CN111856292B - Method and device for determining ignition position of battery pack - Google Patents
Method and device for determining ignition position of battery pack Download PDFInfo
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- CN111856292B CN111856292B CN201910265540.5A CN201910265540A CN111856292B CN 111856292 B CN111856292 B CN 111856292B CN 201910265540 A CN201910265540 A CN 201910265540A CN 111856292 B CN111856292 B CN 111856292B
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- 238000000034 method Methods 0.000 title claims abstract description 37
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229910052802 copper Inorganic materials 0.000 claims abstract description 50
- 239000010949 copper Substances 0.000 claims abstract description 50
- 238000003475 lamination Methods 0.000 claims abstract description 39
- 230000008859 change Effects 0.000 claims description 35
- 238000004590 computer program Methods 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 12
- 230000001788 irregular Effects 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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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
- H01M10/4285—Testing apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application provides a method and a device for determining ignition parts of a battery pack, wherein the method comprises the following steps: detecting the concave-convex direction of a target part in the battery pack; the target part comprises the side wall of each electric core in the battery pack or copper lamination of each electric core in the battery pack; and determining an initial ignition position of the battery pack according to the concave-convex direction of the target position. The method for determining the ignition position of the battery pack can determine the initial ignition position of the battery pack more simply and conveniently, and has lower cost.
Description
Technical Field
The application relates to the field of vehicles, in particular to a method and a device for determining ignition positions of a battery pack.
Background
Currently, as electric vehicles rapidly develop, corresponding electric vehicles are getting more and more on fire. In general, after the battery pack burns, the battery pack is severely damaged due to the chemical characteristics of the battery.
In the prior art, the internal structure of the battery pack can be observed by X-rays to judge whether the battery pack burns from the inside or the outside, however, this approach is not only costly, but also often makes it difficult to find the initial ignition point exactly.
It can be seen that the prior art has a problem that it is difficult to detect the initial ignition portion of the battery pack.
Disclosure of Invention
The embodiment of the application provides a method and a device for determining an ignition part of a battery pack, which are used for solving the problem that the initial ignition part of the battery pack is difficult to detect.
In a first aspect, an embodiment of the present application provides a method for determining a ignition location of a battery pack, the method including:
detecting the concave-convex direction of a target part in the battery pack; the target part comprises the side wall of each electric core in the battery pack or copper lamination of each electric core in the battery pack;
and determining an initial ignition position of the battery pack according to the concave-convex direction of the target position.
Optionally, the detecting the concave-convex direction of the target part in the battery pack includes:
detecting the concave-convex direction of the side wall of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is not damaged;
the determining the initial ignition position of the battery pack according to the concave-convex direction of the target position comprises the following steps:
determining a first cell in the battery pack as an initial ignition site of the battery pack;
the first battery cell is a battery cell with a first target side wall protruding outwards in the battery pack, and the first target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell.
Optionally, the variation condition of the width of the first electric core meets a first preset condition.
Optionally, the detecting the concave-convex direction of the target part in the battery pack includes:
detecting the concave-convex direction of copper laminations of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is damaged;
the determining the initial ignition position of the battery pack according to the concave-convex direction of the target position comprises the following steps:
determining a second cell in the battery pack as an initial ignition site of the battery pack;
the second battery cell is a battery cell with irregular concave-convex directions of the copper lamination in the battery pack.
Optionally, the detecting the concave-convex direction of the target part in the battery pack includes:
acquiring an image of the target site;
detecting the outline of the target part in the image;
and determining the concave-convex direction of the target part according to the outline of the target part.
Optionally, the target part is a side wall of each cell in the battery pack;
the determining the initial ignition position of the battery pack according to the concave-convex direction of the target position comprises the following steps:
acquiring a third electric core in the battery pack; the third battery cell is a battery cell with a second target side wall protruding outwards in the battery pack, and the second target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell;
acquiring the change condition of the width of the third battery cell according to the image;
and determining the third battery cell as an initial ignition position of the battery pack under the condition that the change condition of the width of the third battery cell meets a second preset condition.
