CN116190821A - Protection method and device for power battery, terminal equipment and computer medium - Google Patents
Protection method and device for power battery, terminal equipment and computer medium Download PDFInfo
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- CN116190821A CN116190821A CN202310202506.XA CN202310202506A CN116190821A CN 116190821 A CN116190821 A CN 116190821A CN 202310202506 A CN202310202506 A CN 202310202506A CN 116190821 A CN116190821 A CN 116190821A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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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
-
- 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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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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- 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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
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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
Abstract
The invention discloses a protection method, a device, terminal equipment and a computer medium of a power battery, comprising the following steps: acquiring a real-time temperature value, a real-time voltage value and a real-time smoke signal value of a target battery box; when the real-time temperature value is larger than or equal to a preset temperature threshold value, the real-time voltage value is smaller than or equal to a preset voltage threshold value and the real-time smoke signal value is out of a preset smoke signal range, injecting inert gas into the target battery box and recording gas injection time; and when the gas injection time is greater than or equal to a preset time threshold, the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold and the real-time smoke signal value is out of the smoke signal range, a fire inhibitor is injected into the battery box to protect a power battery in the target battery box. The invention can realize the technical effect of enabling the terminal equipment to accurately judge whether the power battery has thermal runaway risk.
Description
Technical Field
The present invention relates to the field of vehicle technologies, and in particular, to a method and apparatus for protecting a power battery, a terminal device, and a computer readable storage medium.
Background
Along with the development of new energy vehicle industry, the effect of power battery in the new energy vehicle is more and more important, and when the power battery appears that internal short circuit, battery case leak or power battery temperature such as too high, indicate that power battery has thermal runaway risk, especially when there is combustible gas such as oxygen in the battery case inside, extremely easily cause power battery to appear extreme conditions such as open flame burning, and then lead to whole car to fire explosion to cause casualties.
At present, a temperature sensor, a VOC sensor, a smoke sensor, a pressure sensor or an oxygen sensor are mainly arranged in a power battery box in a new energy vehicle, so that parameters such as the temperature, the smoke, the electrolyte or the pressure in the box of the battery are detected in the using process of the power battery, and then whether the power battery has a thermal runaway risk is judged according to the detected parameters, and when the thermal runaway risk of the power battery is confirmed, inert gas is injected into the battery box to replace oxygen in the battery box, so that the combustion condition in the battery box is blocked, and the probability of the whole vehicle fire explosion caused by the thermal runaway of the power battery is reduced; however, in the above manner, due to the limitation of the space of the battery box, the fire detector is usually disposed at the corner of the battery box, so that the battery management system cannot recognize the risk of thermal runaway of the battery at the first time.
Disclosure of Invention
The invention mainly aims to provide a protection method, a device, a terminal device and a computer readable storage medium of a power battery, aiming at enabling the terminal device to accurately judge whether the power battery has a thermal runaway risk or not, further protecting the power battery in time when judging that the power battery has the thermal runaway risk and improving the safety of a vehicle.
In order to achieve the above object, the present invention provides a protection method of a power battery, the protection method of the power battery comprising the steps of:
acquiring a real-time temperature value, a real-time voltage value and a real-time smoke signal value of a target battery box;
when the real-time temperature value is larger than or equal to a preset temperature threshold value, the real-time voltage value is smaller than or equal to a preset voltage threshold value and the real-time smoke signal value is out of a preset smoke signal range, injecting inert gas into the target battery box and recording gas injection time;
and when the gas injection time is greater than or equal to a preset time threshold, the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold and the real-time smoke signal value is out of the smoke signal range, injecting a fire inhibitor into the target battery box to protect a power battery in the target battery box.
Further, the protection method of the power battery is applied to terminal equipment provided with a first on-off valve, a second on-off valve, a third on-off valve, a battery box, a standby air cylinder, an inert gas replacement device and a fire disaster inhibitor storage device, wherein the first on-off valve, the second on-off valve and the third on-off valve are respectively connected with the battery box, the first on-off valve is also connected with the standby air cylinder, the standby air cylinder is connected with the inert gas replacement device, the second on-off valve is connected with the inert gas replacement device, and the third on-off valve is connected with the fire disaster inhibitor storage device;
the step of injecting inert gas into the target battery box and recording gas injection time comprises the following steps:
controlling the first on-off valve and the third on-off valve to switch to a closed state, and controlling the second on-off valve to switch to an open state so that inert gas flows into the target battery box through the second on-off valve;
and recording the gas circulation time of the inert gas flowing through the second break valve, and determining the gas circulation time as the gas injection time.
Further, after the step of obtaining the real-time temperature value, the real-time voltage value, and the real-time smoke signal value of the target battery box, the method further includes:
Acquiring a real-time air pressure value of the battery box, and obtaining an air pressure difference value between the real-time air pressure value and an atmospheric air pressure value;
when the air pressure difference value is smaller than a preset air pressure threshold value, injecting the inert gas into the target battery box;
and stopping injecting the inert gas into the target battery box when the air pressure difference value is greater than or equal to the air pressure threshold value.
Further, the step of injecting the fire inhibitor into the target battery box comprises the following steps:
and controlling the first on-off valve and the second on-off valve to switch to the closed state, and controlling the third on-off valve to switch to the open state so as to enable the fire inhibitor to flow into the target battery box through the third on-off valve.
