CN114069124A - Battery box, battery pack and power supply device - Google Patents
Battery box, battery pack and power supply device Download PDFInfo
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- CN114069124A CN114069124A CN202010747998.7A CN202010747998A CN114069124A CN 114069124 A CN114069124 A CN 114069124A CN 202010747998 A CN202010747998 A CN 202010747998A CN 114069124 A CN114069124 A CN 114069124A
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- battery
- exhaust
- space
- assembly
- flue gas
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000003546 flue gas Substances 0.000 claims abstract description 65
- 238000002347 injection Methods 0.000 claims abstract description 48
- 239000007924 injection Substances 0.000 claims abstract description 48
- 239000003112 inhibitor Substances 0.000 claims abstract description 28
- 230000000694 effects Effects 0.000 claims abstract description 20
- 230000002829 reductive effect Effects 0.000 claims abstract description 19
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 238000003860 storage Methods 0.000 claims description 32
- 239000000779 smoke Substances 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000013022 venting Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 239000007921 spray Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000036961 partial effect Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- WVSNNWIIMPNRDB-UHFFFAOYSA-N 1,1,1,3,3,4,4,5,5,6,6,6-dodecafluorohexan-2-one Chemical compound FC(F)(F)C(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F WVSNNWIIMPNRDB-UHFFFAOYSA-N 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- UKACHOXRXFQJFN-UHFFFAOYSA-N heptafluoropropane Chemical compound FC(F)C(F)(F)C(F)(F)F UKACHOXRXFQJFN-UHFFFAOYSA-N 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
-
- 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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- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a battery box, a battery pack and a power supply device. The box body comprises a wall structure, and an accommodating space and an exhaust space which are communicated are formed in the wall structure; the wall structure is provided with an exhaust hole for communicating the exhaust space with the external environment; the accommodating space is used for accommodating a battery; the injection assembly is arranged on the box body and used for injecting an inhibitor to the high-temperature flue gas released by the battery flowing through the exhaust space so as to reduce the temperature and activity of the high-temperature flue gas; and the exhaust valve is arranged in the exhaust hole and used for discharging the high-temperature flue gas with reduced temperature and activity to the external environment. According to the invention, the inhibitor is sprayed to the high-temperature flue gas passing through the exhaust space through the spraying assembly to reduce the temperature and activity of the high-temperature flue gas, and then the treated high-temperature flue gas is discharged into the external environment, so that the high-temperature flue gas is prevented from being directly discharged into the external environment, the high-temperature flue gas is prevented from being directly contacted with air, the high-temperature flue gas is prevented from being ignited and burnt, and the safety of the battery assembly in the use process is improved.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a battery box, a battery assembly and a power supply device.
Background
The battery energy storage has been applied to the fields of new energy smoothing, demand response, power support, peak clipping and valley filling of the power system due to the characteristics of easy site selection, flexible configuration and the like. In battery pack, can release high temperature flue gas after battery monomer or battery module thermal runaway, because high temperature flue gas has great pressure and higher temperature, consequently, the high temperature flue gas directly emits into external environment through the discharge valve on the battery box among the exhaust process. However, because the temperature and activity of the high-temperature flue gas are high, when the high-temperature flue gas is directly discharged into the external environment and is mixed with air in the external environment, ignition and combustion are often caused, the input of a fire extinguishing agent can be influenced in the combustion process, and finally, the fire is spread to an adjacent battery box, so that a fire accident is caused. Therefore, the safety of the battery pack is low in a thermal runaway state of the battery cells or the battery module.
Disclosure of Invention
In view of the above, it is necessary to provide a battery box, a battery pack, and a power supply device that can improve safety.
A battery case, comprising:
the refrigerator comprises a box body and a cover, wherein the box body comprises a wall structure, and an accommodating space and an exhaust space which are communicated are formed in the wall structure; the wall structure is provided with an exhaust hole for communicating the exhaust space with the external environment; the accommodating space is used for accommodating a battery;
the injection assembly is arranged on the box body and used for injecting an inhibitor to the high-temperature smoke released by the battery flowing through the exhaust space so as to reduce the temperature and activity of the high-temperature smoke;
and the exhaust valve is arranged in the exhaust hole and used for discharging the high-temperature flue gas with reduced temperature and activity to the external environment.