Optionally, before determining that the third cell is the initial ignition portion of the battery pack, if the variation condition of the width of the third cell meets a second preset condition, the method further includes:
receiving model information of the battery pack input by a user;
and acquiring the second preset condition corresponding to the model information of the battery pack according to the corresponding relation between the preset model information and the preset condition.
In a second aspect, an embodiment of the present application further provides a device for determining a ignition location of a battery pack, including:
the detection module is used for detecting the concave-convex direction of the target part in the battery pack; the target part comprises the side wall of each electric core in the battery pack or copper lamination of each electric core in the battery pack;
and the determining module is used for determining an initial ignition position of the battery pack according to the concave-convex direction of the target position.
Optionally, the detection module is specifically configured to:
detecting the concave-convex direction of the side wall of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is not damaged;
the determining module is specifically configured to:
determining a first cell in the battery pack as an initial ignition site of the battery pack;
the first battery cell is a battery cell with a first target side wall protruding outwards in the battery pack, and the first target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell.
Optionally, the variation condition of the width of the first electric core meets a first preset condition.
Optionally, the detection module is specifically configured to:
detecting the concave-convex direction of copper laminations of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is damaged;
the determining module is specifically configured to:
determining a second cell in the battery pack as an initial ignition site of the battery pack;
the second battery cell is a battery cell with irregular concave-convex directions of the copper lamination in the battery pack.
Optionally, the detection module is specifically configured to:
acquiring an image of the target site;
detecting the outline of the target part in the image;
and determining the concave-convex direction of the target part according to the outline of the target part.
Optionally, the target part is a side wall of each cell in the battery pack;
the determining module is specifically configured to:
acquiring a third electric core in the battery pack; the third battery cell is a battery cell with a second target side wall protruding outwards in the battery pack, and the second target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell;
acquiring the change condition of the width of the third battery cell according to the image;
and determining the third battery cell as an initial ignition position of the battery pack under the condition that the change condition of the width of the third battery cell meets a second preset condition.
Optionally, the apparatus further includes:
the receiving module is used for receiving model information of the battery pack input by a user before determining that the third battery cell is an initial ignition part of the battery pack under the condition that the change condition of the width of the third battery cell meets a second preset condition;
the acquisition module is used for acquiring the second preset condition corresponding to the model information of the battery pack according to the corresponding relation between the preset model information and the preset condition.
In a third aspect, an embodiment of the present application further provides a device for determining a ignition location of a battery pack, including a processor, a memory, and a computer program stored in the memory and executable on the processor, where the computer program when executed by the processor implements the steps of the method for determining a ignition location of a battery pack described above.
In a fourth aspect, embodiments of the present application also provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor, implements the steps of the above-described battery pack ignition location determination method.
In the embodiment of the application, the concave-convex direction of the target part in the battery pack is detected; the target part comprises the side wall of each electric core in the battery pack or copper lamination of each electric core in the battery pack; the initial ignition position of the battery pack is determined according to the concave-convex direction of the target position, so that the initial ignition position of the battery pack can be determined more simply and conveniently, and the cost is lower.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 is a schematic structural view of a battery pack according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for determining a battery pack ignition location according to an embodiment of the present application;
fig. 3 is one of schematic structural diagrams of a battery pack after thermal runaway according to an embodiment of the present application;
fig. 4 is a second schematic structural view of a battery pack after thermal runaway according to an embodiment of the present application;
FIG. 5 is a schematic view of a copper laminate structure provided by an embodiment of the present application;
FIG. 6 is a schematic illustration of a copper laminate after thermal runaway according to an embodiment of the present application;
FIG. 7 is a schematic diagram showing a second embodiment of a copper laminate after thermal runaway;
fig. 8 is a block diagram of a battery pack ignition portion determining apparatus provided by an embodiment of the present application;
fig. 9 is a block diagram of a battery pack ignition portion determining apparatus according to still another embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment of the application provides a method for determining ignition parts of a battery pack. Each cell in the battery pack may include a housing, for example, an aluminum case. An alternative schematic of a battery pack may be shown in fig. 1, the battery pack comprising cells #1 to #6, wherein cell #1 is adjacent to a first modular end plate 11 of the battery pack and cell #6 is adjacent to a second modular end plate 12 of the battery pack. Note that the structure of the battery pack in the embodiment of the present application is not limited to the structure shown in fig. 1.
