CN220896527U - DC/DC power supply delay starting circuit powered by thermal battery - Google Patents
DC/DC power supply delay starting circuit powered by thermal battery Download PDFInfo
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- CN220896527U CN220896527U CN202322645999.2U CN202322645999U CN220896527U CN 220896527 U CN220896527 U CN 220896527U CN 202322645999 U CN202322645999 U CN 202322645999U CN 220896527 U CN220896527 U CN 220896527U
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 87
- 239000003990 capacitor Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims 7
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000005676 thermoelectric effect Effects 0.000 description 1
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Abstract
The utility model discloses a DC/DC power supply delay starting circuit powered by a thermal battery, which comprises a voltage stabilizing unit, a first delay unit, a charging unit and a second delay unit, wherein the voltage stabilizing unit, the first delay unit, the charging unit and the second delay unit are connected between the output end of the thermal battery and the enabling end of the DC/DC power supply; the voltage stabilizing unit is used for limiting the output voltage of the thermal battery within a first preset voltage; when the output voltage of the voltage stabilizing unit reaches a second preset voltage, the output of the voltage stabilizing unit charges the charging unit through the first delay unit; when the charged voltage of the charging unit reaches a third preset voltage, the second delay unit enables the charging unit to output a starting voltage signal to the DC/DC power supply enabling end through the second delay unit; the first, second and third preset voltages are sequentially reduced, and the third preset voltage is larger than or equal to the starting voltage of the DC/DC power supply. The utility model can avoid repeated starting of the DC/DC power supply and the powered electric equipment, and protect the DC/DC power supply and the electric equipment.
Description
Technical Field
The utility model relates to the technical field of thermal batteries, in particular to a DC/DC power supply delay starting circuit powered by a thermal battery.
Background
The thermal battery is a device for converting heat energy into electric energy, and the principle is based on thermoelectric effect, when a temperature difference is received, free electrons can be driven by electrons in thermal motion, so that charge difference is generated at two ends of a conductor, a potential difference is formed, and current is generated. The thermal battery may be used in conjunction with a DC/DC power supply to power certain electronic systems.
When the thermal battery is applied, no output voltage exists before the thermal battery is activated, the output voltage starts to be output after the thermal battery is activated, but the output voltage is gradually increased in a very short time just after the thermal battery is activated, the output current capacity is very weak, when the output voltage of the thermal battery reaches the DC/DC power supply working voltage, the DC/DC power supply starts to be started with a load, but the output current capacity of the thermal battery just after the thermal battery is activated is insufficient, the thermal battery voltage can be pulled down, when the output voltage of the thermal battery is pulled down to be lower than the DC/DC power supply working voltage, the DC/DC power supply does not work any more, and the thermal battery voltage can be increased again. When the voltage of the thermal battery rises to the working voltage of the DC/DC power supply, the DC/DC power supply works to pull down the voltage of the thermal battery, so that the DC/DC power supply does not work. The DC/DC power supply is repeatedly started, and the electric equipment after the DC/DC power supply is repeatedly started, so that the DC/DC power supply and the electric equipment are easily damaged.
Disclosure of Invention
The utility model aims to provide a DC/DC power supply delay starting circuit powered by a thermal battery, which can avoid repeated starting of the DC/DC power supply and powered electric equipment and protect the DC/DC power supply and the electric equipment.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the DC/DC power supply delay starting circuit for the thermal battery power supply comprises a voltage stabilizing unit, a first delay unit, a charging unit and a second delay unit which are sequentially connected between the output end of the thermal battery and the DC/DC power supply enabling end;
The voltage stabilizing unit is used for limiting the output voltage of the thermal battery within a first preset voltage;
The first delay unit is used for transmitting a voltage signal output by the voltage stabilizing unit to the charging unit through the first delay unit when the voltage of the output end of the voltage stabilizing unit reaches a second preset voltage, and charging the charging unit;
The second delay unit is used for enabling the charging unit to output a voltage signal with a voltage value being the second preset voltage to the DC/DC power supply through the second delay unit when the charged voltage of the charging unit reaches the third preset voltage;
The third preset voltage is greater than or equal to the starting voltage of the DC/DC power supply, the second preset voltage is greater than the third preset voltage, and the first preset voltage is greater than the second preset voltage.
When the power supply is applied, the voltage stabilizing unit can limit the voltage to a safe range in the process of gradually rising the output voltage after the thermal battery is started, and the power supply has the capability of starting a DC/DC power supply later. When the first delay unit is conducted, the delay starting timing of the DC/DC power supply is started, in the charging process of the charging unit, due to the arrangement of the second delay unit, an enabling signal is sent to the DC/DC power supply only when the output voltage of the charging unit reaches the starting voltage level of the DC/DC power supply, and at the moment, the output voltage of the thermal battery is stable, so that the situation that the DC/DC power supply is repeatedly started can not occur any more, and the DC/DC power supply and subsequent electric equipment can be protected.
