CN115548480B - Battery system and control method of battery system - Google Patents
Battery system and control method of battery system Download PDFInfo
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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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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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
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- 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
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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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- Chemical & Material Sciences (AREA)
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
The embodiment of the application discloses a battery system and a control method of the battery system, wherein the battery system comprises a battery management system BMS and at least one battery module; the battery management system BMS comprises an electric quantity detection unit and a risk detection unit; the battery management system BMS is used for acquiring the battery capacity of the battery module through the electric quantity detection unit and acquiring the health state of the battery module based on the battery capacity and historical battery capacity information generated by the battery module in a preset time period; the battery management system BMS is also used for acquiring the risk state of the battery module through the risk detection unit; and the battery management system BMS is also used for generating an operation score of the battery module according to the health state and the risk state and controlling the battery module by using the operation score. By implementing the method and the device, the safety of the battery system can be improved.
Description
Technical Field
The present application relates to the field of energy storage technologies, and in particular, to a battery system and a control method of the battery system.
Background
The battery system (also referred to as a battery energy storage system or an energy storage system) formed by the battery cells (e.g., lithium ion batteries) in series and parallel is widely applied to various scenes requiring the battery energy storage system to provide power, such as electric vehicles, base station energy storage, data center power backup, and the like. Under the circumstances such as overcharge, too high temperature, interior short circuit, the thermal runaway probably takes place for electric core monomer, takes place the burning promptly, and at this moment, the burning of electric core monomer can release a large amount of heats, if not in time handle or handle improperly, can arouse whole battery system to fire the burning, probably cause the explosion even to cause the loss of life and property easily.
The inventor finds in research that the existing control mode for the battery system cannot manage the battery system well, resulting in poor safety of the battery system.
Disclosure of Invention
The embodiment of the application provides a battery system and a control method of the battery system, which can improve the safety of the battery system.
In a first aspect, an embodiment of the present application provides a battery system, which includes a battery management system BMS, at least one battery module; the battery management system BMS comprises an electric quantity detection unit and a risk detection unit;
the battery management system BMS is used for acquiring the battery capacity of the battery module through the electric quantity detection unit and acquiring the health state of the battery module based on the battery capacity and the use information generated by the battery module in a preset time period;
the battery management system BMS is also used for acquiring the risk state of the battery module through the risk detection unit;
and the battery management system BMS is also used for generating an operation score of the battery module according to the health state and the risk state and controlling the battery module by using the operation score.
Specifically, obtaining the state of health of the battery module based on the battery capacity obtained in real time and the historical battery capacity information generated by the battery module within the preset time period includes: when the battery capacity acquired in real time is between the historical maximum battery capacity and the historical minimum battery capacity of the battery module, the health state of the battery module is good; the battery capacity acquired in real time is less than the historical minimum battery capacity, which indicates that the state of health of the battery module is poor. For the battery management system, the operation scores of the battery modules can be generated based on the health states and the risk states of the battery modules, so that the battery modules can be controlled by the operation scores. Compared with the existing manual mode, the safety of the battery system can be improved.
In one embodiment, the battery management system BMS further includes a charge and discharge control unit that controls the battery module using the motion score, including:
and interrupting the charging and discharging process of the battery module through the charging and discharging control unit under the condition that the motion score is smaller than a first preset threshold value.
In one embodiment, the controlling the battery module by using the motion score further includes:
under the condition that the motion score is larger than the first preset threshold value, the electric quantity detection unit detects whether the battery voltage of the battery module is smaller than a preset voltage threshold value, and the battery module is charged under the condition that the battery voltage of the battery module is smaller than the preset voltage threshold value.
In one embodiment, the battery management system BMS further includes a fire extinguishing unit controlling the battery module using the motion score, including:
under the condition that the motion score is smaller than a second preset threshold value, fire extinguishing agents are sprayed to the battery module through the fire extinguishing unit; wherein the second preset threshold is lower than the first preset threshold.
In one embodiment, the risk state of the battery module includes one of a thermal runaway state of the battery module, a combustion state of the battery module, and an open state of a safety valve of the battery module.
