CN113696779A - Battery pack monitoring method and system, automobile and computer equipment - Google Patents
Battery pack monitoring method and system, automobile and computer equipment Download PDFInfo
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- CN113696779A CN113696779A CN202010441475.XA CN202010441475A CN113696779A CN 113696779 A CN113696779 A CN 113696779A CN 202010441475 A CN202010441475 A CN 202010441475A CN 113696779 A CN113696779 A CN 113696779A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000005070 sampling Methods 0.000 claims description 23
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 230000007958 sleep Effects 0.000 description 12
- 230000006870 function Effects 0.000 description 4
- 230000002618 waking effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005059 dormancy Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention discloses a battery pack monitoring method, a system, an automobile and computer equipment, wherein the method comprises the following steps: when a battery management module connected with a battery pack is monitored to be in a dormant state, acquiring the voltage of at least one temperature sensor arranged in the battery pack in real time; when the voltage of any one temperature sensor is monitored to exceed a preset awakening voltage threshold value, awakening the battery management module in the dormant state; the battery management module which is awakened acquires the real-time temperature of the temperature sensor with the voltage exceeding the preset awakening voltage threshold value, and prompts the thermal runaway alarm information of the battery pack when the real-time temperature exceeds the preset alarm temperature value or the temperature rise rate of the real-time temperature exceeds the preset alarm temperature rise rate. The invention can realize 24-hour all-weather monitoring of the battery pack, and can monitor thermal runaway of the battery pack in time even when an automobile using the battery pack is in a flameout and parking state, thereby reducing the monitoring cost and ensuring the safety of the battery.
Description
Technical Field
The invention relates to the technical field of battery safety, in particular to a battery pack monitoring method and system, an automobile and computer equipment.
Background
At present, power batteries are widely applied in various fields, and safety problems are always the first concern in the use process of the power batteries. However, in a special time period when a device carrying a power battery (such as a power battery in an electric vehicle) is temporarily stopped, the power battery is often in an unsupervised state (for example, after the power battery in the electric vehicle is shut down and parked in a parking lot, the power battery in the electric vehicle is in an unsupervised state), and at this time, if a heating system in a battery pack fails, a battery pack may be in an extremely dangerous state, and liquid leakage, short circuit, and fire may be caused at any time, so that danger is generated and people or property loss is brought.
Disclosure of Invention
The embodiment of the invention provides a battery pack monitoring method and system, an automobile and computer equipment, which can realize 24-hour all-weather automatic monitoring on a power battery and solve the problem that the power battery is unsupervised in a special time period.
A battery pack monitoring method, comprising:
when a battery management module connected with the battery pack is monitored to be in a dormant state, acquiring the voltage of at least one temperature sensor arranged in the battery pack in real time; the distance between the temperature sensor and the explosion-proof valve of the battery pack is smaller than a preset distance;
when the voltage of any one of the temperature sensors is monitored to exceed a preset awakening voltage threshold value, awakening the battery management module in a dormant state;
the battery management module which is awakened acquires the real-time temperature of the temperature sensor, the voltage of which exceeds a preset awakening voltage threshold value, and prompts the thermal runaway alarm information of the battery pack when the real-time temperature exceeds a preset alarm temperature value or the temperature rise rate of the real-time temperature exceeds a preset alarm temperature rise rate.
A battery pack monitoring system comprises a controller and a battery management module connected with the battery pack and the controller, wherein all temperature sensors in the battery pack are in communication connection with the controller, and the controller is used for executing the battery pack monitoring method.
An automobile comprises a battery pack and the battery pack monitoring system.
A computer device comprising a memory, a processor, and computer readable instructions stored in the memory and executable on the processor, the processor implementing the battery pack monitoring method when executing the computer readable instructions.
