CN104215910A - Detection and diagnosis method for lithium ion battery pack - Google Patents
Detection and diagnosis method for lithium ion battery pack Download PDFInfo
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- CN104215910A CN104215910A CN201410397683.9A CN201410397683A CN104215910A CN 104215910 A CN104215910 A CN 104215910A CN 201410397683 A CN201410397683 A CN 201410397683A CN 104215910 A CN104215910 A CN 104215910A
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Abstract
The invention discloses a detection and diagnosis method for a lithium ion battery pack. By the detection and diagnosis method, whether the lithium ion battery pack is non-uniform in voltage or not by detecting cutoff current of a charger in the process of charging the lithium ion battery pack by a charger. The detection and diagnosis method for the lithium ion battery pack can simple and conveniently judge whether the lithium ion battery pack is non-uniform in voltage or not, and universality of the charger can be improved.
Description
Technical field
The present invention relates to technical field of lithium ion, relate to a kind of detection for Li-ion batteries piles and diagnostic method in particular.
Background technology
Application publication number CN 102185169 A, publication date are the charging method that the Chinese invention patent of 2011.9.14 discloses a kind of Li-ion batteries piles, in charging process, detect the voltage of each battery core of Li-ion batteries piles, when there being the voltage of battery core to reach setting voltage, the output current controlling charger is less than or equal to the euqalizing current of the equalizing circuit of internal battery pack, until complete charging when all the voltage of battery core all meets or exceeds balanced trigger voltage point; Described setting voltage is more than or equal to balanced trigger voltage, and is less than over-charge protective voltage.Each battery core in electric battery can be charged to full power state by the charging method of this invention, achieves making full use of of battery capacity, achieves equilibrium and the reliably protecting of maximum efficiency simultaneously, has positive reality meaning
Justice.
The charging modes of present Li-ion batteries piles has weak point; In charging process, adopt and the mode of voltage monitoring is carried out to judge whether Li-ion batteries piles occurs the situation that voltage is inconsistent to each accumulator in battery pack, and such mode needs special joint to connect, the news that work of going forward side by side, with high costs; Also not having versatility, can only be coordinate between specific charger and particular battery group, and specific charger can not charge to remaining battery pack on market; And in monitoring and deterministic process, operation easier is large, relatively professional personnel are needed to manipulate, and this and inapplicable vast non-professional user.
Summary of the invention
The object of the invention is for the deficiencies in the prior art part, a kind of detection for Li-ion batteries piles and diagnostic method are provided, it can judge whether Li-ion batteries piles occurs the situation that voltage is inconsistent simply and easily, can also improve the versatility of charger.
In order to solve the problems of the technologies described above, technical scheme of the present invention is as follows: for detection and the diagnostic method of Li-ion batteries piles, with charger in Li-ion batteries piles charging process, judge whether Li-ion batteries piles occurs the situation that voltage is inconsistent by the cut-off current detecting charger.
As preferably, the cut-off current of the charger detected and predetermined current are contrasted, when cut-off current is positioned at outside predetermined current scope, represent that the situation that voltage is inconsistent appears in Li-ion batteries piles.
As preferably, the cut-off current of described charger: when cut-off current be positioned at predetermined current scope outer time, be the charging current of charger during lithium ion battery protecting plate protection in Li-ion batteries piles; When cut-off current is positioned at predetermined current scope, it is the charging current of charger when lithium ion battery protecting plate in Li-ion batteries piles does not protect Li-ion batteries piles to charge normal complete.
As preferably, described cut-off current is positioned at outside predetermined current scope and refers to that described cut-off current is greater than the maximal value of predetermined current.
As preferably, when Li-ion batteries piles occurs that voltage is inconsistent, charger sends alerting signal.
