CN205790266U - A kind of Li-ion batteries piles with charged in parallel discharged in series function - Google Patents
A kind of Li-ion batteries piles with charged in parallel discharged in series function Download PDFInfo
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- CN205790266U CN205790266U CN201620529246.2U CN201620529246U CN205790266U CN 205790266 U CN205790266 U CN 205790266U CN 201620529246 U CN201620529246 U CN 201620529246U CN 205790266 U CN205790266 U CN 205790266U
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- lithium ion
- ion battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
This utility model discloses a kind of Li-ion batteries piles with charged in parallel discharged in series function, including at least two lithium ion battery, two channel relay J1, diode D1, audion Q1, resistance R3, resistance R4, relay power VS and level control circuit；Two lithium ion batteries are designated as the first lithium ion battery B1 and the second lithium ion battery B2 respectively；During level control circuit output low level, audion Q1 is not turned on, and two channel relay J1 does not works, then the first lithium ion battery B1 and the second lithium ion battery B2 is connected in series；During level control circuit output high level, audion Q1 turns on, and two channel relay J1 works, then the first lithium ion battery B1 and the second lithium ion battery B2 is connected in parallel.
Description
Technical field
This utility model belongs to lithium battery PACK technical field, a kind of Li-ion batteries piles realizing charged in parallel, discharged in series, can be applicable to number, power new energy field.
Background technology
Lithium ion battery is due to the characteristic of its environmental protection and energy saving, have become as current most widely used power source, the Li-ion batteries piles that or connection in series-parallel in series or in parallel by multiple cells forms is due to its Large Copacity, the characteristic of high-multiplying power discharge, and being increasingly widely used as power provides energy source use to various fields.
At present, existing lithium ion battery charging technique usually includes many Battery packs (more than two), string many Battery packs both positive and negative polarity serial connection charge together.And the shortcoming of serial connection charge is: if difference occurs in one of which battery, time length, whole Li-ion batteries piles slowly also there will be voltage do not mate, the phenomenon such as unbalanced, after circulating battery N week (after a period of time circulation), it is necessary to set up equalizing circuit to realize microcosmic equilibrium.Wherein, microequilibrium is based on active-passive equilibrium in present stage, no matter is passive equilibrium or active equalization, battery pack power will be lost, and, the most unmatched two groups of battery cores series connection is charged together, cause overcharge, probability on fire is greatly increased, thus forms potential safety hazard.
For this, the utility model patent of one Application No. 200720157269.6, disclose the charge and discharge device of a kind of Li-ion batteries piles, this device includes at least two lithium ionic cell unit, discharge and recharge interface, charging plug, electric discharge plug, charging plug makes each lithium ionic cell unit in parallel, achieve the function that each lithium ionic cell unit is individually charged, electric discharge plug makes each lithium ionic cell unit connect, achieve the function of lithium ionic cell unit discharged in series, and discharged in series and charged in parallel switching are freely, improve the uniformity of Li-ion batteries piles, extend the service life of Li-ion batteries piles.Although this utility model achieves discharged in series and charged in parallel switching is free, but the program is by Mechanical course (by plug charging plug), and needs manual switching, troublesome poeration when using, and uses inconvenience, brings bad experience sense to user.
Utility model content
Therefore, for above-mentioned problem, the utility model proposes a kind of Li-ion batteries piles with charged in parallel discharged in series function, the circuit structure of existing Li-ion batteries piles is improved, makes lithium ion battery be connected in parallel, during electric discharge when charging, lithium ion battery is connected in series, and control, by low and high level, the connected mode that relay realizes automatically switching in parallel and serial, easy to use simple to operate, thus solve the deficiency of prior art.
