Method and apparatus for state control
By locking the AC/DC converter in the hot standby state of the energy storage unit, the problem of shortened lifespan caused by micro-charging and micro-discharging of lithium-ion batteries is solved, and the battery performance is improved.
CN122158754APending Publication Date: 2026-06-05CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2024-12-03
- Publication Date
- 2026-06-05
AI Technical Summary
Technical Problem
In existing technologies, lithium-ion batteries are continuously in a state of micro-charging or micro-discharging when in hot standby mode, which leads to a shortened cycle life and affects battery performance.
Method used
When both the active and reactive power of the energy storage unit are zero, the AC/DC conversion device in the target energy storage submodule is locked to achieve electrical isolation between the DC and AC sides. The locking and unlocking of the AC/DC conversion device is achieved through signal interaction.
Benefits of technology
It effectively reduces the possibility of the battery being in a state of continuous micro-charging and micro-discharging, improves the battery's cycle life and performance, and is low in cost and highly efficient.
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Smart Images
Figure CN122158754A_ABST
Abstract
Embodiments of the present application provide a state control method and device, which are beneficial to improve the cycle life of a battery and further improve the performance of the battery. The method is applied to an energy storage unit, the energy storage unit includes energy storage sub-modules, and the method includes: obtaining active power and reactive power of the energy storage unit; and in the case that the active power and the reactive power of the energy storage unit are both zero, locking an AC-DC conversion device in a target energy storage sub-module, the energy storage sub-modules including the target energy storage sub-module.
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