CN108400397B - Battery management system and platform - Google Patents
Battery management system and platform Download PDFInfo
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- CN108400397B CN108400397B CN201810273084.4A CN201810273084A CN108400397B CN 108400397 B CN108400397 B CN 108400397B CN 201810273084 A CN201810273084 A CN 201810273084A CN 108400397 B CN108400397 B CN 108400397B
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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
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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
- H01M10/42—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to the technical field of electric automobiles, and provides a battery management system and a platform. The battery management system comprises a voltage acquisition module, a control module, a switch module, an energy storage module and a mobile communication module. The voltage acquisition module, the switch module and the mobile communication module are all connected with the control module, and the switch module is connected with the energy storage module. The voltage acquisition module acquires voltage information of the single batteries and sends the voltage information to the control module, the control module determines the batteries to be balanced based on the voltage information, and then controls the switch module based on the current balancing rule, so that the batteries to be balanced are conducted with the energy storage module and balanced. The mobile communication module can acquire a new balancing rule from the server to update the current balancing rule, so that a battery balancing scheme with a good balancing effect can be applied to a battery management system in time, the service life of a battery is prolonged, and safety accidents are avoided.
Description
Technical Field
The invention relates to the field of electric automobiles, and provides a battery management system and a platform.
Background
With the aggravation of energy crisis and the increasing attention of people to environmental protection, the industrialization scale of new energy automobiles is getting bigger and bigger, and the new energy automobiles start to gradually replace the traditional fuel automobiles. Meanwhile, some potential safety hazards of new energy automobiles are gradually shown. An electric vehicle using a battery as a power source is the most common new energy vehicle, but is limited by the manufacturing technology of the battery, and the safety accidents related to the battery often occur during the driving, charging and parking processes of the electric vehicle. To ensure management and monitoring of the battery, a battery management system is generally installed in the electric vehicle.
An important function of the battery management system is to achieve battery balancing, which means that the voltage difference between the single batteries in the battery pack is kept within a desired range by using power electronic technology, so as to prolong the service life of the battery. Battery equalization is a research hotspot in the field of battery management, and new battery equalization methods are developed in a large number, however, the battery equalization methods adopted in the existing battery management systems are generally solidified in the systems, and it is difficult to apply the new battery equalization methods with better equalization effects to the battery management systems in time.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a battery management system and a platform to solve the above problems in the prior art.
The embodiment of the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a battery management system, which is installed in an electric vehicle, and includes
The voltage acquisition module is connected with the single batteries in the battery pack of the electric automobile and used for acquiring voltage information of the single batteries;
the control module is connected with the voltage acquisition module and is used for acquiring voltage information from the voltage acquisition module and determining a battery to be balanced in the single batteries based on the voltage information;
the switch module is respectively connected with the control module and the single battery;
the control module is also used for controlling the switch module based on the current equalization rule so as to enable the battery to be equalized to be conducted with the energy storage module, and when the battery to be equalized is conducted with the energy storage module, the energy storage module charges the battery to be equalized or discharges the battery to be equalized to the energy storage module, wherein the current equalization rule is a first equalization rule;
and the mobile communication module is connected with the control module, is used for receiving the second equalization rule sent by the server and sending the second equalization rule to the control module, and is also used for determining the second equalization rule as the current equalization rule.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the control module is further configured to obtain a maximum voltage value and a minimum voltage value of each battery cell in the battery pack based on the voltage information, and determine the battery to be equalized based on the voltage information when it is determined that a voltage difference value between the maximum voltage value and the minimum voltage value is greater than a preset voltage difference value.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the control module is further connected to a vehicle controller of the electric vehicle, and is configured to obtain a system operating condition of the electric vehicle from the vehicle controller, and control the switch module based on a current balancing rule when the system operating condition is determined to be a first operating condition suitable for battery balancing, so as to enable the battery to be balanced to be conducted with the energy storage module.
