CN111211363A - Battery cell system - Google Patents
Battery cell system Download PDFInfo
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- CN111211363A CN111211363A CN202010033054.3A CN202010033054A CN111211363A CN 111211363 A CN111211363 A CN 111211363A CN 202010033054 A CN202010033054 A CN 202010033054A CN 111211363 A CN111211363 A CN 111211363A
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- battery cell
- battery
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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
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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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
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
- 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)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a battery cell system, which comprises a battery cell management system and a battery pack, wherein the battery pack comprises at least one battery cell, the battery cell comprises a battery cell monomer and a battery cell monitoring module which are packaged and combined together and electrically connected, a communication module is arranged in the battery cell monitoring module, and the communication module realizes the receiving and transmission of data information with the battery cell management system in a power line carrier communication or radio frequency wireless communication mode. The invention not only can realize the real-time monitoring of the state of each battery cell, but also can realize the communication between each battery cell monitoring module and the battery cell management system under the condition of not additionally adding a data line.
Description
Technical Field
The invention relates to a battery cell system, in particular to a battery cell system adopting a brand-new communication mode.
Background
The lithium battery is the most widely used electrochemical energy storage element at present, and due to the special structure and characteristics of the lithium battery, the battery monitoring and management circuit is an essential part in a lithium battery application system. In the current lithium battery application, for a small battery with a single battery cell, each battery is generally provided with a battery protection plate; and the battery pack with a plurality of battery cells connected in series and parallel is provided with a battery management system in the whole pack. The core of the battery protection circuit and the battery management system is a lithium battery protection and management chip. The simple lithium battery protection chip can realize overvoltage, overcurrent and overtemperature protection; the management system of the lithium battery pack comprises a special chip, a single chip microcomputer and other devices, and monitors and manages the whole battery pack and all serial-parallel units in the battery pack.
The defects of the prior art are limited, and the following defects exist in the aspects of lithium battery monitoring and management at present:
1. the management chip of the lithium battery is mainly used for monitoring the charging and discharging processes of the battery in real time, realizing overvoltage, overcurrent and overtemperature protection, has no acquisition capability of detailed information of the working state of the battery, and needs higher intervention of a battery management system for the values of current, voltage, temperature and the like.
2. At present, the charge and discharge protection chip of the lithium battery controls the work of the battery in real time and has no detailed information recording capacity of the working state of the battery. Even if data collection and recording are performed through the battery management system, the data are stored on the computer of the application system, namely, the terminal computer, and important historical information of the battery cannot be tightly bound with the battery. For battery cascading, one battery needs to serve multiple application systems, and when a lithium battery is migrated from one user system to another, historical data of the battery is difficult to obtain and utilize.
3. The battery management system only monitors and protects the charging and discharging of the lithium battery in the working system, and other links such as storage, transportation and the like are monitoring blind areas. For example, the monitoring of the temperature of the battery or the ambient temperature cannot be controlled in real time, and once the temperature of the battery rises due to the problem of the battery or the poor ambient environment, and further, a fire disaster is caused, the user cannot monitor and prepare in advance.
4. In the existing battery monitoring scheme, a special data line is needed for information transmission, and if each battery cell is to be used as an independent object for information acquisition and control, an additional data line needs to be connected to each battery cell, which increases a large number of data lines in the battery pack, resulting in high cost, complex structure, high failure rate and difficult maintenance.
Disclosure of Invention
The invention aims to provide a battery cell system which can complete data receiving and sending without a special data line.
In order to achieve the foregoing object, the present invention provides a battery cell system, which includes a battery cell management system and a battery pack, where the battery pack includes at least one battery cell, the battery cell includes a battery cell unit and a battery cell monitoring module, the battery cell unit and the battery cell monitoring module are packaged and combined together and electrically connected, a communication module is disposed in the battery cell monitoring module, and the communication module implements receiving and transmitting of data information with the battery cell management system in a power line carrier communication or radio frequency wireless communication manner.
As a further improvement of the invention, the cell monitoring module comprises
A battery cell monitoring chip,
the sensor is provided with a sensor which is used for detecting the position of the sensor,
and the sampling device is used for acquiring the working state and the environmental parameters of the battery cell through the sensor.