Optionally, the voltage stabilizing unit includes a triode Q1, a voltage stabilizing tube V1, a resistor R1 and a capacitor C1, where the resistor R1 and the capacitor C1 are connected in series between the dc output ends of the thermal battery, and the connection point of the resistor R1 and the capacitor C1 is connected with the ground end in a reverse direction to the voltage stabilizing tube V1; the collector of the triode Q1 is connected with the positive electrode of the direct current output end of the thermal battery, the emitter serving as the output end of the voltage stabilizing unit is connected with the first delay unit, and the base is connected with the negative electrode of the voltage stabilizing tube V1.
Optionally, the triode Q1 is an NPN tube, and the voltage stabilizing value of the voltage stabilizing tube V1 is 15V. That is, the output voltage of the thermal battery is clamped at a maximum of about 15V.
Optionally, the first delay unit adopts a voltage stabilizing tube V2 with a voltage stabilizing value smaller than the first preset voltage, the negative electrode of the voltage stabilizing tube V2 is used as the input end of the first delay unit to be connected with the emitter of the triode Q1, and the positive electrode of the voltage stabilizing tube V2 is used as the output end of the first delay unit to be connected with the charging unit. When the output voltage of the voltage stabilizing unit reaches the second preset voltage, the voltage stabilizing tube V2 is broken down, and a voltage signal is output to the charging unit.
Optionally, the first delay unit further includes a resistor R3, and two ends of the resistor R3 are respectively connected to the positive electrode of the voltage stabilizing tube V2 and the ground terminal. The resistor R3 is provided for safety reasons for the purpose of forming a loop in cooperation with V2.
Optionally, the charging unit includes a resistor R2 and a capacitor C2 connected in series between the positive electrode of the output end of the first delay unit and the ground end, and a connection point between the resistor R2 and the capacitor C2 is used as the output end of the charging unit and connected to the input end of the second delay unit.
Optionally, the second delay unit includes a voltage stabilizing tube V3 reversely connected between the DC/DC power supply enable terminal and the output terminal of the charging unit. When the voltage on the capacitor C2 in the charging unit reaches the third preset voltage, the voltage stabilizing tube V3 is conducted, and the third preset voltage is set according to the starting voltage of the DC/DC power supply, so that the situation that repeated starting cannot occur in the follow-up process can be guaranteed.
Optionally, the voltage stabilizing value of the voltage stabilizing tube V3 is 10V, and the voltage stabilizing value of the voltage stabilizing tube V2 is 12V.
Advantageous effects
When the utility model is applied, through the arrangement of the voltage stabilizing unit, the first delay unit, the charging unit and the second delay unit, after the thermal battery is activated, no matter whether the voltage of the thermal battery is established or not, the thermal battery needs to start working after the activity of the thermal battery is completely activated, so that the problem that the DC/DC power supply and the electric equipment are repeatedly started due to insufficient output current capacity of the thermal battery although the voltage of the thermal battery is established can be avoided, and the DC/DC power supply and the electric equipment are protected.
Drawings
FIG. 1 shows a schematic representation of an embodiment of the present utility model; wherein: 01-voltage stabilizing unit, 02-charging unit.
Description of the embodiments
Further description is provided below in connection with the drawings and the specific embodiments.
Example 1
The embodiment introduces a DC/DC power supply delay starting circuit powered by a thermal battery, which can avoid repeated starting of power supply and equipment caused by voltage fluctuation before the thermal battery is completely activated, thereby protecting the DC/DC power supply and electric equipment.
The utility model comprises a voltage stabilizing unit 01, a first delay unit, a charging unit 02 and a second delay unit which are sequentially connected between the output end of a thermal battery and the enabling end of a DC/DC power supply.
The voltage stabilizing unit 01 is used for limiting the output voltage of the thermal battery to a safe range, namely, a first preset voltage, and has the capability of starting a DC/DC power supply subsequently.
In the operation process of the circuit of this embodiment, the thermal battery is activated, the output voltage is increased gradually, and when the voltage of the output end of the voltage stabilizing unit 01 reaches the second preset voltage, the voltage signal output by the voltage stabilizing unit is transmitted to the charging unit 02 through the first delay unit, and the charging unit 02 is charged.
In the charging process of the charging unit 02, due to the arrangement of the second delay unit, only when the output voltage of the charging unit 02 reaches the third preset voltage, the charging unit 02 outputs a voltage signal with the voltage value being the second preset voltage to the DC/DC power supply through the second delay unit, and sends an enabling signal to the DC/DC power supply. At this time, the output voltage of the thermal battery is stable, so that the situation that the DC/DC power supply is repeatedly started can not occur any more, and the purpose of protecting the DC/DC power supply and subsequent electric equipment is achieved.