In order to solve above-mentioned technical problem, this utility model be employed technical scheme comprise that, a kind of Li-ion batteries piles with charged in parallel discharged in series function, including at least two lithium ion battery, two channel relay J1, diode D1, audion Q1, resistance R3, resistance R4, relay power VS and level control circuit；Two lithium ion batteries are designated as the first lithium ion battery B1 and the second lithium ion battery B2 respectively, two channel relay J1 at least includes 8 pins, first pin of two channel relay J1 is connected to the positive pole of the first lithium ion battery B1, second pin is connected to the positive pole of the second lithium ion battery B2,3rd pin is connected to the negative pole of the first lithium ion battery B1,4th pin is connected to the negative pole end of diode D1, and the positive terminal of diode D1 is connected to one end (such as positive pole) of relay power VS；5th pin of two channel relay J1 is connected to positive pole and the colelctor electrode of audion Q1 of the second lithium ion battery B2,6th pin of two channel relay J1 is connected to the positive pole of the second lithium ion battery B2,7th pin is connected to the negative pole of the first lithium ion battery B1, and the 8th pin is connected to the negative pole of the second lithium ion battery B2；The grounded emitter of audion Q1, connects level control circuit after base series resistor R4 of audion Q1, resistance R3 is connected between emitter stage and the base stage of audion Q1；During level control circuit output low level, audion Q1 is not turned on, and two channel relay J1 does not works, then the first lithium ion battery B1 and the second lithium ion battery B2 is connected in series；During level control circuit output high level, audion Q1 turns on, and two channel relay J1 works, then the first lithium ion battery B1 and the second lithium ion battery B2 is connected in parallel.
In order to ensure stabilization of level and realize the connection in parallel and serial of two lithium ion batteries of automatic switchover, described level control circuit uses constant-current constant-voltage charging circuit realiration, this constant-current constant-voltage charging circuit includes charging adapter, resistance R1, resistance R2, diode D2 and charge management circuit, the input of charging adapter is connected to civil power, the minus earth of the outfan of charging adapter, positive pole is divided into two-way, being connected to charge management circuit after one road series diode D2, charge management circuit is connected to the positive pole of the second lithium ion battery B2；Another road connects one end of resistance R1, and the other end of resistance R1 connects one end and one end (away from that one end of audion Q1) of resistance R4, the other end ground connection of resistance R2 of resistance R2.
This utility model uses such scheme, when charging, charging adapter accesses civil power (its plug is inserted commercial power socket), then can realize charged in parallel, make often to organize battery core and be attained by nominal value, i.e. reach full state；When electric discharge, the plug of charging adapter is extracted, it is achieved discharged in series, make the nominal value that electricity is 2 times of whole set of cells, substantially increase total electricity；Meanwhile, solve and battery is added equalizing circuit and then the problem of the loss energy content of battery by prior art；To sum up, this utility model effectively raises the safety of set of cells, extends the service life of set of cells；Meanwhile, this utility model simple in construction, it is easy to accomplish and promote, there is good practicality.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams (charging adapter does not accesses civil power) of Li-ion batteries piles of the present utility model；
Fig. 2 is the circuit theory diagrams (charging adapter access civil power) of Li-ion batteries piles of the present utility model；
Fig. 3 is the first lithium ion battery B1 and the series connection schematic diagram of the second lithium ion battery B2 in embodiment；
Fig. 4 is the first lithium ion battery B1 and the schematic diagram in parallel of the second lithium ion battery B2 in embodiment.
Detailed description of the invention
In conjunction with the drawings and specific embodiments, this utility model is further illustrated.
For lithium battery group, prior art has the disadvantage that: after circulating battery N week, and battery slowly becomes unbalanced, and this is the most unsolved difficult problem of industry.No matter being to have added active equalization, or passively equalize, the energy content of battery all can be lost, and not necessarily get a desired effect, so the set of cells in present industry, being required for periodically doing " nursing ", namely single-unit mends electronic work.And long-term unbalanced set of cells, increasing single-unit battery core overcharges, and whole group overcharges, and causes danger.
