CN111129619A - Power battery cluster management system - Google Patents
Power battery cluster management system Download PDFInfo
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- CN111129619A CN111129619A CN201911369530.2A CN201911369530A CN111129619A CN 111129619 A CN111129619 A CN 111129619A CN 201911369530 A CN201911369530 A CN 201911369530A CN 111129619 A CN111129619 A CN 111129619A
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- battery cluster
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a power battery cluster management system, which comprises a DC/DC conversion unit, a pre-charging unit, a high-voltage relay, a fuse, a battery cluster management unit and the like; the topology of the DC/DC conversion unit adopts a multiple Buck-Boost circuit based on a power device; the pre-charging unit consists of a pre-charging relay, a pre-charging resistor and an anti-parallel diode of the power device; the high-voltage relay is connected in parallel at two ends of the pre-charging relay and the pre-charging resistor; the fuse is connected in series behind the high-voltage relay and the pre-charging resistor; the battery cluster management unit comprises a central processing unit, an AD conversion module, an insulation detection module, a communication interface, an optical coupling isolation module, a relay output module and a power module driving unit. The invention can realize flexible operation of the battery clusters, and the battery clusters with different types, different capacities and different voltages can be randomly combined and connected in parallel, thereby facilitating the management and maintenance of the battery clusters. And performing all-around charge/discharge management, state monitoring, performance evaluation and safety protection on the battery cluster.
Description
Technical Field
The invention belongs to the technical field of power battery management, and particularly relates to a power battery cluster management system.
Background
Because factors such as environmental protection, energy crisis, the field that adopts power battery power supply is more and more, also more and more to high-power battery system demand, adopt multichannel battery cluster to connect in parallel to increase power at present often, the parallel connection mode has two kinds:
one is that the battery clusters are directly connected in parallel. The mode has higher requirement on the consistency of each path of battery cluster, and meanwhile, circulation current is easy to occur among the battery clusters, so that the attenuation of partial batteries is aggravated after long-term use, and the service life of the battery clusters is influenced.
One is that the battery clusters are connected in parallel by a DC/DC converter arrangement. The types, capacities and the like of all the battery clusters can be different, but the battery clusters and the DC/DC converter are respectively provided with a management control unit which is communicated with different devices of the whole electrical system, and direct contact is lacked, so that waste of electrical resources is caused, and the safe use of the battery clusters is influenced.
Disclosure of Invention
In order to solve the problem of parallel connection of the existing high-power battery clusters, the invention provides a power battery cluster management system, wherein a DC/DC conversion unit is integrated into a battery cluster management unit so as to reduce public resources, reduce the cost and improve the management level of the battery clusters.
The technical scheme adopted by the invention for solving the technical problems is as follows: a power battery cluster management system comprises a main loop, a secondary loop and a secondary loop, wherein the main loop comprises a DC/DC conversion unit, a pre-charging unit, a high-voltage relay, a fuse, a battery cluster management unit and the like, and all aspects of charging/discharging management, state monitoring, performance evaluation and various protections of a battery cluster are realized; the DC/DC conversion unit topology adopts a multiple Buck-Boost circuit based on power devices, realizes the functions of charging and discharging a battery cluster according to the instruction of a battery cluster management unit, ensures that the voltage and the current of the battery cluster are in safe regions, and consists of a load-side support capacitor, a current sensor, a filter reactor, a filter capacitor and a plurality of power devices, wherein the power devices can be IGBT modules, MOSFET modules or SiC power devices with anti-parallel diodes; the pre-charging unit is a pre-charging circuit consisting of a pre-charging relay, a pre-charging resistor and an anti-parallel diode of a power device, and is mainly used for pre-charging a support capacitor and a filter capacitor, and closing the high-voltage relay and opening the pre-charging relay when the voltage of the battery cluster is reached; the high-voltage relay is connected in parallel at two ends of a branch circuit formed by the pre-charging relay and the pre-charging resistor, and mainly realizes the connection and disconnection of the high-voltage main loop; the fuse is connected in series behind the high-voltage relay and the pre-charging resistor and mainly used for short-circuit protection of the battery cluster; the battery cluster management unit comprises a central processing unit, an AD conversion module and an insulation detection module which are respectively connected with the central processing unit and is used for monitoring electrical parameters such as voltage, current, temperature, insulation and the like; the communication interface is connected with the central processing unit and is used for collecting the information of the single batteries, receiving the instruction of an external controller and uploading the state of the battery cluster; the device also comprises an optical coupling isolation module and a relay output module which are connected with the central processing unit and are respectively used as a digital input port and a digital output port to control the pre-charging relay, the high-voltage relay and the acousto-optic reminding module; the power module driving unit is connected with the central processing unit and is used for driving the DC/DC conversion unit to realize the functions of charging and discharging control and voltage regulation of the battery cluster; the battery cluster management unit estimates the service life, the residual capacity and the like of the battery cluster according to the state of the battery cluster, and simultaneously disconnects a main loop and gives an audible and visual alarm when the battery cluster state fails, so that the safety of the battery cluster is protected.
