CN203747460U - Novel lithium battery BMS power supply system - Google Patents
Novel lithium battery BMS power supply system Download PDFInfo
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- CN203747460U CN203747460U CN201420063969.9U CN201420063969U CN203747460U CN 203747460 U CN203747460 U CN 203747460U CN 201420063969 U CN201420063969 U CN 201420063969U CN 203747460 U CN203747460 U CN 203747460U
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- lithium battery
- power supply
- supply system
- mcu
- bms
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Abstract
The utility model relates to the technical field of a battery management system, and particularly discloses a novel lithium battery BMS power supply system. The novel lithium battery BMS power supply system provided by the utility model comprises lithium battery groups, acquisition circuits, MCUs, a main control MCU and an electrical switch. The electrical switch is connected with the main control MCU. The lithium battery groups are connected with the acquisition circuits. The acquisition circuits are connected with the MCUs. Each acquisition circuit is corresponding to an independent MCU. Each independent MCU is connected with the main control MCU through a serial bus. According to the utility model, the novel lithium battery BMS power supply system has the advantages of easy single lithium battery group replacement, easy system maintenance and convenient voltage expansion and voltage reduction, and the safety of an energy storage product is improved.
Description
Technical field
The utility model relates to battery management system technical field, especially relates to one and is applied in lithium battery BMS novel power supply system in energy-storage system.
Background technology
Battery management system (BATTERY MANAGEMENT SYSTEM is called for short BMS) is the tie between battery and user, and main object is secondary cell.There are some shortcomings below in secondary cell, as few in stored energy, the life-span is short, connection in series-parallel is used problem, safety in utilization, battery electric quantity estimation difficulty etc.The performance of battery is that very complicated, dissimilar battery behavior also differs greatly.Battery management system (BMS) is exactly mainly in order to improve the utilance of battery, prevents that battery from occurring overcharging and over-discharge can, extends the useful life of battery, the state of monitoring battery.
Green energy-storing product based on ferric phosphate lithium cell is most widely used at present, but due to the characteristic of lithium battery, in use inevasible damage and the inefficacy that has battery pack, in current lithium battery energy storage battery system, when a Battery pack wherein lost efficacy and caused the operating state of whole system to occur when abnormal, designer cannot keep in repair efficiently or change it, or even occur after above-mentioned situation to need whole battery system to change, the high or inconvenient maintenance of maintenance cost is an energy-storage system large technical barrier in actual applications.
Just can not be from amendment with it after once the battery voltage of current existing energy-storage system designs, after system voltage requires along with applied environment change, what whole lithium battery group faced is to change, scrap.Product cost is increased, give to use to promote and make troubles.
Progressively universal along with green energy resource, lithium battery energy storage battery system applies is also more and more extensive, how to design a kind ofly to maintain easily and change and the random energy-storage system of diffusion, decompression, and has higher fail safe simultaneously, is still a difficult problem for current research; Also do not have at present effective scheme to solve the problems referred to above.
Utility model content
The technical problem that the utility model solves is to provide a kind of lithium battery BMS novel power supply system, and the utility model has been realized single-lithium-battery pond group and easily changed, system easy care, the object that facilitates power-supply system diffusion to reduce pressure, the fail safe that has simultaneously improved energy storaging product.
In order to solve the problems of the technologies described above, the utility model provides a kind of lithium battery BMS novel power supply system; Comprise: lithium battery group, Acquisition Circuit, MCU, main control MCU and electric switch;
Described electric switch is connected with described main control MCU; Described lithium battery group is connected with described Acquisition Circuit, and described Acquisition Circuit is connected with described MCU, the corresponding described MCU independently of each described Acquisition Circuit, and each independently described MCU is connected with described main control MCU by universal serial bus.
Preferably, the quantity that described lithium battery group comprises lithium battery is 4～24 strings, and described lithium battery group is that every a string described lithium battery is connected step by step, and the capacity of every a string described lithium battery is identical; The total voltage of described lithium battery group is the voltage sum of the described lithium battery of all strings; Often a string is that described lithium battery is the lithium battery parallel connection of the single nominal voltage of at least one.
More preferably, the quantity of described MCU is no less than 1.
More preferably, the corresponding described lithium battery group of a described MCU.
More preferably, described electric switch adopts relay or contactor.
More preferably, described Acquisition Circuit is battery management chip.
More preferably, described battery management chip adopts LTC6802 battery detection chip.
More preferably, described LTC6802 battery detection chip adopts level to move serial line interface.
More preferably, described in multi-disc, LTC6802 battery detection chip is directly connected in series.
