CN110661043A - Battery management circuit, control method thereof and battery management system - Google Patents
Battery management circuit, control method thereof and battery management system Download PDFInfo
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- CN110661043A CN110661043A CN201810701477.0A CN201810701477A CN110661043A CN 110661043 A CN110661043 A CN 110661043A CN 201810701477 A CN201810701477 A CN 201810701477A CN 110661043 A CN110661043 A CN 110661043A
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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
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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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- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention provides a battery management circuit, a control method thereof and a battery management system, relates to the technical field of battery management, and can realize the resetting of a battery management module through a microcontroller. The battery management circuit includes: the microcontroller comprises a reset control end; the battery management module comprises a reset terminal; the reset control end of the microcontroller is in communication connection with the reset end of the battery management module through the watchdog module; under a first working mode, the microcontroller is used for stopping sending a dog feeding signal to the watchdog module, the watchdog module is used for sending a reset signal to the battery management module when the dog feeding signal is not received within a first preset time length, and the battery management module is used for responding to the reset signal to restore the initialization state operation. The technical scheme is mainly used for battery management equipment and systems.
Description
Technical Field
The invention relates to the technical field of battery management, in particular to a battery management circuit, a control method thereof and a battery management system.
Background
With the integration of integrated circuits becoming higher, the functions of BATTERY management circuits in BATTERY management systems (BATTERY MANAGEMENT SYSTEM, BMS) become more powerful, and the BATTERY management circuits integrate Microcontrollers (MCUs) and BATTERY management modules. There is currently a lack of effective solutions for resetting the battery management module.
Disclosure of Invention
The embodiment of the invention provides a battery management circuit, a control method thereof and a battery management system, which can realize the resetting of a battery management module through a microcontroller.
In one aspect, an embodiment of the present invention provides a battery management circuit, including:
the microcontroller comprises a reset control end;
the battery management module comprises a reset terminal;
the reset control end of the microcontroller is in communication connection with the reset end of the battery management module through the watchdog module;
in a first working mode, the microcontroller is configured to stop sending a dog feeding signal to the watchdog module, the watchdog module is configured to send a reset signal to the battery management module when the watchdog module does not receive the dog feeding signal within a first preset time period, and the battery management module is configured to perform an initialization state restoring operation in response to the reset signal;
under the second mode of operation, microcontroller be used for to watchdog module regularly sends the dog feeding signal, the time interval of regularly sending the dog feeding signal is less than first predetermineeing duration, watchdog module be used for responding to microcontroller regularly send the dog feeding signal to battery management module sends normal operating signal, battery management module be used for responding to normal operating signal carries out normal work.
Optionally, in the second operating mode, the microcontroller is further configured to enter the first operating mode when the microcontroller is abnormal, and stop sending the dog feeding signal to the watchdog module.
Optionally, in the first operating mode, the microcontroller is further configured to enter the second operating mode after the battery management module performs the operation of restoring the initialization state, and periodically send a dog feeding signal to the watchdog module.
Optionally, the microcontroller further includes a first data connection terminal, the battery management module further includes a second data connection terminal, the first data connection terminal is in communication connection with the second data connection terminal, and the microcontroller and the battery management module are configured to perform data communication through the first data connection terminal and the second data connection terminal.
Optionally, in the second operating mode, the microcontroller is further configured to enter the first operating mode when the data received by the first data connection end of the microcontroller is abnormal, and stop sending the dog feeding signal to the watchdog module.
Optionally, in the second operating mode, the microcontroller is further configured to enter the first operating mode and stop sending a dog feeding signal to the watchdog module when the first data connection end of the microcontroller does not receive the data sent by the battery management module within a second preset time period.
Optionally, the battery management circuit further includes:
and the reset control end of the microcontroller is in communication connection with the reset end of the battery management module through the signal isolation module and the watchdog module.