According to the power battery cluster management system, a Buck-Boost circuit is a multiple non-isolated topological structure formed by bridging a plurality of power devices, and is specifically determined according to the working current of a battery cluster; the triple non-isolated topology structure is formed by bridging six power devices, and the double non-isolated topology structure is formed by bridging four power devices.
The battery cluster management unit of the power battery cluster management system further comprises a power chip and an information storage module which are connected with the central processing unit.
Compared with the existing battery cluster management system, the invention has the main characteristics that:
1, main loops of the battery clusters are different: because the DC/DC conversion unit is integrated, the voltage regulation of the battery cluster can be realized, and the battery cluster can be conveniently connected with other battery clusters in parallel, even if the types, the capacities and the voltages of the batteries of the other battery clusters are different;
2, the battery cluster management units are different: the battery cluster management unit has a DC/DC conversion control function, can automatically control the DC/DC conversion unit to work, and ensures the service life of the battery cluster because the working voltage, the current and the like of the battery cluster management unit are in a safe working area of the battery cluster;
3, by adopting a novel power battery cluster management technology and a high-performance DC/DC conversion technology, the battery clusters with different types, different capacities and different voltages can be combined and connected in parallel at will to form a high-power battery power system, and the internal current circulation between the battery clusters cannot be generated, the problem of battery consistency cannot be aggravated, and the like;
and 4, when multiple paths of battery clusters are connected in parallel, each path of battery cluster can be independently managed without being influenced by other paths, and when one path of battery cluster is abnormal, the management system can automatically disconnect the battery cluster, so that uninterrupted maintenance is realized on the whole battery system.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the main circuit of the present invention;
fig. 3 is a schematic structural diagram of a battery cluster management unit according to the present invention.
The figures are numbered: 1-supporting capacitor, 2-power device, 3-current sensor, 4-filter reactor, 5-filter capacitor, 6-pre-charging relay, 7-high-voltage relay, 8-pre-charging resistor and 9-fuse.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a power battery cluster management system, which is used for state monitoring, charging/discharging management, performance evaluation, safety protection and the like of a battery cluster, is suitable for a new energy power system, and can be used in the fields of power supply of high-power batteries of new energy automobiles, ships and the like.
As shown in fig. 1, as a specific embodiment, the schematic diagram of a power battery cluster management system suitable for a new energy ship provided by the present invention includes: the battery pack management system comprises a DC/DC conversion unit, a pre-charging unit, a high-voltage relay 7, a fuse 9 and a battery pack management unit, and achieves all-round charging/discharging management, state monitoring, performance evaluation and various protections of the battery pack.
The main loop of the battery cluster management system is shown in fig. 2, and the schematic diagram of the battery cluster management unit is shown in fig. 3.