In a second aspect, the present application provides a control method for a battery system, where the method is applied to the battery system, and the battery system includes a battery management system BMS, at least one battery module; the battery management system BMS comprises an electric quantity detection unit and a risk detection unit; the method comprises the following steps:
the battery management system BMS acquires the battery capacity of the battery module through the electric quantity detection unit, and acquires the health state of the battery module based on the battery capacity and historical battery capacity information generated by the battery module in a preset time period;
the battery management system BMS acquires the risk state of the battery module through the risk detection unit;
and the battery management system BMS generates an operation score of the battery module according to the health state and the risk state, and controls the battery module by using the operation score.
In a third aspect, an embodiment of the present application provides a cabinet, where the cabinet includes the battery system described in the first aspect.
In a fourth aspect, embodiments of the present application provide an electronic device, including one or more processors; a storage device, on which one or more programs are stored, which when executed by one or more processors cause the one or more processors to implement the method described in any implementation of the second aspect.
In a fifth aspect, the present application provides a computer-readable storage medium storing a computer program, the computer program comprising program instructions that, when executed by a processor, cause the processor to perform the method of the second aspect.
In a sixth aspect, the present application further provides a computer program, where the computer program includes program instructions, and the program instructions, when executed by a processor, cause the processor to execute the method of the second aspect.
The above embodiments of the present disclosure have the following advantages: through the battery system and the control method of the battery system of some embodiments of the disclosure, the safety of the circuit where the battery module is located is improved. Specifically, the reason why the safety of the circuit in which the battery module is located is low is that: because the staff regularly examines the region in battery module place, the staff can only change the battery of the inside exception of battery module (for example, the battery damages, can't carry out charge-discharge) in interval a period in the region, greatly reduced battery system's security. Based on this, the battery system and the control method of the battery system of some embodiments of the present disclosure obtain the battery capacity of the battery module in real time through the electric quantity detection unit, and compare the battery capacity obtained in real time with the historical battery capacity, thereby obtaining the health state of the battery module based on the comparison result. Meanwhile, the risk state of the battery module is acquired through the risk detection unit, then, the operation score of the battery module is generated based on the health state and the risk state, and the battery module is controlled by the operation score. In this way, the safety of the battery system can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below.
Fig. 1 is a scene schematic diagram of thermal runaway combustion of a cell unit according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a battery system according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of another battery system provided in an embodiment of the present application;
fig. 4 is a schematic flow chart of a fire extinguishing method for a battery system according to an embodiment of the present application;
fig. 5 is a schematic block diagram of a battery management system BMS provided by the present application;
fig. 6 is a schematic view of a cabinet provided in an embodiment of the present application;
fig. 7 is a schematic view of an electronic device according to an embodiment of the present application.
Detailed Description
The embodiments of the present application will be described below with reference to the drawings.
The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).
In order to facilitate better understanding of the technical solutions described in the present application, technical terms related to the embodiments of the present application are explained below:
(1) Thermal runaway
In the embodiment of the present application, the whole process of thermal runaway can be divided into the following processes:
the thermal runaway heat accumulation of the battery → the gas generated by the thermal reaction of the battery → the thermal accumulation of the battery is aggravated, the safety valve of the battery is broken → the inflammable and explosive gas in the battery leaks out → the internal heat accumulation of the battery is sprayed out, the spark is sprayed out → the internal heat accumulation of the battery is sprayed out, the external inflammable and explosive gas explodes → the battery continuously burns to spray smoke. It should be noted that the thermal runaway phenomenon may rapidly spread, so that the battery may burn. The phases of the overall process of thermal runaway involved here are of short duration.
In the battery system, a thermal runaway combustion scenario of the cell unit may be as shown in fig. 1. In fig. 1, a plurality of battery cells (i.e., battery cells) are included in a battery system. The battery core 6 is in a thermal runaway state, releases combustible gas, smoke and the like, the combustible gas fills the whole battery system shell and is mixed with air, and if the combustible gas is not processed in time, the whole battery system can be ignited and burnt or even explode. It should be noted that the number of the battery cells included in the battery system shown in fig. 1 is only an example and should not be construed as a limitation.
Next, the structure of the battery system according to the embodiment of the present application will be described.