Optionally, the microcontroller further comprises a first data connection terminal, and the battery management module further comprises a second data connection terminal;
and the first data connecting end of the microcontroller is in communication connection with the second data connecting end of the battery management module through the signal isolation module.
Optionally, the watchdog module is connected between the signal isolation module and the reset terminal of the battery management module.
Optionally, the watchdog module is connected between the reset control end of the microcontroller and the signal isolation module.
Optionally, the signal isolation module comprises one of:
the device comprises a sound wave signal isolation module, an isolation transformer, an optical coupler, a capacitor and an electromagnetic wave signal isolation module.
On the other hand, an embodiment of the present invention further provides a control method for a battery management circuit, where the battery management circuit includes:
the microcontroller comprises a reset control end;
the battery management module comprises a reset terminal;
the reset control end of the microcontroller is in communication connection with the reset end of the battery management module through the watchdog module;
the control method of the battery management circuit comprises the following steps:
in a first working mode, the microcontroller stops sending a dog feeding signal to the watchdog module, the watchdog module sends a reset signal to the battery management module when the dog feeding signal is not received within a first preset time, and the battery management module responds to the reset signal to perform initialization state restoring operation;
under the second mode of operation, microcontroller to watchdog module regularly sends the dog feeding signal, the time interval of regularly sending the dog feeding signal is less than first predetermineeing duration, watchdog module responds to microcontroller regularly send the dog feeding signal to battery management module sends normal operating signal, battery management module responds to normal operating signal carries out normal work.
Optionally, the control method of the battery management circuit further includes:
and under the second working mode, when the microcontroller is abnormal, the microcontroller enters the first working mode, and the microcontroller stops sending a dog feeding signal to the watchdog module.
Optionally, the control method of the battery management circuit further includes:
and in the first working mode, after the battery management module performs the operation of restoring the initial state, the battery management module enters the second working mode, and the microcontroller periodically sends a dog feeding signal to the watchdog module.
Optionally, the microcontroller further includes a first data connection terminal, the battery management module further includes a second data connection terminal, the first data connection terminal is in communication connection with the second data connection terminal, and the microcontroller and the battery management module are configured to perform data communication with the second data connection terminal through the first data connection terminal;
and under the second working mode, when the data received by the first data connecting end of the microcontroller is abnormal, the microcontroller enters the first working mode, and the microcontroller stops sending a dog feeding signal to the watchdog module.
Optionally, the microcontroller further includes a first data connection terminal, the battery management module further includes a second data connection terminal, the first data connection terminal is in communication connection with the second data connection terminal, and the microcontroller and the battery management module are configured to perform data communication with the second data connection terminal through the first data connection terminal;
and under the second working mode, when the first data connecting end of the microcontroller does not receive the data sent by the battery management module within a second preset time length, the first working mode is entered, and the microcontroller stops sending a dog feeding signal to the watchdog module.
On the other hand, an embodiment of the present invention further provides a battery management system, including: at least one battery management circuit as described above.
On one hand, when the battery management module is abnormal, the microcontroller performs reset control on the battery management module through the watchdog module to restore the battery management module to an initialization state, so that the battery management module is conveniently restored to normal operation after the battery management module is restarted, and reset of the battery management module is realized. On the other hand, when the microcontroller is abnormal, the microcontroller cannot send a dog feeding signal to the watchdog module periodically, or the microcontroller stops sending the dog feeding signal to the watchdog module, so that the battery management module is reset and controlled through the watchdog module, the battery management module is restored to an initialization state, and the problem of power consumption waste caused by the fact that the battery management module is still in a working state when a battery management circuit fails due to the fact that the microcontroller is abnormal is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of a battery management circuit according to an embodiment of the present invention;
FIG. 2 is a block diagram of another battery management circuit according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of a battery management circuit according to an embodiment of the present invention.
