CN115091959A - Battery pack early warning system, early warning method, vehicle and storage medium - Google Patents
Battery pack early warning system, early warning method, vehicle and storage medium Download PDFInfo
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- CN115091959A CN115091959A CN202210844071.4A CN202210844071A CN115091959A CN 115091959 A CN115091959 A CN 115091959A CN 202210844071 A CN202210844071 A CN 202210844071A CN 115091959 A CN115091959 A CN 115091959A
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- 230000002159 abnormal effect Effects 0.000 claims abstract description 18
- 230000015654 memory Effects 0.000 claims description 14
- 238000004590 computer program Methods 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
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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
-
- 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
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
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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
-
- 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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- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery pack early warning system, an early warning method, a vehicle and a storage medium. The battery pack early warning system comprises a box body, an acoustic waveguide, an acoustic grating and a signal collector; a plurality of single batteries are arranged in the box body; the sound wave guide pipe is arranged outside the box body; the first end of the sound wave guide pipe is connected to the box body and communicated with the box body, so that sound waves of sound in the box body can be transmitted to the outside through the sound wave guide pipe; the acoustic wave grating is arranged in the acoustic wave guide tube, and the acoustic wave can cause the vibration deformation of the acoustic wave grating through the acoustic wave grating; the signal collector is arranged at the acoustic wave grating and used for collecting deformation signals of the acoustic wave grating. The battery pack early warning method obtains a safety coefficient according to the maximum deformation quantity of the acoustic wave grating by obtaining the maximum deformation quantity, and if the safety coefficient is lower than a set critical safety coefficient value, the abnormal state of the battery pack can be directly judged. The early warning method is visual and simple, and can finish early warning timely and accurately.
Description
Technical Field
The invention relates to the technical field of battery packs, in particular to a battery pack early warning system, an early warning method, a vehicle and a storage medium.
Background
The power battery is a power part of a new energy automobile, and the power battery is often assembled on the vehicle in the form of a battery pack, so the safety and stability of the battery pack are particularly important for the vehicle. In the prior art, the battery pack is poor in quality or improper in use, so that thermal runaway is easily caused, and then the vehicle is ignited or detonated, so that the safety of drivers and conductors is threatened.
It is now common to monitor thermal runaway conditions by arranging temperature or smoke sensors; firstly, the arrangement number and the arrangement positions of the temperature sensors and the smoke sensors are limited, temperature and smoke detection cannot be carried out on each single battery in the battery pack, and thermal runaway of a certain single battery can cause thermal runaway of an adjacent battery pack or even the whole battery pack; furthermore, when the smoke sensor detects smoke, it indicates that thermal runaway of the battery pack has progressed to a stage where further intervention is late. Therefore, the existing battery pack has the problems of difficult thermal runaway monitoring and inaccurate and timely early warning.
Therefore, it is desirable to provide a battery pack warning system, a warning method, a vehicle and a storage medium to solve the above problems.
Disclosure of Invention
The invention aims to provide a battery pack early warning system, an early warning method, a vehicle and a storage medium, and aims to solve the problems that in the prior art, a battery pack is difficult to monitor thermal runaway and cannot be early warned accurately and timely.
In order to realize the purpose, the following technical scheme is provided:
a battery pack warning system, comprising:
the battery pack comprises a box body, a battery pack and a battery pack, wherein a plurality of single batteries are arranged in the box body;
the sound wave guide pipe is arranged outside the box body; the sound wave guide tube is provided with a first end and a second end along the length direction, and the first end of the sound wave guide tube is connected to the box body and communicated with the box body;
an acoustic grille disposed within the acoustic waveguide;
and the signal collector is arranged at the acoustic wave grating and used for collecting the deformation signal of the acoustic wave grating.
Further, the acoustic grille is disposed at the first end of the acoustic waveguide.
Further, the outer periphery of the case is coated with a sound insulating member.
Further, the acoustic wave grating is in a cross-shaped grating structure.
Further, the second end of the acoustic waveguide is provided with a vent valve; or
An explosion-proof valve is arranged at the second end of the acoustic waveguide.