In this application embodiment, battery system includes a plurality of electric core monomers (be electric core, battery), constitutes a battery module by a plurality of electric core monomers, and a battery package (pack) can be constituteed to a plurality of battery modules, and battery system is constituteed to a plurality of battery packages. Each battery module has a battery module housing, each battery pack has a battery pack housing, and the battery system has a battery system housing.
It should be noted that, in some implementations, the battery modules in the battery system may not constitute a battery pack, and the battery system may include one or more battery modules.
In this application embodiment, consider the easy to assemble replacement of battery in the battery system to and guarantee that output voltage can satisfy consumer's needs, generally establish ties or parallelly connected a plurality of electric core monomers, the hookup constitutes the battery module, later, says that the battery module establishes ties or parallelly connected again, couples into the battery package. By this implementation, the output voltage of the battery system can be guaranteed to be in the range of 4-1000V, and is not limited to this voltage range.
Fig. 2 is a schematic structural diagram of a battery system according to an embodiment of the present disclosure. As shown in fig. 2, the battery management system includes at least one battery module 201, and a battery management system BMS202. The battery module 201 may include a plurality of battery cells 2011; the battery management system BMS202 may include a power amount detection unit 2021 and a risk detection unit 2022 therein. One or more electric quantity detection units 2021 and one or more risk detection units 2022 may be disposed above the plurality of battery cells 2011. The electric quantity detection unit 2021 is used for acquiring the battery capacity of the battery module; acquiring the health state of the battery module on the basis of the battery capacity and historical battery capacity information generated by the battery module in a preset time period; for example, acquiring the state of health of the battery module based on the battery capacity acquired in real time and the historical battery capacity information generated by the battery module within the preset time period includes: when the battery capacity acquired in real time is between the historical maximum battery capacity and the historical minimum battery capacity of the battery module, the health state of the battery module is good; the battery capacity acquired in real time is less than the historical minimum battery capacity, which indicates that the state of health of the battery module is poor. The risk detection unit 2022 is configured to detect data of the battery module, for example, the data may include voltage, current, operating temperature information, concentration of released flammable gas, released smoke, and the like. For example, the risk detection unit 2022 may include at least one of a temperature sensor, a gas sensor, and a smoke sensor. Wherein, temperature sensor for detect the temperature of battery module. For example, the temperature sensor may detect the temperature of the battery module in real time. And the gas sensor is used for detecting the concentration of the flammable and explosive gas released by the battery module. And the smoke sensor is used for detecting the smoke value released by the battery module. In the embodiment of the present application, when the safety valve of the battery is in an open state, or the battery is in a thermal runaway state, the battery module releases gas, which generally includes hydrogen, methane, ethane, acetylene, ethylene, carbon dioxide, carbon monoxide, and the like.
In the present embodiment, the combustible gas is a readily combustible or explosive gas released from the battery, for example, one or more of hydrogen, methane, ethane, acetylene, ethylene, and carbon monoxide.
In the embodiment of the present application, the gas sensor may be a single sensor or a group of gas sensors. In one example, when the gas sensor is a gas sensor group, the gas sensor group uses one or more of a hydrogen sensor, a methane sensor, an ethane sensor, an acetylene sensor, an ethylene sensor, and a carbon monoxide sensor to form a flammable and explosive gas sensor so as to detect flammable and explosive gases.
In this application embodiment, can be through the flammable and explosive gas that gas sensor monitoring battery released, this implementation can make the early warning time of condition of a fire earlier, can have more abundant processing time. In the prior art, taking the thermal runaway of the battery as an example, the step of generating the thermal runaway of the battery may include: 1, thermal runaway heat accumulation of the battery → 2, gas generated by thermal reaction of the battery → 3, aggravation of heat accumulation of the battery, rupture of a safety valve of the battery → leakage of flammable and explosive gas in the battery 4 → 5, external flaming of heat accumulation in the battery → 6, external flaming of heat accumulation in the battery, explosion of external flammable and explosive gas → 7, continuous combustion of the battery and smoke ejection. The combustible and explosive gas sensor is adopted, so that the early warning time can be advanced from the 7 th step to the 4 th step, and the early warning time of the fire can be earlier. The realization mode can prolong the early warning time, can grasp the optimal fire extinguishing time in the initial combustion stage, and greatly reduces the probability of system fire.