The course of work of the present utility model is,
Each independent MCU can carry out electric quantity acquisition to the battery pack that is 24 strings to the maximum by gathering front end, and multiple MCU can carry out electric quantity acquisition to the battery pack of more string numbers, by universal serial bus, battery information is uploaded to main control MCU afterwards, main control MCU judges current system state according to the quantity of MCU and the content of uploading information.In the time that in system, certain batteries lost efficacy or was replaced, main control MCU receives reporting an error after information of uploading, and the power supply of system is made to corresponding control, safeguards or changes thereby realize online lithium battery, improves security of system.
In the time having new battery pack access (diffusion) or existing battery pack to be pulled out, main control MCU detects by universal serial bus the quantity that existing MCU can normally work, and electric switch is made to corresponding control, reaches the object of online diffusion decompression.The battery failure of single-unit or while being replaced, MCU detects broken string state, uploads abnormal state information, main control MCU is not calculated the row in normal work.
Wherein, described MCU (Micro Control Unit) Chinese is micro-control unit, claim again one chip microcomputer (Single Chip Microcomputer) or single-chip microcomputer, refer to appearance and development thereof along with large scale integrated circuit, by the CPU of computer, RAM, ROM, timer conter and multiple I/O Interface integration on a slice chip, form the computer of chip-scale, for doing various combination control in different application scenarios.
The utility model compared with prior art, has following beneficial effect:
(1) the utility model proposes a kind of lithium battery BMS novel power supply system, not only can change single-lithium-battery pond group very easily; Also can arbitrarily carry out diffusion and decompression to battery pack.
(2) the utility model system is easily safeguarded, has improved the fail safe of energy storaging product simultaneously; The later maintenance cost of energy storaging product is reduced greatly.
Brief description of the drawings
Fig. 1 exemplarily shows the utility model structural representation;
Fig. 2 exemplarily shows the utility model system power supply output switch switching principle schematic diagram.
Reference numeral shown in Fig. 1～Fig. 2 is as follows: 1, Acquisition Circuit, 2, MCU, 3, main control MCU, 4, universal serial bus, 5, electric switch, 6, lithium battery group.
Embodiment
For the technical problem that the utility model solves, the technical scheme providing are provided better, below in conjunction with drawings and Examples, the utility model is further elaborated.Specific embodiment described herein is only in order to explain enforcement of the present utility model, but and is not used in restriction the utility model.
In order to solve the problems of the technologies described above, the utility model provides a kind of lithium battery BMS novel power supply system,
In a preferred embodiment, Fig. 1 exemplarily shows structural representation of the present utility model; Comprise: lithium battery group 6, Acquisition Circuit 1, MCU2, main control MCU 3 and electric switch 5;
Described electric switch 5 is connected with described main control MCU 3; Described lithium battery group 6 is connected with described Acquisition Circuit 1, and described Acquisition Circuit 1 is connected with described MCU2, the corresponding described MCU2 independently of each described Acquisition Circuit 1, and each independently described MCU2 is connected with described main control MCU 3 by universal serial bus 4.
In the embodiment being more preferably, the quantity that described lithium battery group 6 comprises lithium battery is 4～24 strings, and described lithium battery group 6 is that every a string described lithium battery is connected step by step, and the capacity of every a string described lithium battery is identical; The total voltage of described lithium battery group 6 is the voltage sum of the described lithium battery of all strings; Often a string is that described lithium battery is the lithium battery parallel connection of the single nominal voltage of at least one.
In the embodiment being more preferably, the quantity of described MCU2 is no less than 1.
In the embodiment being more preferably, the corresponding described lithium battery group 6 of a described MCU2.
In the embodiment being more preferably, described main control MCU 3 is the control units taking MCU2 as core; The information that described main control MCU 3 is responsible for other all MCU2 to pass over gathers, and whole power-supply system is carried out to entirety and control.
In the embodiment being more preferably, described electric switch 5 adopts relay or contactor; Described electric switch 5 is controlled it by main control MCU 3 and is opened and closed, thereby has realized the output control of whole power-supply system.
In the embodiment being more preferably, described Acquisition Circuit 1 is battery management chip.
In the embodiment being more preferably, described battery management chip adopts LTC6802 battery detection chip; Battery management chip passes to MCU2 by the cell voltage collecting by serial communication.
In the embodiment being more preferably, described LTC6802 battery detection chip adopts level to move serial line interface; LTC6802 is a battery detection chip, and inside comprises the analog to digital converter of 12 bit resolutions, high-accuracy voltage reference source, high voltage input multiplexer and serial line interface.Every LTC6802 can measure 12 joint voltage of serially-connected cells, maximum 60 volts of the measuring voltages that allow.Can monitor all batteries voltage simultaneously or monitor separately the arbitrary batteries in series-connected cell.
In the embodiment being more preferably, LTC6802 battery detection chip is directly connected in series described in multi-disc; Between chip without optocoupler or isolating device.
