Charging prompt circuit and device

Abstract

The utility model discloses a charging prompting circuit and device, and relates to the technical field of charging prompting, and the circuit comprises a charging power supply connecting end which is used for connecting a charging power supply; the prompting assembly is used for prompting the charging state of the battery; the charging circuit charges the battery when a charging power supply is connected, and the charging circuit is used for generating a non-charging signal or a charging signal or a full-electric signal according to the charging state of the battery and the voltage of a reference power supply; the main control circuit is used for controlling the prompting assembly to prompt the corresponding charging state according to the received non-charging signal or charging signal or full-electric signal sent by the charging circuit. Thus, the charging prompt circuit controls the prompt assembly to prompt the charging state of the battery according to the generated non-charging signal or charging signal or full-electric signal, so that the use of detection equipment is reduced in a limited space, and the prompt of the charging state is realized for a user under the condition that the number of chip pins is limited.

Description

Technical Field

[0001] The utility model relates to the technical field of charging reminder, in particular to a charging reminder circuit and a device. Background Art

[0002] In the development of micro devices, engineers often face a challenge: ensuring the miniaturization of the device while taking into account the interactive function between the device and the user. Especially in micro devices that need to be charged and reused multiple times, how to reduce the use of detection equipment in a limited space, and how to maintain interaction with the user while charging with a limited number of chip pins, this problem needs to be solved urgently. Utility Model Content

[0003] The main purpose of the utility model is to propose a charging reminder circuit and device, which aims to solve the problem of how to reduce the use of detection equipment in a limited space in a micro device that is charged multiple times and reused, and how to still be able to interact with the user in the charging state when the number of chip pins is limited.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a charging reminder circuit, wherein the charging reminder circuit is provided with a battery and a charging power supply connection terminal, and the charging reminder circuit comprises:

[0005] Charging power supply connection terminal, used to connect to the charging power supply;

[0006] A prompt component, used to prompt the charging status of the battery;

[0007] a charging circuit, wherein a power input terminal of the charging circuit is electrically connected to the charging power connection terminal, and the charging circuit is used to charge the battery when the charging power is connected, and the charging circuit is also used to generate an uncharged signal, a charging signal, or a fully charged signal according to the charging power connection state of the charging power connection terminal and the charging state of the battery;

[0008] A main control circuit, wherein the detection input terminal of the main control circuit is electrically connected to the detection output terminal of the charging circuit, and the control terminal of the main control circuit is electrically connected to the controlled terminal of the prompt component, and is used to control the prompt component to prompt the corresponding charging status according to receiving an uncharged signal, a charging signal or a fully charged signal sent by the charging circuit.

[0009] In one embodiment, the charging circuit comprises:

[0010] A charging management unit, the power input terminal of the charging management unit is electrically connected to the charging power connection terminal, and the detection signal output terminal of the charging management unit is electrically connected to the detection input terminal of the main control circuit, and is used to charge the battery when a charging power source is connected; the charging management unit is used to generate and output the charging signal to the main control circuit when the battery is being charged, or when the battery is fully charged, the detection signal output terminal of the charging management unit is in a high impedance state;

[0011] A detection unit, the detection terminal of the detection unit is electrically connected to the charging power connection terminal; it is used to output the non-charging signal to the main control circuit when the battery is not being charged; the detection unit is used to output the full charge signal to the main control circuit when the battery is fully charged.

[0012] In one embodiment, the detection unit includes a reference power connection terminal, a first resistor, a second resistor, a third resistor and a first transistor. The reference power connection terminal is electrically connected to the first end of the first resistor. The second end of the first resistor is respectively electrically connected to the detection signal output terminal of the charging management unit, the detection input terminal of the main control circuit and the first end of the second resistor. The second end of the second resistor is respectively electrically connected to the collector of the first transistor, the base of the first transistor and the first end of the third resistor. The second end of the third resistor is electrically connected to the charging power connection terminal, and the emitter of the first transistor is grounded.

[0013] In one embodiment, the detection input terminal of the main control circuit is specifically the ADC sampling port of the main control circuit.

[0014] In one embodiment, the prompting component is one or more of an LED lamp, a display screen, a buzzer and a speaker.

[0015] In one embodiment, the charging prompting circuit further includes a linear voltage regulator, which is used to step down the battery voltage output by the battery and then output it to the electrical load.