Referring to fig. 2, fig. 2 is a flowchart of a method for determining a ignition location of a battery pack according to an embodiment of the present application, as shown in fig. 2, including the steps of:
step 201, detecting the concave-convex direction of a target part in a battery pack; the target part comprises the side wall of each cell in the battery pack or copper lamination of each cell in the battery pack.
In this embodiment, the battery pack may be any battery pack in which combustion occurs. In practical application, if the battery pack is burnt from the inside, the internal structure of the battery pack is often damaged greatly, and the shell structure of each battery cell in the battery pack can be preserved relatively perfectly. If the battery pack is burned from the outside, the outer shell structure of each cell in the battery pack is often seriously damaged, and the inner structure of the battery pack is often less damaged. The target site may include a sidewall (also referred to as an end plate) of each cell in the battery pack, or a copper laminate of each cell in the battery pack.
And 202, determining an initial ignition position of the battery pack according to the concave-convex direction of the target position.
In practical application, after a certain electric core of the battery pack sends thermal runaway, the internal pressure of the battery pack can be increased, the electric core can expand, the side wall of the electric core can protrude outwards, and similarly, the copper lamination of the electric core can be influenced by the pressure and deform.
If the outer shell of the battery cell is not damaged, the battery cell which is initially ignited can be obtained by analysis based on the concave-convex direction of the side wall of each battery cell in the battery pack or the concave-convex direction of the copper lamination of the battery cell. In this case, if the initial ignition cells are obtained by analyzing based on the concave-convex directions of the copper laminations of the respective cells in the battery pack, it is generally necessary to disassemble the outer cases of the respective cells to detect the concave-convex directions of the copper laminations of the respective cells.
If the shell of the battery cell in the battery pack is damaged or even melted after a certain battery cell of the battery pack is out of control, the initial ignition battery cell can be obtained through analysis based on the concave-convex direction of the copper lamination of each battery cell in the battery pack.
The embodiment of the application detects the concave-convex direction of the target part in the battery pack; the target part comprises the side wall of each electric core in the battery pack or copper lamination of each electric core in the battery pack; and determining an initial ignition position of the battery pack according to the concave-convex direction of the target position. Compared with the prior art, the battery pack is characterized in that the internal structure of each battery cell is observed through respectively disassembling the shell of each battery cell to position the battery cell which is initially ignited, or the internal structure of each battery cell in the battery pack is analyzed through X-ray scanning of each battery cell to position the battery cell which is initially ignited. Not only is the implementation simpler, more convenient and faster, but also the cost is lower.
Optionally, the step 201, that is, detecting the concave-convex direction of the target portion in the battery pack, may include:
detecting the concave-convex direction of the side wall of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is not damaged;
the determining the initial ignition location of the battery pack according to the concave-convex direction of the target location in step 202 may include:
determining a first cell in the battery pack as an initial ignition site of the battery pack;
the first battery cell is a battery cell with a first target side wall protruding outwards in the battery pack, and the first target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell.
In this embodiment, under the condition that the casing of the battery cell in the battery pack is not damaged, the initial ignition position of the battery pack can be determined based on the concave-convex direction of the side wall of each battery cell, so that the implementation is simpler and more convenient. The first cell may be any cell in the battery pack, and the first target sidewall thereof protrudes outwards, where the first target sidewall may include one or more sidewalls.
