CN103178566A - Uncharged state maintenance method and maintenance instrument of lithium battery pack unbalance - Google Patents
Uncharged state maintenance method and maintenance instrument of lithium battery pack unbalance Download PDFInfo
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- CN103178566A CN103178566A CN2011104398033A CN201110439803A CN103178566A CN 103178566 A CN103178566 A CN 103178566A CN 2011104398033 A CN2011104398033 A CN 2011104398033A CN 201110439803 A CN201110439803 A CN 201110439803A CN 103178566 A CN103178566 A CN 103178566A
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- lithium battery
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Abstract
The invention discloses an uncharged state maintenance method and a maintenance instrument of a lithium battery pack unbalance and belongs to the secondary battery field. The uncharged state maintenance method of the lithium battery pack unbalance includes utilizing an n string battery pack, connecting a single lithium battery protection board to every core, connecting in series a discharge resistor at a discharging port of every single lithium battery protection board, discharging every core of the lithium battery pack until discharging protection of every single lithium battery protection board stops and every core shows empty power, and dismounting the single lithium battery protection board and the discharge resistor on every core to subject all cores to be in a uniform emptying state, thereby achieving an uncharged state balance. The uncharged state maintenance method and the maintenance instrument of the lithium battery pack unbalance are applicable to the uncharged state balance maintenance of the lithium battery pack configured with a non-balance protection board and a passive protection board, and are simple, practical, high in generality, easy to expand, low in balance maintenance costs and easy to carry out and popularize.
Description
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Technical field
The present invention
Empty electric maintaining method and maintenance instrument that a kind of lithium battery group is unbalanceBelong to the secondary cell field, particularly relate to a kind of lithium ion battery group
The empty electric maintaining method that a kind of lithium battery group is unbalance
Background technology
now more and more lithium ion battery groups are applied to motor bicycle, battery-operated motor cycle, hay mover, vacuum cleaner, on the electric tools such as cleaner and equipment, restriction due to process conditions, even between each battery core of lithium ion battery group, process is selected, also always there is certain difference, through charge and discharge cycles repeatedly or after shelving for a long time, battery core is inner through dilation, also can change from power consumption, can produce larger voltage difference and capacity difference between battery core, existing protective circuit, equalizing circuit and charging modes, can not make emptying simultaneously between each battery core of battery pack, the battery pack disequilibrium, the capacity of battery pack can not be given full play to.
The baffle of lithium ion battery group has lack of balance baffle and balance protection plate, and the lack of balance baffle only shields, and there is no equalization function, and price is the most flat, but afunction is arranged; The balance protection plate divides again active equalization baffle and passive balance protection plate, and active equalization baffle cost is higher, uses less; Passive balance protection plate, cost is lower, and is slightly more expensive than lack of balance baffle, uses at most.
Application number is that 200910176661.9 Chinese patent application discloses the active equalization method under lithium ion battery group low discharging current state, the invention discloses a kind of lithium battery group active equalization method, this technology is based on boost technology and farad capacitor, and this technology can be used for the electric voltage equalization of jumbo serial lithium battery group when low discharging current.Active equalization method has the strong advantage of the ability of equalization, but circuit is complicated, and cost is high, the difficult popularization.
But the patent No. is the Chinese utility model patent of ZL200920263158.2 discloses a kind of battery maintenance combining structure, the battery maintenance port is set on packaging shell, the number of leads of battery maintenance port is the n+1 bar, n is the single battery number of battery combination, the lead-in wire of battery maintenance port is connected to the both positive and negative polarity of single battery, by detection port, can test the voltage of each cell, internal resistance.Can be connected with outside by the battery maintenance port, realize low current charge and discharge to single battery, single battery is detected, repair and safeguard.How not illustrate charging and discharging, do not introduce and how not control.
The lithium ion battery group is through sorting and the combo of Battery Plant, is equipped with lower-costly without balance protection plate and passive balance protection plate, and existing higher reliability is equipped with lower-costly without the balance protection plate, the ratio of serious unbalance occurs about one of percentage; Be equipped with lower-cost passive balance protection plate, the ratio of serious unbalance occur in the one thousandth left and right, we only need one thousandth is safeguarded to centesimal defective products, do not need every Battery pack to be equipped with more expensive active equalization baffle.Such as, motor bicycle use without approximately 60 yuan 1 of balance protection plate, approximately 90 yuan 1 of passive balance protection plate is matched passive balance protection plate 10000 Battery packs and is only needed 900000 yuan; Approximately 300 yuan 1 of the active equalization baffle of equal-wattage, 10000 Battery packs need 3000000 yuan, adopt the active equalization baffle expensive 2100000 yuan.