When the battery pack monitoring method, the battery pack monitoring system, the automobile and the computer equipment provided by the invention monitor that the battery management module connected with the battery pack is in a dormant state, the dormant battery management module (the battery management module can be a battery management system, namely a battery management control, abbreviated as BMS) can be awakened by monitoring the voltage of at least one temperature sensor (namely, at least one monitoring point) in the battery pack, the battery management module can determine the real-time temperature of the corresponding monitoring point (namely, the monitoring point where the temperature sensor is located) in the battery pack according to the voltage of the temperature sensor, and further judge the thermal runaway of the battery pack, when the thermal runaway event with abnormal temperature is determined, the thermal runaway alarm information is prompted, so that an owner or a passenger and the like can take emergency measures according to the thermal runaway alarm information, and serious personal and property safety caused by thermal runaway is avoided. The process of the invention can realize 24-hour all-weather monitoring of the battery pack (even in a special time period when the battery management module is in a dormant state), and even when an automobile using the battery pack is in a flameout and parking state, the battery pack can still be monitored in time to realize thermal runaway, and prompt warning information of the thermal runaway, thereby ensuring the safety of the battery. Meanwhile, the invention realizes the 24-hour monitoring and alarming function, the dormancy current is only about 1mA, the power consumption is extremely low, and the monitoring cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.
FIG. 1 is a flow chart of a battery pack monitoring method according to an embodiment of the invention;
FIG. 2 is a functional block diagram of a battery pack monitoring system in accordance with an embodiment of the present invention;
fig. 3 is a schematic diagram of a circuit configuration of a part of a battery pack monitoring system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a computer device in an embodiment of the invention.
Detailed Description
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, 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 invention provides a method for monitoring a battery pack 1, which comprises the following steps as shown in figures 1 and 2:
s10, when the battery management module 2 connected with the battery pack 1 is monitored to be in a dormant state, acquiring the voltage of at least one temperature sensor 11 arranged in the battery pack 1 in real time; the distance between the temperature sensor 11 and the explosion-proof valve of the battery pack 1 is less than a preset distance; understandably, the battery management module 2 is in a dormant state, which represents that the battery management module is in an energy-saving state, so that detection and early warning are not performed when the battery pack 1 is in thermal runaway, in the present invention, it is necessary to determine whether the thermal runaway may occur by detecting the voltage of the temperature sensor 11 near the explosion-proof valve of the battery pack 1 (the distance from the explosion-proof valve is less than a preset distance, which may be set according to requirements, for example, if the number of the temperature sensors 11 arranged in the battery pack 1 is one, the distance between the temperature sensor 11 and the explosion-proof valve is less than a preset distance of 5 mm); understandably, when thermal runaway occurs in any electric core in the battery pack 1, the generated high-temperature gas can be discharged through the explosion-proof valve, therefore, no matter where the electric core of the whole battery pack 1 is in thermal runaway, the temperature at the explosion-proof valve can be obviously raised, therefore, the interval between the set temperature sensor 11 and the explosion-proof valve is smaller than the preset distance (namely the position which is the most likely to be obviously raised when thermal runaway), the association probability of the voltage of the temperature sensor 11 of the battery management module 2 which is subsequently used for awakening the dormancy and the possibility that the thermal runaway actually occurs in the battery pack 1 can be raised, and false awakening is avoided as much as possible. Preferably, the Temperature sensor 11 assumed in the battery pack 1 is an NTC (Negative Temperature Coefficient thermistor) type Temperature sensor 11, and in the present invention, the battery management module 2 is externally connected to each Temperature sensor 11 in the battery pack 1 through a wire harness, so as to accurately and rapidly acquire the voltage of the Temperature sensor 11; through the temperature sensor 11, the wire harness and the battery management module 2, a set of alarm device with extremely low cost is formed.
S20, when the voltage of any one of the temperature sensors 11 is monitored to exceed a preset wake-up voltage threshold, waking up the battery management module 2 in the sleep state; understandably, when the temperature of any one of the temperature sensors 11 in the battery pack 1 rises due to thermal runaway of the battery pack 1, the voltage of the temperature sensor 11 rises with the rise of the temperature, and then when the voltage of the temperature sensor 11 exceeds a preset wake-up voltage threshold, the battery management module 2 in the sleep state can be directly woken up.
S30, acquiring the real-time temperature of the temperature sensor 11 with the voltage exceeding the preset awakening voltage threshold value through the awakened battery management module 2, and prompting the thermal runaway alarm information of the battery pack 1 when the real-time temperature exceeds the preset alarm temperature value or the temperature rise rate of the real-time temperature exceeds the preset alarm temperature rise rate. That is, after being awaken from the sleep state, the battery management module 2 collects signals such as voltage and temperature in the whole battery pack 1, comprehensively judges whether the temperature at the temperature sensor 11 is abnormal (the real-time temperature exceeds a preset alarm temperature value or the temperature rise rate of the real-time temperature exceeds a preset alarm temperature rise rate), further determines whether the battery pack 1 is out of control, and prompts the whole automobile when the out of control occurs, the thermal out of control alarm information of the battery pack 1 of the automobile is provided, further, the whole automobile can send an alarm signal to the outside, passengers are reminded or the automobile owner is remotely reminded, emergency measures are taken in time, and serious personal and property safety caused by the out of control is avoided.