Further, after the step of injecting a fire suppressant into the target battery compartment to protect the power cells in the target battery compartment, the method further comprises:
judging whether the target vehicle completes the power-down operation of the whole vehicle or not;
if yes, executing the step of acquiring the real-time temperature value, the real-time voltage value and the real-time smoke signal value of the target battery box according to a preset time interval.
Further, before the step of obtaining the real-time temperature value, the real-time voltage value, and the real-time smoke signal value of the target battery box, the method further includes:
acquiring a target air source from the target vehicle, and performing condensation drying and filtering operation on the target air source;
and replacing the target gas source with the inert gas through the inert gas replacement device, and performing secondary filtering operation on the inert gas.
Further, after the step of injecting a fire suppressant into the target battery compartment to protect the power cells in the target battery compartment, the method further comprises:
acquiring preset alarm information;
and outputting the alarm information through an output device configured in the target vehicle to remind other vehicles around the target vehicle.
In addition, to achieve the above object, the present invention also provides a protection device for a power battery, the device comprising:
the parameter acquisition module is used for acquiring a real-time temperature value, a real-time voltage value and a real-time smoke signal value of the target battery box;
the first execution module is used for injecting inert gas into the target battery box and recording gas injection time when the real-time temperature value is greater than or equal to a preset temperature threshold value, the real-time voltage value is less than or equal to a preset voltage threshold value and the real-time smoke signal value is out of a preset smoke signal range;
And the second execution module is used for injecting fire inhibitors into the target battery box to protect the power battery in the target battery box when the gas injection time is greater than or equal to a preset time threshold, the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold and the real-time smoke signal value is out of the smoke signal range.
In addition, to achieve the above object, the present invention also provides a terminal device including: the power battery protection device comprises a memory, a processor and a power battery protection program which is stored in the memory and can run on the processor, wherein the power battery protection program realizes the steps of the power battery protection method when being executed by the processor.
In addition, in order to achieve the above object, the present invention also provides a computer-readable storage medium having stored thereon a protection program for a power battery, which when executed by a processor, implements the steps of the protection method for a power battery as described above.
The method, the device, the terminal equipment and the computer readable storage medium for protecting the power battery are provided by the embodiment of the invention, and the real-time temperature value, the real-time voltage value and the real-time smoke signal value of the target battery box are obtained; when the real-time temperature value is larger than or equal to a preset temperature threshold value, the real-time voltage value is smaller than or equal to a preset voltage threshold value and the real-time smoke signal value is out of a preset smoke signal range, injecting inert gas into the target battery box and recording gas injection time; and when the gas injection time is greater than or equal to a preset time threshold, the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold and the real-time smoke signal value is out of the smoke signal range, injecting a fire inhibitor into the target battery box to protect a power battery in the target battery box.
In this embodiment, when the terminal device is running, firstly, the temperature sensor, the current sensor and the smoke sensor configured in the target vehicle detect the target battery box in the target vehicle to obtain the real-time temperature value, the real-time voltage value and the real-time smoke signal value of the target battery box, then, the terminal device reads the storage device to obtain the temperature threshold value, the voltage threshold value and the smoke signal range preset by a technician, and compares the real-time temperature value with the temperature threshold value, and at the same time, compares the real-time voltage value with the voltage threshold value, and at the same time, compares the real-time smoke signal value with the smoke signal range, and when the terminal device determines that the real-time temperature value is greater than or equal to the temperature threshold value, the real-time voltage value is less than or equal to the voltage threshold value and the real-time smoke signal value is out of the smoke signal range, judging that the target battery box has thermal runaway risk, controlling a first on-off valve and a third on-off valve in the terminal equipment to switch to a closed state, controlling a second on-off valve to switch to an open state so as to enable a gas replacement device to inject obtained inert gas into the battery box through the second on-off valve, accelerating the discharge of combustible gas in the battery box, meanwhile, the terminal equipment calling a detection device to detect the target battery box so as to acquire gas injection time, finally, the terminal equipment acquiring a time threshold value preset by a technician in the storage device, judging that the thermal runaway risk still exists in the battery box and determining that the thermal runaway risk is increased when the gas injection time is greater than or equal to the time threshold value, the real-time temperature value is greater than or equal to the temperature threshold value, the real-time voltage value is less than or equal to the voltage threshold value and the real-time smoke signal value is out of the smoke signal range, the terminal equipment further controls the second break valve to be switched to a closed state and controls the third break valve to be switched to an open state, so that the fire disaster inhibitor stored in the fire disaster inhibitor storage device enters the target battery box through the third break valve to eliminate the thermal runaway risk of the battery, and further the power battery in the battery box is protected.
In this way, the invention adopts the mode of detecting the battery box through the sensor to obtain the real-time temperature value, the real-time voltage value and the real-time smoke signal value of the battery box, and judging whether the thermal runaway risk exists in the power battery in the battery box or not by determining that the real-time temperature value is larger than or equal to a preset temperature threshold value, the real-time voltage value is smaller than or equal to a preset voltage threshold value and the smoke signal value is out of the smoke signal range, namely, by arranging a plurality of sensors and detecting the battery box at the same time, the invention accurately judges whether the thermal runaway risk exists in the power battery through a plurality of indexes, solves the technical problem that the thermal runaway risk of the battery cannot be identified in the first time due to the limitation of the space of the battery box in the prior art, and enables a battery management system to be usually arranged at the corners of the battery box.
