CN204243882U - A power management device for a massager - Google Patents

Abstract

The utility model provides a kind of electric power controller of massager, comprise external power supply, stand-by power supply and load control unit, external power supply and stand-by power supply are electrically connected on load control unit respectively, described stand-by power supply comprises storage battery and battery control unit, it is characterized in that, described battery control unit comprises relay and transistor switching circuit, relay comprises relay switch and relay coil, storage battery connects load control unit by relay switch, one end of relay coil connects the reference voltage end of load control unit, other end connecting triode switching circuit.The electric power controller of a kind of massager that the utility model provides, can when external Power supply generation open circuit, controls stand-by power supply circuit and disconnects, thus avoids stand-by power supply and be in loss state for a long time.

Description

A power management device for a massager

technical field

The utility model provides a power management device of a massager.

Background technique

At present, the power supply household products with a backup power supply on the market generally use the backup power supply directly integrated into the external power supply for power supply. Since the voltage of the external power supply is higher than that of the backup power supply, the backup power supply does not work when the external power supply is in normal power supply. However, when the external power supply fails, such as a power outage, the backup power supply will continue to work, resulting in fearless power consumption. When users need to use the backup power to reset the product, they often find that the power of the backup power has been exhausted and the reset operation cannot be performed.

Utility model content

The main technical problem to be solved by the utility model is to provide a power management device for a massager, which cuts off the power supply of the backup power supply when there is no external power supply, so that the backup power supply will not be in the power supply state for a long time, avoiding the need for backup power supply deadweight loss.

In order to solve the above-mentioned technical problems, the utility model provides a power management device for a massager, including an external power supply, a backup power supply and a load control unit, the external power supply and the backup power supply are respectively electrically connected to the load control unit, and the backup power supply includes Battery and battery control unit; the battery control unit includes a relay and a triode switch circuit, the relay includes a relay switch and a relay coil, the battery is connected to the load control unit through the relay switch, one end of the relay coil is connected to the reference voltage end of the load control unit, and the other end Connect the triode switch circuit.

In a preferred embodiment: the control electrode of the triode switch circuit is connected to the processor MCU of the load control unit.

In a preferred embodiment: the battery control unit further includes a freewheeling diode connected in parallel with the relay coil.

In a preferred embodiment: the load control unit includes a DC-DC module, and the input end of the DC-DC module is electrically connected to an external power supply and a backup power supply.

In a preferred embodiment: the input end of the DC-DC module is provided with a polar capacitor and a non-polar capacitor for voltage stabilization, and the polar capacitor and the non-polar capacitor are connected in parallel.

In a preferred embodiment: the voltage values provided by the external power supply and the standby power supply are different.

In a preferred embodiment: the power management device of the massager further includes a USB charging terminal, and the USB charging terminal is electrically connected to an external power supply.

Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

1. The utility model provides a power management device for a massager, which can control the disconnection of the backup power circuit when the external power supply is disconnected, thereby avoiding the backup power supply being in a state of loss for a long time.

2. The power management device of a massager provided by the utility model has a simple structure, can be widely used in various massagers, and has a good popularization effect.

Description of drawings

Fig. 1 is the circuit diagram of preferred embodiment 1 of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Example 1

Referring to FIG. 1 , a massager power management device includes a load control unit, an external power supply DC-input and a backup power supply. The backup power supply includes a battery Battery and a battery control unit; the battery control unit includes a relay K1 and a triode switch circuit, the relay K1 includes a relay switch and a relay coil, the battery Battery is connected to the load control unit through the relay switch, and one end of the relay coil is connected to the load The reference voltage end of the control unit, and the other end is connected to the triode switch circuit.

The base of the transistor Q1 in the transistor switch circuit is connected to the control chip MCU, the emitter is grounded, and the collector is connected to one end of the relay coil; the other end of the relay coil is connected to the power supply module. The power supply module includes a polar capacitor C4 connected in parallel to the external power supply terminal. The drop-down resistor R7 is connected in series between the base of the triode Q1 and the control chip MCU, and is used for stepping down the control signal sent by the control chip MCU to a voltage suitable for the triode Q1; Resistor R8 is set to provide bias voltage for the base. The relay coil is connected in antiparallel with the one-way diode D4 to form a freewheeling circuit. When the current in the relay coil changes rapidly, the one-way diode D4 generates a reverse electromotive force to prevent the induced electromotive force in the relay coil from breaking down the transistor Q1.

