Starting-up circuit and standby battery

Abstract

The utility model provides a power-on circuit and a standby battery, and relates to the field of battery control. The startup circuit comprises an activation unit, an isolation conduction unit and a latch unit, the activation unit is used for controlling on-off of the isolation conduction unit under the action of input voltage, the isolation conduction unit is used for outputting a second latch control signal to the latch unit during conduction, and the latch unit is used for outputting a startup signal under the action of the first latch control signal and the second latch control signal. An activation unit, an isolation conduction unit and a latch unit are arranged in a startup circuit, so that the isolation conduction unit can output a second latch control signal to the latch unit when being conducted, and the latch unit can output a startup signal under the action of a first latch control signal and the second latch control signal. The power-on voltage can be stably provided for the load, so that the power-on stability and the subsequent working performance of the load are ensured.

Description

Technical Field

[0001] The utility model relates to the field of battery control, and more particularly, to a startup circuit and a backup battery. Background Art

[0002] A communication backup battery is the main backup power supply for a communication system. When the main power supply (such as mains electricity) fails or there is a power outage, the backup battery can quickly start up and provide continuous power supply for communication equipment to ensure the normal operation of the communication equipment.

[0003] In the prior art, when it is necessary for the communication backup battery to start working, a startup voltage is directly provided to the communication backup battery to enable the communication backup battery to start up and work.

[0004] However, this startup method of directly providing a startup voltage to the communication backup battery cannot adapt to unstable factors such as voltage fluctuations, which affects the startup stability of the communication backup battery and its subsequent working performance. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a startup circuit and a backup battery that can stably provide a startup voltage to the backup battery to ensure the startup stability of the backup battery and its subsequent working performance.

[0006] The utility model provides a technical solution:

[0007] In a first aspect, the utility model provides a startup circuit, comprising: an activation unit, an isolation conduction unit, and a latching unit;

[0008] The input end of the activation unit is used to access the input voltage of the power supply, the output end of the activation unit is connected to the input end of the isolation conduction unit, the output end of the isolation conduction unit is connected to the first input end of the latching unit, the second input end of the latching unit is used to access a first latching control signal, and the output end of the latching unit is used to output a startup signal;

[0009] The activation unit is used to control the on-off of the isolation conduction unit under the action of the input voltage, the isolation conduction unit is used to output a second latching control signal to the latching unit when it is conducting, and the latching unit is used to output a startup signal under the action of the first latching control signal and the second latching control signal.

[0010] In a possible implementation manner, the startup circuit further comprises: a protection unit;

[0011] The input end of the protection unit is used to access the input voltage, and the output end of the protection unit is connected to the input end of the activation unit.

[0012] In a possible implementation, the activation unit includes a first voltage dividing module, a second voltage dividing module, and a voltage regulator;

[0013] The first end of the first voltage dividing module is used to connect to an input voltage, the second end of the first voltage dividing module is connected to the first end of the voltage regulator, and the third end of the first voltage dividing module is connected to the second end of the voltage regulator;

[0014] The first end of the second voltage dividing module is used to connect to an input voltage, the second end of the second voltage dividing module is connected to the third end of the voltage regulator, the third end of the second voltage dividing module is connected to the first input end of the isolation conduction unit, and the fourth end of the second voltage dividing module is connected to the second input end of the isolation conduction unit.

[0015] In a possible implementation, the first voltage dividing module includes: a first resistor, a second resistor, and a first capacitor;

[0016] One end of the first resistor is used to connect to an input voltage, the other end of the first resistor is connected to one end of the second resistor, one end of the first capacitor, and the first end of the voltage regulator, the other end of the second resistor is connected to the other end of the first capacitor and the second end of the voltage regulator, and the other end of the second resistor is also grounded.

