System automatic activation circuit

Abstract

The utility model relates to a system automatic activation circuit, each circuit is in an off state and almost has no leakage current before a load is connected, so that the standby time is greatly prolonged, the energy efficiency of a battery pack is improved, and when the load or a charging power supply is connected, the system automatic activation circuit can automatically activate a control chip, so that the system automatic activation is realized. The charging and discharging process of the whole circuit is controlled, and the safety of charging and discharging is ensured. The whole system automatic activation circuit is simple in structure and convenient to operate, the circuit production cost can be reduced, the circuit activation operation steps can be simplified, and the system dormancy leakage current is extremely low.

Description

Technical Field

[0001] The utility model belongs to a circuit system for power supply or power distribution, and in particular relates to a system automatic activation circuit. Background Art

[0002] The static leakage current of the battery pack is generally required to be as low as possible. In order to achieve this requirement, the control chip MCU will work in sleep mode when the battery pack is static, and all control circuits will be turned off. When the system needs to work, there will be a button or switch to activate the system.

[0003] There are many application environments, especially some automated applications, where using this button or switch as a condition for activating the control chip MCU increases the process flow, and a special automation program needs to be designed. Therefore, it is necessary to develop a button-free control chip MCU automatic activation circuit to solve the current technical problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a system automatic activation circuit to solve the technical problem that the MCU activation circuit of the traditional control system needs to be activated by a key, resulting in inconvenient operation.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a system automatic activation circuit, including a battery pack, a control chip and a load access wake-up module, the battery pack supplies power to the control chip, the load access wake-up module includes a switch tube Q3 connected to the negative electrode of the battery pack, and a switch tube Q1 connected to the positive electrode of the battery pack, the G pole of the switch tube Q3 is used to connect the negative electrode of the load, the S pole of the switch tube Q3 is connected to the negative electrode of the battery pack, the D pole of the switch tube Q3 is connected to the G pole of the switch tube Q1, the S pole of the switch tube Q1 is connected to the positive electrode of the battery pack, and the D pole is connected to the power management module U1, the power management module U The output terminal of 1 is connected to the control chip to supply power to the control chip. The S pole of the switch tube Q1 is also used to connect the positive pole of the load. The G pole of the switch tube Q3 is connected to the negative pole of the load through a resistor R9, a diode D3 and a voltage-stabilizing diode ZD5 connected in series. The negative pole of the diode D3 is connected to the G pole of the switch tube Q3 through the resistor R9. The resistor R9 is connected to the negative pole of the battery pack through the resistor R10. One end of the resistor R10 is connected between the resistor R9 and the G pole of the switch tube Q3. The positive pole of the voltage-stabilizing diode ZD5 is connected to the positive pole of the diode D3. The negative pole of the voltage-stabilizing diode ZD5 is used to connect the negative pole of the load.

[0006] As a preferred solution, the positive electrode of the battery pack is also connected to a switch tube Q2, and the G pole of the switch tube Q2 is connected to the positive electrode of the battery pack through a resistor R6 and a voltage regulator diode ZD2, the resistor R6 is connected in series between the voltage regulator diode ZD2 and the second switch tube Q2, the G pole of the switch tube Q2 is also connected to the S pole of the switch tube Q2 through a resistor R11, the S pole of the switch tube Q2 and the resistor R11 are connected in parallel to the positive end of the diode D4, the negative end of the diode D4 is used to connect to the negative pole of the charging power supply, the negative pole of the voltage regulator diode ZD2 is used to connect to the positive pole of the charging power supply, and the D pole of the switch tube Q2 is connected to the G pole of the switch tube Q1.

[0007] As a preferred solution, the positive terminal of the diode D4 is connected to the positive terminal of the voltage stabilizing diode ZD5.

[0008] As a preferred solution, the negative electrode of the battery pack is connected to a switch tube Q7 and a switch tube Q8 which are connected in series, wherein the S pole of the switch tube Q8 is connected to the negative electrode of the battery pack, the D pole of the switch tube Q8 is connected to the D pole of the switch tube Q7, the S pole of the switch tube Q7 is used to connect to the negative electrode of the load or the negative electrode of the charging power supply, and the G poles of the switch tubes Q7 and Q8 are respectively connected to and controlled by the control chip.

[0009] As a preferred solution, the system automatic activation circuit also includes a detection chip, which is connected to the positive pole of each battery in the battery pack to detect the voltage of each battery. The detection chip also detects the current at the negative end of the battery pack charging and discharging circuit through a sampling resistor. The detection chip is electrically connected to the control chip and sends the detection results to the control chip.