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. 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.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
As shown in fig. 1, fig. 1 is a block diagram of a battery management circuit according to an embodiment of the present invention, and the embodiment of the present invention provides a battery management circuit, including: the microcontroller 1, the microcontroller 1 includes resetting the control end 11; the battery management module 2, the battery management module 2 includes the reset terminal 21; the reset control end 11 of the microcontroller 1 is in communication connection with the reset end 21 of the battery management module 2 through the watchdog module 3; in a first working mode, the microcontroller 1 is configured to stop sending the dog feeding signal to the watchdog module 3, the watchdog module 3 is configured to send a reset signal to the battery management module 2 when the dog feeding signal is not received within a first preset time period (that is, when the dog feeding is overtime), and the battery management module 2 is configured to perform an initialization state restoring operation in response to the reset signal.
Specifically, the watchdog module 3 includes an input terminal 31 and an output terminal 32, where the input terminal 31 is in communication connection with the reset control terminal 11 of the microcontroller 1, and the output terminal 32 is in communication connection with the reset terminal 21 of the battery management module 2, it should be noted that in the embodiment of the present invention, the communication connection refers to that a communication function can be achieved between the two terminals, and is not limited to that the two terminals of the communication connection are directly connected. The first operation mode is a mode in which the battery management module 2 is reset, and the first operation mode is returned to when the battery management circuit cannot operate normally, for example, when the microcontroller 1 is abnormal and/or the battery management module 2 is abnormal. Before entering the first working mode, the reset control terminal 11 of the microcontroller 1 periodically sends a dog feeding signal to the watchdog module 3, when entering the first working mode, the microcontroller 1 stops sending the dog feeding signal to the watchdog module 3, when the watchdog module 3 judges that the dog feeding time is out, the watchdog module 3 sends a reset signal to the battery management module 2, the dog feeding time is out, that is, the watchdog module 3 does not receive the dog feeding signal within the first preset time period, when the battery management module 2 receives the reset signal sent by the watchdog module 3, the reset control unit controls to restore the initialization state operation, so that the battery management module 2 restores to the initialization state, and then only the battery management module 2 needs to be awakened, so that the battery management module 2 can restore to normal operation, and the battery management module 2 is reset is realized, at this time, the microcontroller 1 can also perform targeted parameter configuration on the battery management module 2 in a communication form, if not, the battery management module 2 can operate according to the default configuration.
In the battery management circuit in the embodiment of the invention, on one hand, when the battery management module 2 is abnormal, the microcontroller 1 performs reset control on the battery management module 2 through the watchdog module 3, so that the battery management module 2 is restored to the initialization state, and the battery management module 2 is conveniently restored to normal operation after the battery management module 2 is restarted, so that the reset of the battery management module 2 is realized, in the reset process of the battery management module 2, the microcontroller 1 does not need to be reset at the same time, and no adverse effect is generated on the operation of the microcontroller 1, for example, in the reset process of the battery management module 2, the microcontroller 1 can still maintain communication with other modules or a superior control system, and the influence on the whole battery management system is small. On the other hand, when the microcontroller 1 is abnormal, the microcontroller 1 cannot send a dog feeding signal to the watchdog module 3 periodically, or the microcontroller 1 stops sending the dog feeding signal to the watchdog module 3, so that the reset control of the battery management module 2 through the watchdog module 3 is realized, the battery management module 2 is restored to an initialization state, and the problem of power consumption waste caused by the fact that the battery management module 2 is still in a working state when the battery management circuit fails due to the abnormality of the microcontroller 1 is avoided.
Optionally, in the second operating mode, the microcontroller 1 is configured to periodically send a dog feeding signal to the watchdog module 3, a time interval of the periodic dog feeding signal sending is less than the first preset time duration, the watchdog module 3 is configured to send a normal operating signal to the battery management module 2 in response to the dog feeding signal periodically sent by the microcontroller 1, and the battery management module 2 is configured to perform normal operation in response to the normal operating signal.
