Bus-based battery pack equalizer circuit and control circuit thereof

A technology of equalization circuit and control method, which is applied in the direction of battery circuit device, circuit device, secondary battery repair/maintenance, etc., can solve the problems of difficult control, complex structure, low efficiency, etc. Effect of reducing equalization time

Active Publication Date: 2014-07-23
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lossy equalization is an energy-dissipating method with a simple structure and has become increasingly mature, but its excess energy is all consumed on resistors, and its efficiency is low
Lossless equali

Method used

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  • Bus-based battery pack equalizer circuit and control circuit thereof
  • Bus-based battery pack equalizer circuit and control circuit thereof
  • Bus-based battery pack equalizer circuit and control circuit thereof

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Example Embodiment

[0081] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present invention, but should not be understood as limiting the present invention.

[0082] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, not It indicates or implies that the pointed d...

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Abstract

The invention discloses a bus-based battery pack equalizer circuit. The bus-based battery pack equalizer circuit comprises N batteries; each battery is connected with a corresponding equalizer circuit and the equalizer circuit is connected to a controller; each battery is connected with one equalizer circuit and each equalizer circuit is connected to one controller; the batteries correspond to the equalizer circuits one to one and the equalizer circuits correspond to the controllers one to one; the controllers are used for controlling the equalizer circuits according to the energy information of the battery pack, and thus realizing two-way flow of energy between the battery module and an energy transmission bus and realizing equalized energy storage of the batteries; the N controllers are connected in parallel to a data bus and the N batteries are connected in parallel to an energy transfer bus; N is greater than or equal to 2.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a bus-type battery equalization circuit and a control method thereof. Background technique [0002] The characteristics of high energy density, no memory effect, and long cycle period of a single cell make lithium-ion batteries have better portability, and are currently the most promising power batteries. These characteristics of lithium-ion batteries make them an ideal energy storage medium for electric (hybrid) vehicles, spacecraft and space stations, and renewable energy systems. However, due to the limitations of the manufacturing process, the lithium-ion battery voltage is only about 3.0V-4.2V. In order to form a high-voltage energy storage and supply device, multiple lithium-ion batteries must be connected in series to form a battery pack to work. For the lithium-ion battery cells that make up the lithium-ion battery pack, due to changes in capacity, internal resistance, ...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/42
CPCY02E60/10
Inventor 凌睿但强张婕舒志辉朱哲人刘楠王传鑫罗杨王理智
Owner CHONGQING UNIV
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