1.5 V power supply interphone and power supply system thereof

Abstract

The utility model discloses a 1.5 V power supply interphone and a power supply system thereof, which adopt a 1.5 V battery for power supply and can be called as a minimum power supply scheme, thereby realizing energy conservation and environmental protection. The 1.5 V battery can be supplied with power by a 1.5 V rechargeable battery and can also be supplied with power by a 1.5 V dry battery which is most commonly used in the market, so that the battery is very convenient to purchase and replace, and the minimum use cost is realized. Moreover, a battery type detection contact is ingeniously arranged in the power supply system, and when the mounted battery is detected to be a dry battery, the battery is not charged, so that the use safety of the dry battery is ensured; when it is detected that the installed battery is a rechargeable battery, a charging loop of the rechargeable battery is switched on, and charging of the rechargeable battery is achieved. Moreover, a low-voltage protection unit is also arranged, so that the situation that the power supply output voltage output by the boost converter is too low and is not enough to drive circuits of all parts of the interphone, so that the interphone works abnormally or crashes is avoided.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, specifically to a walkie-talkie powered by 1.5V and its power supply system. Background Technology

[0002] Traditional walkie-talkie power systems typically use 7.4V or 3.7V batteries to ensure sufficient power for all circuitry, such as RF integrated circuits, transmitting circuits, receiving circuits, microprocessors, and audio circuits. These 7.4V or 3.7V power supplies use specialized batteries designed specifically for walkie-talkies, which are only available in certain stores (such as those selling walkie-talkies). In situations requiring immediate battery replacement, it's not readily available to purchase replacement batteries.

[0003] Moreover, for some low-power walkie-talkies (such as those from Japan where the standard requires 1mW to 10mW), a 7.4V or 3.7V power supply is somewhat wasteful and not energy-efficient or environmentally friendly.

[0004] When walkie-talkies need to be miniaturized, the commonly used 1.5V AA batteries on the market can meet all the above requirements. However, using 1.5V power supply requires solving how to ensure the normal operation of various circuit systems of the walkie-talkie under low voltage power supply, such as the transmitting circuit, receiving circuit, and audio circuit. Furthermore, there are two types of common 1.5V AA batteries: rechargeable and non-rechargeable. The two types of batteries have different performance and complex compatibility. For the standard charging function of the walkie-talkie, the battery compatibility problem needs to be solved. Utility Model Content

[0005] The purpose of this utility model is to provide a 1.5V powered walkie-talkie and its power supply system, which can be powered by a conventional 1.5V battery. It is compatible with both rechargeable and non-rechargeable batteries and features convenient battery replacement, energy saving and environmental protection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A power supply system for a 1.5V powered walkie-talkie includes a charging interface, a battery type detection unit, a 1.5V battery, a boost converter, a low-voltage protection unit, and a power switch. The charging interface is connected to the input terminal of the 1.5V battery through the battery type detection unit. The output terminal of the 1.5V battery is connected to the input terminal of the boost converter. The output terminal of the boost converter is connected to the input terminal of the low-voltage protection unit. The output terminal of the low-voltage protection unit is the power supply output terminal, used to provide operating power to various circuits of the walkie-talkie. The power switch is connected to the output enable pin of the boost converter.

[0008] The battery type detection unit is provided with a battery type detection contact, which is connected to the negative terminal contact of the charging interface. The negative terminal contact of the 1.5V battery is correspondingly provided with the battery type detection contact and the two are in an open / closed state.

[0009] The 1.5V battery can be a 1.5V rechargeable battery or a 1.5V dry cell battery;

[0010] The battery type detection contact is located at a position corresponding to the outer surface of the 1.5V battery. The battery casing of the 1.5V rechargeable battery has an exposed portion that is not covered by an insulating outer layer. The exposed portion makes contact with the battery type detection contact to form an electrical connection, thereby connecting the negative terminal contact of the 1.5V battery with the negative terminal contact of the charging interface.