The charging method of existing Li-ion batteries piles, complicated operation, with high costs, and versatility is not strong, applicant is after research repeatedly and experiment, abandon traditional mode that the voltage of each lithium ion battery in Li-ion batteries piles is monitored, applicant finds traditional in Li-ion batteries piles charging process, all adopt the mode of first constant current constant voltage again, complete until charge, giving Li-ion batteries piles in charging process, if all are normal, until Li-ion batteries piles charging is complete, this time, the fender of Li-ion batteries piles was not protected, but by charger charge complete after normal charging current, this charging current is relatively little, and when there is the inconsistent situation of lithium ion battery voltage, now the fender of Li-ion batteries piles is protected, the charging current that this time can detect, it not just normal charging current after charger charging, but fender protection time charger charging current, this charging current is larger than the charging current of charger after charging normal, so, applicant have employed the technical scheme of the application, electric current (i.e. cut-off current) after complete to charger charging, monitor, if within the scope of predetermined current, (predetermined current can be numerical value to the cut-off current detected, also can be scope, when predetermined current adopts concrete numerical value, described cut-off current refers to that cut-off current is less than or equal to predetermined current within predetermined current scope), then represent each lithium ion battery voltage consistent (for the technical program) in Li-ion batteries piles, if (predetermined current can be numerical value, also can be scope outside the scope preset, when predetermined current adopts concrete numerical value, described cut-off current refers to that cut-off current is greater than predetermined current outside predetermined current scope), then represent and occurred the situation (for the technical program) that voltage is inconsistent, need to repair, need this time to be divided into two kinds of modes, namely immediately repair or, use/place a period of time to repair again, repair immediately, can carry out manually or automatically, now the fender of Li-ion batteries piles is protected, can not charge, electric discharge repeatedly can only be carried out, charging, first discharge, try again to charge, and then discharge, try again to charge, so repeated multiple times, till can being charged into electricity, what adopt is small area analysis, step mode is charged, complete until charge, small area analysis, step mode not only can ensure charging effect, can also solve in charging process, the heating problem that Li-ion batteries piles produces, and if used or placed a period of time, this time can directly charge, first charge in a normal way, namely the mode of first constant current constant voltage again (also may appear at and not enter constant-voltage charge and just need to carry out small area analysis, step mode carries out the situation of charging), and then with small area analysis, step mode is charged.The charging method of the application, do not need to monitor the voltage of each lithium ion battery in Li-ion batteries piles, do not need to carry out communication between charger and the lithium ion battery of Li-ion batteries piles yet, just do not need to arrange special communication connector yet, greatly reduce cost, simplify the method for charging, the more important thing is, substantially increase the versatility of charger, do not need as in the past, certain Li-ion batteries piles produced must be equipped with the charger of this family, charger between different manufacturers seldom can be general, the more important thing is, adopt the method described in the application, do not need to carry out large change to existing charger, as long as the program of needs is directly inputted in the chip of existing charger, even if follow-up carry out for monitor mode, the upgrading of precision etc., in improvement, do not need to change Li-ion batteries piles yet, only need to upgrade accordingly to charger, such way, substantially increase the versatility of charger, extend its range of application, because how to filter the electric current monitored, process and how to set preset range etc., need to calculate, with repetition test and test, and how to calculate, then relate to the vital strategic secrets such as the collection of business data, also be enterprise competitiveness place, these confidential business be can not disclosed in, also can not disclose, adopt the mode that we are such, only need to upgrade to charger, do not relate to Li-ion batteries piles, the leakage of company information is not just related to yet.
As preferably, the cut-off current of the charger detected and predetermined current are contrasted, when cut-off current is positioned at predetermined current scope, represent that the situation that voltage is inconsistent appears in Li-ion batteries piles.
As preferably, the cut-off current of described charger: when cut-off current is positioned at predetermined current scope is the charging current of charger during lithium ion battery protecting plate protection in Li-ion batteries piles; When cut-off current be positioned at predetermined current scope outer and be less than predetermined current minimum value time, be the charging current of charger when lithium ion battery protecting plate in Li-ion batteries piles does not protect Li-ion batteries piles to charge normal complete.
