CN203504219U - Parallel charging maintenance device of battery group - Google Patents

Parallel charging maintenance device of battery group Download PDF

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Publication number
CN203504219U
CN203504219U CN201320571992.4U CN201320571992U CN203504219U CN 203504219 U CN203504219 U CN 203504219U CN 201320571992 U CN201320571992 U CN 201320571992U CN 203504219 U CN203504219 U CN 203504219U
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China
Prior art keywords
maintenance
battery pack
parallel
concurrent
circuit
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Expired - Lifetime
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CN201320571992.4U
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Chinese (zh)
Inventor
高万兵
郭盛昌
高文超
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China Lithium Battery Technology Co Ltd
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China Aviation Lithium Battery Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

The utility model relates to a parallel charging maintenance device of a battery group. The parallel charging maintenance device comprises a power factor correction PFC circuit, a rectification and filtering circuit and a parallel maintenance module, wherein the parallel maintenance module comprises parallel maintenance channels which correspond to single batteries of the battery group; an input of the PFC circuit is connected with alternate current outside the battery group, and an output of the PFC circuit is connected with the rectification and filtering circuit; an output terminal of the rectification and filtering circuit is connected with the parallel maintenance module through a bus; and the parallel maintenance channels of the parallel maintenance module are respectively connected with the positive electrodes and negative electrodes of the signal batteries. The parallel charging maintenance device is advantageous in that: an one-to-one mode is employed to charging the plurality of single batteries which are in sub-saturation states, of the battery group at the same time, so that consistency of the batteries is improved; only one power change is needed in a charging maintenance process, so that energy utilization rate is improved; and each single battery is provided with an independent parallel maintenance channel, when one of the parallel maintenance channel is in a failure or damaged, maintenance works for other circuits are not influenced, so that reliability of the maintenance system is improved.