[0011] Furthermore, it also includes a battery replacement detection unit, a soft switch controller, and a power on / off controller. The input terminal of the battery replacement detection unit is connected to the output terminal of the 1.5V battery. The microprocessor of the walkie-talkie is equipped with a battery usage time accumulation module. The battery usage time accumulation module has a reset detection input terminal for resetting the accumulated time. The output terminal of the battery replacement detection unit is connected to the reset detection input terminal.

[0012] The output terminal of the microprocessor is connected to the control terminal of the soft switch controller, the output terminal of the soft switch controller is connected to the control terminal of the power on / off controller, and the output terminal of the power on / off controller is connected to the output enable pin of the boost converter.

[0013] Furthermore, the output of the battery type detection unit is connected to the battery type detection input of the microprocessor, and the microprocessor is equipped with a corresponding power calculation module according to different battery types.

[0014] Furthermore, the boost converter is model AP2065ATCER, and it is set to output a DC voltage of 2.9V.

[0015] Furthermore, the minimum input voltage of the low-voltage protection unit is 2.1V. When the input voltage is less than 2.1V, the low-voltage protection unit stops working.

[0016] A 1.5V powered walkie-talkie includes a power supply system and various circuits that are powered by the power supply system and enable the walkie-talkie function. The power supply system is the same as the power supply system of the 1.5V powered walkie-talkie described above, and all circuits are energy-saving circuits.

[0017] Furthermore, the operating voltage of each of the circuit components is required to not exceed 2.9V.

[0018] Furthermore, the walkie-talkie includes the power system, antenna interface, transceiver circuit, radio frequency integrated circuit, audio amplifier, speaker, microphone, and microprocessor;

[0019] The power supply system provides operating power to the microprocessor, the radio frequency integrated circuit, the audio amplifier, and the transceiver circuit. All components of the microprocessor, the radio frequency integrated circuit, the audio amplifier, and the transceiver circuit employ energy-saving circuitry.

[0020] The antenna interface is bidirectionally connected to the transceiver circuit, the transceiver circuit is bidirectionally connected to the radio frequency integrated circuit, the radio frequency integrated circuit is bidirectionally connected to the microprocessor, the audio output terminal of the radio frequency integrated circuit is connected to the input terminal of the audio amplifier, the output terminal of the audio amplifier is connected to the speaker, and the output terminal of the microphone is connected to the audio input terminal of the radio frequency integrated circuit.

[0021] Furthermore, the microprocessor is model HC32L130J8TA, the radio frequency integrated circuit is model BK4819, and the audio amplifier is model BU7150NUV.

[0022] By adopting the above solution, the walkie-talkie and its power system of this utility model, powered by a 1.5V battery, can be described as the minimum power supply solution, thus achieving energy saving and environmental protection. Moreover, its power supply method is very flexible, as it can be powered by either a 1.5V rechargeable battery or the most commonly used 1.5V dry cell battery on the market. Purchasing and replacing batteries is very convenient, thereby achieving minimal operating costs.

[0023] Furthermore, a battery type detection contact is cleverly incorporated into the power system. This contact is positioned corresponding to the outer surface of the 1.5V battery. When a 1.5V battery is inserted, this contact will make contact with the battery's outer surface. When powered by a 1.5V dry cell battery, the battery type detection contact contacts the insulating outer layer that completely covers the battery's casing. The negative contact of the 1.5V dry cell battery is disconnected from the negative charging contact of the charging interface, preventing the 1.5V dry cell battery from being charged and ensuring its safe use. When powered by a 1.5V rechargeable battery, the casing of the 1.5V rechargeable battery has an exposed portion that can make electrical contact with the battery type detection contact. This connects the negative contact of the 1.5V rechargeable battery to the negative charging contact of the charging interface, thus creating a closed-loop charging circuit that allows the 1.5V rechargeable battery to be charged.

[0024] In addition, a low-voltage protection unit is set in the power supply system to prevent the power supply output voltage of the boost converter from being too low to drive the various circuits of the walkie-talkie, causing abnormal operation or crashing of the walkie-talkie.

