CN114019263A - Battery thermal runaway experimental device - Google Patents
Battery thermal runaway experimental device Download PDFInfo
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- CN114019263A CN114019263A CN202010688172.8A CN202010688172A CN114019263A CN 114019263 A CN114019263 A CN 114019263A CN 202010688172 A CN202010688172 A CN 202010688172A CN 114019263 A CN114019263 A CN 114019263A
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- 238000004088 simulation Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 2
- 230000004308 accommodation Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 13
- 230000003028 elevating effect Effects 0.000 description 7
- 230000001629 suppression Effects 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002023 wood Substances 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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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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
- G01R31/003—Environmental or reliability tests
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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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- Battery Mounting, Suspending (AREA)
Abstract
The application relates to a battery thermal runaway experimental device, which comprises a guide assembly, a first lifting plate, a second lifting plate and a simulation battery pack. First lifter plate and second lifter plate all slide to set up in direction subassembly. The simulation battery pack is arranged between the first lifting plate and the second lifting plate. The simulation battery pack is fixedly arranged relative to the second lifting plate. When first lifter plate reciprocates along vertical direction, can drive the motion of simulation battery package in vertical direction, consequently can adjust the distance of first lifter plate relative to ground. The second lifting plate is arranged on one side, far away from the ground, of the first lifting plate, so that the distance between the second lifting plate and the simulation battery pack can be adjusted by adjusting the distance between the second lifting plate and the first lifting plate. So that the surrounding space of the top and the bottom of the simulated battery pack is the same as the surrounding space of the real battery after being loaded. Therefore, the accuracy of the simulation experiment can be greatly improved.
Description
Technical Field
The application relates to the technical field of new energy, in particular to a thermal runaway experimental device for a battery.
Background
With the development of lithium ion battery technology, the safety problem of lithium ion batteries is also more and more emphasized by people. The battery pack thermal runaway suppression test is an effective mode for researching the thermal runaway parameters of the battery pack and suppressing the thermal runaway of the battery pack.
In the conventional technology, the thermal runaway suppression test of the battery pack is generally carried out in an open environment or an explosion-proof box. However, the real working environment of the battery pack cannot be simulated in an open environment or in an explosion-proof box. In a battery pack thermal runaway suppression test in the conventional technology, the forms of convection, radiation and conduction of heat generated by thermal runaway of a lithium ion battery in a battery pack are different from the real working environment of the battery pack in a vehicle, so that the accuracy of experimental data is influenced.
Disclosure of Invention
Based on this, it is necessary to provide a battery thermal runaway experimental apparatus for solving the problem that the accuracy of experimental data is affected because the convection, radiation and conduction modes of a large amount of heat generated by the thermal runaway of the lithium ion battery in the battery pack are different from the real working environment of the battery pack in the vehicle.
A battery thermal runaway experimental apparatus, comprising:
a guide assembly;
the first lifting plate and the second lifting plate are arranged on the guide assembly in a sliding mode; and
the simulation battery pack is arranged between the first lifting plate and the second lifting plate and is fixedly arranged relative to the second lifting plate.
In one embodiment, further comprising:
the first driving device is in transmission connection with the first lifting plate and used for driving the first lifting plate to slide along the guide assembly in the vertical direction, and the gap at the bottom of the real battery pack after loading is simulated by adjusting the distance between the simulated battery pack and the ground;
and the second driving device is in transmission connection with the second lifting plate and is used for driving the second lifting plate to slide along the guide assembly in the vertical direction, and the gap at the top of the real battery pack is simulated after the vehicle is loaded by adjusting the distance between the second lifting plate and the simulated battery pack.
In one embodiment, the first lifter plate is a vehicle chassis.
In this embodiment, the vehicle chassis is used as the first lifting plate, so that the use environment of the real battery pack can be simulated more accurately.
In one embodiment, the guide assembly includes two parallel slide rails, two ends of the first lifting plate are slidably disposed on the two slide rails, respectively, and two ends of the second lifting plate are slidably disposed on the two slide rails, respectively.
In this embodiment, with the both ends of first lifter plate slide respectively set up in two slide rails can improve first lifter plate with the gliding stability of second lifter plate.
In one embodiment, the simulation battery pack comprises a box body, the box body surrounds and forms a containing space, the containing space comprises a plurality of module positions, at least one module position is used for placing a real battery module, and the other module positions are used for placing a battery module model.
