CN220139264U - Lithium battery boosting and charging management circuit - Google Patents
Lithium battery boosting and charging management circuit Download PDFInfo
- Publication number
- CN220139264U CN220139264U CN202321409670.XU CN202321409670U CN220139264U CN 220139264 U CN220139264 U CN 220139264U CN 202321409670 U CN202321409670 U CN 202321409670U CN 220139264 U CN220139264 U CN 220139264U
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- lithium battery
- module
- management circuit
- capacitor
- output voltage
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 41
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 33
- 239000011324 bead Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of electronic circuits, and discloses a lithium battery boosting and charging management circuit, which comprises: the battery voltage acquisition module is used for detecting the residual electric quantity of the lithium battery; the input protection module, the input voltage filtering module, the power chip U1, the output voltage feedback module and the output voltage filtering module are electrically connected in sequence, and the J2 end of the input protection module is connected with the lithium battery; and the detection module is connected with the power chip U1 and is used for detecting whether the lithium battery is connected with the charger. The lithium battery boosting and charging management circuit provided by the utility model can accurately monitor the electric quantity of the lithium battery, can monitor whether the lithium battery is charged or not, and can be matched with an automatic charging module for use.
Description
Technical Field
The utility model belongs to the technical field of electronic circuits, and particularly relates to a lithium battery boosting and charging management circuit.
Background
In modern life, lithium batteries are mainstream by virtue of the advantages of small volume, high energy density, no memory effect, small pollution, long cycle life and the like, and engineers often use specific power chips and LDOs to realize the voltage boosting or reducing of the lithium batteries in some applications, and stable voltage and carrying capacity are provided according to specific requirements. In addition, boost, SEPIC, cuk and other booster conversion circuits are compared with the traditional circuits.
Common topological structures such as Boost, SEPIC and Cuk have certain defects. For example, the Boost circuit has larger output voltage fluctuation and needs to be added with an output filter circuit; while SEPIC and Cuk circuits have more complex control circuits and high cost components. The efficiency of the boost converter circuit is closely related to the input-output voltage difference, and an excessive voltage difference may lead to inefficiency. The lithium battery power is wasted when the LDO realizes the voltage increasing and decreasing of the lithium battery, because the input voltage of the LDO is always higher than the output voltage.
Disclosure of Invention
The present utility model aims to solve the above technical problems at least to some extent. To this end, the present utility model aims to provide a lithium battery boosting and charging management circuit.
The technical scheme adopted by the utility model is as follows:
a lithium battery boost and charge management circuit comprising:
the battery voltage acquisition module is used for detecting the residual electric quantity of the lithium battery;
the input protection module, the input voltage filtering module, the power chip U1, the output voltage feedback module and the output voltage filtering module are electrically connected in sequence, and the J2 end of the input protection module is connected with the lithium battery;
and the detection module is connected with the power chip U1 and is used for detecting whether the lithium battery is connected with the charger.
Preferably, the input protection module includes a fuse F1, a first diode D1, and a TVS diode Z1 connected in sequence.
Preferably, the input voltage filtering module includes at least two capacitors connected in parallel, one end of the parallel capacitor is connected to the diode D1, and the other end is grounded to GND.
Preferably, a CHARGINGTEST end of the detection module is connected with the power chip U1.
Preferably, the OC terminal of the power chip U1 is connected to the third resistor R3.
Preferably, the output voltage filtering module includes at least two capacitors connected in parallel, one end of each capacitor connected in parallel is connected with the first magnetic bead FB1 and the second magnetic bead FB2 in parallel, and the other end of each capacitor connected in parallel is grounded GND.
The beneficial effects of the utility model are as follows:
the lithium battery boosting and charging management circuit provided by the utility model can accurately monitor the electric quantity of the lithium battery; the booster circuit is stable, can stably output 5V and has stronger load capacity; the lithium battery charging system can monitor whether the lithium battery is charged or not, and can be matched with an automatic charging module for use.
Drawings
Fig. 1 is a schematic diagram of a portion of a lithium battery boost and charge management circuit of the present utility model.
FIG. 2 is a schematic diagram of a detection module of the present utility model.
Fig. 3 is a schematic diagram of a battery voltage acquisition module according to the present utility model.