The third preset voltage is greater than or equal to the starting voltage of the DC/DC power supply, the second preset voltage is greater than the third preset voltage, and the first preset voltage is greater than the second preset voltage.
Example 2
As shown in fig. 1, in this embodiment, performance indexes of each device are: the resistor r1=10kΩ, the resistor r2=200kΩ, the resistor r3=200kΩ, the capacitor c1=2.2 uF, the capacitor c2=1uf, the diode v1=15v, the diode v2=12v, the diode v3=10v, and the transistor Q1 may be an NPN transistor of the model MMBT 5551.
The voltage stabilizing unit 01 comprises a triode Q1, a voltage stabilizing tube V1, a resistor R1 and a capacitor C1, wherein the resistor R1 and the capacitor C1 are connected in series between the direct current output end of the thermal battery, and the voltage stabilizing tube V1 is reversely connected between the connecting point of the resistor R1 and the capacitor C1 and the grounding end; the collector of the triode Q1 is connected with the positive electrode of the direct current output end of the thermal battery, the emitter serving as the output end of the voltage stabilizing unit 01 is connected with the first delay unit, and the base is connected with the negative electrode of the voltage stabilizing tube V1.
The triode Q1 adopts an NPN tube, and the voltage stabilizing value of the voltage stabilizing tube V1 is 15V. That is, the output voltage of the thermal battery is clamped at a maximum of about 15V.
The first delay unit adopts a voltage stabilizing tube V2 with a voltage stabilizing value of 12V and smaller than a first preset voltage, the negative electrode of the voltage stabilizing tube V2 is used as the input end of the first delay unit to be connected with the emitter electrode of the triode Q1, and the positive electrode of the voltage stabilizing tube V2 is used as the output end of the first delay unit to be connected with the charging unit. When the output voltage of the voltage stabilizing unit 01 reaches the second preset voltage, the voltage stabilizing tube V2 is broken down, and a voltage signal is output to the charging unit 02.
The first delay unit further comprises a resistor R3, and two ends of the resistor R3 are respectively connected with the positive electrode of the voltage stabilizing tube V2 and the grounding end. The resistor R3 is provided for safety reasons for the purpose of forming a loop in cooperation with V2.
The charging unit 02 comprises a resistor R2 and a capacitor C2 which are connected in series between the positive electrode of the output end of the first delay unit and the grounding end, and a connection point of the resistor R2 and the capacitor C2 is used as the output end of the charging unit 02 and is connected with the input end of the second delay unit.
The second delay unit comprises a voltage stabilizing tube V3 reversely connected between the DC/DC power supply enabling end and the output end of the charging unit 02. When the voltage on the capacitor C2 in the charging unit 02 reaches the third preset voltage 10V, the voltage stabilizing tube V3 is turned on, and the third preset voltage is set according to the starting voltage of the DC/DC power supply, so that the situation that repeated starting cannot occur in the following process can be ensured.
As shown in fig. 1, the working principle of this embodiment is as follows:
After the thermal battery is activated, the output voltage of VIN point rises, the triode Q1, the voltage stabilizing tube V1, the resistor R1 and the capacitor C1 together form a voltage stabilizing unit 01, the direct current output end of the thermal battery is connected with the collector electrode of the triode Q1 and the resistor R1, the direct current input end is connected with the positive electrode of the voltage stabilizing tube V1 and the capacitor C1, the resistor R1 and the capacitor C1 are connected between the direct current output ends of the thermal battery in series, and the negative electrode of the voltage stabilizing tube V1 is reversely connected between the connecting point of the resistor R1 and the capacitor C1 and the grounding end. Because of the arrangement of the voltage stabilizing tube V1, the output voltage of the emitter of the voltage stabilizing tube at the point TP1 is clamped below the breakdown value 15V of the voltage stabilizing tube V1.
The emitter of the triode Q1 is connected with the cathode of the voltage stabilizing tube V2, when the voltage output by the voltage stabilizing unit 01 gradually rises to the breakdown value of the voltage stabilizing tube V2, namely a second preset voltage 12V, a voltage signal is transmitted to the resistor R2 and the capacitor C2 through the voltage stabilizing tube V2.
The resistor R2 and the capacitor C2 are connected in series between the positive electrode of the output end of the first delay unit and the grounding end to form a charging unit 02, and the connection point of the resistor R2 and the capacitor C2 is used as the output end of the charging unit 02 and connected with the negative electrode of the voltage stabilizing tube V3. When the voltage on the capacitor C2 gradually rises to the breakdown value of the voltage regulator V3, that is, the third preset voltage 10V, the voltage signal outputs a voltage start voltage signal to the DC/DC power supply through the voltage regulator V3, so as to enable the DC/DC power supply.