In the monitoring method of the battery pack 1 according to the above embodiment of the present invention, when it is monitored that the battery management module 2 connected to the battery pack 1 is in a sleep state, the battery management module 2 that is in sleep state can be waken up by monitoring the voltage of at least one temperature sensor 11 (i.e. at least one monitoring point) in the battery pack 1 (the battery management module 2 may be a battery management system, i.e. battery management control, abbreviated as BMS), the battery management module 2 can determine the real-time temperature of the corresponding monitoring point (i.e. the monitoring point where the temperature sensor 11 is located) in the battery pack 1 according to the voltage of the temperature sensor 11, and further determine the thermal runaway of the battery pack 1, and when it is determined that a thermal runaway event with abnormal temperature occurs, prompt a thermal runaway alarm message, so that an owner or a passenger can take an emergency measure according to the thermal runaway alarm message, avoid the thermal runaway to cause serious personal and property safety. The process of the invention can realize 24-hour all-weather monitoring of the battery pack 1 (even if the battery management module 2 is in the dormant state in a special time period, the battery management module is in the dormant state at the time), and even if an automobile using the battery pack 1 is in a flameout and parking state, the battery pack 1 can still be monitored in time for thermal runaway and prompt thermal runaway alarm information, thereby ensuring the safety of the battery. Meanwhile, the invention realizes the 24-hour monitoring and alarming function, the dormancy current is only about 1mA, the power consumption is extremely low, and the monitoring cost is reduced.
In an embodiment, after the acquiring, by the battery management module 2 being woken up, the real-time temperature of the temperature sensor 11 whose voltage exceeds a preset wake-up voltage threshold, the method further includes:
when the real-time temperature does not exceed the preset alarm temperature value and the temperature rise rate of the real-time temperature does not exceed the preset alarm temperature rise rate, the real-time temperature of the battery pack 1 is confirmed to be in a normal state and the battery management module 2 is mistakenly awakened, and the battery management module 2 is controlled to enter the dormant state again.
In this embodiment, through awakened battery management module 2, according to the voltage of temperature sensor 11 exceeding the preset awakening voltage threshold value and the voltage and temperature signals collected by battery management module 2 in the whole battery pack 1, the real-time temperature of temperature sensor 11 is determined first, and then, if it is determined that the real-time temperature of battery pack 1 is in the normal state, it is determined that battery management module 2 is awakened by mistake, and then, it is necessary to make battery management module 2 enter the sleep state again at this time, so as to save energy (the sleep current of battery management module 2 is only about 1mA, and the power consumption is extremely low).
In an embodiment, the method further comprises:
when monitoring that a battery management module 2 connected with the battery pack 1 is not in a dormant state, the battery management module 2 which is not in the dormant state acquires the real-time temperature of the temperature sensor 11, the voltage of which exceeds a preset awakening voltage threshold value, and prompts thermal runaway alarm information of the battery pack 1 when the real-time temperature exceeds a preset alarm temperature value or the temperature rise rate of the real-time temperature exceeds a preset alarm temperature rise rate.
That is, when the battery management module 2 is not in the sleep state (for example, when the vehicle is in the driving process), at this time, the battery management module 2 does not need to be waken up, the voltage of each temperature sensor 11 is directly acquired through the battery management module 2 which is already in the working state (not in the sleep state), and when it is determined that the voltage of any one of the temperature sensors 11 exceeds the preset wakening voltage threshold, the real-time temperature of the temperature sensor 11 is determined through the voltage of the temperature sensor 11 which exceeds the preset wakening voltage threshold, and signals such as the voltage and the temperature in the whole battery pack 1 collected by the battery management module 2. When the real-time temperature exceeds a preset alarm temperature value or the temperature rise rate of the real-time temperature exceeds a preset alarm temperature rise rate, prompting thermal runaway alarm information of the battery pack 1; if the real-time temperature of the battery pack 1 is determined to be in a normal state, the working state of the battery pack 1 is considered to be normal at this time, thermal runaway is not generated, and at this time, the voltage of each temperature sensor 11 is continuously obtained again.
