CN114284615B - Battery pack box and battery pack - Google Patents
Battery pack box and battery pack Download PDFInfo
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- CN114284615B CN114284615B CN202111681079.5A CN202111681079A CN114284615B CN 114284615 B CN114284615 B CN 114284615B CN 202111681079 A CN202111681079 A CN 202111681079A CN 114284615 B CN114284615 B CN 114284615B
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- cavities
- fire extinguishing
- accommodating
- cavity
- battery pack
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- 230000007246 mechanism Effects 0.000 claims abstract description 34
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- 239000007924 injection Substances 0.000 claims description 62
- 239000002184 metal Substances 0.000 claims description 29
- 238000004806 packaging method and process Methods 0.000 claims description 29
- 239000012943 hotmelt Substances 0.000 claims description 22
- 238000009413 insulation Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000002000 Electrolyte additive Substances 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 7
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- YFMFNYKEUDLDTL-UHFFFAOYSA-N 1,1,1,2,3,3,3-heptafluoropropane Chemical compound FC(F)(F)C(F)C(F)(F)F YFMFNYKEUDLDTL-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
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- 239000003507 refrigerant Substances 0.000 description 2
- NSGXIBWMJZWTPY-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropane Chemical compound FC(F)(F)CC(F)(F)F NSGXIBWMJZWTPY-UHFFFAOYSA-N 0.000 description 1
- 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 1
- UAFOIVDGAVVKTE-UHFFFAOYSA-N 1,1,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-octadecafluoronon-1-ene Chemical compound FC(F)=C(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F UAFOIVDGAVVKTE-UHFFFAOYSA-N 0.000 description 1
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- UKACHOXRXFQJFN-UHFFFAOYSA-N heptafluoropropane Chemical compound FC(F)C(F)(F)C(F)(F)F UKACHOXRXFQJFN-UHFFFAOYSA-N 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
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- 229960004624 perflexane Drugs 0.000 description 1
- ZJIJAJXFLBMLCK-UHFFFAOYSA-N perfluorohexane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F ZJIJAJXFLBMLCK-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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 invention discloses a battery pack box body and a battery pack, and relates to the technical field of batteries. The battery pack box body comprises a box body and a fire extinguishing mechanism; the box body comprises a plurality of cross beams and a plurality of longitudinal beams, the cross beams are arranged at intervals, the longitudinal beams and the cross beams are arranged in a staggered mode to jointly enclose a plurality of mounting bodies for mounting the battery module, and the wall body of at least one of the mounting bodies is provided with a containing cavity; the fire extinguishing mechanism is accommodated in the accommodating cavity and used for overflowing fire extinguishing materials to extinguish fire in a high-temperature environment with the thermal runaway of the battery core of the battery module. On one hand, the fire extinguishing mechanism is directly arranged on the wall body of the installation body, so that the space of the cross beam and the longitudinal beam can be fully utilized, the space additionally occupied is reduced, and the structure is more compact and reliable; on the other hand, the fire extinguishing assembly can directly overflow at the high temperature of the thermal runaway of the battery core to extinguish fire, and compared with an externally-added fire extinguishing tank, the fire extinguishing process is more convenient, reliable and safe.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery pack box and a battery pack.
Background
In order to obtain higher energy/power, a plurality of electric cells are often connected to form a module/battery pack, in the current power battery, if the electric cells are abused or used by mistake, if gas, a large amount of heat or other substances are likely to be generated in the electric cells, explosion is also likely to happen, and in order to obtain high-volume energy, the intervals among the plurality of batteries are smaller, so that the abnormal battery is easy to cause surrounding chain reaction and even cause thermal runaway.
To solve this problem, the industry usually uses a fire extinguishing tank filled with fire extinguishing agent, the fire extinguishing tank is preloaded with a certain pressure and connected into a battery pack by using a pipe, a closing valve is arranged on the pipe, and when a fire occurs, the fire extinguishing agent can be injected into the battery pack by opening the closing valve and utilizing the pressure in the fire extinguishing tank, so as to achieve the aim of extinguishing/cooling and prevent further diffusion of thermal runaway.
However, fire extinguishing is performed by adopting an external fire extinguishing tank, so that the problems of large occupied space and low use convenience and reliability exist.