Description

A kind of battery pack charge maintenance device that walks abreast
Technical field
The invention belongs to battery service technical field, relate to the parallel charge maintenance device of a kind of battery pack.
Background technology
For the maintenance strategy of lithium battery, according to system integration form, can be divided into off-line type and online two kinds in the market, off-line type maintenance mode is mainly used to regularly the poor battery pack of consistency or battery system partly or entirely be safeguarded, this maintenance is not integrated in battery system inside with equipment, with battery, change into machine, balance charger is representative, for small-scale cell, safeguard, maintenance efficiency is high, capacity usage ratio is high, but the general volume of this kind equipment is large, in maintenance, cost of labor has high input, for safeguarding, extensive battery system wastes time and energy, the large-scale energy-accumulating power station battery system maintenance that this maintenance mode is built at present adopts, online maintenance mode is inner by maintenance system being integrated in to battery pack or battery system, this maintenance mode can be realized maintenance in battery pack or battery system charge and discharge process, take with balanced battery management system is representative, and this maintenance mode is by most battery and battery applications system manufacturers is general adopts.
Online maintenance system mainly contains active and two kinds of forms of passive type, and two kinds of modes all can produce power loss in balancing procedure, and the capacitance loss producing when passive type is balanced is larger, and euqalizing current is little, in general application, seldom adopts; And active equalization mode exists, energy conversion efficiency is low, the problem of balanced poor in timeliness.
Active on-line maintenance system is balanced in the charging stage, has both contributed to improve the consistency of battery system, is of value to the storage power that increases battery system; Balanced concerning battery system in standing process and discharge process, although improve the consistency of battery system, also caused the capacitance loss of energy-storage system.Suppose every 12 the battery management system balance modules that cell arrangement 10A euqalizing current ability, energy conversion efficiency are 60% of battery pack, with the operating mode operation of 0.3C charging and discharging currents, 1 hour time of repose.Test by experiment, if the cell pressure reduction of take is greater than 30mV as opening the condition of battery management system equilibrium, in whole energy-storage system running, battery management system is mop-up equalization, it is 2.5Ah that charging process can realize cell average isostatic capacity, in discharge process and standing process, can realize cell average isostatic capacity is 3.3Ah, but discharge process and standing process exist the energy loss of battery management system balance module self, the cell average size loss that can cause energy-storage system is 2.5Ah; If the cell pressure reduction of take is greater than 50mV as opening the condition of battery management system equilibrium, in charging process, time for balance is less than 40%, in discharge process, time for balance is greater than 80%, in standing process, time for balance is 100%, charging process can realize cell average isostatic capacity and be less than 1Ah, in discharge process and standing process, can realize cell average isostatic capacity is 3.3Ah, but discharge process and standing process exist the energy loss of battery management system balance module self, the cell average size loss that can cause energy-storage system is 2.5Ah.In discharging and recharging whole process, take respectively the service equipment that 30mV and 50mV be balanced unlocking condition, the average discharge capacity of cell that can increase energy-storage system is less than respectively 3.3Ah and 1.8Ah, and for being greater than 360Ah battery pack, this maintenance mode can be described as an utterly inadequate amount.
In practical application, otherness due to internal resistance of single cell and battery rated capacity, internal resistance is larger, rated capacity is lower, the corresponding cell of institute change in voltage in charge and discharge process is larger, the result that this phenomenon causes is that balanced starting differential pressure is less, according to voltage, judges that the probability that the battery management system of balanced unlocking condition occurs that mistake is balanced is larger, and this consistency that also can fundamentally cause energy-storage system worse and worse.In addition, active balanced way is impossible Operation at full power in maintenance process, and this also can cause the actual value that in whole energy-storage system, cell average size increases less than calculated value.Therefore, the maintenance efficiency of the online active maintenance mode adopting in the market in charge and discharge process exists that balanced efficiency is low, the problem of balanced poor in timeliness, can not meet practical application request on market.
Utility model content
The purpose of this utility model is to provide the parallel charge maintenance device of a kind of battery pack, to solve the maintenance efficiency of existing online active maintenance mode in charge and discharge process, has that balanced efficiency is low, the problem of balanced poor in timeliness.
For achieving the above object, the parallel charge maintenance device of a kind of battery pack of the present utility model comprises power factor correction pfc circuit, current rectifying and wave filtering circuit and concurrent maintenance module, this concurrent maintenance module comprises the concurrent maintenance passage with the corresponding setting of cell in battery pack, described pfc circuit is for inputting the alternating current that connects battery pack outside, output connects current rectifying and wave filtering circuit, the output of this current rectifying and wave filtering circuit connects concurrent maintenance module by bus, and each concurrent maintenance passage in this concurrent maintenance module is connected with each cell both positive and negative polarity respectively.
Further, described concurrent maintenance module comprises supervisory circuit, is connected respectively with each concurrent maintenance module communication.
Further, described concurrent maintenance module comprises the control switch of being located at before described power factor correction pfc circuit.
Further, the input of described concurrent maintenance device and output electrical isolation.
Further, described concurrent maintenance passage comprises reduction voltage circuit.
Further, described reduction voltage circuit output is connected with cell charging voltage-limiting protection, output overloading protection, output short circuit protection, cell under-voltage protection, exports anti-reverse protection, output current reverse-filling, output state indicating member.
Further, described state indicating device is indicator light.
The parallel charge maintenance device of battery pack of the present invention adopts the mode with batteries charging machine parallel join, after batteries charging finishes, by pattern one to one, a plurality of cells of battery pack Central Asia saturation condition are charged simultaneously, guarantee that in battery pack, every cell reaches full power state, thereby raising battery consistency, charge maintenance process is power conversion for once, and capacity usage ratio is high; Each cell configures independently concurrent maintenance passage, when having a parallel charge maintenance passage operational failure or damaging, can not affect the maintenance work of other circuit, has improved the reliability of maintenance system; This device volume is little, easy to use, can be integrated in one with battery pack, can realize at every turn after charging electricity the cell in battery pack is mended to electricity, also can not be integrated in one with battery pack, be designed to portable battery pack charging system, realize battery system periodic maintenance.
Accompanying drawing explanation