In this embodiment, the real battery module and the battery module model may be arranged and combined as needed.
In one embodiment, the battery module model is further included, and the mass, shape, size, and specific heat capacity of the battery module model are the same as those of the real battery module.
In this embodiment, the battery module model replaces the real battery module to carry out test experimental data, which is more close to reality, reduces unnecessary interference, and has higher accuracy.
In one embodiment, the analog battery further includes a plurality of dividing beams disposed in the box at intervals for dividing the accommodating space into a plurality of module positions.
In one embodiment, the battery module model includes:
a plurality of analog battery cells;
the module fastener is used for packaging the experimental battery monomers; and
the mounting piece is arranged on the module fastening piece, and the module fastening piece is fixed on the partition beam through the mounting piece.
In one embodiment, the box body is provided with a collecting hole for collecting the environmental parameters of the accommodating space.
In this embodiment, the leads of the sensor may extend through the collection aperture. The sensor can be a temperature sensor, a smoke sensor, a gas sensor, a pressure sensor, a gas concentration sensor, a deformation stress sensor, a camera, a voice collector, etc.
In one embodiment, the box body is provided with a light supplementing hole for improving the brightness in the accommodating cavity.
In this embodiment, the lighting hole may be aligned to the real battery module or a position where the battery module is easily deformed after thermal runaway. The camera can also be right opposite to the real battery module or a position where the battery module is easy to deform after thermal runaway. The light intensity in the box body can be improved through the lighting hole.
The battery thermal runaway experimental apparatus that this application embodiment provided includes the direction subassembly first lifter plate the second lifter plate with the simulation battery package. The first lifting plate and the second lifting plate are arranged on the guide assembly in a sliding mode. The simulation battery pack is arranged between the first lifting plate and the second lifting plate. The simulation battery pack is fixedly arranged relative to the second lifting plate. When the first lifting plate moves up and down along the vertical direction, the simulation battery pack can be driven to move in the vertical direction, and therefore the distance between the first lifting plate and the ground can be adjusted. The second lifting plate is arranged on one side, far away from the ground, of the first lifting plate, so that the distance between the second lifting plate and the simulation battery pack can be adjusted by adjusting the distance between the second lifting plate and the first lifting plate.
It will be appreciated that the distance of the first lifter plate relative to the ground may be adjusted first so that the distance of the simulated battery pack relative to the ground is the same as the distance to the ground when the real battery is packaged in the vehicle. The distance of the second lifter plate relative to the top of the simulated battery pack is then adjusted so that the distance of the second lifter plate relative to the top of the simulated battery pack is equal to the distance of the top of the real battery pack from the nearest structure in the vehicle when the real battery pack is packaged in the vehicle. Therefore, the positions of the simulated battery pack relative to the ground and the second lifting plate are adjusted through the battery thermal runaway experiment device, so that the surrounding spaces of the top and the bottom of the simulated battery pack are the same as the surrounding space of the real battery after being loaded. The battery thermal runaway experimental device can be used for simulating the working condition environment of a real battery, and the situation that the experimental effect is influenced by the fact that the surrounding space of the simulated battery pack is different from the surrounding space behind the real battery pack vehicle, and therefore the difference of thermal convection, radiation and thermal conduction paths and speed is caused is avoided. Therefore, the accuracy of the simulation experiment can be greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a side view of a thermal runaway experimental apparatus for a battery according to an embodiment of the present application;
FIG. 2 is a top view of the interior of a simulated battery pack provided in accordance with an embodiment of the present application;
FIG. 3 is a cross-sectional view at A-A of a simulated battery pack provided in accordance with an embodiment of the present application;
FIG. 4 is a top view of the interior of the enclosure provided by one embodiment of the present application;
FIG. 5 is a side view of a housing provided in accordance with an embodiment of the present application;
fig. 6 is a schematic diagram of a battery module model according to an embodiment of the present disclosure.