As preferably, when Li-ion batteries piles occurs that voltage is inconsistent, charger sends alerting signal.
Beneficial effect of the present invention is:
Detection for Li-ion batteries piles of the present invention and diagnostic method, it can judge whether Li-ion batteries piles occurs the situation that voltage is inconsistent simply and easily, and can improve the versatility of charger.
Accompanying drawing explanation
Fig. 1 is detection and the diagnostic flow chart of one embodiment of the invention.
Embodiment
The following stated is only preferred embodiment of the present invention, not limits scope of the present invention.
Embodiment 1, see accompanying drawing 1, for detection and the diagnostic method of Li-ion batteries piles, with charger in Li-ion batteries piles charging process, judge whether Li-ion batteries piles occurs the situation that voltage is inconsistent by the cut-off current detecting charger, during use, charger is connected with Li-ion batteries piles, then charger is utilized to charge to Li-ion batteries piles, the mode of first constant current constant voltage is again adopted to charge, in charging process, detect the cut-off current of charger, then this cut-off current and predetermined current are contrasted, when cut-off current is less than predetermined current, predetermined current can be numerical value, also can be scope, charge normal to end, now there is not the phenomenon that voltage is inconsistent in Li-ion batteries piles, when cut-off current is greater than predetermined current maximal value time, represent that the situation that voltage is inconsistent appears in Li-ion batteries piles, and send alarm signal, alarm signal is pointed out user, the cut-off current of charger: when cut-off current is positioned at outside predetermined current scope is the charging current of charger during lithium ion battery protecting plate protection in Li-ion batteries piles, when cut-off current is positioned at predetermined current scope, it is the charging current of charger when lithium ion battery protecting plate in Li-ion batteries piles does not protect Li-ion batteries piles to charge normal complete.
While sending alarm signal, can repair Li-ion batteries piles manually or automatically.
Because this time, the fender of Li-ion batteries piles was protected, cannot charge to Li-ion batteries piles, so, need Li-ion batteries piles is discharged repeatedly, charge, till can charging to Li-ion batteries piles, then with small area analysis, step mode, Li-ion batteries piles is charged, until the voltage of each lithium ion battery is consistent in Li-ion batteries piles; Described small area analysis, gap charging modes refer to, charge to Li-ion batteries piles with the euqalizing current of the equalizing circuit being less than or equal to Li-ion batteries piles inside, and the 30-60 that often charges stops 10-20 second second, preferably, this electric current is between 50-100 milliampere, and often charge 40s, stops 20s.
In addition, when the situation that Li-ion batteries piles generation voltage is inconsistent, do not repair at once, but after usage or place after a period of time, repair again, specific as follows: when occurring that the inconsistent situation of voltage appears in Li-ion batteries piles, record Li-ion batteries piles total voltage now: U1, and sending alarm signal, alarm signal is pointed out user; After Li-ion batteries piles uses or places a period of time, the now total voltage of Li-ion batteries piles: U2; And U2 < U1;
First normal mode is adopted to charge to Li-ion batteries piles, until when Li-ion batteries piles total voltage is close to U1, the 0.2-0.3v lower than U1 of Li-ion batteries piles total voltage now, concrete determines according to actual conditions, the mode of charging normal can adopt the mode of constant voltage after first constant current, then, convert small area analysis to, step mode is charged to Li-ion batteries piles, until the voltage of each lithium ion battery is consistent in Li-ion batteries piles, described small area analysis, gap charging modes refers to, with the euqalizing current of the equalizing circuit being less than or equal to Li-ion batteries piles inside, Li-ion batteries piles is charged, and the 40-60 that often charges stops 10-20 second second.
