CN204129188U - A kind of screening system of lithium ion battery - Google Patents
A kind of screening system of lithium ion battery Download PDFInfo
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- CN204129188U CN204129188U CN201420455193.5U CN201420455193U CN204129188U CN 204129188 U CN204129188 U CN 204129188U CN 201420455193 U CN201420455193 U CN 201420455193U CN 204129188 U CN204129188 U CN 204129188U
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- lithium ion
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Abstract
The utility model is applicable to lithium ion battery characterization processes, disclose a kind of screening system of lithium ion battery, it adopts a kind of screening technique of lithium ion battery, this screening system comprises multiple lithium ion battery, charge-discharge test instrument, low-voltage charger, battery charging and discharging frame and battery series-parallel connection conversion equipment, described lithium ion battery is installed on battery charging and discharging frame, described lithium ion battery is connected with charge-discharge test instrument by battery series-parallel connection conversion equipment, and described low-voltage charger is connected with lithium ion battery.The screening technique of a kind of lithium ion battery that the utility model provides, process is simple, easy to operate, adopt comparative voltage whether equal or close to screening conditions, the impact of self discharge on screening process of lithium ion battery can be eliminated well, the consistance of lithium ion battery is improved, achieves the mobile equilibrium of battery system, thus be beneficial to the combination property and the market competitiveness that improve lithium ion battery or lithium-ion battery systems.
Description
[technical field]
The utility model relates to lithium ion battery characterization processes, particularly a kind of screening system of lithium ion battery.
[background technology]
Lithium-ions battery is as one of most popular green battery, high by means of its specific energy, the life-span is long, open-circuit voltage is high, self-discharge rate is low, the advantage such as environmentally friendly, cheap, becomes the Xin Li army of Battery Market.Along with lithium-ions battery is widely used at civil area (mobile phone, notebook, video camera, electronic toy), its security and practicality all obtain industry favorable comment.At present, lithium-ions battery towards high-power, high-energy-density, high cycle life direction develops rapidly, be that the electric automobile of power source will progressively replace part fuel-engined vehicle with lithium ion battery, large-scale lithium ion pile more enters in energy-accumulating power station, smart electric grid system as energy storage device.
The screening of lithium ion battery is significant for maintenance battery consistency, and particularly for large-scale power or energy storage battery system, after battery performance consistance deviation will circulate for a long time to electric battery, capacity and power play and impacts.The inconsistent of battery performance controls inconsistent by material in production run in factory or manufacturing condition, and battery attenuation state under different environment for use may inconsistently cause, be also therefore the important component part that electric battery and battery system are safeguarded to battery in the performance screening of different operational phase.
The screening of current lithium ion battery is mainly through screening the performance of battery in specific bad border, such as from battery capacity, internal resistance, voltage aspect, lithium-ion electric battery is tested, and composition one group close for performance parameter is ensured the consistance of electric battery and battery system.But even so still can not ensure the consistance of battery performance, one is, because battery capacity during test measures by the discharge current of predetermined value, change discharge current and just likely make battery capacity different again; Two are, the internal resistance of test is also an AC internal Resistance value, and the battery impedance of reality has a certain distance; Three are, the voltage of test is for judging self-discharge of battery size, for be full of electricity to time apart during assembling whether situation, do not consider during test, if cell voltage is consistent during assembling, but some lithium ion batteries time is apart three months, some lithium ion batteries time apart only has one month, and their self discharge is certainly different.Therefore, how the consistance of definite guarantee electric battery and battery system and stability, be the technical matters needing solution in industry badly.
[utility model content]
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of screening technique of lithium ion battery and use the screening system of the method, its screening technique being intended to solve lithium ion battery of the prior art can not test the technical matters of the less stable of the battery system after the actual performance of lithium ion battery, assembling effectively.
For achieving the above object, the utility model proposes a kind of screening system of lithium ion battery, comprise several lithium ion batteries, connection in series-parallel conversion equipment, measure loop, constant-current charge loop, constant-voltage charge loop and discharge loop, described lithium ion battery is all connected with connection in series-parallel conversion equipment, described connection in series-parallel conversion equipment is connected with discharge loop with constant-current charge loop, constant-voltage charge loop respectively, and described discharge loop is provided with the display device of the voltage showing each lithium ion battery;
Described connection in series-parallel conversion equipment comprises fixed mount, the some contact pins installed on fixed mount, slide block and the reed group in parallel installed on slide block and series connection reed group, described slide block is up and down relative to fixed mount, described contact pin is connected with reed group in parallel to coordinate or be connected with series connection reed group and coordinates, and the height of described reed group in parallel is different from the height of series connection reed group.
As preferably, longitudinal groove is offered in described fixed mount, described longitudinal groove left and right sides wall offers a socket hole respectively, described contact pin is laterally plugged in jack, the end of described contact pin remains on fixed mount wall outer surface, fixed mount inner space is stretched in front end, described slide block left and right sides wall offers several chutes corresponding, the front end of described contact pin embeds in corresponding chute, described series connection reed group is installed in the bottom in chute, and described reed group in parallel is installed in the top in chute.
As preferably, the battery charging and discharging detector that described measure loop, constant-voltage charge loop and discharge loop integrate, described constant-current charge loop comprises low-voltage charger, and described lithium ion battery is installed on battery charging and discharging frame.
As preferably, described lithium ion battery is connected with constant-current charge loop and discharge loop respectively by the series connection of connection in series-parallel conversion equipment.
As preferably, described lithium ion battery is connected with constant-voltage charge loop with measure loop respectively by the parallel connection of connection in series-parallel conversion equipment.
The beneficial effects of the utility model: compared with prior art, the screening system of a kind of lithium ion battery that the utility model provides, structure is simple, easy to operate, adopt comparative voltage whether equal or close to screening conditions, the impact of self discharge on screening process of lithium ion battery can be eliminated well, the consistance of lithium ion battery is improved, achieve the mobile equilibrium of battery system, thus be beneficial to the combination property and the market competitiveness that improve lithium ion battery or lithium-ion battery systems.
Feature of the present utility model and advantage will be described in detail by reference to the accompanying drawings by embodiment.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 be in the utility model embodiment serial parallel converter at the side view of series connection;
Fig. 3 is the cut-open view of A-A in Fig. 2;
Fig. 4 be in the utility model embodiment serial parallel converter at the side view of parallel connection;
Fig. 5 is the cut-open view of B-B in Fig. 4;
Fig. 6 is serial parallel converter series connection schematic diagram in working order in the utility model embodiment;
Fig. 7 is serial parallel converter principle of parallel figure in working order in the utility model embodiment.
[embodiment]
For making the purpose of this utility model, technical scheme and advantage clearly understand, below by accompanying drawing and embodiment, the utility model is further elaborated.But should be appreciated that, specific embodiment described herein, only in order to explain the utility model, is not limited to scope of the present utility model.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present utility model.
Consult Fig. 1, the utility model embodiment provides a kind of screening system of lithium ion battery 1, comprise several lithium ion batteries 1, connection in series-parallel conversion equipment 2, measure loop 3, constant-current charge loop 4, constant-voltage charge loop 5 and discharge loop 6, lithium ion battery 1 is all connected with connection in series-parallel conversion equipment 2, connection in series-parallel conversion equipment 2 is connected with discharge loop 6 with constant-current charge loop 4, constant-voltage charge loop 5 respectively, and discharge loop 6 is provided with the display device of the voltage showing each lithium ion battery 1.
Particularly, the battery charging and discharging detector 7 that measure loop 3, constant-voltage charge loop 5 and discharge loop 6 integrate, constant-current charge loop 4 comprises low-voltage charger 8, and lithium ion battery 1 is installed on battery charging and discharging frame.
In embodiment of the present utility model, measure loop 3 is applicable to the lithium ion battery 1 of assembling for tentatively selecting, to form mesuring battary group.In order to ensure that last screening can meet the demand of the producer, in mesuring battary group, the number of lithium ion battery 1 should be greater than the predetermined quantity of the producer.Wherein, testing conditions is under default working temperature, and namely 30 DEG C ~ 35 DEG C, whether the voltage of lithium ion battery 1 reaches preset voltage value in battery charging and discharging detector 7.
Consult Fig. 2 and Fig. 4, connection in series-parallel conversion equipment 2 comprises fixed mount 21, the some contact pins installed on fixed mount 21, slide block 22 and the reed group in parallel installed on slide block 22 and series connection reed group, slide block 22 is up and down relative to fixed mount 21, contact pin is connected with reed group in parallel to coordinate or be connected with series connection reed group and coordinates, and the height of reed group in parallel is different from the height of series connection reed group.
Referring again to Fig. 3 and Fig. 5, longitudinal groove 28 is offered in fixed mount 21, longitudinal groove 28 left and right sides wall offers a socket hole 27 respectively, contact pin is laterally plugged in jack 27, the end of contact pin remains on fixed mount 21 wall outer surface, fixed mount 21 inner space is stretched in front end, slide block 22 left and right sides wall offers several chutes 29 corresponding, the front end of contact pin embeds in corresponding chute 29.
In the connection in series-parallel conversion equipment 2 of the utility model embodiment, slide block 22 can be in upper and lower two positions relative to fixed mount 21, and these two positions correspond to series connection and parallel connection respectively.Lithium ion battery 1 is connected with discharge loop 6 with constant-current charge loop 4 respectively by the series connection of connection in series-parallel conversion equipment 2, parallel connection is connected with constant-voltage charge loop 5 with measure loop 3 respectively.
Based on above-mentioned design, series connection reed group is installed in the bottom in chute 29, when making slide block 22 slide into top, the respective pins of the left and right sides is connected, thus each lithium ion battery 1 is connected in series.Meanwhile, reed group in parallel is installed in the top in chute 29, when making slide block 22 slide into below, the respective pins of the left and right sides is connected, thus each lithium ion battery 1 is connected in parallel.
Consult Fig. 6, the both positive and negative polarity of each lithium ion battery 1 is connected with wire with the contact pin of connection in series-parallel conversion equipment 2, particularly: the positive pole of four lithium ion batteries 1 is connected with contact pin 11,12,13 and 14 respectively, and negative pole is connected with contact pin 15,16,17 and 18.When slide block 22 is pushed to series connection, contact pin 11 is connected with bulk loop by series connection reed 9, contact pin 12 is connected with contact pin 15 by series connection reed 23, contact pin 13 is connected with contact pin 16 by series connection reed 24, contact pin 14 is connected with contact pin 17 by series connection reed 25, and contact pin 18 is connected with bulk loop by series connection reed 26.Now, each lithium ion battery 1 is in the state of being connected in series, and positive pole and negative pole are in series connection output state.
Consult Fig. 7, when slide block 22 slides to parallel connection, contact pin 11,12,13,14 is interconnected with reed 31 in parallel, contact pin 15,16,17,18 is interconnected with the reed in parallel 32 of opposite side, now, positive pole and the negative pole of lithium ion battery 1 are interconnected respectively, form the loop of parallel connection.
The specific works process of embodiment of the present utility model is as follows:
(1) multiple lithium ion battery 1 is arranged on battery charging and discharging frame, and it is connected with connection in series-parallel conversion equipment 2.
(2) slide block 22 is slided, be adjusted to parallel connection, then connection in series-parallel conversion equipment 2 be connected with battery charging and discharging detector 7, filter out the lithium ion battery 1 meeting testing conditions, formed mesuring battary group, and incongruent lithium ion battery 1 is taken off from battery charging and discharging frame.
(3) on slide block 22 is sliding, be adjusted to series connection, be then connected with constant-current charge loop 4 by connection in series-parallel conversion equipment 2, now low-voltage charger 8 carries out first time charging, until charging current is less than 0.02C to electric battery to be measured.
(4) slided by slide block 22, be adjusted to parallel connection, then by connection in series-parallel conversion equipment 2 and battery charging and discharging detector 7, now battery charging and discharging detector 7 carries out second time charging, until charging current is less than 0.02C again to electric battery to be measured.
(5) connection in series-parallel conversion equipment 2 is adjusted to parallel connection, charged mesuring battary group is discharged, until discharge capacity is 90% of the battery capacity of lithium ion battery 1 independent in mesuring battary group, start the sparking voltage value V after recording the electric discharge of every block lithium ion battery 1
1.
(6) the standing magnitude of voltage V leaving standstill every block lithium ion battery 1 in rear mesuring battary group is measured
2, calculate the comparative voltage V of every block battery
3=| V
1-V
2|.
(7) by comparative voltage V
3equal or difference is less than ± and the lithium ion battery 1 of 0.01V ~ ± 0.03V picks out, and forms the electric battery that last consistance is splendid.
Whether embodiment of the present utility model adopts comparative voltage equal or close to screening conditions, the impact of self discharge on screening process of lithium ion battery 1 can be eliminated well, the consistance of lithium ion battery 1 is improved, achieves the mobile equilibrium that battery system is real.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace or improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. the screening system of a lithium ion battery, it is characterized in that: comprise several lithium ion batteries (1), connection in series-parallel conversion equipment (2), measure loop (3), constant-current charge loop (4), constant-voltage charge loop (5) and discharge loop (6), described lithium ion battery (1) is all connected with connection in series-parallel conversion equipment (2), described connection in series-parallel conversion equipment (2) respectively with constant-current charge loop (4), constant-voltage charge loop (5) is connected with discharge loop (6), described discharge loop (6) is provided with the display device of the voltage of each lithium ion battery of display (1),
Described connection in series-parallel conversion equipment (2) comprises fixed mount (21), the some contact pins installed on fixed mount (21), slide block (22) and install reed group in parallel on slide block (22) and series connection reed group, described slide block (22) is up and down relative to fixed mount (21), described contact pin is connected with reed group in parallel to coordinate or be connected with series connection reed group and coordinates, and the height of described reed group in parallel is different from the height of series connection reed group.
2. the screening system of a kind of lithium ion battery as claimed in claim 1, it is characterized in that: in described fixed mount (21), offer longitudinal groove (28), described longitudinal groove (28) left and right sides wall offers a socket hole (27) respectively, described contact pin is laterally plugged in jack (27), the end of described contact pin remains on fixed mount (21) wall outer surface, fixed mount (21) inner space is stretched in front end, described slide block (22) left and right sides wall offers corresponding several chutes (29), the front end of described contact pin embeds in corresponding chute (29), described series connection reed group is installed in the bottom in chute (29), described reed group in parallel is installed in the top in chute (29).
3. the screening system of a kind of lithium ion battery as claimed in claim 1 or 2, it is characterized in that: the battery charging and discharging detector (7) that described measure loop (3), constant-voltage charge loop (5) and discharge loop (6) integrate, described constant-current charge loop (4) comprises low-voltage charger (8), and described lithium ion battery (1) is installed on battery charging and discharging frame.
4. the screening system of a kind of lithium ion battery as claimed in claim 1 or 2, is characterized in that: described lithium ion battery (1) is connected with constant-current charge loop (4) and discharge loop (6) respectively by the series connection of connection in series-parallel conversion equipment (2).
5. the screening system of a kind of lithium ion battery as claimed in claim 1 or 2, is characterized in that: described lithium ion battery (1) is connected with constant-voltage charge loop (5) with measure loop (3) respectively by the parallel connection of connection in series-parallel conversion equipment (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420455193.5U CN204129188U (en) | 2014-08-12 | 2014-08-12 | A kind of screening system of lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420455193.5U CN204129188U (en) | 2014-08-12 | 2014-08-12 | A kind of screening system of lithium ion battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991197A (en) * | 2015-06-30 | 2015-10-21 | 桐乡市众胜能源科技有限公司 | Lithium iron phosphate lithium ion battery self-discharge test method |
| CN106025398A (en) * | 2016-06-14 | 2016-10-12 | 刘仲尧 | Battery pairing system and method |
-
2014
- 2014-08-12 CN CN201420455193.5U patent/CN204129188U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991197A (en) * | 2015-06-30 | 2015-10-21 | 桐乡市众胜能源科技有限公司 | Lithium iron phosphate lithium ion battery self-discharge test method |
| CN106025398A (en) * | 2016-06-14 | 2016-10-12 | 刘仲尧 | Battery pairing system and method |
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