In one embodiment, as shown in fig. 2, the battery management module 2 includes an MCU23, a sampling unit 22, and a wake-up unit 21; the sampling unit 22 is connected with the awakening unit 21; the number of the sampling units 22 and the number of the wake-up units 21 are the same as the number of the temperature sensors 11, and each temperature sensor 11 is connected with the MCU23 through one sampling unit 22 and one wake-up unit 21 respectively; that is, in the present invention, one or more temperature sensors 11 are disposed in the battery pack 1, and each temperature sensor 11 is connected to an independent sampling unit 22 and a wake-up unit 21, and is connected to the MCU23 through the sampling unit 22 and the wake-up unit 21 connected thereto; therefore, when a plurality of temperature sensors 11 are arranged in the battery pack 1 (for example, two or more temperature sensors 11 are arranged, and at least one temperature sensor 11 is arranged around the explosion-proof valve in an attached manner), the real-time temperature corresponding to the voltage of the monitoring point corresponding to each temperature sensor 11 can be independently monitored, and then, through the detection of the plurality of temperature sensors 11, the judgment and warning of whether the thermal runaway occurs in the battery pack 1 can be more accurate. Preferably, the battery management module 2 includes a power supply interface 24 and a CAN interface 25, and the battery pack 1 is connected to the battery management module 2 through the power supply interface 24 and the CAN interface 25. The battery pack 1 is provided with a whole-pack low-voltage interface 12, and the battery pack 1 is connected with the power supply interface 24 and the CAN interface 25 through the whole-pack low-voltage interface 12. The battery management module 2 supplies power to the battery pack 1 at low voltage through the power supply interface 24 and the whole-pack low-voltage interface 12, and the CAN interface 25 is used for transmitting signals of the battery pack 1 and the battery management module 2.
When the voltage of any one of the temperature sensors 11 is monitored to exceed a preset wake-up voltage threshold, waking up the battery management module 2 in a dormant state, including:
when any one of the wake-up units 21 monitors that the voltage of the temperature sensor 11 exceeds a preset wake-up voltage threshold, waking up the MCU23 in a sleep state;
through awakening battery management module 2 obtains the real-time temperature that voltage surpassed preset awakening voltage threshold value temperature sensor 11, and when the real-time temperature surpassed preset alarm temperature value or the temperature rise rate of real-time temperature surpassed preset alarm temperature rise rate, the warning information of thermal runaway of battery package 1 is reminded, including:
through with awakening unit 21 is connected sampling unit 22 obtains the voltage that exceeds preset awakening voltage threshold value temperature sensor 11 and exports it to MCU23, MCU23 confirms according to the received voltage of temperature sensor 11 the real-time temperature of temperature sensor 11, and when the real-time temperature exceeds preset alarm temperature value or the temperature rise rate of real-time temperature exceeds preset alarm rate, confirm that the real-time temperature of battery package 1 is in abnormal state, and the suggestion contains the thermal runaway alarm information of battery package 1 of abnormal state.
The invention adopts the mode that the awakening unit 21 is directly added on the battery management module 2 to awaken the MCU23 in the dormant state; meanwhile, a sampling unit 22 is directly added to the battery management module 2, and is used for prompting thermal runaway alarm information of the battery pack 1 including the abnormal state when the real-time temperature exceeds a preset alarm temperature value or the temperature rise rate of the real-time temperature exceeds a preset alarm temperature rise rate, so as to realize alarm; furthermore, the temperature sensor 11 is additionally arranged in the battery pack 1, so that a set of wake-up alarm device with extremely low cost can be formed, and 24-hour real-time safety monitoring of the battery pack 1 is realized.