Crucial we need to find suitable maintaining method, quickly and easily for the user adjusts equilibrium, make battery pack performance maximum effect.
When the lithium battery group was unbalance, during the discharge of lithium battery group, the minimum battery core of carrying capacity can first arrive Cross prevention voltage, baffle cut-off discharge, and other battery cores that are not discharged can not continue discharge; The battery core charging state that is not discharged during charging is higher, can first arrive over-charge protective voltage, baffle cut-off charging, and battery core can not all be filled full.
Summary of the invention
The object of the invention is to avoid deficiency of the prior art, provide a kind of convenient and swift, adjust equilibrium, make the battery pack performance most powerful
The empty electric maintaining method that a kind of lithium battery group is unbalance.
The objective of the invention is to reach by following measures,
The empty electric maintaining method that a kind of lithium battery group is unbalance,The battery pack of employing to the n string; every economize on electricity core connects 1 single-unit baffle; at 1 discharge resistance of single-unit baffle discharge port series connection; with every economize on electricity core discharge; until each single-unit baffle discharge prevention stops, every economize on electricity core shows no electricity, sheds single-unit baffle and discharge resistance on every economize on electricity core; make all battery cores be in the state of consistent emptying, realize empty electrical equalization.
The Cross prevention voltage of single-unit baffle will adapt with the battery system of lithium cell core, and the overcurrent protection electric current of single-unit baffle is at 0.1 ~ 10A.The lithium of the main cobalt acid of the battery system of lithium cell core now-graphite system, LiMn2O4-graphite system, nickel manganese cobalt acid lithium-graphite system, their nominal voltage is 3.7V, and these a few class battery cores are generally used the baffle of over-charge protective voltage 4.2 ~ 4.5V, Cross prevention voltage 2.3 ~ 3.0V; Also have LiFePO4-graphite system, nominal voltage is 3.2V, and this class battery core is generally used the baffle of over-charge protective voltage 3.7 ~ 4.0V, Cross prevention voltage 2.0 ~ 2.5V.
The overcurrent protection electric current of single-unit baffle is at 0.1 ~ 50A.Select the overcurrent protection electric current larger, cost is higher; Select the overcurrent protection electric current less, may need the discharge time of overlength, time cost uprises.The overcurrent protection electric current of single-unit baffle is preferably at 0.2 ~ 5A, and this is the overcurrent protection current range of conventional single-unit baffle, is easy to obtain.
In the lithium battery group, the voltage of monomer battery core generally between 2 ~ 4.2V, selects discharge resistance at 0.1 ~ 100 Ω, can realize 0.02A ~ 42A current discharge.Resistance is less, and discharging current is larger; Resistance is larger, and discharging current is less, may need the discharge time of overlength, and cost uprises.Preferred discharge resistance can be realized 0.2A ~ 4.2A current discharge at 1 ~ 10 Ω, and this is the overcurrent value scope of common single-unit baffle, facilitates choice for use single-unit baffle.
The present invention is indicator light in parallel on discharge resistance, light on and off that can viewing lamp in operating process, and this battery core of the bright expression of lamp is not discharged, and discharge resistance is still in discharge, and lamp this battery core of expression of going out has discharged into the protection of single-unit baffle; N indicator light all goes out, and represents that whole battery cores are put into the protection of single-unit baffle, reach equalization discharge.Indicator light can be selected the miniature bulb of operating voltage 2 ~ 5V, also can select LED lamp string current-limiting resistance to realize.
The present invention is the shunt voltage table on discharge resistance, and voltmeter has voltage to represent that this battery core is not discharged, and discharge resistance is still in discharge, and voltmeter voltage is that 0 this battery core of expression has discharged into the protection of single-unit baffle; N voltmeter voltage is all 0, represents that whole battery cores are put into the protection of single-unit baffle, reach equalization discharge.
The present invention is indicator light in parallel on discharge resistance, shunt voltage table on discharge resistance.
The present invention all becomes 0 with voltmeter measuring and protecting plate p+, p-voltage, illustrates that whole battery cores are put into the protection of single-unit baffle, there is no Voltage-output, reaches equalization discharge.
