CN201910644U - Charging management system of lithium ion power battery pack - Google Patents

Abstract

The utility model relates to a charging management system of lithium ion power battery packs, comprising a plurality of power battery packs, a main controller, a charger, a plurality of single battery side-branch circuits and a plurality of single battery voltage acquisition systems, wherein the power battery packs are connected by single batteries in series; the main controller can switch a constant-current charging mode and an equalizing charging mode; the charger is connected with the power battery packs in series, and a control end of the charger is connected with the main controller; the switching-on and switching-off of the single battery side-branch circuits are controlled by the main controller, and all the single battery side-branch circuits are respectively connected with positive electrodes and negative electrodes of single batteries; and the single battery voltage acquisition systems are used for acquiring the voltages of single batteries, and are respectively connected with the main controller. The charging management system has the advantages that the use is convenient, and the reliability is high; the single batteries can be furthest protected, so that the cyclic service lives of the battery packs are prolonged; the problems that the battery packs are overcharged and part of the single batteries are in power shortage state are avoided; and the voltage capacities of all the single batteries in the battery packs are equalized.

Description

Lithium-ion-power cell group charging management system

Technical field

The utility model relates to a kind of batteries charging management system, particularly a kind of lithium-ion-power cell group charging management system.

Background technology

Along with the rapid expansion of world population and to the rapid rising of resource consumption, oil is as the limited storage resource of non-renewable preciousness, consumed in a large number and wasted, oil has become the important restraining factors of human kind sustainable development, therefore, regenerative resource substitutes the new direction that petrochemical industry has become economic development.Along with the global environment pollution problem increasingly sharpens, human also more and more urgent to the demand of clean reproducible energy.Along with the rise of new forms of energy strategy, lithium ion power is applied to big capacity gradually, powerful application.

At present big capacity, powerful electrokinetic cell all is to carry out outside serial or parallel connection by some battery pack to constitute.And the principal element that influences lithium ion battery useful life and fail safe is: cell in the lithium-ion-power cell group, the capacity inequality appears easily, the not equal phenomenon of voltage, at traditional constant current charging mode, and under the constant voltage charge pattern, occur easily that cell overcharges and the part battery is in power shortage state, can influence the indexs such as life-span, safety and work operational efficiency of whole electric power battery pack greatly.

Summary of the invention

The purpose of this utility model is exactly the weak point in the background technology, and a kind of lithium-ion-power cell group charging management system is provided.

For achieving the above object, the utility model adopts following technical scheme lithium-ion-power cell group charging management system, comprising:

The power battery pack of some cell coupled in series;

One can switch the master controller of constant current charging mode and equalizing charge pattern;

One charger of connecting with power battery pack, its control end connects with master controller;

Some cell side shoot circuit of opening or closing by main controller controls, each cell side shoot circuit is in parallel with the cell positive and negative polarities respectively;

Some monomer battery voltage acquisition systems that are used to gather monomer battery voltage, each monomer battery voltage acquisition system connects with master controller respectively.

The utility model is compared with background technology, has one and is to use conveniently the reliability height; The 2nd, can protect cell to greatest extent, improve the life-span that recycles of battery pack; The 3rd, avoid battery pack overcharge and partial monosomy battery to be in power shortage state; The 4th, make each monomer battery voltage capacity equilibrium in the battery pack.

Description of drawings

Fig. 1 is the structural representation of lithium-ion-power cell group charging management system.

Embodiment

Embodiment 1: with reference to Fig. 1.Lithium-ion-power cell group charging management system, it comprises the power battery pack of the cell coupled in series of some capacity, the capacity of cell is for being 1Ah～10000Ah, its discharge voltage range is 1.0V～5.0V, just very cobalt acid lithium, LiMn2O4, LiFePO4, lithium nickel cobalt manganese oxygen or Li-Ni-Mn-O of each cell wherein, its negative pole is native graphite, Delanium, lithium titanate or alloy anode, and it also comprises:

One can switch the master controller of constant current charging mode and equalizing charge pattern;

One charger of connecting with power battery pack, its control end connects with master controller, and charger can be exported constant current, and the scope of output constant current is from 0.05A～10000Ah;

Some cell side shoot circuit of opening or closing by main controller controls, each cell side shoot circuit is in parallel with the cell positive and negative polarities respectively;

Some monomer battery voltage acquisition systems that are used to gather monomer battery voltage, each monomer battery voltage acquisition system connects with master controller respectively, and its acquisition precision is more than or equal to 0.01V.

Embodiment 2: with reference to Fig. 1.A kind of lithium-ion-power cell group charging management system, each cell is the 100Ah lithium-ion-power cell, LiFePO4 just very, negative pole is a graphite; For adapting to the electrocar user demand, adopt 150 cell series connection to constitute power battery pack, the power battery pack rated voltage is about 450V, and maximum operating currenbt 200A, maximum service rating are about 100Kw; The charger maximum charging voltage is 600V, and maximum charging current is 200A; Monomer battery voltage acquisition system precision is 0.01V; The maximum permission by electric current of cell side shoot circuit is 10A.

Constant current charging mode: when whole lithium-ion-power cell group, be in put electricity condition after; With the 100A electric current integral battery door group is charged, when the voltage of any one cell in the series battery surpasses 3.6V, after master controller receives signal, control charger automatically and stop charging process; After stopping through 30 seconds, transfer constant current charging mode to, each step constant current charge size of current is respectively 50A, 20A or 10A, regulates according to the actual requirements, selected 10A charging current, and after constant current charging mode finished, the acquiescence power battery pack was full electricity condition.

Permanent charge mode weighs: according to the self discharge gap and the actual operating position of cell, according to demand, at set intervals, integral battery door under full power state, is carried out the equalizing charge operation, equalizing charge constant current size is about 2～5A.When monomer battery voltage was higher than 3.7V, master control system was opened the cell side shoot circuit of this cell, carried out the electric current shunting of 2～5A, guaranteed that this cell is in the state of not being recharged; When this monomer battery voltage is higher than 3.8V, stops balanced constant current charge process, and carry out the fault prompting.Do not have under the prerequisite of fault in circuit control, the constant current equalizing charge time of control overall cell group, can finish this equalizing charge operation, the equalizing charge operation generally is no more than 10 hours.

What need understand is: though present embodiment is to the utility model detailed explanation of contrasting; but these explanations; just to simple declaration of the present utility model; rather than to restriction of the present utility model; any innovation and creation that do not exceed in the utility model connotation all fall in the protection range of the present utility model.

Claims (1)

1. lithium-ion-power cell group charging management system comprises it is characterized in that the power battery pack of some cell coupled in series also comprising:

One can switch the master controller of constant current charging mode and equalizing charge pattern;

One charger of connecting with power battery pack, its control end connects with master controller;

Some cell side shoot circuit of opening or closing by main controller controls, each cell side shoot circuit is in parallel with the cell positive and negative polarities respectively;

Some monomer battery voltage acquisition systems that are used to gather monomer battery voltage, each monomer battery voltage acquisition system connects with master controller respectively.

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