In order to reduce ripple current, the topology of the DC/DC conversion unit adopts a multiple non-isolated type Buck-Boost circuit topology based on the power device 2, and a multiple non-isolated type topology structure formed by bridging a plurality of power devices 2 is specifically determined according to the working current of the battery cluster: the triple non-isolated topological structure is formed by bridging six power devices 2, the double non-isolated topological structure is formed by bridging four power devices 2, the DC/DC conversion unit is composed of a supporting capacitor 1, a current sensor 3, a filter reactor 4, a filter capacitor 5 and a plurality of power devices 2, the charging and discharging functions of the battery cluster are realized according to the instruction of the battery cluster management unit, and the voltage and the current of the battery cluster are ensured to be in a safe region; the pre-charging unit is mainly used for pre-charging the capacitor of the DC/DC conversion unit, a pre-charging circuit consisting of a pre-charging relay 6, a pre-charging resistor 8 and a diode inside the power device 2 charges the main loop supporting capacitor 1 and the filter capacitor 5, and when the voltage of the battery cluster is reached, the high-voltage relay 7 is closed and the pre-charging relay 6 is disconnected; two ends of a branch circuit formed by the pre-charging relay 6 and the pre-charging resistor 8 are connected with a high-voltage relay 7 in parallel, so that the connection and disconnection of a high-voltage main loop are mainly realized; the fuse 9 primarily provides short circuit protection for the battery cluster.
The Buck-Boost circuit is a multiple non-isolated topological structure formed by bridging a plurality of power devices 2 and is specifically determined according to the working current of a battery cluster; the triple non-isolated topology structure is formed by bridging six power devices 2, and the double non-isolated topology structure is formed by bridging four power devices 2.
As shown in fig. 3, the battery cluster management unit includes a central processing unit, and a power chip, an audio-visual reminding module, an information storage module, a communication interface (CAN/RS 485/ethernet), a driving module, an insulation detection module, an AD conversion module, an optical coupling isolation module, a relay output module, etc. which are respectively connected to the central processing unit, and the AD conversion module and the insulation detection module mainly implement monitoring of electrical parameters such as voltage, current, temperature, insulation, etc.; collecting single battery information through a communication interface, receiving an external controller instruction and uploading a battery cluster state; the optical coupling isolation module and the relay output module are respectively used as a digital input port and a digital output port to control the pre-charging relay 6, the high-voltage relay 7 and the acousto-optic reminding module; the DC/DC conversion unit is driven by the power module driving unit, so that the charging and discharging control and voltage regulation functions of the battery cluster are realized; the central processing unit estimates the service life, the residual capacity and the like of the battery cluster according to the state of the battery cluster, and simultaneously disconnects the main loop and gives an audible and visual alarm according to the state of the battery cluster when a fault occurs, so that the safety of the battery cluster is protected.
Because each battery cluster has an independent management unit and a voltage regulation function, the multiple battery clusters can be directly connected in parallel to form a battery system with higher power, and the battery system is not influenced by the model, the capacity and the voltage and only needs to set respective protection parameters reasonably.
The power battery cluster management system provided by the invention adopts an independent power battery cluster management technology and a high-performance electric energy conversion technology, can realize that battery clusters with different types, different capacities and different voltages can be randomly combined and connected in parallel to form a high-power battery system, has the advantages that the battery clusters operate in a safe area, no internal current circulation exists among the clusters, and the like, and is suitable for various power battery systems needing to be connected in parallel, such as lithium batteries, lead-acid batteries, and the like.
Specifically, the management system of the present patent has the following functions:
(1) and detecting battery parameters. The method comprises the steps of detecting the total voltage, the total current and the ambient temperature, detecting insulation, and collecting the voltage and the temperature of each single battery of the battery cluster through communication.
(2) And estimating the state of the battery. Including but not limited to remaining battery charge (SOC), state of health (SOH), etc.
(3) Has the function of charge and discharge management. The DC/DC conversion unit can be controlled to safely charge and discharge the battery cluster according to the characteristics, the temperature and the related instructions of the battery cluster.
(4) And communicating with an external controller. And receiving an external controller instruction, and uploading the battery cluster parameters and states.
(5) When the abnormality occurs, such as overvoltage, undervoltage, overcurrent, overtemperature, too low battery insulation, high-voltage relay fault, communication fault and the like of the battery cluster, the DC/DC conversion unit stops working, and the high-voltage relays of the positive electrode and the negative electrode are switched off simultaneously, so that the disconnection of the battery cluster is completed.