Specific embodiment:
Each MCU2 controls collection front end the state information of battery pack is gathered to (maximum 24 strings), and the battery information of collection is uploaded to main control MCU 3 through universal serial bus 4, and main control MCU 3 determines whether open system power sourced electric switch 5 by the state information of uploading.Can greatly improve like this system power supply safety, simultaneously in the situation that battery pack is changed or lost efficacy, main control MCU 3 is controlled power supply output and is also disconnected, so maintenance personal only need change and not need system miscellaneous part to change together failed battery pack targetedly.
As shown in Figure 2; The positive pole of B+ representative system power supply, the negative pole of B-representative system power supply; In the time that system needs diffusion, the battery pack for the treatment of diffusion is connected serially to original system, main control MCU 3 receives by universal serial bus 4 after the state information of diffusion battery pack, and original system mains switch is closed, and open the corresponding mains switch of new access and complete diffusion operation,
The present embodiment is 3 Battery pack groups, but is not limited to 3 groups.The system requiring according to difference, battery pack quantity can infinitely be connected.
More than by preferred and description that specific embodiment is detailed the utility model; but those skilled in the art should be understood that; the utility model is not limited to the above embodiment; all within general principle of the present utility model; any amendment of doing, combine and be equal to replacement etc., within being all included in protection range of the present utility model.
Claims (9)
1. a lithium battery BMS novel power supply system, is characterized in that, comprising: lithium battery group, Acquisition Circuit, MCU, main control MCU and electric switch; Described electric switch is connected with described main control MCU; Described lithium battery group is connected with described Acquisition Circuit, and described Acquisition Circuit is connected with described MCU, the corresponding described MCU independently of each described Acquisition Circuit, and each independently described MCU is connected with described main control MCU by universal serial bus.
2. lithium battery BMS novel power supply system according to claim 1, is characterized in that, the quantity that described lithium battery group comprises lithium battery is 4～24 strings, and described lithium battery group is that every a string described lithium battery is connected step by step, and the capacity of every a string described lithium battery is identical; The total voltage of described lithium battery group is the voltage sum of the described lithium battery of all strings; Often a string is that described lithium battery is the lithium battery parallel connection of the single nominal voltage of at least one.
3. lithium battery BMS novel power supply system according to claim 1 and 2, is characterized in that, the quantity of described MCU is no less than 1.
4. lithium battery BMS novel power supply system according to claim 1 and 2, is characterized in that, the corresponding described lithium battery group of a described MCU.
5. lithium battery BMS novel power supply system according to claim 1 and 2, is characterized in that, described electric switch adopts relay or contactor.
6. lithium battery BMS novel power supply system according to claim 1 and 2, is characterized in that, described Acquisition Circuit is battery management chip.
7. lithium battery BMS novel power supply system according to claim 6, is characterized in that, described battery management chip adopts LTC6802 battery detection chip.
8. lithium battery BMS novel power supply system according to claim 7, is characterized in that, described LTC6802 battery detection chip adopts level to move serial line interface.
9. lithium battery BMS novel power supply system according to claim 8, is characterized in that, LTC6802 battery detection chip is directly connected in series described in multi-disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420063969.9U CN203747460U (en) | 2014-02-13 | 2014-02-13 | Novel lithium battery BMS power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420063969.9U CN203747460U (en) | 2014-02-13 | 2014-02-13 | Novel lithium battery BMS power supply system |
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| CN203747460U true CN203747460U (en) | 2014-07-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917276A (en) * | 2015-06-11 | 2015-09-16 | 三峡大学 | Photovoltaic energy storage BMS system |
| CN108001265A (en) * | 2017-11-24 | 2018-05-08 | 安徽特凯新能源科技有限公司 | A kind of battery management system equipped with serial communication detection |
| CN112054565A (en) * | 2019-06-06 | 2020-12-08 | 加百裕工业股份有限公司 | Battery management system and method |
-
2014
- 2014-02-13 CN CN201420063969.9U patent/CN203747460U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917276A (en) * | 2015-06-11 | 2015-09-16 | 三峡大学 | Photovoltaic energy storage BMS system |
| CN108001265A (en) * | 2017-11-24 | 2018-05-08 | 安徽特凯新能源科技有限公司 | A kind of battery management system equipped with serial communication detection |
| CN112054565A (en) * | 2019-06-06 | 2020-12-08 | 加百裕工业股份有限公司 | Battery management system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160329 Address after: 100000, Beijing, Changping District science and Technology Park, super Road, No. 3, building 2140, room 9 Patentee after: CSIC Yuanzhou (Beijing) Science & Technology Co., Ltd. Address before: 100000, room 2359, block B, building 9, building No. 3, front road, Changping District science and Technology Park, Beijing Patentee before: BEIJING HAITE YUANZHOU NEW ENERGY TECHNOLOGY CO., LTD. |
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| 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: 20140730 Termination date: 20190213 |