For example, referring to fig. 3 and 4, when thermal runaway occurs in cell #2, the internal pressure of cell #2 increases, cell #2 expands, so that the side walls of cell #2 protrude outward and press the side walls of cell #1 and cell #3, causing the side walls of cell #1 and cell #3 adjacent to the side walls of cell #2 to be concave. In addition, the cell #1 and the cell #3 are subject to heat spreading, and the side walls of the cell #1 and the cell #3, which are not adjacent to the side walls of the cell #2, protrude outward, and it should be noted that the side walls of the cell #1, which are adjacent to the first module end plate 11, do not protrude outward due to the influence of the first module end plate 11. Similarly, the shape of the side walls of the cell as shown in fig. 4 can be obtained.
As can be seen from fig. 4, for the initial ignition cells, the sidewalls are generally convex, while the other cells are generally convex with a portion of the sidewalls and concave with a portion of the sidewalls, so that the initial ignition location of the battery pack can be determined based on the concave-convex direction of the sidewalls of each cell of the battery pack after combustion.
According to the embodiment of the application, under the condition that the shell of the battery cell in the battery pack is not damaged, the initial ignition part of the battery pack can be determined based on the concave-convex direction of the side wall of each battery cell, and the shell of each battery cell is not required to be disassembled to observe the internal structure, so that the battery pack is simple and convenient to realize and consumes less time.
Optionally, the variation condition of the width of the first electric core meets a first preset condition.
In the embodiment of the present application, the change condition of the width of the first electrical core may be a change amount of the width of the first electrical core, that is, a difference value between the width of the first electrical core before combustion and the width of the first electrical core after combustion; the ratio of the variation of the width of the first battery cell to the width of the first battery cell before combustion can also be adopted; the ratio of the width of the first cell after combustion to the width of the first cell before combustion may be also used.
Correspondingly, the first preset condition may be a threshold value set corresponding to a variation condition of the width of the first battery cell. For example, in the case where the change in the width of the first battery cell is the change in the width of the first battery cell, the first preset condition may be a first threshold, so that when the first target sidewall of the first battery cell protrudes outward and the change in the width of the first battery cell is greater than the first threshold, the first battery cell is determined to be the initial ignition portion of the battery pack; or in the case that the change of the width of the first battery cell is a ratio of the width of the first battery cell after combustion to the width of the first battery cell before combustion, the first preset condition may be a second threshold (for example, 120%), so that when the first target sidewall of the first battery cell protrudes outwards and the ratio of the width of the first battery cell after combustion to the width of the first battery cell before combustion is greater than the second threshold, the first battery cell is determined to be the initial ignition portion of the battery pack.
It should be noted that, for different types of battery packs, the corresponding first preset conditions may be different. For example, the second threshold may include a plurality of sub-thresholds (for example, 120%, 125%, 130%, etc.), and the corresponding sub-threshold may be obtained based on the model information of the battery pack for judgment during actual use, so as to improve accuracy of the result.
According to the embodiment of the application, the first battery cell is determined to be the initial ignition part of the battery pack under the condition that the change condition of the width of the first battery cell meets the first preset condition, so that the accuracy of a result can be improved.
Optionally, the step 201, that is, detecting the concave-convex direction of the target portion in the battery pack, may include:
detecting the concave-convex direction of copper laminations of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is damaged;
the determining the initial ignition location of the battery pack according to the concave-convex direction of the target location in step 202 may include:
determining a second cell in the battery pack as an initial ignition site of the battery pack;
the second battery cell is a battery cell with irregular concave-convex directions of the copper lamination in the battery pack.
In the embodiment of the application, under the condition that the shell of the battery cell in the battery pack is damaged, the initial ignition position of the battery pack is difficult to accurately determine through the external structure of the battery cell. At this time, the initial ignition site of the battery pack may be determined based on the shape of the copper laminations of each cell in the battery pack.