Drawings
Fig. 1 is a schematic structural diagram of a terminal device of a hardware running environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a method for protecting a power battery according to the present invention;
FIG. 3 is a schematic diagram of a system according to an embodiment of a method for protecting a power battery of the present invention;
FIG. 4 is a schematic flow chart of a preferred embodiment of a method for protecting a power battery according to the present invention;
fig. 5 is a schematic diagram of functional modules related to an embodiment of a protection method of a power battery according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic diagram of a terminal device structure of a hardware running environment according to an embodiment of the present invention.
It should be noted that fig. 1 may be a schematic structural diagram of a hardware operating environment of a terminal device. The terminal equipment of the embodiment of the invention can be terminal equipment for executing the protection method of the power battery, and the terminal equipment can be a data storage control terminal, a PC or a portable computer and other terminals.
As shown in fig. 1, the terminal device may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) Memory or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the structure shown in fig. 1 does not constitute a limitation of the terminal device, and may include more or less components than illustrated, or may combine certain components, or may be arranged in different components.
As shown in fig. 1, an operating system, a data storage module, a network communication module, a user interface module, and a protection program of a power battery may be included in the memory 1005 as one storage medium.
In the terminal device shown in fig. 1, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the terminal device of the present invention may be provided in the terminal device, and the terminal device invokes the protection program of the power battery stored in the memory 1005 through the processor 1001, and executes the protection method of the power battery provided in the embodiment of the present invention.
Based on the above terminal device, various embodiments of the protection method of the power battery of the present invention are provided.
Referring to fig. 2, fig. 2 is a flow chart of a first embodiment of a protection method for a power battery according to the present invention.
It should be understood that although a logical sequence is illustrated in the flow chart, the method of protecting a power cell of the present invention may, of course, in some cases, also be performed in a different order than that shown or described herein.
In this embodiment, the protection method of the power battery of the present invention may include the following steps:
step S10: acquiring a real-time temperature value, a real-time voltage value and a real-time smoke signal value of a target battery box;
in this embodiment, when the terminal device is running, first, each sensor deployed in the terminal device is controlled to detect a target battery box configured in a target vehicle so as to obtain a real-time temperature value, a real-time voltage value and a real-time smoke signal value of the target battery box, and each obtained parameter is input into a vehicle controller configured in the terminal device.
For example, referring to fig. 3, fig. 3 is a schematic diagram of a system structure related to an embodiment of a power battery protection method according to the present invention, as shown in fig. 3, when a terminal device is running, firstly, a single temperature sensor configured in the terminal device is controlled to detect a target battery box to obtain a real-time temperature value of the target battery box, meanwhile, the terminal device is controlled to control an internally configured voltage sensor to detect the target battery box to obtain a real-time voltage value of the target battery box, meanwhile, the terminal device is controlled to control a smoke sensor to detect the target battery box through an internally configured safety protection controller to obtain a real-time smoke signal value of the target battery box, and then, the terminal device inputs the obtained real-time temperature value, the real-time voltage value and the real-time smoke signal value into a whole vehicle controller configured in the terminal device.
Further, in a possible embodiment, before the step S10, the protection method of the power battery of the present invention may further include:
step A10: acquiring a target air source from the target vehicle, and performing condensation drying and filtering operation on the target air source;
step A20: replacing the target gas source with the inert gas through the inert gas replacement device, and performing secondary filtering operation on the inert gas;
For example, as shown in fig. 3, before the terminal device obtains each parameter, the terminal device first controls the air compressor configured in the terminal device to provide a target air source, then the terminal device performs condensation and drying operations on the target air source through the condenser and the dryer configured in the terminal device, and inputs the dried target air source into the filter 1 configured in the terminal device to perform filtering operations, then the terminal device replaces the filtered target air source with inert gas through the inert gas replacement device, inputs the inert gas into the filter 2 configured in the terminal device, performs secondary filtering operations on the inert gas through the filter 2, and further inputs the filtered inert gas into the pressure reducing valve 1 configured in the terminal device to reduce the pressure of the inert gas, so that the inert gas is convenient to be injected into the target battery box, and meanwhile, the terminal device also needs to inject part of the inert gas into the standby air storage cylinder configured in the terminal device for storage.
Step S20: when the real-time temperature value is larger than or equal to a preset temperature threshold value, the real-time voltage value is smaller than or equal to a preset voltage threshold value and the real-time smoke signal value is out of a preset smoke signal range, injecting inert gas into the target battery box and recording gas injection time;
In this embodiment, the whole vehicle controller reads the storage device to obtain a temperature threshold value, a voltage threshold value and a smoke signal range preset by a technician, compares the obtained real-time temperature value with the temperature threshold value, simultaneously, the whole vehicle controller compares the obtained real-time voltage value with the voltage threshold value, simultaneously, the whole vehicle controller compares the obtained real-time smoke signal value with the smoke signal range, when the whole vehicle controller determines that the real-time temperature value is greater than or equal to the temperature threshold value, the real-time voltage value is less than or equal to the voltage threshold value and the real-time smoke signal value is out of the smoke signal range, the whole vehicle controller determines that the target battery box has a thermal runaway risk, so that a preset first risk control mode is entered, the terminal device further adjusts each on-off valve configured inside according to the first risk control mode to enable inert gas to enter the target battery box, and meanwhile, the terminal device calls the detection device to detect the target battery box to record gas injection time.