Description of reference numerals:
the battery thermal runaway testing device 10, the guide assembly 100, the first lifting plate 110, the second lifting plate 120, the slide rail 130, the simulated battery pack 200, the box body 210, the cover body 212, the box body 214, the fastening screws 216, the module positions 220, the partition beams 240, the real battery module 250, the battery module model 260, the simulated battery cells 262, the mounting members 264, the module fastening members 265, the collection holes 266, the light supplement holes 268, the first driving device 310, the second driving device 320 and the ground 400.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1, an example of the present application provides a thermal runaway testing apparatus 10 for a battery. The battery thermal runaway experimental apparatus 10 may include a guide assembly 100, a first lifting plate 110, a second lifting plate 120, and a dummy battery pack 200. The first lifting plate 110 and the second lifting plate 120 are slidably disposed on the guide assembly 100. The dummy battery pack 200 is disposed between the first elevating plate 110 and the second elevating plate 120. The dummy battery pack 200 is fixedly disposed with respect to the second elevating plate 120.
The guide assembly 100 may have a guiding function. The first lifting plate 110 and the second lifting plate 120 may move up and down in a vertical direction with respect to the guide assembly 100. The guide assembly 100 may include one slide rail 130 disposed in a vertical direction, or may include a plurality of slide rails 130 disposed in parallel in a vertical direction. The first lifting plate 110 and the second lifting plate 120 may be disposed on the same slide rail 130, or may be disposed on different slide rails 130.
The first lifting plate 110 and the second lifting plate 120 may be spaced apart in a vertical direction. The first lifting plate 110 and the second lifting plate 120 may be made of metal, wood, or polyester. The first lifting plate 110 and the second lifting plate 120 may have hollow structures, so as to reduce the mass of the first lifting plate 110 and the second lifting plate 120. The first lifting plate 110 and the second lifting plate 120 may be free from each other and may be freely slid along the guide assembly 100. The distance between the first lifting plate 110 and the second lifting plate 120 can be adjusted as desired. Further, the guide assembly 100 may be vertically disposed on the ground 400. By adjusting the distance of the first lifting plate 110 relative to the ground 400, the distance of the simulated battery pack 200 relative to the ground 400 can be adjusted.
The simulated battery pack 200 may be a model of a real battery pack. It is understood that the simulated battery pack 200 may have the same mass, shape, size, and specific heat capacity as the real battery pack. Therefore, by performing the thermal runaway and runaway suppression experiment on the simulated battery pack 200, the thermal runaway and runaway suppression state of the real battery pack under the same environment can be reflected.
In the embodiment of the present application, the battery thermal runaway experimental apparatus 10 includes the guide assembly 100, the first lifting plate 110, the second lifting plate 120, and the simulated battery pack 200. The first lifting plate 110 and the second lifting plate 120 are slidably disposed on the guide assembly 100. The dummy battery pack 200 is disposed between the first elevating plate 110 and the second elevating plate 120. The dummy battery pack 200 is fixedly disposed with respect to the second elevating plate 120. When the first lifting plate 110 moves up and down along the vertical direction, the simulated battery pack 200 can be driven to move in the vertical direction, so that the distance between the first lifting plate 110 and the ground 400 can be adjusted. The second lifting plate 120 is disposed on a side of the first lifting plate 110 far from the ground 400, so that the distance between the second lifting plate 120 and the dummy battery pack 200 can be adjusted by adjusting the distance between the second lifting plate 120 and the first lifting plate 110.
It is understood that the distance of the first lifting plate 110 with respect to the ground 400 may be adjusted first, so that the distance of the simulated battery pack 200 with respect to the ground 400 is equal to the distance from the ground 400 when the real battery is packed in the vehicle. The distance of the second lifting plate 120 relative to the top of the simulated battery pack 200 is then adjusted so that the distance of the second lifting plate 120 relative to the top of the simulated battery pack 200 is the same as the distance of the top of the real battery pack from the nearest structure in the vehicle when the real battery is packaged in the vehicle. Therefore, the positions of the simulated battery pack 200 relative to the ground 400 and the second lifting plate 120 are adjusted by the battery thermal runaway experimental apparatus 10, so that the peripheral spaces of the top and the bottom of the simulated battery pack 200 are the same as the peripheral space of the real battery after loading. The battery thermal runaway experimental device 10 can be compared with the working condition environment of the real battery, and the experimental effect is prevented from being influenced by the difference of thermal convection, radiation and thermal conduction paths and speeds due to the difference of the surrounding space of the simulated battery pack 200 and the surrounding space behind the real battery pack vehicle. Therefore, the accuracy of the simulation experiment can be greatly improved.
