CN216981561U - Lithium cell low pressure suggestion circuit - Google Patents
Lithium cell low pressure suggestion circuit Download PDFInfo
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- CN216981561U CN216981561U CN202220102323.1U CN202220102323U CN216981561U CN 216981561 U CN216981561 U CN 216981561U CN 202220102323 U CN202220102323 U CN 202220102323U CN 216981561 U CN216981561 U CN 216981561U
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Abstract
The utility model discloses a low-voltage prompt circuit of a lithium battery, which comprises a power module, a voltage control module, a charging prompt module, a charging interface and a detection module, wherein the charging interface is connected with the detection module; the control module is connected with the voltage control module, the voltage control module is connected with the power module, the charging prompt module and the charging interface are connected with the control module and the power module, and the detection module is connected with the power module; the control module comprises a power prompt lamp, the power prompt lamp comprises a low-voltage prompt lamp, and the low-voltage prompt lamp flickers to prompt when the lithium battery is at low voltage; the low pressure warning light scintillation suggestion when the lithium cell low pressure for the voltage of lithium cell flickers when being in predetermined low pressure alarm value, not only can accurately embody the battery electric quantity value, avoids the unable normal use of battery and leads to the battery to damage because insufficient voltage, still makes to provide more obvious suggestion for operating personnel, and the operating personnel of being convenient for discovers that the battery electric quantity is not enough and charges.
Description
Technical Field
The utility model relates to the field of manufacturing and designing of lithium batteries, in particular to a low-voltage prompting circuit of a lithium battery.
Background
The lithium battery is widely applied to the life of people, such as products of a charger, a flashlight and the like; the rechargeable performance of the lithium battery enables a product carrying the lithium battery to be repeatedly used, so that the lithium battery has longer service life; generally speaking, an indicator light is used for prompting real-time electric quantity when the lithium battery is used, standby and charged; generally, each indicator light corresponds to a corresponding electric quantity interval of the lithium battery, but cannot reflect the detailed value of the current electric quantity in detail; for example, when the electric quantity value of the lithium battery is in the lowest interval, it represents that the lithium battery is about to be out of power, but the lowest interval also comprises the highest value and the lowest value, the lithium battery can be used for a certain time when the electric quantity is in the highest value of the interval, the lithium battery needs to be tightened for charging when the electric quantity is in the lowest value of the interval, otherwise, the lithium battery is easy to damage due to power shortage; however, if the battery state is only indicated by the indicator light representing the interval, the accurate battery state cannot be provided for the user; meanwhile, the normally-on indicator light cannot give clear prompt to an operator, and the battery power condition is easy to be mistaken.
Disclosure of Invention
The utility model overcomes the defects of the prior art, and provides the lithium battery low-voltage prompting circuit which has the advantages of simple structure, reasonable design, battery protection, obvious prompt and accurate representation of the battery electric quantity value.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
a low-voltage prompt circuit of a lithium battery comprises a power module, a voltage control module, a charging prompt module, a charging interface and a detection module; the control module is connected with the voltage control module, the voltage control module is connected with the power module, the charging prompt module and the charging interface are connected with the control module and the power module, and the detection module is connected with the power module; the control module comprises a power prompting lamp, the power prompting lamp comprises a low-voltage prompting lamp, and the lithium battery twinkles for prompting at low voltage.
Further, the control module comprises a control chip U1, a key switch S1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a light emitting diode D1, a light emitting diode D2, a light emitting diode D3 and a light emitting diode D4;
a No. 1 pin of the control chip U1 is connected with one end of the key switch S1, and the other end of the key switch S1 is grounded; a pin No. 2 of the control chip U1 is connected with one end of the light-emitting diode D4, and the other end of the light-emitting diode D4 is connected with one end of the resistor R1; the No. 3 pin of the control chip U1 is grounded; a pin 4 of the control chip U1 is connected with the other end of the resistor R1, one end of the capacitor C1, a pin 7 of the control chip U1, a pin 10 of the control chip U1 and one end of the resistor R4, and the other end of the capacitor C1 is grounded; a No. 6 pin of the control chip U1 is connected with one end of the resistor R2 and one end of the resistor R3, and the other end of the resistor R3 is grounded; the No. 11 pin of the control chip U1 is grounded; a No. 12 pin of the control chip U1 is connected with one end of the light-emitting diode D1; a No. 13 pin of the control chip U1 is connected with one end of the light-emitting diode D2; a No. 14 pin of the control chip U1 is connected with one end of the light-emitting diode D3; the other end of the resistor R4 is connected to the other end of the led D1, the other end of the led D2, and the other end of the led D3.