[0017] In a possible implementation, the second voltage dividing module includes: a third resistor, a fourth resistor, and a second diode;

[0018] One end of the third resistor is used to connect to an input voltage, the other end of the third resistor is connected to one end of the fourth resistor, the negative electrode of the second diode, and the first input end of the isolation conduction unit, and the positive electrode of the second diode is grounded;

[0019] The other end of the fourth resistor is connected to the third end of the voltage regulator and the second input end of the isolation conduction unit.

[0020] In a possible implementation, the isolation conduction unit includes: an optoelectronic isolator switch;

[0021] The first input end of the optoelectronic isolator switch is connected to the output end of the activation unit, the second input end of the optoelectronic isolator switch is used to connect to a first auxiliary power supply, and the output end of the optoelectronic isolator switch is connected to the first input end of the latching unit.

[0022] In a possible implementation, the latching unit includes: an oscillation module and a trigger module;

[0023] The first end of the oscillation module is connected to the output end of the isolation conduction unit, the second end of the oscillation module is connected to the first end of the trigger module, and the third end of the oscillation module is connected to the second end of the trigger module;

[0024] The third end of the trigger module is used to access the first latch control signal, and the fourth end of the trigger module is used to output a power-on signal.

[0025] In a possible implementation, the oscillation module includes a second capacitor and a fifth resistor;

[0026] One end of the second capacitor is connected to the output end of the isolation conduction unit, one end of the fifth resistor, the first end of the trigger module, and the second end of the trigger module;

[0027] The other end of the second capacitor is connected to the other end of the fifth resistor, and the other end of the second capacitor is also grounded.

[0028] In a possible implementation, the trigger module includes a trigger;

[0029] The first end of the trigger is connected to one end of the second capacitor, the output end of the isolation conduction unit, one end of the fifth resistor, and the second end of the trigger;

[0030] The third end of the trigger is used to access the first latch control signal, and the fourth end of the trigger is used to output a power-on signal.

[0031] In a second aspect, the present invention provides a backup battery, including the power-on circuit according to any one of the first aspects and a power supply.

[0032] The beneficial effects of the power-on circuit provided by the present invention are as follows: By setting an activation unit, an isolation conduction unit, and a latch unit in the power-on circuit, the activation unit can control the on-off of the isolation conduction unit under the action of the input voltage, and the isolation conduction unit can output a second latch control signal to the latch unit when it is conducting, so that the latch unit can output a power-on signal under the action of the first latch control signal and the second latch control signal. It can stably provide a power-on voltage to the load to ensure the power-on stability and subsequent working performance of the load. At the same time, it can also control the process of providing the power-on voltage to the load through the first latch control signal, accurately control the application time of the power-on voltage, ensure that a stable power-on voltage is provided to the load at an appropriate time, ensure that the load starts according to a predetermined timing, and avoid possible damage to the load caused by voltage fluctuations. Description of the Drawings

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0034] Figure 1 A schematic structural diagram of a power-on circuit provided by an embodiment of the present invention;

[0035] Figure 2 Another schematic structural diagram of a power-on circuit provided by an embodiment of the present invention;

[0036] Figure 3 A schematic structural diagram of an activation unit in a power-on circuit provided by an embodiment of the present invention;

[0037] Figure 4 A schematic structural diagram of a first voltage division module in a power-on circuit provided by an embodiment of the present invention

[0038] Figure 5 A schematic structural diagram of a second voltage division module in a power-on circuit provided by an embodiment of the present invention;

[0039] Figure 6 A schematic structural diagram of an isolation conduction unit in a power-on circuit provided by an embodiment of the present invention;

[0040] Figure 7 A schematic structural diagram of a latching unit in a power-on circuit provided by an embodiment of the present invention;

[0041] Figure 8 A schematic structural diagram of an oscillation module in a power-on circuit provided by an embodiment of the present invention;

[0042] Figure 9 A schematic structural diagram of a trigger module in a power-on circuit provided by an embodiment of the present invention;

[0043] Figure 10 Another schematic structural diagram of a power-on circuit provided by an embodiment of the present invention;

[0044] Figure 11 A schematic structural diagram of a backup battery provided by an embodiment of the present invention.