Referring to fig. 2 and fig. 3, in an embodiment, a battery module model 260 may be disposed in the simulation battery pack 200, and a real battery module 250 may also be disposed therein. The number of the battery module models 260 and the number of the real battery modules 250 in the simulation battery pack 200 may be set as needed. It is understood that the simulated battery pack 200 may be placed in a test environment of high temperature, high pressure, etc. to simulate the state of the real battery pack in the same environment. The simulated battery pack 200 is placed in the test environment to facilitate extraction of experimental data for the simulated battery pack 200. The experimental data of the simulated battery pack 200 can reflect the state of the real battery pack in the same test environment.
When the simulation battery pack 200 is thermally out of control, the simulation battery pack 200 needs to be subjected to fire and explosion prevention treatment, such as spraying of a fire extinguishing agent. By implementing the measures of fire and explosion prevention on the simulated battery pack 200, the effects brought by the measures of fire and explosion prevention adopted by the real battery pack in the thermal runaway state can also be simulated.
On the premise that the mass, shape, size, and specific heat capacity of the dummy battery pack 200 are the same as those of the real battery pack, the cost of manufacturing the dummy battery pack 200 may be lower than that of the real battery pack. The cost of the entire testing process can be reduced.
It is understood that different numbers of the dummy cells 262 and the real cells can be arranged in the dummy battery pack 200 according to the requirement. The characteristics of the simulated battery cell 262, such as mass, shape, size, and specific heat capacity, may be the same as those of the real battery cell, and the cost of the simulated battery cell 262 is lower than that of the real battery cell. The cost of the entire testing process can be reduced.
In one embodiment, a storage space for placing the real battery pack may be provided in the vehicle. The first lifting plate 110 may resemble the bottom of the storage space. The second lifting space may resemble a top of the storage space. The distance from the real battery pack to the top of the storage space is equal to the distance from the simulated battery pack 200 to the surface of the second lifting plate 120 close to the battery pack. The distance from the real battery pack to the ground 400 is equal to the distance from the simulated battery pack 200 to the ground 400.
In one embodiment, the battery thermal runaway experimental apparatus 10 includes a first drive 310 and a second drive 320. The first driving device 310 is in transmission connection with the first lifting plate 110. The first driving device 310 is used for driving the first lifting plate 110 to slide along the guide assembly 100 in the vertical direction, and the gap at the bottom of the real battery pack after loading is simulated by adjusting the distance between the simulated battery pack 200 and the ground 400. The second driving device 320 is in transmission connection with the second lifting plate 120, the second driving device 320 is used for driving the second lifting plate 120 to slide along the guide assembly 100 in the vertical direction, and the gap at the top of the real battery pack after loading is simulated by adjusting the distance between the second lifting plate 120 and the simulated battery pack 200.
The first driving device 310 and the second driving device 320 may be driving motors. The driving motor may be a stepping motor, and thus, the positions of the first lifting plate 110 and the second lifting plate 120 with respect to the guide assembly 100 may be precisely adjusted. The gap at the bottom of the real battery pack may be a gap between the bottom of the real battery pack and the ground 400 after the real battery pack is loaded in the vehicle. It is understood that, when performing the simulation experiment, the width of the gap between the simulated battery pack 200 and the ground 400 may be equal to the width of the gap between the bottom of the real battery pack car and the ground 400. In one embodiment, the first lifting plate 110 and the second lifting plate 120 may be driven by an air cylinder or a hydraulic cylinder.
Further, the gap at the top of the real battery pack may be a gap between the top of the real battery pack and a structure at which the top of the real battery pack is closest to the inside of the vehicle. It is understood that the width of the gap between the dummy battery pack 200 and the surface of the second lifting plate 120 near the dummy battery pack 200 may be equal to the gap between the top of the real battery pack and the vehicle interior structure. Wherein the vehicle interior structure may be a structure in which the top of the real battery pack is located closest to the vehicle interior.
In one embodiment, the lifting stroke of the first lifting plate 110 may be 40 mm to 1000 mm. In one embodiment, the second elevating stage may be formed to be elevated by 1 mm to 200 mm.
In one embodiment, the first lifter plate 110 is a vehicle chassis. It will be appreciated that the actual battery pack may generally be mounted to the vehicle chassis when the vehicle is being packaged. Therefore, the vehicle chassis is used as the first lifting plate 110, so that the use environment of the real battery pack can be simulated more accurately.