Further, the voltage control module comprises a field effect transistor Q1, a field effect transistor Q2, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a light emitting diode D5 and a light emitting diode D6;
the drain electrode of the field effect transistor Q1 is connected with one end of a light emitting diode D5, the other end of the light emitting diode D5 is connected with one end of a resistor R7, and the other end of the resistor R7 is grounded; the grid of the field effect transistor Q1 is connected with one end of the resistor R5 and one end of the resistor R6, and the other end of the resistor R5 is connected with a No. 9 pin of the control chip U1;
the drain electrode of the field effect transistor Q2 is connected with one end of a light emitting diode D6, the other end of the light emitting diode D6 is connected with one end of a resistor R10, and the other end of the resistor R10 is grounded; the grid of the field effect transistor Q2 is connected with one end of the resistor R8 and one end of the resistor R9, and the other end of the resistor R8 is connected with a No. 8 pin of the control chip U1.
Further, the power supply module comprises a battery BT1, a power supply chip U2, a resistor R11, a resistor R12, a resistor R13 and a capacitor C2;
the No. 1 pin of the power chip U2 is connected with the No. 5 pin of the control chip U1; the No. 2 pin of the power chip U2 is grounded; a pin 3 of the power chip U2 is connected with the positive electrode of the battery BT1, the source electrode of the field-effect tube Q1, the source electrode of the field-effect tube Q2, the other end of the resistor R6 and the other end of the resistor R9; a No. 4 pin of the power chip U2 is connected with one end of the resistor R12, one end of the resistor R13, one end of the capacitor C2 and the other end of the resistor R2; the other end of the resistor R12 is connected with the charging prompt module; the negative electrode of the battery BT1 was grounded;
a No. 6 pin of the power chip U2 is connected with one end of the resistor R11, and the other end of the resistor R11 is grounded;
the charging interface comprises an interface JS1, and the anode of the interface JS1 is connected with the other end of the resistor R13; the negative electrode of the interface JS1 is connected with the other end of the capacitor C2 and is grounded.
Further, the light emitting diode D1, the light emitting diode D2, the light emitting diode D3 and the light emitting diode D4 are electric quantity prompting lamps, and the light emitting diode D1 is a low-voltage prompting lamp, and the low-voltage prompting lamp flickers when the lithium battery is at low voltage.
The utility model has the beneficial effects that:
the low-voltage prompting device comprises a low-voltage prompting lamp, wherein a lithium battery flashes for prompting when the lithium battery is at low voltage; make the voltage of lithium cell flash when being in predetermined low pressure alarm value, not only can accurately embody the battery electric quantity value, avoid the unable normal use of battery and lead to the battery to damage because of insufficient voltage, still make and provide more obvious suggestion for operating personnel, the operating personnel of being convenient for discovers that the battery electric quantity is not enough and charges.
The utility model has 4 sections of electric quantity display, and the flashing prompt function is added at low voltage: when the low-voltage indicator lamp is detected to be output by a preset value, the low-voltage indicator lamp flickers for prompting; the prompt numerical value of the utility model is more precise.
Drawings
Fig. 1 is a block diagram of the present invention.
Fig. 2 is an overall circuit diagram of the present invention.
Fig. 3 is a circuit diagram at the control module.
Fig. 4 is a circuit diagram at the voltage control module.
Fig. 5 is a circuit diagram of the charging prompting module, the charging interface and the detecting module.
Detailed Description
The utility model is further described with reference to the following figures and specific examples. It should be noted that the examples are only for specifically illustrating the present invention, and the purpose thereof is to make the technical solution of the present invention better understood by those skilled in the art, and should not be construed as limiting the present invention.
Example (b):
a low-voltage prompt circuit of a lithium battery comprises a power module, a voltage control module, a charging prompt module, a charging interface and a detection module; the control module is connected with the voltage control module, the voltage control module is connected with the power module, the charging prompt module and the charging interface are connected with the control module and the power module, and the detection module is connected with the power module; the control module comprises a power prompting lamp, the power prompting lamp comprises a low-voltage prompting lamp, and the lithium battery twinkles for prompting at low voltage.