For example, as shown in fig. 3, when the vehicle controller obtains the real-time temperature value, the real-time voltage value and the real-time smoke signal value, the storage device is firstly read to obtain a temperature threshold value, a voltage threshold value and a smoke signal range preset by a technician, then the vehicle controller compares the real-time temperature value with the temperature threshold value, and simultaneously, the vehicle controller compares the real-time voltage value with the voltage threshold value, and simultaneously, the vehicle controller compares the real-time smoke signal value with the smoke signal range, and then, when the vehicle controller determines that the real-time temperature value is greater than or equal to the temperature threshold value, the real-time voltage value is less than or equal to the voltage threshold value and the real-time smoke signal value is outside the smoke signal range, the terminal device determines that a thermal runaway risk exists in a power battery in the target battery box so as to enter a first risk control mode, and finally, the terminal device adjusts the on-off valve 1, the on-off valve 2 and the on-off valve 3 configured in the terminal device in the first risk control mode so that inert gas in the inert gas replacement device enters the target battery box to accelerate the discharge of combustible gas in the target battery box, and simultaneously, and the terminal device controls the detection device to detect the injection time of the target battery box.
Further, in a possible embodiment, the step of "injecting the inert gas into the target battery box and recording the gas injection time" in the step S20 may specifically include:
step S201: controlling the first on-off valve and the third on-off valve to switch to a closed state, and controlling the second on-off valve to switch to an open state so that inert gas flows into the target battery box through the second on-off valve;
step S202: recording the gas circulation time of the inert gas flowing through the second break valve, and determining the gas circulation time as the gas injection time;
for example, as shown in fig. 3, the terminal device adjusts the on-off valve 1 and the on-off valve 3 configured inside to a closed state and adjusts the on-off valve 2 to an open state, so that the inert gas exchanged inside the inert gas exchanging device is reduced in pressure by the pressure reducing valve 1 and then enters the target battery box through the on-off valve 2, meanwhile, the terminal device invokes the detecting device to detect the target battery box, and starts timing when the inert gas is detected to flow into the target battery box through the on-off valve 2, so as to obtain a gas circulation time, and finally, the terminal device determines the detected gas circulation time as a gas injection time.
Step S30: when the gas injection time is greater than or equal to a preset time threshold, the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold, and the real-time smoke signal value is out of the smoke signal range, a fire inhibitor is injected into the target battery box to protect a power battery in the target battery box;
in this embodiment, the whole vehicle controller reads the storage device to obtain a time threshold preset by a technician, compares the obtained gas injection time with the time threshold, and when the terminal device determines that the gas injection time is greater than or equal to the time threshold, the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold, and the real-time smoke signal value is still outside the smoke signal range, the terminal device determines that the thermal runaway risk existing in the target battery box is further enlarged, so that the risk level of the thermal runaway risk is improved to enter a second risk control mode, and then adjusts each on-off valve according to the second risk control mode, so that the fire inhibitor in the fire inhibitor storage device configured in the terminal device enters the target battery box to protect the power battery in the target battery box.
For example, the vehicle controller reads the storage device to obtain a time threshold preset by a technician, compares the obtained gas injection time with the time threshold, further compares the real-time temperature value, the real-time voltage value and the real-time smoke signal value of the battery box with the corresponding thresholds when determining that the gas injection time is greater than or equal to the time threshold, and determines that the thermal runaway risk in the battery box is increased when determining that the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold and the real-time smoke signal value is still outside the smoke signal range, so as to enter a second risk control mode, and adjusts each on-off valve in the second risk control mode to enable the fire inhibitor stored in the fire inhibitor storage device in the terminal device to flow into the target battery box, so as to protect the power battery in the target battery box through the fire inhibitor.
Further, in a possible embodiment, the step of "injecting the fire inhibitor into the target battery box" in the step S30 may specifically include:
Step S301: controlling the first on-off valve and the second on-off valve to switch to the closed state, and controlling the third on-off valve to switch to the open state so as to enable the fire inhibitor to flow into the target battery box through the third on-off valve;
for example, as shown in fig. 3, the terminal device in the second risk control mode first switches the on-off valve 2 in the first open state to the closed state, and at the same time, the terminal device switches the on-off valve 3 in the closed state from the closed state to the open state, so that the fire inhibitor storage device configured in the terminal device inputs the stored fire inhibitor into the target battery box through the on-off valve 3.
Further, in a possible embodiment, after the step S30, the protection method of the power battery of the present invention may further include:
step B10: judging whether the target vehicle completes the power-down operation of the whole vehicle or not;
step B20: if yes, executing the step of acquiring the real-time temperature value, the real-time voltage value and the real-time smoke signal value of the target battery box according to a preset time interval;
for example, as shown in fig. 3, for example, the terminal device invokes an internally configured detection device to detect a power management system in a target vehicle to determine whether a driver controls the battery management system to perform a whole vehicle power-down operation, and then, when determining that the driver performs the whole vehicle power-down operation through the battery management system, the terminal device obtains power at a standby power supply and a DCDC of a power battery, which are internally configured, and intermittently invokes a temperature sensor, a voltage sensor and a smoke sensor to detect a target battery box according to a time interval preset by a technician, so as to obtain a real-time temperature value, a real-time voltage value and a real-time smoke signal value.