With reference to the first aspect, the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the battery management system further includes: the current acquisition module is respectively connected with the single battery and the control module and is used for acquiring current information of the single battery and sending the current information to the control module;
the control module is also used for calculating and obtaining the residual capacity information of the single batteries based on the current information.
With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the battery management system further includes: and the display module is connected with the control module and is used for obtaining and displaying the residual electric quantity information from the control module.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the battery management system further includes:
and the sensor module is respectively connected with the single battery and the control module, and is used for acquiring the state parameters of the single battery and sending the state parameters to the control module.
With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the sensor module includes one or more of a temperature sensor, a humidity sensor, a smoke detector, a flame detector, a combustion gas detector, and a pressure sensor.
With reference to the fifth or sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the battery management system further includes: and the alarm module is connected with the control module, and the control module is also used for controlling the alarm module to alarm when the abnormal condition of the single battery is determined based on the voltage information, the current information or the state parameters.
With reference to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, the mobile communication module includes one or more of a 2G module, a 3G module, a 4G module, and an NB-IoT module.
In a second aspect, an embodiment of the present invention provides a battery management platform, which includes a server and a battery management system provided in the first aspect of the present invention or any one of the foregoing possible implementations of the first aspect, where the battery management system is in communication connection with the server.
The technical scheme of the embodiment of the invention at least has the following beneficial effects:
the embodiment of the invention provides a battery management system which is arranged on an electric automobile and comprises a voltage acquisition module, a control module, a switch module, an energy storage module and a mobile communication module. The voltage acquisition module and the switch module are connected with a single battery in a battery pack of the electric automobile, the voltage acquisition module and the switch module mobile communication module are connected with the control module, and the switch module is connected with the energy storage module. When the battery management system works, the voltage acquisition module acquires voltage information of the single batteries and sends the voltage information to the control module, the control module firstly determines batteries to be equalized in the single batteries based on the voltage information, then controls the switch module according to current equalization rules stored in the control module, so that the batteries to be equalized are conducted with the energy storage module, when the batteries to be equalized are conducted, the energy storage module can charge the batteries to be equalized with lower voltage, the batteries to be equalized with higher voltage can also discharge to the energy storage module, finally the batteries to be equalized reach an equalization state, and the specific equalization process is defined by the current equalization rules. The mobile communication module can perform data interaction with a server in communication connection with the mobile communication module, if the current balancing rule is the first balancing rule, the mobile communication module can receive a second balancing rule different from the first balancing rule from the server and send the second balancing rule to the control module, and the control module can set the second balancing rule as the current balancing rule, so that updating of the current balancing rule is completed.
Therefore, the battery management system provided by the embodiment of the invention realizes the timely update of the current equalization rule used by the battery management system by arranging the mobile communication module. Meanwhile, the battery management system can collect the voltage information of the single batteries in real time, timely judges the single batteries needing to be balanced, and balances the single batteries based on the current balancing rule, so that the voltage of each single battery in the battery pack can be timely adjusted, each single battery is always kept under the same or similar working voltage, the conditions of over-charging and over-discharging of the single batteries are avoided, the service life of the battery can be prolonged, and safety accidents are prevented. In addition, the balancing process is completed by the energy storage module and the single battery in a bidirectional energy interaction mode, and the full utilization and reasonable distribution of the electric energy in the single battery and the electric energy in the energy storage module are facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a battery management system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery management system according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a sensor module according to a second embodiment of the present invention;
fig. 4 shows a schematic structural diagram of a battery management platform according to a third embodiment of the present invention.
In the figure: 1-a battery management platform; 10-a battery management system; 100-a voltage acquisition module; 110-a control module; 120-a switch module; 130-an energy storage module; 140-a mobile communication module; 150-a sensor module; 150 a-temperature sensor; 150 b-a humidity sensor; 150 c-a smoke detector; 150 d-flame detector; 150 e-a combustion gas detector; 150 f-pressure sensor; 160-a current collection module; 170-a display module; 180-an alarm module; 20-a server; 30-single battery.