In this embodiment of the application, the implementation process of the risk detection unit 2022 for acquiring the risk state of the battery module may include the following cases:
when the concentration value of the combustible gas released by the battery module is detected to be greater than the first concentration value and the smoke value released by the battery module is detected to be greater than the first smoke value, the safety valve of the battery module is determined to be in an open state. For example, if the gas sensor detects that the concentration of the combustible gas released by the battery module is greater than a first concentration value (for example, the first concentration value is 2%), the smoke sensor detects that the smoke value released by the battery module is greater than the first smoke value (for example, 1%), and at this time, it is determined that the safety valve of the battery module is in an open state.
When the concentration value of the combustible gas released by the battery module is detected to be larger than a second concentration value, the smoke value released by the battery module is larger than a second smoke value, and the temperature of the battery module is larger than a first temperature value, it is determined that the battery module is in a thermal runaway state.
For example, if the gas sensor detects that the concentration value of the combustible gas released by the battery module is greater than a second concentration value (for example, the second concentration value is 4%), the smoke sensor detects that the smoke value released by the battery module is greater than a second smoke value (for example, the second smoke value is 2%), and at this time, it is determined that the battery module is in the thermal runaway state.
And when the temperature of the battery module is detected to be higher than the second temperature value, determining that the battery module is in a combustion state.
For example, if the temperature of the battery module detected by the temperature sensor is greater than the second temperature value (for example, the second temperature value is 170 ℃), at this time, it is determined that the battery module is in the combustion state.
And then, generating an operation score of the battery module according to the health state and the risk state, and controlling the battery module by using the operation score.
In the embodiment of the application, the operation score of the battery module can be obtained according to the scoring function. Illustratively, the scoring function may be expressed as:
G＝w1×S+w2×F
w1 and w2 represent weight coefficients, S represents a healthy state, and F represents a risk state.
The applicant found in research that 3 risk states of the battery seriously threaten the safety of the battery system, and based on the fact that the value of w1 is smaller than w2.
In the embodiment of the present application, the health status includes one of good and bad.
In the embodiment of the present application, the risk state of the battery module includes one of a thermal runaway state of the battery module, a combustion state of the battery module, and an open state of a safety valve of the battery module.
As shown in fig. 3, a charge and discharge control unit 2023 is disposed inside the battery management system BMS, wherein the charge and discharge control unit 2023 is configured to interrupt a charge and discharge process of the battery module when the operation score is smaller than a first preset threshold; and under the condition that the operation score is larger than a first preset threshold value, under the condition that the voltage of the battery module is smaller than a preset voltage threshold value, charging the battery module.
As shown in fig. 3, the battery system includes at least one battery module 201, a battery management system BMS202, and a first fire extinguishing unit 203. Wherein a communication connection is established between the first fire extinguishing unit 203 and the battery management system 302, for example, the first fire extinguishing unit 303 can communicate with the battery management system BMS302 through a bus; also for example, the first fire extinguishing unit 303 may communicate with the battery management system BMS302 by means of wireless bluetooth. In particular, the battery management system 302 may also power the first fire suppression unit 303.
In the prior art, four requirements (also called four elements of combustion) are needed for the generation and development of combustion, namely combustible materials, combustion-supporting materials, ignition sources and free radicals (chain reaction). Different fire extinguishing agents have different fire extinguishing mechanisms, and the speed of one or a plurality of stages in combustion is inhibited by eliminating one or a plurality of the four necessary conditions of combustion, namely, the source of one stage is cut off or chain reaction is broken off, and the generation of free radicals is stopped, thereby achieving the purpose of fire extinguishing.
Generally, the fire extinguishing mechanism of the fire extinguishing agent can be classified into four types according to four elements of combustion: sequestration, asphyxiation, cooling, and chemical inhibition.
In this application embodiment, the fire extinguishing unit can adopt the automatically controlled mode, and the time is erupted to the fire extinguishing agent of control in the fire extinguishing unit. When the unit starts, can spout a large amount of fire extinguishing agent in the twinkling of an eye, restrain the burning of battery module.