A battery pack early warning method for the battery pack early warning system comprises the following steps:
s100: acquiring the maximum deformation D of the acoustic wave grating by using the signal acquisition device 1 ；
S200: according to the formula
For maximum deformation quantity D 1 Fitting to obtain fitted deformation D 2 (ii) a Wherein A is an included angle between the acoustic wave grating and the acoustic wave guide tube, and B is an acoustic wave enhancement weighting system; c is a grid structure strength weighting coefficient;
s300: calculating to obtain a safety factor K,
wherein T is the deformation amount of the acoustic wave grating when the whole battery pack is in a critical thermal runaway state;
s400: and when K is less than 2, judging that the state of the battery pack is abnormal, and giving an early warning.
Further, in step S400:
when K is more than or equal to 1.7 and less than 2, the early warning battery pack is in a general abnormal state;
when K is more than or equal to 1.4 and less than 1.7, the battery pack is in a serious abnormal state;
when K is more than or equal to 1.1 and less than 1.4, early warning that the battery pack is in a limit abnormal state;
and when K is less than 1.1, early warning that the battery pack is out of control due to heat and sending a passenger escape signal.
Further, in step S200, the value ranges of A, B, C are: 63 ° < a <90 °, 0.81< B <0.86, 0.27< C < 0.35.
A vehicle, the vehicle comprising:
one or more processors;
a memory for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement any of the battery pack warning methods described above.
A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements any of the battery pack warning methods described above.
Compared with the prior art, the invention has the following beneficial effects:
the battery pack early warning system adopts the matching of the acoustic wave grating and the acoustic wave guide pipe to obtain the thermal runaway condition in the battery pack; specifically, when a certain single battery in the battery pack is out of control due to heat, sound is emitted from the inside of the battery pack, sound waves of the sound are transmitted to the outside through the sound wave guide pipe, the sound waves drive the built-in sound wave grating to vibrate when passing through the sound wave guide pipe, sound wave signals of the battery out of control due to heat are converted into deformation signals of the sound wave grating, and then the out of control due to heat in the battery pack can be timely and accurately obtained according to the deformation signals;
the battery pack early warning method obtains the maximum deformation amount of the acoustic wave grating, fits the maximum deformation amount, and obtains a safety coefficient after comparing the fitted deformation amount with the deformation amount of the acoustic wave grating when the whole battery pack is in a critical thermal runaway state; according to the early warning method, the battery pack state is more directly represented through the arrangement of the safety coefficient, early warning can be directly carried out according to the value of the safety coefficient, the early warning method is visual and simple, and the battery pack state can be timely and accurately early warned.
Drawings
Fig. 1 is a schematic structural diagram of a battery pack warning system according to an embodiment of the present invention;
FIG. 2 is a perspective view of a battery pack warning system according to an embodiment of the present invention;
fig. 3 is a flowchart of a battery pack warning method according to an embodiment of the present invention.
Reference numerals:
10. a box body; 20. an acoustic waveguide; 30. a sonic grille; 40. a sound barrier.
Detailed Description
The following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment provides a battery pack early warning system; the battery Pack in this embodiment is a CTP (Cell To Pack, in which battery cores are integrated into the battery Pack) framework, and therefore, once thermal runaway of a certain battery Cell occurs, the thermal runaway of the adjacent battery Cell is easily diffused, and then thermal runaway of the whole battery Pack is caused.
Referring to fig. 1 and 2, the battery pack warning system specifically includes a case 10, an acoustic waveguide 20, an acoustic grille 30, and a signal collector (not shown in the drawings); a plurality of single batteries are arranged in the box body 10, and the box body 10 and the single batteries in the box body 10 form a complete battery pack; specifically, the acoustic waveguide 20 has a first end and a second end along the length, both the first end and the second end of the acoustic waveguide 20 being provided with an opening; in specific implementation, the sound wave guide tube 20 is disposed outside the case body 10, and a first end of the sound wave guide tube 20 is connected to the case body 10 and is communicated with the case body 10, so that sound waves of sound inside the case body 10 can be transmitted to the outside through the sound wave guide tube 20. The acoustic grille 30 is disposed within the acoustic waveguide 20 such that the acoustic wave passes through the acoustic grille 30, causing a vibrational deformation of the acoustic grille 30. The signal collector is arranged at the acoustic wave grating 30 and used for collecting the deformation signal of the acoustic wave grating 30.
