module with multiple topologies, a single CPE device can automatically identify and adapt to multiple battery types, overcoming the limitations of existing CPE devices in terms of battery type; through dual-battery compartment ORing switching and energy storage capacitor busbar maintenance design, the CPE device remains online during power supply switching, ensuring uninterrupted network communication services; through the linkage control of battery type and communication module power consumption levels, and multi-level power reduction strategies, the communication module's operating mode is adaptively adjusted according to the current battery capacity, significantly extending the device's battery life under low-capacity battery conditions; through the low-battery emergency positioning beacon mode, the device can still periodically report its location and status information to the outside world even when the battery is critically low, making it particularly suitable for field operations and disaster relief scenarios; furthermore, since the CPE device supports non-lithium battery power, it can be transported without lithium batteries during production, distribution, and delivery, significantly reducing transportation costs and circumventing lithium battery transportation regulations.

[0036] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A CPE device supporting multiple types of battery power supply, characterized in that: It includes a housing, and a main control module, a communication module, a battery detection module, and a power module disposed within the housing; The main control module is built on the MIPS computing platform and includes a CPU, a network interface, a human-computer interaction interface and a voice interaction interface. The network interface includes a gigabit RJ45 interface, the human-computer interaction interface includes an LCD touch screen, and the voice interaction interface includes a landline voice interface for connecting to a standard telephone. The communication module includes a cellular communication unit that supports 4G / 5G wide-area cellular communication and a wireless local area network unit that supports Wi-Fi 6, i.e., the 802.11ax protocol and MIMO multiple input multiple output. The output of the communication module is connected to the main control module. The battery detection module includes an MCU, which has a battery ID sampling terminal and a battery voltage sampling terminal. It internally stores the correspondence between battery ID and battery type. The output terminal of the MCU is connected to the control terminal of the power module. The power module includes power conversion circuits with different topologies and a selection switch. The selection switch selects the power conversion circuit with the corresponding topology according to the control command received by the power module control terminal, and the selected power conversion circuit outputs power to the main control module and the communication module.

2. The CPE device supporting multiple types of battery power as described in claim 1, characterized in that: The power module includes power conversion circuits with different topologies, including at least a BUCK buck topology power conversion circuit, a BOOST boost topology power conversion circuit, a FLYBACK flyback topology power conversion circuit, and an LDO low-dropout linear regulator circuit. When the battery detection module issues a control command, it activates the BUCK buck topology power conversion circuit when the connected battery is determined to be a high-voltage battery; it activates the BOOST boost topology power conversion circuit when the connected battery is determined to be a low-voltage battery; and it activates the FLYBACK flyback topology power conversion circuit to supply power to the fixed-line voice interface when the fixed-line voice interface receives telephone service.

3. A CPE device supporting multiple types of battery power as described in claim 1, characterized in that: The MCU of the battery detection module adopts an ARM architecture and stores a battery ID lookup table internally. The battery ID lookup table records multiple battery ID values ​​and the battery type corresponding to each ID value. The power module includes a switching circuit. The input terminals of the switching circuit are respectively connected to the output terminals of the various power conversion circuits with different topologies. The output terminals of the switching circuit are connected to the power supply inputs of the main control module and the communication module. The control terminal of the switching circuit is connected to the output terminal of the MCU. The control command includes battery type information and battery voltage information. The switching circuit connects the power conversion circuit with the corresponding topology according to the control command.

4. A CPE device supporting multiple types of battery power as described in claim 1, characterized in that: The housing contains at least two independent battery compartments: a lithium battery compartment and a standard battery compartment. The standard battery compartment is configured to hold at least one of alkaline dry cell batteries, nickel-metal hydride batteries, or lead-acid batteries. The battery detection module is coupled to the output terminals of the lithium battery compartment and the standard battery compartment through two independent detection channels. The input terminal of the power module is connected to the output terminals of both the lithium battery compartment and the standard battery compartment through an ORing circuit, which selects the current power supply under the control of the battery detection module. An energy storage capacitor bank is connected in parallel between the bus of the power module and the output terminal of the ORing circuit. The capacity of the energy storage capacitor bank is configured to maintain the main control module and the communication module in continuous operation for no less than a preset duration during power supply switching.