Concrete, as a specific embodiment, see Fig. 1 and Fig. 2, the Li-ion batteries piles with charged in parallel discharged in series function of the present utility model, including at least two lithium ion battery, two channel relay J1, diode D1, audion Q1, resistance R3, resistance R4, relay power VS and level control circuit；Two lithium ion batteries are designated as the first lithium ion battery B1 and the second lithium ion battery B2 respectively, two channel relay J1 at least includes 8 pins, first pin of two channel relay J1 is connected to the positive pole of the first lithium ion battery B1, second pin is connected to the positive pole of the second lithium ion battery B2,3rd pin is connected to the negative pole of the first lithium ion battery B1,4th pin is connected to the negative pole end of diode D1, and the positive terminal of diode D1 is connected to one end (such as positive pole) of relay power VS；5th pin of two channel relay J1 is connected to positive pole and the colelctor electrode of audion Q1 of the second lithium ion battery B2,6th pin of two channel relay J1 is connected to the positive pole of the second lithium ion battery B2,7th pin is connected to the negative pole of the first lithium ion battery B1, and the 8th pin is connected to the negative pole of the second lithium ion battery B2；The grounded emitter of audion Q1, connects level control circuit after base series resistor R4 of audion Q1, resistance R3 is connected between emitter stage and the base stage of audion Q1.Diode D1, as rectifier cell, carries out rectification to the circuit of relay power VS, it is ensured that the stability of whole circuit.Certainly, it is possible to use the combination of other elements to realize rectification purpose.
In order to ensure stabilization of level and realize the connection in parallel and serial of two lithium ion batteries of automatic switchover, in the present embodiment, level control circuit uses constant-current constant-voltage charging circuit realiration, this constant-current constant-voltage charging circuit includes charging adapter, resistance R1, resistance R2, diode D2 and charge management circuit, the input of charging adapter is connected to civil power, the minus earth of the outfan of charging adapter, positive pole is divided into two-way, being connected to charge management circuit after one road series diode D2, charge management circuit is connected to the positive pole of the second lithium ion battery B2；Another road connects one end of resistance R1, and the other end of resistance R1 connects one end and one end (away from that one end of audion Q1) of resistance R4, the other end ground connection of resistance R2 of resistance R2.Charge management circuit can use existing charging management chip to realize, and I will not elaborate.
In the present embodiment, charging adapter therein uses 4.2V adapter to realize, naturally it is also possible to use other adapters to realize, and it can access civil power and realize energising, it is also possible to accesses other power supplys and is energized.
This utility model realizes charged in parallel discharged in series function by such scheme, namely each lithium ion battery is in parallel when charging, is connected in series when electric discharge, such as two Battery packs and when getting up voltage be nominal 3.7V, when being together in series, voltage is 7.4V nominal.
In the present embodiment, two channel relay J1 is the element of 8 pins, controls two groups of lithium ion batteries (the first lithium ion battery B1 and the second lithium ion battery B2) parallel-serial conversion respectively.As shown in Figure 3, during constant-current constant-voltage charging circuit output low level, audion Q1 is not turned on, two channel relay J1 does not works, then the first lithium ion battery B1 and the second lithium ion battery B2 is connected in series, namely B1-and B2+ communicates, and the most whole set of cells realizes series connection, the nominal value of voltage V1=2 times between i.e. P+ and P-, such as 3.7 × 2=7.4V.As shown in Figure 4, during constant-current constant-voltage charging circuit output high level, audion Q1 turns on, two channel relay J1 works, then the first lithium ion battery B1 and the second lithium ion battery B2 is connected in parallel, say, that, B1+ and B2+ communicates, B1-and B2-communicates, the voltage V1 between the most whole set of cells P+, P-=nominal value, such as 3.7V.
It addition, in such scheme, lithium ion battery can arrange multiple, simultaneously the number of the pin of corresponding relay also to increase (or set up organize switch) more, it is ensured that during charging, multiple lithium ion batteries are connected in parallel, during electric discharge, multiple lithium ion batteries are connected in series.