[0045] Icons: Input voltage Vin; First latch control signal Input1; Power-on signal Vout; Second latch control signal Input2; First diode D1; First resistor R1; Second resistor R2; First capacitor C1; Third resistor R3; Fourth resistor R4; Second diode D2; First auxiliary power supply P3V3; Second capacitor C2; Fifth resistor R5; Sixth resistor R6; Seventh resistor R7; Third capacitor C3. Detailed implementation

[0046] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Components of the embodiments of the present utility model described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations.

[0047] Therefore, the detailed description of the embodiments of the present utility model provided in the drawings below is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0048] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0049] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0050] In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0051] In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0052] In the prior art, when a communication backup battery needs to start working, a startup voltage is usually directly provided to the communication backup battery to enable the communication backup battery to start working.

[0053] However, this startup method of directly providing a startup voltage to the communication backup battery cannot apply unstable factors such as voltage fluctuations, which affects the startup stability of the backup battery and its subsequent working performance.

[0054] Based on the above problems, an embodiment of the present application proposes a startup circuit. By arranging an activation unit, an isolation conduction unit, and a latching unit in the startup circuit, the activation unit can control the on / off of the isolation conduction unit under the action of an input voltage, and the isolation conduction unit can output a second latching control signal to the latching unit when conducting, so that the latching unit can output a startup signal under the action of the first latching control signal and the second latching control signal. It can stably provide a startup voltage to the load to ensure the startup stability of the load and its subsequent working performance.

[0055] Figure 1 It is a schematic structural diagram of a startup circuit provided by an embodiment of the present utility model.

[0056] Please refer to Figure 1 , this embodiment provides a startup circuit. The startup circuit provided in this embodiment includes: an activation unit, an isolation conduction unit, and a latching unit.

[0057] The input end of the activation unit is used to access the input voltage Vin of the power supply. The output end of the activation unit is connected to the input end of the isolation conduction unit. The output end of the isolation conduction unit is connected to the first input end of the latching unit. The second input end of the latching unit is used to access the first latching control signal Input1. The output end of the latching unit is used to output the startup signal Vout.

[0058] The activation unit is used to control the on / off of the isolation conduction unit under the action of the input voltage Vin. The isolation conduction unit is used to output the second latch control signal Input2 to the latch unit when it is conducting. The latch unit is used to output the power-on signal Vout under the action of the first latch control signal Input1 and the second latch control signal Input2.

[0059] Optionally, the activation unit is used to connect the input voltage Vin, and after the input voltage Vin is connected, in combination with the preset voltage connection condition, it judges whether the isolation control unit can be conducted. If the input voltage Vin meets the preset voltage connection condition, it can be determined that the current input voltage Vin is a stable voltage, and then the isolation conduction unit is controlled to conduct. Among them, the input voltage can be an external activation voltage pulse signal, usually in the voltage range of 45 - 60V, and the duration is 100ms.

[0060] Optionally, the isolation conduction unit may include a switch to be turned on and off under the control of the activation unit, and when it is conducting, output the second latch control signal Input2 to the latch unit.

[0061] Optionally, the latch unit is used to receive the first latch control signal Input1 and the second latch control signal Input2, and output the power-on signal Vout under the action of the first latch control signal Input1 and the second latch control signal Input2.

[0062] Optionally, the first latch control signal Input1 is used to control the operation of the power-on circuit provided in this embodiment.

[0063] That is to say, the power-on circuit provided in this embodiment outputs a power-on signal under the combined action of the first latch control signal Input1 and the second latch control signal Input2 to drive the load connected to the power-on circuit to power on. After the load powers on, the power-on circuit can be controlled whether to continue to output the power-on signal by controlling the first latch control signal Input1. Among them, the load can be a backup battery.