Preferably, in one of the embodiments, the exhaust space is provided in the wall structure.
Preferably, in one embodiment, the battery box further includes:
the heat insulation layer is arranged between the accommodating space and the exhaust space; the heat insulation layer is provided with a vent hole, and two ends of the vent hole are communicated with the accommodating space and the exhaust space;
and the exhaust pipeline is arranged between the battery and the heat insulation layer, one end of the exhaust pipeline is opposite to the battery, and the other end of the exhaust pipeline is opposite to the vent hole.
Preferably, in one embodiment, the battery box further includes a trigger plug, the trigger plug is disposed in the vent hole, and the trigger plug can trigger a state change of the trigger plug based on a received external signal to adjust a communication state between the accommodating space and the exhaust space.
Preferably, in one embodiment, at least one injection assembly is provided at the air outlet of each exhaust duct.
Preferably, in one embodiment, the injection assembly is provided at an air inlet of the exhaust valve.
Preferably, in one embodiment, the injection assembly and the exhaust valve are integrally formed.
Preferably, in one embodiment, the battery box further comprises a storage assembly, the storage assembly is communicated with the injection assembly, and the inhibitor is stored in the storage assembly.
Preferably, in one of the embodiments, the storage assembly is provided in the wall structure.
A battery pack comprises the battery box and a battery, wherein the battery is arranged in the accommodating space of the battery box.
A power supply device comprises a control unit, a sensing unit and any one of the battery components; the sensing unit is arranged in the exhaust space, and the control unit is electrically connected with the sensing unit and the battery assembly respectively and used for controlling and driving the injection assembly in the battery assembly according to information fed back by the sensing unit.
Above-mentioned battery box sprays inhibitor to the high temperature flue gas through exhaust space through injection subassembly to reduce the temperature and the activity of high temperature flue gas, then arrange the high temperature flue gas after will handling into external environment through discharge valve. Above-mentioned battery box avoids high temperature flue gas direct discharge to go into external environment, prevents high temperature flue gas and air direct contact, avoids high temperature flue gas to fire burning, improves the security in the battery pack use. Above-mentioned battery box has improved the atmospheric pressure of the inhibitor of spouting through the injection subassembly, has refined the particle size of inhibitor, and then realizes the intensive mixing of inhibitor and high temperature flue gas, has improved the inhibitory effect of inhibitor to high temperature flue gas.
Above-mentioned battery pack locates the storage module in the wall structure, has reduced the size of battery box, has reduced the volume that occupies of battery box, reduces the processing degree of difficulty and the manufacturing cost of battery box.
Above-mentioned power supply unit has realized the automatic control to spraying the subassembly through setting up the control unit, has improved degree of automation. Meanwhile, the sensing unit is arranged, so that accurate control of the spraying assembly according to high-temperature smoke is realized, the service life of the power supply device is prolonged, and the safety of the power supply device in operation is guaranteed.
Various specific structures of the present application, as well as the functions and effects thereof, will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a power supply apparatus including a cross-sectional view of a battery assembly according to one embodiment of the present application;
FIG. 2 is an enlarged view of a portion of area A in one embodiment of FIG. 1;
FIG. 3 is an enlarged partial view of area A in a cross-sectional view of a battery case according to another embodiment of the present application, in which a spray assembly and a vent valve are integrally formed;
FIG. 4 is an enlarged partial view of area A of a cross-sectional view of a battery compartment according to another embodiment of the present application, wherein the exhaust plenum and storage assembly is provided in the wall structure and the injection assembly is provided at the inlet of the exhaust valve;
FIG. 5 is an enlarged view of a portion of area A of a cross-sectional view of a battery case according to another embodiment of the present application, wherein the exhaust space and the storage assembly are formed in a wall structure, and the injection assembly and the exhaust valve are integrally formed;
FIG. 6 is an enlarged partial view of area A of a cross-sectional view of a battery compartment according to another embodiment of the present application, wherein a spray assembly is provided at the outlet of the vent conduit;
fig. 7 is an enlarged partial view of a region a in a cross-sectional view of a battery case according to another embodiment of the present application, in which an exhaust space is provided in a wall structure and a spray assembly is provided at an air outlet of a vent duct;
FIG. 8 is an enlarged partial view of area A of a cross-sectional view of a battery compartment according to another embodiment of the present application, wherein the exhaust plenum and storage assembly is disposed in the wall structure and the injection assembly is disposed at the outlet of the vent conduit;
fig. 9 is a partially enlarged view of a region B in a cross-sectional view of a battery case according to another embodiment of the present application;
fig. 10 is a partially enlarged view of a region C in a cross-sectional view of a battery case according to another embodiment of the present application.
