Battery charging control method and circuit, and battery system and electric apparatus
By connecting an external energy device in series with an energy storage circuit and controlling its switching, the battery can be boosted and charged, and heated at low temperatures, thus solving the problem of low battery charging efficiency and improving the battery's charging and heating efficiency.
WO2026113962A1PCT designated stage Publication Date: 2026-06-04CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2025-11-13
- Publication Date
- 2026-06-04
AI Technical Summary
Technical Problem
Low battery charging efficiency, especially when the output voltage of the charging device is too low, leads to slow charging speed and voltage mismatch.
Method used
An external energy device forms a loop with the first energy storage circuit. A switching circuit controls the external energy device to charge the first energy storage circuit, and the two circuits are connected in series to charge the battery together, achieving boost charging. At the same time, heating is performed when the battery temperature is low to improve charging efficiency.
Benefits of technology
It improves battery charging and heating efficiency, simplifies charging control methods, and ensures energy balance and stability among battery packs.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN2025134719_04062026_PF_FP_ABST
Abstract
The present application belongs to the technical field of batteries. Provided are a battery charging control method and circuit, and a battery system and an electric apparatus. A battery is connected to a first switch circuit, which comprises a first connection point, a second connection point and a third connection point that are connected to each other by means of switch elements, wherein the first connection point is connected to a positive electrode of the battery, and the second connection point is connected to a negative electrode of the battery. A second terminal of a first energy storage circuit is further connected to a first terminal of a second switch circuit; a second terminal of the second switch circuit is connected to the midpoint between a first battery pack and a second battery pack; the first connection point or the second connection point is further connected to a first terminal of an external energy apparatus, and the third connection point is connected to a first terminal of the first energy storage circuit; and the second terminal of the first energy storage circuit is connected to a second terminal of the external energy apparatus. The method comprises: by means of a first switch circuit, operating an external energy apparatus to charge a first energy storage circuit, and operating the external energy apparatus and the first energy storage circuit to jointly charge a battery.
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