For example, the copper laminate structure of a normal cell (e.g., a cell in which no combustion occurs) may be such that no bending of the layers of copper laminate 21 occurs as shown in fig. 5. For the initially fired cells, the layers of the copper laminate 21 are typically bent in different directions, i.e., the copper laminate is irregularly embossed, as shown in fig. 6, some of the layers of the copper laminate 21 protrude in a first direction, some of the layers protrude in a second direction, and some of the layers are severely deformed in shape. While for other cells, i.e., cells in the battery pack other than the initially fired cell, the copper laminate 21 layers may be shaped as shown in fig. 7 with the copper laminate 21 layers protruding in the same direction.
According to the embodiment of the application, under the condition that the shell of the battery cell in the battery pack is damaged, the initial ignition part of the battery pack can be determined based on the concave-convex direction of the copper lamination of each battery cell, so that the battery pack is simple and convenient to realize, and the time consumption is less.
Optionally, the detecting the concave-convex direction of the target portion in the battery pack may include:
acquiring an image of the target site;
detecting the outline of the target part in the image;
and determining the concave-convex direction of the target part according to the outline of the target part.
In the embodiment of the application, the camera can be used for collecting images of all the battery cells in the battery pack, detecting the outline of the side wall of each battery cell in the images and determining the concave-convex direction of the side wall of each battery cell; or respectively collecting images of copper laminations of each battery cell in the battery pack, respectively detecting the outline of the copper laminations of each battery cell in each image, and determining the concave-convex direction of the copper laminations of each battery cell. The camera can be a natural light camera or an infrared camera.
In practical application, under the condition that the shell structure of the battery cell of the battery pack is not damaged, the camera can be used for shooting images aiming at the battery cell of the battery pack, and the shell contour of each battery cell is detected based on the shot images, so that the expansion direction of the battery shell is determined based on the shell contour of each battery cell, and then the initial ignition battery cell is positioned. Compared with the prior art, the battery cell is relatively simple and convenient to realize by respectively disassembling the shell of each battery cell to observe the internal structure of the battery cell so as to position the battery cell which is initially ignited, or respectively scanning each battery cell through X rays and analyzing the internal structure of the battery cell so as to position the battery cell which is initially ignited.
Under the condition that the shell structure of the battery cell of the battery pack is damaged, the camera can be used for respectively aligning copper lamination of each battery cell of the battery pack to shoot images, the profile of the copper lamination of the battery cell is detected based on the shot images of the copper lamination of the battery cell, the expansion direction of the battery shell is determined based on the profile of the copper lamination, and then the initial ignition battery cell is positioned.
According to the embodiment of the application, the concave-convex direction of the target part is determined by collecting and analyzing the image of the target part, so that the speed is high, and the user operation can be saved.
Optionally, the target part is a side wall of each cell in the battery pack;
the determining the initial ignition portion of the battery pack according to the concave-convex direction of the target portion may include:
acquiring a third electric core in the battery pack; the third battery cell is a battery cell with a second target side wall protruding outwards in the battery pack, and the second target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell;
acquiring the change condition of the width of the third battery cell according to the image;
and determining the third battery cell as an initial ignition position of the battery pack under the condition that the change condition of the width of the third battery cell meets a second preset condition.
For example, the change condition of the width of the third cell may be calculated according to the image and the preset template image, and for example, the change amount of the width of the third cell may be calculated based on the image and the preset template image. The template image may be an image of a side wall of each cell including a reference battery pack, and the image acquisition parameter of the template image is identical to the image acquisition parameter of the image, and the reference battery pack is the same as the battery pack in type.
For another example, the current width of the third cell, that is, the width after combustion, may be directly calculated according to the image, so that the amount of change in the width of the third cell may be calculated according to the current width of the third cell and a preset width value (for example, the width of the cell before combustion is preset), or the ratio of the width of the third cell after combustion to the preset width value may be calculated.