[0025] Furthermore, the power supply system of this utility model also includes a battery replacement detection unit, a soft-switching controller, and a power-on / off controller. The battery replacement detection unit allows the microprocessor to detect the replacement of a new battery. The soft-switching controller and power-on / off controller enable soft switching even when the walkie-talkie is off. Soft switching means that after a new battery is successfully installed, the microprocessor continues to operate normally regardless of whether the walkie-talkie is off or on. This allows the microprocessor to perform battery replacement detection and reset the accumulated new battery usage time, thus achieving a battery usage time accumulation function. This function is of great significance for assessing battery health, predicting battery life, optimizing device performance, and making decisions regarding battery maintenance and replacement.

[0026] Furthermore, the output of the battery type detection unit is connected to the battery type detection input of the microprocessor. The microprocessor has corresponding power calculation modules set according to different battery types, so that the battery type of the new battery can be detected, and the microprocessor can select and call the corresponding battery power calculation module according to the detected battery type.

[0027] This utility model discloses a 1.5V powered walkie-talkie. Its power supply system adopts the power supply system of the aforementioned 1.5V powered walkie-talkie, and all its circuits adopt energy-saving circuits, thereby ensuring that the power supply system is sufficient to provide working power for each circuit. Attached Figure Description

[0028] Figure 1 This is a circuit block diagram of Embodiment 1 of this utility model;

[0029] Figure 2 This is a circuit diagram of Embodiment 1 of this utility model;

[0030] Figure 3 This is a circuit block diagram of Embodiment 2 of this utility model;

[0031] Figure 4 The circuit diagrams for Embodiments 2 and 3 of this utility model are shown below.

[0032] Figure 5 This is a schematic diagram illustrating the principle of battery type detection in this utility model;

[0033] Figure 6 The circuit diagram of the walkie-talkie powered by 1.5V in this utility model. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0035] In this invention, the terms "comprising" and "equipped with," and any variations thereof, are intended to cover non-exclusive inclusion.

[0036] Example 1:

[0037] This utility model discloses a power supply system for a 1.5V powered walkie-talkie. For Embodiment 1, please refer to... Figure 1 , Figure 2 and Figure 5 .

[0038] like Figure 1 As shown, the power supply system of a 1.5V powered walkie-talkie of this utility model includes a charging interface, a battery type detection unit, a 1.5V battery, a boost converter, a low-voltage protection unit, and a power switch. The charging interface is connected to the input terminal of the 1.5V battery through the battery type detection unit. The output terminal of the 1.5V battery is connected to the input terminal of the boost converter. The output terminal of the boost converter is connected to the input terminal of the low-voltage protection unit. The output terminal of the low-voltage protection unit is the power supply output terminal, used to provide working power to various circuits of the walkie-talkie. The power switch is connected to the output enable pin of the boost converter.

[0039] like Figure 2 As shown, the charging interface includes a positive charging contact P1 and a negative charging contact P5. The positive charging contact P1 is connected to the positive contact P2 of the 1.5V battery B1 via a diode D1. The negative contact P3 of the 1.5V battery B1 is grounded. The battery type detection unit is provided with a battery type detection contact A, which is connected to the negative charging contact P5 of the charging interface. The negative contact P3 of the 1.5V battery B1 is correspondingly set to the battery type detection contact A, and the two are in an open / closed state. During installation, the battery type detection contact A can be soldered onto the pad P4 and positioned corresponding to the outer surface of the 1.5V battery B1 (in this invention, the outer surface of the battery refers only to the cylindrical outer surface of the battery, excluding the upper and lower bottom surfaces). When the 1.5V battery B1 is installed, the battery type detection contact A will contact the outer surface of the 1.5V battery B1.

[0040] The 1.5V battery can be a 1.5V rechargeable battery or a 1.5V dry cell battery; specifically, the 1.5V rechargeable battery can be a single AA nickel-metal hydride battery; the 1.5V dry cell battery can be a single AA dry cell battery.