The battery pack early warning system of the invention adopts the matching of the acoustic wave grating 30 and the acoustic wave guide tube 20 to obtain the thermal runaway condition in the battery pack; specifically, can be in the inside sound of making when the inside some battery cell thermal runaway of battery package, the sound wave of sound transmits to the outside via sound wave guide pipe 20, and the sound wave drives built-in sound wave grille 30 and takes place the vibration when sound wave process sound wave guide pipe 20, turns into the deformation signal of sound wave grille 30 with the sound wave signal of battery thermal runaway, and then just can be in time and accurately obtain the inside thermal runaway condition of battery package according to the deformation signal.
Specifically, the acoustic grille 30 is disposed at the first end of the acoustic waveguide 20, that is, the acoustic wave passes through the acoustic grille 30 after exiting from the cabinet 10, so as to avoid the situation that the acoustic wave propagates in the acoustic waveguide 20 for a long time and is attenuated, which results in failure to accurately transmit the thermal runaway inside the cabinet 10.
Furthermore, the outer periphery of the box body 10 is covered with a sound insulation member 40 for isolating the sound in the box body 10, so that the sound is transmitted only through the sound wave guide tube 20 as far as possible, and is prevented from being emitted from other places, which is helpful for improving the accuracy of the early warning system. Alternatively, the sound insulator 40 is soundproof cotton or aerogel.
The acoustic grille 30 is generally a mesh structure, and the sound waves do not obstruct the propagation of the sound waves when passing through the acoustic grille 30, but induce the vibration of the acoustic grille 30. In this embodiment, the acoustic grille 30 is a cross-shaped grille structure, i.e., the grid thereof is rectangular; of course, in some other embodiments, the acoustic grille 30 is not limited to a cross-shaped grille structure, and in particular, the mesh of the net-shaped structure of the acoustic grille 30 may also be diamond-shaped or triangular. Alternatively, the acoustic grille 30 may be made of a ferrous material.
Furthermore, when the single battery in the battery pack is out of control due to heat, the air pressure in the battery pack can be increased, and if the pressure cannot be timely relieved and the pressure is increased to a critical out of control state of the battery pack, the battery pack can explode and spread to other normal single batteries, and even the whole battery pack is scrapped. Therefore, a vent valve or an explosion-proof valve can be arranged at the second end of the acoustic waveguide 20, that is, the acoustic waveguide 20 is used as a pressure relief channel, the function of the vent valve or the explosion-proof valve is the same as that of the battery pack, the vent valve or the explosion-proof valve can perform the pressure relief function on the battery pack, and the spread of thermal runaway can be effectively prevented.
Specifically, the signal collector is a vibration sensor, which can obtain a vibration signal of the acoustic grille 30, and convert the vibration signal into an electric signal to be transmitted to a control system of the warning system. In one embodiment, the vibration signal of the acoustic grille 30 includes, but is not limited to, the maximum deformation D of the acoustic grille 30 1 。
The embodiment also provides a battery pack early warning method, which is completed by using the battery pack early warning system; specifically, referring to fig. 3, the battery pack warning method includes the following steps:
s100: the maximum deformation D of the acoustic wave grating 30 is collected by the signal collector 1 ；
S200: according to the formula
For maximum deformationQuantity D 1 Fitting to obtain fitted deformation D 2 (ii) a Wherein A is an included angle between the acoustic grille 30 and the acoustic duct 20, and B is an acoustic wave enhancement weighting system; c is a grid structure strength weighting coefficient;
s300: calculating to obtain a safety coefficient K of the system,
wherein T is the deformation amount of the acoustic wave grating 30 when the whole battery pack is in a critical thermal runaway state;
s400: and when K is less than 2, judging that the battery pack is abnormal in state, and giving an early warning.