The invention can realize flexible operation of the battery clusters, and the battery clusters with different types, different capacities and different voltages can be randomly combined and connected in parallel, thereby facilitating the management and maintenance of the battery clusters. And performing all-around charge/discharge management, state monitoring, performance evaluation and safety protection on the battery cluster.
Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A power battery cluster management system is characterized in that: the device comprises a DC/DC conversion unit, a pre-charging unit, a high-voltage relay (7), a fuse (9) and a battery cluster management unit;
the DC/DC conversion unit adopts a multiple Buck-Boost circuit to realize charging and discharging of a battery cluster and ensure that the voltage and the current of the battery cluster are in safe regions, and is composed of a support capacitor (1), a current sensor (3), a filter reactor (4), a filter capacitor (5) and a plurality of power devices (2), wherein the power devices (2) are IGBT modules, MOSFET modules or SiC power devices;
the pre-charging unit consists of a pre-charging relay (6), a pre-charging resistor (8) and an anti-parallel diode of the power device (2), so that pre-charging of the support capacitor (1) and the filter capacitor (5) is realized, and the high-voltage relay (7) is closed and the pre-charging relay (6) is opened when the voltage of the battery cluster is reached;
the high-voltage relay (7) is connected in parallel at two ends of a branch circuit formed by the pre-charging relay (6) and the pre-charging resistor (8) to realize the connection and disconnection of a high-voltage main loop;
the fuse (9) is connected in series behind the high-voltage relay (7) and the pre-charging resistor (8) to perform short-circuit protection on the battery cluster;
the battery cluster management unit comprises a central processing unit, an AD conversion module and an insulation detection module which are respectively connected with the central processing unit and are used for monitoring voltage, current, temperature and insulation; the communication interface is connected with the central processing unit and is used for collecting the information of the single batteries, receiving the instruction of an external controller and uploading the state of the battery cluster; the device also comprises an optical coupling isolation module and a relay output module which are connected with the central processing unit and are used for controlling the pre-charging relay (6) and the high-voltage relay (7); the power module driving unit is connected with the central processing unit and used for driving the DC/DC conversion unit to realize charging and discharging control and voltage regulation of the battery cluster.
2. The power battery cluster management system according to claim 1, wherein the Buck-Boost circuit is a triple non-isolated topology structure formed by bridging six power devices (2).
3. The power battery cluster management system according to claim 1, wherein the Buck-Boost circuit is a double non-isolated topology structure formed by bridging four power devices (2).
4. A power battery cluster management system according to claim 1, 2 or 3, wherein the battery cluster management unit further comprises a power chip and an information storage module connected to the central processing unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911369530.2A CN111129619A (en) | 2019-12-26 | 2019-12-26 | Power battery cluster management system |
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| CN201911369530.2A CN111129619A (en) | 2019-12-26 | 2019-12-26 | Power battery cluster management system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112332483A (en) * | 2020-10-26 | 2021-02-05 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Energy management control method of series lithium battery pack |
| CN112332481A (en) * | 2020-10-26 | 2021-02-05 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Current equalizing method of multi-battery pack parallel system |
| CN113479115A (en) * | 2021-07-01 | 2021-10-08 | 上海中科深江电动车辆有限公司 | System for realizing dual-power automatic balance fusion of range-extended vehicle |
| CN113595180A (en) * | 2021-07-16 | 2021-11-02 | 风帆有限责任公司 | Power battery device |
| CN115148709A (en) * | 2022-06-28 | 2022-10-04 | 爱微(江苏)电力电子有限公司 | Power module for electronic initial charging of battery pack and method for manufacturing same |
| CN116599180A (en) * | 2023-05-26 | 2023-08-15 | 上海采日能源科技有限公司 | Household energy storage system and control method thereof |
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| CN116599180A (en) * | 2023-05-26 | 2023-08-15 | 上海采日能源科技有限公司 | Household energy storage system and control method thereof |
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