5. A CPE device supporting multiple types of battery power as described in claim 4, characterized in that: The battery detection module also includes a temperature sampling unit, which is configured to collect the temperature of the battery in the lithium battery compartment. The MCU is further configured to automatically switch the power supply from the lithium battery compartment to the standard battery compartment through the ORing circuit when the temperature collected by the temperature sampling unit exceeds the preset lithium battery operating temperature range, or when the MCU detects that the output voltage of the lithium battery compartment is lower than the lithium battery protection threshold, and to notify the user of the power supply switching event through the human-machine interface.

6. A CPE device supporting multiple types of battery power as described in claim 1, characterized in that: The power module includes an adjustable constant current load circuit, whose control terminal is controlled by the MCU, and whose loading terminal is connected to the node between the positive terminal of the battery and the battery voltage sampling terminal of the MCU. The MCU has a pre-stored characteristic parameter table for various battery chemical systems. The characteristic parameter table stores the open circuit voltage range, voltage drop range, and voltage recovery slope range for each battery chemical system. For batteries without a battery ID chip, the MCU compares the battery open circuit voltage under no-load conditions, the battery voltage drop range during the loading of the adjustable constant current load circuit, and the battery voltage recovery slope after the adjustable constant current load circuit is removed with the characteristic parameter table to determine the chemical system and corresponding battery type of the battery.

7. A CPE device supporting multiple types of battery power as described in claim 6, characterized in that: The characteristic parameter table also stores the internal resistance range, discharge cutoff voltage, and temperature compensation coefficient for each battery chemistry system; the undervoltage protection judgment threshold of the power module is obtained by correcting the discharge cutoff voltage corresponding to the current battery chemistry system according to the temperature compensation coefficient.

8. A CPE device supporting multiple types of battery power as described in claim 1, characterized in that: The main control module and the battery detection module are connected via an internal communication bus. The main control module loads a corresponding power consumption strategy based on the battery type reported by the battery detection module: when the reported battery type is a rechargeable lithium-ion battery, the main control module controls the communication module to operate at the first power consumption level, in which the cellular communication unit enables 5G NR mode and the wireless local area network unit enables Wi-Fi 6 MIMO multi-spatial stream; when the reported battery type is a non-rechargeable standard dry cell battery, the main control module controls the communication module to operate at the second power consumption level, in which the cellular communication unit downgrades from 5G NR mode to 4G LTE mode and disables the MIMO multi-spatial stream of the wireless local area network unit, or directly disables the wireless local area network unit; when the reported battery type is a nickel-metal hydride battery or a lead-acid battery, the main control module controls the communication module to operate at a third power consumption level, which is between the first power consumption level and the second power consumption level.

9. A CPE device supporting multiple types of battery power as described in claim 7, characterized in that: The main control module also performs secondary power reduction based on the remaining battery power reported periodically by the battery detection module within the current power consumption level: when the remaining battery power is lower than the first threshold, the main control module turns off the backlight of the LCD touch screen and puts the human-machine interface into sleep mode. When the remaining battery power is lower than the second threshold, the FLYBACK flyback topology power conversion circuit corresponding to the fixed-line voice interface is further shut down; when the remaining battery power is lower than the third threshold, the cellular communication unit is maintained in low-power network state only; wherein the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold.

10. A CPE device supporting multiple types of battery power as described in claim 2, characterized in that: The fixed-line voice interface is coupled to an off-hook detection circuit, the output of which is connected to the MCU of the battery detection module. When the off-hook detection circuit detects an off-hook event and the current bus voltage of the power module is higher than a preset voice service activation threshold, the MCU issues a command to activate the FLYBACK flyback topology power conversion circuit. When an on-hook event is detected or the bus voltage drops below a preset voice service offload threshold, the MCU issues a command to shut down the FLYBACK flyback topology power conversion circuit, where the voice service offload threshold is lower than the voice service activation threshold.

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