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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The first embodiment:
fig. 1 shows a schematic structural diagram of a battery management system 10 according to a first embodiment of the present invention. Referring to fig. 1, the battery management system 10 is installed on an electric vehicle and includes a voltage acquisition module 100, a control module 110, a switching module 120, an energy storage module 130, and a mobile communication module 140. The power battery of the electric automobile is a battery pack comprising one or more single batteries 30, the voltage acquisition module 100 and the switch module 120 are both connected with each single battery 30 in the battery pack, the voltage acquisition module 100 and the switch module 120 are both connected with the control module 110, and the switch module 120 is connected with the energy storage module 130.
The control module 110 is used to implement processing, control and operation functions in the battery management system 10. The control module 110 may be implemented by, but not limited to, a single chip Microcomputer (MCU), a Central Processing Unit (CPU), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and the like, and the control module 110 may further have a data storage function, or in some embodiments, may further perform data storage by setting a dedicated storage module (not shown) connected to the control module 110.
When the battery management system 10 is in operation, the voltage collecting module 100 collects voltage information of each battery cell 30 in real time or at regular time and transmits the voltage information to the control module 110, wherein the voltage information may be a voltage value on each battery cell 30. The voltage acquisition module 100 may be implemented by using an a/D chip with a voltage acquisition function and a corresponding filter circuit, but is not limited to this implementation. The control module 110 first determines a battery to be equalized among the unit batteries 30 based on the voltage information. Various strategies can be adopted for determining the battery to be equalized, for example, the single battery 30 corresponding to the maximum voltage value in the voltage information and/or the single battery 30 corresponding to the minimum voltage value in the voltage information can be used as the battery to be equalized. For another example, the single battery 30 corresponding to the voltage value greater than a certain preset voltage value in the voltage information is used as the battery to be equalized, and/or the single battery 30 corresponding to the voltage value less than another preset voltage value in the voltage information is used as the battery to be equalized. Of course, other strategies may be adopted, and are not limited in the first embodiment of the present invention.
For the battery equalization, the equalization may be performed only when it is determined that the voltage difference between the respective unit batteries 30 is out of the expected range, and if the voltage difference between the respective unit batteries 30 is out of the range although it exists, the processing may be temporarily not performed. In one embodiment, the control module 110 first obtains a maximum voltage value and a minimum voltage value in the voltage information, then calculates a voltage difference between the maximum voltage value and the minimum voltage value, and determines whether the voltage difference is greater than a preset voltage difference. If the judgment result is yes, the voltage difference between the single batteries 30 is large, battery equalization is needed, and if the judgment result is no, the voltage difference between the single batteries 30 is still within an acceptable range, and the battery equalization is not needed.
After the control module 110 determines that a cell is ready to be equalized, cell equalization may begin. In an embodiment, the control module 110 is further connected to a vehicle control unit (not shown) of the electric vehicle, the control module 110 is capable of obtaining a current system operating condition of the electric vehicle from the vehicle control unit, and determining whether the current time is suitable for battery equalization according to the system operating condition, if the system operating condition is a first operating condition suitable for battery equalization, equalizing the battery to be equalized, and if the system operating condition is a second operating condition not suitable for battery equalization, not executing the battery equalization step, or not executing the battery equalization temporarily, and only recording the battery to be equalized until the system operating condition obtained again from the vehicle control unit becomes the first operating condition, and then performing the battery equalization. For example, the system operating condition is a vehicle fault state, and at this time, the electric vehicle fault should be checked first, and is not suitable for battery balancing. For another example, even when the electric vehicle is turned off, the battery equalization is not suitable. Obviously, the above system operating conditions are only examples, and do not represent actual system operating conditions, nor indicate that battery equalization must not be performed under the above system operating conditions.
