CN220382940U - Starting-up impact current buffer circuit, battery power supply circuit and electric equipment - Google Patents
Starting-up impact current buffer circuit, battery power supply circuit and electric equipment Download PDFInfo
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- CN220382940U CN220382940U CN202321833566.3U CN202321833566U CN220382940U CN 220382940 U CN220382940 U CN 220382940U CN 202321833566 U CN202321833566 U CN 202321833566U CN 220382940 U CN220382940 U CN 220382940U
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of a starting circuit powered by a battery, and particularly relates to a starting impact current buffer circuit, a battery power supply circuit and electric equipment, wherein the starting impact current buffer circuit comprises a switch circuit module, a buffer circuit module, a delay circuit module and a conducting circuit module; one end of the switch circuit module is connected with the input end of the battery, and the other end of the switch circuit module is connected with the buffer circuit module; the other end of the buffer circuit module is communicated with the delay circuit module to provide buffer electric energy for instant output energy of the battery; the other end of the delay circuit module is communicated with the conduction circuit module and is used for controlling the conduction of the conduction circuit module and the charging time of the buffer circuit module; and the other end of the conduction circuit module is connected with the input of the system and used for controlling the operation of the system. The buffer capacitor module and the delay circuit module are arranged to provide buffer electric energy for the instantaneous energy output by the battery, so that the situation that the system cannot be started or the system is restarted repeatedly at the moment of starting is avoided, and the stable operation of the system at the moment of starting is ensured.
Description
Technical Field
The utility model belongs to the technical field of a starting circuit powered by a battery, and particularly relates to a starting impact current buffer circuit, a battery power supply circuit and electric equipment.
Background
At present, for most battery starting circuits, at the moment of starting, the battery charges a capacitor in the circuit, all chips are working, and some motors are working, so that the current consumption is too high at the moment of starting. For some batteries with insufficient output capacity or excessively high internal resistance, under the condition of excessively high instantaneous current, the batteries cannot output or the battery voltage drops excessively, so that the system cannot be started or the system is restarted repeatedly.
Chinese patent CN 213879276U discloses a startup surge current suppression circuit, a battery power supply circuit and electric equipment, comprising: the switching circuit module, the control circuit module and the conduction circuit module. The grid voltage of the MOS transistor Q3 is slowly increased through the resistor R98 and the capacitor C88, so that the time from the closed state to the full conduction of the MOS transistor Q3 is increased, the time from the closed state to the full conduction state of the MOS transistor Q2 is increased, and the instant current during starting is limited. However, the circuit has only one battery, and the battery output is insufficient, so that the phenomenon that the system cannot be started or the system is restarted repeatedly still exists at the moment of starting.
Disclosure of Invention
In order to solve the problems that the partial battery in the prior art is low in output current, large in internal resistance of the battery and large in starting instant current, and a system cannot be started or the system is restarted repeatedly, the utility model provides a starting impact current buffer circuit, a battery power supply circuit and electric equipment, and the specific technical scheme is as follows:
a startup surge current buffer circuit comprises a switch circuit module, a buffer circuit module, a delay circuit module and a conducting circuit module;
one end of the switch circuit module is connected with the input end of the battery, and the other end of the switch circuit module is connected with the buffer circuit module and used for controlling the starting of the system;
the other end of the buffer circuit module is communicated with the delay circuit module, after the switch circuit module is closed, the battery can charge the buffer circuit module, and the buffer circuit module provides buffer electric energy for instantaneous energy output of the battery;
the other end of the delay circuit module is communicated with the conduction circuit module and is used for controlling conduction of the conduction circuit module and controlling charging time of the buffer circuit module;
and the other end of the conduction circuit module is connected with the system and used for controlling the operation of the system.
Further, the switch circuit module comprises a switch, a first MOS tube, a second MOS tube, a first resistor, a second resistor, a first capacitor and a second capacitor; one end of the switch is connected with the input end of the battery, and the other end of the switch is connected with the buffer circuit module; the source electrode of the first MOS tube is connected with one end of the switch connected with the input end of the battery, and the drain electrode of the first MOS tube is connected with the other end of the switch connected buffer circuit module; one end of the first resistor connected in parallel with the first capacitor is connected with the source electrode of the first MOS tube, and the other end of the first resistor is connected with the grid electrode of the first MOS tube;
the grid electrode of the first MOS tube is connected with the drain electrode of the second MOS tube, the source electrode of the second MOS tube is grounded, one end of the second capacitor connected with the second resistor in parallel is connected with the grid electrode of the second MOS tube, the end of the second capacitor is connected with the signal output end of the controller, and the other end of the second capacitor connected with the second resistor in parallel is grounded.