In specific implementation, in step S400, the early warning situations are as follows:
when K is more than or equal to 1.7 and less than 2, the battery pack is early warned to be in a general abnormal state;
when K is more than or equal to 1.4 and less than 1.7, the battery pack is early warned to be in a serious abnormal state;
when K is more than or equal to 1.1 and less than 1.4, early warning that the battery pack is in a limit abnormal state;
and when K is less than 1.1, early warning that the battery pack is out of control due to heat and sending a passenger escape signal.
When the battery pack is actually out of control thermally, the sound generated by the battery pack is larger and larger, and the maximum deformation quantity D of the acoustic wave grating 30 is caused 1 The safety coefficient K is lower and lower; namely, the lower the safety coefficient K is, the more serious the abnormal state of the battery pack is, the more alert the battery pack needs to be; when the safety coefficient K is low to a certain value, the thermal runaway of the whole battery pack can be directly warned, and an escape signal is sent out to timely remind passengers on the vehicle to escape. Due to the arrangement of the plurality of early warning states, the reasonable hierarchical division of the abnormal states of the battery pack is realized, and drivers and conductors can visually acquire the specific thermal runaway condition of the battery pack; in addition, a plurality of early warning states are set, so that drivers and conductors can also know the development trend of thermal runaway of the battery pack and perform related intervention or implement precautionary measures in advance.
Specifically, in step S200, the value range of A, B, C is divided into: 63 ° < a <90 °, 0.81< B <0.86, 0.27< C < 0.35.
According to the battery pack early warning method, the maximum deformation quantity of the acoustic wave grating 30 is obtained, the maximum deformation quantity is fitted, the fitted deformation quantity is compared with the deformation quantity of the acoustic wave grating 30 when the whole battery pack is in a critical thermal runaway state, and then a safety coefficient K is obtained, the thermal runaway situation is more severe and complex, the larger the abnormal sound in the battery pack is, the larger the deformation quantity of the acoustic wave grating 30 is, the lower the safety coefficient K is, a critical safety coefficient value (2 in the embodiment) is set at the moment, and if the safety coefficient is lower than the critical safety coefficient value, the abnormal state judgment of the battery pack can be directly carried out; according to the early warning method, the battery pack state is more directly represented through the arrangement of the safety coefficient, early warning can be directly carried out according to the value of the safety coefficient, the early warning method is visual and simple, and early warning can be timely and accurately completed.
Example two
The second embodiment of the present invention further provides a vehicle, and the components of the vehicle may include but are not limited to: the vehicle includes a vehicle body, one or more processors, memory, and a bus connecting the various system components (including the memory and the processors).
The memory is used as a computer readable storage medium for storing software programs, computer executable programs, and modules, such as program instructions corresponding to the battery pack warning method in the embodiment of the present invention. The processor executes various functional applications and data processing of the vehicle by running software programs, instructions and modules stored in the memory, that is, the battery pack warning method is realized.
The memory can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system and an application program required by at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory may further include memory remotely located from the processor, and these remote memories may be connected to the vehicle over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
EXAMPLE III
The third embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a battery pack warning method, and the battery pack warning method includes the following steps:
s100: the maximum deformation D of the acoustic wave grating 30 is collected by the signal collector 1 ；
S200: according to the formula
For maximum deformation D 1 Fitting to obtain fitted deformation D 2 (ii) a Wherein A is an included angle between the acoustic grille 30 and the acoustic duct 20, and B is an acoustic wave enhancement weighting system; c is a grid structure strength weighting coefficient;
s300: calculating to obtain a safety factor K,
wherein T is the deformation amount of the acoustic wave grating 30 when the whole battery pack is in a critical thermal runaway state;
s400: and when K is less than 2, judging that the state of the battery pack is abnormal, and giving an early warning.