Wherein, in the reference numeral, 10-battery box; 100-a box body; 110-wall structure; 120-vent hole; 200-an exhaust valve; 300-a spray assembly; 400-a thermal insulation layer; 410-a vent hole; 500-trigger plug; 600-an exhaust duct; 700-a containing space; 800-an exhaust space; 900-a storage component; 20-a battery; 30-a control unit; 40-a control valve; 50-a temperature sensor; 60-a first pressure sensor; 70-second pressure sensor.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "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 invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
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 invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, 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 an intermediate. 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.
In one embodiment, as shown in fig. 1 and 10, the battery box 10 of the present application includes a box body 100, an exhaust valve 200 and a spraying assembly 300, wherein the exhaust valve 200 and the spraying assembly 300 are disposed on the box body 100. Specifically, the box 100 includes a wall structure 110, and an accommodating space 700 and an exhaust space 800 are formed in the wall structure 110 and are communicated with each other. In addition, the wall structure 110 is formed with a vent hole 120, and the vent hole 120 is used for communicating the vent space 800 with the external environment (not labeled). The accommodating space 700 is used for accommodating the battery 20, the injection assembly 300 is used for injecting an inhibitor to high-temperature flue gas released by the battery 20 flowing through the exhaust space 800, the inhibitor is atomized and evaporated to absorb the high-temperature flue gas released by the thermal runaway battery, and meanwhile, the formed gas inerts the high-temperature flue gas, so that the temperature and activity of the high-temperature flue gas are reduced. The exhaust valve 200 is disposed in the exhaust hole 120 for exhausting the high temperature flue gas with reduced temperature and activity to the external environment. It is understood that the battery 20 may be a single battery or a battery module composed of a plurality of single batteries; the high-temperature flue gas passing through the exhaust space 800 may be high-temperature flue gas located in the exhaust space 800, high-temperature flue gas located in the exhaust hole 120, or high-temperature flue gas located outside the exhaust hole 120. The battery case 10 may have any shape, and the wall structure 110 may have a housing structure matching any shape.
In order to improve the safety of the battery assembly during use, in one preferred embodiment, as shown in fig. 1, the battery box 10 is rectangular, that is, the housing structure is a rectangular structure, and specifically, the wall structure 110 includes an upper wall (not shown), a lower wall (not shown), and side walls (not shown).
In order to further improve the safety of the battery pack during use, in one preferred embodiment, a buffering space (not shown) for buffering external loads is provided in the wall structure 110. Specifically, the buffer space is a hollow structure arranged in the thickness direction of the shell structure and is located in the wall surface of the shell structure.
Furthermore, based on the usage environment of the battery pack, the external load applied to the battery pack is mainly horizontal, and in one preferred embodiment, the side wall is provided with a buffer space.
In one preferred embodiment, the inhibitor may be a perfluorohexanone liquid, a gas-liquid two-phase inhibitor obtained by compounding perfluorohexanone with at least one of nitrogen, carbon dioxide, ammonia gas, and the like, or a compound of at least two of perfluorohexanone, heptafluoropropane, nitrogen, carbon dioxide, ammonia gas, and the like. It is to be understood that the suppressant herein includes any known fire suppressant that evaporates, vaporizes, inerts and chemically retards fire after being injected into the exhaust space, and the specific material composition and proportions are not limiting herein.
In one preferred embodiment, the exhaust valve 200 may be a valve body in various forms. Specifically, the exhaust valve 200 may be a one-way air release valve or a pressure diaphragm valve.
In one specific embodiment, the included angle between the injection direction of the injection assembly 300 and the flow direction of the high-temperature flue gas ranges from 0 ° to 180 °.