Detailed Description
The utility model will be further illustrated with reference to specific examples. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
As shown in fig. 1 to 3, a lithium battery boosting and charging management circuit of the present embodiment includes an input protection module 100, a detection module 200, an input voltage filtering module 300, a battery voltage acquisition module 400, an output voltage feedback module 500, an output voltage filtering module 600, and a power supply chip U1. The battery voltage acquisition module 400 is used for detecting the residual electric quantity of the lithium battery; the input protection module 100, the input voltage filtering module 300, the power chip U1, the output voltage feedback module 500 and the output voltage filtering module 600 are electrically connected in sequence; the detection module 200 is connected to the power chip U1, and is used for detecting whether the lithium battery is connected to the charger. The lithium battery boosting and charging management circuit can monitor whether the battery is charged or not and can be matched with an automatic charging module for use.
Specifically, the model of the power chip U1 is FP6291LR-G1, the highest output voltage of the chip can reach 12v, and the overcurrent protection is adjustable by 0.5A-2.5A.
The input protection module 100 comprises a fuse F1, a first diode D1 and a TVS diode Z1 which are sequentially connected, and can effectively protect a power chip, wherein the J2 end of the input protection module 100 is connected with a lithium battery, and SW1 is a power main switch.
The CHARGINGTEST end of the detection module 200 is connected to the power chip U1 to feed back whether the charging state is being charged, and CHARGINGTEST is in a low level state when the charger is plugged in.
The input voltage filtering module 300 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5 connected in parallel, one end of the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4 and the fifth capacitor C5 connected in parallel are connected with the diode D1, the other end is grounded GND, and VCC can filter impurities after passing through the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4 and the fifth capacitor C5 to become purer voltage.
The OC terminal of the power chip U1 is connected to a third resistor R3, and the third resistor R3 is used for limiting the current in the circuit, and the allowable maximum current is 2.5A.
The battery voltage acquisition module 400 can effectively detect the residual electricity quantity of the lithium battery, and the range of the lithium battery voltage acquired by the battery voltage acquisition module is 1.3V-2.1V, wherein 1.3V is no electricity, and 2.1V is full electricity.
The output voltage feedback module 500 can maintain a stable voltage output of vout=0.6v (1+ (R1/R2)).
The output voltage filtering module 600 is configured to obtain a pure output voltage, and includes a sixth capacitor C6, a seventh capacitor C7, and an eighth capacitor C8 connected in parallel, where one end of the sixth capacitor C6, the seventh capacitor C7, and the eighth capacitor C8 is connected to the first magnetic bead FB1 and the second magnetic bead FB2 connected in parallel, and the other end of the parallel capacitor is grounded GND. The first magnetic bead FB1 and the second magnetic bead FB2 are used for absorbing interference and electrostatic pulses on some power lines.
The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model.
Claims (7)
1. A lithium battery boost and charge management circuit, comprising:
the battery voltage acquisition module (400) is used for detecting the residual electric quantity of the lithium battery;
the input protection module (100), the input voltage filtering module (300), the power chip U1, the output voltage feedback module (500) and the output voltage filtering module (600) are electrically connected in sequence, and the J2 end of the input protection module (100) is connected with the lithium battery;
and the detection module (200) is connected with the power chip U1 and is used for detecting whether the lithium battery is connected with the charger.
2. The lithium battery boost and charge management circuit of claim 1, wherein: the input protection module (100) comprises a fuse F1, a first diode D1 and a TVS diode Z1 which are sequentially connected.
3. The lithium battery boost and charge management circuit of claim 2, wherein: the input voltage filtering module (300) comprises at least two capacitors connected in parallel, one end of each capacitor connected in parallel is connected with the diode D1, and the other end of each capacitor is grounded to the GND.
4. The lithium battery boost and charge management circuit of claim 1, wherein: the CHARGINGTEST end of the detection module (200) is connected with the power chip U1.
5. The lithium battery boost and charge management circuit of claim 1, wherein: and the OC end of the power chip U1 is connected with a third resistor R3.
6. The lithium battery boost and charge management circuit of claim 1, wherein: the output voltage filtering module (600) comprises at least two capacitors which are connected in parallel, one end of each capacitor is connected with the first magnetic bead FB1 and the second magnetic bead FB2 which are connected in parallel, and the other end of each capacitor which is connected in parallel is grounded to GND.
7. The lithium battery boost and charge management circuit of claim 1, wherein: the model of the power supply chip U1 is FP6291LR-G1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321409670.XU CN220139264U (en) | 2023-06-03 | 2023-06-03 | Lithium battery boosting and charging management circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321409670.XU CN220139264U (en) | 2023-06-03 | 2023-06-03 | Lithium battery boosting and charging management circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220139264U true CN220139264U (en) | 2023-12-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321409670.XU Active CN220139264U (en) | 2023-06-03 | 2023-06-03 | Lithium battery boosting and charging management circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220139264U (en) |
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2023
- 2023-06-03 CN CN202321409670.XU patent/CN220139264U/en active Active
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