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Intelligent cell equalization method, and intelligent cell

A technology of intelligent battery and equalization method, which is applied in battery circuit devices, secondary battery charging/discharging, secondary battery repair/maintenance, etc., can solve the problems of long passive equalization time and poor passive equalization effect, and improve passive equalization effect, the effect of reducing the time spent

Active Publication Date: 2016-01-06
GUANGZHOU XAIRCRAFT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the equalization current in passive equalization (that is, the release current used by the battery with a higher voltage to release the power) is at most about 100mA, and the charging current or discharge current is often dozens to hundreds of times the equalization current, the equalization current It is almost negligible, which leads to too long passive equalization time and poor passive equalization effect

Method used

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  • Intelligent cell equalization method, and intelligent cell
  • Intelligent cell equalization method, and intelligent cell
  • Intelligent cell equalization method, and intelligent cell

Examples

Experimental program
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Effect test

Embodiment 1

[0031] see figure 2 , the smart battery equalization method provided by the embodiment of the present invention is applied to a smart battery including multiple battery cells connected in series, and the smart battery equalization method includes:

[0032] Step 101, obtain the working status of the smart battery; wherein, the working status includes external working status and external non-working status, and obtaining the working status of the smart battery may be to actively obtain or detect the output status of the smart battery, or actively obtain or detect the smart battery The on-off state of the switch between the smart battery and the external circuit can also be that the smart battery actively provides its own output state, or the smart battery actively provides the on-off state of the switch between the smart battery and the external circuit, or it can directly detect the installed The working state of the electronic device of the smart battery, so as to indirectly ...

Embodiment 2

[0041] see Figure 4 , the above step 104 can also be refined into step 1041-step 1043, the specific content of step 1041-step 1043 is as follows:

[0042] Step 1041, obtain the balanced current of the target cell for discharging; specifically, when the target cell is discharged in the first balancing cycle, measure the balanced current of the target cell for discharging; or, the smart battery itself sets The balanced current for the battery cell to discharge is directly obtained from the stored data of the smart battery. It should be noted that the balanced current here refers to the magnitude of the balanced current.

[0043] Step 1042, according to the capacity difference between the cell capacity of the target cell and the minimum cell capacity, as well as the equalization current and the discharge time period, it is obtained that the capacity difference between the cell capacity of the target cell and the minimum cell capacity is less than or equal to The number N of eq...

Embodiment 3

[0048] see Figure 5 , when the number of target cells is greater than or equal to two, step 104 can also be refined into step 1044 in order to avoid the situation that the target cells of two adjacent programs in series discharge at the same time and interfere with each other, the specific content of step 1044 is as follows:

[0049] Step 1044, control two adjacent target cells to perform periodic discharge alternately until the capacity difference between the cell capacity of the target cell and the minimum cell capacity is less than or equal to a preset threshold; wherein, the battery in the smart battery The cells are connected in series. If the two adjacent cells are both target cells, and if the target cells of the two adjacent programs are discharged at the same time, the target cells of the two adjacent programs may affect each other. In order to eliminate this In the embodiment of the present invention, the adjacent two target cells are controlled to perform periodic ...

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PUM

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Abstract

The invention discloses an intelligent cell equalization method, and an intelligent cell, relating to the cell technical field, and aiming to solve the problems of long passive equalization time and poor passive equalization effect of an intelligent cell. The intelligent cell equalization method comprises: obtaining the operation state of an intelligent cell; when the intelligent cell is in an inoperative state, obtaining the electrical core capacity of each electrical core, and obtaining a smallest electrical core capacity, wherein the smallest electrical core capacity is the smallest among all electrical cores; and respectively calculating the capacity difference between the electrical core capacity of each electrical core and the smallest electrical core capacity, determining a target electrical core, wherein the capacity difference between the electrical core capacity of the target electrical core and the smallest electrical core capacity is greater than a preset threshold, and controlling the target electrical core to discharge periodically according to a preset equalization period until the capacity difference between the electric core capacity of the target electrical core and the smallest electrical core capacity is no greater than the preset threshold. The intelligent cell equalization method is used for the passive equalization of an intelligent cell.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for equalizing an intelligent battery and the intelligent battery. Background technique [0002] At present, with the rapid development of battery technology, lithium batteries are more and more used in the fields of automobiles and model airplanes. Due to the low voltage of a single lithium battery, multiple lithium batteries are often used in series in fields such as automobiles and model airplanes. The smart battery formed, each lithium battery is used as a cell in the smart battery, such as figure 1 As shown, the smart battery is composed of cell 1, cell 2 and cell 3 connected in series. The capacity of multiple cells of a smart battery is often not equal, and the capacity of the smart battery depends on the cell with the smallest capacity in the smart battery. In order to make the smart battery fully perform, it is necessary to take measures to make the smart bat...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/44
CPCY02E60/10
Inventor 罗云聪
Owner GUANGZHOU XAIRCRAFT TECH CO LTD