CN214957032U - Chargeable distributed control battery system - Google Patents
Chargeable distributed control battery system Download PDFInfo
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- CN214957032U CN214957032U CN202121430319.XU CN202121430319U CN214957032U CN 214957032 U CN214957032 U CN 214957032U CN 202121430319 U CN202121430319 U CN 202121430319U CN 214957032 U CN214957032 U CN 214957032U
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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 utility model belongs to the technical field of battery packs, and discloses a rechargeable distributed control battery system, which comprises a battery management system main control unit, a charging and discharging integral interface, a plurality of battery clusters and a plurality of DC-DC bidirectional converter modules; each battery cluster is formed by connecting a plurality of battery modules in series, each battery module is connected with a battery management system slave control unit, each battery module is provided with a DC-DC module, and the DC-DC bidirectional converter module is externally arranged in a vehicle or a charging station by adding the DC-DC module to a single battery module for cluster management. Meanwhile, a battery management system main control unit is arranged for the battery pack to monitor and predict the state of the battery in the battery module in real time, and the battery management system main control unit is used for controlling the on-off of the DC-DC module, so that the switching of a single battery module is independently controlled, the purpose of fine management with higher granularity is achieved, the availability of the battery is improved, and the influence of the inconsistency of the battery in the operation process is reduced.
Description
Technical Field
The utility model belongs to the technical field of the battery package, in particular to chargeable distributed control battery system.
Background
The electric mine card is different from a common passenger vehicle in that the electric quantity is large, generally about 500kWh, similar to the single energy storage scale of a fixed power station, the series-parallel connection mode of a battery is similar to that of an energy storage power station, and the battery is generally connected in parallel after being divided into a plurality of clusters. Meanwhile, serious and inaccurate SOC estimation is easily caused, and endurance anxiety is generated.
Patent CN201721423210.7 discloses a series-parallel battery pack system with limp function, which is to connect multiple groups of battery packs in parallel by using multiple pairs of positive and negative contactors respectively. The advantages are that: the multiple groups of battery packs are adopted to supply power to the whole vehicle, and the risk of anchoring when the power supply of the single group of battery packs fails is reduced. However, in this scheme, when a single battery module fails, the entire battery cluster connected in series needs to be withdrawn, resulting in a large capacity loss. Meanwhile, the phenomenon of circulation among clusters is easily caused because the voltage of the batteries is inconsistent after the batteries are operated for a long time.
Patent CN201910012792.7 discloses a battery pack, a battery pack control system and a control method, where the battery pack includes a plurality of battery cores and a first circuit board, the surface of the first circuit board is provided with a battery core installation socket and an integrated circuit inside the first circuit board, all the battery cores and any other battery core can be connected through the integrated circuit, and a communication circuit between two battery cores is provided with a wireless switch, and the wireless switch is turned on or turned off according to a signal received by the wireless switch, so as to connect the corresponding battery core into a power supply loop. The control nodes of the scheme are too many, each battery cell is a control node, the control difficulty and the fault probability are high, and the overhauling difficulty is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a chargeable distributed control battery system, which solves the problem that the capacity loss is large because the whole battery cluster in series connection needs to be withdrawn when a single battery module breaks down; the phenomenon of short plate effect or battery circulation and the like caused by inconsistent voltage of the battery clusters is solved.
The utility model discloses a realize through following technical scheme:
a rechargeable distributed control battery system comprises a battery management system main control unit, a charging and discharging integral interface, a plurality of battery clusters and a plurality of DC-DC bidirectional converter modules;
each battery cluster is formed by connecting a plurality of battery modules in series, each battery module is connected with a battery management system slave control unit, and each battery module is provided with a DC-DC module;
each battery management system slave control unit is connected with the battery management system master control unit and is used for summarizing battery data information acquired by the battery management system slave control units to the battery management system master control unit;
each DC-DC module is connected with a battery management system main control unit, and the battery management system main control unit is used for controlling the switching of the DC-DC modules and carrying out switching control on the battery modules;
the battery management system main control unit is connected with the charging and discharging integral interface;
and each battery cluster is correspondingly connected with one DC-DC bidirectional converter module, and each DC-DC bidirectional converter module is connected with the charging and discharging integral interface.
Furthermore, a communication interface is arranged outside each battery cluster, and the battery clusters are communicated with the DC-DC bidirectional converter module through the communication interfaces.
Furthermore, the battery management system slave control unit communicates with the battery management system master control unit in a CAN communication mode.
Further, the DC-DC bidirectional converter module is fixed in the vehicle body or in the charging station.
Further, the whole interface of charging and discharging is arranged in the charging station or the vehicle body.
Further, each battery cluster is formed by connecting more than 2 battery modules in series.
Further, the number of the battery clusters is 2 or more.
Further, the battery data information includes current, voltage, and temperature.