[0064] In this embodiment, by arranging an activation unit, an isolation conduction unit, and a latching unit in the power-on circuit, the activation unit can control the on / off of the isolation conduction unit under the action of the input voltage, and the isolation conduction unit can output a second latching control signal to the latching unit when conducting, so that the latching unit can output a power-on signal under the action of the first latching control signal and the second latching control signal. It can stably provide a power-on voltage to the load to ensure the power-on stability and subsequent working performance of the load. At the same time, it can also control the process of providing the power-on voltage to the load through the first latching control signal, accurately control the application time of the power-on voltage, ensure to provide a stable power-on voltage to the load at an appropriate time, ensure that the load starts according to the predetermined timing, and avoid the possible damage caused by voltage fluctuations to the load.

[0065] Figure 2 It is another structural schematic diagram of the power-on circuit provided by the embodiment of the present invention.

[0066] In a possible implementation manner, with reference to Figure 2 as shown, on the basis of Figure 1 , the power-on circuit further includes: a protection unit.

[0067] The input end of the protection unit is used to access the input voltage Vin, and the output end of the protection unit is connected to the input end of the activation unit.

[0068] Optionally, the protection unit may include a first diode D1, and the first diode D1 may be a Schottky diode to prevent the reverse connection of the input voltage Vin and the activation unit, thereby ensuring the stability and safety of the power-on voltage provided by this embodiment.

[0069] Figure 3 It is a structural schematic diagram of the activation unit in the power-on circuit provided by the embodiment of the present invention.

[0070] In a possible implementation manner, with reference to Figure 3 as shown, on the basis of Figure 1 , the activation unit includes a first voltage division module, a second voltage division module, and a voltage regulator.

[0071] The first end of the first voltage division module is used to access the input voltage Vin, the second end of the first voltage division module is connected to the first end of the voltage regulator, and the third end of the first voltage division module is connected to the second end of the voltage regulator.

[0072] The first end of the second voltage division module is used to access the input voltage Vin, the second end of the second voltage division module is connected to the third end of the voltage regulator, the third end of the second voltage division module is connected to the first input end of the isolation conduction unit, and the fourth end of the second voltage division module is connected to the second input end of the isolation conduction unit.

[0073] Optionally, the voltage regulator can be an adjustable voltage regulator for stably controlling the voltage so that the output voltage remains within a set range.

[0074] Optionally, the first voltage dividing module and the second voltage dividing module are used to divide the input voltage Vin so that the activation unit provided in this embodiment can process the input voltage Vin. When it is necessary to output the power-on signal Vout, a stable voltage difference is generated and output to the isolation conduction unit.

[0075] Figure 4 FIG. is a schematic structural diagram of the first voltage dividing module in the power-on circuit provided by the embodiment of the present invention.

[0076] In a possible implementation manner, with reference to Figure 4 shown, on the basis of Figure 3 , the first voltage dividing module includes: a first resistor R1, a second resistor R2, and a first capacitor C1.

[0077] One end of the first resistor R1 is used to connect to the input voltage Vin. The other end of the first resistor R1 is connected to one end of the second resistor R2, one end of the first capacitor C1, and the first end of the voltage regulator. The other end of the second resistor R2 is connected to the other end of the first capacitor C1 and the second end of the voltage regulator. The other end of the second resistor R2 is also grounded.

[0078] Optionally, one end of the first resistor R1 is also connected to the first end of the second voltage dividing module. The first resistor R1 and the second resistor R2 are voltage dividing resistors. When it is necessary to output the power-on signal Vout, the input voltage Vin is divided by the first resistor R1 and the second resistor R2 and filtered by the first capacitor C1, and then output to the first end of the voltage regulator, so that the first end of the voltage regulator can obtain a stable voltage, thereby being able to stably provide a power-on voltage to the load to ensure the power-on stability of the load and subsequent working performance.

[0079] Figure 5 FIG. is a schematic structural diagram of the second voltage dividing module in the power-on circuit provided by the embodiment of the present invention.

