CN212543398U

CN212543398U - Lithium battery boost charging circuit of portable massager

Info

Publication number: CN212543398U
Application number: CN202021275380.7U
Authority: CN
Inventors: 叶小德; 黄晨晖
Original assignee: Xiamen Xin Yuan Electronic Technology Co ltd
Current assignee: Xiamen Xin Yuan Electronic Technology Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-02-12
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses a lithium cell boost charging circuit of portable massager, the utility model discloses a lithium cell, charge and charge indication module and charge and discharge protection module, be provided with on the lithium cell and charge indication module, charge and charge indication module and be connected with the feeder ear of lithium cell, charge and be provided with on the charge indication module charge and charge protection module, the utility model provides a when using the massager, lithium cell group can produce higher heat, reduces the finished product cost of enterprise, adopts special IC, and the reduction circuit generates heat in work to there is temperature detection and excess temperature protect function, guarantees that the user uses the security of this product.

Description

Lithium battery boost charging circuit of portable massager

Technical Field

The utility model belongs to the technical field of circuit control and specifically relates to a lithium cell boost charging circuit of portable massager is related to.

Background

The existing portable massager lithium battery power supply in the market at present adopts a special matching adapter, which brings inconvenience to the use of consumers; meanwhile, due to the inherent defects of the lithium battery pack circuit, when a user uses the massager, the lithium battery pack can generate high heat, so that potential safety hazards exist in the battery, personal injury can be brought to the user, and therefore the lithium battery boosting charging circuit of the portable massager is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lithium cell boost charging circuit of portable massager.

The utility model discloses a lithium cell, charge and charge indication module and charge-discharge protection module, be provided with on the lithium cell and charge indication module, charge and charge indication module and the power supply end of lithium cell is connected, charge and be provided with on the charge indication module charge and discharge protection module, charge and charge indication module includes seventh resistance R7 and charging IC U2, external power supply's the input that charges with seventh resistance R7's first end is connected, seventh resistance R7's second end with charging IC U2's sixth foot is connected and is charged, charging IC U2's the 5 th foot is connected with the base of opening switch IC Q2, opening switch IC Q2's projecting pole ground connection, opening switch IC Q2's collecting electrode with the negative pole of charging indication LED lamp is connected, charging IC 2 the 5 th foot is connected with the external power supply negative pole, the fourth foot of the charging IC U2 is connected with the fifth resistor R5 and then grounded, the third foot of the charging IC U2 is connected with the fourth resistor R4 and then grounded, the first foot of the charging IC U2 is connected with the fourth resistor C4 and the fifth capacitor respectively and then grounded, and the first foot of the charging IC U2 is connected with the charging and discharging protection module.

Furthermore, the charge and discharge protection module comprises a third protection IC U3, a thirty-third resistor R33, a temperature-sensitive resistor NTC1 and a high-level control switch tube M1-4, wherein the output voltage of the 8 th pin of the third protection IC U3 is transmitted to the negative electrode of a power supply through a resistor R33 and a temperature-sensitive resistor NTC1, the detection resistor R33 of the 9 th pin of the protection IC U3, and the 1 st pin and the 3 rd pin of the protection IC U3 output the high-level control switch tube M1-4 to be conducted.

Further, the 3 rd pin of the charging IC U2 is connected to a fourth resistor R4.

Further, the 5 th pin of the charging IC U2 is connected to a fifth resistor R5.

The beneficial effects of the utility model reside in that:

the utility model solves the problems that when the massager is used, the lithium battery pack can generate higher heat, and a user can use all 5V adapters matched with portable electronic products such as mobile phones or flat plates and the like to charge the product, thereby reducing the finished product cost of enterprises and improving the profit of the enterprises; the special IC is adopted to reduce the heating of the circuit in the work, and the temperature detection and over-temperature protection functions are provided, so that the safety of the product used by a user is ensured, and the product can be applied to occasions such as office buildings, hotels, villas, apartments, common homes and the like.

Drawings

FIG. 1 is a circuit diagram of the present invention;

wherein, the diagram A is a charging and charging indication module; and the figure B is a charge and discharge protection module.

Detailed Description

The present invention will be further described with reference to the following examples, which are not intended to limit the scope of the invention.

As shown in fig. 1, the present invention includes a lithium battery, a charging and charging indication module and a charging and discharging protection module, wherein the lithium battery is provided with the charging and charging indication module, the charging and charging indication module is connected to a power supply terminal of the lithium battery, the charging and charging indication module is provided with the charging and discharging protection module, the charging and charging indication module includes a seventh resistor R7 and a charging IC U2, a charging input terminal of an external power supply is connected to a first terminal of the seventh resistor R7, a second terminal of the seventh resistor R7 is connected to a sixth pin of the charging IC U2 for charging, a 5 th pin of the charging IC U2 is connected to a base of the open switch IC Q2, an emitter of the open switch IC Q2 is grounded, a collector of the open switch IC Q2 is connected to a negative terminal of the charging indication LED lamp, a 5 th pin of the charging IC 2 is connected to a negative terminal of the external power supply, the fourth foot of the charging IC U2 is connected with the fifth resistor R5 and then grounded, the third foot of the charging IC U2 is connected with the fourth resistor R4 and then grounded, the first foot of the charging IC U2 is connected with the fourth resistor C4 and the fifth capacitor respectively and then grounded, and the first foot of the charging IC U2 is connected with the charging and discharging protection module.