[0041] like Figure 5 As shown, when 1.5V battery B1 uses a 1.5V dry cell battery (AA battery), please refer to [reference needed]. Figure 5 The 1.5V dry cell battery 2, labeled AL on the left, has its casing completely covered by an insulating outer layer 21. In existing 1.5V batteries, the casing and negative terminal are connected; the insulating outer layer completely covers the entire battery casing, leaving only the top and bottom positive and negative contact surfaces exposed. In this invention, to achieve battery type detection, the 1.5V rechargeable battery has been specifically improved. For details, see [link to relevant documentation]. Figure 5 The 1.5V rechargeable battery 1 labeled NI on the right has an exposed portion 12 on its casing that is not covered by the insulating outer layer 11. Specifically, a section of the casing is not covered by the insulating outer layer 11 on the negative terminal side of the 1.5V rechargeable battery 1, which is the exposed portion 12. When the 1.5V rechargeable battery 1 is installed, the battery type detection contact A can just contact the exposed portion 12, realizing the electrical connection between the exposed portion 12 and the battery type detection contact A. This connects the negative terminal contact P3 of the 1.5V rechargeable battery 1 and the charging negative terminal contact P5 of the charging interface, so that the charging circuit can be connected normally and the charging function of the 1.5V rechargeable battery 1 can be realized. The battery type detection contact A can be a flexible metal contact to better connect with the exposed part 12. The charging positive contact P1, charging negative contact P5, positive contact P2 and negative contact P3 are also flexible metal contacts.

[0042] like Figure 2 As shown, in this embodiment, the boost converter U1 is model AP2065ATCER. The 1.5V battery B1 generates a 2.9V DC voltage through the boost converter U1 to provide power to the various circuits of the walkie-talkie. By setting the output voltage of the boost converter U1 to 2.9V instead of using a higher voltage through the external parameters, the normal operation of the various circuits of the walkie-talkie can be met, while reducing power consumption and increasing battery life.

[0043] The positive contact P2 of the 1.5V battery B1 is connected to the input terminal (pin 6) of the boost converter U1 through inductor L2. Inductor L2 is also connected to the switch pin (pin 1) of the boost converter U1 through inductor L1. Pin 2 of the boost converter U1 is grounded, and pin 3 is the feedback input pin, which is grounded through resistor R12. Pin 4 of the boost converter U1 is the output enable pin (high level to enable, low level to disable). Pin 4 of the boost converter U1 is connected to one end of the power switch S2 and grounded through capacitor C15. The other end of the power switch S2 is connected to the power supply BAT1V2 of the 1.5V battery B1. Pin 5 of the boost converter U1 is its output pin, which is connected to the low-voltage protection unit through inductor L3. In this embodiment, the minimum input voltage of the low-voltage protection unit is set to 2.1V.

[0044] Specifically, the low-voltage protection unit mainly consists of dual diodes D5 (DA221), a resistor-loaded NPN transistor Q2 (DTC114EE), and a field-effect transistor Q3. During operation, the output voltage of the boost converter U1 is divided into two paths. One path provides a high level to the gate (G) of the field-effect transistor Q3 through resistor R6, preventing the source (S) and drain (D) terminals of Q3 from conducting, thus cutting off the power supply to all parts of the walkie-talkie, equivalent to a shutdown state. The other path is input from pin 1 of dual diode D5, passes through internal dual diodes, and outputs from pin 3 of dual diode D5. This output then enters the base (B) of the resistor-loaded NPN transistor Q2, controlling the collector (C) and emitter (E) terminals of Q2 to conduct. The conduction voltage of the resistor-loaded NPN transistor Q2 (DTC114EE) needs to be greater than 0.7V. However, there is a 1.4V voltage drop after passing through dual diode D5 (DA221), so the voltage input from pin 1 of dual diode D5... A voltage greater than 2.1V is required to meet the conduction condition of the NPN transistor Q2. That is, when the voltage input from the first pin of the dual diode D5 is greater than or equal to 2.1V, the NPN transistor Q2 will conduct, and thus the MOSFET Q3 will conduct, and the low-voltage protection unit will generate a 2.9V power supply output, allowing the walkie-talkie to power on normally. When the voltage input from the first pin of the dual diode D5 is less than 2.1V, the NPN transistor Q2 will not conduct, and the MOSFET Q3 will also not conduct. The low-voltage protection unit will not generate a power supply output, and the walkie-talkie will power off. Since the minimum output voltage of the boost converter U1 is 2.6V and the maximum duty cycle is 80%, this means that when the input voltage is less than 0.52V, its boost function will fail. The output voltage of the boost converter U1 will be equal to the input voltage, and the 0.52V input voltage is insufficient to turn on the MOSFET Q3, thus preventing the walkie-talkie from malfunctioning or freezing due to excessively low voltage.