The switch module 120 is located between the single battery 30 and the energy storage module 130, the switch module 120 can adopt a Field Programmable Gate Array (FPGA) to realize the function of a large-scale logic switch array, and the energy storage module 130 can be realized by a storage battery, which can be an independent module or a storage battery of an electric vehicle. The control module 110 controls the switch module 120 based on the current balancing rule, so that the battery to be balanced is in a conducting state with the energy storage module 130, and the other single batteries 30 are in a disconnected state with the energy storage module 130. When the battery to be equalized is conducted with the energy storage module 130, the energy storage module 130 charges the battery to be equalized, or the battery to be equalized discharges the energy storage module 130. Specifically, whether charging or discharging is determined by the voltage value of the battery to be equalized, and when the voltage value of the battery to be equalized is greater than the average value of the voltage values of the individual batteries 30, discharging can be performed; when the voltage value of the battery to be equalized is less than the average value of the voltage values of the individual batteries 30, charging may be performed. The voltage value of the battery to be equalized approaches to the average value of the voltage values of the individual batteries 30 through the charging and discharging operations, and this process is the battery equalization process. In specific implementation, all the batteries to be equalized can be equalized at the same time, or the batteries to be equalized can be equalized one by one according to a preset sequence, for example, the battery to be equalized with a voltage value deviating from the average value of the voltage values is equalized first, so that the battery to be equalized is prevented from being in a fault due to long-term overcharge or overdischarge state. The equalization rule is actually a predefined control scheme for the switch module 120, and can be implemented as a preset software instruction, and the control module 110 controls the on/off timing, duration, sequence, and the like of the switch module 120 based on the equalization rule, so as to control the charging/discharging timing, charging/discharging duration, charging/discharging sequence, and the like of the battery to be equalized, that is, to control the entire battery equalization process. Obviously, a well-defined balancing rule is significant for effectively balancing the battery and prolonging the service life of the battery, and the balancing rule currently used by the control module 110 is referred to as a current balancing rule. In the first embodiment of the present invention, the content of the current equalization rule is not limited, and may be any existing equalization rule. A bidirectional DC/DC converter may be disposed in the switch module 120 to realize charging and discharging between the battery to be equalized and the energy storage module 130. As an alternative embodiment, the energy storage module 130 may be connected to the control module 110 to supply power to the control module 110 as a power source, but in other embodiments, the control module 110 may also be powered by other power supply devices.
In the battery management system 10 according to the first embodiment of the present invention, the current balancing rule in the control module 110 may be updated, and the updating of the current balancing rule is implemented by the mobile communication module 140. For example, the current balancing rule is a first balancing rule, the mobile communication module 140 is in communication connection with the remote server 20, a second balancing rule different from the first balancing rule may be stored in the remote server 20, for example, the balancing time using the second balancing rule is shorter than the balancing time using the first balancing rule, the server 20 may issue the second balancing rule to the mobile communication module 140 through the mobile communication network, the mobile communication module 140 forwards the second balancing rule to the control module 110, and the control module 110 resets the current balancing rule to the second balancing rule at an appropriate time, thereby completing updating of the current balancing rule. The appropriate timing may be a timing at which cell equalization is not necessary. In this example, after the current balancing rule is updated to the second balancing rule, the efficiency of battery balancing is improved. The second balancing rule may be issued by the server 20 actively, for example, when the server 20 considers that the first balancing rule in use has some defects, the second balancing rule may be issued actively, and in other embodiments, the control module 110 may also send a request message to the server 20 actively, and the server 20 responds to the request, and then issues the second balancing rule to the mobile communication module 140 and finally forwards the second balancing rule to the control module 110.
In one embodiment, the mobile communication module 140 may further include one or more of a 2G module, a 3G module, a 4G module, and an NB-IoT module in order to support different mobile communication systems. The mobile communication module 140 relies on the mobile communication network for data transmission, and currently, in china, the coverage areas of 2G, 3G and 4G mobile communication networks are very wide, while NB-IoT networks are being popularized and popularized, so that the application range of the battery management system 10 provided in the first embodiment of the present invention is very wide, and the updating of the current balancing rule can be realized within the coverage area of the mobile communication network. Meanwhile, to ensure the communication quality, as described above, the mobile communication module 140 may also be a combination of a plurality of communication modules, for example, including both a 2G module and a 4G module, and using the 4G module to communicate with the server 20 in case of having a 4G mobile communication network coverage, and using the 2G module to communicate with the server 20 in case of having only a 2G mobile communication network coverage. The server 20 may be a single server, may be a combination of a plurality of servers, may be a physical server, or may be a virtual server.