Specifically, under the second operating mode, microcontroller 1 controls battery management module 2 through watchdog module 3 and normally works, and under first operating mode, microcontroller 1 controls battery management module 2 through watchdog module 3 and carries out the operation of restoring the initial state to realize resetting of battery management module 2 after awakening up.
Optionally, in the second operating mode, the microcontroller 1 is further configured to enter the first operating mode when the microcontroller is abnormal, and stop sending the dog feeding signal to the watchdog module 3.
Specifically, on the one hand, when the microcontroller 1 determines that the microcontroller itself is abnormal, the above first operating mode is entered, so as to control the battery management module 2 to return to the initialization state through the watchdog module 3, thereby avoiding the problem of power consumption waste caused by the battery management module 2 still being in the operating state when the battery management circuit is failed due to the abnormality of the microcontroller 1. After the abnormality of the microcontroller 1 is eliminated, the microcontroller 1 enters the second working mode, and the microcontroller 1 restarts to periodically send a dog feeding signal to the watchdog module 3 to control the watchdog module 3 to send a normal working signal to the battery management module 2, so as to control the battery management module 2 to normally work. On the other hand, when the microcontroller 1 is abnormal and the feeding signal cannot be sent to the watchdog module 3 periodically, the feeding overtime can be caused, namely, the first working mode is entered, when the watchdog module 3 judges that the feeding is overtime, the reset signal can be sent to the battery management module 2, the battery management module 2 is controlled to be restored to the initialization state, and the problem of power consumption waste caused by the fact that the battery management module 2 is still in the working state when the microcontroller 1 is abnormal and the battery management circuit fails is avoided. After the abnormality of the microcontroller 1 is eliminated, the microcontroller 1 enters the second working mode, and the microcontroller 1 restarts to periodically send a dog feeding signal to the watchdog module 3 to control the watchdog module 3 to send a normal working signal to the battery management module 2, so as to control the battery management module 2 to normally work.
Optionally, in the first operating mode, the microcontroller 1 is further configured to enter the second operating mode after the battery management module 2 performs the initialization state restoring operation, and periodically send a dog feeding signal to the watchdog module 3.
Specifically, when the battery management module 2 is abnormal, in the first operating mode, the microcontroller 1 stops sending the dog feeding signal to the watchdog module 3, so as to control the battery management module 2 to return to the initialization state through the watchdog module 3, since the microcontroller 1 itself has no abnormality, it is necessary to control the battery management module 2 to be reset, when the microcontroller 1 judges that the time length for stopping sending the dog feeding signal to the watchdog module 3 reaches a certain condition, the condition satisfied by the duration is required to ensure that the battery management module has completed the operation of restoring the initialization state, enters the second operating mode, namely, the regular sending of the feeding dog signal to the watchdog module 3 is restarted, so that the watchdog module 3 sends a normal working signal to the battery management module 2, thereby controlling the battery management module 2 to recover to a normal working state and realizing the reset. In addition, it may also be that the battery management module 2 is normal, but when other modules are abnormal, for example, the microcontroller 1 is abnormal, the first operating mode is also entered, the microcontroller 1 stops sending the dog feeding signal to the watchdog module 3, so as to control the battery management module 2 to return to the initialization state through the watchdog module 3, when the microcontroller 1 determines that the duration of stopping sending the dog feeding signal to the watchdog module 3 reaches a certain condition, the condition met by the duration needs to ensure that the battery management module has completed the initialization state operation, the second operating mode is entered, that is, the regular sending of the dog feeding signal to the watchdog module 3 is restarted, so that the watchdog module 3 sends the normal operating signal to the battery management module 2, thereby controlling the battery management module 2 to return to the normal operating state, and implementing the reset.
Optionally, the microcontroller 1 further includes a first data connection terminal 12, the battery management module 2 further includes a second data connection terminal 22, the first data connection terminal 12 is in communication connection with the second data connection terminal 22, and the microcontroller 1 and the battery management module 2 are configured to perform data communication with the second data connection terminal 22 through the first data connection terminal 12.