[0045] By adopting the above solution, the walkie-talkie and its power system of this utility model, powered by a 1.5V battery, can be described as the minimum power supply solution, thus achieving energy saving and environmental protection. Moreover, its power supply method is very flexible, as it can be powered by either a 1.5V rechargeable battery or the most commonly used 1.5V dry cell battery on the market. Purchasing and replacing batteries is very convenient, thereby achieving minimal operating costs.

[0046] Furthermore, a battery type detection contact A is cleverly provided in the power system. This contact is positioned corresponding to the outer surface of the 1.5V battery B1. When the 1.5V battery B1 is installed, the battery type detection contact A will come into contact with the outer surface of the battery. When powered by a 1.5V dry cell battery, the battery type detection contact A contacts the insulating outer layer 21 that completely covers the casing of the 1.5V dry cell battery. The negative contact P3 of the 1.5V dry cell battery is in an open state with the charging negative contact P5 of the charging interface, and the 1.5V dry cell battery will not be charged, ensuring the safety of the 1.5V dry cell battery. When powered by a 1.5V rechargeable battery, the casing of the 1.5V rechargeable battery has an exposed part 12 that can make electrical connection with the battery type detection contact A, thereby connecting the negative contact P3 of the 1.5V rechargeable battery with the charging negative contact P5 of the charging interface. This ensures that the charging circuit is closed and the 1.5V rechargeable battery can be charged.

[0047] If a user cannot find a replacement 1.5V rechargeable battery with an exposed portion 12 as described in this utility model, they can directly use a common 1.5V rechargeable battery on the market and simply peel off the corresponding insulating outer layer 11.

[0048] Furthermore, this invention includes a low-voltage protection unit in the power supply system to prevent the output voltage of the boost converter from being too low to drive the various circuits of the walkie-talkie, thus avoiding abnormal operation or crashes of the walkie-talkie.

[0049] Example 2:

[0050] This utility model discloses a power supply system for a 1.5V powered walkie-talkie. For embodiment two, please refer to [link to embodiment two]. Figure 3 , Figure 4 and Figure 5 .

[0051] like Figure 3As shown, the difference between this embodiment and Implementation 1 is only that: it also includes a battery replacement detection unit, a soft switch controller, and a power on / off controller. The input terminal of the battery replacement detection unit is connected to the output terminal of the 1.5V battery. The microprocessor of the walkie-talkie is equipped with a battery usage time accumulation module. The battery usage time accumulation module has a reset detection input terminal for resetting the accumulated time. The output terminal of the battery replacement detection unit is connected to the reset detection input terminal.

[0052] The output terminal of the microprocessor is connected to the control terminal of the soft switch controller, the output terminal of the soft switch controller is connected to the control terminal of the power on / off controller, and the output terminal of the power on / off controller is connected to the output enable pin of the boost converter.

[0053] like Figure 4 As shown, the power-on / off controller uses a PNP transistor Q1 with a resistor, the battery replacement detection unit mainly consists of an electrolytic capacitor E2, a diode D2, a PNP transistor Q4, a resistor R8, a NPN transistor Q5 with a resistor, an NPN transistor Q6 with a resistor, and a resistor R3, and the soft-switching controller uses an NPN transistor Q7 with a resistor.

[0054] The output enable pin (pin 4) of the boost converter U1 is connected to the collector (C) of the PNP transistor Q1. The power supply BAT1V2 of the 1.5V battery B1 is connected to the emitter (E) of the PNP transistor Q1. The base (B) of the PNP transistor Q1 is connected to the anode of diode D4, the collector (C) of the NPN transistor Q5, and the collector (C) of the NPN transistor Q7. The cathode of diode D4 is connected to one end of the power switch S2 and the cathode of diode D3. The anode of diode D3 is connected to one end of resistor R2 and the AD sampling terminal of the microprocessor. The other end of resistor R2 is connected to the 2.9V power supply output terminal of the low-voltage protection unit. The other end of the power switch S2 is grounded. The emitter (E) of the NPN transistor Q7 is grounded. The base (B) of the NPN transistor Q7 is connected to the control terminal of the microprocessor.

