Automatic charging and discharging equilibrium device for battery pack

An automatic equalization, charging and discharging technology, which is applied to battery circuit devices, circuit devices, electric vehicles, etc., can solve the problems that the equalization effect cannot be achieved, and the battery with remaining power exists at the same time, so as to achieve complete automation of the control process, maintain charging and discharging performance, The effect of improving consistency

Inactive Publication Date: 2014-03-19
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In most battery packs, multiple batteries with high and low remaining power often exist at the same time. At present, there are few dedicated equalization devices, and most of

Method used

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  • Automatic charging and discharging equilibrium device for battery pack
  • Automatic charging and discharging equilibrium device for battery pack
  • Automatic charging and discharging equilibrium device for battery pack

Examples

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Example Embodiment

[0016] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0017] Such as figure 1 As shown, the present invention includes a battery switching circuit 1, a charge and discharge current sensing and signal acquisition circuit 2, an equalizing charging circuit 3, an equalizing discharge circuit 4, and a control circuit 5. figure 1 The battery in is the working object of the device of the invention. The battery is connected to the battery switching circuit 1, the battery switching circuit 1 is connected to the charge and discharge current sensing and signal acquisition circuit 2, and the charge and discharge current sensing and signal acquisition circuit 2 are respectively connected to the equalizing charging circuit 3, the equalizing discharge circuit 4 and the control The circuit 5 is connected, and the equalizing charging circuit 3 and the equalizing discharging circuit 4 are connected to the control circuit 5 respecti...

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Abstract

Disclosed is an automatic charging and discharging equilibrium device for a battery pack. A battery switching circuit (1) is connected with a charging and discharging current sensing and signal acquiring circuit (2), a control circuit (5) is connected with the battery switching circuit (1), an equilibrium charging circuit (3) and an equilibrium discharging circuit (4) to control charging and discharging equilibrium parameters of the equilibrium charging circuit (3) and the equilibrium discharging circuit (4), the equilibrium charging circuit (3) and the equilibrium discharging circuit (4) are connected with a battery through the charging and discharging current sensing and signal acquiring circuit (2), the charging and discharging current sensing and signal acquiring circuit (2) is connected with the control circuit (5), and power switch devices of the equilibrium charging circuit (3) and the equilibrium discharging circuit (4) are serially connected with the battery. A voltage signal of a sampling resister (R1) of the charging and discharging current sensing and signal acquiring circuit (2) enters the control circuit (5) to analyze and calculate charging and discharging current, so that PID (proportion integration differentiation) closed-loop equilibrium charging or discharging is controlled.

Description

technical field [0001] The invention relates to a charging and discharging equalization device for a battery pack. technical background [0002] A battery pack is generally composed of multiple single cells connected in series and parallel. The performance of the whole battery pack not only depends on the performance of each single battery in the battery pack, but also depends on the consistency among all the single cells in the battery pack, including the maximum charge and discharge current, the highest energy storage limit, and the service life The main indicators such as safety and safety do not depend on the single battery with the best performance state, but on the single battery with the worst performance state. Therefore, the performance of the battery pack has a "barrel effect". The single battery with poor consistency is the "short board" of the battery pack and becomes the "bottleneck" of the performance of the battery pack. The more single cells that make up the...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 宫学庚张少昆舒恩
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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