CN104979880A - Three-state overcharge protection method of multi-section-series-connection battery charging - Google Patents
Three-state overcharge protection method of multi-section-series-connection battery charging Download PDFInfo
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- CN104979880A CN104979880A CN201510433898.6A CN201510433898A CN104979880A CN 104979880 A CN104979880 A CN 104979880A CN 201510433898 A CN201510433898 A CN 201510433898A CN 104979880 A CN104979880 A CN 104979880A
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Abstract
The present invention provides a three-state overcharge protection method of multi-section-series-connection battery charging. The design function is realized through a microcomputer program. The concrete implementation logic is as follows: the charging is started after batteries are connected, the initial voltage and present current value are recorded, and timing is started whole storage is carried out; the voltage value and present current value of the batteries are sampled continuously, and a voltage fluctuation and a current fluctuation are selectively stored and replaced or recorded; the voltage fluctuation and current fluctuation frequencies and charging time are monitored and the charging is stopped when battery overcharge or overtime is judged; the battery voltage is monitored continuously, voltage full charge is judged after a period of time, and a charging process is restarted and the number of cycles is recorded; and when the number exceeds a limit, the charging process is completely stopped to enter a voltage floating charge mode. The overcharge phenomenon caused by imbalance of power capacity of each single battery in a battery group, the long time overcharge phenomenon caused by battery abnormality and the long time overcharge condition caused by a charger quality problem are detected in real time, and the charging is stopped forcibly to protect the batteries.
Description
Technical field
The present invention relates to over-charging of battery resist technology, refer to that tri-state that a kind of multi-section serial battery charges is let slip especially and fill guard method.
Background technology
The charge prepd of existing multi-section serial lead-acid battery, principle is all by after setting the output of light source of charger and being a fixed value, detected by the voltage and current charged to whole Battery pack and judge, after output current is reduced to the inner set point detected along with the increase of charging capacity, charger just judges that battery is full of, thus stops charging.
But in the lead-acid battery charge prepd of this existing multi-section serial, usually there is the unbalanced situation of each single battery electricity.The accurate monitoring function to overcharge conditions is lacked in charging process, whole Battery pack charging voltage do not meet impose a condition under, and when wherein overcharging appears in a joint or more piece, Charge Management cannot detect and stop charging in time, overcharge damage with what avoid this single-unit or multiple batteries, thus substantially reduce the useful life of whole Battery pack.
The product of prior art, detecting the fluctuation change of fluctuation change and the electric current that can't judge voltage in the process be full of, does not calculate the time of charging yet.If run into the situation that charging is abnormal, when a joint such as, in battery pack in 6 batteries or two joints damage, whole Battery pack cannot be elevated to the output voltage of charger, charging current also cannot be reduced to setting electric current simultaneously, that charger will charge always, cause remaining normal battery to overcharge, subsequently swelling fracture and damaging always.
Meanwhile, if some single battery is because quality problem causes voltage in charging process cannot rise to set point always in battery pack, will be charged, overlong time also can cause the damage of battery always.
In addition, if charger itself has occurred that quality problems or charge parameter have drifted about, cause cell voltage cannot reach the set point of charger always, long-time charging always can cause cell damage equally.
In addition, if user is because of improper use or employ the not corresponding charger of parameter by mistake, battery after filling, the output current of charger is not also reduced to the critical value of inner setting, that charger will continue charging, this process also can cause the battery be full of to occur seriously to overcharge phenomenon, and damages.
Summary of the invention
The tri-state that the present invention proposes the charging of a kind of multi-section serial battery is let slip and is filled guard method; can detect in real time because in battery pack the unbalanced or battery of each single-unit electricity abnormal cause overcharge phenomenon; and the long-time overcharge conditions to cause because of the quality problems of charger own, and stop charging by force thus protection battery.
Technical scheme of the present invention is achieved in that tri-state that a kind of multi-section serial battery charges is let slip and fills guard method, and realize its design function by microcomputer program, specific implementation logic is as follows:
A. start charging after battery access, first record the initial voltage of battery and current current value, and store two values, start timing simultaneously;
B. start charging, the magnitude of voltage of continuous sampling battery and present current value, and selectivity stores alternative or recording voltage fluctuates, current fluctuation;
C. monitoring voltage fluctuation and current fluctuation number of times and charging interval, judge over-charging of battery or time-out, stop charging;
D. stop charging after continue monitoring cell voltage, judge after a period of time voltage less than, restart charging process, and be recorded as cycle-index;
If the cycle-index that overcharges of E. step D monitoring exceedes restriction, then thoroughly stop charging process, proceed to low pressure floating charge pattern.
