Method and system for equalizing electric quantity of single batteries

A single battery and equalization system technology, which is applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problem of uneven performance of single batteries

Active Publication Date: 2012-07-04
BEIJING HYPERSTRONG TECH
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Problems solved by technology

[0005] The invention provides a method and system for balancing the power of a single battery, which are us

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  • Method and system for equalizing electric quantity of single batteries
  • Method and system for equalizing electric quantity of single batteries
  • Method and system for equalizing electric quantity of single batteries

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Embodiment Construction

[0019] Aiming at the inconsistency of the performance of the single cells in the battery pack that cannot be effectively solved in the prior art, the present invention provides a technical solution that can realize the power balance of the single cells in the battery pack.

[0020] figure 1 It is a schematic structural diagram of a single battery power balance system in an embodiment of the present invention, as figure 1 As shown, the single battery power balance system includes a signal acquisition module 11, a remaining power calculation module 12, a control module 13 and a bidirectional isolated DC conversion circuit 14, and also includes a matrix switch, which can be selected according to the control of the control module. Any single battery in the single battery pack is connected to a bidirectional isolated DC circuit; the signal acquisition module 11 is used to collect the performance parameter information of all single batteries in the battery pack; the remaining power ...

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Abstract

The invention provides a method and a system for equalizing the electric quantity of single batteries, wherein the system comprises a signal acquisition module, a remained electric quantity calculation module, a control module, a two-way isolation direct current conversion circuit and a switch matrix. The signal acquisition module is used for acquiring the performance parameter information of all single batteries in a battery pack; the remained electric quantity calculation module is used for acquiring the remained electric quantity of all single batteries in the battery pack; the control module is used for determining and controlling the switch matrix to select the single batteries required to be subjected to electric quantity equalization according to the remained electric quantity of all single batteries in the battery pack, and transmits the instruction of charging or discharging the selected single batteries required to be subjected to the electric quantity equalization to the direct current isolation transform circuit; and the two-way direct current isolation transform circuit is used for charging or discharging the selected single batteries required to be subjected to the electric quantity equalization according to the instruction transmitted by the control module. By the technical scheme provided by the invention, the problem of inconsistent performance among single batteries in the battery pack can be effectively solved.

Description

technical field [0001] The invention relates to battery management technology, in particular to a method and system for equalizing the power of a single battery, belonging to the technical field of lithium batteries. Background technique [0002] With the development of power lithium battery technology and pure electric vehicle technology, lithium batteries have replaced traditional lead-acid batteries and nickel-metal hydride batteries as the core energy storage devices in pure electric vehicles. Since the voltage of a single lithium battery is only 3-4 volts, the power supply system of an electric vehicle usually needs to connect a large number of lithium batteries in series. In some cases, these lithium batteries are divided into multiple battery modules to be connected in series. For lithium batteries, or other types of rechargeable batteries, the individual batteries may have inconsistencies in capacity and internal resistance due to factors such as the manufacturing pr...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 张剑辉舒鹏
Owner BEIJING HYPERSTRONG TECH
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