In embodiments of the present application, the fire extinguishing agent may be one or more of perfluorohexanone, heptafluoropropane, aerosol, nitrogen, and carbon dioxide.
In one example, the fire extinguishing mechanism of the fire extinguishing agent is chemical suppression. For example, when the fire-extinguishing agent is an aerosol, the fire-extinguishing unit may heat the aerosol. Under the action of heat, gasified metal ions such as Sr, K and Mg decomposed in the aerosol or cations losing electrons exist in the form of steam, and due to the extremely strong activity of the gasified metal ions, the gasified metal ions can have chain reaction with active groups such as H, OH and O in combustion for many times, and finally form non-combustible solid such as SrO and the like. Repeating the above steps, active groups in the combustion are consumed in large amounts, the concentration is reduced continuously, and the combustion is suppressed.
In one example, the fire suppression mechanism of the fire suppressant agent is cooling. For example, when the fire extinguishing agent is perfluorohexanone, the fire extinguishing unit can process liquid perfluorohexanone into mist state and pressurize and spray the mist to the ignition point, and the perfluorohexanone mainly depends on heat absorption to achieve the fire extinguishing effect.
And under the condition that the operation score is smaller than a second preset threshold value, spraying fire extinguishing agent to the battery module through the fire extinguishing unit.
In the embodiment of the present application, the first fire extinguishing unit may be disposed outside the battery system or disposed inside the battery system, and the embodiment of the present application is not particularly limited. For example, a battery system includes a battery system housing. In one example, the first fire suppression unit may be disposed within the battery system housing.
It should also be noted that the number of fire suppression units may be at least 2. Specifically, the at least two fire extinguishing units may be disposed outside the battery system, or may be disposed inside the battery system, and the embodiments of the present application are not particularly limited. For example, a battery system includes a battery system housing. In one example, at least two fire suppression units may be disposed within the battery system housing.
As can be known from the above description, the battery capacity of the battery module is acquired in real time by the power detection unit, and the battery capacity acquired in real time is compared with the historical battery capacity, thereby acquiring the state of health of the battery module based on the comparison result. Meanwhile, the risk state of the battery module is acquired through the risk detection unit, and then the operation score of the battery module is generated based on the health state and the risk state, and the battery module is controlled by the operation score. In this way, the safety of the battery system can be improved.
Taking the battery system shown in fig. 3 as an example, the battery system includes a battery management system BMS and at least two fire extinguishing units, wherein the at least two fire extinguishing units include at least one first fire extinguishing unit and at least one second fire extinguishing unit, and a flowchart of a control method of the battery system provided in the embodiment of the present application shown in fig. 4 is described below in detail how to ensure the safety of the battery system in the embodiment of the present application. As shown in fig. 4, the control method of the battery system may include, but is not limited to, the steps of:
step S400, acquiring the battery capacity of the battery module through the electric quantity detection unit, and acquiring the health state of the battery module based on the battery capacity and historical battery capacity information generated by the battery module in a preset time period;
step S402, acquiring a risk state of the battery module through the risk detection unit;
and S404, generating an operation score of the battery module according to the health state and the risk state, and controlling the battery module by using the operation score.
For the specific implementation of step S400-step S404, please refer to the foregoing description, which is not repeated herein. It is understood that this method can be applied to the battery system shown in fig. 2 and 3.
Fig. 5 is a schematic structural diagram of a battery management system BMS according to an embodiment of the present application. The battery management system BMS shown in fig. 5 may include a memory 501, a processor 502, a communication interface 503, and a bus 504. The memory 501, the processor 502 and the communication interface 503 are connected to each other by a bus 504.
The Memory 501 may be a Read Only Memory (ROM), a static Memory device, a dynamic Memory device, or a Random Access Memory (RAM). The memory 501 may store a program, and when the program stored in the memory 501 is executed by the processor 502, the processor 502 and the communication interface 503 are used to perform the respective steps performed by the battery management system BMS in the embodiment of the present application. For example, the risk state and the health state of the battery module are acquired through the battery management system BMS, and the score of the battery module is acquired according to the health state and the risk state.