The present invention is at discharge resistance series current table, and ammeter has electric current to represent this battery core still in discharge, and the ammeter electric current is 0, represents that this battery core has discharged into the protection of single-unit baffle; N ammeter electric current all becomes 0, illustrates that whole battery cores are put into the protection of single-unit baffle, do not have electric current to pass through, and reaches equalization discharge.
The present invention does not all generate heat with the temperature of thermometer measure discharge resistance, replys normal temperature, illustrates that whole battery cores are put into the protection of single-unit baffle, and discharge resistance no longer discharges, and reaches equalization discharge.
The empty electric maintenance instrument that a kind of lithium battery group is unbalance comprisesSingle-unit baffle and discharge resistance, parallel discharge resistance on the single-unit baffle, the single-unit baffle connects battery core.
The present invention is indicator light in parallel on discharge resistance, or on discharge resistance the shunt voltage table;
The present invention is at discharge resistance series current table.
The lithium battery group that the present invention is suitable for configuring lack of balance baffle and passive balance protection plate is done the sky electrical equalization and safeguarded, and is simple and practical, highly versatile, and easily expansion, the equalized maintenance cost is low, easily implements and promotes.
Description of drawings
AttachedFig. 1 is principle schematic of the present invention.
Embodiment
The present invention will be further described below in conjunction with embodiment.
In figure: Part A is battery assembly module.
BMS is batteries management system.
P+ is batteries management system cathode output end mouth.
P-is batteries management system cathode output end mouth.
B-is that the negative pole of the 1st battery core in battery pack is at the batteries management system Wiring port.
B1 ... Bn is in battery pack 1 ... the positive pole of n battery core is at the batteries management system Wiring port.
Part B is the equalization discharge unit.
PCM is single-unit battery core baffle.
P+ is baffle cathode output end mouth.
P-is baffle cathode output end mouth.
B+ is the Wiring port of positive pole on baffle of battery core.
B-is the Wiring port of negative pole on baffle of battery core.
R is discharge resistance.
L is indicator light.
Embodiment 1: one group of 10 lithium manganate battery group of going here and there that motor bicycle is used, be furnished with passive balance protection plate, nominal voltage 36V, rated capacity 9Ah, new car fill to satisfy and ride 38 kilometers, use after 1 year, and filling satisfies rides 26 kilometers, delivers to the maintenace point maintenance.
Doing the sky electrical equalization safeguards: the battery pack entrucking is ridden to Cross prevention.Battery pack to 10 strings; every economize on electricity core connects 1 single-unit baffle; use the single-unit baffle that adapts with the 3.7V system; over-charge protective voltage 4.25V, Cross prevention voltage 2.5V, overcurrent protection electric current 3A; press Fig. 1; every economize on electricity core connects the single-unit baffle, connects discharge resistance and the indicator light of upper 6 Ω; with the every economize on electricity core discharge of battery pack; until each single-unit baffle discharge prevention stops; every economize on electricity core shows no electricity; shed single-unit baffle and discharge resistance on every economize on electricity core, all battery cores are in the state of consistent emptying, realize empty electrical equalization.Indicator light in parallel on discharge resistance is discharged to the baffle protection, and indicator light all goes out, and realizes empty electrical equalization.
After doing the sky electrical equalization and safeguarding, fill fullly with charger, the mileage of riding reaches 34 kilometers, safeguards by empty electrical equalization, and the mileage of riding has promoted 8 kilometers.
Embodiment 2: one group of 12 ferric phosphate lithium cell group of going here and there that motor bicycle is used, be equipped with the baffle that there is no equalization function, nominal voltage 36V, rated capacity 10Ah, new car fill to satisfy and ride 46 kilometers, use after 1 year half, and filling satisfies rides 32 kilometers, delivers to the maintenace point maintenance.
Doing the sky electrical equalization safeguards: the battery pack entrucking is ridden to Cross prevention.Battery pack to 12 strings; every economize on electricity core connects 1 single-unit baffle; use the single-unit baffle that adapts with the 3.2V system, over-charge protective voltage 3.9V, Cross prevention voltage 2V, overcurrent protection electric current 3A press Fig. 1; every economize on electricity core connects discharge resistance and the indicator light of single-unit baffle, 6 Ω; be discharged to the baffle protection, every economize on electricity core shows no electricity, sheds single-unit baffle and discharge resistance on every economize on electricity core; make all battery cores be in the state of consistent emptying, realize empty electrical equalization.Indicator light in parallel on discharge resistance, indicator light all goes out, and realizes empty electrical equalization.
