CN216872881U - Universal dual-power management circuit - Google Patents
Universal dual-power management circuit Download PDFInfo
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- CN216872881U CN216872881U CN202123400542.2U CN202123400542U CN216872881U CN 216872881 U CN216872881 U CN 216872881U CN 202123400542 U CN202123400542 U CN 202123400542U CN 216872881 U CN216872881 U CN 216872881U
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Abstract
The utility model discloses a universal dual-power management circuit, which comprises an interface circuit, a lithium battery charging and protecting circuit, an external power supply circuit, a dual-power automatic switching circuit, an indicating circuit, a 5V power circuit and a 3.3V power circuit, wherein the lithium battery charging and protecting circuit is connected with the external power supply circuit; the interface circuit, the lithium battery charging and protecting circuit, the external power supply circuit, the indicating circuit, the 5V power supply circuit and the 3.3V power supply circuit are respectively connected with the double-power automatic switching circuit, the 5V power supply circuit and the 3.3V power supply circuit are respectively connected with the indicating circuit, and the lithium battery charging and protecting circuit and the external power supply circuit are also respectively connected with the interface circuit. The scheme provided by the utility model can realize high-power lithium battery management and protection circuits which can meet various application occasions.
Description
Technical Field
The utility model relates to the field of power management, in particular to a universal dual-power management circuit.
Background
In the high-speed development society of electronic power, a power supply is a vital part for each electrical device, and in combination with the power supply requirements of each device of a company and in order to meet various power supply requirements, a high-power lithium battery management and protection circuit with adjustable multiple voltages and large current which can meet various application occasions needs to be designed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a universal dual-power management circuit which comprises an interface circuit, a lithium battery charging and protecting circuit, an external power supply circuit, a dual-power automatic switching circuit, an indicating circuit, a 5V power circuit and a 3.3V power circuit; the interface circuit, the lithium battery charging and protecting circuit, the external power supply circuit, the indicating circuit, the 5V power supply circuit and the 3.3V power supply circuit are respectively connected with the double-power automatic switching circuit, the 5V power supply circuit and the 3.3V power supply circuit are respectively connected with the indicating circuit, and the lithium battery charging and protecting circuit and the external power supply circuit are also respectively connected with the interface circuit.
Preferably, the interface circuit comprises an external power input interface, a circuit main output interface, a battery interface, a 5V voltage output interface and a 3.3V voltage output interface; the lithium battery charging and protecting circuit and the external power supply circuit are respectively connected with the input interface of the external power supply, the 5V power supply circuit is connected with the 5V voltage output interface, the 3.3V power supply circuit is connected with the 3.3V voltage output interface, and the dual-power automatic switching circuit is connected with the main output interface of the circuit; the lithium battery charging and protecting circuit is also connected with the battery interface.
Preferably, the dual-power automatic switching circuit comprises a field effect transistor I and a field effect transistor II; the D end of the first field effect transistor is connected with the lithium battery charging and protecting circuit, the S end of the first field effect transistor is connected with the S end of the second field effect transistor, the D end of the second field effect transistor is connected with the external power supply circuit, and the main output interface of the circuit is connected with the D end of the second field effect transistor; and the G end of the first field effect transistor and the G end of the second field effect transistor are respectively grounded.
Preferably, the lithium battery charging and protecting circuit comprises a battery charging controller, the input end of the battery charging controller is connected with the external power input interface, and the D end and the battery interface of the field effect transistor I are respectively connected with the output end of the battery charging controller.
Preferably, the external power supply circuit comprises a voltage reduction power supply controller, a field effect transistor III and a field effect transistor IV; the input end of the voltage reduction power supply controller and the D end of the third field effect transistor are respectively connected with the external power supply input interface, the G end of the third field effect transistor is connected with the voltage reduction power supply controller, and the S end of the third field effect transistor is connected with the D end of the fourth field effect transistor; the G end of the field effect transistor IV is connected with the voltage reduction power supply controller, and the S end of the field effect transistor IV is grounded; and the D end of the field effect transistor IV is connected with the D end of the field effect transistor II.
The beneficial effects of the utility model are: the scheme provided by the utility model can realize high-power lithium battery management and protection circuits which can meet various application occasions.