As preferably, in described step B, particular content is:
B1. charging is started, and the magnitude of voltage of continuous sampling battery and present current value, if after the certain number of times of continuous sampling, voltage has all exceeded the magnitude of voltage stored, and just substitutes storing value; If after the certain number of times of continuous sampling simultaneously, electric current, all lower than the current value stored, just substitutes storing value;
If B2. multiple repairing weld reduces to magnitude of voltage, be just designated as primary voltage fluctuation; If sample repeatedly current value to raise, be just designated as primary current fluctuation.
As preferably, in described step C, particular content is:
If C1. monitoring finds, occur exceeding the voltage fluctuation of program setting or the number of times of current fluctuation, then judge that battery has occurred overcharging phenomenon, program then stops charging immediately;
If C2. timing time exceedes set point (can program setting), even without reaching the current/voltage detected value be full of, also force to stop charging.
As preferably, in described step D, particular content is: still continue monitoring cell voltage after stopping charging, after waiting for a period of time, if cell voltage does not arrive full charge pressure value, although then judge that battery occurs overcharging phenomenon, overall electricity is not full of, and program then resets automatically charging process, repeat the monitor procedure of steps A-C process, and be recorded as and once overcharge recovery cycle-index.
As preferably, in described step e, particular content is: if step D monitoring overcharge cycle-index more than three times, then judge that this battery is no longer applicable to continuing charging, thoroughly stop charging process, charging control is proceeded to low pressure floating charge pattern, avoid battery repeatedly to overcharge.
As preferably, in described step C1, voltage fluctuation or current fluctuation number of times are 3-5 time, and in step C2, the time exceedes set point is 30-90 minute.
Compared with prior art, the invention has the advantages that: detect in real time because in battery pack each single-unit electricity unbalanced cause overcharge phenomenon, and stop charging by force thus protection battery; The long-time overcharge phenomenon that real-time detection causes because battery is abnormal, and stop charging by force thus protection battery; The long-time overcharge conditions that real-time detection causes because of the quality problems of charger own, and stop charging by force thus protection battery, be " tri-state compound over-charge protective "." tri-state compound over-charge protective " is by the monitoring logic of monitoring " voltage change curve, curent change curve and charging interval control " three kinds of state variation; achieve the over-charge protective function of multi-section serial lead-acid battery accurately and reliably; effectively and timely can find over-charging of battery phenomenon in any case; and stop charging in time; thus realize battery protection function, solve the present situation that on market, long-standing over-charging of battery damages.
Embodiment
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment: a kind of tri-state of multi-section serial battery charging is let slip and filled guard method; by long-term to external correlative theses and Learning Studies and experiment; grasp battery charging normal the voltage change curve different with during overcharge and curent change curve; and the synchronous variation relation of the normal voltage and current different when charging with battery under abnormal conditions; draw in abnormal cases; battery is when overcharging; there is the fluctuation up and down of non-rule in voltage and current curve, and fluctuation presents the experimental result of opposite trend.Have found Timeliness coverage battery pack because of single-unit or more piece, and even there are the effective ways that overcharge in whole Battery pack, and achieve design function by microcomputer program.
Specific implementation logic is as follows:
1. start charging after battery access, first record the initial voltage of battery and current current value, and store two values, start timing simultaneously.
2. start charging, and the magnitude of voltage of continuous sampling battery and present current value.If after the certain number of times of continuous sampling, voltage has all exceeded the magnitude of voltage stored, and just substitutes storing value; If after the certain number of times of continuous sampling simultaneously, electric current, all lower than the current value stored, just substitutes storing value.If initial voltage is 50V, initial current is 12A, and after the certain number of times of continuous sampling, magnitude of voltage is all about 60V, then choose median 60V and substitute 50V; Current value is 10A, then substitute 12A with 10A.
If 3. multiple repairing weld reduces to magnitude of voltage, be just designated as primary voltage fluctuation; If sample repeatedly current value to raise, be just designated as primary current fluctuation.If voltage storage is 60V, current storage is 10A, and multiple repairing weld is to magnitude of voltage lower than 60V afterwards, is just designated as primary voltage fluctuation; Sample repeatedly current value higher than 10A, be just designated as primary current fluctuation.
If 4. monitoring finds, occur repeatedly (number of times can program setting) voltage fluctuation or current fluctuation, then judge that battery has occurred overcharging phenomenon, program then stops charging immediately.Voltage fluctuation or current fluctuation number of times are 3-5 time.
If 5. timing time exceedes set point (can program setting), even without reaching the current/voltage detected value be full of, also force to stop charging.It is 30-90 minute that time exceedes set point.
6. still continue monitoring cell voltage after stopping charging, after waiting for a period of time, if cell voltage does not arrive full charge pressure value, although then judge that battery occurs overcharging phenomenon, but overall electricity is not full of, program then resets automatically charging process, repeats the monitor procedure of 1 ~ 5 process.And be recorded as and once overcharge recovery cycle-index.
If the 6th article monitoring overcharge cycle-index more than 3 times, then judge this battery be no longer applicable to continue charging, thoroughly stop charging process, charging control proceeded to low pressure floating charge pattern, avoid battery repeatedly to overcharge.