As a further improvement of the invention, the cell monitoring chip comprises
A first storage module and a processor, wherein the processor is used for operating the software program under the support of the first storage module,
a second storage module for storing data information,
the analog-to-digital conversion module converts the acquired information into digital information and provides the digital information to the processor for calculation processing, or directly stores the digital information into the second storage module,
the analog control circuit module realizes the control regulation and abnormal protection of the charging and discharging of the battery cell under the control of the processor,
the communication module is used for receiving and transmitting data information with the battery cell management system,
the second storage module may be integrated on the cell monitoring chip or separately disposed outside the cell monitoring chip, or disposed at the same time.
As a further improvement of the present invention, the first storage module includes one or both of a RAM memory and a ROM memory.
As a further improvement of the present invention, the data information stored by the second storage module includes data of the operating state of the battery cell, environmental data around the battery cell, and data calculated and processed by the processor.
As a further improvement of the present invention, the data of the cell operating state includes voltage, current, temperature, and the like.
As a further improvement of the present invention, the data of the environment around the battery cell includes temperature, humidity, and the like.
As a further improvement of the invention, the second storage module comprises one or more of a Flash memory, an EEPROM memory and a RAM memory.
As a further improvement of the invention, the mode of the communication module for transmitting and receiving the data information comprises one or more of power carrier communication and radio frequency wireless communication.
As a further improvement of the present invention, the battery cell monitoring chip further includes a data processing algorithm module, which is used for a calculation-intensive algorithm to implement a dedicated calculation logic.
The invention has the beneficial effects that:
the invention provides a battery cell, a battery cell monitoring module and a chip thereof, compared with the prior art, the battery cell monitoring module has the following advantages:
1. the battery cell monitoring chip is used for monitoring a single battery cell. Compared with a single-cell protection chip, the single-cell protection chip disclosed by the invention not only can realize basic charge and discharge protection on a single cell, but also can acquire working conditions, internal states and external environment data of the single lithium cell in real time; compared with the battery management system of the existing battery pack, the chip can acquire information of each battery cell, and the monitoring and the control are more precise and accurate.
2. The chip is provided with a communication interface, can respond to an external query command and return a query result, receives a control command and executes a control action. On the basis, the battery pack management system is realized, data can be acquired and control can be executed only by sending commands to each battery cell, and the complexity and the cost of the battery management system are reduced.
3. The chip is internally provided with the computing module, so that the analysis of real-time state and historical data of each battery cell can be carried out, the battery cell information can be more accurately and deeply obtained, and potential problems can be found.
4. The acquired historical data and event information of the battery core are stored in an on-chip or off-chip memory and are carried and transferred by the battery core in the whole life cycle of the battery core, so that the recording and query functions of the whole life cycle data of the battery core independent of an application system are realized.
5. In the conventional battery monitoring system, a special data line is required for information transmission, and if each battery cell is to be used as an independent object for information acquisition and control, each battery cell is required to be connected with an additional data line. The data transmission of the invention adopts power line carrier communication or radio frequency wireless communication, thereby reducing the cost and the system complexity and improving the reliability and the easy maintenance of the system.
Drawings
Fig. 1 is a schematic structural diagram of a battery cell system according to the present invention;
fig. 2 is a schematic diagram of a cell monitoring module according to the present invention;
fig. 3 is a schematic diagram of a battery cell monitoring chip according to the present invention;
fig. 4 is a schematic diagram of a single cell structure according to the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to specific embodiments shown in the drawings.
The embodiment provides a battery cell system, as shown in fig. 1 and 2, including a battery cell management system, a battery pack, a battery cell application system, and a power line connecting the battery pack and the battery cell application system, where the battery pack includes at least one battery cell, the battery cell includes a battery cell unit and a battery cell monitoring module, the battery cell monitoring module is provided with a communication module, and the communication module receives and transmits data information through a power line carrier communication or radio frequency wireless communication mode and the battery cell management system. The battery cell monitoring module comprises a battery cell monitoring chip, a sensor and a sampling device, and is used for acquiring the working state and the environmental parameters of the battery cell through the sensor.
The battery cell monitoring chip, as shown in fig. 3, includes a first storage module and a processor, where the processor is supported by the first storage module and is configured to run a software program, a second storage module and is configured to store data information, an analog-to-digital conversion module converts acquired information into digital information and provides the digital information to the processor for calculation or directly stores the digital information in the second storage module, where the acquired information includes, but is not limited to, voltage, current, temperature, and the like, an analog control circuit module implements control regulation and abnormal protection of charging and discharging of a battery cell under the control of the processor, and a communication module is configured to receive and transmit data information between the chip and other external systems, and the second storage module may be integrated on the battery cell monitoring chip or separately disposed outside the battery cell monitoring chip, or disposed simultaneously.
