Voltage control circuit and vehicle
By designing a voltage control circuit and connecting it with the third switch using a step-up and buck circuit, the problem of mismatch between the charging pile voltage and the power battery pack voltage is solved, and the charging compatibility and charging performance are improved.
CN118700866BActive Publication Date: 2025-04-29XIAOMI EV TECH CO LTD
Patent Information
- Application Number
- CN202411156004.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2044-08-21
AI Technical Summary
Technical Problem
In the prior art, the voltage of the charging pile does not match the voltage of the power battery pack, resulting in low charging efficiency.
Method used
A voltage control circuit is designed, including a power battery pack, switch, drive circuit and step-up circuit. It is connected to the third switch through the step-up circuit to achieve step-up and step-up voltage of the charging pile is compatible with charging piles of different voltage platforms.
Benefits of technology
Without increasing the charging cost, the charging compatibility is achieved, and the full performance of the charging pile is fully utilized to shorten the charging time.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN118700866B_ABST
Abstract
The present disclosure relates to a voltage control circuit and a vehicle, wherein the voltage control circuit comprises: a power battery pack; a first switch K1, wherein the first switch K1 is connected to the positive electrode of the power battery pack; a second switch K2, wherein the second switch K2 is connected to the negative electrode of the power battery pack; a third switch K3, wherein the third switch K3 is respectively connected to the first switch K1 and the positive electrode of the power battery pack; a drive circuit, wherein the drive circuit comprises a three-phase inverter, a three-phase motor and a first capacitor Cx, wherein the first capacitor Cx is respectively connected to the first switch K1 and a first bus terminal, and the second switch K2 and a second bus terminal; a buck-boost circuit, wherein a first end of the buck-boost circuit is connected to a second end of the third switch K3, a second end of the buck-boost circuit is connected to the first bus terminal, a third end of the buck-boost circuit is connected to the second bus terminal, and a fourth end of the buck-boost circuit is connected to a charging port, and the voltage control circuit can achieve charging compatibility and give full play to the full performance of a charging pile without increasing the charging cost.
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Citation Information
Patent Citations
Vehicle electric driving system and charging control method
CN118124415A
Device and method for DC-DC conversion of a direct current for a vehicle battery of an electric vehicle
DE102018207185A1