Fig. 1 is the parallel charge maintenance schematic diagram of device of battery pack of the present utility model;
Fig. 2 is concurrent maintenance module electrical diagram of the present utility model.
Embodiment
The parallel charge maintenance device of battery pack comprises pfc circuit, power factor correction when pfc circuit exchanges input for the parallel charge maintenance device of battery pack, and input connects the alternating current of battery pack outside, and output connects current rectifying and wave filtering circuit; The parallel charge maintenance device of described battery pack comprises current rectifying and wave filtering circuit, and current rectifying and wave filtering circuit is for alternating current is carried out to the voltage ripple after rectification filtering rectification, and input connects pfc circuit, and output connects concurrent maintenance module by bus; The parallel charge maintenance device of described battery pack comprises concurrent maintenance module, concurrent maintenance module for to series battery after serial connection charge finishes, by pattern one to one, the cell of battery pack Central Asia saturation condition is charged separately; The parallel charge maintenance device of described battery pack also comprises control switch and supervisory circuit, pfc circuit prime design control switch, access and disconnection for alternating current, each concurrent maintenance module of while has the communication function with supervisory circuit, for the feedback of concurrent maintenance module running status and fault message, realize data centralization monitoring and process; Parallel charge maintenance device is input as alternating current, is output as constant current voltage limiting mode dc electricity, and wherein current value can be safeguarded electric current design according to batteries is needed, and magnitude of voltage can design according to the difference of battery types and applying working condition; Parallel charge maintenance device input and output electrical isolation; Each concurrent maintenance module comprises a concurrent maintenance passage independently above, separate between each concurrent maintenance passage, non-interference during operation; Parallel charge maintenance device is with good expansibility, and can support to realize for the battery pack that series connection quantity is greater than more than 2 strings the charging device of safeguarding that benefit is electric simultaneously; Concurrent maintenance passage is input as the direct current of rectifying and wave-filtering, after reduction voltage circuit step-down, is each cell charging of battery pack.
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
The parallel charge maintenance device of battery pack as shown in Figure 1, comprises pfc circuit, current rectifying and wave filtering circuit, concurrent maintenance module, supervisory circuit and air switch.Alternating current is after power factor correction pfc circuit is adjusted, through current rectifying and wave filtering circuit, alternating current is converted to level and smooth direct current, then access the concurrent maintenance module of a plurality of parallel joins, the both positive and negative polarity of each concurrent maintenance module is connected to respectively cell B in series battery successively 1, B 2b mboth positive and negative polarity, pfc circuit prime design air switch, for access and the disconnection of electric main, each concurrent maintenance module of while has the communication function with supervisory circuit, for the feedback of concurrent maintenance module running status and fault message, realize data centralization monitoring and process.The parallel charge maintenance device of battery pack is with good expansibility, and can support the battery pack that is greater than 2 strings for series connection quantity to realize the charging device of safeguarding that benefit is electric simultaneously.
Wherein, the electrical diagram of concurrent maintenance module as shown in Figure 2.Concurrent maintenance module comprises m independent 3.6V2A concurrent maintenance passage, and the input of parallel charge maintenance device and output isolation guarantee isolation mutually between each concurrent maintenance channel output end.The direct voltage that is input as current rectifying and wave filtering circuit output of concurrent maintenance passage, be output as 3.6V2A constant current voltage limiting pattern, wherein current value can be safeguarded electric current design according to battery pack is needed, and magnitude of voltage can design according to the difference of battery rated voltage and applying working condition.Each concurrent maintenance module has input state deixis simultaneously, if when input state is normal, indicator light is lighted, if when input state is undesired, indicator light extinguishes.
The concurrent maintenance passage that concurrent maintenance module comprises is input as the direct current of rectifying and wave-filtering, after reduction voltage circuit step-down, is each cell charging of battery pack.The mode of operation of concurrent maintenance passage is: 1), when having the input of interchange, concurrent maintenance passage is started working, and first automatically detects current monomer battery voltage state, and under monomer battery voltage≤battery undervoltage, in limited time, without any output, indicator light extinguishes; When monomer battery voltage > over-charging of battery deboost, after time delay a period of time, if still keep this state, concurrent maintenance passage enters charging completion status, and indicator light changes redness into; 2) when battery is normal, concurrent maintenance passage enters constant current output pattern, and indicator light is green, when concurrent maintenance access port output voltage being detected and reach deboost, time delay certain hour, concurrent maintenance passage stops output, and entering into charging completion status, indicator light changes redness into; 3) when concurrent maintenance passage enters into charging completion status, passage enters self-locking state, and indicator light changes redness into, needs to disconnect input, connects input, could normally work.
Concurrent maintenance passage has cell charging voltage-limiting protection, output overloading protection, output short circuit protection, cell under-voltage protection, exports the functions such as anti-reverse measure, the measure of output current reverse-filling, output state indication.During the operation of concurrent maintenance passage, when output voltage reaches pressure limiting set point, the increase of its output voltage of volitional check, prevents that concurrent maintenance passage is to certain cell charging overvoltage; When the output of concurrent maintenance passage surpasses rated power, close output, indicator light extinguishes, and after fault is got rid of, concurrent maintenance passage is resumed work automatically; Before concurrent maintenance passage operation, during output short-circuit, after energising, do not start, indication does not work, and in the course of work, during output short-circuit, closes output, and indicator light extinguishes, and after fault is discharged, concurrent maintenance routing restoration is normally worked; When concurrent maintenance passage inputs or outputs voltage and is less than under-voltage protection value, close output, indicator light extinguishes, and after fault is got rid of, concurrent maintenance passage is resumed work automatically; During the both positive and negative polarity reversal connection of concurrent maintenance passage DC output end and cell, after energising, do not start, indicator light extinguishes, and after fault is got rid of, concurrent maintenance passage is resumed work automatically; Concurrent maintenance passage has the measure of output current reverse-filling, while normally moving, if ac input end power-off, the electric current of the battery concurrent maintenance passage that can not reflux.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, without departing from the concept of the premise utility; can also make some improvements and modifications, these improvements and modifications also should be considered as in protection range of the present utility model.