In this embodiment, the communication module may be integrated on the cell monitoring chip, or may be externally disposed on the cell monitoring chip. In practical application, the communication between the battery cell monitoring module and the battery cell management system of the battery pack can be performed through a power line for transmitting electric energy, and a special data line is not needed. When the battery core monitoring module and the battery core management system send data, digital information is modulated into carrier waves with voltage change and current change, and the carrier waves are superposed on a power line for transmission; when receiving data, the signal is extracted from the power line, and the digital information is restored through the demodulation circuit.
In addition, the battery cell monitoring module and the battery cell management system of the battery pack can also perform wireless communication through radio frequency electromagnetic waves without special data lines. When the battery core monitoring module and the battery core management system send data, the digital information is modulated into radio frequency electromagnetic waves to be sent out; when receiving data, the digital information is restored through a demodulation circuit.
Through the communication mode, the cell management system and each cell monitoring module can send query instructions, obtain monitoring data, issue control instructions and the like.
When the second storage module is arranged outside the battery cell monitoring chip, an external memory interface is arranged on the battery cell monitoring chip to provide a data read-write function of an external memory for the processor. The second storage module comprises one or more of a Flash memory, an EEPROM memory and a RAM memory.
The information stored by the second storage module comprises data of the working state of the battery core, environmental data around the battery core and data calculated and processed by the processor. The data of the cell working state comprise voltage, current, temperature and the like. The data of the surrounding environment of the battery cell comprise temperature, humidity and the like.
The battery cell monitoring chip is an integrated circuit chip formed by mixing an analog circuit and a digital circuit, and the first storage module comprises one or two of an RAM (random access memory) and an ROM (read only memory). The processor runs the software program with the support of the RAM/ROM memory. The program is used for realizing the control of the whole battery cell monitoring chip and an external battery cell monitoring module circuit; the program is also used for realizing a communication protocol, analyzing communication requests outside the battery cell monitoring chip and the battery cell monitoring module and giving communication feedback; the running program can also be an algorithm for carrying out operation analysis processing on the acquired data; the cell monitoring chip can add a special data processing algorithm module aiming at certain calculation-intensive algorithms (such as machine learning and the like), and the special calculation logic is realized by hardware.
The communication module transmits and receives data information in one or more modes of power carrier communication and radio frequency wireless communication. In addition, the communication module can also be independently arranged outside the battery cell monitoring chip like the second storage module.
In practical applications, the cell monitoring module and the cell unit are packaged together, as shown in fig. 4, to form an integral body which is inseparable in the whole life cycle. For example, when the battery cell is in a working state, various parameters of the battery cell itself, such as current, voltage, temperature and the like, are monitored in real time through the sensor and the sampling device, the analog-to-digital converter converts the acquired parameters into digital signals, the digital signals can be calculated and processed through a processor by a specific preset algorithm, and then the calculation processing result is stored in the second storage module, or the digital signals are directly stored in the second storage module without being calculated and processed by the processor. Similarly, for parameters of the surrounding environment of the electric core, the parameters are acquired by the sensor and the sampling device and then converted into digital signals through the analog-to-digital converter, and then the digital signals are further calculated and processed by the processor or directly stored in the second storage module.
Therefore, the battery cell is in a working state in the whole life cycle, and the state parameters of the surrounding environment are recorded on the second storage module packaged together with the battery cell in real time, so that data cannot be lost along with the transfer of the battery cell.
Based on the technical means, the invention not only solves the defects in the prior art, but also achieves various technical effects.
1. The battery cell monitoring chip is used for monitoring a single battery cell, not only has the overvoltage, overcurrent and overtemperature protection function, but also has the information acquisition functions of voltage, current, temperature, vibration and the like. Compared with a single-cell protection chip, the single-cell protection chip disclosed by the invention not only can realize basic charge and discharge protection on a single cell, but also can acquire working conditions, internal states and external environment data of the single lithium cell in real time; compared with the battery management system of the existing battery pack, the chip can acquire information of each battery cell, and the monitoring and the control are more precise and accurate.