[0080] In a possible implementation manner, with reference to Figure 5 shown, on the basis of Figure 4 , the second voltage dividing module includes: a third resistor R3, a fourth resistor R4, and a second diode D2.

[0081] One end of the third resistor R3 is used to connect to the input voltage Vin. The other end of the third resistor R3 is connected to one end of the fourth resistor R4, the negative electrode of the second diode D2, and the first input end of the isolation conduction unit. The positive electrode of the second diode D2 is grounded.

[0082] The other end of the fourth resistor R4 is connected to the third terminal of the voltage regulator and the second input terminal of the isolation conduction unit.

[0083] Optionally, one end of the third resistor R3 is also connected to one end of the first resistor R1. When the power-on signal Vout needs to be output, the input voltage Vin reaches one end of the fourth resistor R4 via the third resistor R3, and a stable differential voltage output is generated across the two ends of the fourth resistor R4 with the third terminal of the voltage regulator, so that the on-off of the isolation conduction unit can be controlled through this stable differential voltage output.

[0084] Optionally, the second diode D2 is used for grounding protection of the fourth resistor R4.

[0085] Figure 6 It is a schematic structural diagram of an isolation conduction unit in the power-on circuit provided by an embodiment of the present invention.

[0086] In a possible implementation manner, with reference to Figure 6 shown, on the basis of Figure 1 , the isolation conduction unit includes: an optoelectronic isolation switch.

[0087] The first input terminal of the optoelectronic isolation switch is connected to the output terminal of the activation unit, the second input terminal of the optoelectronic isolation switch is used to access the first auxiliary power supply P3V3, and the output terminal of the optoelectronic isolation switch is connected to the first input terminal of the latching unit.

[0088] Optionally, the optoelectronic isolation switch is used to turn on and off under the control of the activation unit, and when conducting, output the second latching control signal Input2 to the latching unit.

[0089] By using the optoelectronic isolation switch as the isolation conduction unit, the electrical isolation between the activation unit and the latching unit can be ensured, improving the safety and stability of the power-on circuit provided by the embodiment of the present invention. At the same time, it can also quickly and accurately measure the signal output by the output terminal of the activation unit and process it, thereby ensuring the precise control of the power-on circuit provided by the embodiment of the present invention.

[0090] Figure 7 It is a schematic structural diagram of a latching unit in the power-on circuit provided by an embodiment of the present invention.

[0091] In a possible implementation manner, with reference to Figure 7 shown, on the basis of Figure 1 , the latching unit includes: an oscillation module and a trigger module.

[0092] The first terminal of the oscillation module is connected to the output terminal of the isolation conduction unit. The second terminal of the oscillation module is connected to the first terminal of the trigger module. The third terminal of the oscillation module is connected to the second terminal of the trigger module. The third terminal of the trigger module is used to access the first latch control signal Input1, and the fourth terminal of the trigger module is used to output the power-on signal Vout.

[0093] Optionally, the oscillation module may include an oscillation circuit for generating a delayed high level under the action of the second latch control signal Input2. The trigger module is used to output the power-on signal Vout under the action of this high level and the first latch control signal Input1.

[0094] Figure 8 It is a schematic structural diagram of the oscillation module in the power-on circuit provided by the embodiment of the present invention.

[0095] [[ID=IO]]In a possible implementation manner, referring to Figure 8 as shown, on the basis of Figure 7 , the oscillation module includes a second capacitor C2 and a fifth resistor R5.

[0096] One end of the second capacitor C2 is connected to the output terminal of the isolation conduction unit, one end of the fifth resistor R5, the first terminal of the trigger module, and the second terminal of the trigger module. The other end of the second capacitor C2 is connected to the other end of the fifth resistor R5, and the other end of the second capacitor C2 is also grounded.

[0097] Optionally, the second capacitor C2 and the fifth resistor R5 are used to generate a delayed high level under the action of the second latch control signal Input2.