Further, the buffer circuit module comprises a third capacitor, the positive electrode of the third capacitor is connected with one end of the switch, and the negative electrode of the third capacitor is grounded.
Further, the delay circuit module comprises a fourth capacitor and a third resistor, one end of the fourth capacitor is connected with the positive electrode of the third capacitor, the other end of the fourth capacitor is connected with one end of the third resistor, and the other end of the third resistor is grounded.
Further, the conducting circuit module is a third MOS tube, a source electrode of the third MOS tube is connected with one end of the fourth capacitor, a grid electrode of the third MOS tube is connected with one end of the third resistor, and a drain electrode of the third MOS tube is connected with the system.
Further, the delay time of the conducting circuit module is the product of the capacitance value of the fourth capacitor and the resistance value of the third resistor, after the switch is closed, the third MOS tube is conducted after the delay time, and the system is started.
Further, the first MOS tube is a PMOS tube, the second MOS tube is an NMOS tube, and the third MOS tube is a PMOS tube.
The utility model also provides a battery power supply circuit which comprises the startup impact current buffer circuit.
The utility model also provides electric equipment which comprises the startup impact current buffer circuit.
The utility model has the following beneficial effects:
the buffer circuit module and the delay circuit module, namely the third capacitor, the fourth capacitor and the third resistor, are arranged at the rear end of the switch circuit module. The switch circuit module is closed, the delay circuit module, namely the fourth capacitor and the third resistor, can generate automatic starting delay, the delay time is the product of the capacitance value of the fourth capacitor and the resistance value of the third resistor, in the delay time, the battery can fully charge the buffer circuit module, namely the third capacitor, the third capacitor provides buffer electric energy for instant output energy of the battery, so that the situations that partial internal resistance of the battery is large and the output current of the battery is low are met, the situations that a system cannot be started or the system is repeatedly restarted due to overlarge current in starting are avoided, and the stable operation of the system in starting moment is ensured.
Drawings
Fig. 1 is a circuit diagram of the present utility model.
Reference numerals:
SW 1-switch, Q4A-first MOS tube, R11-first resistor, C23-first capacitor, Q4B-second MOS tube, R12-second resistor, C33-second capacitor, C5-third capacitor, C8-fourth capacitor, R17-third resistor, Q6-third MOS tube, PWR-EN-signal output end of controller.
Detailed Description
The technical solutions of the present utility model will be clearly described below with reference to the accompanying drawings, and it is obvious that the described embodiments are not all embodiments of the present utility model, and all other embodiments obtained by a person skilled in the art without making any inventive effort are within the scope of protection of the present utility model.
It should be noted that, the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "horizontal", "left", "right", "front", "rear", "lateral", "longitudinal", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
As shown in fig. 1, the utility model provides a startup surge current buffer circuit, which comprises a switch circuit module, a buffer circuit module, a delay circuit module and a conducting circuit module.
One end of the switch circuit module is connected with the battery power supply voltage input end, the other end of the switch circuit module is connected with the buffer circuit module, the switch circuit module is used for controlling the starting of a system, and the system is a generic name of various electronic devices externally connected with the starting impact current buffer circuit, such as various chips, motors, capacitors and the like. Specifically, the switch circuit module includes a switch SW1, a first MOS transistor Q4A, a second MOS transistor Q4B, a first resistor R11, a first capacitor C23, a second resistor R12, and a second capacitor C33, where the first MOS transistor Q4A is a PMOS transistor, and the second MOS transistor Q4B is an NMOS transistor.
