Balancing method for battery cells in battery pack

A balancing method and battery pack technology, applied in the field of electric vehicles or energy storage systems, can solve problems such as fire risk, battery pack temperature rise, short circuit fire, etc., and achieve the effect of avoiding short circuit fire and reducing temperature rise.

Pending Publication Date: 2022-06-28
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the above methods, the first method requires each battery cell to lead out the balance line, which will bring the risk of short circuit and fire; the second method will also cause the temperature rise of the battery pack due to the placement of heating resistors in the battery pack, which may cause a risk of fire

Method used

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  • Balancing method for battery cells in battery pack
  • Balancing method for battery cells in battery pack

Examples

Experimental program
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Embodiment

[0028] In this embodiment, a method for balancing cells in a battery pack is provided. The system block diagram is as follows: figure 1 As shown, including: battery pack, cells, cell control board on each cell, package control board, and out-of-package equalizer.

[0029] In this solution, the most critical point is that a constant current device is arranged on each cell control board. The cell control board can communicate with the battery pack control board. The cell control board is provided with information collection devices such as cell voltage and temperature. The cell control board transmits the cell voltage, temperature and other information to the package through optical communication. control panel. The package control board transmits the equalization command to the cell control board, and the cell control board executes the equalization of the cells according to the command.

[0030] like figure 2 , the constant current device on the cell control board is compo...

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PUM

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Abstract

The invention provides a method for balancing battery cells in a battery pack, and belongs to the technical field of electric automobiles or energy storage systems. A galvanostat is arranged on each battery cell control panel; the battery cell control board is communicated with the battery pack control board, a battery cell information acquisition device is arranged on the battery cell control board, and the battery cell information is transmitted to the battery pack control board by the battery cell control board; and the battery pack control panel transmits a balancing command to the battery cell control panel according to the battery cell information, and the battery cell control panel executes balancing of the battery cells according to the command. The battery cell equalization can be realized without leading out an equalization line from each battery cell, and the risk of short-circuit fire is avoided; and the temperature rise of the battery pack is reduced.

Description

technical field [0001] The invention relates to the technical field of electric vehicles or energy storage systems, in particular to a method for balancing cells in a battery pack. Background technique [0002] Due to the difference in capacity of the cells in the battery pack, in the process of charging and discharging the battery pack, in order to improve the overall capacity of the battery pack, it is necessary to balance the charge / discharge of the cells in the pack. The existing equalization technology in the industry uses the two poles of each cell to pull out the wires to the control circuit board outside the battery pack to balance the discharge of one or several cells in the pack; there is also a control board installed for each cell. , and each control board uses a resistor as a discharge equalization device to perform discharge equalization on each cell. [0003] The first method in the above method requires each cell to lead out the equalization line, which will...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/42H01M10/44
CPCH02J7/0014H02J7/0019H02J7/0016H01M10/4207H01M10/4257H01M10/441H01M2010/4271
Inventor 赵伟初广前
Owner SHANDONG JIAOTONG UNIV
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