In one embodiment, the guide assembly 100 includes two parallel disposed slide rails 130. Two ends of the first lifting plate 110 are respectively slidably disposed on the two sliding rails 130. Two ends of the second lifting plate 120 are respectively slidably disposed on the two slide rails 130. The two slide rails 130 are vertically arranged on the ground 400. The cross section of the slide rail 130 may be circular, rectangular, or an i-shaped structure. Both ends of the first lifting plate 110 and both ends of the second lifting plate 120 may have sleeves matching the cross-section of the slide rails 130. The sleeve is sleeved on the two slide rails 130, so that the first lifting plate 110 and the second lifting plate 120 can be driven to slide along a vertical direction.
Referring to fig. 4 and 5, in one embodiment, the analog battery pack 200 includes a case 210. The case 210 encloses to form a receiving space. The receiving space includes a plurality of module bits 220. At least one of the module positions 220 is used for placing a real battery module 250. The other module positions 220 are used for placing the battery module model 260. The case 210 may serve as a housing of the analog battery pack 200. The case 210 may have a cubic structure. Different module positions 220 can be arranged in the box body 210 according to requirements. The module position 220 may place the real battery module 250 and the battery module model 260, respectively. It is understood that the module positions 220 may be separated by a blocking structure, or may be formed by forming a groove in the bottom of the box 210. The module sites 220 are identical in shape and size, and thus the real battery module 250 and the battery module model 260 can be freely placed as needed. The real battery module 250 and the battery module model 260 may be arranged and combined as needed. For example, 1 real battery module 250, 9 battery module models 260, or 2 real battery modules 250, 8 battery module models 260 may be provided.
It is understood that the material, strength, and shape structure of the case 210 may be the same as those of the real battery pack.
In one embodiment, the case 210 may include a case body 214 and a cover 212. The box main body 214 may be provided with an opening, and the cover body 212 may be used to close the opening. It is understood that the opening of the tank body 214 may be provided with a flange structure. The opening may be sealed by the cover 212 being secured to the flange structure by fastening screws 216.
In one embodiment, the battery thermal runaway experimental apparatus 10 further includes the battery module model 260. The mass, shape, size, and specific heat capacity of the battery module model 260 are the same as those of the real battery module 250. Therefore, the data of the test experiment performed by the battery module model 260 instead of the real battery module 250 is more practical, thereby reducing unnecessary interference and having higher accuracy.
In one embodiment, the simulated cell further comprises a plurality of segmented beams 240. The plurality of dividing beams 240 are disposed in the box 210 at intervals, and are used for dividing the accommodating space into a plurality of module positions 220. The division beams 240 may be disposed in parallel in the case 210. The dividing beam 240 may have a sheet-like structure. The dividing beam 240 may be made of fire retardant material, so that it is possible to prevent a fire from occurring in some of the real battery modules 250 when another of the real battery modules 250 is in a fire. Further, two ends of the dividing beam 240 are spaced apart from the bottom and the top of the box 210 by at least one gap. Therefore, when a certain real battery module 250 releases gas in an uncontrolled manner, the gas can be rapidly diffused all around, and explosion caused by narrow space is avoided.
Referring to fig. 6, in one embodiment, the battery module model 260 includes a plurality of dummy cells 262, module fasteners 265, and mounting members 264. The module fastener 265 is used to encapsulate the plurality of experimental battery cells. The mounting member 264 is disposed on the module fastener 265. The module fasteners 265 are secured to the segmented beam 240 by the mounts 264. The mass, shape, size and specific heat capacity of the dummy cell 262 are equal to those of the real cell. The dummy cell 262 may therefore be a substitute for the real cell. The cost of the dummy cell 262 is lower than that of the real cell, so that the test cost can be reduced.
In one embodiment, the module fastener 265 has a mass of M1 and a specific heat capacity of C1. The mass of the mounting member 264 is M2, the specific heat capacity is C2, the mass of the simulation battery cell 262 is M3, the specific heat capacity is C3, and the number is N. The mass of the real battery module 250 is M5, and the specific heat capacity is C5. Thus, it is possible to provide
M1×C1+M2×C2+M3×C3×N＝M5×C5。
In one embodiment, the module fastener 265 may be a packaging sheet. The plurality of the analog battery cells 262 arranged in a stacked manner may be packaged by the packaging sheet. The module fastener 265 may be a cartridge into which a plurality of the analog battery cells 262 may be fixed.