In summary, the battery management system 10 provided in the first embodiment of the present invention can acquire the voltage information of the single batteries 30 in real time, determine the single batteries 30 that need to be equalized in time, and equalize the single batteries 30 based on the current equalization rule, so as to adjust the voltage of each single battery 30 in the battery pack in time, so that each single battery 30 is always kept at the same or similar working voltage, thereby avoiding the overcharge and overdischarge of the single battery 30, further prolonging the service life of the battery, and preventing safety accidents. The current balancing rule used in the battery balancing process can be updated, the mobile communication module 140 of the battery management system 10 can obtain a new balancing rule from the server 20 and send the new balancing rule to the control module 110, and the control module 110 updates the current balancing rule to the new balancing rule, so that when a balancing rule with a better effect appears, the balancing rule can be timely applied to the battery management system 10 of the electric vehicle, and the effect can be exerted as soon as possible. Meanwhile, in this embodiment, the balancing process is completed by performing bidirectional energy interaction between the energy storage module 130 and the single battery 30, which is beneficial to fully utilizing and reasonably distributing the electric energy in the single battery 30 and the electric energy in the energy storage module 130. In addition, in some embodiments of the first embodiment of the present invention, before performing battery balancing, the control module 110 may further obtain a current system operating condition of the electric vehicle from the vehicle controller, and determine whether the battery balancing is suitable for performing, so that the battery management is more reasonable and accurate.
Second embodiment:
fig. 2 shows a schematic structural diagram of a battery management system 10 according to a second embodiment of the present invention. Referring to fig. 2, on the basis of the battery management system 10 provided in the first embodiment of the present invention, the battery management system 10 provided in the second embodiment of the present invention may further include a current collecting module 160. The current collection module 160 is similar to the voltage collection module 100, and the current collection module 160 is connected to each unit cell 30 in the battery pack and simultaneously connected to the control module 110. The current collecting module 160 collects current information of each unit battery 30 in real time or at regular time and transmits the current information to the control module 110, wherein the current information may be a current value on each unit battery 30. The current collection module 160 may be implemented by using an a/D chip with a current collection function and a corresponding filter circuit, but is not limited to this implementation.
The control module 110 calculates the remaining capacity information of each battery cell 30 by integrating the current according to the current information. Of course, in some implementations, the remaining capacity information may also be roughly estimated by the voltage value of the unit battery 30. As an alternative embodiment, the battery management system 10 further includes a display module 170 connected to the control module 110, and the control module 110 may send the remaining power information to the display module 170 for display, so that the user can visually know the remaining power of each single battery 30. Further, if the single battery 30 is performing battery equalization, the user can visually observe the effect of battery equalization, so as to manually determine whether the battery management system 10 is operating normally. The display module 170 may be an independent module, or may directly adopt a central control liquid crystal display or a liquid crystal instrument panel of the electric vehicle.
