Equalizing charge apparatus and equalizing charge method

A balanced charging and balancing technology, applied in the direction of circuit devices, battery circuit devices, secondary battery charging/discharging, etc., can solve problems such as poor performance, small effective capacity of battery packs, unbalanced charging of series battery packs, etc.

Inactive Publication Date: 2009-05-13
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of small effective capacity and poor performance of battery packs caused by unbalanced charging of series-connected battery packs, and provide a new, simple and effective equalized charging device and equalized charging method for series-connected battery packs

Method used

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  • Equalizing charge apparatus and equalizing charge method
  • Equalizing charge apparatus and equalizing charge method
  • Equalizing charge apparatus and equalizing charge method

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Embodiment Construction

[0010] The equalizing charging device and equalizing charging method for series-connected battery packs provided by the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0011] figure 1 Schematic diagram of the structure of the equalizing charging device for series battery packs provided by the present invention. like figure 1 As shown, the equalizing charging device for series-connected battery packs provided by the present invention includes a controller 4 and a plurality of charging branches, each charging branch is used to charge each single battery in the series-connected battery packs respectively, the described The controller 4 is used to collect the actual voltage value of each single battery, compare the actual voltage value with a given voltage value to determine the unbalanced single battery whose actual voltage value does not reach the given voltage value, and sequentially control the The charging branch ...

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Abstract

The invention provides an equalizing charging device, comprising a controller and a plurality of charging branch circuits, wherein, each charging branch circuit is used for respectively charging each single cell in a series battery; the controller is used for collecting the actual voltage magnitude of each single cell, the actual voltage value is compared with a given voltage magnitude to confirm imbalanced single cells, closure and disconnection of the charging branch circuit of each imbalanced single cell are controlled in sequence. An equalizing charging method comprises the following steps: carrying out voltage samplings of each single cell in the series battery to obtain the actual voltage magnitude of each single cell; comparing the actual voltage magnitude with the given voltage magnitude to confirm the imbalanced single cells; charging the imbalanced single cells in sequence and then stopping charging the imbalanced single cells. The equalizing charging device and the method provided in the invention solves the problem of imbalanced charging of the series battery, thus effectively improving the service performance of the battery.

Description

technical field [0001] The invention relates to a charging device, in particular to an equalizing charging device and an equalizing charging method for series battery packs. Background technique [0002] Rechargeable power batteries are widely used in various electronic products, especially electric vehicles, because of their better utilization. In an electric vehicle, a battery pack is provided as a power supply device in which a plurality of single cells are connected in series. Due to the limitations of the process conditions of the rechargeable power battery itself, there is a voltage difference between each single battery. After multiple charge and discharge cycles, the voltage difference between the single cells will become larger and larger, which will easily lead to unbalanced charging of the battery pack in series during the charging process, which will reduce the effective capacity of the battery pack in series and affect the battery pack. The use performance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/04H01M10/44
CPCY02E60/12
Inventor 邓林旺彭晓玲
Owner BYD CO LTD
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