Power storage battery online capacity checking protection system and control method thereof

• Main Authors: GU TIANQI, WANG XIAOWEI, ZHANG LANLAN, SU LAN, WANG YU, LIN HANG, ZHANG HUALE, CHENG RUI, JIA QIANG, HOU ZHANBIN
• Format: Patent
• Language: Chinese; English
• Published: 21.12.2021
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING

The invention discloses a power storage battery online capacity checking protection system and a control method thereof. The system comprises a storage battery pack, a direct-current power supply, a controllable switch module, a pre-charging delay module and a protection control module, the storage battery pack is connected with the direct-current power supply in parallel through the controllable switch module and connected to a load module through the controllable switch module, the pre-charging delay module is connected between the positive electrode end of the storage battery pack and the positive electrode end of the direct-current power supply, and the protection control module is used for pre-charging the storage battery pack by controlling the pre-charging delay module after delaying for a first preset time when online capacity checking is completed; and after a second preset time is delayed, the pre-charging delay module is controlled to stop working, and the controllable switch module is controlled t