Optionally, in the second operating mode, the microcontroller 1 is further configured to enter the first operating mode when the data received by the first data connection terminal 12 of the microcontroller 1 is abnormal, and stop sending the dog feeding signal to the watchdog module 3.
Specifically, the microcontroller 1 may determine whether the battery management module 2 is abnormal according to the received data of the battery management module 2, for example, if the microcontroller 1 determines that the received data sent by the battery management module 2 is not the required data, it indicates that the battery management module 2 is out of control and the battery management module 2 needs to be reset, so that the above-mentioned first operating mode is entered.
Optionally, in the second operating mode, the microcontroller 1 is further configured to enter the first operating mode and stop sending the dog feeding signal to the watchdog module 3 when the first data connection end 12 of the microcontroller 1 does not receive the data sent by the battery management module 2 within a second preset time period.
Specifically, the microcontroller 1 may further determine whether the battery management module 2 is abnormal according to a communication condition between the first data connection end 12 and the second data connection end 22, for example, after the microcontroller 1 sends a control instruction, it should theoretically receive data sent by the battery management module 2 within a certain time period, so that if the microcontroller 1 determines that the data sent by the battery management module 2 is not received within a second preset time period, it indicates that the battery management module 2 is out of control, and the battery management module 2 needs to be reset, so that the first operating mode is entered.
Optionally, the battery management circuit further comprises: the signal isolation module 4 and the reset control terminal 11 of the microcontroller 1 are in communication connection with the reset terminal 21 of the battery management module 2 through the signal isolation module 4 and the watchdog module 3.
Specifically, generally, the battery management module 2 is mainly used to collect battery data and therefore needs to be disposed on the high-voltage side of the power supply, and the microcontroller 1 is mainly used to implement communication or control functions and therefore needs to be disposed on the low-voltage side of the power supply, so that the signal isolation module 4 needs to be disposed between the microcontroller 1 and the battery management module 2 to implement electrical isolation between the microcontroller 1 and the battery management module 2, and communication transmission is performed on the premise of electrical isolation, for example, communication transmission is performed on the premise of electrical isolation on a reset control related signal between the microcontroller 1 and the battery management module 2.
Optionally, the microcontroller 1 further comprises a first data connection 12, and the battery management module 2 further comprises a second data connection 22; the first data connection end 12 of the microcontroller 1 is in communication connection with the second data connection end 22 of the battery management module 2 through the signal isolation module 4, that is, data transmission between the microcontroller 1 and the battery management module 2 needs to be performed communication transmission under the premise of electrical isolation.
Alternatively, the watchdog module 3 is connected between the signal isolation module 4 and the reset terminal 21 of the battery management module 2, i.e. the watchdog module 3 may be located on the high voltage side of the power supply.
Alternatively, as shown in fig. 2 which is a block diagram of another battery management circuit in the embodiment of the present invention, the watchdog module 3 is connected between the reset control terminal 11 of the microcontroller 1 and the signal isolation module 4, that is, the watchdog module 3 may be located on the low voltage side of the power supply.