Of course, the computer-readable storage medium provided in the embodiments of the present invention has computer-executable instructions that are not limited to the method operations described above, and may also perform related operations in the battery pack warning method provided in any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
In the above embodiment, each included unit and module is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. A battery pack warning system, comprising:
a case (10), wherein a plurality of single batteries are arranged in the case (10);
an acoustic waveguide (20), the acoustic waveguide (20) being disposed outside the tank (10); the acoustic waveguide (20) is provided with a first end and a second end along the length direction, and the first end of the acoustic waveguide (20) is connected to the box body (10) and communicated with the box body (10);
a sonic grille (30), said sonic grille (30) disposed within said sonic duct (20);
the signal collector is arranged at the acoustic wave grating (30) and used for collecting deformation signals of the acoustic wave grating (30).
2. The battery pack warning system of claim 1, wherein the acoustic grille (30) is disposed at the first end of the acoustic waveguide (20).
3. The battery pack warning system as claimed in claim 1, wherein the outer circumference of the case (10) is coated with a sound insulating member (40).
4. The battery pack warning system of claim 1, wherein the acoustic grille (30) is a cross-shaped grille structure.
5. The battery pack warning system of claim 1, wherein the second end of the acoustic waveguide (20) is provided with a vent valve; or
An explosion-proof valve is arranged at the second end of the acoustic waveguide (20).
6. A battery pack warning method for use in the battery pack warning system according to any one of claims 1 to 5, comprising the steps of:
s100: the signal collector is used for collecting the maximum deformation D of the acoustic wave grating (30) 1 ；
S200: according to the formula
For maximum deformation quantity D 1 Fitting to obtain fitted deformation D 2 (ii) a Wherein A is an included angle between the acoustic wave grating (30) and the acoustic wave guide tube (20), and B is an acoustic wave enhancement weighting system; c is a grid structure strength weighting coefficient;
s300: calculating to obtain a safety factor K,
wherein T is the wholeThe amount of deformation of the acoustic grille (30) when the battery pack is in a critical thermal runaway state;
s400: and when K is less than 2, judging that the state of the battery pack is abnormal, and giving an early warning.
7. The battery pack warning method according to claim 6, wherein in step S400:
when K is more than or equal to 1.7 and less than 2, the battery pack is early warned to be in a general abnormal state;
when K is more than or equal to 1.4 and less than 1.7, the battery pack is early warned to be in a serious abnormal state;
when K is more than or equal to 1.1 and less than 1.4, early warning that the battery pack is in a limit abnormal state;
and when K is less than 1.1, early warning that the battery pack is out of control due to heat and sending a passenger escape signal.
8. The battery pack early warning method according to claim 6, wherein in step S200, the value ranges of A, B, C are as follows: 63 ° < a <90 °, 0.81< B <0.86, 0.27< C < 0.35.
9. A vehicle, characterized by comprising:
one or more processors;
a memory for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the battery pack warning method of any of claims 6-8.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the battery pack warning method according to any one of claims 6 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210844071.4A CN115091959B (en) | 2022-07-18 | 2022-07-18 | Battery pack early warning system, early warning method, vehicle and storage medium |
| PCT/CN2023/107357 WO2024017147A1 (en) | 2022-07-18 | 2023-07-14 | Battery-pack early warning system and early warning method, and vehicle and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210844071.4A CN115091959B (en) | 2022-07-18 | 2022-07-18 | Battery pack early warning system, early warning method, vehicle and storage medium |
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| CN115091959A true CN115091959A (en) | 2022-09-23 |
| CN115091959B CN115091959B (en) | 2024-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024017147A1 (en) * | 2022-07-18 | 2024-01-25 | 中国第一汽车股份有限公司 | Battery-pack early warning system and early warning method, and vehicle and storage medium |
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| CN115091959B (en) * | 2022-07-18 | 2024-08-13 | 中国第一汽车股份有限公司 | Battery pack early warning system, early warning method, vehicle and storage medium |
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| WO2024017147A1 (en) | 2024-01-25 |
| CN115091959B (en) | 2024-08-13 |
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