Disclosure of Invention
The invention aims to provide a battery pack box body and a battery pack, which have small occupied space and high use convenience, reliability and safety.
Embodiments of the invention may be implemented as follows:
in a first aspect, the present invention provides a battery pack case comprising:
the box body comprises a plurality of cross beams and a plurality of longitudinal beams, wherein the cross beams are arranged at intervals, the longitudinal beams and the cross beams are arranged in a staggered mode to jointly enclose a plurality of mounting bodies for mounting the battery module, and the wall body of at least one of the mounting bodies is provided with a containing cavity;
the fire extinguishing mechanism is accommodated in the accommodating cavity and used for overflowing fire extinguishing materials to extinguish fire in a high-temperature environment with the thermal runaway of the battery core of the battery module.
In an alternative embodiment, the installation body is annular, and has four wall bodies that encircle around the circumference of battery module, four wall bodies head and tail connection, and all offered at least one accommodation chamber on at least one wall body in four wall bodies, every accommodation chamber is interior to all hold and to put out a fire mechanism.
In an alternative embodiment, at least one accommodating cavity is formed in each wall, and each electric core of the battery module is opposite to at least one fire extinguishing mechanism.
In an alternative embodiment, the accommodating cavity is a hollow cavity formed in the wall body, and the accommodating cavity is provided with a first opening facing the battery module;
The fire extinguishing mechanism comprises a metal packaging shell and a fire extinguishing material accommodated in the metal packaging shell, wherein the metal packaging shell is provided with an injection hole, a hot-melt plugging piece is arranged at the injection hole, the metal packaging shell is accommodated in the accommodating cavity, and the injection hole and the hot-melt plugging piece are exposed through a first opening;
when the electric core of the battery module is out of control, the hot-melt plugging piece can be melted, so that the fire extinguishing material overflows from the injection hole and flows to the battery module to extinguish fire.
In an alternative embodiment, the accommodating cavity is further provided with a second opening, and the metal packaging shell is accommodated in the accommodating cavity through the second opening;
the holding chamber is provided with the installation step around the circumference of second opening, and the metal packaging shell is provided with and extends the installed part, extends the installed part and is connected with the installation step.
In an alternative embodiment, the accommodating cavity is provided with two mounting steps positioned at the circumference of the second opening, and the two mounting steps are arranged at intervals; two ends of the metal packaging shell are respectively provided with an extension mounting piece, and the two extension mounting pieces are connected with the two mounting steps in one-to-one correspondence.
In an alternative embodiment, the accommodating cavity is provided with a plurality of cavities arranged side by side, the cavities are communicated, and the injection hole is communicated with any one of the cavities.
In an alternative embodiment, the cross beam and the longitudinal beam are hollow structures and are provided with accommodating cavities, and the cross beam and the longitudinal beam enclose a partial accommodating cavity corresponding to the part of each installation body to form the accommodating cavity;
the fire extinguishing mechanism comprises a fire extinguishing material which is contained in the containing cavity, and when the battery core of the battery module is out of control, the fire extinguishing material can overflow from the containing cavity and flow to the battery module to extinguish the fire.
In an alternative embodiment, the cross beam is provided with one or more accommodating cavities, and the accommodating cavities are of a structure with two ends being simultaneously encapsulated, and when the cross beam is provided with a plurality of accommodating cavities, the accommodating cavities are communicated or independently arranged; when the plurality of accommodating cavities are communicated, an injection hole communicated with any one of the plurality of accommodating cavities is formed in the cross beam; when the plurality of accommodating cavities are independently arranged, the cross beam is provided with an injection hole communicated with each accommodating cavity; the hot-melt plugging piece is arranged at the injection hole, and when the battery core of the battery module is in thermal runaway, the hot-melt plugging piece can be melted so that the fire extinguishing material can overflow from the storage cavity and flow into the battery module to extinguish the fire;
and/or the number of the groups of groups,
the longitudinal beam is provided with one or more accommodating cavities, the accommodating cavities are of a structure with two ends being simultaneously encapsulated, and when the longitudinal beam is provided with a plurality of accommodating cavities, the accommodating cavities are communicated or independently arranged; when the plurality of accommodating cavities are communicated, the longitudinal beam is provided with an injection hole communicated with any one of the plurality of accommodating cavities; when the plurality of accommodating cavities are independently arranged, the longitudinal beam is provided with an injection hole communicated with each accommodating cavity; the injection hole is provided with a hot-melt plugging piece, when the battery core of the battery module is out of control, the hot-melt plugging piece can be melted so that fire extinguishing materials can overflow from the storage cavity and flow into the battery module to extinguish the fire.