In order to reduce the thermal shock of the high-temperature flue gas to the exhaust valve and reduce the design requirement and the production cost of the exhaust relief valve, in a preferred embodiment, the included angle between the injection direction of the injection assembly 300 and the flow direction of the high-temperature flue gas is 90 °.
In one preferred embodiment, the front end of the injection assembly 300 is provided with a stirring assembly (not shown) for sufficiently mixing the inhibitor and the high-temperature flue gas, so as to enhance the temperature reduction and inhibition effects of the inhibitor.
Above-mentioned battery box sprays inhibitor to the high temperature flue gas through exhaust space through injection subassembly to reduce the temperature and the activity of high temperature flue gas, then arrange the high temperature flue gas after will handling into external environment through discharge valve. Above-mentioned battery box avoids high temperature flue gas direct discharge to go into external environment, prevents high temperature flue gas and air direct contact, avoids high temperature flue gas to fire burning, improves the security in the battery pack use. Above-mentioned battery box has improved the atmospheric pressure of the inhibitor of spouting through the injection subassembly, has refined the particle size of inhibitor, and then realizes the intensive mixing of inhibitor and high temperature flue gas, has improved the inhibitory effect of inhibitor to high temperature flue gas.
In one embodiment, as shown in fig. 4, 5, 7 and 8, the exhaust space 800 of the battery box 10 is provided in the wall structure 110. The exhaust space 800 is provided in the battery box 10, and does not occupy an additional space, reducing the size of the battery box 10 and reducing the occupied space of the battery box 10.
In order to further optimize the structure of the battery case 10 and reduce the difficulty of molding the battery case 10, in one preferred embodiment, the air exhaust space 800 is a buffer space in the wall structure 110. The battery box does not need to be additionally provided with the exhaust space 800, so that the space utilization rate of the battery box is improved on one hand, and the forming difficulty of the battery box is reduced on the other hand.
In one of the preferred embodiments, the exhaust space 800 is a buffer space in the wall structure 110. For example, the exhaust space 800 is a buffer space in the sidewall.
In another preferred embodiment, the exhaust space 800 is a buffer space in the wall structure 110. For example, the exhaust space 800 is a buffer space in the upper wall or the lower wall.
Above-mentioned battery box through locating exhaust space in the wall structure, has reduced the size of battery box, has reduced the occupation space of battery box, has simplified the inside structure of battery box, has reduced the processing degree of difficulty of battery box, practices thrift the manufacturing cost of battery box, has improved economic benefits.
In one embodiment, as shown in fig. 1 to 9, the battery box 10 further includes a heat insulating layer 400 and an exhaust duct 600. The heat insulation layer 400 is disposed between the accommodating space 700 and the exhaust space 800, and is used for isolating heat transfer between the accommodating space 700 and the exhaust space 800. The heat insulating layer 400 is provided with a vent hole 410, two ends of the vent hole 410 are communicated with the accommodating space 700 and the exhaust space 800, and the exhaust duct 600 is arranged between the battery 20 and the heat insulating layer 400. The exhaust duct 600 has one end disposed opposite to the battery 20 and the other end disposed opposite to the vent 410.
In one particular embodiment, the vent conduit 600 interfaces with the battery 20 on one end and the vent 410 on the other end. The exhaust duct 600 and the thermal insulating layer 400 with the vent 410 form a closed channel communicating the battery 20 and the exhaust space 800. Specifically, a certain battery 20 in the accommodating space 700 releases high-temperature flue gas, and the high-temperature flue gas passes through the exhaust duct 600 and the vent 410 and is discharged into the exhaust space 800.
In order to reduce the difficulty of installing the exhaust duct 600, in one specific embodiment, the other end of the exhaust duct 600 covers the end of the vent 410, so that the high-temperature smoke discharged from the battery 20 flows into the exhaust space 800 through the exhaust duct 600 and the vent 410.
In order to improve the sealing performance between the exhaust duct 600 and the thermal insulation layer 400, in another specific embodiment, the exhaust duct 600 is sleeved in the vent 410, so that the high-temperature smoke discharged from the battery 20 flows into the exhaust space 800 through the exhaust duct 600 and the vent 410.