2. The battery core monitoring chip is provided with a communication interface, and can be in wired communication or wireless communication. The external system can read the cell tag information, the real-time data and the historical data through the query command; the external system can adjust the charge and discharge parameters of the battery cell and the working setting of the chip through a control command; the battery pack management system can respond to an external query command to return a query result, receive a control command and execute a control action, and can acquire data and execute control by only sending the command to each battery cell, so that the complexity and the cost of the battery management system are reduced.
3. The battery cell monitoring chip is provided with a processor and an on-chip special computing module, and can execute data processing and analysis algorithms to perform computing analysis on real-time data and historical data; the calculation result can be stored and output, and the built-in calculation module of the working state chip can be adjusted according to the calculation result, so that the analysis of real-time state and historical data can be performed on each battery cell, the battery cell information can be acquired more accurately and deeply, and potential problems can be found.
4. The battery cell monitoring chip is provided with an on-chip memory or an external memory interface, collected battery cell historical data can be stored in the memory, and the stored data precision and frequency can be configured. Data are continuously accumulated in the whole life cycle of the battery cell, the acquired historical data and event information of the battery cell are carried for the whole life cycle of the battery cell and stored in an on-chip or off-chip memory, and the data are carried and transferred by the battery cell in the whole life cycle of the battery cell, so that the recording and query functions of the data of the whole life cycle of the battery cell independent of an application system are realized.
5. In the conventional battery monitoring system, a special data line is required for information transmission, and if each battery cell is to be used as an independent object for information acquisition and control, each battery cell is required to be connected with an additional data line. The data transmission of the invention adopts power line carrier communication or radio frequency wireless communication, thereby reducing the cost and the system complexity and improving the reliability and the easy maintenance of the system.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a battery cell system, includes electric core management system, group battery, its characterized in that: the battery pack comprises at least one battery cell, the battery cell comprises a battery cell monomer and a battery cell monitoring module which are packaged and combined together and electrically connected, a communication module is arranged in the battery cell monitoring module, and the communication module receives and transmits data information through a power line carrier communication or radio frequency wireless communication mode and a battery cell management system.
2. The cell system of claim 1, wherein: the cell monitoring module comprises a cell monitoring chip,
the sensor is provided with a sensor which is used for detecting the position of the sensor,
and the sampling device is used for acquiring the working state and the environmental parameters of the battery cell through the sensor.
3. The cell system of claim 2, wherein: the battery cell monitoring chip comprises
A first storage module and a processor, wherein the processor is used for operating the software program under the support of the first storage module,
a second storage module for storing data information,
the analog-to-digital conversion module converts the acquired information into digital information and provides the digital information to the processor for calculation processing, or directly stores the digital information into the second storage module,
the analog control circuit module realizes the control regulation and abnormal protection of the charging and discharging of the battery cell under the control of the processor,
the communication module is used for receiving and transmitting data information with the battery cell management system,
the second storage module may be integrated on the cell monitoring chip or separately disposed outside the cell monitoring chip, or disposed at the same time.
4. The cell system of claim 3, wherein: the first storage module comprises one or two of a RAM memory and a ROM memory.
5. The cell system of claim 3, wherein: the data information stored by the second storage module comprises data of the working state of the battery core, environmental data around the battery core and data calculated and processed by the processor.
6. The cell system of claim 5, wherein: the data of the working state of the battery core comprise voltage, current, temperature and the like.
7. The cell system of claim 5, wherein: the data of the surrounding environment of the battery core comprise temperature, humidity and the like.
8. The cell system of claim 3, wherein: the second storage module comprises one or more of a Flash memory, an EEPROM memory and a RAM memory.
9. The cell system of claim 3, wherein: the communication module transmits and receives data information in one or more modes of power carrier communication and radio frequency wireless communication.
10. The cell system of claim 3, wherein: the battery core monitoring chip also comprises a data processing algorithm module which is used for calculating an intensive algorithm and realizing a special calculation logic.
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| CN202010033054.3A CN111211363A (en) | 2020-01-13 | 2020-01-13 | Battery cell system |
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| CN202010033054.3A CN111211363A (en) | 2020-01-13 | 2020-01-13 | Battery cell system |
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Application publication date: 20200529 |
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| WD01 | Invention patent application deemed withdrawn after publication |