The processor 502 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an Application Specific Integrated Circuit (ASIC), a Graphics Processing Unit (GPU) or one or more Integrated circuits, and is configured to execute related programs to implement the functions required to be executed by the battery management system BMS or to execute the fire extinguishing method provided by the embodiment of the present invention.
The processor 502 may also be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the training method of the neural network of the present application may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 502. The processor 502 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 501, and the processor 502 reads the information in the memory 501, and in combination with the hardware thereof, performs the functions required to be performed by the units included in the battery management system of the embodiment of the present application, or performs the fire extinguishing method provided by the embodiment of the method of the present application.
The communication interface 503 enables communication between the apparatus 50 and other devices or communication networks using transceiver means such as, but not limited to, a transceiver. For example, the training data (such as the data of the battery module referred to in the method embodiment of the present application) may be acquired through the communication interface 503.
Bus 504 may include a path to transfer information between various components of device 500 (e.g., memory 501, processor 502, communication interface 503).
For specific implementation of each functional device, reference may be made to relevant descriptions in the foregoing embodiments, and details of the embodiments of the present application are not described again.
Fig. 6 is a schematic block diagram of a cabinet provided in an embodiment of the present application. As shown in fig. 6, the cabinet 60 may include a plurality of battery systems 601. For the concrete representation of the battery system 60, please refer to the foregoing description, which will not be repeated herein.
It can be understood that, by implementing the embodiment of the present application, since the battery capacity and the risk state of the battery system are fully considered, and the operation score is obtained based on the battery capacity and the risk state of the battery system, the battery module can be controlled by using the operation score, and the safety of the battery system can be improved.
Fig. 7 is a schematic block diagram of an electronic device according to an embodiment of the present application. As shown in fig. 7, the electronic device includes a battery system 700. Here, for the concrete aspects of the battery system 700, reference is made to the foregoing description, and redundant description is not repeated herein.
In this embodiment of the application, the electronic device may be a charging device in an electric vehicle, may also be an energy storage device of a communication base station, and may also be a lithium electrical device, which is not specifically limited in this embodiment of the application.
It is understood that this method can be applied to the battery system shown in fig. 2 and 3.
Embodiments of the present invention also provide a computer storage medium having stored therein instructions, which when executed on a computer or processor, cause the computer or processor to perform one or more steps of a method according to any of the above embodiments. Based on the understanding that the constituent modules of the above-mentioned apparatus, if implemented in the form of software functional units and sold or used as independent products, may be stored in the computer-readable storage medium, and based on this understanding, the technical solutions of the present application, in essence, or a part contributing to the prior art, or all or part of the technical solutions, may be embodied in the form of software products, and the computer products are stored in the computer-readable storage medium.
The computer readable storage medium may be an internal storage unit, such as a hard disk or a memory, of the server according to the foregoing embodiment. The computer readable storage medium may be an external storage device of the server, such as a hard disk Card, a Smart Media Card (SMC), a Secure Digital (SD) Card, a flash Card (FlashCard), and the like. Further, the computer-readable storage medium may include both an internal storage unit and an external storage device of the server. The computer-readable storage medium is used for storing the computer program and other programs and data required by the server. The above-described computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.
It will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program, which can be stored in a computer-readable storage medium, and can include the processes of the above embodiments of the methods when the computer program is executed. And the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs.
The modules in the device can be merged, divided and deleted according to actual needs.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (9)
1. A battery system, characterized in that the battery system comprises a battery management system BMS, at least one battery module; the battery management system BMS comprises an electric quantity detection unit and a risk detection unit;
the battery management system BMS acquires the battery capacity of the battery module through the electric quantity detection unit, and acquires the health state of the battery module based on the battery capacity and historical battery capacity information generated by the battery module in a preset time period; when the battery capacity acquired in real time is between the historical maximum battery capacity and the historical minimum battery capacity of the battery module, indicating that the health state of the battery module is good; when the battery capacity acquired in real time is smaller than the historical minimum battery capacity, the health state of the battery module is poor;
the battery management system BMS acquires the risk state of the battery module through the risk detection unit;
the battery management system BMS generates an operation score of the battery module according to the health state and the risk state, the health state is associated with a corresponding weight coefficient, the risk state is associated with a corresponding weight coefficient, and the operation score is used for controlling the battery module; wherein the weight coefficient corresponding to the health state is smaller than the weight coefficient corresponding to the risk state.
