CN212113841U - Lithium battery energy storage system based on SPI data link communication - Google Patents
Lithium battery energy storage system based on SPI data link communication Download PDFInfo
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- CN212113841U CN212113841U CN202021207396.4U CN202021207396U CN212113841U CN 212113841 U CN212113841 U CN 212113841U CN 202021207396 U CN202021207396 U CN 202021207396U CN 212113841 U CN212113841 U CN 212113841U
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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
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Abstract
The utility model discloses a lithium cell energy storage system based on SPI data link communication relates to the lithium cell field, including UPS power, battery management unit, battery monitoring unit and battery module, the battery module is equipped with a plurality of and establishes ties together, and every battery module is connected with a battery monitoring unit, battery monitoring unit still is connected with battery management unit, battery management unit is connected with the UPS power, and battery management unit still connects the warning light, the UPS power still is connected with the battery module, carries out voltage and temperature sampling in real time through battery monitoring unit, has splendid battery balance function, adopts daisy chain mode to link the structure, realizes that battery monitoring unit BMU and battery management unit MCU's annular concatenates the communication. Meanwhile, the dry contact communication function of the large UPS is utilized, high-voltage and high-power electric devices in the traditional management system are removed, and the distributed lithium battery energy storage system framework is simplified.
Description
Technical Field
The utility model relates to a lithium cell field, concretely relates to lithium cell energy storage system based on SPI data link communication.
Background
In the application of the lithium battery in the UPS, the framework design of the lithium battery management system becomes one of the key factors for realizing high reliability and high performance of the lithium battery application. The lithium battery pack is limited to large-scale assembly, most of lithium battery pack designs adopt a distributed management system to carry control hardware, so that the electrical noise working environment of the lithium battery, related electrical devices and the UPS has very high requirements on a data communication link, and the communication link carries all information transmission of the battery management system. Although the widely-used CANBUS can handle such noise, due to the fact that the number of battery packs in UPS application is large, data transmission throughput requirements of a battery pack monitoring unit and a main control unit can cause a CANBUS congestion problem, and meanwhile, uncertainty of a distributed structure is also an unstable factor of CANBUS communication. Usually, in order to ensure the CANBUS communication quality, an isolated CAN communication module must be selected for the CANBUS communication mode, and the advantages of a distributed system cannot be realized in a structured design due to the related component cost.
Disclosure of Invention
An object of the utility model is to provide a lithium cell energy storage system based on SPI data link communication carries out voltage and temperature sampling in real time through battery monitoring unit, has splendid battery balance function, adopts the daisy chain mode to link the structure, realizes that battery monitoring unit BMU and battery management unit MCU's annular concatenates the communication. Meanwhile, the dry contact communication function of the large UPS is utilized, high-voltage and high-power electric devices in the traditional management system are removed, and the distributed lithium battery energy storage system framework is simplified.
The utility model provides a lithium cell energy storage system based on SPI data link communication, includes UPS power, battery management unit, battery monitoring unit and battery module, the battery module is equipped with a plurality of and establishes ties together, and every battery module is connected with a battery monitoring unit, battery monitoring unit still is connected with battery management unit, battery management unit is connected with the UPS power, and battery management unit still connects the warning light, the UPS power still is connected with the battery module.
Preferably, isolation SPI communication is adopted between the battery monitoring units and the battery management unit, and the isolation type daisy chain is used for connection, and redundant communication is performed through two ends of the daisy chain.
Preferably, the battery module is formed by connecting a plurality of lithium iron phosphate batteries in series.
Preferably, the battery monitoring unit adopts an LTC6811 chip to perform voltage and temperature sampling and balance management on the battery module.
Preferably, the battery management unit is further connected with a mobile inspection device.
Preferably, the warning lamp includes a yellow fault lamp, a red warning lamp and a green running lamp.
The utility model has the advantages that: the battery monitoring unit samples voltage and temperature in real time, has an excellent battery balancing function, and realizes the annular serial connection communication between the BMU and the MCU by adopting a daisy chain mode link structure. Meanwhile, the dry contact communication function of the large UPS is utilized, high-voltage and high-power electric devices in the traditional management system are removed, and the distributed lithium battery energy storage system framework is simplified.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
the mobile inspection device comprises a UPS (uninterrupted power supply), 2, a battery management unit, 3, a battery monitoring unit, 4, a battery module, 5, a lithium iron phosphate battery, 6, a prompting lamp and 7, and is mobile.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the functions of the invention easy to understand, the invention is further explained by combining the specific embodiments.
As shown in FIG. 1, a lithium battery energy storage system based on SPI data link communication, including UPS power 1, battery management unit 2, battery monitoring unit 3 and battery module 4, battery module 4 is equipped with a plurality of and establishes ties together, and every battery module 4 is connected with a battery monitoring unit 3, battery monitoring unit 3 still is connected with battery management unit 2, battery management unit 2 is connected with UPS power 1, and battery management unit 2 still connects warning light 6, UPS power 1 still is connected with battery module 4.
Isolation SPI communication is adopted between the battery monitoring units 3 and the battery management unit 2 so as to connect the isolation type daisy chain and carry out redundant communication through two ends of the daisy chain. The battery monitoring unit 3 and the battery management unit 2 adopt isoSPI to isolate SPI communication, and isoSPI data link communication can realize high-speed, RF interference resistance and long-distance communication. The battery management unit MCU periodically and individually addresses each BMU, cascade-connects in an isolated daisy chain, and performs redundant communication through both ends of the daisy chain, so that the system can continue to operate even if a single point of failure occurs on the harness. Therefore, a communication mode with high efficiency, interference resistance, high reliability and stability is realized.