In the above-mentioned battery box, separate accommodation space and exhaust space through setting up the insulating layer, avoid carrying out heat exchange between accommodation space and the exhaust space, discharge the high temperature flue gas of battery release to the exhaust space through exhaust duct simultaneously in, prevent that the high temperature flue gas from to adjacent battery diffusion, influence the use of adjacent battery. Therefore, when a certain battery is in thermal runaway, the battery box realizes the isolation of high-temperature smoke released by the battery from adjacent batteries, reduces the influence range of the thermal runaway of the battery, and further improves the safety of the battery assembly in the use process.
In order to further improve the heat insulation effect of the heat insulation layer, and further prevent high-temperature smoke from flowing to the adjacent battery 20 along the vent hole 410, in one embodiment, as shown in fig. 1 to 8, the battery box 10 further includes a trigger plug 500. Wherein the trigger plug 500 is disposed within the vent 410. The trigger plug 500 can trigger its own state change based on the received external signal to adjust the communication state between the accommodating space 700 and the exhaust space 800.
In one embodiment, the trigger plug 500 is a heat sensitive trigger plug, and when the temperature and activity around the heat sensitive trigger plug reach preset values, the heat sensitive trigger plug starts to melt, so that the vent hole 410 communicates the accommodating space 700 and the exhaust space 800. Meanwhile, because the space in the exhaust space 800 is large, the temperature and the activity of the high-temperature smoke can be automatically reduced after the high-temperature smoke enters the exhaust space 800, and the corresponding thermosensitive trigger plugs of other batteries are also ensured to be in an unfired state.
In one particular embodiment, the trigger plug 500 is a pressure trigger plug.
Above-mentioned battery box through set up in the air vent and trigger the formula intercommunication that triggers between stopper realization accommodation space and the exhaust space, has improved the degree of automation of battery box regulation and control when thermal runaway in the battery box, simultaneously, avoids the high temperature flue gas flow in the exhaust space to neighbouring battery, reduces the influence range of thermal runaway battery.
In order to further improve the suppression and temperature reduction effect of the suppressant on the high-temperature flue gas, in one embodiment, as shown in fig. 6 to 8, at least one injection assembly 300 is disposed at the air outlet of each exhaust duct 600.
Through the arrangement mode, the high-temperature flue gas is cooled and inhibited in the first time, and the inhibiting effect is improved. Meanwhile, the injection assembly 300 can also effectively prevent the high-temperature flue gas entering the exhaust space 800 from contacting other trigger plugs 500 and triggering other trigger plugs 500, and therefore, the injection assembly 300 can also prolong the service life of the trigger plugs 500.
Above-mentioned battery box sets up at least one injection subassembly in every exhaust duct's gas outlet department, can contact with high temperature flue gas fast, and then reduces the temperature and the activity of high temperature flue gas fast. Meanwhile, the inhibitor in the battery box can directly reach a battery out of thermal control, the influence of high-temperature smoke on the internal structure of the battery box and the battery is reduced, the safety performance of the battery assembly in the using process is improved, and the service life of the battery assembly is prolonged.
As shown in fig. 1, 2 and 4, in one embodiment, the injection assembly 300 is located at the inlet of the exhaust valve 200, i.e., the injection assembly 300 is disposed on the wall structure 110 near the exhaust vent 120.
In order to improve the suppression effect of the suppressor agent, in one preferred embodiment, the number of injection assemblies 300 is plural and uniformly distributed around the intake port of the exhaust valve 200.
Above-mentioned battery box through locating discharge valve's air inlet department with injection assembly, can realize the processing to the high temperature flue gas that all batteries that this discharge valve corresponds released through one injection assembly, has reduced battery box's manufacturing cost.
In one embodiment, at least one of a relief valve and a safety valve is further disposed on the battery box, and the injection assembly 300 is disposed at an air inlet of the relief valve and an air inlet of the safety valve.
In order to further simplify the structure of the battery box 10 and reduce the difficulty in installing the battery box 10, in one embodiment, as shown in fig. 3 and 5, the injection assembly 300 and the exhaust valve 200 are integrally formed, that is, the injection assembly 300 is also disposed in the exhaust hole 120, and during the process that the high-temperature flue gas passes through the exhaust valve 200, the inhibitor injected by the injection assembly 300 interacts to reduce the temperature and activity of the high-temperature flue gas.