Further, in a possible embodiment, after the step S30, the protection method of the power battery of the present invention may further include:
step C10: acquiring preset alarm information;
step C20: outputting the alarm information through an output device configured in the target vehicle to remind other vehicles around the target vehicle;
for example, as shown in fig. 3, when the terminal device determines that the target battery box has a thermal runaway risk, the terminal device reads the storage device to obtain alarm information preset by a technician, and inputs the alarm information to a whole vehicle controller configured in the terminal device, the whole vehicle controller inputs the alarm information to a TBox connected to the whole vehicle controller, and then outputs the alarm information through a TBox to remind other vehicles around the target vehicle.
In this embodiment, when the terminal device is running, first, each sensor deployed in the terminal device is controlled to detect a target battery box configured in a target vehicle to obtain a real-time temperature value, a real-time voltage value and a real-time smoke signal value of the target battery box, and input each obtained parameter into a vehicle controller configured in the terminal device, then, the vehicle controller reads a storage device to obtain a temperature threshold value, a voltage threshold value and a smoke signal range preset by a technician, and compares the obtained real-time temperature value with the temperature threshold value, and at the same time, the vehicle controller compares the obtained real-time voltage value with the voltage threshold value, and at the same time, the vehicle controller compares the obtained real-time smoke signal value with the smoke signal range, and when the vehicle controller determines that the real-time temperature value is greater than or equal to the temperature threshold value, the real-time voltage value is less than or equal to the voltage threshold value and the real-time smoke signal value is out of the smoke signal range, determining that the target battery box has thermal runaway risk, entering a preset first risk control mode, regulating each on-off valve configured inside by the terminal equipment according to the first risk control mode to enable inert gas to enter the target battery box, meanwhile, calling a detection device by the terminal equipment to detect the target battery box so as to record gas injection time, finally, reading a storage device by the whole vehicle controller so as to obtain a time threshold preset by a technician, comparing the obtained gas injection time with the time threshold, and when the gas injection time is greater than or equal to the time threshold, the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold and the real-time smoke signal value is still out of the smoke signal range by the terminal equipment, the terminal equipment determines that the thermal runaway risk existing in the target battery box is further enlarged, so that the risk level of the thermal runaway risk is improved to enter a second risk control mode, and then the terminal equipment adjusts each on-off valve according to the second risk control mode, so that the fire disaster inhibitor in the fire disaster inhibitor storage device arranged in the terminal equipment enters the target battery box to protect the power battery in the target battery box.
In this way, the invention adopts the mode of detecting the battery box through the sensor to obtain the real-time temperature value, the real-time voltage value and the real-time smoke signal value of the battery box, and judging whether the thermal runaway risk exists in the power battery in the battery box or not by determining that the real-time temperature value is larger than or equal to a preset temperature threshold value, the real-time voltage value is smaller than or equal to a preset voltage threshold value and the smoke signal value is out of the smoke signal range, namely, by arranging a plurality of sensors and detecting the battery box at the same time, the invention accurately judges whether the thermal runaway risk exists in the power battery through a plurality of indexes, solves the technical problem that the thermal runaway risk of the battery cannot be identified in the first time due to the limitation of the space of the battery box in the prior art, and enables a battery management system to be usually arranged at the corners of the battery box.
Further, based on the first embodiment of the protection method of the power battery of the present invention described above, a second embodiment of the protection method of the power battery of the present invention is presented herein.
Based on the first embodiment of the protection method for a power battery of the present invention shown in fig. 2, after the step S10, the protection method for a power battery of the present invention may further include the steps of:
step D10: acquiring a real-time air pressure value of the battery box, and obtaining an air pressure difference value between the real-time air pressure value and an atmospheric air pressure value;
in this embodiment, when the terminal device detects the target battery box through each sensor, the terminal device may further control the air pressure sensor configured in the terminal device to detect the target battery box so as to obtain a real-time air pressure value in the target battery box, and at the same time, the terminal device obtains an atmospheric pressure value at the current moment, calculates to obtain an air pressure difference value generated between the real-time air pressure value and the atmospheric pressure value, and then inputs the air pressure difference value into the whole vehicle controller.
Step D20: when the air pressure difference value is smaller than a preset air pressure threshold value, injecting the inert gas into the target battery box;
in this embodiment, the terminal device reads the storage device to obtain an air pressure threshold preset by a technician, compares the calculated air pressure difference with the air pressure threshold to obtain a comparison result, and determines that the air tightness of the target battery box is abnormal when the terminal device determines that the air pressure difference is smaller than the air pressure threshold, so as to enter a first risk control mode, and adjusts each on-off valve in the first risk control mode to inject inert gas into the target battery box.
Step D30: stopping injecting the inert gas into the target battery box when the air pressure difference value is greater than or equal to the air pressure threshold value;
in this embodiment, when the terminal device determines that the air pressure difference is greater than or equal to the air pressure threshold as a result of the comparison, the terminal device can disconnect the device to determine that the air tightness of the target battery box is normal, so as to exit the first risk control mode to stop injecting the inert gas into the target battery box.