The battery module 4 is formed by connecting a plurality of lithium iron phosphate batteries 5 in series. Preferably 8 lithium iron phosphate batteries 5 are connected in series.
The battery monitoring unit 3 adopts an LTC6811 chip to sample and balance the voltage and the temperature of the battery module 4. The battery monitoring unit 3 is based on the battery voltage and temperature sampling of the LTC6811 chip, has the characteristics of high sampling precision, low EMI sensitivity and low radiation, and adopts a low data acquisition rate to realize high noise suppression. A passive battery charge balancing mechanism with a controlled battery charge balancing mechanism and a programmable timer.
The battery management unit 2 is also connected with a mobile inspection device 7. The mobile inspection equipment 7 can adopt a universal portable inspection device, and is simple to purchase and maintain.
The warning lamp 6 includes a yellow fault lamp, a red warning lamp and a green running lamp. Increase warning light 6 and remove equipment 7 of patrolling and examining, conveniently patrol and examine and maintain.
The specific implementation mode and principle are as follows:
the system comprises a battery management unit 2, a plurality of battery modules 4, a battery monitoring unit 3, a UPS (uninterrupted power supply) 1 and a universal movable inspection device, wherein each battery module 4 is provided with one battery monitoring unit 3.
Isolation SPI communication is adopted between the battery monitoring units 3 and between the battery monitoring units and the battery management unit 2, the battery monitoring units are connected in an isolation daisy chain, and redundant communication is carried out through two ends of the daisy chain. The battery monitoring unit 3 is designed to realize the voltage and temperature sampling and battery balancing functions of a lithium battery based on an LTC6811 chip, the battery management unit 2 is externally provided with two paths of dry contact signals, one path of charging dry contact, and the battery module 4 provides the dry contact signal to the UPS power supply 1 after being fully charged; the alarm dry contact provides a dry contact signal to the UPS power supply 1 when the battery module 4 is empty or the battery pack is in an abnormal state;
the battery management unit 2 is externally provided with an RS485 communication interface and can provide communication externally; can be equipped with the removal and patrol and examine equipment 7, configuration LCD display screen and data storage function, accessible RS485 patrols and examines equipment 7 with the removal and is connected the communication, looks over battery module 4's electric core voltage and temperature state to do data storage, battery management unit 2 is to outer configuration CAN communication interface, as inside debugging communication, CAN connect PC end host computer and carry out data and look over and program upgrade.
The battery management unit 2 is provided with a prompt lamp 6, a green running lamp is normally on in a normal running state, a yellow fault lamp is normally on when a fault occurs, and a red alarm lamp is normally on when a serious fault occurs, so that the running state of the system can be visually displayed.
Based on the above, the utility model discloses the structure adopts the daisy chain mode to link the structure, realizes that battery monitoring unit BMU and battery management unit MCU's annular concatenates the communication. Meanwhile, the self-carried dry contact communication function of the large UPS is utilized, high-voltage and high-power electric devices in a traditional management system are removed, the distributed lithium battery energy storage system framework is simplified, voltage and temperature sampling is carried out in real time through the battery monitoring unit, and the battery balancing function is excellent.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.
Claims (6)
1. The utility model provides a lithium cell energy storage system based on SPI data link communication, its characterized in that, includes UPS power (1), battery management unit (2), battery monitoring unit (3) and battery module (4), battery module (4) are equipped with a plurality of and establish ties together, and every battery module (4) is connected with a battery monitoring unit (3), battery monitoring unit (3) still are connected with battery management unit (2), battery management unit (2) are connected with UPS power (1), and battery management unit (2) still connect warning light (6), UPS power (1) still is connected with battery module (4).
2. The SPI data link communication-based lithium battery energy storage system of claim 1, wherein: isolation SPI communication is adopted between the battery monitoring units (3) and the battery management unit (2) so as to connect the battery monitoring units and the battery management unit in an isolation daisy chain, and redundant communication is carried out through two ends of the daisy chain.
3. The SPI data link communication-based lithium battery energy storage system of claim 1, wherein: the battery module (4) is formed by connecting a plurality of lithium iron phosphate batteries (5) in series.
4. The SPI data link communication-based lithium battery energy storage system of claim 1, wherein: the battery monitoring unit (3) adopts an LTC6811 chip to perform voltage and temperature sampling and balance management on the battery module (4).
5. The SPI data link communication-based lithium battery energy storage system of claim 1, wherein: the battery management unit (2) is also connected with a mobile inspection device (7).
6. The SPI data link communication-based lithium battery energy storage system of claim 1, wherein: the prompting lamp (6) comprises a yellow fault lamp, a red alarm lamp and a green operating lamp.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021207396.4U CN212113841U (en) | 2020-06-28 | 2020-06-28 | Lithium battery energy storage system based on SPI data link communication |
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| CN202021207396.4U CN212113841U (en) | 2020-06-28 | 2020-06-28 | Lithium battery energy storage system based on SPI data link communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113709155A (en) * | 2021-08-27 | 2021-11-26 | 苏州猛禽视觉科技有限公司 | Battery module daisy chain communication conversion method, system and terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113709155A (en) * | 2021-08-27 | 2021-11-26 | 苏州猛禽视觉科技有限公司 | Battery module daisy chain communication conversion method, system and terminal |
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