[0098] Figure 9 It is a schematic structural diagram of the trigger module in the power-on circuit provided by the embodiment of the present invention.

[0099] In a possible implementation manner, referring to Figure 9 as shown, on the basis of Figure 8 , the trigger module includes a trigger.

[0100] The first terminal of the trigger is connected to one end of the second capacitor C2, the output terminal of the isolation conduction unit, one end of the fifth resistor R5, and the second terminal of the trigger. The third terminal of the trigger is used to access the first latch control signal Input1, and the fourth terminal of the trigger is used to output the power-on signal Vout.

[0101] Optionally, the trigger module further includes a sixth resistor R6, a seventh resistor R7, and a third capacitor C3.

[0102] Optionally, the fifth terminal of the trigger is used to connect to one end of the third capacitor C3, the sixth terminal of the trigger is used to connect to the other end of the third capacitor C3, and the other end of the third capacitor C3 is also used to connect to the first auxiliary power supply P3V3.

[0103] Optionally, the third terminal of the trigger is also connected to one end of the sixth resistor R6, and the fourth terminal of the trigger is also connected to one end of the seventh resistor R7.

[0104] Optionally, one end of the third capacitor C3, the other end of the sixth resistor R6, and the other end of the seventh resistor R7 are also grounded.

[0105] Optionally, the third capacitor C3 is a filter capacitor for filtering the first auxiliary power supply P3V3.

[0106] Optionally, the following table is the logic level trigger table of the trigger. When the trigger outputs a power-on signal, it can be carried out according to the following rules, specifically referring to the following table:

[0107] Logic Level Trigger Table of the Trigger

[0108]

[0109]

[0110] Figure 10 This is another structural schematic diagram of the power-on circuit provided by the embodiment of the present invention. Refer to Figure 10 as shown, the working principle of the power-on circuit provided by the embodiment of the present invention will be described.

[0111] Exemplarily, refer to Figure 10 as shown. When the input voltage Vin < 45V, the voltage obtained by dividing the voltage between the first terminal and the second terminal of the voltage regulator through the first resistor R1 and the second resistor R2 is less than the reference voltage of 2.5V. There is no voltage output at the third terminal of the voltage regulator, and there is no voltage difference output across the fourth resistor R4.

[0112] Exemplarily, when the input voltage Vin > 45V, the voltage obtained by dividing the voltage between the first terminal and the second terminal of the voltage regulator through the first resistor R1 and the second resistor R2 is greater than the reference voltage of 2.5V. The voltage at the third terminal of the voltage regulator is 2.5V * (1 + R1 / R2) + Iref * R1, and a voltage difference is generated across the fourth resistor R4. Here, Iref is the current of the first resistor R1.

[0113] Exemplarily, the voltage difference generated across the fourth resistor R4 causes the opto-isolator switch to conduct, generating a second latch control signal Input2, i.e., a high level of 3.3V, which is output to the first terminal of the flip-flop. A rising edge is generated at the first terminal of the flip-flop. After passing through the second capacitor C2 and the fifth resistor R5, a delayed high level is generated, and a high level is generated at the fourth terminal of the flip-flop, outputting a power-on signal Vout until the first latch control signal Input1 connected to the third terminal of the flip-flop is at a high level.

[0114] Based on the same inventive concept, an embodiment of the present application further provides a backup battery. Figure 11 FIG. [FIGURE NUMBER] is a schematic structural diagram of the backup battery provided by the embodiment of the present utility model. Refer to Figure 11 As shown, the backup battery includes the above-mentioned power-on circuit and a power supply.

[0115] Optionally, the input terminal of the backup battery is connected to the power supply, and the output terminal is connected to the load.

[0116] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model. Please note that in the translation of , the specific figure number should be filled in according to the actual figure number in the original text. Here it is replaced with [FIGURE NUMBER] for generality.