Drawings
FIG. 1 is a schematic diagram of a general dual power management circuit;
FIG. 2 is a diagram of a lithium battery charging and protection circuit;
FIG. 3 is a power supply circuit diagram of an external power supply;
FIG. 4 is a circuit diagram of dual power automatic switching;
FIG. 5 is a circuit diagram of a 5V power supply;
FIG. 6 is a circuit diagram of a 3.3V power supply;
FIG. 7 is a circuit diagram of a signal indicating circuit;
FIG. 8 is a circuit diagram of an interface circuit;
fig. 9 is a diagram of an over-discharge protection circuit.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention. It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are further described in detail in the following examples
As shown in fig. 1, the universal dual power management circuit includes an interface circuit, a lithium battery charging and protecting circuit, an external power supply circuit, a dual power automatic switching circuit, an indicating circuit, a 5V power circuit, and a 3.3V power circuit; the interface circuit, the lithium battery charging and protecting circuit, the external power supply circuit, the indicating circuit, the 5V power supply circuit and the 3.3V power supply circuit are respectively connected with the double-power automatic switching circuit, the 5V power supply circuit and the 3.3V power supply circuit are respectively connected with the indicating circuit, and the lithium battery charging and protecting circuit and the external power supply circuit are also respectively connected with the interface circuit.
The interface circuit is shown in fig. 8 and comprises an external power supply input interface, a circuit main output interface, a battery interface, a 5V voltage output interface and a 3.3V voltage output interface; the lithium battery charging and protecting circuit and the external power supply circuit are respectively connected with the input interface of the external power supply, the 5V power supply circuit is connected with the 5V voltage output interface, the 3.3V power supply circuit is connected with the 3.3V voltage output interface, and the dual-power automatic switching circuit is connected with the main output interface of the circuit; the lithium battery charging and protecting circuit is also connected with the battery interface.
The dual-power automatic switching circuit is shown in fig. 4 and comprises a field effect tube I and a field effect tube II; the D end of the first field effect transistor is connected with the lithium battery charging and protecting circuit, the S end of the first field effect transistor is connected with the S end of the second field effect transistor, the D end of the second field effect transistor is connected with the external power supply circuit, and the main output interface of the circuit is connected with the D end of the second field effect transistor; and the G end of the first field effect transistor and the G end of the second field effect transistor are respectively grounded.
The lithium battery charging and protecting circuit is shown in fig. 2 and comprises a battery charging controller, wherein the input end of the battery charging controller is connected with an external power supply input interface, and the D end and the battery interface of the field effect transistor I are respectively connected with the output end of the battery charging controller.
The external power supply circuit is shown in fig. 3 and comprises a voltage reduction power supply controller, a field effect transistor III and a field effect transistor IV; the input end of the third field effect transistor is connected with the input interface of the external power supply, the G end of the third field effect transistor is connected with the voltage reduction power supply, and the S end of the third field effect transistor is connected with the D end of the fourth field effect transistor; the G end of the field effect transistor IV is connected with the voltage reduction power supply controller, and the S end of the field effect transistor IV is grounded; and the D end of the field effect transistor IV is connected with the D end of the field effect transistor II.
Specifically, a BQ24610RGE chip is adopted as a main control chip of the lithium battery charging circuit in the high-power lithium battery management circuit; LM315 is used as an external power supply chip; a 5V power output circuit adopting PW 2163; a 3.3V power output circuit adopting TPL740F33-89 TR; the automatic switching circuit for power supply of the battery built by the MOS tube and power supply of the external power supply, the indicating circuit and the interface circuit are adopted. In order to avoid the mutual interference generated by the lithium battery and the power supply for the equipment during the charging process, a double-circuit power supply design is adopted. The circuit can realize the input of external voltage of 6.6V-30V, and is mainly used for power supply parts in multiple fields. This circuit can each required voltage of effectual providing, can realize 120W's high-power supply, in the charging process, sample through R29 current-limiting resistance both ends, can effectual restriction charging current, avoid overflowing, in order to reach the guard action to the lithium cell, can set for trickle charge through BQ24610RDE chip, constant voltage charging, the constant current charge time, when charging current is less than below 10mA, the automatic disconnection charges, avoid the lithium cell overcharge to produce the damage, be used for the temperature of monitoring battery and charging connection department through RT temperature resistance and avoid the high temperature. Through lithium cell and external power supply automatic switch-over circuit, can avoid under the condition of external power supply, the lithium cell fill the limit when putting the damage to with the lithium cell, reach the purpose of protection lithium cell, adopt voltage limiting circuit when only battery power supply, can effectual automated inspection lithium cell condition of discharging, when being less than and setting for discharge voltage, can the automatic disconnection battery power supply to reach and avoid putting the damage to the battery.
The dual power automatic switching circuit is such that when VIN is powered (connected to an external power supply), the NMOS Q1 is turned on. The G end of the PMOS Q5 is pulled down, the Q5 is conducted, the conducting voltage drop of the grid electrode of the Q4 and the source electrode of the Q3 is very small, so that the Q4 is closed, the power supply of the battery is cut off, and the external power supply supplies power at the moment. When VIN is off (external power is off), VIN is off, Q6 is off, G stage of PMOS Q4 is pulled down by R14, Q4 is on, G stage of Q3 is pulled up by R13, and Q3 is off. The power source is powered by a battery.
