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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

AI Technical Summary

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 equalization is a non-energy dissipation method. This method uses circuits to transfer energy to achieve equalization. Its equalization efficiency is high, but its structure is complex and difficult to control.

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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Embodiment Construction

[0081] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0082] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or ...

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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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