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Surplus lithium battery pack

A technology of accumulator pack and lithium battery, which is applied in the field of surplus lithium battery accumulator pack to achieve the effect of easy operation and simple method

Inactive Publication Date: 2011-11-30
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to meet the continuous use requirements of electric vehicles and facilitate the on-site solution to the problem of battery cell replacement, the present invention provides a surplus lithium battery battery pack in which at least one spare battery cell is backed up in the battery pack

Method used

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Examples

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Embodiment Construction

[0019] Below in conjunction with embodiment, the excess lithium battery accumulator pack of the present invention is described in detail.

[0020] figure 1 It is a schematic diagram of the internal connection of the excess lithium battery battery pack of the present invention.

[0021] The excess lithium battery storage battery pack of the present invention includes N in-use battery cell strings connected in series, point E is the negative output end, point B is the positive output end, and at least one battery cell is connected in series at point B at the positive end of the battery pack (N+1) As a backup battery cell, under normal use, the output of the battery pack is output from the positive terminal B point and the negative terminal E point of the N active battery cell strings in series. The backup battery cell is in a series state. There are several connection points of A, A1, A2...Ax respectively, and the positive terminal Ax of the last backup battery cell is in an op...

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PUM

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Abstract

A battery pack of excess lithium batteries, comprising a string of N in-use battery cells connected in series, at least one battery cell is connected in series at the positive end of the battery pack as a spare battery cell, in normal use, the output of the battery pack is The positive and negative terminals of the N in-use battery cell strings are output, and the positive electrode of the spare battery cell is in an open circuit state; the spare battery cell and the battery cell in use in the battery pack are of the same type, have the same voltage, and have the same charging voltage. The characteristics are the same; the backup battery cells are connected in parallel with battery cell protectors, and the number of battery cell protectors is the same as that of the backup battery cells; a battery manager is installed in the surplus lithium battery battery pack. The surplus lithium battery accumulator set of the present invention solves the problem of on-site replacement of battery cells. The method is simple and easy to operate, which can ensure that the electric vehicle can continue to drive and return to the factory by itself, and provides technical support for the promotion of electric vehicles.

Description

technical field [0001] The invention relates to a high-power lithium battery pack, in particular to a surplus lithium battery storage battery pack used in electric vehicles. Background technique [0002] At present, the rated voltage of the on-board lithium battery used in electric vehicles is only 2V-4V, the rated voltage of lithium manganate battery is 3.6V, and the rated voltage of lithium iron phosphate battery is only 2.3V. To meet the power voltage requirements of general electric vehicles, for example, a power system powered by DC311V needs hundreds of lithium battery cells connected in series to produce the same voltage index. The energy density of lithium batteries is very high, and it can store more than 130 (watt. hours) of electric energy per 1 kilogram. In addition, there are extremely flammable compounds in lithium batteries, which constitute the flammable and explosive characteristics of lithium batteries. To ensure the safe use of lithium batteries, it is ne...

Claims

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Application Information

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IPC IPC(8): H02J9/04H02J7/00H02H7/18
CPCY02B70/30Y04S20/20
Inventor 罗红旭毛永志蔡春华王瑞军吴宁宁王雅和
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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