Embodiment 2, for detection and the diagnostic method of Li-ion batteries piles, charger is connected with Li-ion batteries piles, then charger is utilized to charge to Li-ion batteries piles, the mode of first constant current constant voltage is again adopted to charge, in charging process, detect the cut-off current of charger, then this cut-off current and predetermined current are contrasted, the scope of the predetermined current that we are arranged, different with embodiment 1, its numerical value is relatively large, when cut-off current be positioned at predetermined current scope outer and be less than cut-off current minimum value time, charge normal to end, now there is not the phenomenon that voltage is inconsistent in Li-ion batteries piles, when cut-off current is positioned at predetermined current scope, represent that the situation that voltage is inconsistent appears in Li-ion batteries piles, now charger sends alerting signal, all the other are with embodiment 1.
More than illustrate it is only explanation of the invention, those of ordinary skill in the art's can completely is made to implement this programme, but be not restriction of the present invention, those skilled in the art can make to the present embodiment the amendment not having creative contribution as required after reading this instructions, and these are all not creative amendments.As long as but be all subject to the protection of Patent Law in right of the present invention.
Claims (8)
1. for detection and the diagnostic method of Li-ion batteries piles, it is characterized in that: with charger in Li-ion batteries piles charging process, judge whether Li-ion batteries piles occurs the situation that voltage is inconsistent by the cut-off current detecting charger.
2. the detection for Li-ion batteries piles according to claim 1 and diagnostic method, it is characterized in that: the cut-off current of the charger detected and predetermined current are contrasted, when cut-off current is positioned at outside predetermined current scope, represent that the situation that voltage is inconsistent appears in Li-ion batteries piles.
3. the detection for Li-ion batteries piles according to claim 2 and diagnostic method, it is characterized in that: the cut-off current of described charger: when cut-off current is positioned at outside predetermined current scope, is the charging current of charger during lithium ion battery protecting plate protection in Li-ion batteries piles; When cut-off current is positioned at predetermined current scope, it is the charging current of charger when lithium ion battery protecting plate in Li-ion batteries piles does not protect Li-ion batteries piles to charge normal complete.
4. the detection for Li-ion batteries piles according to claim 2 and diagnostic method, is characterized in that: described cut-off current is positioned at outside predetermined current scope and refers to that described cut-off current is greater than the maximal value of predetermined current.
5. the detection for Li-ion batteries piles according to claim 1 or 2 or 3 or 4 and diagnostic method, is characterized in that: when Li-ion batteries piles occurs that voltage is inconsistent, charger sends alerting signal.
6. the detection for Li-ion batteries piles according to claim 1 and diagnostic method, it is characterized in that: the cut-off current of the charger detected and predetermined current are contrasted, when cut-off current is positioned at predetermined current scope, represent that the situation that voltage is inconsistent appears in Li-ion batteries piles.
7. the detection for Li-ion batteries piles according to claim 6 and diagnostic method, it is characterized in that: the cut-off current of described charger: when cut-off current is positioned at predetermined current scope, is the charging current of charger when lithium ion battery protecting plate in Li-ion batteries piles is protected; When cut-off current be positioned at predetermined current scope outer and be less than predetermined current minimum value time, be the charging current of charger when lithium ion battery protecting plate in Li-ion batteries piles does not protect Li-ion batteries piles to charge normal complete.
8. the detection for Li-ion batteries piles according to claim 6 and diagnostic method, is characterized in that: when Li-ion batteries piles occurs that voltage is inconsistent, charger sends alerting signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410397683.9A CN104215910A (en) | 2014-08-13 | 2014-08-13 | Detection and diagnosis method for lithium ion battery pack |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112474438A (en) * | 2020-11-20 | 2021-03-12 | 珠海冠宇电池股份有限公司 | Battery grouping method |
| CN114339508A (en) * | 2020-09-29 | 2022-04-12 | 无锡中感微电子股份有限公司 | Wireless earphone and circuit thereof, charging box and circuit thereof, and charging box upgrading method |
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Application publication date: 20141217 |