With continued reference to fig. 2, in one implementation of the second embodiment of the present invention, the battery management system 10 may further include a sensor module 150. The sensor module 150 is connected to the single battery 30 and the control module 110, and the sensor module 150 collects a state parameter representing a working state or a working environment of the single battery 30 and transmits the state parameter to the control module 110. Fig. 3 shows a schematic structural diagram of a sensor module 150 according to a second embodiment of the present invention. Referring to fig. 3, the sensor module 150 may include one or more of a temperature sensor 150a, a humidity sensor 150b, a smoke detector 150c, a flame detector 150d, a combustion gas detector 150e, and a pressure sensor 150f, each of which may be one or more. Specifically, the single battery 30 has different working performances under different temperatures and humidities, which may even affect the service life of the battery, for example, the working temperature of the lithium ion battery should be preferably kept at 25 ℃ to 40 ℃. The temperature sensor 150a is arranged to collect temperature data of the working environment of the single battery 30 as one of the state parameters and send the state parameters to the control module 110, so that the temperature condition of the single battery 30 can be monitored in real time. The humidity sensor 150b is arranged to collect humidity data of the working environment of the single battery 30 as one of the state parameters and send the humidity data to the control module 110, so that the humidity condition of the single battery 30 is monitored in real time. The smoke detector 150c, the flame detector 150d, and the combustion gas detector 150e are used to detect smoke, open fire, and combustible gas, respectively. When severe abnormal conditions such as blowout occur in the single battery 30, the detector generates alarm information and sends the alarm information to the control module 110, so that the real-time monitoring of the severe abnormal conditions of the single battery 30 is realized. When the core of the battery cell 30 is severely displaced or expanded, the pressure inside the battery will be greatly changed, and further safety accidents are caused. The pressure sensor 150f collects pressure data inside the unit battery 30 and transmits the same to the control module 110, thereby implementing real-time monitoring of the pressure condition inside the unit battery 30. It should be apparent that the above sensors are only examples, the sensor module 150 may also include more kinds of sensors according to actual requirements, and the status parameters may also be displayed on the display module 170 so as to be known to the user in time.
With continued reference to fig. 2, in one implementation of the second embodiment of the present invention, the battery management system 10 may further include an alarm module 180. The alarm module 180 is connected to the control module 110, and when the control module 110 further analyzes the voltage information obtained from the voltage acquisition module 100, the current information obtained from the current acquisition module 160, or the state parameters obtained from the sensor module 150, and determines that the abnormal condition exists in the single battery 30 according to the analysis result, the alarm module 180 is controlled to give an alarm, so that the user can timely know the abnormal condition and take corresponding measures, such as stopping for maintenance. Wherein, alarm module 180 can be independent alarm, conveys alarm information to the user through forms such as reputation electricity, in some embodiments, also can not set up alarm module 180, carries out the demonstration of alarm information through display module 170, perhaps plays alarm information through the inside speaker of electric automobile.
In summary, the battery management system 10 according to the second embodiment of the present invention further realizes the function of acquiring the current information of the single battery 30 and the function of acquiring the state parameter of the single battery 30 on the basis of acquiring the voltage information, and meanwhile, the acquired data may be displayed through the display module 170, and an alarm may be given based on the acquired data through the alarm module 180. Thereby realizing the overall monitoring of the single batteries 30 in the battery pack. For the battery equalization function of the battery management system 10, reference may be made to the description of the first embodiment, and the description will not be repeated here.
The third embodiment:
fig. 4 shows a schematic structural diagram of a battery management platform 1 according to a third embodiment of the present invention. Referring to fig. 4, the battery management platform 1 includes a server 20 and at least one battery management system 10 provided in the first embodiment or the second embodiment of the present invention. Wherein each battery management system 10 is communicatively connected to the server 20 through the mobile communication module 140. Thus, the server 20 can perform a uniform update upgrade on the balancing rules used in at least one battery management system 10. Obviously, the information interaction between the server 20 and the battery management system 10 is not limited to the equalization rule, for example, the battery management system 10 may also upload the collected data to the server 20, so as to perform big data analysis on the server 20 side, thereby improving the battery management system 10 or the battery pack. For another example, the server 20 may send the control information to the battery management system 10 to remotely control the battery management system 10.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A battery management system installed on an electric vehicle includes
The voltage acquisition module is connected with a single battery in a battery pack of the electric automobile and is used for acquiring voltage information of the single battery;
the control module is connected with the voltage acquisition module and used for acquiring the voltage information from the voltage acquisition module and determining a battery to be balanced in the single batteries based on the voltage information;
the switch module is respectively connected with the control module and the single battery;
the control module is further used for controlling the switch module based on a current equalization rule so as to enable the battery to be equalized to be conducted with the energy storage module, and when the battery to be equalized is conducted with the energy storage module, the energy storage module charges the battery to be equalized or the battery to be equalized discharges the energy storage module, wherein the current equalization rule is a first equalization rule;
and the mobile communication module is connected with the control module, is used for receiving a second equalization rule sent by a server and sending the second equalization rule to the control module, and is also used for determining the second equalization rule as the current equalization rule.