For example, as shown in fig. 3, when the terminal device obtains a real-time temperature value, a real-time voltage value and a real-time smoke signal value of the target battery box and determines that the real-time temperature value is smaller than a temperature threshold value, the real-time voltage value is smaller than a voltage threshold value and the real-time smoke signal value is within a smoke signal range, the terminal device further controls an internal pressure sensor arranged in the terminal device to detect the target battery box to obtain a real-time air pressure value P1 of the target battery box, meanwhile, the terminal device detects the surrounding environment through a pressure sensor arranged in the inert gas replacement device to obtain an atmospheric air pressure value P2 corresponding to the real-time air pressure value P1, the terminal device further determines an air pressure difference value between the real-time air pressure value P1 and the atmospheric air pressure value P2 and inputs the air pressure difference value into the whole vehicle controller, then, the whole vehicle controller reads the storage device to acquire a first air pressure threshold value delta P1 and a second air pressure threshold value delta P2 preset by a technician, compares the acquired air pressure difference value with the first air pressure threshold value delta P1 and the second air pressure threshold value delta P2 respectively, when the air pressure difference value is smaller than the first air pressure threshold value delta P1, the terminal equipment determines that the air tightness of the target battery box is abnormal, so as to enter a first risk control mode, the on-off valve 1 and the on-off valve 3 are regulated to be in a closed state according to the first risk control mode, the on-off valve 2 is regulated to be in an open state, so that inert gas in the inert gas replacement device enters the target battery box through the on-off valve 2, and likewise, when the air pressure difference value is larger than or equal to the second air pressure threshold value delta P2, the terminal equipment determines that the air tightness of the target battery box is recovered to be normal, thereby exiting the first risk control mode and adjusting the on-off valve 2 to the closed state to stop the injection of the inert gas into the target battery box.
In this embodiment, when the terminal device detects the target battery box through each sensor, the terminal device may further control the air pressure sensor configured in the terminal device to detect the target battery box so as to obtain a real-time air pressure value in the target battery box, meanwhile, the terminal device obtains an air pressure value at the current moment, calculates to obtain an air pressure difference value generated between the real-time air pressure value and the air pressure value, and further inputs the air pressure difference value into the whole vehicle controller, then, the terminal device reads the storage device to obtain an air pressure threshold value preset by a technician, compares the calculated air pressure difference value with the air pressure threshold value to obtain a comparison result, when the terminal device determines that the comparison result is that the air pressure difference value is smaller than the air pressure threshold value, the terminal device determines that the air tightness of the target battery box is abnormal, so as to enter the first risk control mode, adjusts each on-off valve in the first risk control mode so as to inject inert gas into the target battery box, and finally, when the terminal device determines that the comparison result is that the air pressure difference value is larger than or equal to the air pressure threshold value, the terminal device can determine the air tightness of the target battery box, so as to stop the injection of the inert gas into the target battery box in the first risk control mode.
Therefore, the invention adopts the mode of detecting the air pressure in the target battery box and judging whether the target battery box has thermal runaway risk caused by abnormal air tightness according to the air pressure difference between the real-time air pressure value and the atmospheric air pressure value in the target battery box, and further timely injecting inert gas into the target battery box when the air tightness problem of the target battery box is determined, solves the technical problem that whether the battery box has thermal runaway risk caused by abnormal air tightness in the prior art can not be timely judged, and achieves the aim of timely finding whether the battery box has thermal runaway risk through the change of the air pressure in the battery box under the condition that parameters such as the temperature, the voltage or smoke signals of the battery box are normal.
Further, based on the above embodiments of the protection method of the power battery of the present invention, preferred embodiments of the protection method of the power battery of the present invention are presented herein.
Referring to fig. 4, fig. 4 is a schematic flow chart of a preferred embodiment of the protection method of a power battery of the present invention, as shown in fig. 4, in this embodiment, when a terminal device operates, firstly, each sensor configured inside detects a target battery box to obtain a real-time temperature value, a real-time voltage value and a real-time smoke signal value of the target battery box, and simultaneously, the terminal device obtains respective corresponding thresholds of each real-time parameter, and judges whether the target battery box meets a thermal runaway condition according to each threshold and each real-time parameter, after that, when the terminal device determines that the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold and the real-time smoke signal value is out of the smoke signal range, the terminal device determines that the target battery box has a thermal runaway risk, so as to adjust the on-off valve 2 to an open state according to fig. 3, and then, the terminal device will record the obtained gas injection time and when the gas injection time reaches a preset time threshold t, and each parameter is determined that the real-time parameter is within a fault range, the terminal device still has a thermal runaway state in the target battery box is still reached, and the fire inhibitor is further adjusted to the on-off valve 3 through the battery box to the open state of the terminal device to the fire inhibitor, and the terminal device is further adjusted to the fire protection device 3 to have the fire hazard inhibitor in the open to the battery box to the open state 3 when the terminal device is further has been adjusted to the open to the battery box to the open state 3 as shown in fig. 3;
In addition, when the terminal equipment determines that the real-time temperature value, the real-time voltage value and the real-time smoke signal value are in normal ranges, the pressure sensor arranged in the battery box is further called to detect the target battery box so as to obtain the real-time pressure value and the atmospheric pressure value of the target battery box, the pressure difference value is obtained through calculation according to the real-time pressure value and the atmospheric pressure value, the pressure difference value is compared with a first pressure threshold value delta P1, when the terminal equipment determines that the pressure difference value is smaller than the first pressure threshold value delta P1, the terminal equipment determines that the target battery box has an airtight fault, the on-off valves 1 are adjusted to an opening state, the on-off valve 2 and the on-off valve 3 are adjusted to a closing state, inert gas stored in the standby gas storage cylinder flows into the target battery box after being depressurized through the depressurization valve 2 connected with the on-off valve 1, then the terminal equipment adjusts the on-off valve 1 to a closing state so as to stop injecting the inert gas into the target battery box when the terminal equipment determines that the pressure difference value is larger than or equal to the second pressure threshold value delta P2, and then when the terminal equipment detects that the pressure change value in the battery box is larger than the preset change value, the terminal equipment continuously determines that the abnormal pressure exists, and accordingly the abnormal pressure is determined to be the abnormal.
