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Battery pack charging system and method

The technology of a charging system and charging method is applied in the direction of battery circuit device, battery parallel conversion, arrangement of multiple synchronous batteries, etc., and can solve problems such as difficulty in finding overcurrent devices, failure of battery packs to charge normally, large total charging current, etc.

Inactive Publication Date: 2017-09-15
CONTEMPORARY AMPEREX TECH CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when a battery pack with a larger capacity is fast charged, the normal total charging current is also very large. For example, the total charging current of a battery pack with a larger capacity for fast charging can reach 1000A, but it is difficult to find a charging battery that can meet 1000A. Over-current devices with high current capacity, so that the battery pack with a large charging current cannot be charged normally

Method used

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  • Battery pack charging system and method
  • Battery pack charging system and method
  • Battery pack charging system and method

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Embodiment Construction

[0015] Features and exemplary embodiments of various aspects of the 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 the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configurations and algorithms presented below, but covers any modification, substitution and improvement of elements, components and algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention.

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Abstract

The invention provides a battery pack charging system and method, and relates to the field of a power battery. The battery pack charging system comprises N charging branches sequentially arranged between the positive electrode and the negative electrode of a charging power supply; the first charging branch is connected with the positive electrode, and connected with the negative electrode through a first switching device; the rest charging branches, expect the first and the N charging branches, are all connected with the positive electrode through a second switching device, and the rest charging branches are all connected with the negative electrode through a third switching device; the N charging branch is connected with the negative electrode and connected with the positive electrode through a fourth switching device; the output end of the i charging branch is connected with the input end of the (i+1) charging branch through a fifth switching device; the battery set body in the charging branches is in a charging state; the first charging branch is connected with the positive electrode; the N charging branch is connected with the negative electrode; and the fifth switching device is closed, and all the switching devices, except the fifth switching device, are all switched off. By virtue of the battery pack charging system and method, it is ensured that the battery pack with relatively high charging current can be charged as normal.

Description

technical field [0001] The invention relates to the field of power batteries, in particular to a charging system and method for a battery pack. Background technique [0002] With the widespread use of new energy sources, battery packs are used as power sources in various fields. In order to increase the service life of the battery pack, the battery pack can generally be charged and discharged cyclically, so that it can be recycled. [0003] In order to shorten the charging time of the battery pack, fast charging technology came into being. In the process of fast charging, the charging current is very large. A battery pack with a large capacity is generally composed of multiple branches connected in parallel, and each branch needs to be charged. The total current of the battery pack charging circuit is the sum of the charging currents on multiple branches. That is to say, the total charging current of the charging circuit of the battery pack is also very large. In order ...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0013H02J7/0024
Inventor 蔡世明张凯
Owner CONTEMPORARY AMPEREX TECH CO
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