In an alternative embodiment, all the accommodating cavities of the longitudinal beam and the transverse beam are communicated, and any one of the accommodating cavities is provided with an injection hole;
or,
one part of the accommodating cavities are communicated with each other, the other part of the accommodating cavities are independently arranged, injection holes are formed in any one of the accommodating cavities which are communicated with each other, and injection holes are formed in each of the accommodating cavities which are independently arranged;
or,
all the accommodating cavities of the longitudinal beam and the cross beam are independently arranged, injection holes are formed in each accommodating cavity, and each injection hole is located in the circumferential direction of the corresponding mounting body around the corresponding battery module.
In an alternative embodiment, the cross beam is provided with one or more accommodating cavities, the accommodating cavities are of a structure with two ends being encapsulated successively, and when the cross beam is provided with a plurality of accommodating cavities, the accommodating cavities are communicated or independently arranged; when the plurality of accommodating cavities are communicated, the fire extinguishing material is injected from any one of the accommodating cavities at one end of the rear package; when the plurality of accommodating cavities are independently arranged, fire extinguishing materials are injected from each accommodating cavity at one end of the rear package; when the electric core of the battery module is out of control, the cross beam can be melted to enable the fire extinguishing material to overflow from the storage cavity and flow into the battery module so as to extinguish the fire;
And/or the number of the groups of groups,
the longitudinal beam is provided with one or more accommodating cavities, the accommodating cavities are of a structure with two ends encapsulated in sequence, and when the longitudinal beam is provided with a plurality of accommodating cavities, the accommodating cavities are communicated or independently arranged; when the plurality of accommodating cavities are communicated, the fire extinguishing material is injected from any one of the accommodating cavities at one end of the rear package; when the plurality of accommodating cavities are independently arranged, fire extinguishing materials are injected from each accommodating cavity at one end of the rear package; when the electric core of the battery module is out of control, the longitudinal beam can be melted so that the fire extinguishing material can overflow from the storage cavity and flow into the battery module to extinguish fire.
In an alternative embodiment, both the cross beam and the longitudinal beam are provided with thinned portions which can be melted when the battery cells are out of control, so that the extinguishing material overflows; or the cross beam and the longitudinal beam are made of low-melting-point materials, and can be melted when the electric core is in thermal runaway so as to overflow the fire extinguishing materials.
In an alternative embodiment, the cross beam is provided with a plurality of cavities, each cavity is a containing cavity, and two ends of the plurality of cavities of the cross beam are completely encapsulated; and/or the cross beam is provided with a plurality of cavities, part of the cavities are accommodating cavities, two ends of the cavities of the accommodating cavities are completely encapsulated in the cavities of the cross beam, and the cavities of the non-accommodating cavities in the cavities are not encapsulated;
And/or the number of the groups of groups,
the longitudinal beam is provided with a plurality of cavities, each cavity is a containing cavity, and two ends of the plurality of cavities of the longitudinal beam are completely encapsulated; or the longitudinal beam is provided with a plurality of cavities, part of the plurality of cavities is an accommodating cavity, two ends of the cavities of the accommodating cavity are completely encapsulated in the plurality of cavities of the longitudinal beam, and the cavities of the plurality of cavities which are not accommodated are not encapsulated.
In an alternative embodiment, the fire suppressing material is at least one of a coolant, an electrolyte additive, or a fire suppressing agent.
In an alternative embodiment, a plurality of heat insulation pads are arranged on the wall body of each mounting body, and the heat insulation pads are arranged around the circumference of the battery module and are positioned between the battery module and the corresponding cross beam or longitudinal beam.
In an alternative embodiment, the battery pack box further comprises a plurality of side beams, the side beams are connected end to end in sequence to form an annular mounting cavity, the box body is arranged in the annular mounting cavity, the cross beams are connected with the adjacent side beams, and the longitudinal beams are connected with the adjacent side beams.