When a user charges the mobile product through a charging input end C +, C-connected DC 5V adapter of a graph A in the drawing, a 6 th pin of a charging IC U2 supplies power to a charging IC U2 through a resistor R7, the charging IC U2 starts to work, and if the input voltage is too low, the charging IC U4 enters a dormant state; at this time, the charging current passes through the power inductor L1, the 8 th pin of the charging IC U2 is output to the anode B + of the lithium battery from the 2 nd pin of the charging IC U2 to charge the lithium battery, and simultaneously, the charging IC U2 detects the input voltage and automatically adjusts the input current to adapt to the adapter load.

The 3 rd pin of the charging IC U2 is connected to the fourth resistor R4, and the constant voltage charging voltage can be adjusted by adjusting the resistance of R4.

The 4 th pin of the charging IC U2 is connected with the fifth resistor R5, and the NTC detection function is closed.

When the 5 th pin of the charging IC U2 is in a charging state, high level is output, the switch IC Q2 is turned on, at the moment, the input voltage passes through the resistor R8, the light emitting diode LED1 and the switch IC Q2 to the negative electrode of a power supply, and the charging indication LED is turned on in a red light; when the charging is finished, the 5 th pin of the charging IC U2 outputs low level when in a charging state, the switch IC Q2 is closed, the input voltage passes through the resistor R8, the light emitting diode LED1, the 5 th pin of the charging IC U2 to the cathode of the power supply, and the charging indication LED is turned on in a green light mode.

When charging is abnormal, the charging indicator light can realize alternate flashing of the traffic light to indicate that the charging circuit works abnormally.

The charge and discharge protection module:

in the attached drawing, a diagram B shows an 11.1V special charge-discharge protection circuit for a lithium battery pack, which has the functions of disconnection detection, high-low temperature detection and over-temperature protection, the 8 th pin of a protection IC U3 outputs voltage to the negative electrode of a power supply through a resistor R33 and a temperature sensitive resistor NTC1, the 9 th pin of the protection IC U3 detects the voltage of a resistor R33 and a temperature sensitive resistor NTC1 voltage division circuit, the battery temperature is detected and confirmed, the 1 st pin and the 3 rd pin of the protection IC U3 output high level to control a switch tube M1-4 to be conducted in the temperature range allowed to be used, so that the battery pack normally works, otherwise, the lithium battery pack is not charged and discharged, and the use safety of the.

The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.

Claims

1. The utility model provides a lithium cell boost charging circuit of portable massager, includes the lithium cell, its characterized in that still includes charges and charges indicating module and charge-discharge protection module, be provided with on the lithium cell and charge indicating module, it is connected with the power supply end of lithium cell to charge and charge indicating module, it is provided with on the charge and charge indicating module charge-discharge protection module, it includes seventh resistance R7 and the IC U2 that charges to charge and charge indicating module, external power supply's the input that charges with seventh resistance R7's first end is connected, seventh resistance R7's second end with the sixth foot of the IC U2 that charges is connected and charges, the 5 th foot of the IC U2 that charges is connected with the base of opening switch IC Q2, open switch IC Q2's projecting pole ground connection, open switch IC Q2's collecting electrode with the negative pole of the pilot LED lamp that charges is connected, the 5 th foot of the charging IC U2 is connected with the negative electrode of an external power supply, the fourth foot of the charging IC U2 is connected with the fifth resistor R5 and then grounded, the third foot of the charging IC U2 is connected with the fourth resistor R4 and then grounded, the first foot of the charging IC U2 is connected with the fourth resistor C4 and the fifth capacitor respectively and then grounded, and the first foot of the charging IC U2 is connected with the charging and discharging protection module.

2. The lithium battery boost charging circuit of a portable massager as claimed in claim 1, wherein the charge-discharge protection module comprises a third protection IC U3, a thirty-third resistor R33, a temperature-sensitive resistor NTC1 and a high-level control switch tube M1-4, the 8 th pin of the third protection IC U3 outputs voltage to the negative pole of the power supply through a resistor R33, a temperature-sensitive resistor NTC1, a 9 th pin of the protection IC U3 detects the resistor R33, and the 1 st and 3 rd pins of the protection IC U3 output high-level control switch tube M1-4 to be conducted.

3. The lithium battery boosting and charging circuit of claim 1, wherein said charging IC U2 pin 3 is connected to a fourth resistor R4.

4. The lithium battery boosting and charging circuit of claim 1, wherein said charging IC U2 is connected to a fifth resistor R5 at pin 5.