Claims

1. A power-on circuit, characterized in that, Comprising: An activation unit, an isolation conduction unit, and a latching unit; The input end of the activation unit is used to access the input voltage of the power supply. The output end of the activation unit is connected to the input end of the isolation conduction unit. The output end of the isolation conduction unit is connected to the first input end of the latching unit. The second input end of the latching unit is used to access the first latching control signal. The output end of the latching unit is used to output a power-on signal; The activation unit is used to control the on / off of the isolation conduction unit under the action of the input voltage. The isolation conduction unit is used to output a second latching control signal to the latching unit when it is conducting. The latching unit is used to output a power-on signal under the action of the first latching control signal and the second latching control signal.

2. The power-on circuit according to claim 1, wherein The power-on circuit further comprises: a protection unit; The input end of the protection unit is used to access the input voltage. The output end of the protection unit is connected to the input end of the activation unit.

3. The power-on circuit according to claim 1, characterized in that, The activation unit comprises a first voltage dividing module, a second voltage dividing module, and a voltage regulator; The first end of the first voltage dividing module is used to access the input voltage. The second end of the first voltage dividing module is connected to the first end of the voltage regulator. The third end of the first voltage dividing module is connected to the second end of the voltage regulator; The first end of the second voltage dividing module is used to access the input voltage. The second end of the second voltage dividing module is connected to the third end of the voltage regulator. The third end of the second voltage dividing module is connected to the first input end of the isolation conduction unit. The fourth end of the second voltage dividing module is connected to the second input end of the isolation conduction unit.

4. The power-on circuit according to claim 3, wherein The first voltage dividing module comprises: a first resistor, a second resistor, and a first capacitor; One end of the first resistor is used to access the input voltage. The other end of the first resistor is connected to one end of the second resistor, one end of the first capacitor, and the first end of the voltage regulator. The other end of the second resistor is connected to the other end of the first capacitor and the second end of the voltage regulator. The other end of the second resistor is also grounded.

5. The power-on circuit according to claim 3, wherein The second voltage dividing module comprises: a third resistor, a fourth resistor, and a second diode; One end of the third resistor is used to access the input voltage. The other end of the third resistor is connected to one end of the fourth resistor, the negative electrode of the second diode, and the first input end of the isolation conduction unit. The positive electrode of the second diode is grounded; The other end of the fourth resistor is connected to the third end of the voltage regulator and the second input end of the isolation conduction unit.

6. The power-on circuit according to claim 1, wherein The isolation conduction unit comprises: an optoelectronic isolator switch; The first input end of the optoelectronic isolator switch is connected to the output end of the activation unit. The second input end of the optoelectronic isolator switch is used to access a first auxiliary power supply. The output end of the optoelectronic isolator switch is connected to the first input end of the latching unit.

7. The power-on circuit according to claim 1, wherein The latching unit comprises: an oscillation module and a trigger module; The first end of the oscillation module is connected to the output end of the isolation conduction unit. The second end of the oscillation module is connected to the first end of the trigger module. The third end of the oscillation module is connected to the second end of the trigger module; The third terminal of the trigger module is used to access the first latch control signal, and the fourth terminal of the trigger module is used to output a power-on signal.

8. The power-on circuit according to claim 7, wherein The oscillation module includes a second capacitor and a fifth resistor; One end of the second capacitor is connected to the output terminal of the isolation conduction unit, one end of the fifth resistor, the first terminal of the trigger module, and the second terminal of the trigger module; The other end of the second capacitor is connected to the other end of the fifth resistor, and the other end of the second capacitor is also grounded.

9. The boot-up circuit according to claim 8, characterized in that, The trigger module includes a trigger; The first terminal of the trigger is connected to one end of the second capacitor, the output terminal of the isolation conduction unit, one end of the fifth resistor, and the second terminal of the trigger; The third terminal of the trigger is used to access the first latch control signal, and the fourth terminal of the trigger is used to output a power-on signal.

10. A backup battery, characterized in that, It includes the power-on circuit according to any one of claims 1-9 and a power supply.

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