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Active equalizing and protecting system of stackable series-connected lithium battery

A technology of active balance and protection system, applied in electric vehicles, battery circuit devices, current collectors, etc., to achieve the effect of easy expansion of application

Inactive Publication Date: 2011-05-18
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are few reports on dynamic equalization and protection settings and technologies of stackable series lithium battery packs

Method used

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  • Active equalizing and protecting system of stackable series-connected lithium battery
  • Active equalizing and protecting system of stackable series-connected lithium battery
  • Active equalizing and protecting system of stackable series-connected lithium battery

Examples

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] Such as figure 1 As shown, it is a structural block diagram of the stackable series lithium battery active equalization and protection system provided by the present invention. The system includes a main control module and several expandable modules.

[0028] 1. Main control module:

[0029] The main control module includes a main processor, a co-processor, and a balance unit corresponding to the co-processor with up to 12 series-connected single batteries, including 12 switch units connected to 12 energy transfer units.

[0030] The main processor is an ordinary single-chip microcomputer, DSP processor, ARM processor and FPGA controller, etc., responsible for signal collection and arrangement, adjustment of equalization strategy, and sending measurement and control instructions to the coprocessor. The main processor communicates with the coprocesso...

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PUM

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Abstract

The invention relates to an active equalizing and protecting system of a stackable series-connected lithium battery. A coprocessor is connected with a processor by a serial peripheral interface (SPI) bus; each equalizing unit comprises a single battery and an equalizing circuit, wherein every adjacent two equalizing units are connected in series as follows: a first equalizing circuit and a first single battery are connected in parallel; the first equalizing circuit comprises a first P channel metal-oxide semiconductor field effect transistor (MOSFET) and a first N channel MOSFET; the drain electrodes of the two MOSFETs are connected, the gate electrodes of the two MOSFETs are connected, and the two MOSFETs are connected with the coprocessor through a first signal input end; the source electrodes of the first MOSFET and second MOSFET are respectively connected with the positive pole and negative pole of the first single battery in parallel; the positive pole of the second single battery is connected with the negative pole of the first single battery; a second equalizing circuit connected with the two ends of the second single battery in parallel has the same structure as the first equalizing circuit; and the drain electrodes of the first equalizing unit and the second equalizing unit are connected by a super capacitor.

Description

technical field [0001] The invention relates to a dynamic and active equalization and protection method for a lithium battery pack, in particular to a dynamic and active equalization technology and method for a lithium battery pack that can be stacked and flexibly configured. Background technique [0002] The application of lithium-ion batteries is becoming more and more extensive. In some applications, multiple single batteries are required to be connected in series or in parallel to meet the energy requirements of the system. Lithium-ion batteries have high requirements for charging and discharging. When overcharge, overdischarge, overcurrent and short circuit occur, the internal pressure and heat of lithium-ion batteries will increase greatly, which will easily generate sparks, burn and even explode. Therefore, lithium-ion batteries Group overcharge, discharge protection is necessary. In lithium-ion, the inconsistency of each single battery requires that necessary balanc...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 朱玉伟崔光磊韩鹏献姚建华刘志宏王海波齐安宁
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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