The switch circuit module is specifically connected with: one end of the switch SW1 is connected with the battery input end, and the other end of the switch SW1 is connected with the buffer circuit module; the source electrode of the first MOS tube Q4A is connected with one end of the switch SW1 connected with the input end of the battery, and the drain electrode of the first MOS tube Q4A is connected with one end of the switch SW1 connected with the buffer circuit module; one end of the first resistor R11 connected in parallel with the first capacitor C23 is connected with the source electrode of the first MOS tube Q4A, the other end of the first resistor R11 is connected with the grid electrode of the first MOS tube Q4A, the grid electrode of the first MOS tube Q4A is connected with the drain electrode of the second MOS tube Q4B, the source electrode of the second MOS tube Q4B is grounded, one end of the second capacitor C33 connected in parallel with the second resistor R12 is connected with the grid electrode of the second MOS tube Q4B, the end of the second capacitor C33 is connected with the signal output end PWR-EN of the controller, and the other end of the second capacitor C is grounded.
One end of the buffer circuit module is connected with the switch circuit module, and the other end of the buffer circuit module is connected with the delay circuit module and is used for storing electric energy and providing buffer electric energy for instant energy output of the battery. The buffer circuit module comprises a third capacitor C5. The third capacitor C5 is connected to one end of the switch SW1, and the negative electrode of the third capacitor C5 is grounded.
One end of the delay circuit module is connected with the buffer circuit module, the other end of the delay circuit module is connected with the conduction module, the delay circuit is used for obtaining a certain delay time for the conduction circuit module, the system starts to operate, and the buffer circuit module can obtain a sufficient charging time within the delay time. Specifically, the delay circuit module includes a fourth capacitor C8 and a third resistor R17, where one end of the fourth capacitor C8 is connected to the positive electrode of the third capacitor C5, the other end is connected to one end of the third resistor R17, and the other end of the third resistor R17 is grounded. The fourth capacitor C8 and the third resistor R17 form an automatic delay circuit, and the delay time of the delay circuit can be configured by the fourth capacitor C8 and the third resistor R17, where the specific delay time value is the product of the capacitance value of the fourth capacitor and the resistance value of the third resistor. In the time delay, the third capacitor C5 of the buffer circuit module obtains enough charging time, and the third capacitor C5 is fully charged and used as a standby battery to cope with large impact current during starting.
The on circuit module is used for controlling the operation of the system, one end of the on circuit module is connected with the delay circuit module, and the other end of the on circuit module is connected with the input end of the system. The specific on-circuit module is a third MOS tube Q6, the third MOS tube is a PMOS tube, the source electrode of the third MOS tube Q6 is connected with one end of a fourth capacitor C8, the grid electrode of the third MOS tube Q6 is connected with one end of a third resistor R17, the drain electrode of the third PMOS tube Q6 is connected with the system, and the drain electrode of the third PMOS tube Q6 is used as the output end of starting-up impact current.
When the battery is in an in-place state, after the switch SW1 is closed, the battery charges the third capacitor C5, meanwhile, due to the effect of the fourth capacitor C8 and the third resistor R17, the third MOS transistor Q6 is not immediately turned on, so that the battery has enough time to charge the third capacitor C5, after the delay time t=r17×c8 (where t is delay time, R17 is the resistance value of the third resistor, and C8 is the capacitance value of the fourth capacitor), the third MOS transistor Q6 is turned on, at this time, the system is started, high-power devices such as a chip begin to operate, and at this time, high energy is required instantaneously, and at this time, the third capacitor C5 outputs energy to the system, and provides buffer energy for instantaneous energy output of the battery. The buffer circuit module and the delay circuit module are used for realizing that the buffer circuit module is charged by the early-stage battery, and the later-stage buffer circuit module replaces the battery to provide a part of electric energy. The situation that the system cannot be started or the system is restarted repeatedly caused by overlarge current at the moment of starting is avoided, and the stable operation of the system at the moment of starting is ensured.
After the power-on is completed, the switch SW1 is turned off, the controller sends a pwr_en signal to output a high level to the second MOS transistor Q4B, and the second MOS transistor Q4B is turned on, so that the first MOS transistor Q4A is turned on, and the source S2 to the drain D2 of the first MOS transistor are turned on, so that the battery energy can reach the turn-on circuit module, i.e., the third MOS transistor Q6 through the second MOS transistor Q4A. I.e. the power-on is completed, the system can still keep the power-on state after the switch SW1 is turned off.
The utility model can be applied to electronic products such as battery power supply circuits, electric equipment and the like which need to control the starting instant current.