After doing the sky electrical equalization and safeguarding, fill fullly with charger, the mileage of riding reaches 44 kilometers, safeguards by empty electrical equalization, and the mileage of riding has promoted 12 kilometers.
The method of implementing is not limited to above-mentioned example, safeguards as long as use marrow of the present invention to carry out the sky electrical equalization, or the resistance serial or parallel connection is realized resistance control, or install unnecessary switch etc. additional on simple circuit, all belongs to protection scope of the present invention.
Claims (9)
1. empty electric maintaining method that the lithium battery group is unbalance; the battery pack of employing to the n string; every economize on electricity core connects 1 single-unit baffle; at 1 discharge resistance of discharge port series connection of single-unit baffle, with the every economize on electricity core discharge of battery pack, until each single-unit baffle discharge prevention stops; every economize on electricity core shows no electricity; shed single-unit baffle and discharge resistance on every economize on electricity core, make all battery cores be in the state of consistent emptying, realize empty electrical equalization.
2. the unbalance empty electric maintaining method of a kind of lithium battery group according to claim 1, is characterized in that indicator light in parallel on discharge resistance.
3. the unbalance empty electric maintaining method of a kind of lithium battery group according to claim 1, is characterized in that shunt voltage table on discharge resistance.
4. the unbalance empty electric maintaining method of a kind of lithium battery group according to claim 1, is characterized in that indicator light in parallel on discharge resistance, shunt voltage table on discharge resistance.
5. the unbalance empty electric maintaining method of a kind of lithium battery group according to claim 1, is characterized in that at discharge resistance series current table.
6. the unbalance empty electric maintaining method of a kind of lithium battery group according to claim 1, is characterized in that with voltmeter measuring and protecting plate discharge port voltage.
7. the unbalance empty electric maintaining method of a kind of lithium battery group according to claim 1, is characterized in that the temperature with the thermometer measure discharge resistance.
8. the empty electric maintenance instrument that the lithium battery group is unbalance, comprise the single-unit baffle, it is characterized in that the single-unit baffle connects battery core at 1 discharge resistance of single-unit baffle discharge port series connection.
9. the unbalance empty electric maintenance instrument of a kind of lithium battery group according to claim 8, it is characterized in that indicator light in parallel on discharge resistance or on discharge resistance shunt voltage table or at discharge resistance series current table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011104398033A CN103178566A (en) | 2011-12-26 | 2011-12-26 | Uncharged state maintenance method and maintenance instrument of lithium battery pack unbalance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104398033A CN103178566A (en) | 2011-12-26 | 2011-12-26 | Uncharged state maintenance method and maintenance instrument of lithium battery pack unbalance |
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| CN103178566A true CN103178566A (en) | 2013-06-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786863A (en) * | 2017-11-13 | 2019-05-21 | 屈海强 | A kind of lithium battery group balance of voltage repairs circuit and restorative procedure |
| CN111224185A (en) * | 2020-02-24 | 2020-06-02 | 深圳市电科电源股份有限公司 | Controllable self-repairing system and method for lithium battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427522A (en) * | 2001-12-18 | 2003-07-02 | 乐金电子(天津)电器有限公司 | Charger for wireless dust collector |
| WO2007050439A2 (en) * | 2005-10-21 | 2007-05-03 | Stryker Corporation | System and method for recharging a battery exposed to a harsh environment |
| CN202042919U (en) * | 2011-04-28 | 2011-11-16 | 常州格力博工具有限公司 | High-capacity lithium battery pack |
-
2011
- 2011-12-26 CN CN2011104398033A patent/CN103178566A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427522A (en) * | 2001-12-18 | 2003-07-02 | 乐金电子(天津)电器有限公司 | Charger for wireless dust collector |
| WO2007050439A2 (en) * | 2005-10-21 | 2007-05-03 | Stryker Corporation | System and method for recharging a battery exposed to a harsh environment |
| CN202042919U (en) * | 2011-04-28 | 2011-11-16 | 常州格力博工具有限公司 | High-capacity lithium battery pack |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786863A (en) * | 2017-11-13 | 2019-05-21 | 屈海强 | A kind of lithium battery group balance of voltage repairs circuit and restorative procedure |
| CN109786863B (en) * | 2017-11-13 | 2024-06-25 | 屈海强 | Repairing method of lithium battery pack voltage balance repairing circuit |
| CN111224185A (en) * | 2020-02-24 | 2020-06-02 | 深圳市电科电源股份有限公司 | Controllable self-repairing system and method for lithium battery |
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Application publication date: 20130626 |