The working process of the power management device circuit of the above-mentioned massager is:

When the external power supply works normally, the control chip MCU sends a high-level control signal, the transistor Q1 is turned on, the relay K1 has current flowing, the normally open contact is closed, and the backup power circuit is closed. But because the voltage of the backup power is lower than the voltage of the external power supply, the backup power does not work. When the external power supply is cut off, the system switches to the backup power supply, at this time the product can only be reset, and other functions are turned off. At the same time, the control chip MCU starts timing. If the user performs a reset operation within the timing time, the control chip MCU outputs a low-level control signal, the transistor Q1 is cut off, the normally open contact of the relay K1 is opened, and the backup power circuit is disconnected; During the timing time, if the user does not perform a reset operation, the control chip MCU outputs a low-level control signal after the timing ends, the transistor Q1 is turned off, the normally open contact of the relay K1 is opened, and the backup power circuit is disconnected. In this way, after the reset operation is completed, the whole system has no power supply, thereby avoiding the fearless loss of the backup power supply.

Through the above control method, the utility model provides a massager power management device, which can control the disconnection of the backup power circuit when the external power supply is disconnected, thereby avoiding the backup power supply being in a state of loss for a long time. And the structure is simple, can be widely used in various massagers, and has a good promotion effect.

Present embodiment also includes following preferred design:

The load control unit includes a DC-DC power supply module U1, the input end of the DC-DC power supply module U1 is electrically connected to the external power supply and the backup power supply, and the output end of the DC-DC power supply module U1 is connected to the input end of the load module. The input end of the DC-DC power supply module is provided with a voltage stabilizing module, and the voltage stabilizing module includes a polarized capacitor C2 and a nonpolar capacitor C3 connected in parallel. The power management device of a massager includes a USB charging terminal J6, and the USB charging terminal J6 is connected to an external power supply.

The voltages of the external power supply and the backup power supply are not the same, or they can be the same. In the utility model, it is preferred to be different, and the voltage of the external power supply is greater than the voltage of the standby power supply. The output end of the DC-DC power module U1 is provided with a suppression module to stabilize the output voltage of the DC-DC power module U1 to 5V. In this embodiment, the output end of the DC-DC power module U1 is the load control unit The reference voltage end of the relay is connected to the coil of the relay so as to supply power to the relay K1.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (7)

1. the electric power controller of a massager, comprise external power supply, stand-by power supply and load control unit, external power supply and stand-by power supply are electrically connected on load control unit respectively, described stand-by power supply comprises storage battery and battery control unit, it is characterized in that, described battery control unit comprises relay and transistor switching circuit, relay comprises relay switch and relay coil, storage battery connects load control unit by relay switch, one end of relay coil connects the reference voltage end of load control unit, other end connecting triode switching circuit.

2. the electric power controller of massager according to claim 1, is characterized in that, the control pole of described transistor switching circuit is connected to the processor MCU of load control unit.

3. the electric power controller of massager according to claim 1, is characterized in that, described battery control unit also comprises a fly-wheel diode in parallel with relay coil.

4. the electric power controller of massager according to claim 1, is characterized in that, described load control unit comprises DC-DC module, and the input of DC-DC module is electrically connected with external power supply and stand-by power supply.

5. the electric power controller of massager according to claim 4, is characterized in that, the input of DC-DC module has been provided with dc capacitor and the non-polar condenser of pressure stabilization function, and described dc capacitor is in parallel with non-polar condenser.

6. the electric power controller of massager according to claim 1, is characterized in that, the magnitude of voltage that described external power supply and stand-by power supply provide is not identical.

7. the electric power controller of massager according to claim 1, is characterized in that, the electric power controller of described massager also comprises USB charging end, and USB charging end is electrically connected with external power supply.