2. The battery management system according to claim 1, wherein the control module is further configured to obtain a maximum voltage value and a minimum voltage value of the battery cells in the battery pack based on the voltage information, and determine the battery to be equalized based on the voltage information when it is determined that a voltage difference value between the maximum voltage value and the minimum voltage value is greater than a preset voltage difference value.
3. The battery management system according to claim 2, wherein the control module is further connected to a vehicle control unit of the electric vehicle, and configured to obtain a system operating condition of the electric vehicle from the vehicle control unit, and control the switch module based on the current balancing rule when it is determined that the system operating condition is a first operating condition suitable for battery balancing, so as to conduct the battery to be balanced and the energy storage module.
4. The battery management system of any of claims 1-3, further comprising: the current acquisition module is respectively connected with the single battery and the control module, and is used for acquiring current information of the single battery and sending the current information to the control module;
the control module is also used for calculating and obtaining the residual electric quantity information of the single battery based on the current information.
5. The battery management system of claim 4, further comprising: and the display module is connected with the control module and is used for obtaining and displaying the residual electric quantity information from the control module.
6. The battery management system of claim 5, further comprising:
the sensor module is respectively connected with the single battery and the control module, and is used for acquiring the state parameters of the single battery and sending the state parameters to the control module.
7. The battery management system of claim 6, wherein the sensor module comprises one or more of a temperature sensor, a humidity sensor, a smoke detector, a flame detector, a combustion gas detector, and a pressure sensor.
8. The battery management system according to claim 6 or 7, further comprising: and the alarm module is connected with the control module, and the control module is also used for controlling the alarm module to alarm when the abnormal condition of the single battery is determined based on the voltage information, the current information or the state parameters.
9. The battery management system of claim 8, wherein the mobile communication module comprises one or more of a 2G module, a 3G module, a 4G module, and an NB-IoT module.
10. A battery management platform comprising a server and at least one battery management system according to any of claims 1-9, said battery management system being communicatively coupled to said server.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR3140210A1 (en) * | 2022-09-27 | 2024-03-29 | Arts Energy | Battery pack comprising a plurality of accumulators with integrated connectivity allowing the acquisition and exploitation of data in operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109910618A (en) * | 2019-03-28 | 2019-06-21 | 重庆长安新能源汽车科技有限公司 | A kind of battery safety management method, apparatus and new-energy automobile |
| CN110667435A (en) * | 2019-09-26 | 2020-01-10 | 武汉客车制造股份有限公司 | Fire monitoring and early warning system and method for new energy automobile power battery |
| CN110931895B (en) * | 2019-11-27 | 2023-05-30 | 深圳市科陆电子科技股份有限公司 | BMS battery balance maintenance method |
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| CN206790180U (en) * | 2017-06-09 | 2017-12-22 | 湖南航天捷诚电子装备有限责任公司 | A kind of battery management system |
| CN107797073A (en) * | 2017-11-22 | 2018-03-13 | 安徽零度新能源科技有限公司 | Dynamic lithium battery group real-time monitoring system and its monitoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR3140210A1 (en) * | 2022-09-27 | 2024-03-29 | Arts Energy | Battery pack comprising a plurality of accumulators with integrated connectivity allowing the acquisition and exploitation of data in operation |
| WO2024068762A1 (en) * | 2022-09-27 | 2024-04-04 | Arts Energy | Battery pack comprising a plurality of rechargeable batteries with integrated connectivity, allowing acquisition and use of data during operation |
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