In addition, in order to achieve the above objective, the present invention further provides a protection device for a power battery, referring to fig. 5, fig. 5 is a schematic diagram of functional modules related to an embodiment of a protection method for a power battery according to the present invention, and as shown in fig. 5, the protection device for a power battery according to the present invention includes:
the parameter acquisition module 10 is used for acquiring a real-time temperature value, a real-time voltage value and a real-time smoke signal value of the target battery box;
the first execution module 20 is configured to inject an inert gas into the target battery box and record a gas injection time when the real-time temperature value is greater than or equal to a preset temperature threshold, the real-time voltage value is less than or equal to a preset voltage threshold, and the real-time smoke signal value is outside a preset smoke signal range;
and a second execution module 30, configured to inject a fire inhibitor into the target battery box to protect a power battery in the target battery box when the gas injection time is greater than or equal to a preset time threshold, the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold, and the real-time smoke signal value is outside the smoke signal range.
Further, the protection method of the power battery is applied to terminal equipment provided with a first on-off valve, a second on-off valve, a third on-off valve, a battery box, a standby air cylinder, an inert gas replacement device and a fire disaster inhibitor storage device, wherein the first on-off valve, the second on-off valve and the third on-off valve are respectively connected with the battery box, the first on-off valve is also connected with the standby air cylinder, the standby air cylinder is connected with the inert gas replacement device, the second on-off valve is connected with the inert gas replacement device, and the third on-off valve is connected with the fire disaster inhibitor storage device;
the first execution module 20 includes:
the first regulating unit is used for controlling the first on-off valve and the third on-off valve to be switched to a closed state and controlling the second on-off valve to be switched to an open state so as to enable inert gas to flow into the target battery box through the second on-off valve;
and the time recording unit is used for recording the gas circulation time of the inert gas flowing through the second break valve and determining the gas circulation time as the gas injection time.
Further, the first execution module 20 further includes:
The air pressure detection unit is used for acquiring a real-time air pressure value of the battery box and obtaining an air pressure difference value between the real-time air pressure value and an atmospheric air pressure value;
a gas injection unit for injecting the inert gas into the target battery box when the air pressure difference is smaller than a preset air pressure threshold;
and the stop injection unit is used for stopping the injection of the inert gas into the target battery box when the air pressure difference value is greater than or equal to the air pressure threshold value.
Further, the second execution module 30 includes:
and the second regulating unit is used for controlling the first on-off valve and the second on-off valve to be switched to the closed state and controlling the third on-off valve to be switched to the open state so as to enable the fire inhibitor to flow into the target battery box through the third on-off valve.
Further, the second execution module 30 further includes:
the power-down judging unit is used for judging whether the target vehicle finishes the whole vehicle power-down operation or not;
and the power-down detection unit is used for executing the step of acquiring the real-time temperature value, the real-time voltage value and the real-time smoke signal value of the target battery box according to a preset time interval if the target vehicle is judged to finish the whole vehicle power-down operation.
Further, the parameter obtaining module 10 includes:
the gas treatment unit is used for acquiring a target gas source from the target vehicle and performing condensation drying and filtering operation on the target gas source;
and the gas replacement unit is used for replacing the target gas source with the inert gas through the inert gas replacement device and performing secondary filtering operation on the inert gas.
Further, the second execution module 30 further includes:
the information acquisition unit is used for acquiring preset alarm information;
and the information alarm unit is used for outputting the alarm information through an output device configured in the target vehicle so as to remind other vehicles around the target vehicle.
In addition, the invention also provides a terminal device, the terminal device is provided with a protection program of the power battery which can run on a processor, and the terminal device realizes the steps of the protection method of the power battery according to any one of the embodiments when executing the protection program of the power battery.
The specific embodiment of the terminal device of the present invention is basically the same as the embodiments of the protection method of the power battery described above, and will not be described herein.
Furthermore, the present invention provides a computer readable storage medium, on which a protection program for a power battery is stored, which when executed by a processor, implements the steps of the protection method for a power battery according to any one of the above embodiments.
The specific embodiments of the computer readable storage medium are basically the same as the embodiments of the protection method of the power battery, and are not described herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a terminal device for performing the method of protecting a power battery provided by the present invention, which may be a terminal device of a data storage control terminal, a PC or a portable computer, etc.) to perform the method of the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. The protection method of the power battery is characterized by comprising the following steps of:
acquiring a real-time temperature value, a real-time voltage value and a real-time smoke signal value of a target battery box;
when the real-time temperature value is larger than or equal to a preset temperature threshold value, the real-time voltage value is smaller than or equal to a preset voltage threshold value and the real-time smoke signal value is out of a preset smoke signal range, injecting inert gas into the target battery box and recording gas injection time;
and when the gas injection time is greater than or equal to a preset time threshold, the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold and the real-time smoke signal value is out of the smoke signal range, injecting a fire inhibitor into the target battery box to protect a power battery in the target battery box.