The second preset condition may be a threshold value set corresponding to a variation of the width of the third cell. For example, in the case where the change in the width of the third cell is the change in the width of the third cell, the second preset condition may be a first threshold, so that, in the case where the second target sidewall of the third cell protrudes outward and the change in the width of the third cell is greater than the first threshold, the third cell is determined to be the initial ignition portion of the battery pack; or in the case that the change of the width of the third battery cell is a ratio of the width of the third battery cell after combustion to the width of the third battery cell before combustion, the second preset condition may be a second threshold (for example, 120%), so that when the second target sidewall of the third battery cell protrudes outward and the ratio of the width of the third battery cell after combustion to the width of the third battery cell before combustion is greater than the second threshold, the third battery cell is determined to be the initial ignition portion of the battery pack.
According to the embodiment of the application, based on the change condition of the width of the third battery cell obtained according to the image, manual operation can be reduced, and in addition, under the condition that the change condition of the width of the third battery cell meets a second preset condition, the third battery cell is determined to be an initial ignition position of the battery pack, so that accuracy of a result can be improved.
Optionally, before determining that the third cell is the initial ignition portion of the battery pack, the method may further include:
receiving model information of the battery pack input by a user;
and acquiring the second preset condition corresponding to the model information of the battery pack according to the corresponding relation between the preset model information and the preset condition.
In practical situations, the width of the battery pack after combustion often varies from one model to another. According to the embodiment of the application, the corresponding relation between the model information and the preset conditions is preset, so that the preset conditions (namely the second preset conditions) corresponding to the model information of the battery pack can be obtained rapidly based on the corresponding relation, whether the third battery cell is the initial ignition battery cell can be judged based on the preset conditions corresponding to the model information of the battery pack, and the accuracy of a judging result can be improved.
Referring to fig. 8, fig. 8 is a block diagram of a battery pack ignition portion determining apparatus according to an embodiment of the present application. As shown in fig. 8, the battery pack ignition portion determining apparatus 800 includes:
a detection module 801, configured to detect a concave-convex direction of a target portion in a battery pack; the target part comprises the side wall of each electric core in the battery pack or copper lamination of each electric core in the battery pack;
a determining module 802 is configured to determine an initial ignition location of the battery pack according to the concave-convex direction of the target location.
Optionally, the detection module is specifically configured to:
detecting the concave-convex direction of the side wall of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is not damaged;
the determining module is specifically configured to:
determining a first cell in the battery pack as an initial ignition site of the battery pack;
the first battery cell is a battery cell with a first target side wall protruding outwards in the battery pack, and the first target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell.
Optionally, the variation condition of the width of the first electric core meets a first preset condition.
Optionally, the detection module is specifically configured to:
detecting the concave-convex direction of copper laminations of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is damaged;
the determining module is specifically configured to:
determining a second cell in the battery pack as an initial ignition site of the battery pack;
the second battery cell is a battery cell with irregular concave-convex directions of the copper lamination in the battery pack.
Optionally, the detection module is specifically configured to:
acquiring an image of the target site;
detecting the outline of the target part in the image;
and determining the concave-convex direction of the target part according to the outline of the target part.
Optionally, the target part is a side wall of each cell in the battery pack;
the determining module is specifically configured to:
acquiring a third electric core in the battery pack; the third battery cell is a battery cell with a second target side wall protruding outwards in the battery pack, and the second target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell;
acquiring the change condition of the width of the third battery cell according to the image;
and determining the third battery cell as an initial ignition position of the battery pack under the condition that the change condition of the width of the third battery cell meets a second preset condition.
Optionally, the apparatus further includes:
the receiving module is used for receiving model information of the battery pack input by a user before determining that the third battery cell is an initial ignition part of the battery pack under the condition that the change condition of the width of the third battery cell meets a second preset condition;
the acquisition module is used for acquiring the second preset condition corresponding to the model information of the battery pack according to the corresponding relation between the preset model information and the preset condition.
The battery pack ignition portion determining apparatus 800 can implement the respective processes of the battery pack ignition portion determining method of the above-described method embodiment, and achieve the same effects to avoid repetition, and will not be described herein again.