In one embodiment, as shown in fig. 3, the battery management module includes a first resistor R1, an input terminal of the first resistor R1 is connected to a power supply 3 (the power supply 3 is preferably a 5VH power supply), and an output terminal of the first resistor R1 is connected to a first terminal of the temperature sensor 11; the second end of the temperature sensor 11 is grounded;
the wake-up unit 21 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a comparator 211; the input terminal of the second resistor R2 is connected to the first power supply path between the first resistor R1 and the temperature sensor 11; the input end of the third resistor R3 is connected with a power supply 3, the output end of the third resistor R3 is connected with the input end of a fourth resistor R4, and the output end of the fourth resistor R4 is grounded; a first input end of the comparator 211 is connected to an output end of the second resistor R2; a second input terminal of the comparator 211 is connected to a second supply path between the third resistor R3 and the fourth resistor R4; the output end of the comparator 211 is connected with the input end of a fifth resistor R5, and the output end of the fifth resistor R5 is connected with the MCU 23;
when any one of the wakeup units 21 monitors that the voltage of the temperature sensor 11 exceeds a preset wakeup voltage threshold, waking up the MCU23 in the sleep state includes:
the comparator 211 in the wake-up unit 21 receives the voltage of the temperature sensor 11 obtained in real time from the first power supply path through the first input end, and compares the voltage of the temperature sensor 11 with a preset wake-up voltage threshold obtained in real time from the second power supply path;
when the voltage of the temperature sensor 11 exceeds a preset wake-up voltage threshold, the comparator 211 outputs a low level to wake up the MCU23 in a sleep state through the output low level.
In this embodiment, the wake-up unit 21 outputs a low level that enables the MCU23 to be woken up using the comparator 211. That is, when the real-time temperature measured by the temperature sensor 11 increases, which causes the voltage of the temperature sensor 11 to increase (decrease in resistance), after it is determined by the comparator 211 that the voltage of the temperature sensor 11 at this time exceeds the preset wake-up voltage threshold (the preset wake-up voltage threshold is determined by the third resistor R3 and the fourth resistor R4 in the wake-up unit 21), at this time, a low level is output to the MCU23 through the wakeup pin 212 (the MCU23 is connected to the wake-up unit 21 through the wakeup pin 212), so as to wake up the MCU23 through the low level. Understandably, since the wake-up unit 21 corresponding to each temperature sensor 11 is independent, the low level output by the wake-up unit 21 corresponding to any one temperature sensor 11 can wake up the MCU 23.
In one embodiment, as shown in fig. 3, the sampling circuit includes a sixth resistor R6, a seventh resistor R7, and a follower 221; an input end of the sixth resistor R6 is connected to the first power supply path, a first input end of the follower 221 is connected to an output end of the sixth resistor R6, and a second input end of the follower 221 and an input end of the seventh resistor R7 are both connected to an output end of the follower 221; the output end of the seventh resistor R7 is connected with the MCU 23;
the acquiring, by the sampling unit 22 connected to the wake-up unit 21, the voltage of the temperature sensor 11 exceeding a preset wake-up voltage threshold and outputting the voltage to the MCU23, wherein the MCU23 determines the real-time temperature of the temperature sensor 11 according to the received voltage of the temperature sensor 11, and includes:
the sampling unit 22 outputs the voltage of the temperature sensor 11, which exceeds a preset wake-up voltage threshold value and is collected from the first power supply path, to the MCU23 through the follower 221;
the MCU23 determines the resistance value of the temperature sensor 11 according to the output voltage of the power supply 3, the acquired voltage of the temperature sensor 11 and the resistance value of the first resistor R1;
the MCU23 determines the real-time temperature of the temperature sensor 11 from a preset temperature-resistance table according to the resistance of the temperature sensor 11.
In this embodiment, the sampling unit 22 may be configured to actually detect a voltage division of the power supply 3 (for example, 5VH power supply) by the temperature sensor 11 and the first resistor R1 (that is, a voltage of the temperature sensor 11 collected on the first power supply path that exceeds a preset wake-up voltage threshold), output the voltage division to the MCU23 through the digital signal interface 222, calculate a resistance value of the temperature sensor 11 in the MCU23 (the resistance value refers to a current real-time resistance value of the temperature sensor 11 after the temperature changes), and identify a real-time temperature corresponding to the current temperature sensor 11 according to a preset temperature-resistance table corresponding to the temperature sensor 11. Understandably, because the sampling unit 22 corresponding to each temperature sensor 11 is independent, the sampling unit 22 corresponding to any one temperature sensor 11 can transmit the voltage corresponding to the temperature sensor 11 to the MCU23, thereby implementing the whole alarm process.