[0016] The present invention also proposes a charging prompting circuit device, and the charging prompting circuit device includes the charging prompting circuit as described above.

[0017] The technical solution of the present invention adopts a charging prompting circuit, and the charging prompting circuit is provided with a battery and a charging power connection terminal. The charging prompting circuit includes:

[0018] A charging power connection terminal for connecting to a charging power source; a prompting component for prompting the charging state of the battery; a charging circuit, the power input terminal of the charging circuit is electrically connected to the charging power connection terminal, and the charging circuit is used to charge the battery when the charging power source is connected, and the charging circuit is also used to generate an uncharged signal, a charging signal or a full charge signal according to the charging power access state of the charging power connection terminal and the charging state of the battery; a main control circuit, the detection input terminal of the main control circuit is electrically connected to the detection output terminal of the charging circuit, and the control terminal of the main control circuit is electrically connected to the controlled terminal of the prompting component, and is used to control the prompting component to prompt the corresponding charging state according to the uncharged signal, the charging signal or the full charge signal received from the charging circuit. In this way, the charging prompting circuit can enable the main control circuit to control the prompting component to prompt the charging state of the battery according to the uncharged signal, the charging signal or the full charge signal generated by the charging circuit, so as to reduce the use of detection devices in a limited space and still be able to prompt the user of the charging state when the number of chip pins is limited. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on the structures shown in these drawings without creative efforts.

[0020] Figure 1 Schematic diagram of the circuit structure of an embodiment of the charging prompting circuit provided by the present invention;

[0021] Figure 2 Schematic diagram of the circuit structure of another embodiment of the charging prompting circuit provided by the present invention;

[0022] Explanation of the reference numerals in the drawings:

[0023] 1 - Charging power connection terminal; 2 - Charging circuit; 21 - Charging management unit; 22 - Detection unit; 3 - Battery; 4 - Linear voltage regulator; 5 - Prompting component; 6 - Main control circuit.

[0024] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Detailed Embodiments

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0028] The present utility model provides a charging prompt circuit. Please refer to Figure 1 and Figure 2 The charging prompt circuit is provided with a battery 3 and a charging power connection terminal 1. The charging prompt circuit includes:

[0029] The charging power connection terminal 1 is used to connect to a charging power source;

[0030] The prompt component 5 is used to prompt the charging state of the battery 3;

[0031] The charging circuit 2, the power input end of the charging circuit 2 is electrically connected to the charging power connection terminal 1. The charging circuit 2 is used to charge the battery 3 when a charging power source is connected, and the charging circuit 2 is further used to generate an uncharged signal, a charging signal, or a full charge signal according to the charging power source connection state of the charging power connection terminal 1 and the charging state of the battery 3;

[0032] The main control circuit 6, the detection input end of the main control circuit 6 is electrically connected to the detection output end of the charging circuit 2, and the control end of the main control circuit 6 is electrically connected to the controlled end of the prompting component 5, and is configured to control the prompting component 5 to prompt the corresponding charging state according to the received uncharged signal or charging signal or full charge signal sent by the charging circuit 2.

[0033] In this embodiment, the charging power supply can be set as a wireless charging power supply. For example, a wireless charging transmitting device sends magnetic flux through a coil to a receiving coil disposed in the charging prompting circuit to receive voltage, and then converts it into a charging power supply and connects it to the charging power supply connection terminal 1. It can also be connected through a wired method such as a USB interface and convert an external power supply into a charging power supply and then connect it to the charging power supply connection terminal 1. The charging circuit can detect the voltage value output by the charging power supply connection terminal 1 to judge the charging power supply access state of the charging power supply connection terminal, and can judge the charging state of the battery or the full charge state by connecting a coulombmeter to the charging circuit or setting the charging circuit as a charging management chip and matching it with a special circuit (such as a subnet network formed by multiple voltage dividing resistors for power detection through the ADC sampling pin of the charging management chip). The prompting component 5 can be set as one or more of an LED lamp, a display screen, a buzzer, and a speaker. The charging circuit 2 can be set as a power management chip, a linear voltage regulator, a power module (such as an ADuM5000 chip). The main control circuit 6 can be implemented by, for example, an MCU (Microcontroller Unit, micro control unit), a DSP (Digital Signal Process, digital signal processing chip), an FPGA (Field Programmable Gate Array, programmable logic gate array chip), such as an SOC (System OnChip, system-level chip), etc.