The method can detect in real time because battery pack in each single-unit electricity unbalanced cause overcharge phenomenon, and by force stop charging thus protection battery; The long-time overcharge phenomenon that real-time detection causes because battery is abnormal, and stop charging by force thus protection battery; The long-time overcharge conditions that real-time detection causes because of the quality problems of charger own, and stop charging by force thus protection battery." tri-state compound over-charge protective "; by the monitoring logic of monitoring " voltage change curve, curent change curve and charging interval control " three kinds of state variation; achieve the over-charge protective function of multi-section serial lead-acid battery accurately and reliably; effectively and timely can find over-charging of battery phenomenon in any case; and stop charging in time; thus realize battery protection function, solve the present situation that on market, long-standing over-charging of battery damages.
The result of charger to the charging experiment of the lead-acid battery group of the multiple capacity of plurality of specifications and market sale by Long-Time Service with the design's function is added up; the reliable and effective protective effect achieved battery of the present invention; greatly reduce the over-charging of battery damaged condition in various situation; extend the useful life of lead-acid battery greatly, and save a large amount of use cost for user.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the tri-state of multi-section serial battery charging is let slip and is filled a guard method, and it is characterized in that, realize its design function by microcomputer program, specific implementation logic is as follows:
A. start charging after battery access, first record the initial voltage of battery and current current value, and store two values, start timing simultaneously;
B. start charging, the magnitude of voltage of continuous sampling battery and present current value, and selectivity stores alternative or recording voltage fluctuates, current fluctuation;
C. monitoring voltage fluctuation and current fluctuation number of times and charging interval, judge over-charging of battery or time-out, stop charging;
D. stop charging after continue monitoring cell voltage, judge after a period of time voltage less than, restart charging process, and be recorded as cycle-index;
If the cycle-index that overcharges of E. step D monitoring exceedes restriction, then thoroughly stop charging process, proceed to low pressure floating charge pattern.
2. the tri-state of multi-section serial battery charging according to claim 1 is let slip and is filled guard method, and it is characterized in that, in described step B, particular content is:
B1. charging is started, and the magnitude of voltage of continuous sampling battery and present current value, if after the certain number of times of continuous sampling, voltage has all exceeded the magnitude of voltage stored, and just substitutes storing value; If after the certain number of times of continuous sampling simultaneously, electric current, all lower than the current value stored, just substitutes storing value;
If B2. multiple repairing weld reduces to magnitude of voltage, be just designated as primary voltage fluctuation; If sample repeatedly current value to raise, be just designated as primary current fluctuation.
3. the tri-state of multi-section serial battery charging according to claim 1 and 2 is let slip and is filled guard method, and it is characterized in that, in described step C, particular content is:
If C1. monitoring finds, occur exceeding the voltage fluctuation of program setting or the number of times of current fluctuation, then judge that battery has occurred overcharging phenomenon, program then stops charging immediately;
If C2. timing time exceedes set point (can program setting), even without reaching the current/voltage detected value be full of, also force to stop charging.
4. the tri-state of multi-section serial battery charging according to claim 1 is let slip and is filled guard method; it is characterized in that; in described step D, particular content is: still continue monitoring cell voltage after stopping charging; after waiting for a period of time, if cell voltage does not arrive full charge pressure value, although then judge that battery occurs overcharging phenomenon; but overall electricity is not full of; program then resets automatically charging process, repeats the monitor procedure of steps A-C process, and is recorded as and once overcharges recovery cycle-index.
5. the tri-state of multi-section serial battery charging according to claim 1 is let slip and is filled guard method; it is characterized in that; in described step e, particular content is: if step D monitoring overcharge cycle-index more than three times; then judge that this battery is no longer applicable to continuing charging; thorough stopping charging process; charging control is proceeded to low pressure floating charge pattern, avoid battery repeatedly to overcharge.
6. the tri-state of multi-section serial battery charging according to claim 3 is let slip and is filled guard method, and it is characterized in that: in described step C1, voltage fluctuation or current fluctuation number of times are 3-5 time, in step C2, the time exceedes set point is 30-90 minute.
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| CN108063465A (en) * | 2016-11-08 | 2018-05-22 | 磐石电池股份有限公司 | Charge and discharge balance control device and method |
| CN108196193A (en) * | 2017-12-22 | 2018-06-22 | 厦门拓宝科技有限公司 | A kind of method for safeguarding power matching network system worked well |
| CN108879857A (en) * | 2018-07-18 | 2018-11-23 | 北京航空航天大学 | A kind of universal lithium battery wireless charging system |
| CN110534827A (en) * | 2019-08-23 | 2019-12-03 | 江西优特汽车技术有限公司 | A kind of charging method of series-connected cell group |
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Application publication date: 20151014 |