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Single-charged and series-discharged lithium battery pack

A technology of independent charging and series discharging. It is used in battery circuit devices, current collectors, electric vehicles, etc., to achieve the effect of long service life, full utilization, and high cell utilization.

Inactive Publication Date: 2015-04-08
CHANGZHOU INST OF ADVANCED MFG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a lithium battery pack that can be independently charged and discharged in series. The lithium battery pack can realize the independent charging of the battery cells, ensure that each battery cell can be fully charged, and the problem of overcharging is not easy to occur. When discharging, it adopts the working mode of series discharge, and can decide whether to output current according to the voltage of the cell itself, so as to ensure the full utilization of the power of each cell

Method used

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  • Single-charged and series-discharged lithium battery pack
  • Single-charged and series-discharged lithium battery pack
  • Single-charged and series-discharged lithium battery pack

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Embodiment 1

[0025] Such as figure 1 and figure 2 As shown, in this embodiment, a lithium battery pack independently charged and discharged in series can be mixed with multiple rechargeable cells with the same or different characteristics. The battery pack includes a charging power supply module 6 and several independent battery nodes 5; The charging power supply module 6 is electrically connected to the independent battery node 5 to provide a stable charging voltage; the charging positive terminal 8 and the charging negative terminal 9 of the independent battery node 5 are connected in parallel, and the discharging positive terminal 10 and the discharging negative terminal 11 are connected in series connection; the independent battery node 5 includes a charging cell 1, an independent charging module 4, a discharge control module 2, a charging protection circuit 12, and a discharge bypass circuit 3; the independent charging module 4 is electrically connected to the charging cell 1, To ch...

Embodiment 2

[0028] image 3 Shown is a schematic structural diagram of the second embodiment of the present invention. This embodiment is a lithium battery pack independently charged and discharged in series, including a charging power supply module 6 and several independent battery nodes 5, and also includes a voltage measurement module 13 and a current measurement module 17 , a total discharge switch 16, a microcontroller 14, the voltage measurement module 13 is connected to the independent battery node 5, and is used to amplify and filter the node output voltage of the independent battery node 5 and send it to the microcontroller 14; the current The measurement module 17 is used to measure the current signal of the independent battery node 5; the microcontroller 14 is connected with the main discharge switch 16 to control the on-off of the main discharge switch 16; the rest is the same as the first embodiment.

[0029] The node output voltage of each independent battery node 5 is ampli...

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Abstract

The invention discloses a single-charged and series-discharged lithium battery pack. The single-charged and series-discharged lithium battery pack comprises a charging power source module and at least one independent battery node. The charging power source module is electrically connected with the independent battery nodes and provides stable charging voltage for the independent battery nodes; the charging positive terminals and the charging negative terminals of the independent battery nodes are connected in parallel, and the discharging positive terminals and the discharging negative terminals of the independent battery nodes are connected in series. The single-charged and series-discharged lithium battery pack can ensure full charging of every battery cell and avoid the problem of overcharging during charging and determine whether to output current outwards during discharging according the voltage state of the battery cells, thereby ensuring full utilization of the power quantity of every battery cell. Besides, the single-charged and series-discharged lithium battery pack can achieve mixed application of chargeable battery cells with different characteristics and capacities and has the advantages of being high in utilization rate of the battery cells, long in service life and the like.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, in particular to a lithium battery pack independently charged and discharged in series. Background technique [0002] Lithium batteries have a wide range of applications, and lithium battery packs are used in a large amount in all walks of life in society. At present, lithium battery packs are mainly charged in series, and there is generally a problem of unbalanced charging during the charging process. Only some of the cells can be fully charged, and the rest of the cells are not fully charged, which directly affects the actual capacity of the battery pack; , due to the inconsistency of the cells, it will cause some cells to discharge light first, while other cells still have some power. However, when the battery management system detects that a cell is undervoltage, it will directly turn off the discharge switch and stop external charging. Discharge, the remaining power in the battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 赵汉宾孙楠王玉叶晓东于海武
Owner CHANGZHOU INST OF ADVANCED MFG TECH