Further, the control module comprises a control chip U1, a key switch S1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a light emitting diode D1, a light emitting diode D2, a light emitting diode D3 and a light emitting diode D4;
a No. 1 pin of the control chip U1 is connected with one end of the key switch S1, and the other end of the key switch S1 is grounded; a pin No. 2 of the control chip U1 is connected with one end of the light-emitting diode D4, and the other end of the light-emitting diode D4 is connected with one end of the resistor R1; the No. 3 pin of the control chip U1 is grounded; a pin 4 of the control chip U1 is connected with the other end of the resistor R1, one end of the capacitor C1, a pin 7 of the control chip U1, a pin 10 of the control chip U1 and one end of the resistor R4, and the other end of the capacitor C1 is grounded; a No. 6 pin of the control chip U1 is connected with one end of the resistor R2 and one end of the resistor R3, and the other end of the resistor R3 is grounded; the No. 11 pin of the control chip U1 is grounded; a No. 12 pin of the control chip U1 is connected with one end of the light-emitting diode D1; a No. 13 pin of the control chip U1 is connected with one end of the light-emitting diode D2; a No. 14 pin of the control chip U1 is connected with one end of the light-emitting diode D3; the other end of the resistor R4 is connected to the other end of the led D1, the other end of the led D2, and the other end of the led D3.
Further, the voltage control module comprises a field effect transistor Q1, a field effect transistor Q2, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a light emitting diode D5 and a light emitting diode D6;
the drain electrode of the field effect transistor Q1 is connected with one end of a light emitting diode D5, the other end of the light emitting diode D5 is connected with one end of a resistor R7, and the other end of the resistor R7 is grounded; the grid electrode of the field effect transistor Q1 is connected with one end of the resistor R5 and one end of the resistor R6, and the other end of the resistor R5 is connected with a No. 9 pin of the control chip U1;
the drain electrode of the field effect transistor Q2 is connected with one end of a light emitting diode D6, the other end of the light emitting diode D6 is connected with one end of a resistor R10, and the other end of the resistor R10 is grounded; the grid of the field effect transistor Q2 is connected with one end of the resistor R8 and one end of the resistor R9, and the other end of the resistor R8 is connected with a No. 8 pin of the control chip U1.
Further, the power supply module comprises a battery BT1, a power supply chip U2, a resistor R11, a resistor R12, a resistor R13 and a capacitor C2;
the No. 1 pin of the power chip U2 is connected with the No. 5 pin of the control chip U1; the No. 2 pin of the power chip U2 is grounded; a pin 3 of the power chip U2 is connected with the positive electrode of the battery BT1, the source electrode of the field-effect tube Q1, the source electrode of the field-effect tube Q2, the other end of the resistor R6 and the other end of the resistor R9; a pin No. 4 of the power chip U2 is connected with one end of the resistor R12, one end of the resistor R13, one end of the capacitor C2 and the other end of the resistor R2; the other end of the resistor R12 is connected with the charging prompt module; the negative electrode of the battery BT1 is grounded;
a No. 6 pin of the power chip U2 is connected with one end of the resistor R11, and the other end of the resistor R11 is grounded;
the charging interface comprises an interface JS1, and the anode of the interface JS1 is connected with the other end of the resistor R13; the negative electrode of the interface JS1 is connected to the other end of the capacitor C2 and is grounded.
Further, the light emitting diode D1, the light emitting diode D2, the light emitting diode D3 and the light emitting diode D4 are electric quantity prompting lamps, and the light emitting diode D1 is a low-voltage prompting lamp, and the low-voltage prompting lamp flickers when the lithium battery is at low voltage.
The utility model has 4 sections of electric quantity display, and a flashing prompt function is added at low voltage: when the output value of the low-voltage indicator lamp is detected to be 1HZ, the low-voltage indicator lamp flickers for prompting; the prompt numerical value of the utility model is more precise.
The electric quantity indication of the utility model is as follows: (1) when the working voltage is more than 3.6V, the light-emitting diodes D1, D2, D3 and D4 are bright; when the working voltage is 3.3V-3.6V, the light-emitting diode D1, the light-emitting diode D2 and the light-emitting diode D3 are bright; when the working voltage is 3.0V-3.3V, the light-emitting diode D1 and the light-emitting diode D2 are bright; when the working voltage is 2.8V-3.0V, the light-emitting diode D1 is bright; when the working voltage is less than 2.8V, the light-emitting diode D1 flickers.
In the present invention, the battery voltage is detected by a detection module; when the voltage of the battery changes, the power chip U2 transmits a corresponding signal to the voltage control module, the signal is stabilized through the voltage control module, the control module receives the signal, and finally an instruction is given to the electric quantity prompting lamp; the charging module and the charging prompt module charge and display the charging state of the utility model, so that the real-time state of the utility model is further embodied, and operators can know the detailed condition of the utility model conveniently.
It should be noted that other technical solutions of the present invention all belong to the prior art, and therefore are not described in detail.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (5)
1. A lithium battery low-voltage prompt circuit is characterized by comprising a power module, a voltage control module, a charging prompt module, a charging interface and a detection module; the control module is connected with the voltage control module, the voltage control module is connected with the power module, the charging prompt module and the charging interface are connected with the control module and the power module, and the detection module is connected with the power module; the control module comprises a power prompt lamp, the power prompt lamp comprises a low-voltage prompt lamp, and the flash prompt is performed when the lithium battery is at low voltage.
