电压转换电路及电源设备
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 杭州普联系统技术有限公司
- Filing Date
- 2025-03-31
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional power supply equipment has difficulty accurately obtaining battery power, especially when lithium batteries are used to power multiple devices. The multi-cell series connection scheme has high consistency requirements and aging differences affect capacity utilization. The constant voltage output scheme needs to integrate a power detection device.
A voltage conversion module and a division operation module are used to adjust the output voltage by the ratio of the feedback voltage to the input voltage, so as to achieve a fixed proportional relationship between the output voltage and the input voltage, and to determine the battery charge using the output voltage.
It enables accurate acquisition of battery power without relying on lithium battery consistency, simplifies the power detection process, and improves battery utilization and detection accuracy.
Smart Images
Figure CN224520933U_ABST
Abstract
Claims
1. A voltage conversion circuit, characterized by, include: A voltage conversion module is used to convert the input voltage according to the feedback voltage at the feedback terminal to obtain the output voltage; A division operation module is connected to the input terminal, output terminal, and feedback terminal of the voltage conversion module. The division operation module is configured to obtain and output the feedback voltage based on the ratio of the output voltage to the input voltage, and the feedback voltage is positively correlated with the ratio. The division operation module includes an analog circuit, which is connected to the input terminal, output terminal, and feedback terminal of the voltage conversion module, respectively. The analog circuit is configured to obtain and output the feedback voltage based on the ratio between the output voltage and the input voltage. The analog circuit includes a multiplier, an operational amplifier, a first resistor, a second resistor, and a capacitor; The first input terminal of the multiplier is connected to the output terminal of the operational amplifier, the second input terminal of the multiplier is connected to the output terminal of the voltage conversion module, and the output terminal of the multiplier is connected to the inverting input terminal of the operational amplifier through the first resistor. The inverting input terminal of the operational amplifier is also grounded through the second resistor, and the non-inverting input terminal of the operational amplifier is connected to the input terminal of the voltage conversion module and grounded through the capacitor.
2. The voltage conversion circuit of claim 1, wherein, The voltage conversion module is configured to adjust the output voltage based on the difference between the feedback voltage and the reference voltage, wherein the output voltage is negatively correlated with the difference.
3. The voltage conversion circuit of claim 1, wherein, The division operation module includes a digital circuit, which is connected to the input terminal, output terminal, and feedback terminal of the voltage conversion module. The digital circuit is configured to obtain and output the feedback voltage based on the ratio between the output voltage and the input voltage.
4. The voltage conversion circuit of claim 3, wherein, The digital circuit includes a sampling unit and a computing unit; The sampling unit is connected to the output and input terminals of the voltage conversion module, and is used to obtain a first sampled digital signal based on the input voltage and a second sampled digital signal based on the output voltage. The calculation unit obtains the feedback voltage based on the ratio of the second sampled digital signal to the first sampled digital signal.
5. The voltage conversion circuit according to any one of claims 1 to 4, wherein The voltage conversion module includes a transformer chip. The input terminal of the transformer chip is used to connect to the input voltage. The feedback terminal of the transformer chip is connected to the division operation module. The transformer chip is used to convert the input voltage according to the feedback voltage of the feedback terminal to obtain the output voltage.
6. A power supply device characterized by comprising: It includes a power supply and a voltage conversion circuit as described in any one of claims 1 to 5, wherein the power supply is connected to the input terminal of the voltage conversion circuit and the power supply is used to provide an input voltage.
7. The power supply apparatus of Claim 6, wherein The power supply includes multiple batteries connected in parallel.
8. The power supply apparatus of Claim 7, wherein The negative terminal of each battery is grounded, and the positive terminal of each battery is connected to the input terminal of the voltage conversion circuit.