[0034] Specifically, for example, when the charging power supply connection terminal 1 is not connected to the charging power supply, the charging circuit 2 generates an uncharged signal and sends it to the main control circuit 6, and the main control circuit 6 controls the first LED lamp to be constantly on to prompt the user that the battery 3 is not being charged; or when the charging power supply connection terminal 1 is connected to the charging power supply and the battery 3 is being charged, the charging circuit 2 generates a charging signal and sends it to the main control circuit 6, and the main control circuit 6 controls the second LED lamp to be constantly on to prompt the user that the battery 3 is being charged; or when the charging power supply connection terminal 1 is connected to the charging power supply and the battery 3 is fully charged, the charging circuit 2 generates a full charge signal and sends it to the main control circuit 6, and the main control circuit 6 controls the second LED lamp to flash to prompt the user that the battery 3 is fully charged.

[0035] In one embodiment, the charging circuit 2 includes:

[0036] A charging management unit 21, the power input terminal of the charging management unit 21 is electrically connected to the charging power connection terminal 1, and the detection signal output terminal of the charging management unit 21 is electrically connected to the detection input terminal of the main control circuit 6, and is used to charge the battery 3 when a charging power source is connected; the charging management unit 21 is used to generate and output the charging signal to the main control circuit 6 when the battery 3 is being charged, or when the battery 3 is fully charged, the detection signal output terminal of the charging management unit 21 is in a high impedance state;

[0037] A detection unit 22, the detection terminal of the detection unit 22 is electrically connected to the charging power connection terminal 1, and is used to output the non-charging signal to the main control circuit 6 when the battery 3 is not being charged; the detection unit 22 is used to output a full charge signal to the main control circuit 6 when the battery 3 is fully charged.

[0038] In this embodiment, when a charging power source is connected, the charging management unit 21 (charging management chip) converts the voltage of the charging power source into a voltage for safely supplying power to the battery 3 to charge the battery 3, and when the battery 3 is being charged, outputs a low level or a high level (i.e., a charging signal) to the main control circuit 6, or when the charging circuit 2 detects that the battery 3 is fully charged through a plurality of voltage dividing resistors or a fuel gauge, the detection signal output terminal of the charging management unit 21 is in a high impedance state. A reference power source is connected to the detection unit 22, and the reference power source can be generated by a reference circuit (such as LN5062, CN3323, SUM4056, and SUM4056) built into the charging management unit 21, or can also be generated by a voltage regulator block formed by chips such as TL431, MAX6035, ICL8069, and AD584. The detection unit 22 generates and sends a full charge signal to the main control circuit 6 according to the voltage of the charging power source and the voltage of the reference power source, or when the battery 3 is not being charged, generates and sends the non-charging signal to the main control circuit 6 according to the voltage of the reference power source. Among them, the high impedance state of the detection signal output terminal of the charging management unit 21 is equivalent to the output terminal being in a suspended or unconnected state, and will not affect other signals on the line, so that when the main control circuit 6 performs voltage value detection, the detection result specifically depends on the state of the detection unit 22 connected to the detection signal output terminal.

[0039] Specifically, the detection unit 22 includes a reference power connection terminal 3V, a first resistor R3, a second resistor R6, a third resistor R7, and a first transistor Q1. The reference power connection terminal is electrically connected to the first end of the first resistor R3. The second end of the first resistor R3 is respectively electrically connected to the detection signal output terminal of the charging management unit 21, the detection input terminal of the main control circuit 6, and the first end of the second resistor R6. The second end of the second resistor R6 is respectively electrically connected to the collector of the first transistor Q1, the base of the first transistor Q1, and the first end of the third resistor R7. The second end of the third resistor R7 is electrically connected to the charging power connection terminal 1. The emitter of the first transistor Q1 is grounded. Among them, the detection input terminal of the main control circuit is specifically the ADC sampling port of the main control circuit. For example, when the charging power connection terminal is not connected to a charging power source, there is no 5V voltage input at the charging power connection terminal (i.e., Figure 2 the 5V of

[0040] When the charging power connection terminal is connected to a charging power source, there is a 5V voltage input at the charging power connection terminal. The first transistor Q1 is turned on, and the detection signal output terminal of the charging management unit 21 outputs a low level, forcing the voltage detected by the ADC sampling port of the main control circuit 6 to be 0V.