[0055] Pin 4 of the boost converter U1 is the output enable pin; a high level enables it, and a low level disables it. The power supply BAT1V2 of the 1.5V battery B1 is connected to the emitter (E) of the PNP transistor Q1, and through the built-in resistor of Q1, a high level is provided to the base (B) of Q1. At this time, Q1 is in the off state, and its collector (C) is low, meaning pin 4 of the boost converter U1 is low, shutting off the output of the boost converter U1 and turning the walkie-talkie off. When the power switch S2 is pressed, it conducts, pulling the high level at the base of the PNP transistor Q1 low through diode D4. This conducts between the collector and emitter of Q1, making the collector high, and thus pin 4 of the boost converter U1 high, enabling the output of the boost converter U1 and powering on the walkie-talkie.

[0056] The power supply BAT1V2 of the 1.5V battery B1 is connected to the negative terminal of diode D2, the emitter of PNP transistor Q4, and the emitter of PNP transistor Q1 with resistance, respectively. The positive terminal of diode D2 is connected to the positive terminal of electrolytic capacitor E2 and one end of resistor R7, respectively. The other end of resistor R7 is connected to the base of PNP transistor Q4. The negative terminal of electrolytic capacitor E2 is grounded. The first end of resistor R8 is grounded. The second end of resistor R8 is connected to the base of NPN transistor Q5 with resistance, the collector of PNP transistor Q4, and the base of NPN transistor Q6 with resistance, respectively. The emitter of NPN transistor Q6 with resistance is grounded. The collector of NPN transistor Q6 with resistance is connected to one end of resistor R3 and the input terminal of the microprocessor. The other end of resistor R3 is connected to the 2.9V power supply output terminal of the low-voltage protection unit. The microprocessor is equipped with a battery usage time accumulation module, which has a reset detection input terminal for resetting the accumulated time. The collector of the NPN transistor Q6 with resistor is connected to the reset detection input terminal.

[0057] When the old battery is removed, the electricity stored in the electrolytic capacitor E2 is quickly discharged through the diode D2. After the new battery is successfully installed, regardless of whether the walkie-talkie is powered off or on, the power supply BAT1V2 of the 1.5V battery B1 first charges the electrolytic capacitor E2 through resistors R5 and R7. This charging process gives the base (B) of the PNP transistor Q4 a low-level period, allowing the emitter (E) and collector (C) of the PNP transistor Q4 to conduct. The power supply BAT1V2 of the 1.5V battery B1 flows from the emitter (E) to the collector (C) of the PNP transistor Q4, simultaneously giving the base (B) of the resistive NPN transistor Q5 a high-level period, causing the collector (C) and emitter (E) of the resistive NPN transistor Q5 to conduct. The high level at the base (B) of the resistive PNP transistor Q1 is pulled low, thus turning on the collector (C) and emitter (E) of the resistive PNP transistor Q1. The collector (C) of the resistive PNP transistor Q1 becomes high, meaning pin 4 of the boost converter U1 is high, activating the output of the boost converter U1 and providing power to the walkie-talkie. The microprocessor starts working and immediately sends a high level to the base (B) of the NPN transistor Q7, which keeps the base (B) of the PNP transistor Q1 low, maintaining the power supply output of the boost converter U1. This enables soft-start from the power-off state, meaning that the microprocessor can still operate normally when the power switch S2 is off, facilitating battery type detection during battery replacement. Simultaneously, the power supply BAT1V2 from the 1.5V battery B1, flowing from the emitter (E) to the collector (C) of the PNP transistor Q4, also sends a high level to the base (B) of the NPN transistor Q6. This causes the collector (C) and emitter (E) of the NPN transistor Q6 to conduct, pulling the high level connected to the collector (C) of the NPN transistor Q6 via resistor R3 low. The microprocessor detects this low high level on the collector (C) of the NPN transistor Q6, determines that the battery has been replaced, and sends a command to reset the accumulated time.