The voltage stabilizing unit, the first delay unit, the charging unit and the second delay unit are arranged and matched, so that when the DC/DC power supply is enabled, the thermal battery is completely activated, and the situation of repeated starting can not occur later, namely, the DC/DC power supply and electric equipment are protected.
The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are all within the protection of the present utility model.
In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, or connected through intermediaries, or communicating between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Claims (8)
1. A DC/DC power supply delay starting circuit powered by a thermal battery is characterized in that: the device comprises a voltage stabilizing unit, a first delay unit, a charging unit and a second delay unit which are sequentially connected between the output end of the thermal battery and the enabling end of the DC/DC power supply;
The voltage stabilizing unit is used for limiting the output voltage of the thermal battery within a first preset voltage;
The first delay unit is used for transmitting a voltage signal output by the voltage stabilizing unit to the charging unit through the first delay unit when the voltage of the output end of the voltage stabilizing unit reaches a second preset voltage, and charging the charging unit;
The second delay unit is used for enabling the charging unit to output a voltage signal with a voltage value being the second preset voltage to the DC/DC power supply through the second delay unit when the charged voltage of the charging unit reaches the third preset voltage;
The third preset voltage is greater than or equal to the starting voltage of the DC/DC power supply, the second preset voltage is greater than the third preset voltage, and the first preset voltage is greater than the second preset voltage.
2. The battery-powered DC/DC power supply delayed start circuit of claim 1, wherein: the voltage stabilizing unit comprises a triode Q1, a voltage stabilizing tube V1, a resistor R1 and a capacitor C1, wherein the resistor R1 and the capacitor C1 are connected in series between the direct current output end of the thermal battery, and the voltage stabilizing tube V1 is reversely connected between the connecting point of the resistor R1 and the capacitor C1 and the grounding end; the collector of the triode Q1 is connected with the positive electrode of the direct current output end of the thermal battery, the emitter serving as the output end of the voltage stabilizing unit is connected with the first delay unit, and the base is connected with the negative electrode of the voltage stabilizing tube V1.
3. The battery-powered DC/DC power supply delayed start circuit of claim 2, wherein: the triode Q1 adopts an NPN tube, and the voltage stabilizing value of the voltage stabilizing tube V1 is 15V.
4. A battery powered DC/DC power supply delayed start circuit as defined in claim 3, wherein: the first delay unit adopts a voltage stabilizing tube V2 with a voltage stabilizing value smaller than the first preset voltage, the negative electrode of the voltage stabilizing tube V2 is used as the input end of the first delay unit to be connected with the emitter electrode of the triode Q1, and the positive electrode of the voltage stabilizing tube V2 is used as the output end of the first delay unit to be connected with the charging unit.
5. The battery-powered DC/DC power supply delayed start circuit of claim 4, wherein: the first delay unit further comprises a resistor R3, and two ends of the resistor R3 are respectively connected with the positive electrode of the voltage stabilizing tube V2 and the grounding end.
6. The battery-powered DC/DC power supply delayed start circuit of claim 5, wherein: the charging unit comprises a resistor R2 and a capacitor C2 which are connected in series between the positive electrode of the output end of the first delay unit and the grounding end, wherein the connection point of the resistor R2 and the capacitor C2 is used as the output end of the charging unit and is connected with the input end of the second delay unit.
7. The battery powered DC/DC power supply delayed start circuit of claim 6, wherein: the second delay unit comprises a voltage stabilizing tube V3 reversely connected between the DC/DC power supply enabling end and the output end of the charging unit, when the voltage on the capacitor C2 in the charging unit reaches the third preset voltage, the voltage stabilizing tube V3 is conducted, the third preset voltage is set according to the starting voltage of the DC/DC power supply, and the situation that repeated starting cannot occur in the follow-up process can be guaranteed.
8. The battery powered DC/DC power supply delayed start circuit of claim 7, wherein: the voltage stabilizing value of the voltage stabilizing tube V3 is 10V, and the voltage stabilizing value of the voltage stabilizing tube V2 is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322645999.2U CN220896527U (en) | 2023-09-28 | 2023-09-28 | DC/DC power supply delay starting circuit powered by thermal battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322645999.2U CN220896527U (en) | 2023-09-28 | 2023-09-28 | DC/DC power supply delay starting circuit powered by thermal battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220896527U true CN220896527U (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322645999.2U Active CN220896527U (en) | 2023-09-28 | 2023-09-28 | DC/DC power supply delay starting circuit powered by thermal battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220896527U (en) |
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2023
- 2023-09-28 CN CN202322645999.2U patent/CN220896527U/en active Active
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