2. The lithium battery low-voltage prompt circuit as claimed in claim 1, wherein the control module comprises a control chip U1, a key switch S1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a light emitting diode D1, a light emitting diode D2, a light emitting diode D3 and a light emitting diode D4;
a No. 1 pin of the control chip U1 is connected with one end of the key switch S1, and the other end of the key switch S1 is grounded; a pin No. 2 of the control chip U1 is connected with one end of the light-emitting diode D4, and the other end of the light-emitting diode D4 is connected with one end of the resistor R1; the No. 3 pin of the control chip U1 is grounded; a pin 4 of the control chip U1 is connected with the other end of the resistor R1, one end of the capacitor C1, a pin 7 of the control chip U1, a pin 10 of the control chip U1 and one end of the resistor R4, and the other end of the capacitor C1 is grounded; a No. 6 pin of the control chip U1 is connected with one end of the resistor R2 and one end of the resistor R3, and the other end of the resistor R3 is grounded; the No. 11 pin of the control chip U1 is grounded; a No. 12 pin of the control chip U1 is connected with one end of the light-emitting diode D1; a No. 13 pin of the control chip U1 is connected with one end of the light-emitting diode D2; a No. 14 pin of the control chip U1 is connected with one end of the light-emitting diode D3; the other end of the resistor R4 is connected to the other end of the led D1, the other end of the led D2, and the other end of the led D3.
3. The lithium battery low-voltage prompt circuit as claimed in claim 1, wherein the voltage control module comprises a field-effect transistor Q1, a field-effect transistor Q2, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a light-emitting diode D5 and a light-emitting diode D6;
the drain electrode of the field effect transistor Q1 is connected with one end of a light emitting diode D5, the other end of the light emitting diode D5 is connected with one end of a resistor R7, and the other end of the resistor R7 is grounded; the grid of the field effect transistor Q1 is connected with one end of the resistor R5 and one end of the resistor R6, and the other end of the resistor R5 is connected with a No. 9 pin of the control chip U1;
the drain electrode of the field effect transistor Q2 is connected with one end of a light-emitting diode D6, the other end of the light-emitting diode D6 is connected with one end of a resistor R10, and the other end of the resistor R10 is grounded; the grid of the field effect transistor Q2 is connected with one end of the resistor R8 and one end of the resistor R9, and the other end of the resistor R8 is connected with a No. 8 pin of the control chip U1.
4. The lithium battery low-voltage prompt circuit as claimed in claim 1, wherein the power supply module comprises a battery BT1, a power supply chip U2, a resistor R11, a resistor R12, a resistor R13 and a capacitor C2;
the No. 1 pin of the power chip U2 is connected with the No. 5 pin of the control chip U1; a No. 2 pin of the power chip U2 is grounded; a pin 3 of the power chip U2 is connected with the positive electrode of the battery BT1, the source electrode of the field-effect tube Q1, the source electrode of the field-effect tube Q2, the other end of the resistor R6 and the other end of the resistor R9; a No. 4 pin of the power chip U2 is connected with one end of the resistor R12, one end of the resistor R13, one end of the capacitor C2 and the other end of the resistor R2; the other end of the resistor R12 is connected with the charging prompt module; the negative electrode of the battery BT1 is grounded;
a No. 6 pin of the power chip U2 is connected with one end of the resistor R11, and the other end of the resistor R11 is grounded;
the charging interface comprises an interface JS1, and the anode of the interface JS1 is connected with the other end of the resistor R13; the negative electrode of the interface JS1 is connected to the other end of the capacitor C2 and is grounded.
5. The lithium battery low-voltage prompting circuit as claimed in claim 2, wherein the light emitting diodes D1, D2, D3 and D4 are power prompting lamps, and the light emitting diode D1 is a low-voltage prompting lamp, and the low-voltage prompting lamp flashes to prompt when the lithium battery is at low voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220102323.1U CN216981561U (en) | 2022-01-17 | 2022-01-17 | Lithium cell low pressure suggestion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220102323.1U CN216981561U (en) | 2022-01-17 | 2022-01-17 | Lithium cell low pressure suggestion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216981561U true CN216981561U (en) | 2022-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220102323.1U Active CN216981561U (en) | 2022-01-17 | 2022-01-17 | Lithium cell low pressure suggestion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216981561U (en) |
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2022
- 2022-01-17 CN CN202220102323.1U patent/CN216981561U/en active Active
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