[0010] The beneficial effects of the utility model are as follows: before the system automatic activation circuit of the utility model is connected to the load, all circuits are in a disconnected state, with almost no leakage current, thereby greatly improving the standby time and the energy efficiency of the battery pack; when the load or charging power supply is connected, the system automatic activation circuit can automatically activate the control chip to control the charging and discharging process of the entire circuit to ensure the safety of charging and discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0012] Figure 1 It is a circuit diagram of the automatic activation circuit of the system described in the utility model;

[0013] Figure 1 Among them, 1. battery pack, 2. control chip, 3. detection chip. DETAILED DESCRIPTION

[0014] The specific implementation scheme of the utility model is described in detail below in conjunction with the accompanying drawings.

[0015] like Figure 1 As shown, the system automatic activation circuit described in the utility model includes a battery pack 1, a control chip and a load access wake-up module, the battery pack supplies power to the control chip, the load access wake-up module includes a switch tube Q3 connected to the negative electrode of the battery pack, and a switch tube Q1 connected to the positive electrode of the battery pack, the G pole of the switch tube Q3 is used to connect the negative electrode of the load, the S pole of the switch tube Q3 is connected to the negative electrode of the battery pack, the D pole of the switch tube Q3 is connected to the G pole of the switch tube Q1, the S pole of the switch tube Q1 is connected to the positive electrode of the battery pack, and the D pole is connected to the power management module, the output terminal of the power management module is connected to the control chip 2, and the control chip 2 is powered, and the S pole of the switch tube Q1 is also used to connect the positive electrode of the load. The switch tube Q3 is an N-type MOS tube, and the switch tube Q1 is a P-type MOS tube.

[0016] The G pole of the switch tube Q3 is connected to the negative pole of the load through a resistor R9, a diode D3 and a zener diode ZD5 connected in series, the negative pole of the diode D3 is connected to the G pole of the switch tube Q3 through the resistor R9, the resistor R9 is connected to the negative pole of the battery pack through the resistor R10, one end of the resistor R10 is connected between the resistor R9 and the G pole of the switch tube Q3, the positive pole of the zener diode ZD5 is connected to the positive pole of the diode D3, and the negative pole of the zener diode ZD5 is used to connect the negative pole of the load.

[0017] like Figure 1 As shown, when static, the system is in sleep mode, the switch tube Q1 is turned off, the system is powered off, the switch tubes Q7 and Q8 are disconnected, and the two grounds "SGND" and "GND" in the line are disconnected. When the load is connected, it is connected at the P+ and P- terminals. The voltage of the battery pack 1 passes through P+, load, P-, SGND, Zener diode ZD5, diode D3, resistor R9, resistor R10, GND, and then to the negative terminal of the battery pack to form a loop. The switch tube Q3 is turned on, which makes the switch tube Q1 turned on. The power management module U1 is powered and outputs a 3.3V voltage to the control chip 2. The control chip 2 is activated and the system is powered on.

[0018] It can be seen that before the load is connected, the entire system of this embodiment is in a power-off state, and the leakage current is extremely low, which greatly extends the battery life of the battery pack. After the load is connected, the system is automatically activated without the need to set a button, which simplifies the activation circuit and the activation operation.

[0019] In this embodiment, preferably, a switch tube Q2 is further connected to the positive electrode of the battery pack 1, and the G electrode of the switch tube Q2 is connected to the positive electrode of the battery pack 1 through a resistor R6 and a voltage regulator diode ZD2, the resistor R6 is connected in series between the voltage regulator diode ZD2 and the second switch tube Q2, the G electrode of the switch tube Q2 is also connected to the S electrode of the switch tube Q2 through a resistor R11, the S electrode of the switch tube Q2 and the resistor R11 are connected in parallel to the positive terminal of the diode D4, the negative terminal of the diode D4 is used to connect to the negative electrode of the charging power supply, the negative electrode of the voltage regulator diode ZD2 is used to connect to the positive electrode of the charging power supply, and the D electrode of the switch tube Q2 is connected to the G electrode of the switch tube Q1. The switch tube Q2 is an N-type MOS tube.

[0020] After setting the switch tube Q2, when the charging power supply is connected to the C+ and C- ends of the circuit, the system can also be automatically activated, thereby realizing the automatic charging activation function.

[0021] When the system is in a dormant state, the switch tube Q1 is turned off, the system is powered off, the switch tubes Q7 and Q8 are disconnected, and the two grounds "SGND" and "GND" in the line are disconnected. When the charging power supply is connected, it is connected at the C+ and C- terminals. The output voltage of the charging power supply comes out from the C+ terminal, passes through the voltage regulator diode ZD2, the resistor R6, the resistor R11, the diode D4, SGND, and reaches the C- terminal. The switch tube Q2 is turned on, which makes the switch tube Q1 turned on, the system is powered on, the control chip 2 is powered on, and various charging controls are performed according to the status of the battery pack 1.

[0022] In this embodiment, the positive terminal of the diode D4 is connected to the positive terminal of the voltage stabilizing diode ZD5 to simplify the circuit.