Claims (7)

1. the parallel charge maintenance device of a battery pack, it is characterized in that, this device comprises power factor correction pfc circuit, current rectifying and wave filtering circuit and concurrent maintenance module, this concurrent maintenance module comprises the concurrent maintenance passage with the corresponding setting of cell in battery pack, described pfc circuit is for inputting the alternating current that connects battery pack outside, output connects current rectifying and wave filtering circuit, the output of this current rectifying and wave filtering circuit connects concurrent maintenance module by bus, and each concurrent maintenance passage in this concurrent maintenance module is connected with each cell both positive and negative polarity respectively.
2. the parallel charge maintenance device of a kind of battery pack according to claim 1, is characterized in that: described concurrent maintenance module comprises supervisory circuit, is connected respectively with each concurrent maintenance module communication.
3. the parallel charge maintenance device of a kind of battery pack according to claim 1, is characterized in that: described concurrent maintenance module comprises the control switch of being located at before described power factor correction pfc circuit.
4. the parallel charge maintenance device of a kind of battery pack according to claim 1, is characterized in that: the input of described concurrent maintenance module and output electrical isolation.
5. according to the parallel charge maintenance device of a kind of battery pack described in any one in claim 1-4, it is characterized in that: described concurrent maintenance passage comprises reduction voltage circuit.
6. the parallel charge maintenance device of a kind of battery pack according to claim 5, is characterized in that: described reduction voltage circuit output is connected with cell charging voltage-limiting protection, overload protection, short-circuit protection, cell under-voltage protection, anti-reverse protection, electric current reverse-filling, state indication unit.
7. the parallel charge maintenance device of a kind of battery pack according to claim 6, is characterized in that: described state indication unit is indicator light.
CN201320571992.4U 2013-09-13 2013-09-13 Parallel charging maintenance device of battery group Expired - Lifetime CN203504219U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104124743A (en) * 2014-07-25 2014-10-29 株洲南车时代电气股份有限公司 Storage battery charging device
CN110034345A (en) * 2019-01-18 2019-07-19 中北智杰科技(北京)有限公司 Modular battery group, electric device and modular battery group management method
CN111682629A (en) * 2020-06-22 2020-09-18 深圳市富兰瓦时技术有限公司 Power supplementing system and method for energy storage device
CN111817406A (en) * 2020-09-08 2020-10-23 博众精工科技股份有限公司 Power supply system and maintenance method of battery pack
CN112909355A (en) * 2019-12-04 2021-06-04 宁德时代新能源科技股份有限公司 Battery management system, processing device, battery management method and battery management and control system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104124743A (en) * 2014-07-25 2014-10-29 株洲南车时代电气股份有限公司 Storage battery charging device
CN104124743B (en) * 2014-07-25 2017-01-11 株洲南车时代电气股份有限公司 Storage battery charging device
CN110034345A (en) * 2019-01-18 2019-07-19 中北智杰科技(北京)有限公司 Modular battery group, electric device and modular battery group management method
CN112909355A (en) * 2019-12-04 2021-06-04 宁德时代新能源科技股份有限公司 Battery management system, processing device, battery management method and battery management and control system
US11929469B2 (en) 2019-12-04 2024-03-12 Contemporary Amperex Technology Co., Limited Battery management system, processing device, battery management method, and battery management and control system
CN111682629A (en) * 2020-06-22 2020-09-18 深圳市富兰瓦时技术有限公司 Power supplementing system and method for energy storage device
WO2021258675A1 (en) * 2020-06-22 2021-12-30 深圳市富兰瓦时技术有限公司 Energy storage device charging system and method
CN111817406A (en) * 2020-09-08 2020-10-23 博众精工科技股份有限公司 Power supply system and maintenance method of battery pack

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Effective date of registration: 20220104

Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province

Patentee after: Zhongchuangxin Aviation Technology Co.,Ltd.

Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province

Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd.

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Granted publication date: 20140326

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