一种带锂电池充放电功能的DCUPS电源
By combining an adapter and a boost circuit, the problems of large size and unstable voltage in lithium battery chargers are solved, achieving stable voltage output and reduced cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN CORNLEY BIO MEDICAL CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium battery chargers require six lithium batteries in series to output a stable voltage, resulting in large battery size and unstable output voltage, which is affected by the remaining power of the lithium batteries.
It employs an adapter, lithium battery pack, charging circuit, boost circuit, and voltage switching circuit. The lithium battery pack is charged through the adapter and boosted through the boost circuit to achieve stable voltage output, reducing the number of lithium batteries to lower cost and size.
It achieves stable voltage output, reduces the number of batteries and the overall size of the power supply, and lowers costs.
Smart Images
Figure CN224520676U_ABST
Abstract
Claims
1. A DCUPS power supply with lithium battery charging and discharging function, characterized in that, The device includes an adapter, a lithium battery pack, a charging circuit, a boost circuit, and a voltage switching circuit. The adapter is connected to the lithium battery pack via the charging circuit. The lithium battery pack is also connected to the boost circuit. The voltage switching circuit is connected to the adapter and the boost circuit to switch the power supply between the adapter and the lithium battery pack (after being boosted by the boost circuit). The voltage switching circuit includes a dual-channel diode connected to the adapter and the boost circuit. The switching function of the dual-channel diode can switch the power supply between the lithium battery pack (after being boosted by the boost circuit) and the adapter.
2. The DCUPS power source with lithium battery charge and discharge function according to claim 1, characterized in that, The adapter has a voltage of 24V, and the lithium battery pack consists of four lithium batteries in series.
3. The DCUPS power source with lithium battery charge and discharge function according to claim 1, characterized in that, The charging circuit includes a first PMOS transistor chip, a second PMOS transistor chip, a charging chip, a first NMOS transistor chip, a second NMOS transistor chip, a first resistor, a second resistor, a first inductor, and a first capacitor. The adapter is connected to the first PMOS transistor chip. The first PMOS transistor chip is connected to the second PMOS transistor chip and the first resistor. The first resistor is connected to the second PMOS transistor chip and the charging chip. The charging chip is also connected to the first NMOS transistor chip, the second NMOS transistor chip, the first inductor, the first capacitor, and the second resistor. The first NMOS transistor chip is connected to the second NMOS transistor chip and the first inductor. The second NMOS transistor chip is connected to the first inductor. The first inductor is connected to the first capacitor. The second resistor is connected to the first inductor, the first capacitor, and the lithium battery pack.
4. The DC UPS power source with lithium battery charge and discharge function according to claim 3, characterized in that, The charging circuit further includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, and a second capacitor. The charging chip includes a HIDRV pin, a LODRV pin, an ISET1 pin, an ISET2 pin, an ACSET pin, and a TTC pin. The HIDRV pin is connected to the first NMOS transistor chip, the LODRV pin is connected to the second NMOS transistor chip, the ISET1 pin is connected to the third and fourth resistors, the ISET2 pin is connected to the fifth and sixth resistors, the ACSET pin is connected to the seventh and eighth resistors, and the TTC pin is also connected to the second capacitor.
5. The DC UPS power source with lithium battery charge and discharge function according to claim 3, characterized in that, The charging circuit further includes a first bootstrap circuit, which includes a first diode and a first bootstrap capacitor. The first diode is connected to the charging chip and the first bootstrap capacitor, and the first bootstrap capacitor is connected to the charging chip and the first NMOS transistor chip.
6. The DC UPS power source with lithium battery charge and discharge function according to claim 3, characterized in that, The charging circuit also includes a reserved circuit, which includes a third PMOS transistor chip, a ninth resistor, a tenth resistor, and a third capacitor. The third PMOS transistor chip is connected to the ninth resistor, the tenth resistor, and the third capacitor. The ninth resistor is also connected to the tenth resistor, the third capacitor, and the charging chip. The tenth resistor and the third capacitor are also connected to the first NMOS transistor chip.
7. The DCUPS power source with lithium battery charge and discharge function according to claim 1, characterized in that, The boost circuit includes a boost chip, a dual-switch MOSFET chip, a second inductor, an eleventh resistor, and a BOOST boost circuit. The lithium battery pack is connected to the boost chip and the dual-switch MOSFET chip through the second inductor. The dual-switch MOSFET chip is also connected to the BOOST boost circuit. The BOOST boost circuit includes a fourth capacitor, a fifth capacitor, a sixth capacitor, and a seventh capacitor connected in parallel. The boost chip also includes an RT / CLK pin, which is connected to the eleventh resistor.
8. The DC UPS power source with lithium battery charge and discharge function according to claim 7, characterized in that, The boost circuit also includes a twelfth resistor, a thirteenth resistor, and a fourteenth resistor connected in series, and the dual-switch MOS transistor chip is connected to the twelfth resistor, the thirteenth resistor, and the fourteenth resistor; The boost circuit also includes a second bootstrap circuit, which includes a second diode and a second bootstrap capacitor. The second diode is connected to the boost chip and the second bootstrap capacitor, and the second bootstrap capacitor is connected to the boost chip, the dual-channel switching MOSFET chip, and the second inductor. The boost circuit also includes a fifteenth resistor and a sixteenth resistor. The fifteenth resistor is connected to the boost chip, the dual-switch MOSFET chip and the second inductor, and the sixteenth resistor is connected to the boost chip and the dual-switch MOSFET chip.
9. The DCUPS power supply with lithium battery charging and discharging function according to claim 1, characterized in that, It also includes an undervoltage protection circuit, which comprises a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a reference chip, an operational amplifier, a transistor, and a voltage divider MOSFET. The boost circuit is connected to the seventeenth resistor, which is connected to the eighteenth resistor. The seventeenth and eighteenth resistors are connected to the positive input pin of the operational amplifier. The output of the operational amplifier is connected to the transistor, which is connected to the voltage divider MOSFET. The voltage divider MOSFET is connected to the dual-channel diode. The negative input pin of the operational amplifier is connected to the nineteenth resistor and the reference chip, which are interconnected.