The battery pack ignition position determining device 800, the detecting module 801, is configured to detect a concave-convex direction of a target position in a battery pack; the target part comprises the side wall of each electric core in the battery pack or copper lamination of each electric core in the battery pack; a determining module 802 is configured to determine an initial ignition location of the battery pack according to the concave-convex direction of the target location. The initial ignition position of the battery pack can be determined more simply and conveniently, and the cost is lower.
The embodiment of the application also provides a battery pack ignition position determining device, which comprises a processor, a memory and a computer program stored on the memory and capable of running on the processor, wherein the computer program realizes each process of the battery pack ignition position determining method of any one of the method embodiments when being executed by the processor, and can achieve the same technical effect, and in order to avoid repetition, the description is omitted.
The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements each process of the above method for determining the ignition position of the battery pack, and can achieve the same technical effect, and in order to avoid repetition, the description is omitted here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
Referring to fig. 9, fig. 9 is a block diagram of a battery pack ignition portion determining apparatus according to still another embodiment of the present application, and as shown in fig. 9, a battery pack ignition portion determining apparatus 900 includes: a processor 901, a memory 902 and a computer program stored and executable on said memory 902, the components of the battery pack ignition location determination apparatus 900 being coupled together by a bus interface 903, said computer program when executed by said processor 901 performing the steps of:
detecting the concave-convex direction of a target part in the battery pack; the target part comprises the side wall of each cell in the battery pack or copper lamination of each cell in the battery pack.
And determining an initial ignition position of the battery pack according to the concave-convex direction of the target position.
Optionally, the computer program when executed by the processor 901 is further configured to:
detecting the concave-convex direction of the side wall of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is not damaged;
the computer program, when executed by the processor 901, is further adapted to:
determining a first cell in the battery pack as an initial ignition site of the battery pack;
the first battery cell is a battery cell with a first target side wall protruding outwards in the battery pack, and the first target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell.
Optionally, the variation condition of the width of the first electric core meets a first preset condition.
Optionally, the computer program when executed by the processor 901 is further configured to:
detecting the concave-convex direction of copper laminations of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is damaged;
the computer program, when executed by the processor 901, is further adapted to:
determining a second cell in the battery pack as an initial ignition site of the battery pack;
the second battery cell is a battery cell with irregular concave-convex directions of the copper lamination in the battery pack.
Optionally, the computer program when executed by the processor 901 is further configured to:
acquiring an image of the target site;
detecting the outline of the target part in the image;
and determining the concave-convex direction of the target part according to the outline of the target part.
Optionally, the target part is a side wall of each cell in the battery pack;
the computer program, when executed by the processor 901, is further adapted to:
acquiring a third electric core in the battery pack; the third battery cell is a battery cell with a second target side wall protruding outwards in the battery pack, and the second target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell;
acquiring the change condition of the width of the third battery cell according to the image;
and determining the third battery cell as an initial ignition position of the battery pack under the condition that the change condition of the width of the third battery cell meets a second preset condition.
Optionally, the computer program when executed by the processor 901 is further configured to:
receiving model information of the battery pack input by a user before determining that the third battery cell is an initial ignition position of the battery pack under the condition that the change condition of the width of the third battery cell meets a second preset condition;
and acquiring the second preset condition corresponding to the model information of the battery pack according to the corresponding relation between the preset model information and the preset condition.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present application.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (12)
1. A method of determining a battery ignition location, comprising:
detecting a concave-convex direction of a target portion in a battery pack, comprising: detecting concave-convex directions of side walls of all the battery cells in the battery pack under the condition that the outer shell of each battery cell in the battery pack is not damaged, wherein the side walls of the battery cells for initial ignition are generally convex outwards, while the side walls of other battery cells are generally convex outwards, and the side walls of the battery cells are concave inwards; detecting the concave-convex direction of copper laminations of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is damaged; the target part comprises the side wall of each electric core in the battery pack or copper lamination of each electric core in the battery pack;
determining an initial ignition site of the battery pack according to the concave-convex direction of the target site, comprising: determining a first cell in the battery pack as an initial ignition site of the battery pack; the first battery cell is a battery cell with a first target side wall protruding outwards in the battery pack, and the first target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell; determining a second cell in the battery pack as an initial ignition site of the battery pack; the second battery cell is a battery cell with irregular concave-convex directions of the copper lamination in the battery pack.
