CN103762391A

Movatterモバイル変換

Info

Publication number: CN103762391A
Application number: CN201310747900.8A
Authority: CN
Inventors: 王金明
Original assignee: JIANGSU JIAYU NEW POWER TECHNOLOGY Co Ltd
Current assignee: JIANGSU JIAYU NEW POWER TECHNOLOGY Co Ltd
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2014-04-30

Abstract

The invention discloses a charge method of a lead-acid storage battery. Different charge voltage and current are controlled in six phases, wherein in the first phase of pre-charge, the battery is activated with low current; in the second phase of constant current, the battery is charged with high current; in the third phase of constant voltage, the voltage is maintained while the current is limited; in the fourth phase of trickle charge, low-current trickle charge is realized; the fifth phase realizes secondary constant-voltage charge; in the sixth phase of float charge, float charge with low current is realized. According to the method, a phase of secondary constant-voltage charge is added based on the existing five-stage comprehensive charge method, and the lead sulfide of the cathode of the lead-acid storage battery can be sufficiently decomposed in the phase, thus the lead-acid storage battery can be fully charged and is not damaged by the sulfation thereof due to insufficient charge; meanwhile, overcharge is avoided for sure, the service life of the battery is prolonged, and the charge time is shortened.

Description

A kind of charging method of lead acid accumulator

Technical field

The present invention relates to batteries of electric automobile, relate to particularly a kind of charging method of lead acid accumulator of new-energy automobile.

Background technology

In recent years, flourish along with new-energy automobile industry, the application of high-power lead acid accumulator in new-energy automobile also receives increasing concern, especially lead acid accumulator charging problem be subject to especially everybody attention.Lead acid accumulator, due to long-term undercharge or the rear not charging in time of electric discharge, vulcanizes thereby cause battery to produce, and therefore, the charging method of lead acid accumulator is the important topic of a research.

At present, conventional charging method has: constant current charge method, output voltage or change and the storage battery series resistance of adjustment charging device, keep the constant method of strength of charging current, but in the charging later stage, charging current is used for brine electrolysis, produce gas, make to give vent to anger and exaggerate; Constant voltage charge method, makes voltage all keeping constant numerical value in the charging interval, along with the rising gradually of accumulator voltage, electric current reduces gradually, but excessive at charging initial stage electric current, and the life of storage battery is made a big impact, and easily make accumulator plate bending, cause battery to scrap; Stage charging method, the charging method that adopts stage by stage constant current and constant voltage to combine, minimizes gas output, but uses as a kind of fast charge method, is subject to certain restrictions.

Feature in conjunction with constant current charge, constant voltage charge and stage charging is divided into 5 stages by charging process, is called the comprehensive mise-a-la-masse method of five-stage, as shown in Figure 1, and the first preliminary filling stage, little current activation battery; The second constant-current phase, large current charge; The 3rd constant-voltage phase, constant voltage and current limiting; The 4th trickle charge, little electric current tiny stream fills; The 5th floating charge, in the method, the vulcanized lead of lead-acid battery negative electrode can not get abundant decomposition, and battery charging is discontented with and generation sulfation.

Summary of the invention

Object of the present invention, is the charging method of the lead acid accumulator that a kind of six stages are provided, and to lead acid accumulator, is full of electric time and does not damage battery, extends the useful life of battery.

To achieve these goals, the technical solution adopted in the present invention is as follows:

A charging method for lead acid accumulator, the charging method of described lead-acid battery is divided into following six steps: first stage precharge, with the first predetermined current constant current precharge, until charge capacity reaches the first default power threshold; Second stage constant current charge, with the second predetermined current constant current charge, until charge capacity reaches the second default power threshold; Phase III constant voltage charge, the ceiling voltage reaching using second stage is as constant voltage charge, until charge capacity reaches the 3rd default power threshold; Fourth stage trickle charge, with the 4th predetermined current tiny stream charging, until charge capacity reaches the 4th default power threshold; Five-stage secondary constant voltage charge, the ceiling voltage reaching using fourth stage is as constant voltage charge, until charge capacity reaches the 5th default power threshold; The 6th stage floating charge, carries out constant voltage floating charge with float charge voltage, until the charging interval equals 3 hours.

Preferably, described first stage electric current is 0.02 ~ 0.025C.

Preferably, described second stage electric current is 0.15 ~ 0.25C.

Preferably, described phase III electric current is 0.03C.

Preferably, described fourth stage electric current is 0.02 ~ 0.025C.

Preferably, described five-stage electric current is 0.02 ~ 0.025C.