In one embodiment, the mounting member 264 may be disposed on a side of the module fastener 265 remote from the dummy cell 262. The mounting member 264 may be a sheet-like structure. The mounting member 264 may be provided with a mounting hole. The dividing beam 240 may be provided with a through hole. The mounting member 264 may be fixed to the division beam 240 by bolts passing through the mounting holes and the through holes. Thereby securing the module fasteners 265 to the split beam 240.
In one embodiment, the housing 210 is provided with a pick-up hole 266. The collection hole 266 is used for collecting environmental parameters of the accommodating space. It is understood that various sensors may be disposed in the case 210 of the analog battery pack 200. The leads of the sensor may extend through the pick-up aperture 266. The sensor can be a temperature sensor, a smoke sensor, a gas sensor, a pressure sensor, a gas concentration sensor, a deformation stress sensor, a camera, a voice collector, etc. In one embodiment, the collection aperture 266 is disposed in a sidewall of the housing 210. In one embodiment, the collection aperture 266 may also be disposed at the top of the housing 210.
In one embodiment, the housing 210 is provided with a light compensating aperture 268. The light compensating hole 268 is used for increasing the brightness inside the case 210. It is understood that the camera may be disposed inside the housing 210. Images of the real battery module 250 and the battery module model 260 may be collected through the camera. The image may be used as a reference for thermal runaway of the real battery module 250 and the battery module model 260. Because there are few light rays in the box 210, the definition of the image collected by the camera may be deteriorated. The light intensity in the case 210 can be increased through the lighting hole. It can be understood that the lighting hole may be aligned with a position where the real battery module 250 or the battery module model 260 is easily deformed after thermal runaway. The camera may also be aligned to a position where the real battery module 250 or the battery module model 260 is easily deformed after thermal runaway.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A battery thermal runaway experimental device is characterized by comprising:
a guide assembly;
the first lifting plate and the second lifting plate are arranged on the guide assembly in a sliding mode; and
the simulation battery pack is arranged between the first lifting plate and the second lifting plate and is fixedly arranged relative to the second lifting plate.
2. The thermal runaway experimental apparatus for a battery of claim 1, further comprising:
the first driving device is in transmission connection with the first lifting plate and used for driving the first lifting plate to slide along the guide assembly in the vertical direction, and the gap at the bottom of the real battery pack after loading is simulated by adjusting the distance between the simulated battery pack and the ground;
and the second driving device is in transmission connection with the second lifting plate and is used for driving the second lifting plate to slide along the guide assembly in the vertical direction, and the gap at the top of the real battery pack is simulated after the vehicle is loaded by adjusting the distance between the second lifting plate and the simulated battery pack.
3. The battery thermal runaway experimental apparatus of claim 2, wherein the first lifter plate is a vehicle chassis.
4. The thermal runaway experimental device of claim 1, wherein the guide assembly comprises two parallel slide rails, two ends of the first lifting plate are slidably disposed on the two slide rails, and two ends of the second lifting plate are slidably disposed on the two slide rails.
5. The battery thermal runaway experimental apparatus as claimed in claim 1, wherein the simulated battery pack comprises a box body, the box body surrounds and forms a containing space, the containing space comprises a plurality of module positions, at least one module position is used for placing a real battery module, and the other module positions are used for placing a battery module model.
6. The experimental apparatus for thermal runaway of a battery as claimed in claim 5, further comprising the battery module model having the same mass, shape, size and specific heat capacity as those of the real battery module.
7. The thermal runaway experimental apparatus for batteries of claim 5, wherein the simulated battery further comprises a plurality of dividing beams spaced apart in the box for dividing the receiving space into a plurality of module positions.
8. The thermal runaway experimental apparatus for batteries of claim 7, wherein the battery module model comprises:
a plurality of analog battery cells;
the module fastener is used for packaging the experimental battery monomers; and
the mounting piece is arranged on the module fastening piece, and the module fastening piece is fixed on the partition beam through the mounting piece.
9. The thermal runaway experimental apparatus for batteries of claim 5, wherein the box body is provided with a collection hole for collecting environmental parameters of the accommodation space.
10. The thermal runaway experimental apparatus for batteries of claim 5, wherein the box body is provided with a light compensating hole for improving the brightness in the accommodating cavity.
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| WO2024040596A1 (en) * | 2022-08-26 | 2024-02-29 | 宁德时代新能源科技股份有限公司 | Equivalent test method and test fixture for battery cell |
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