[0058] Example 3:

[0059] This utility model discloses a power supply system for a 1.5V powered walkie-talkie. Please refer to Embodiment Three. Figure 4 .like Figure 4 As shown, the difference between this embodiment and Embodiment 1 or Embodiment 2 is only that: the battery type detection unit further includes resistors R4 and R9, the battery type detection contact A is connected to one end of resistor R4 and one end of resistor R9 respectively, the other end of resistor R4 is connected to the drain of field-effect transistor Q3 and the power supply output terminal, the other end of resistor R9 is connected to the battery type detection input terminal of the microprocessor, and the microprocessor is equipped with a corresponding power calculation module according to different battery types.

[0060] When the 1.5V rechargeable battery 1 of this utility model is used, the battery type detection contact A contacts the exposed part 12 of the 1.5V rechargeable battery 1, which is equivalent to the battery negative terminal contact P3 of the 1.5V battery B1 being connected to the battery type detection contact A, that is, the battery type detection contact A is connected to ground, pulling the 2.9V high level on the resistor R4 low. The microprocessor detects that the level of the battery type detection contact A changes from high level to low level, thereby determining that the battery installed in the walkie-talkie is a rechargeable battery, so that the microprocessor can select and call the power calculation module of the rechargeable battery.

[0061] This utility model discloses a 1.5V powered walkie-talkie, such as... Figure 6 As shown, it includes a power supply system and various circuits that are powered by the power supply system and can realize the intercom function. The power supply system adopts the power supply system of any of the 1.5V power supply walkie-talkies in the previous embodiments, and all circuits adopt energy-saving circuits.

[0062] Furthermore, the operating voltage of each of the circuit components is required to not exceed 2.9V.

[0063] Furthermore, the walkie-talkie includes the power system, antenna interface, transceiver circuit, radio frequency integrated circuit, audio amplifier, speaker, microphone, and microprocessor;

[0064] The power supply system provides operating power to the microprocessor, the radio frequency integrated circuit, the audio amplifier, and the transceiver circuit. All components of the microprocessor, the radio frequency integrated circuit, the audio amplifier, and the transceiver circuit employ energy-saving circuitry.

[0065] The antenna interface is bidirectionally connected to the transceiver circuit, the transceiver circuit is bidirectionally connected to the radio frequency integrated circuit, the radio frequency integrated circuit is bidirectionally connected to the microprocessor, the audio output terminal of the radio frequency integrated circuit is connected to the input terminal of the audio amplifier, the output terminal of the audio amplifier is connected to the speaker, and the output terminal of the microphone is connected to the audio input terminal of the radio frequency integrated circuit.

[0066] Furthermore, the microprocessor is model HC32L130J8TA, supports an operating voltage of 1.8~5.5V, has a flexible power management system, and ultra-low power consumption performance; the RF integrated circuit is model BK4819, supports an operating voltage of 2.6~3.6V; the audio amplifier is model BU7150NUV, supports an operating voltage of 0.93~3.5V. Therefore, the boost converter in the power supply system of this utility model is selected as boost converter U1 with a minimum output voltage of 2.6V.

[0067] In this invention, the microprocessor is equipped with corresponding power calculation modules according to different battery types, and the corresponding power calculation module can be selected and called according to the input battery type detection signal. In addition, the microprocessor is equipped with a battery usage time accumulation module, which can reset the accumulated time according to the instruction received by its reset control terminal. These are all conventional technical means in the field, and this invention does not improve upon them.

[0068] In this invention, the calculation result (remaining battery power) of the power calculation module in the microprocessor can be displayed on the walkie-talkie screen. The cumulative result (used time) of the battery usage time accumulation module in the microprocessor can also be displayed on the walkie-talkie screen. These are all conventional techniques in the field, and this invention does not improve upon them.