Adopt after such scheme, the charging method of a kind of lead acid accumulator of the present invention, in conjunction with the feature of constant current charge, constant voltage charge and stage charging, and increase the secondary constant voltage charge stage, in the time of within this stage, the vulcanized lead of lead acid storage battery pool cathode is fully decomposed, and makes lead acid accumulator can be full of electricity, can not cause damage because undercharge makes lead-acid battery sulfation, guarantee not overcharge simultaneously, extend the useful life of battery, shorten the charging interval.

Accompanying drawing explanation

Fig. 1 is the curve synoptic diagram of the comprehensive mise-a-la-masse method of five-stage in prior art.

Fig. 2 is the curve synoptic diagram of the whole charging process of a kind of lead acid accumulator of the present invention.

Wherein: longitudinal axis V representative voltage, transverse axis t represents the time, and S1, S2, S3, S4, S5, S6 are six charging interval sections, and V1, V2, V3, V4, V5 are the first ~ five voltage, and I1, I2, I3, I4, I5, I6 are the first ~ six electric current.

Embodiment

Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail.

Be illustrated in figure 2 the curve synoptic diagram of the whole charging process of a kind of lead acid accumulator of the present invention, whole charging process is divided into six stages: the first stage is pre-charging stage, when after storage battery access charger, by charger, detected the voltage of storage battery, now voltage is V1, with the first predetermined current I1(0.02-0.025C) carry out constant current precharge, the voltage of storage battery or batteries rises to V2 gradually from V1, when the charging interval reaches S1, enter next stage charging, and S1 is less than 4 hours.

Second stage is the constant current charge stage, with the second predetermined current I2(0.15-0.25C) carry out constant current charge, voltage rises to V3 gradually from V2, enter next stage charging, and S2 is less than 6.5 hours when the charging interval reaches S2.

Phase III is the modified constant-voltage charge stage, and the ceiling voltage V3 reaching using second stage is as constant voltage charge, and electric current drops to I3(0.03C gradually from I2), when the charging interval reaches S3, enter next stage charging, and S3 is less than 4.5 hours.

Fourth stage is the trickle charge stage, with the 4th predetermined current I4(0.02-0.025C) carry out trickle constant current charge, charging voltage rises to V4 gradually from V3, enter next stage charging, and S4 is less than 2 hours when the charging interval reaches S4.

Five-stage is the secondary constant voltage charge stage, and the ceiling voltage V4 reaching using fourth stage is as constant voltage charge, and electric current drops to I5(0.02-0.025C gradually from I4), when the charging interval reaches S5, enter next stage charging, and S5 is less than 1.5 hours; On prior art basis, increase the secondary constant voltage charge stage, the vulcanized lead of lead-acid battery can be decomposed fully within this stage.

The 6th stage was the floating charge stage, with float charge voltage V5, carried out constant voltage charge, and electric current reduces gradually, the grid corrosion of battery is in the slowest state, can extend the life of a cell, supplement the capacitance loss that self-discharge of battery causes simultaneously, suppress the sulfation that active material recrystallization causes; This stage charging binding hours S6 is less than 3 hours, and when entering this stage, the indicator light of charger is bright, shows that charge capacity reaches 100%, and this stage is full of after electricity substantially at storage battery, proceeds to little electric current and continues floating charge, is conducive to battery power abundance.

Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection range of the present invention.

Claims

1. a charging method for lead acid accumulator, is characterized in that: the charging method of described lead-acid battery is divided into following six steps:

First stage precharge, with the first predetermined current constant current precharge, until the charging interval reach the first Preset Time;

Second stage constant current charge, with the second predetermined current constant current charge, until the charging interval reach the second Preset Time;

Phase III constant voltage charge, the ceiling voltage reaching using second stage is as constant voltage charge, until the charging interval reaches the 3rd Preset Time;

Fourth stage trickle charge, with the 4th predetermined current tiny stream charging, until the charging interval reach the 4th Preset Time;

Five-stage secondary constant voltage charge, the ceiling voltage reaching using fourth stage is as constant voltage charge, until the charging interval reaches the 5th Preset Time;

The 6th stage floating charge, carries out constant voltage floating charge with float charge voltage, until the charging interval reaches the 6th Preset Time.

2. the charging method of a kind of lead acid accumulator as claimed in claim 1, is characterized in that: described first stage electric current is 0.02 ~ 0.025C.

3. the charging method of a kind of lead acid accumulator as claimed in claim 1, is characterized in that: described second stage electric current is 0.15 ~ 0.25C.

4. the charging method of a kind of lead acid accumulator as claimed in claim 1, is characterized in that: described phase III electric current is 0.03C.

5. the charging method of a kind of lead acid accumulator as claimed in claim 1, is characterized in that: described fourth stage electric current is 0.02 ~ 0.025C.

6. the charging method of a kind of lead acid accumulator as claimed in claim 1, is characterized in that: described five-stage electric current is 0.02 ~ 0.025C.