Utilize scheme of the present utility model, the Li-ion batteries piles of the most alternative original 8.4V of Li-ion batteries piles of a 4.2V, thus it is greatly saved energy.Meanwhile, when charging, two lithium ion battery charged in parallels, make often to organize battery core and be attained by the full state of 4.2V, solve battery and add the equalizing circuit loss energy content of battery, be effectively increased the safety of set of cells, and extend set of cells service life.
This utility model uses such scheme, effective management battery charging, considerably increases set of cells service life so that it is become safer reliably.It addition, overall circuit stability of the present utility model is high, substantial amounts of it is demonstrated experimentally that Li-ion batteries piles of the present utility model is reliable and stable, safer.
Although specifically showing in conjunction with preferred embodiment and describing this utility model; but those skilled in the art should be understood that; in the spirit and scope of the present utility model limited without departing from appended claims; this utility model can be made a variety of changes in the form and details, be protection domain of the present utility model.
Claims (2)
1. a Li-ion batteries piles with charged in parallel discharged in series function, it is characterised in that: include at least two lithium ion battery, two channel relay J1, diode D1, audion Q1, resistance R3, resistance R4, relay power VS and level control circuit；Two lithium ion batteries are designated as the first lithium ion battery B1 and the second lithium ion battery B2 respectively, two channel relay J1 at least includes 8 pins, first pin of two channel relay J1 is connected to the positive pole of the first lithium ion battery B1, second pin is connected to the positive pole of the second lithium ion battery B2,3rd pin is connected to the negative pole of the first lithium ion battery B1,4th pin is connected to the negative pole end of diode D1, and the positive terminal of diode D1 is connected to one end of relay power VS；5th pin of two channel relay J1 is connected to positive pole and the colelctor electrode of audion Q1 of the second lithium ion battery B2,6th pin of two channel relay J1 is connected to the positive pole of the second lithium ion battery B2,7th pin is connected to the negative pole of the first lithium ion battery B1, and the 8th pin is connected to the negative pole of the second lithium ion battery B2；The grounded emitter of audion Q1, connects level control circuit after base series resistor R4 of audion Q1, resistance R3 is connected between emitter stage and the base stage of audion Q1；During level control circuit output low level, audion Q1 is not turned on, and two channel relay J1 does not works, then the first lithium ion battery B1 and the second lithium ion battery B2 is connected in series；During level control circuit output high level, audion Q1 turns on, and two channel relay J1 works, then the first lithium ion battery B1 and the second lithium ion battery B2 is connected in parallel.
Li-ion batteries piles the most according to claim 1, it is characterized in that: described level control circuit uses constant-current constant-voltage charging circuit realiration, this constant-current constant-voltage charging circuit includes charging adapter, resistance R1, resistance R2, diode D2 and charge management circuit, the input of charging adapter is connected to civil power, the minus earth of the outfan of charging adapter, positive pole is divided into two-way, being connected to charge management circuit after one road series diode D2, charge management circuit is connected to the positive pole of the second lithium ion battery B2；Another road connects one end of resistance R1, and the other end of resistance R1 connects one end and one end of resistance R4, the other end ground connection of resistance R2 of resistance R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620529246.2U CN205790266U (en) | 2016-06-03 | 2016-06-03 | A kind of Li-ion batteries piles with charged in parallel discharged in series function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620529246.2U CN205790266U (en) | 2016-06-03 | 2016-06-03 | A kind of Li-ion batteries piles with charged in parallel discharged in series function |
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| CN205790266U true CN205790266U (en) | 2016-12-07 |
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| CN201620529246.2U Expired - Fee Related CN205790266U (en) | 2016-06-03 | 2016-06-03 | A kind of Li-ion batteries piles with charged in parallel discharged in series function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958144A (en) * | 2016-06-03 | 2016-09-21 | 深圳市诚卓能源科技有限公司 | Lithium-ion battery pack with parallel charging and series discharging functions |
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2016
- 2016-06-03 CN CN201620529246.2U patent/CN205790266U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958144A (en) * | 2016-06-03 | 2016-09-21 | 深圳市诚卓能源科技有限公司 | Lithium-ion battery pack with parallel charging and series discharging functions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20200603 |