Above-mentioned battery box sets up to integration formed part through spraying subassembly and discharge valve, has optimized the structure of battery box, has reduced the occupation space of battery box, has reduced the assembly degree of difficulty of battery box.
In order to further simplify the structure of the battery box 10 and reduce the difficulty in mounting the battery box 10, in one embodiment, the injection assembly 300 is integrally formed with the box 100.
In one embodiment, as shown in fig. 2, the battery box 10 further includes a storage assembly 900. Wherein the storage assembly 900 is in communication with the injection assembly 300 via a conduit (not shown), and the storage assembly 900 stores therein the suppressant.
To facilitate flexible movement of the battery compartment, in one embodiment, the storage assembly 900 is disposed inside the battery compartment 10.
To facilitate the addition of inhibitors to the storage assembly 900, in another embodiment, the storage assembly 900 is provided outside of the battery case 10.
Above-mentioned battery box through setting up storage assembly, has realized the timely replenishment of inhibitor, has improved injection assembly's work efficiency, and it is long when having prolonged injection assembly's use, has improved the result of use.
To optimize the structure of the battery box, in one embodiment, as shown in fig. 4, 5 and 8, a storage assembly 900 is provided in the wall structure 110.
In order to further optimize the structure of the battery box and to increase the space utilization of the battery box, in one of the preferred embodiments, the storage assembly 900 is a buffer space in the wall structure 110.
Further, in one embodiment, both the storage assembly 900 and the exhaust cavity 800 are disposed in the wall structure 110. Wherein the wall structure 110 includes an upper wall (not shown), a lower wall (not shown), and a side wall (not shown).
In one preferred embodiment, both storage assembly 900 and vent cavity 800 are disposed in a side wall of wall structure 110, depending on the environment in which the battery assembly is used.
To facilitate installation of the spray assembly and to shorten the length of the conduit between the spray assembly and the storage assembly, in one preferred embodiment, the storage assembly 900 is disposed within the same wall surface of the wall structure 110 as the exhaust cavity 800. For example, storage assemblies 900 and exhaust cavities 800 may be staggered along the inner surface of wall structure 110, and storage assemblies 900 and exhaust cavities 800 may be juxtaposed along the inner surface of wall structure 110 from the inside out. It is to be understood that the specific location of the storage assembly 900 and the vent cavity 800 within the wall structure 110 is not a particular limitation of the present application.
In order to achieve a rational utilization of the inner wall structure 110 of the battery compartment 10, in another preferred embodiment the storage assembly 900 and the venting cavity 800 are provided in two different wall surfaces of the wall structure 110.
In the battery box, the storage assembly is arranged in the wall structure, so that the size of the battery box is reduced, the occupied volume of the battery box is reduced, and the processing difficulty and the production cost of the battery box are reduced.
In one embodiment, as shown in fig. 1, a battery assembly includes a battery 20 and a battery box 10 of any one of the above embodiments, wherein the battery 20 is disposed in a receiving space 700 of the battery box 10.
In one embodiment, the number of the batteries 20 is plural.
Above-mentioned battery pack utilizes the injection subassembly in the battery box to restrain the high temperature flue gas of release under the battery thermal runaway state in the exhaust space, prevents the direct contact of high temperature flue gas and air, avoids taking place the incident, has improved the security in the battery pack use. The battery pack is compact in structure and high in safety.
In one embodiment, as shown in fig. 1, a power supply device includes a control unit 30, a sensing unit (not shown), and any one of the above battery assemblies, wherein the control unit 30 is electrically connected to the sensing unit and the battery assembly respectively. Wherein, the sensing unit is disposed in the exhaust space 800, and the control unit 30 is used for controlling and driving the injection assembly 300 in the battery assembly according to the information fed back by the sensing unit. Specifically, the sensing unit includes a temperature sensor 50 and a first pressure sensor 60 disposed in the exhaust space 800. Wherein the temperature sensor 50 is used to measure the temperature of the gas in the exhaust space 800 and the first pressure sensor 60 is used to measure the internal pressure in the exhaust space 800.