It should be noted that, no matter the watchdog module 3 is located at the high-voltage side or the low-voltage side of the power supply, the working method of the battery management circuit is similar, and the differences include that, as shown in fig. 1, when the watchdog module 3 is located at the high-voltage side of the power supply, the dog feeding signal sent to the watchdog module 3 by the microcontroller 1 is a signal transmitted by the signal isolation module 4, and the watchdog module 3 directly transmits a reset signal or a normal working signal to the battery management module 2; as shown in fig. 2, when the watchdog module 3 is located on the low voltage side of the power supply, the microcontroller 1 directly sends a dog feeding signal to the watchdog module 3, and the reset signal or the normal operating signal sent by the watchdog module 3 to the battery management module 2 is a signal transmitted by the signal isolation module 4. When the watchdog module 3 is located on the high-voltage side of the power supply, on one hand, if the isolator 4 fails, the problem of output level maintenance occurs, so that normal regular dog feeding cannot be realized, and if the watchdog module 3 judges that the dog feeding is overtime, a reset signal is sent to the battery management module 2, so that the battery management module 2 is restored to an initialization state, and power consumption can be saved; on the other hand, the environment of the high-voltage side is complex, the requirement on the stability of the watchdog module 3 is high, so that the watchdog module 3 is prone to failure and poor in reliability. When the watchdog module 3 is located on the low-voltage side of the power supply, on one hand, if the isolator 4 fails, the problem of output level maintenance occurs, so that even if the watchdog module 3 judges that the feeding dog is overtime, the isolator 4 does not change the output level, and the battery management module 2 cannot be controlled to return to the initialization state when the isolator 4 fails, thereby wasting power consumption; on the other hand, because the environment of low pressure side is more stable, and the stability requirement to watchdog module 3 is lower, consequently watchdog module 3 is difficult to break down, and the reliability is better.
Optionally, the signal isolation module 4 comprises one of: the device comprises a sound wave signal isolation module, an isolation transformer, an optical coupler, a capacitor and an electromagnetic wave signal isolation module. The principle or structure of the signal isolation module 4 is not limited in the embodiments of the present invention, for example, an acoustic wave signal isolation module that implements signal isolation transmission by using an ultrasonic wave, an isolation transformer that implements signal isolation transmission by using a magnetic field, an optical coupler that implements signal isolation transmission by using an optical form, a capacitor that implements signal isolation transmission by using an electric field, and an electromagnetic wave signal isolation module that implements signal isolation transmission by using an electromagnetic wave form.
An embodiment of the present invention further provides a control method for a battery management circuit, which can be used in the above battery management circuit, where the battery management circuit includes: the microcontroller 1, the microcontroller 1 includes resetting the control end 11; the battery management module 2, the battery management module 2 includes the reset terminal 21; the reset control end 11 of the microcontroller 1 is in communication connection with the reset end 21 of the battery management module 2 through the watchdog module 3; as shown in fig. 3, fig. 3 is a flowchart of a method for controlling a battery management circuit according to an embodiment of the present invention, where the method for controlling the battery management circuit includes:
102, stopping sending a dog feeding signal to the watchdog module 3 by the microcontroller 1;
103, when the watchdog module 3 does not receive the watchdog feeding signal within the first preset time, the watchdog module 3 sends a reset signal to the battery management module 2;
in step 104, the battery management module 2 performs an operation of restoring the initialized state in response to the reset signal.
In the control method of the battery management circuit in the embodiment of the invention, on one hand, when the battery management module 2 is abnormal, the microcontroller 1 performs reset control on the battery management module 2 through the watchdog module 3, so that the battery management module 2 is restored to the initialization state, and the battery management module 2 is conveniently restored to normal operation after the battery management module 2 is restarted, so that the reset of the battery management module 2 is realized, and in the reset process of the battery management module 2, the microcontroller 1 does not need to be reset at the same time, and no adverse effect is generated on the operation of the microcontroller 1, for example, in the reset process of the battery management module 2, the microcontroller 1 can still maintain communication with other modules or a superior control system, and the influence on the whole battery management system is small. On the other hand, when the microcontroller 1 is abnormal, the microcontroller 1 cannot send a dog feeding signal to the watchdog module 3 periodically, or the microcontroller 1 stops sending the dog feeding signal to the watchdog module 3, so that the reset control of the battery management module 2 through the watchdog module 3 is realized, the battery management module 2 is restored to an initialization state, and the problem of power consumption waste caused by the fact that the battery management module 2 is still in a working state when the battery management circuit fails due to the abnormality of the microcontroller 1 is avoided.