Further, the power of the DC-DC module is 10-30 kw.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a chargeable distributed control battery system, which comprises a battery management system main control unit, a charging and discharging integral interface, a plurality of battery clusters and a plurality of DC-DC bidirectional converter modules; each battery cluster is formed by connecting a plurality of battery modules in series, each battery module is connected with a battery management system slave control unit, each battery module is provided with a DC-DC module, the DC-DC modules are added to the single battery module for cluster management, and when the battery management system slave control unit is in specific operation, battery data information collected by the battery management system slave control units of all the battery modules in different battery clusters is collected to a battery management system master control unit, and the battery management system master control unit is connected with a charging and discharging integral interface for communication; the battery management system main control unit is internally integrated with a plurality of battery analysis and diagnosis algorithms, and can analyze and calculate the consistency of the batteries, the abnormal parameter trend and the internal short circuit risk. The battery management system main control unit is communicated with the DC-DC module, and controls the switching of the battery module by controlling the switching of the DC-DC module; when a certain battery module breaks down, the main control of the battery management system sends a short-circuit instruction to a DC-DC module configured outside the battery module, and the battery module is withdrawn. Meanwhile, if a certain battery module is charged or discharged preferentially, the battery module can be withdrawn through the DC-DC module, and other battery modules can be discharged or charged continuously, so that full charge and discharge of all battery electric quantities in the battery cluster are realized, and the charge and discharge electric quantity and efficiency of the system are improved. The DC-DC bidirectional converter module is fixed in a vehicle or a charging station and is physically separated from the battery pack, so that decoupling and independent control between the battery clusters are realized, and the phenomena of short plate effect or battery circulation and the like caused by inconsistent voltage of the battery clusters are avoided. Among traditional energy storage system, electric core may have 6/700, and every electric core is a control node, and the node is too many, consequently the utility model discloses a module is controlled as the minimum unit, and design like this, the battery module is only tens probably, and the control degree of difficulty reduces, overhauls the degree of difficulty and also can reduce.
Drawings
Fig. 1 is a schematic diagram of a connection structure of a rechargeable distributed control battery system according to the present invention.
The system comprises a battery management system, a battery module, a DC-DC module, a battery management system main control unit, a charging and discharging integrated interface, a communication interface, a DC-DC bidirectional converter module and a power supply module, wherein the battery management system main control unit is 1, the battery module is 2, the DC-DC module is 3, the battery management system main control unit is 4, the charging and discharging integrated interface is 5, the communication interface is 6, and the DC-DC bidirectional converter module is 7.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
As shown in fig. 1, the utility model discloses a chargeable distributed control battery system, including battery management system main control unit 4, the whole interface 5 of charge-discharge, a plurality of battery cluster and a plurality of DC-DC bidirectional converter module 7.
The number of the battery clusters is preferably 2 or more. The battery cluster is formed by connecting a plurality of battery modules 2 in series, each battery module 2 is connected with a battery management system slave control unit 1, and the number of slave control paths is determined according to the number of the battery cores in the battery modules 2 in series and parallel;
the information of all the battery management systems of different battery clusters is summarized to a battery management system main control unit 4 in a CAN communication mode from the control unit 1, and the battery management system main control unit 4 is connected with a charging and discharging integral interface 5 for communication.
The external of each battery module 2 is provided with a DC-DC module 3, the DC-DC module 3 is connected with a battery management system main control unit 4, and the battery management system main control unit 4 controls the switching of the battery modules 2 by controlling the switching of the DC-DC module 3.
The power of the DC-DC module 3 is relatively small, typically 10-30 kw.
Specifically, the battery management system main control unit 4 integrates various battery analysis and diagnosis algorithms, and can analyze and calculate battery consistency, parameter trend abnormity, internal short circuit risk and the like. When the battery management system main control unit 4 finds that a certain battery module 2 has a fault, the battery management system main control unit 4 sends a short-circuit instruction to the DC-DC module 3 configured outside the battery module 2, and the battery module 2 is withdrawn.
If a certain battery module 2 is charged preferentially or discharged completely, the battery module 2 can be withdrawn through the DC-DC module 3, and other battery modules 2 can continue to be discharged or charged, so that full charge and discharge of all battery electric quantities in a battery cluster are realized, and the charge and discharge electric quantity and efficiency of the system are improved.
Specifically, each battery cluster corresponds to one external communication interface 6, and the two external communication interfaces correspond to one another. Each communication interface 6 is in turn connected to a DC-DC bidirectional converter module 7. The DC-DC bidirectional converter module 7 is fixed in the vehicle or charging station, physically separated from the battery pack. The charging and discharging integral interface 5 is connected with the DC-DC bidirectional converter module 7, and the charging and discharging integral interface 5 can adopt a charging station interface or a vehicle control unit interface.