The 5V power supply circuit is shown in fig. 5, and adopts a 5V voltage output circuit of PW2162, which can provide 5V and 3A power supply outputs enough to meet the requirements of each circuit, and the output voltage is calculated as follows: VOUT is (1+ R17/R19), and passes through a voltage regulation filter circuit, so that low ripple power is achieved.
The 3.3V power supply circuit is shown in fig. 6, the LDO of TPL740F33-89TR is adopted as the 3.3V power supply circuit, the chip can output stable 3.3V and 500mA power, has a noise suppression ratio of 60dB, can achieve output ripple of about 10mV, and can be used for radio frequency and circuits with higher requirements on ripple.
The signal indicating circuit is shown in fig. 7, and mainly realizes charging and full-charge light indication, wherein a red light is on when charging, a green light is on when fully charging, and no red or green light indicates that the battery is not connected. When the blue and red lights are on, it indicates that 3.3V and 5V power sources are generated in the circuit.
The lithium battery charging and protecting circuit particularly comprises an over-discharge protecting circuit, and as shown in fig. 9, the discharge protecting circuit is arranged between the lithium battery charging and protecting circuit and the dual-power automatic switching circuit. The over-discharge protection method is used for over-discharge protection of the lithium battery.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the utility model is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (5)
1. The universal dual-power management circuit is characterized by comprising an interface circuit, a lithium battery charging and protecting circuit, an external power supply circuit, a dual-power automatic switching circuit, an indicating circuit, a 5V power circuit and a 3.3V power circuit; the interface circuit, the lithium battery charging and protecting circuit, the external power supply circuit, the indicating circuit, the 5V power supply circuit and the 3.3V power supply circuit are respectively connected with the double-power automatic switching circuit, the 5V power supply circuit and the 3.3V power supply circuit are respectively connected with the indicating circuit, and the lithium battery charging and protecting circuit and the external power supply circuit are also respectively connected with the interface circuit.
2. The universal dual power management circuit according to claim 1, wherein the interface circuit comprises an external power input interface, a circuit main output interface, a battery interface, a 5V voltage output interface, a 3.3V voltage output interface; the lithium battery charging and protecting circuit and the external power supply circuit are respectively connected with the input interface of the external power supply, the 5V power supply circuit is connected with the 5V voltage output interface, the 3.3V power supply circuit is connected with the 3.3V voltage output interface, and the dual-power automatic switching circuit is connected with the main output interface of the circuit; the lithium battery charging and protecting circuit is also connected with the battery interface.
3. The universal dual-power management circuit according to claim 2, wherein the dual-power automatic switching circuit comprises a first field effect transistor and a second field effect transistor; the D end of the first field effect transistor is connected with the lithium battery charging and protecting circuit, the S end of the first field effect transistor is connected with the S end of the second field effect transistor, the D end of the second field effect transistor is connected with the external power supply circuit, and the main output interface of the circuit is connected with the D end of the second field effect transistor; and the G end of the first field effect transistor and the G end of the second field effect transistor are respectively grounded.
4. The universal dual power management circuit of claim 3, wherein the lithium battery charging and protection circuit comprises a battery charging controller, an input terminal of the battery charging controller is connected to an external power input interface, and a D terminal of the first field effect transistor and a battery interface are respectively connected to an output terminal of the battery charging controller.
5. The universal dual-power management circuit according to claim 4, wherein the external power supply circuit comprises a voltage reduction power supply controller, a field effect transistor III and a field effect transistor IV; the input end of the third field effect transistor is connected with the input interface of the external power supply, the G end of the third field effect transistor is connected with the voltage reduction power supply, and the S end of the third field effect transistor is connected with the D end of the fourth field effect transistor; the G end of the field effect transistor IV is connected with the voltage reduction power supply controller, and the S end of the field effect transistor IV is grounded; and the D end of the field effect transistor IV is connected with the D end of the field effect transistor II.
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| CN202123400542.2U CN216872881U (en) | 2021-12-30 | 2021-12-30 | Universal dual-power management circuit |
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| CN202123400542.2U CN216872881U (en) | 2021-12-30 | 2021-12-30 | Universal dual-power management circuit |
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| CN216872881U true CN216872881U (en) | 2022-07-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116317032A (en) * | 2023-05-17 | 2023-06-23 | 中国人民解放军国防科技大学 | Faraday capacitor electric energy constant power storage and release control method |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116317032A (en) * | 2023-05-17 | 2023-06-23 | 中国人民解放军国防科技大学 | Faraday capacitor electric energy constant power storage and release control method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Universal dual power management circuit Effective date of registration: 20230411 Granted publication date: 20220701 Pledgee: Chengdu financial holding Financing Guarantee Co.,Ltd. Pledgor: Sichuan Weijing Technology Co.,Ltd. Registration number: Y2023510000096 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |