CN102315673A - Device for ensuring stable charging and discharging of sodium-sulfur battery pack - Google Patents
Device for ensuring stable charging and discharging of sodium-sulfur battery pack Download PDFInfo
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- CN102315673A CN102315673A CN201110259718A CN201110259718A CN102315673A CN 102315673 A CN102315673 A CN 102315673A CN 201110259718 A CN201110259718 A CN 201110259718A CN 201110259718 A CN201110259718 A CN 201110259718A CN 102315673 A CN102315673 A CN 102315673A
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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
The invention provides a device for ensuring the stable charging and discharging of a sodium-sulfur battery pack, which at least comprises the sodium-sulfur battery pack and at least one at least one configuration module, wherein the sodium-sulfur battery pack comprises a plurality of single batteries; each configuration module in at least one configuration module comprises a plurality of diode units; and the configuration modules are connected in parallel to two ends of each single battery in the plurality of single batteries so as to limit the voltage of the single battery in the charging and discharging processes. The device for ensuring the stable charging and discharging of the sodium-sulfur battery pack has the advantages of simpler structure, stable and reliable performance and high cost performance.
Description
Technical field
The invention belongs to the chemical cell field, relate in particular to a kind of stable device that discharges and recharges of sodium-sulphur battery group of guaranteeing.
Background technology
Sodium-sulphur battery (Sodium Sulfur battery is called for short NAS) is made electrolyte with the beta-aluminium oxide ceramics of sodium ion good conductivity, and sodium metal is made negative material, and nonmetal sulphur is made positive electrode.During battery charging and discharging, add electric energy during charging and be converted into chemical energy (with Na, stores S) is got up, and sodium during discharge, sulphur form sodium polysulfide through electrochemical reaction and chemical energy is converted into electric energy discharges.Monomer sodium-sulphur battery theoretical capacity can reach more than the 700Ah/Kg, has 100% energy conversion efficiency, high current density discharge, and the life-span is long, advantages such as no self discharge and abundant raw material.A main application of sodium-sulphur battery is to store as electric power.The initial electric power that obtains owing to the cell reaction through such a sodium-sulphur battery is approximately 2V, and monocell can't satisfy the voltage of actual use.Therefore; Need some monomer sodium-sulphur batteries be carried out the connection in series-parallel combination according to design capacity and power; The incubator that designs of packing into forms module, further through battery management system module is integrated into multikilowatt or MW class energy-accumulating power station, and being incorporated into the power networks then provides practical application.
The NAS battery is in charge and discharge process, and need press its overcharged voltage, overdischarge, restriction charging or discharging current size etc. monitored.Because the NAS battery is the energy storage device of super high power operation, to the high power battery of this series operation, all pressures problem of cell is the problem that must solve in the series loop.General battery module operational system BMS sampling monitors when certain batteries voltage overcharges in the series circuit; Can send control signal in time; Therefore but because of the monomer whose battery capacity is big, being parallel to the cell two ends, to play the required power of the device of equal pressure effect by-pass currents bigger.Its price of such controllable devices is higher, structure is big, use in difficulty bigger.
Summary of the invention
The present invention aims to provide a kind of device that the sodium-sulphur battery group can stably be discharged and recharged.The present invention can be applied to sodium-sulphur battery and under the connection in series-parallel state, move, and obvious variation can not occur with the every batteries voltage under different service conditionss in the protection battery series arm, overcharges or overdischarge causes the damage to battery because of generation avoiding.In addition, the present invention also hopes to solve the problem of each series-connected cell branch road owing to the unbalanced formation inside modules of voltage battery pack circulation that prevent.
Particularly, the present invention proposes a kind of stable device that discharges and recharges of sodium-sulphur battery group of guaranteeing, this device can comprise at least: the sodium-sulphur battery group, and said sodium-sulphur battery group comprises a plurality of cells; And at least one configuration module; In said at least one configuration module each constitutes by a plurality of diodes; Wherein, said configuration module is parallel to each two ends of said a plurality of cells, in charge and discharge process, said cell is carried out pressure limiting.
Preferably, according to an aspect of the present invention, in above-mentioned device, said diode is preferably the heavy-duty diode unit.
Preferably, according to an aspect of the present invention, in above-mentioned device, said a plurality of heavy-duty diodes unit is one another in series.
Preferably, according to an aspect of the present invention, in above-mentioned device, the pn knot pressure drop when conducting of said heavy-duty diode unit is 0.5～0.7V.
Preferably, according to an aspect of the present invention, in above-mentioned device, the quantity of said diode is 6.
With the high power battery of commonly used series operation all the pressure mode compare, of the present inventionly guarantee that the stable heavy-duty diode cellular construction that device adopted that discharges and recharges of sodium-sulphur battery group is simpler, stable and reliable for performance and cost performance is high.For example, the price of a common 50A/400V diode only about 1 yuan, therefore can significantly reduce production costs.In addition, the configuration module external form that is made up of diode according to the present invention can conveniently be processed and install by allowing the installation site structural design.In addition, device of the present invention can also utilize 16mm
2Above ampere wires cooperates copper busbar to realize radiating treatment.
Should be appreciated that the above generality of the present invention is described and following detailed description all is exemplary and illustrative, and be intended to further explanation is provided for as claimed in claim the present invention.
Description of drawings
Comprise that accompanying drawing is for providing the present invention further to be understood, they are included and are constituted the application's a part, and accompanying drawing shows embodiments of the invention, and play the effect of explaining the principle of the invention with this specification.
In the accompanying drawing:
Fig. 1 schematically shows the structure chart of device according to a preferred embodiment of the present invention, and wherein the inside of this configuration module is composed in series by 6 diodes.
Embodiment
As stated, main purpose of the present invention is to provide a kind of device that makes the safe operation under high-power state of sodium-sulphur battery group, occurs damaging under the connection in series-parallel operation to prevent the monomer sodium-sulphur battery.
According to general principle of the present invention, the present invention uses 50A/400V heavy-duty diode unit forward operating characteristic, and each pn knot pressure drop is 0.5～0.7v during conducting.Like this, after a configuration module is formed in many heavy-duty diode unit, this configuration module is parallel to the cell two ends, thereby defines the overcharged voltage of cell.
Now with embodiments of the present invention will be described by referring to the drawings in detail.Now will be in detail with reference to the preferred embodiments of the present invention, its example is shown in the drawings.In the case of any possible, in institute's drawings attached, will use identical mark to represent same or analogous part.In addition; Although employed term is from public term, to select among the present invention; But some mentioned terms possibly be that the applicant selects by his or her judgement in the specification of the present invention, and its detailed meanings is explained in the relevant portion of the description of this paper.In addition, require not only through employed actual terms, but also will understand the present invention through the meaning that each term contained.
Fig. 1 schematically shows the structure chart of device according to a preferred embodiment of the present invention.As shown in the figure, in this embodiment, the inside of this configuration module is composed in series by 6 diodes.
For example, device shown in Figure 1 mainly comprises: sodium-sulphur battery group 101, configuration module 102 and diode 103.Particularly, sodium-sulphur battery group 101 comprises a plurality of cells 103.In the configuration module 102 each constitutes by a plurality of diodes 104.In the application, the quantity of configuration module 102 can be set by actual needs.In this embodiment, for all cells 103 in all sodium-sulphur battery groups 101 a configuration module 102 is provided all.
According to the present invention, configuration module 102 is parallel to each the two ends in a plurality of cells 104, in charge and discharge process, this cell is carried out pressure limiting.
Preferably, diode 103 of the present invention adopts the heavy-duty diode unit.For example, these heavy-duty diode unit preferably when conducting the pressure drop of pn knot within the scope of 0.5～0.7V.In configuration module 102, these heavy-duty diode unit connect with the mode that is one another in series.
In the embodiment shown in fig. 1, the quantity of the diode 103 in the single configuration module 102 is 6.Certainly, also can adjust this quantity according to the actual needs of pressure limiting.
In addition, in the embodiment shown in fig. 1, adopt the mode of series connection to connect between each cell 104.But in fact, the present invention also can be applicable to the situation that cell is connected in parallel to each other or connection in series-parallel combines in the sodium-sulphur battery group.
In the prior art, general series circuit adopts the mode of parallelly connected grading resistor to come pressure limiting, but is engraved in power consumption, heating during grading resistor.By contrast, the present invention adopts the mode of many diodes composition configuration modules to move.Therefore, only after certain monocell surpasses stop voltage, cause that the configuration module that is parallel to battery produces by-pass current, play in polyphone branch road charging process pressure limiting, up to the equal completion charging process of branch road with pressing to individual cell.
Therefore, of the present inventionly guarantee that the stable apparatus structure that discharges and recharges of sodium-sulphur battery group is simpler, stable and reliable for performance and cost performance is high.In addition, the configuration module external form that is made up of diode according to the present invention can conveniently be processed and install by allowing the installation site structural design.
Those skilled in the art can be obvious, can carry out various modifications and modification and without departing from the spirit and scope of the present invention to above-mentioned exemplary embodiment of the present invention.Therefore, be intended to that the present invention is covered and drop in appended claims and the come scope thereof to modification of the present invention and modification.
Claims (5)
1. guarantee the stable device that discharges and recharges of sodium-sulphur battery group for one kind, it is characterized in that, comprising:
The sodium-sulphur battery group, said sodium-sulphur battery group comprises a plurality of cells; And
At least one configuration module, each in said at least one configuration module constitutes by a plurality of diodes,
Wherein, said configuration module is parallel to each two ends of said a plurality of cells, in charge and discharge process, said cell is carried out pressure limiting.
2. device as claimed in claim 1 is characterized in that, said diode is the heavy-duty diode unit.
3. device as claimed in claim 2 is characterized in that, said a plurality of heavy-duty diodes unit is one another in series.
4. device as claimed in claim 3 is characterized in that, the pn knot pressure drop when conducting of said heavy-duty diode unit is 0.5～0.7V.
5. device as claimed in claim 1 is characterized in that, the quantity of said diode is 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110259718A CN102315673A (en) | 2011-09-05 | 2011-09-05 | Device for ensuring stable charging and discharging of sodium-sulfur battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110259718A CN102315673A (en) | 2011-09-05 | 2011-09-05 | Device for ensuring stable charging and discharging of sodium-sulfur battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN102315673A true CN102315673A (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110259718A Pending CN102315673A (en) | 2011-09-05 | 2011-09-05 | Device for ensuring stable charging and discharging of sodium-sulfur battery pack |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105588A (en) * | 2013-03-07 | 2013-05-15 | 上海电气钠硫储能技术有限公司 | Method for judging position of failure cell in energy storage type sodium-sulfur cell module |
| CN107359658A (en) * | 2017-07-21 | 2017-11-17 | 顾利伟 | A kind of compound mu balanced circuit for ferric phosphate lithium cell group |
| CN109888133A (en) * | 2017-12-06 | 2019-06-14 | 中国科学院沈阳自动化研究所 | A kind of long-term observation lander energy management system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3980940A (en) * | 1973-04-10 | 1976-09-14 | Mabuchi Motor Co. Ltd. | Battery equalizing system |
| NL8701955A (en) * | 1987-08-20 | 1989-03-16 | Johannes Wijnandus Maria Bodew | Series charging circuit for several batteries - has diode by=passes preventing overcharging by reducing current to trickle charge |
-
2011
- 2011-09-05 CN CN201110259718A patent/CN102315673A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3980940A (en) * | 1973-04-10 | 1976-09-14 | Mabuchi Motor Co. Ltd. | Battery equalizing system |
| NL8701955A (en) * | 1987-08-20 | 1989-03-16 | Johannes Wijnandus Maria Bodew | Series charging circuit for several batteries - has diode by=passes preventing overcharging by reducing current to trickle charge |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105588A (en) * | 2013-03-07 | 2013-05-15 | 上海电气钠硫储能技术有限公司 | Method for judging position of failure cell in energy storage type sodium-sulfur cell module |
| CN103105588B (en) * | 2013-03-07 | 2015-07-08 | 上海电气钠硫储能技术有限公司 | Method for judging position of failure cell in energy storage type sodium-sulfur cell module |
| CN107359658A (en) * | 2017-07-21 | 2017-11-17 | 顾利伟 | A kind of compound mu balanced circuit for ferric phosphate lithium cell group |
| CN109888133A (en) * | 2017-12-06 | 2019-06-14 | 中国科学院沈阳自动化研究所 | A kind of long-term observation lander energy management system |
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Application publication date: 20120111 |