The technical characteristics form the optimal embodiment of the utility model, have stronger adaptability and optimal implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the needs of different situations.
Finally, it should be noted that the above description is only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model, and that the simple modification and equivalent substitution of the technical solution of the present utility model can be made by those skilled in the art without departing from the spirit and scope of the technical solution of the present utility model.
Claims (9)
1. The utility model provides a start-up impulse current buffer circuit which characterized in that: the circuit comprises a switch circuit module, a buffer circuit module, a delay circuit module and a conduction circuit module;
one end of the switch circuit module is connected with the input end of the battery, and the other end of the switch circuit module is connected with the buffer circuit module and used for controlling the starting of the system;
the other end of the buffer circuit module is communicated with the delay circuit module, after the switch circuit module is closed, the battery can charge the buffer circuit module, and the buffer circuit module provides buffer electric energy for instantaneous energy output of the battery;
the other end of the delay circuit module is communicated with the conduction circuit module and is used for controlling conduction of the conduction circuit module and controlling charging time of the buffer circuit module;
and the other end of the conduction circuit module is connected with the system and used for controlling the operation of the system.
2. The power on rush current buffer circuit of claim 1 wherein: the switch circuit module comprises a switch, a first MOS tube, a second MOS tube, a first resistor, a second resistor, a first capacitor and a second capacitor; one end of the switch is connected with the input end of the battery, and the other end of the switch is connected with the buffer circuit module; the source electrode of the first MOS tube is connected with one end of the switch connected with the input end of the battery, and the drain electrode of the first MOS tube is connected with the other end of the switch connected buffer circuit module; one end of the first resistor connected in parallel with the first capacitor is connected with the source electrode of the first MOS tube, and the other end of the first resistor is connected with the grid electrode of the first MOS tube;
the grid electrode of the first MOS tube is connected with the drain electrode of the second MOS tube, the source electrode of the second MOS tube is grounded, one end of the second capacitor connected with the second resistor in parallel is connected with the grid electrode of the second MOS tube, the end of the second capacitor is connected with the signal output end of the controller, and the other end of the second capacitor connected with the second resistor in parallel is grounded.
3. The power on rush current buffer circuit according to claim 2 wherein: the buffer circuit module comprises a third capacitor, wherein the positive electrode of the third capacitor is connected with one end of the switch, and the negative electrode of the third capacitor is grounded.
4. A power-on rush current buffer circuit according to claim 3 wherein: the delay circuit module comprises a fourth capacitor and a third resistor, one end of the fourth capacitor is connected with the positive electrode of the third capacitor, the other end of the fourth capacitor is connected with one end of the third resistor, and the other end of the third resistor is grounded.
5. The power on rush current buffer circuit of claim 4 wherein: the on circuit module is a third MOS tube, a source electrode of the third MOS tube is connected with one end of the fourth capacitor, a grid electrode of the third MOS tube is connected with one end of the third resistor, and a drain electrode of the third MOS tube is connected with the system.
6. The power on rush current buffer circuit of claim 5 wherein: the delay time of the conducting circuit module is the product of the capacitance value of the fourth capacitor and the resistance value of the third resistor, after the switch is closed, the third MOS tube is conducted after the delay time, and the system is started.
7. The power on rush current buffer circuit of claim 6 wherein: the first MOS tube is a PMOS tube, the second MOS tube is an NMOS tube, and the third MOS tube is a PMOS tube.
8. A battery powered circuit, characterized by: comprising a power-on rush current buffer circuit according to any one of claims 1 to 7.
9. An electrical consumer, characterized in that: comprising a power-on rush current buffer circuit according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321833566.3U CN220382940U (en) | 2023-07-13 | 2023-07-13 | Starting-up impact current buffer circuit, battery power supply circuit and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321833566.3U CN220382940U (en) | 2023-07-13 | 2023-07-13 | Starting-up impact current buffer circuit, battery power supply circuit and electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220382940U true CN220382940U (en) | 2024-01-23 |
Family
ID=89564305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321833566.3U Active CN220382940U (en) | 2023-07-13 | 2023-07-13 | Starting-up impact current buffer circuit, battery power supply circuit and electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220382940U (en) |
-
2023
- 2023-07-13 CN CN202321833566.3U patent/CN220382940U/en active Active
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