Optionally, the control method of the battery management circuit further includes:
firstly, initially powering up, and then entering step 001;
step 004, the battery management module 2 responds to the normal operation signal to perform normal operation.
Optionally, the control method of the battery management circuit further includes: in the second working mode, when the microcontroller 1 itself is abnormal, the step 101 is entered, the first working mode is entered, then the step 102 is entered, and the microcontroller stops sending the dog feeding signal to the watchdog module.
Optionally, the control method of the battery management circuit further includes: in the first operating mode, after the battery management module 2 performs the reset initialization state operation in step 104, the process proceeds to step 001, the process proceeds to the second operating mode, and then the process proceeds to step 002, and the microcontroller 1 periodically sends a dog feeding signal to the watchdog module 3.
Optionally, the microcontroller 1 further includes a first data connection terminal 12, the battery management module 2 further includes a second data connection terminal 22, the first data connection terminal 12 is in communication connection with the second data connection terminal 22, and the microcontroller 1 and the battery management module 2 are configured to perform data communication with the second data connection terminal 22 through the first data connection terminal 12; in the second working mode, when the data received by the first data connection end 12 of the microcontroller 1 is abnormal, the method enters step 101, the first working mode is entered, the step 102 is entered, and the microcontroller 1 stops sending the dog feeding signal to the watchdog module 3.
Optionally, the microcontroller 1 further includes a first data connection terminal 12, the battery management module 2 further includes a second data connection terminal 22, the first data connection terminal 12 is in communication connection with the second data connection terminal 22, and the microcontroller 1 and the battery management module 2 are configured to perform data communication with the second data connection terminal 22 through the first data connection terminal 12; in the second working mode, when the first data connection end of the microcontroller 1 does not receive the data sent by the battery management module 2 within the second preset time period, the step 101 is entered, the first working mode is entered, the step 102 is entered, and the microcontroller 1 stops sending the dog feeding signal to the watchdog module 3.
It should be noted that the specific operating principle and process of the battery management circuit in the embodiment of the present invention are the same as those in the above embodiment, and are not described herein again. In addition, for the first preset duration and the second preset duration, except for the requirement of the first preset duration and the second preset duration in the above scheme, for example, a time interval for periodically sending the dog feeding signal is less than the first preset duration.
An embodiment of the present invention further provides a battery management system, including: at least one battery management circuit as described above.
The specific structure and principle of the battery management circuit are the same as those of the above embodiments, and are not described herein again.
Specifically, for example, when the battery management system includes a plurality of battery management circuits, each battery management circuit has a separate microcontroller, a battery management module and a watchdog module, and therefore, the reset process of the battery management module is controlled by the microcontroller and the watchdog module in the respective battery management system, and the normal operation of other circuits is not affected.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (12)
1. A battery management circuit, comprising:
the microcontroller comprises a reset control end;
the battery management module comprises a reset terminal;
the reset control end of the microcontroller is in communication connection with the reset end of the battery management module through the watchdog module;
in a first working mode, the microcontroller is configured to stop sending a dog feeding signal to the watchdog module, the watchdog module is configured to send a reset signal to the battery management module when the watchdog module does not receive the dog feeding signal within a first preset time period, and the battery management module is configured to perform an initialization state restoring operation in response to the reset signal;
under the second mode of operation, microcontroller be used for to watchdog module regularly sends the dog feeding signal, the time interval of regularly sending the dog feeding signal is less than first predetermineeing duration, watchdog module be used for responding to microcontroller regularly send the dog feeding signal to battery management module sends normal operating signal, battery management module be used for responding to normal operating signal carries out normal work.
2. The battery management circuit of claim 1,
and under the second working mode, the microcontroller is also used for entering the first working mode and stopping sending the dog feeding signal to the watchdog module when the microcontroller is abnormal.
3. The battery management circuit of claim 1,
in the first working mode, the microcontroller is further configured to enter the second working mode after the battery management module performs an initialization state restoring operation, and periodically send a dog feeding signal to the watchdog module.