2. The method of claim 1, wherein the variation in the width of the first cell satisfies a first predetermined condition.
3. The method of claim 1, wherein detecting the direction of the irregularities of the target site in the battery pack comprises:
acquiring an image of the target site;
detecting the outline of the target part in the image;
and determining the concave-convex direction of the target part according to the outline of the target part.
4. The method of claim 3, wherein the target site is a sidewall of each cell in the battery pack;
the determining the initial ignition position of the battery pack according to the concave-convex direction of the target position comprises the following steps:
acquiring a third electric core in the battery pack; the third battery cell is a battery cell with a second target side wall protruding outwards in the battery pack, and the second target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell;
acquiring the change condition of the width of the third battery cell according to the image;
and determining the third battery cell as an initial ignition position of the battery pack under the condition that the change condition of the width of the third battery cell meets a second preset condition.
5. The method of claim 4, wherein the method further comprises, before determining that the third cell is the initial ignition site of the battery pack if the change in the width of the third cell satisfies a second preset condition:
receiving model information of the battery pack input by a user;
and acquiring the second preset condition corresponding to the model information of the battery pack according to the corresponding relation between the preset model information and the preset condition.
6. A battery pack ignition portion determining apparatus, comprising:
the detection module is used for detecting the concave-convex direction of the target part in the battery pack; the target part comprises the side wall of each electric core in the battery pack or copper lamination of each electric core in the battery pack;
a determining module, configured to determine an initial ignition location of the battery pack according to a concave-convex direction of the target location;
the detection module is specifically used for: detecting the concave-convex direction of the side wall of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is not damaged;
the determining module is specifically configured to: determining a first cell in the battery pack as an initial ignition site of the battery pack; the first battery cell is a battery cell with a first target side wall protruding outwards in the battery pack, and the first target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell;
the detection module is specifically used for: detecting the concave-convex direction of copper laminations of each battery cell in the battery pack under the condition that the shell of the battery cell in the battery pack is damaged;
the determining module is specifically configured to: determining a second cell in the battery pack as an initial ignition site of the battery pack; the second battery cell is a battery cell with irregular concave-convex directions of the copper lamination in the battery pack.
7. The apparatus of claim 6, wherein the variation in the width of the first cell satisfies a first predetermined condition.
8. The apparatus of claim 6, wherein the detection module is specifically configured to:
acquiring an image of the target site;
detecting the outline of the target part in the image;
and determining the concave-convex direction of the target part according to the outline of the target part.
9. The device of claim 8, wherein the target site is a sidewall of each cell in the battery pack;
the determining module is specifically configured to:
acquiring a third electric core in the battery pack; the third battery cell is a battery cell with a second target side wall protruding outwards in the battery pack, and the second target side wall is a side wall, which is not adjacent to a module end plate of the battery pack, in the battery cell;
acquiring the change condition of the width of the third battery cell according to the image;
and determining the third battery cell as an initial ignition position of the battery pack under the condition that the change condition of the width of the third battery cell meets a second preset condition.
10. The apparatus of claim 9, wherein the apparatus further comprises:
the receiving module is used for receiving model information of the battery pack input by a user before determining that the third battery cell is an initial ignition part of the battery pack under the condition that the change condition of the width of the third battery cell meets a second preset condition;
the acquisition module is used for acquiring the second preset condition corresponding to the model information of the battery pack according to the corresponding relation between the preset model information and the preset condition.
11. A battery pack ignition location determination apparatus comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of the battery pack ignition location determination method of any one of claims 1 to 5.
12. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the battery ignition location determination method according to any one of claims 1 to 5.
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