CN210430980U - Rechargeable battery power supply device - Google Patents
Rechargeable battery power supply device Download PDFInfo
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- CN210430980U CN210430980U CN201921741661.4U CN201921741661U CN210430980U CN 210430980 U CN210430980 U CN 210430980U CN 201921741661 U CN201921741661 U CN 201921741661U CN 210430980 U CN210430980 U CN 210430980U
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Abstract
The utility model relates to a power supply technical field, the utility model discloses aim at solving the current higher problem of power supply mode cost that has rechargeable battery, provide a rechargeable battery power supply unit, include: the adapter power input port, battery module, voltage comparison circuit, the management module that charges, on-off control circuit and power output port, adapter power input port respectively with voltage comparison circuit's first input end, the power input end and the power output port of the management module that charges are connected, battery module respectively with voltage comparison circuit's second input end, the output of the management module that charges and on-off control circuit's one end are connected, voltage comparison circuit's output is connected with the signal input part of the management module that charges, the control end of the management module that charges is connected with on-off control circuit's control end, on-off control circuit's the other end is connected with power output port. The utility model discloses need not to set up the controller that contains complicated procedure, reduced supply circuit's cost.
Description
Technical Field
The utility model relates to a power supply technical field relates to a rechargeable battery power supply unit particularly.
Background
Along with the continuous popularization of the application of portable electronic products, the demand of people on product differentiation is also increased, and portable small-size mobile terminals with different shapes are produced at the same time, so that the product differentiation is realized, and certain consumer groups are met. The rechargeable battery is used in mobile terminal products, because the rechargeable battery has a low cost and meets the use requirements of the mobile terminal.
In order to solve the problem that the service life of a rechargeable battery is shortened due to the fact that the mobile terminal is still powered by the rechargeable battery under the condition that the mobile terminal is connected with a charger, in the prior art, a controller is mainly arranged inside the charger and detects the charging voltage of the charger, when the charging voltage of the charger is larger than a preset value, the controller sends a corresponding control signal to a battery charging management module, and the battery charging management module controls a power supply loop of the rechargeable battery and a load to be disconnected, so that the load is powered only through the charging voltage.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a rechargeable battery power supply unit makes it can solve the current higher problem of power supply mode cost that has rechargeable battery after using corresponding software method.
The utility model provides a technical scheme that above-mentioned technical problem adopted is: a rechargeable battery powered device comprising: adapter power input port, battery module, voltage comparison circuit, charge management module, on-off control circuit and power output port, when adapter power input port has input voltage, its input voltage is greater than the output voltage after battery module is full of the electricity, adapter power input port is connected with voltage comparison circuit's first input, charge management module's power input end and power output port respectively, battery module is connected with voltage comparison circuit's second input, charge management module's output and on-off control circuit's one end respectively, voltage comparison circuit's output is connected with charge management module's signal input part, charge management module's control end and on-off control circuit's control end are connected, on-off control circuit's the other end and power output port are connected.
Further, to realize the comparison between the charging voltage and the battery voltage, the voltage comparison circuit includes: voltage comparator, first resistance, second resistance, third resistance and fourth resistance, voltage comparator's positive pole is connected with the one end of first resistance to through second resistance ground connection, the other end of first resistance is voltage comparison circuit's first input, voltage comparator's negative pole is connected with the one end of third resistance to through fourth resistance ground connection, the other end of third resistance is voltage comparison circuit's second input, voltage comparator's output is voltage comparison circuit's output.
Furthermore, in order to realize effective on-off control of a power supply loop of the battery module, the switch control circuit is a PMOS transistor with a built-in parasitic diode, a grid electrode of the PMOS transistor is a control end of the switch control circuit, a positive electrode of the battery module is connected with a drain electrode of the PMOS transistor, a negative electrode of the battery module is grounded, and a source electrode of the PMOS transistor is connected with a power output port.
Furthermore, in order to meet different power supply requirements, the power supply device further comprises a voltage reduction circuit and a voltage boosting constant current circuit, wherein the voltage reduction circuit and the voltage boosting constant current circuit are respectively connected with the power supply output port.
The utility model has the advantages that: chargeable battery power supply unit, through simple voltage comparison circuit, can detect whether the adapter has charging voltage, whether the user connects the adapter, when detecting the adapter has charging voltage, with the power supply circuit disconnection of battery module, and then improve battery module's life, the utility model discloses need not to set up the controller that contains complicated procedure and come to have external power supply's detection, reduced supply circuit's cost.