The battery pack has a bidirectional voltage lifting function due to the adoption of the DC-DC bidirectional converter module 7, and the discharge voltage of the battery pack cannot be influenced due to inconsistent voltage of the battery pack, so that complete decoupling and fine management of the battery pack and the battery module 2 are realized.
The working method of the rechargeable distributed control battery system comprises the following processes:
the battery management system collects battery data information in all the battery modules 2 to a battery management system main control unit 4 from a control unit 1, and the battery management system main control unit 4 analyzes and calculates battery consistency, parameter trend abnormity, internal short circuit risk and the like to obtain the running state of the battery modules 2;
when the battery management system main control unit 4 monitors that a certain battery module 2 has a fault, the battery management system main control unit 4 sends a short-circuit instruction to the DC-DC module 3 configured for the battery module 2, and the battery module 2 is withdrawn;
when the battery management system main control unit 4 monitors that the priority charging or discharging of a certain battery module 2 is completed, the battery management system main control unit 4 withdraws the battery module 2 through the DC-DC module 3, so that other battery modules 2 continue to discharge or charge, and full charging of all battery electric quantities in the battery cluster is realized.
In the embodiments provided in the present application, the disclosed technical content mainly refers to a battery module structure of a battery energy storage system, which does not include other assemblies and management control units in the battery energy storage system, a fire protection system, an air conditioning system, etc., and it should be understood that all battery energy storage systems based on the structure are included in the scope of the present invention.
In the embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (9)
1. A rechargeable distributed control battery system is characterized by comprising a battery management system main control unit (4), a charging and discharging integral interface (5), a plurality of battery clusters and a plurality of DC-DC bidirectional converter modules (7);
each battery cluster is formed by connecting a plurality of battery modules (2) in series, each battery module (2) is connected with a battery management system slave control unit (1), and each battery module (2) is provided with a DC-DC module (3);
each battery management system slave control unit (1) is connected with the battery management system master control unit (4) and is used for summarizing battery data information acquired by the battery management system slave control units (1) to the battery management system master control unit (4);
each DC-DC module (3) is connected with a battery management system main control unit (4), and the battery management system main control unit (4) is used for controlling the switching of the DC-DC modules (3) and carrying out switching control on the battery modules (2);
the battery management system main control unit (4) is connected with the charging and discharging integral interface (5);
each battery cluster is correspondingly connected with one DC-DC bidirectional converter module (7), and each DC-DC bidirectional converter module (7) is connected with the charging and discharging integral interface (5).
2. A rechargeable decentralized control battery system according to claim 1, characterized in that a communication interface (6) is provided outside each battery cluster, and the battery clusters communicate with the DC-DC bidirectional converter module (7) through the communication interface (6).
3. The rechargeable decentralized control battery system according to claim 1, characterized in that the battery management system slave control unit (1) communicates with the battery management system master control unit (4) by means of CAN communication.
4. A rechargeable decentralized control battery system according to claim 1, characterized in that the DC-DC bidirectional converter module (7) is fixed in the vehicle body or in the charging station.
5. A rechargeable decentralized control battery system according to claim 1, characterized in that the integrated interface (5) for charging and discharging is provided in the charging station or in the vehicle body.
6. A rechargeable decentralized control battery system according to claim 1, characterized in that each battery cluster is composed of more than 2 battery modules (2) connected in series.
7. The system of claim 1, wherein the number of battery clusters is greater than 2.
8. The rechargeable decentralized control battery system according to claim 1, wherein the battery data information includes current, voltage and temperature.
9. A rechargeable decentralized control battery system according to claim 1, characterized in that the power of the DC-DC module (3) is 10-30 kw.
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| CN202121430319.XU CN214957032U (en) | 2021-06-25 | 2021-06-25 | Chargeable distributed control battery system |
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| CN202121430319.XU CN214957032U (en) | 2021-06-25 | 2021-06-25 | Chargeable distributed control battery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116053618A (en) * | 2022-12-30 | 2023-05-02 | 蜂巢能源科技(无锡)有限公司 | Energy storage management system, control method and battery energy storage device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116053618A (en) * | 2022-12-30 | 2023-05-02 | 蜂巢能源科技(无锡)有限公司 | Energy storage management system, control method and battery energy storage device |
| CN116053618B (en) * | 2022-12-30 | 2023-12-05 | 蜂巢能源科技(无锡)有限公司 | Energy storage management system, control method and battery energy storage device |
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Effective date of registration: 20220414 Address after: 102209 building a, Huaneng talent innovation and entrepreneurship base, South District of future science city, Beiqijia Town, Changping District, Beijing Patentee after: Huaqing chuchuang Technology Co.,Ltd. Address before: 102209 building a, Huaneng talent innovation and entrepreneurship base, future science and Technology City, Beiqijia Town, Changping District, Beijing Patentee before: HUANENG CLEAN ENERGY Research Institute |