2. The battery system according to claim 1, wherein the battery management system BMS further comprises a charge and discharge control unit, and the controlling the battery modules using the operation scores comprises:
and interrupting the charging and discharging process of the battery module through the charging and discharging control unit under the condition that the operation score is smaller than a first preset threshold value.
3. The battery system of claim 2, wherein the controlling the battery module using the operation score further comprises:
and under the condition that the operation score is greater than the first preset threshold value, detecting whether the battery voltage of the battery module is less than a preset voltage threshold value through the electric quantity detection unit, and under the condition that the battery voltage of the battery module is less than the preset voltage threshold value, charging the battery module.
4. The battery system according to claim 1, wherein the battery management system BMS further comprises a fire extinguishing unit that controls the battery module using the operation score, including:
under the condition that the operation score is smaller than a second preset threshold value, fire extinguishing agent is sprayed to the battery module through the fire extinguishing unit; wherein the second preset threshold is lower than the first preset threshold.
5. The battery system according to any one of claims 1 to 4, wherein the risk state of the battery module includes one of a thermal runaway state of the battery module, a combustion state of the battery module, and an open state of a safety valve of the battery module.
6. A control method of a battery system is characterized in that the battery system comprises a battery management system BMS and at least one battery module; the battery management system BMS comprises an electric quantity detection unit and a risk detection unit; the method comprises the following steps:
the battery management system BMS acquires the battery capacity of the battery module through the electric quantity detection unit, and acquires the health state of the battery module based on the battery capacity and historical battery capacity information generated by the battery module in a preset time period; when the battery capacity acquired in real time is between the historical maximum battery capacity and the historical minimum battery capacity of the battery module, indicating that the health state of the battery module is good; when the battery capacity acquired in real time is smaller than the historical minimum battery capacity, the health state of the battery module is poor;
the battery management system BMS acquires the risk state of the battery module through the risk detection unit;
the battery management system BMS generates an operation score of the battery module according to the health state and the risk state, the health state is associated with a corresponding weight coefficient, the risk state is associated with a corresponding weight coefficient, and the operation score is used for controlling the battery module; wherein the weight coefficient corresponding to the health status is smaller than the weight coefficient corresponding to the risk status.
7. A cabinet characterized in that it comprises a battery system according to any one of claims 1-5.
8. An electronic device characterized in that it comprises a battery system according to any of claims 1-5.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to execute the control method of a battery system according to claim 6.
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| CN112092675A (en) * | 2020-08-31 | 2020-12-18 | 长城汽车股份有限公司 | Battery thermal runaway early warning method, system and server |
| CN112186275A (en) * | 2019-07-04 | 2021-01-05 | 北京德意新能科技有限公司 | BMS system based on high in clouds |
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| CN110064149A (en) * | 2019-04-22 | 2019-07-30 | 泰州市盛飞液压件有限公司 | Couple the new energy bus battery automatic fire extinguisher and control method of BMS |
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| CN112186275A (en) * | 2019-07-04 | 2021-01-05 | 北京德意新能科技有限公司 | BMS system based on high in clouds |
| CN112092675A (en) * | 2020-08-31 | 2020-12-18 | 长城汽车股份有限公司 | Battery thermal runaway early warning method, system and server |
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Effective date of registration: 20240419 Address after: 412100 Building C5, Scientific Innovation Industrial Park, Nanzhou Town, Lukou District, Zhuzhou City, Hunan Province Patentee after: Hunan Dongzhou Energy Co.,Ltd. Country or region after: China Address before: 412100 Building C5, Scientific Innovation Industrial Park, Nanzhou Town, Lukou District, Zhuzhou City, Hunan Province Patentee before: Hunan Dongzhou Energy Co.,Ltd. Country or region before: China Patentee before: Liu Shenshu |