Drawings
Fig. 1 is a schematic structural diagram of a rechargeable battery power supply device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a voltage comparison circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a switch control circuit according to an embodiment of the present invention;
description of reference numerals:
r1 — first resistance; r2 — second resistance; r3 — third resistance; r4-plus fourth resistor; x1-voltage comparator; Q1-PMOS transistor.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Rechargeable battery power supply unit, include: adapter power input port, battery module, voltage comparison circuit, charge management module, on-off control circuit and power output port, when adapter power input port has input voltage, its input voltage is greater than the output voltage after battery module is full of the electricity, adapter power input port is connected with voltage comparison circuit's first input, charge management module's power input end and power output port respectively, battery module is connected with voltage comparison circuit's second input, charge management module's output and on-off control circuit's one end respectively, voltage comparison circuit's output is connected with charge management module's signal input part, charge management module's control end and on-off control circuit's control end are connected, on-off control circuit's the other end and power output port are connected.
Specifically, when the user connects the adapter to the external power supply, the power input port of the adapter has an input voltage, which is greater than the voltage of the fully charged battery module. The voltage comparison circuit compares the input voltage of the power input port of the adapter with the voltage of the battery module in real time, when the fact that the input voltage of the power input port of the adapter is larger than the voltage of the battery module is detected, the voltage comparison circuit outputs a high level signal to indicate that the adapter has an external power supply at the moment, after a corresponding software method is applied, the charging management module receives the high level signal and outputs a corresponding switch control signal to disconnect the switch control circuit, a power supply loop of the battery module is disconnected, the input voltage of the power input port of the adapter supplies power to a load and charges the battery module, and the battery module stops supplying power to the load. When the input voltage of the power supply input port of the adapter is detected to be smaller than the voltage of the battery module, the voltage comparison circuit outputs a low level signal to indicate that the adapter does not have an external power supply at the moment, and the charging management module outputs a corresponding switch control signal after receiving the low level signal to enable the switch control circuit to be conducted, so that a power supply loop of the battery module is conducted, and the battery module supplies power to the load.
Examples
The embodiment of the utility model provides a rechargeable battery power supply unit, as shown in figure 1, include: adapter power input port, battery module, voltage comparison circuit, charge management module, on-off control circuit and power output port, when adapter power input port has input voltage, its input voltage is greater than the output voltage after battery module is full of the electricity, adapter power input port is connected with voltage comparison circuit's first input, charge management module's power input end and power output port respectively, battery module is connected with voltage comparison circuit's second input, charge management module's output and on-off control circuit's one end respectively, voltage comparison circuit's output is connected with charge management module's signal input part, charge management module's control end and on-off control circuit's control end are connected, on-off control circuit's the other end and power output port are connected.
The adapter power input port is used for being connected with the adapter to input charging voltage provided by the adapter, and the power output port is used for being connected with a load to supply power to the load. When the adapter is connected with an input power supply, the input port of the power supply of the adapter inputs charging voltage, and the input charging voltage is greater than the voltage of the fully charged battery module.
In the using process, the voltage comparison circuit compares the input voltage of the power input port of the adapter with the voltage of the battery module in real time, when the input voltage of the power input port of the adapter is detected to be greater than the voltage of the battery module, the fact that the adapter is connected with an external power supply at the moment is indicated, the input voltage of the power input port of the adapter is provided with the input voltage, the voltage comparison circuit outputs a high-level signal to the charging management module, after a corresponding software method is applied, the charging management module receives the high-level signal and outputs a corresponding control signal to enable the switch control circuit to be connected, a power supply loop of the battery module is further disconnected, the input voltage of the power input port of the adapter supplies power to a load, and the input voltage of the power input port of the.
Optionally, as shown in fig. 2, the voltage comparison circuit includes: the voltage comparator comprises a voltage comparator X1, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, wherein the anode of the voltage comparator X1 is connected with one end of the first resistor R1 and is grounded through the second resistor R2, the other end of the first resistor R1 is a first input end of the voltage comparison circuit, the cathode of the voltage comparator X1 is connected with one end of the third resistor R3 and is grounded through the fourth resistor R4, the other end of the third resistor R3 is a second input end of the voltage comparison circuit, and the output end of the voltage comparator X1 is an output end of the voltage comparison circuit.
The first resistor R1 and the second resistor R2 are used for dividing the input voltage of the power input port of the adapter, the third resistor R3 and the fourth resistor R4 are used for dividing the output voltage of the battery, the resistance values of the first resistor R1 and the third resistor R3 are equal, the resistance values of the second resistor R2 and the fourth resistor R4 are equal, the input voltage of the power input port of the adapter is divided and then input to the anode of the voltage comparator X1, the output voltage of the battery module is divided and then input to the cathode of the voltage comparator X1, and when the voltage of the anode of the voltage comparator X1 is greater than the voltage of the cathode, the voltage comparator X1 outputs a high-level signal to the charge management module; conversely, when the positive voltage of the voltage comparator X1 is less than the negative voltage, the voltage comparator X1 outputs a low signal to the charge management module.