[0041] When the charging power connection terminal is connected to a charging power source, there is a 5V voltage input at the charging power connection terminal. The first transistor Q1 is turned on, and the detection signal output terminal of the charging management unit 21 is in a high impedance state (equivalent to being disconnected). The first resistor R3 and the second resistor R6 form a voltage dividing network. At this time, the voltage detected by the ADC sampling port of the main control circuit 6 is 1.5V.

[0042] In an embodiment, the charging prompt circuit further includes a linear voltage regulator 4 for stepping down the battery voltage output by the battery 3 and then outputting it to the electrical load.

[0043] In this embodiment, combined with the previous embodiment, the reference power connection terminal specifically uses the voltage output after conversion by the linear voltage regulator 4 from the battery voltage of the battery 3. This can reduce the use of redundant components, reduce the volume of the charging prompt circuit, and also avoid using a power management chip configured with a reference circuit, making the charging prompt circuit more practical.

[0044] The present utility model further provides a charging prompt circuit device, which includes the above-mentioned charging prompt circuit. The specific structure of the charging prompt circuit refers to the above-mentioned embodiments. Since this charging prompt circuit device adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated one by one here.

[0045] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A charging reminder circuit, characterized in that: The charging reminder circuit is provided with a battery and a charging power supply connection terminal, and the charging reminder circuit comprises: Charging power supply connection terminal, used to connect to the charging power supply; A prompt component, used to prompt the charging status of the battery; a charging circuit, wherein a power input terminal of the charging circuit is electrically connected to the charging power connection terminal, and the charging circuit is used to charge the battery when the charging power is connected, and the charging circuit is also used to generate an uncharged signal, a charging signal, or a fully charged signal according to the charging power connection state of the charging power connection terminal and the charging state of the battery; A main control circuit, wherein the detection input terminal of the main control circuit is electrically connected to the detection output terminal of the charging circuit, and the control terminal of the main control circuit is electrically connected to the controlled terminal of the prompt component, and is used to control the prompt component to prompt the corresponding charging status according to receiving an uncharged signal, a charging signal or a fully charged signal sent by the charging circuit.

2. The charging reminder circuit according to claim 1, characterized in that: The charging circuit comprises: A charging management unit, wherein the power input terminal of the charging management unit is electrically connected to the charging power connection terminal, and the detection signal output terminal of the charging management unit is electrically connected to the detection input terminal of the main control circuit, and is used to charge the battery when the charging power supply is connected; the charging management unit is used to generate and output the charging signal to the main control circuit when the battery is charged, or when the battery is fully charged, the detection signal output terminal of the charging management unit is in a high impedance state; A detection unit, wherein the detection end of the detection unit is electrically connected to the charging power supply connection end; when the battery is not charged, the detection unit outputs the uncharged signal to the main control circuit; when the battery is fully charged, the detection unit outputs the fully charged signal to the main control circuit.

3. The charging reminder circuit according to claim 2, characterized in that: The detection unit includes a reference power connection terminal, a first resistor, a second resistor, a third resistor and a first transistor. The reference power connection terminal is electrically connected to the first end of the first resistor, the second end of the first resistor is electrically connected to the detection signal output terminal of the charging management unit, the detection input terminal of the main control circuit and the first end of the second resistor respectively, the second end of the second resistor is electrically connected to the collector of the first transistor, the base of the first transistor and the first end of the third resistor respectively, the second end of the third resistor is electrically connected to the charging power connection terminal, and the emitter of the first transistor is grounded.

4. The charging reminder circuit according to claim 2, characterized in that: The detection input end of the main control circuit is specifically an ADC sampling port of the main control circuit.

5. The charging reminder circuit according to claim 1, characterized in that: The prompt component is one or more of an LED light, a display screen, a buzzer and a speaker.

6. The charging reminder circuit according to claim 1, characterized in that: The charging reminder circuit also includes a linear regulator, which is used to step down the battery voltage output by the battery and output it to the power load.

7. A charging reminder device, characterized in that: The charging reminder device comprises the charging reminder circuit according to any one of claims 1 to 6.

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