Above-mentioned power supply unit has realized the automatic control to spraying the subassembly through setting up the control unit, has improved degree of automation. Meanwhile, the sensing unit is arranged, so that accurate control of the spraying assembly according to high-temperature smoke is realized, the service life of the power supply device is prolonged, and the safety of the power supply device in operation is guaranteed.
In one preferred embodiment, a control valve 40 is provided between the jetting assembly 300 and the storage assembly 900. The control unit 30 controls the operating state of the jetting assembly 300 by controlling the control valve 40. The control unit obtains the concentration of the high-temperature flue gas in the exhaust space 800 according to the gas temperature and the internal pressure fed back by the sensing unit, and sends a working instruction to the control valve 40 according to the concentration of the high-temperature flue gas. Specifically, when the concentration of the high-temperature flue gas in the exhaust space 800 reaches a preset value, the control unit 30 sends an opening operation instruction to the control valve 40, and then the control valve 40 receives the opening instruction and then communicates the storage assembly 900 with the injection assembly 300, and starts the injection assembly 300.
In one preferred embodiment, the power supply further comprises a second pressure sensor 70. Wherein the second pressure sensor 70 is used to measure the external pressure of the external environment and feed back the external pressure to the control unit 30. The control unit 30 obtains the concentration of the high-temperature flue gas according to the gas temperature and the internal pressure, further obtains the required inhibitor injection amount according to the concentration of the high-temperature flue gas and the external pressure, and further determines the working state of the working valve according to the inhibitor injection amount.
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 invention, 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 inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A battery box, comprising:
the refrigerator comprises a box body and a cover, wherein the box body comprises a wall structure, and an accommodating space and an exhaust space which are communicated are formed in the wall structure; the wall structure is provided with an exhaust hole for communicating the exhaust space with the external environment; the accommodating space is used for accommodating a battery;
the injection assembly is arranged on the box body and used for injecting an inhibitor to the high-temperature smoke released by the battery flowing through the exhaust space so as to reduce the temperature and activity of the high-temperature smoke;
and the exhaust valve is arranged in the exhaust hole and used for discharging the high-temperature flue gas with reduced temperature and activity to the external environment.
2. A battery box according to claim 1, characterised in that the venting space is provided in the wall structure.
3. The battery box of claim 1, further comprising:
the heat insulation layer is arranged between the accommodating space and the exhaust space; the heat insulation layer is provided with a vent hole, and two ends of the vent hole are communicated with the accommodating space and the exhaust space;
and the exhaust pipeline is arranged between the battery and the heat insulation layer, one end of the exhaust pipeline is opposite to the battery, and the other end of the exhaust pipeline is opposite to the vent hole.
4. The battery box of claim 3, further comprising a trigger plug disposed in the vent hole, wherein the trigger plug is capable of triggering a state change thereof based on a received external signal to adjust a communication state between the accommodating space and the exhaust space.
5. The battery box according to claim 3 or 4, wherein at least one of the injection assemblies is provided at an air outlet of each of the exhaust ducts.
6. The battery box of claim 1, wherein the injection assembly is provided at an air inlet of the exhaust valve.
7. The battery box of claim 1, wherein the injection assembly and the vent valve are integrally formed.
8. The battery box of claim 1, further comprising a storage assembly in communication with the jetting assembly, the storage assembly having the inhibitor stored therein.
9. The battery box of claim 8, wherein the storage assembly is disposed in the wall structure.
10. A battery pack comprising the battery case according to any one of claims 1 to 9 and a battery, wherein the battery is disposed in the accommodating space of the battery case.
11. A power supply device characterized by comprising a control unit, a sensing unit, and the battery assembly according to claim 10; the sensing unit is arranged in the exhaust space, and the control unit is electrically connected with the sensing unit and the battery assembly respectively and used for controlling and driving the injection assembly in the battery assembly according to information fed back by the sensing unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010747998.7A CN114069124A (en) | 2020-07-30 | 2020-07-30 | Battery box, battery pack and power supply device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010747998.7A CN114069124A (en) | 2020-07-30 | 2020-07-30 | Battery box, battery pack and power supply device |
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| CN114069124A true CN114069124A (en) | 2022-02-18 |
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