4. The battery management circuit of claim 1,
the microcontroller further comprises a first data connecting end, the battery management module further comprises a second data connecting end, the first data connecting end is in communication connection with the second data connecting end, and the microcontroller and the battery management module are used for data communication through the first data connecting end and the second data connecting end.
5. The battery management circuit of claim 4,
in the second working mode, the microcontroller is further configured to enter the first working mode when the data received by the first data connection end of the microcontroller is abnormal, and stop sending a dog feeding signal to the watchdog module;
and under the second working mode, the microcontroller is further used for entering the first working mode and stopping sending a dog feeding signal to the watchdog module when a first data connecting end of the microcontroller does not receive the data sent by the battery management module within a second preset time.
6. The battery management circuit of claim 1, further comprising:
the reset control end of the microcontroller is in communication connection with the reset end of the battery management module through the signal isolation module and the watchdog module;
the microcontroller also comprises a first data connecting end, and the battery management module also comprises a second data connecting end;
and the first data connecting end of the microcontroller is in communication connection with the second data connecting end of the battery management module through the signal isolation module.
7. The battery management circuit of claim 6,
the watchdog module is connected between the signal isolation module and the reset end of the battery management module
Or the watchdog module is connected between the reset control end of the microcontroller and the signal isolation module.
8. A control method for a battery management circuit, the control method being used in the battery management circuit according to any one of claims 1 to 7, the control method comprising:
in a first working mode, the microcontroller stops sending a dog feeding signal to the watchdog module, the watchdog module sends a reset signal to the battery management module when the dog feeding signal is not received within a first preset time, and the battery management module responds to the reset signal to perform initialization state restoring operation;
under the second mode of operation, microcontroller to watchdog module regularly sends the dog feeding signal, the time interval of regularly sending the dog feeding signal is less than first predetermineeing duration, watchdog module responds to microcontroller regularly send the dog feeding signal to battery management module sends normal operating signal, battery management module responds to normal operating signal carries out normal work.
9. The method of controlling a battery management circuit according to claim 8, further comprising:
and under the second working mode, when the microcontroller is abnormal, the microcontroller enters the first working mode, and the microcontroller stops sending a dog feeding signal to the watchdog module.
10. The method of controlling a battery management circuit according to claim 9, further comprising:
and in the first working mode, after the battery management module performs the operation of restoring the initial state, the battery management module enters the second working mode, and the microcontroller periodically sends a dog feeding signal to the watchdog module.
11. The control method of a battery management circuit according to claim 9,
the microcontroller further comprises a first data connecting end, the battery management module further comprises a second data connecting end, the first data connecting end is in communication connection with the second data connecting end, and the microcontroller and the battery management module are used for performing data communication with the second data connecting end through the first data connecting end;
under the second working mode, when the data received by the first data connecting end of the microcontroller is abnormal, the first working mode is entered, and the microcontroller stops sending a dog feeding signal to the watchdog module;
and under the second working mode, when the first data connecting end of the microcontroller does not receive the data sent by the battery management module within a second preset time length, the first working mode is entered, and the microcontroller stops sending a dog feeding signal to the watchdog module.
12. A battery management system, comprising:
at least one battery management circuit as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810701477.0A CN110661043A (en) | 2018-06-29 | 2018-06-29 | Battery management circuit, control method thereof and battery management system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810701477.0A CN110661043A (en) | 2018-06-29 | 2018-06-29 | Battery management circuit, control method thereof and battery management system |
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| CN110661043A true CN110661043A (en) | 2020-01-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112256468A (en) * | 2020-10-26 | 2021-01-22 | 华能国际电力开发公司吉林白城风电分公司 | Online anemometer watchdog system |
| CN114865114A (en) * | 2022-04-20 | 2022-08-05 | 广东汇天航空航天科技有限公司 | Battery management system and control method thereof |
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Application publication date: 20200107 |