In an embodiment, as shown in fig. 2, a monitoring system for a battery pack 1 is provided, and the monitoring system for a battery pack 1 corresponds to the monitoring method for a battery pack 1 in the above embodiment one by one. The battery pack 1 monitoring system comprises a controller and a battery management module 2 connected with the battery pack 1 and the controller, wherein all temperature sensors 11 in the battery pack 1 are in communication connection with the controller, and the controller is used for executing the battery pack 1 monitoring method.
In one embodiment, the battery management module 2 includes a power supply interface 24 and a CAN interface 25, and the battery pack 1 is connected to the battery management module 2 through the power supply interface 24 and the CAN interface 25. The battery pack 1 is provided with a whole-pack low-voltage interface 12, and the battery pack 1 is connected with the power supply interface 24 and the CAN interface 25 through the whole-pack low-voltage interface 12. The battery management module 2 supplies power to the battery pack 1 at low voltage through the power supply interface 24 and the whole-pack low-voltage interface 12, and the CAN interface 25 is used for transmitting signals of the battery pack 1 and the battery management module 2.
For specific limitations of the monitoring system of the battery pack 1, reference may be made to the above limitations of the monitoring method of the battery pack 1, and details thereof are not repeated here. The modules in the monitoring system of the battery pack 1 may be implemented in whole or in part by software, hardware, or a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
An automobile comprises a battery pack 1 and a battery pack 1 monitoring system.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 4. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer readable instructions, and a database. The internal memory provides an environment for the operating system and execution of computer-readable instructions in the non-volatile storage medium. The computer readable instructions, when executed by a processor, implement a battery pack 1 monitoring method.
In one embodiment, a computer device is provided, which includes a memory, a processor, and computer readable instructions stored on the memory and executable on the processor, wherein the processor implements the battery pack 1 monitoring method when executing the computer readable instructions.
In one embodiment, a computer readable storage medium is provided, having computer readable instructions stored thereon, which when executed by a processor, implement the above-described battery pack 1 monitoring method.
It will be understood by those of ordinary skill in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware associated with computer readable instructions, which can be stored in a non-volatile computer readable storage medium, and when executed, can include processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), Direct Rambus Dynamic RAM (DRDRAM), and Rambus Dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of each functional unit or module is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units or modules according to needs, that is, the internal structure of the system is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A battery pack monitoring method, comprising:
when a battery management module connected with the battery pack is monitored to be in a dormant state, acquiring the voltage of at least one temperature sensor arranged in the battery pack in real time; the distance between the temperature sensor and the explosion-proof valve of the battery pack is smaller than a preset distance;
when the voltage of any one of the temperature sensors is monitored to exceed a preset awakening voltage threshold value, awakening the battery management module in a dormant state;
the battery management module which is awakened acquires the real-time temperature of the temperature sensor, the voltage of which exceeds a preset awakening voltage threshold value, and prompts the thermal runaway alarm information of the battery pack when the real-time temperature exceeds a preset alarm temperature value or the temperature rise rate of the real-time temperature exceeds a preset alarm temperature rise rate.
2. The battery pack monitoring method according to claim 1, wherein after acquiring the real-time temperature of the temperature sensor with the voltage exceeding the preset wake-up voltage threshold value by the battery management module being woken up, the method further comprises:
and when the real-time temperature does not exceed the preset alarm temperature value and the temperature rise rate of the real-time temperature does not exceed the preset alarm temperature rise rate, confirming that the real-time temperature of the battery pack is in a normal state and the battery management module is mistakenly awakened, and controlling the battery management module to enter a dormant state again.
3. The battery pack monitoring method of claim 1, further comprising:
when monitoring that a battery management module connected with the battery pack is not in a dormant state, acquiring the real-time temperature of the temperature sensor with the voltage exceeding a preset awakening voltage threshold value through the battery management module not in the dormant state, and prompting thermal runaway alarm information of the battery pack when the real-time temperature exceeds a preset alarm temperature value or the temperature rise rate of the real-time temperature exceeds a preset alarm temperature rise rate.