[0069] The embodiments described in this utility model are merely some, not all, of the embodiments of this utility model. Based on the embodiments shown, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model. All other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A power supply system for a 1.5V powered intercom, characterized by: The power supply system comprises a charging interface, a battery type detection unit, a 1.5V battery, a voltage boosting converter, a low-voltage protection unit and a power switch, the charging interface is connected to the input end of the 1.5V battery through the battery type detection unit, the output end of the 1.5V battery is connected to the input end of the voltage boosting converter, the output end of the voltage boosting converter is connected to the input end of the low-voltage protection unit, and the output end of the low-voltage protection unit is the power supply output end for providing working power supply for each part circuit of the intercom. The battery type detection unit is provided with a battery type detection contact point connected to the charging negative contact point of the charging interface, and the negative contact point of the 1.5V battery is correspondingly arranged with the battery type detection contact point and in an open and broken state. The 1.5V battery is a 1.5V rechargeable battery or a 1.5V dry battery. The battery shell of the 1.5V rechargeable battery has an exposed part not covered by an insulating outer layer, and the exposed part is electrically connected to the battery type detection contact point, thereby connecting the path between the negative contact point of the 1.5V battery and the charging negative contact point of the charging interface.

2. A power supply system for a 1.5V powered intercom according to claim 1, characterized in that: The power supply system further comprises a battery replacement detection unit, a soft switch controller and a switch-off controller, the input end of the battery replacement detection unit is connected to the output end of the 1.5V battery, the microprocessor of the intercom is provided with a battery use time accumulation module, the battery use time accumulation module has a reset detection input end for resetting the accumulated time, and the output end of the battery replacement detection unit is connected to the reset detection input end. The output end of the microprocessor is connected to the control end of the soft switch controller, the output end of the soft switch controller is connected to the control end of the switch-off controller, and the output end of the switch-off controller is connected to the output enable foot of the voltage boosting converter.

3. A power supply system for a 1.5V powered intercom according to claim 2, characterized in that: The output end of the battery type detection unit is connected to the battery type detection input end of the microprocessor, and the microprocessor is respectively provided with a corresponding power calculation module according to different battery types.

4. The power supply system of a 1.5V powered intercom according to claim 2, characterized in that: The output end of the battery type detection unit is connected to the battery type detection input end of the microprocessor, and the microprocessor is respectively provided with a corresponding power calculation module according to different battery types.

5. The power supply system of a 1.5V powered intercom according to claim 1, characterized in that: The model of the voltage boosting converter is AP2065ATCER, which sets an output of 2.9V direct current voltage.

6. The power supply system of a 1.5V powered intercom according to claim 1, characterized in that: The minimum input voltage of the low-voltage protection unit is 2.1V, and the low-voltage protection unit stops working when the input voltage is less than 2.1V.

7. A 1.5V powered intercom, characterized by: The power supply system comprises a power supply system and each part circuit capable of realizing the intercom function and provided with working power supply by the power supply system, the power supply system adopts the power supply system of the 1.5V powered intercom according to any one of claims 1-6, and each part circuit adopts an energy-saving type circuit.

8. A 1.5V powered intercom according to claim 7, characterized in that: The working voltage requirement of each part circuit does not exceed 2.9V.

9. A 1.5V powered intercom according to claim 7, characterized in that: The intercom comprises the power supply system, an antenna interface, a transceiver circuit, a radio frequency integrated circuit, an audio amplifier, a loudspeaker, a microphone and the microprocessor. The power supply system provides working power for the microprocessor, the radio frequency integrated circuit, the audio amplifier and the transceiver circuit, and the microprocessor, the radio frequency integrated circuit, the audio amplifier and the transceiver circuit all adopt energy-saving circuits; The antenna interface is bidirectionally connected with the transceiver circuit, the transceiver circuit is bidirectionally connected with the radio frequency integrated circuit, the radio frequency integrated circuit is bidirectionally connected with the microprocessor, an audio output end of the radio frequency integrated circuit is connected with an input end of the audio amplifier, an output end of the audio amplifier is connected with the loudspeaker, and an output end of the microphone is connected with an audio input end of the radio frequency integrated circuit.

10. A 1.5V powered intercom according to claim 9, characterized in that: The model of the microprocessor is HC32L130J8TA, the model of the radio frequency integrated circuit is BK4819, and the model of the audio amplifier is BU7150NUV.

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