Optionally, as shown in fig. 3, the switch control circuit is a PMOS transistor Q1 with a built-in parasitic diode, a gate of the PMOS transistor Q1 is a control terminal of the switch control circuit, an anode of the battery module is connected to a drain of the PMOS transistor Q1, a cathode of the battery module is grounded, and a source of the PMOS transistor Q1 is connected to the power output port.
It can be understood that, after receiving the high level signal sent by the voltage comparator, the charge management module correspondingly outputs a high level signal to the gate of the PMOS transistor Q1 at the control port, at this time, the PMOS transistor Q1 is turned off, so that the power supply loop between the battery module and the load is disconnected, and the load is powered by the input voltage at the power input port of the adapter. After receiving the low level signal sent by the voltage comparator, the charging management module correspondingly outputs the low level signal to the gate of the PMOS transistor Q1 through the control port of the charging management module, and at this time, the PMOS transistor Q1 is turned on, so that a power supply loop between the battery module and the load is turned on, and the battery module supplies power to the load.
The built-in parasitic diode is used for preventing voltage backflow when the power input port of the adapter is provided with input voltage, and the service life of the battery module is further prolonged.
Optionally, in order to meet power supply requirements of different devices of the mobile terminal, the mobile terminal further comprises a voltage reduction circuit and a voltage boosting constant current circuit, wherein the voltage reduction circuit and the voltage boosting constant current circuit are respectively connected with the power output port.
The voltage reduction circuit is used for reducing the output voltage of the power output port, the input end of the voltage reduction circuit is connected with the power output port, the output end of the voltage reduction circuit can be used for supplying power to an LED lamp bar of a display screen of the mobile terminal, the voltage boosting constant current circuit is used for boosting the output voltage of the power output port and controlling constant current, and the voltage boosting constant current circuit can be used for supplying power to a controller of the mobile terminal.
It should be noted that the present invention provides a specific structure of a rechargeable battery power supply device, wherein the related modules are hardware system modules or functional modules combining a computer software program or protocol with hardware in the prior art, and the computer software program or protocol related to the functional modules is known to those skilled in the art, and is not an improvement of the present system, and is not described herein again; the improvement of the system is the interaction relation or the connection relation among all the modules, namely the integral structure of the system is improved, so as to solve the corresponding technical problems to be solved by the system.
Claims (4)
1. A rechargeable battery powered device, comprising: adapter power input port, battery module, voltage comparison circuit, charge management module, on-off control circuit and power output port, when adapter power input port has input voltage, its input voltage is greater than the output voltage after battery module is full of the electricity, adapter power input port is connected with voltage comparison circuit's first input, charge management module's power input end and power output port respectively, battery module is connected with voltage comparison circuit's second input, charge management module's output and on-off control circuit's one end respectively, voltage comparison circuit's output is connected with charge management module's signal input part, charge management module's control end and on-off control circuit's control end are connected, on-off control circuit's the other end and power output port are connected.
2. The rechargeable battery powered device of claim 1 wherein the voltage comparison circuit comprises: voltage comparator, first resistance, second resistance, third resistance and fourth resistance, voltage comparator's positive pole is connected with the one end of first resistance to through second resistance ground connection, the other end of first resistance is voltage comparison circuit's first input, voltage comparator's negative pole is connected with the one end of third resistance to through fourth resistance ground connection, the other end of third resistance is voltage comparison circuit's second input, voltage comparator's output is voltage comparison circuit's output.
3. The rechargeable battery power supply of claim 1 wherein the switch control circuit is a PMOS transistor with a parasitic diode built therein, the gate of the PMOS transistor is the control terminal of the switch control circuit, the anode of the battery module is connected to the drain of the PMOS transistor, the cathode of the battery module is connected to ground, and the source of the PMOS transistor is connected to the power output port.
4. The rechargeable battery power supply of claim 1 further comprising a buck circuit and a boost constant current circuit, the buck and boost constant current circuits being connected to the power output port, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921741661.4U CN210430980U (en) | 2019-10-16 | 2019-10-16 | Rechargeable battery power supply device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921741661.4U CN210430980U (en) | 2019-10-16 | 2019-10-16 | Rechargeable battery power supply device |
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| CN210430980U true CN210430980U (en) | 2020-04-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112039166A (en) * | 2020-09-14 | 2020-12-04 | 珠海格力电器股份有限公司 | Charging circuit |
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2019
- 2019-10-16 CN CN201921741661.4U patent/CN210430980U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112039166A (en) * | 2020-09-14 | 2020-12-04 | 珠海格力电器股份有限公司 | Charging circuit |
| CN112039166B (en) * | 2020-09-14 | 2022-08-16 | 珠海格力电器股份有限公司 | Charging circuit |
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