2. The method for protecting a power battery according to claim 1, wherein the method for protecting a power battery is applied to a terminal device provided with a first on-off valve, a second on-off valve, a third on-off valve, a battery box, a standby air reservoir, an inert gas replacement device and a fire inhibitor storage device, wherein the first on-off valve, the second on-off valve and the third on-off valve are respectively connected with the battery box, the first on-off valve is also connected with the standby air reservoir, the standby air reservoir is connected with the inert gas replacement device, the second on-off valve is connected with the inert gas replacement device, and the third on-off valve is connected with the fire inhibitor storage device;
the step of injecting inert gas into the target battery box and recording gas injection time comprises the following steps:
controlling the first on-off valve and the third on-off valve to switch to a closed state, and controlling the second on-off valve to switch to an open state so that inert gas flows into the target battery box through the second on-off valve;
and recording the gas circulation time of the inert gas flowing through the second break valve, and determining the gas circulation time as the gas injection time.
3. The method of protecting a power battery according to claim 2, wherein after the step of acquiring the real-time temperature value, the real-time voltage value, and the real-time smoke signal value of the target battery box, the method further comprises:
acquiring a real-time air pressure value of the battery box, and obtaining an air pressure difference value between the real-time air pressure value and an atmospheric air pressure value;
when the air pressure difference value is smaller than a preset air pressure threshold value, injecting the inert gas into the target battery box;
and stopping injecting the inert gas into the target battery box when the air pressure difference value is greater than or equal to the air pressure threshold value.
4. The method of protecting a power battery according to claim 3, wherein the step of injecting the fire suppressing agent into the target battery box comprises:
and controlling the first on-off valve and the second on-off valve to switch to the closed state, and controlling the third on-off valve to switch to the open state so as to enable the fire inhibitor to flow into the target battery box through the third on-off valve.
5. The method of protecting a power battery according to claim 4, wherein after the step of injecting a fire suppressing agent into the target battery box to protect the power battery in the target battery box, the method further comprises:
Judging whether the target vehicle completes the power-down operation of the whole vehicle or not;
if yes, executing the step of acquiring the real-time temperature value, the real-time voltage value and the real-time smoke signal value of the target battery box according to a preset time interval.
6. The method of claim 5, wherein prior to the step of obtaining the real-time temperature value, the real-time voltage value, and the real-time smoke signal value of the target battery box, the method further comprises:
acquiring a target air source from the target vehicle, and performing condensation drying and filtering operation on the target air source;
and replacing the target gas source with the inert gas through the inert gas replacement device, and performing secondary filtering operation on the inert gas.
7. The method of protecting a power battery according to claim 1, wherein after the step of injecting a fire inhibitor into the target battery box to protect the power battery in the target battery box, the method further comprises:
acquiring preset alarm information;
and outputting the alarm information through an output device configured in the target vehicle to remind other vehicles around the target vehicle.
8. A protection device for a power cell, the device comprising:
the parameter acquisition module is used for acquiring a real-time temperature value, a real-time voltage value and a real-time smoke signal value of the target battery box;
the first execution module is used for injecting inert gas into the target battery box and recording gas injection time when the real-time temperature value is greater than or equal to a preset temperature threshold value, the real-time voltage value is less than or equal to a preset voltage threshold value and the real-time smoke signal value is out of a preset smoke signal range;
and the second execution module is used for injecting fire inhibitors into the target battery box to protect the power battery in the target battery box when the gas injection time is greater than or equal to a preset time threshold, the real-time temperature value is greater than or equal to the temperature threshold, the real-time voltage value is less than or equal to the voltage threshold and the real-time smoke signal value is out of the smoke signal range.
9. A terminal device, characterized in that the terminal device comprises: a memory, a processor and a protection program for a power battery stored in the memory and operable on the processor, which when executed by the processor, implements the steps of the protection method for a power battery as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a protection program for a power battery, which, when executed by a processor, implements the steps of the protection method for a power battery according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310202506.XA CN116190821A (en) | 2023-02-23 | 2023-02-23 | Protection method and device for power battery, terminal equipment and computer medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310202506.XA CN116190821A (en) | 2023-02-23 | 2023-02-23 | Protection method and device for power battery, terminal equipment and computer medium |
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| CN116190821A true CN116190821A (en) | 2023-05-30 |
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| CN202310202506.XA Pending CN116190821A (en) | 2023-02-23 | 2023-02-23 | Protection method and device for power battery, terminal equipment and computer medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454426A (en) * | 2023-06-16 | 2023-07-18 | 安徽中科中涣智能装备股份有限公司 | Method for controlling inert gas protection concentration of battery box |
| CN117848627A (en) * | 2024-03-06 | 2024-04-09 | 宁德时代新能源科技股份有限公司 | Air tightness detection method, air tightness detection device, storage medium, battery system and electricity utilization device |
-
2023
- 2023-02-23 CN CN202310202506.XA patent/CN116190821A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454426A (en) * | 2023-06-16 | 2023-07-18 | 安徽中科中涣智能装备股份有限公司 | Method for controlling inert gas protection concentration of battery box |
| CN116454426B (en) * | 2023-06-16 | 2023-08-22 | 安徽中科中涣智能装备股份有限公司 | Method for controlling inert gas protection concentration of battery box |
| CN117848627A (en) * | 2024-03-06 | 2024-04-09 | 宁德时代新能源科技股份有限公司 | Air tightness detection method, air tightness detection device, storage medium, battery system and electricity utilization device |
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