[0023] In this embodiment, the negative electrode of the battery pack is also connected to a switch tube Q7 and a switch tube Q8 connected in series, wherein the S pole of the switch tube Q8 is connected to the negative electrode of the battery pack, the D pole of the switch tube Q8 is connected to the D pole of the switch tube Q7, the S pole of the switch tube Q7 is used to connect to the negative electrode of the load or the negative electrode of the charging power supply, and the G poles of the switch tube Q7 and the switch tube Q8 are respectively connected to the control chip 2 and controlled by the control chip 2. The switch tube Q7 and the switch tube Q8 are both P-type MOS tubes. The switch tube Q7 is a charging control tube, and the switch tube Q8 is a discharging control tube.

[0024] This embodiment further includes a detection chip 3, which is connected to the positive electrode of each battery of the battery pack 1 to detect the voltage of each battery, and the detection chip also detects the current at the negative end of the battery pack charging and discharging circuit through a sampling resistor, and the detection chip is electrically connected to the control chip 2 to send the detection result to the control chip 2. The control chip 2 controls the charging and discharging process according to the detection result.

[0025] The system automatic activation circuit described in the utility model is in a disconnected state before being connected to a load, with almost no leakage current, thereby greatly improving the standby time and the energy efficiency of the battery pack. When connected to a load or a charging power source, the system automatic activation circuit can automatically activate the control chip 2 to control the charging and discharging process of the entire circuit to ensure the safety of charging and discharging. The system automatic activation circuit described in the utility model has a simple activation method and a concise activation circuit, which reduces production costs while improving operational convenience.

[0026] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A system automatic activation circuit, characterized in that: It includes a battery pack, a control chip and a load access wake-up module. The battery pack supplies power to the control chip. The load access wake-up module includes a switch tube Q3 connected to the negative electrode of the battery pack and a switch tube Q1 connected to the positive electrode of the battery pack. The G pole of the switch tube Q3 is used to connect to the negative electrode of the load, the S pole of the switch tube Q3 is connected to the negative electrode of the battery pack, the D pole of the switch tube Q3 is connected to the G pole of the switch tube Q1, the S pole of the switch tube Q1 is connected to the positive electrode of the battery pack, and the D pole is connected to the power management module. The output end of the power management module is connected to the control chip to supply power to the control chip. The S pole of the switch tube Q1 is also used to connect the positive pole of the load, the G pole of the switch tube Q3 is connected to the negative pole of the load through a resistor R9, a diode D3 and a zener diode ZD5 connected in series, the negative pole of the diode D3 is connected to the G pole of the switch tube Q3 through the resistor R9, the resistor R9 is connected to the negative pole of the battery pack through the resistor R10, one end of the resistor R10 is connected between the resistor R9 and the G pole of the switch tube Q3, the positive pole of the zener diode ZD5 is connected to the positive pole of the diode D3, and the negative pole of the zener diode ZD5 is used to connect the negative pole of the load.

2. The system automatic activation circuit according to claim 1, characterized in that: The positive electrode of the battery pack is also connected to a switch tube Q2, and the G pole of the switch tube Q2 is connected to the positive electrode of the battery pack through a resistor R6 and a voltage regulator diode ZD2. The resistor R6 is connected in series between the voltage regulator diode ZD2 and the second switch tube Q2. The G pole of the switch tube Q2 is also connected to the S pole of the switch tube Q2 through a resistor R11. The S pole of the switch tube Q2 and the resistor R11 are connected in parallel to the positive end of the diode D4. The negative end of the diode D4 is used to connect to the negative pole of the charging power supply. The negative pole of the voltage regulator diode ZD2 is used to connect to the positive pole of the charging power supply. The D pole of the switch tube Q2 is connected to the G pole of the switch tube Q1.

3. The system automatic activation circuit according to claim 2, characterized in that: The positive terminal of the diode D4 is connected to the positive terminal of the voltage stabilizing diode ZD5.

4. The system automatic activation circuit according to any one of claims 1 to 3, characterized in that: The negative electrode of the battery pack is connected to a switch tube Q7 and a switch tube Q8 which are connected in series, wherein the S pole of the switch tube Q8 is connected to the negative electrode of the battery pack, the D pole of the switch tube Q8 is connected to the D pole of the switch tube Q7, the S pole of the switch tube Q7 is used to connect to the negative electrode of the load or the negative electrode of the charging power supply, and the G poles of the switch tubes Q7 and Q8 are respectively connected to and controlled by the control chip.

5. The system automatic activation circuit according to claim 4, characterized in that: It also includes a detection chip, which is connected to the positive electrode of each battery in the battery pack to detect the voltage of each battery. The detection chip also detects the current at the negative end of the battery pack charging and discharging circuit through a sampling resistor. The detection chip is electrically connected to the control chip and sends the detection results to the control chip.

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