4. The battery pack monitoring method according to claim 1, wherein the battery management module includes an MCU, a sampling unit, and a wake-up unit; the sampling unit is connected with the awakening unit; the number of the sampling units and the number of the awakening units are the same as the number of the temperature sensors, and each temperature sensor is respectively connected with the MCU through one sampling unit and one awakening unit;
when the voltage of any one of the temperature sensors is monitored to exceed a preset wake-up voltage threshold value, the battery management module in the dormant state is woken up, and the method comprises the following steps:
when any one of the awakening units monitors that the voltage of the temperature sensor exceeds a preset awakening voltage threshold value, awakening the MCU in a dormant state;
through awakening the battery management module obtains the real-time temperature that voltage surpassed the preset awakening voltage threshold value of temperature sensor, and when the real-time temperature surpassed preset alarm temperature value or the temperature rise rate of real-time temperature surpassed preset alarm temperature rise rate, the warning information of thermal runaway of battery package is reminded, include:
the sampling unit is connected with the awakening unit, the voltage of the temperature sensor exceeding a preset awakening voltage threshold value is acquired by the sampling unit and is output to the MCU, the MCU confirms the real-time temperature of the temperature sensor according to the received voltage of the temperature sensor, and when the real-time temperature exceeds a preset alarm temperature value or the temperature rise rate of the real-time temperature exceeds a preset alarm temperature rise rate, the real-time temperature of the battery pack is confirmed to be in an abnormal state, and thermal runaway alarm information of the battery pack is prompted to be included in the abnormal state.
5. The battery pack monitoring method according to claim 4, wherein the battery management module comprises a first resistor, an input end of the first resistor is connected with a power supply, and an output end of the first resistor is connected with a first end of the temperature sensor; the second end of the temperature sensor is grounded;
the awakening unit comprises a second resistor, a third resistor, a fourth resistor, a fifth resistor and a comparator; the input end of the second resistor is connected to a first power supply path between the first resistor and the temperature sensor; the input end of the third resistor is connected with a power supply, the output end of the third resistor is connected with the input end of the fourth resistor, and the output end of the fourth resistor is grounded; a first input end of the comparator is connected with an output end of the second resistor; a second input terminal of the comparator is connected to a second power supply path between the third resistor and the fourth resistor; the output end of the comparator is connected with the input end of a fifth resistor, and the output end of the fifth resistor is connected with the MCU;
when any one of the awakening units monitors that the voltage of the temperature sensor exceeds a preset awakening voltage threshold value, awakening the MCU in a dormant state, including:
the comparator in the awakening unit receives the voltage of the temperature sensor acquired in real time from the first power supply path through a first input end, and compares the voltage of the temperature sensor with a preset awakening voltage threshold acquired in real time from the second power supply path;
and when the voltage of the temperature sensor exceeds a preset wake-up voltage threshold, the comparator outputs a low level so as to wake up the MCU in a dormant state through the output low level.
6. The battery pack monitoring method according to claim 5, wherein the sampling circuit includes a sixth resistor, a seventh resistor, and a follower; the input end of the sixth resistor is connected to the first power supply path, the first input end of the follower is connected to the output end of the sixth resistor, and the second input end of the follower and the input end of the seventh resistor are both connected to the output end of the follower; the output end of the seventh resistor is connected with the MCU;
the acquiring of the voltage of the temperature sensor exceeding a preset wake-up voltage threshold value through the sampling unit connected with the wake-up unit and the outputting of the voltage to the MCU, the MCU determining the real-time temperature of the temperature sensor according to the received voltage of the temperature sensor, includes:
the sampling unit outputs the voltage of the temperature sensor which is acquired from the first power supply path and exceeds a preset wake-up voltage threshold value to the MCU through the follower;
the MCU determines the resistance value of the temperature sensor according to the output voltage of the power supply, the acquired voltage of the temperature sensor and the resistance value of the first resistor;
and the MCU determines the real-time temperature of the temperature sensor from a preset temperature-resistance meter according to the resistance value of the temperature sensor.
7. A battery pack monitoring system comprising a controller and a battery management module connected to the battery pack and the controller, all temperature sensors in the battery pack being communicatively connected to the controller, the controller being configured to perform the battery pack monitoring method of any one of claims 1 to 6.
8. The battery pack monitoring system of claim 7, wherein the battery management module includes a power supply interface and a CAN interface, the battery pack being connected to the battery management module through the power supply interface and the CAN interface.
9. An automobile comprising a battery pack and a battery pack monitoring system according to claim 7 or 8.
10. A computer device comprising a memory, a processor, and computer readable instructions stored in the memory and executable on the processor, wherein the processor when executing the computer readable instructions implements a battery pack monitoring method as claimed in any one of claims 1 to 6.
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