Battery pack charging method, device and equipment

A charging method and battery pack technology, which are applied to battery circuit devices, circuit devices, and arrangement of multiple synchronous batteries, etc., can solve the problems of large battery systems, reduced battery charge and discharge capacity, and failure to reach the stop charging voltage, and achieve higher The effect of charging and discharging capacity

Inactive Publication Date: 2018-09-28
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] However, the inventors of the present application have found that for batteries, a larger charging current will lead to a larger line voltage drop and polarization voltage of the battery system, and a larger line voltage drop or polarization voltage will cause the collected The voltage of the battery cell is much higher than the actual voltage of the cell, which may easily lead to the fact that when the battery stops charging, the actual cell voltage does not reach the stop charging voltage, that is to say, the battery is not really fully charged, which reduces the charge and discharge capacity of the battery.

Method used

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  • Battery pack charging method, device and equipment
  • Battery pack charging method, device and equipment
  • Battery pack charging method, device and equipment

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Embodiment Construction

[0034] Features and exemplary embodiments of various aspects of embodiments of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention.

[0035] Embodiments of the present invention provide a battery pack charging method, device, and equipment, which are applicable to the technical field of battery pack charging and discharging, and can control the charging current of the battery at the end of charging to avoid excessive charging current of the battery pack at the end of charging, thereby It can avoid the line voltage drop or excessive polarization voltage caused by excessive charging current, so that the highest cell voltage collected when the battery pack stops charging is too high, and the actual cell voltage does not reach the stop charging voltage. In this way, the charging and discharging capacity of the battery pack...

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Abstract

The embodiment of the invention discloses battery pack charging method, device and equipment. The charging method comprises the steps of detecting highest single battery cell voltage of a battery pack; reducing a current limiting value of the battery pack and raising a current limiting voltage of the battery pack if the highest single battery cell voltage reaches an initial current limiting voltage; continuing to reduce the current limiting value of the battery pack and raise the current limiting voltage of the battery pack until a new reduced current limiting value reaches minimum current limiting value if the highest single battery cell voltage reaches the raised voltage of a charging limiting current, or stopping charging the battery pack until the raised current limiting voltage reaches a charging stop voltage. With the charging method disclosed by the technical scheme in the embodiment of the invention, the charging current at the last charging period can be controlled, and the charge-discharge capacity of the battery pack is improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method, device and equipment for charging a battery pack. Background technique [0002] With the gradual consumption of non-renewable energy such as petroleum, electric energy such as lithium-ion power batteries are very popular in the new energy market. Due to the relatively large battery capacity of large-scale energy storage systems such as lithium-ion power batteries, in order to shorten the charging and discharging time, now The charging strategy in the existing technology is: when charging, continue charging with a large current until the highest voltage of the monomer reaches the charging stop voltage and stop charging. [0003] However, the inventors of the present application have found that for batteries, a larger charging current will lead to a larger line voltage drop and polarization voltage of the battery system, and a larger line voltage drop or polarization vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0013
Inventor 鲍芳斌魏志立
Owner CONTEMPORARY AMPEREX TECH CO
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