In a second aspect, the present invention provides a battery pack comprising:
the battery pack case according to any one of the above embodiments and a plurality of battery modules, wherein the plurality of battery modules are disposed in the plurality of mounting bodies, respectively.
The embodiment of the invention has at least the following advantages or beneficial effects:
the embodiment of the invention provides a battery pack box body, which comprises a box body and a fire extinguishing mechanism; the box body comprises a plurality of cross beams and a plurality of longitudinal beams, the cross beams are arranged at intervals, the longitudinal beams and the cross beams are arranged in a staggered mode to jointly enclose a plurality of mounting bodies for mounting the battery module, and the wall body of at least one of the mounting bodies is provided with a containing cavity; the fire extinguishing mechanism is accommodated in the accommodating cavity and used for overflowing fire extinguishing materials to extinguish fire in a high-temperature environment with the thermal runaway of the battery core of the battery module. On one hand, the fire extinguishing mechanism is directly arranged on the wall body of the installation body, so that the space of the cross beam and the longitudinal beam can be fully utilized, the space additionally occupied is reduced, and the structure is more compact and reliable; on the other hand, the fire extinguishing assembly can directly overflow at the high temperature of the thermal runaway of the battery core to extinguish fire, and compared with an externally-added fire extinguishing tank, the fire extinguishing process is more convenient, reliable and safe.
The embodiment of the invention also provides a battery pack, which comprises the battery pack box body. Therefore, the battery pack also has the advantages of small occupied space and high use convenience, reliability and safety.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery pack case according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a case body of a battery pack case according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion at I of FIG. 2;
fig. 4 is a schematic cross-sectional view of a metal casing of a battery pack case according to an embodiment of the present invention;
fig. 5 is a schematic structural view of another battery pack case according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a partial structure of another battery pack case according to an embodiment of the present invention;
fig. 7 is a schematic diagram showing a partial structure of another battery pack case according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a part of another battery pack case according to the embodiment of the present invention;
Fig. 9 is a schematic diagram showing a partial structure of another battery pack case according to an embodiment of the present invention;
fig. 10 is a schematic view showing a partial structure of another battery pack case according to the embodiment of the present invention;
fig. 11 is a schematic diagram showing a partial structure of another battery pack case according to an embodiment of the present invention.
Icon: 100-a battery pack case; 101-a box body; 103-a cross beam; 105-stringers; 107-mounting body; 109-a receiving cavity; 111-a metal packaging shell; 113-a first opening; 115-a second opening; 117-injection holes; 119-mounting steps; 121-an extension mount; 123-cavity; 125-communicating grooves; 127-accommodating the cavity; 128-hollowed-out cavity; 129-heat insulating mat; 131-edge beams; 133-floor.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the related art, in order to prevent thermal runaway diffusion of a battery pack, fire is usually extinguished by using a fire extinguishing tank filled with a fire extinguishing agent, the fire extinguishing tank is preloaded with a certain pressure and connected into the battery pack by using a pipe, and a shut-off valve is provided on the pipe, so that when a fire occurs, the fire extinguishing agent can be injected into the battery pack by opening the shut-off valve and utilizing the pressure in the fire extinguishing tank to achieve the purpose of extinguishing/cooling and prevent further thermal runaway diffusion. However, the fire is extinguished by adopting an external fire extinguishing tank, so that the problem of large occupied space exists, the use of a pressure tank and a switch valve is needed in the fire extinguishing process, and the problem of low convenience and reliability exists.
In view of this, this embodiment provides a battery package, has directly seted up the accommodation chamber on its battery package box, can be used to the fire extinguishing mechanism of accommodation for fire extinguishing mechanism can directly spill over fire extinguishing material under the high temperature environment of electric core thermal runaway and put out a fire, can reduce the space that occupies effectively, and improve the convenience, reliability and the security of fire extinguishing operation. The structure of the battery pack will be described in detail.
Fig. 1 is a schematic structural diagram of a battery pack case 100 according to the present embodiment; fig. 2 is a schematic structural diagram of a case body 101 of a battery pack case 100 according to the present embodiment. Referring to fig. 1 and 2, the present embodiment provides a battery pack, which includes a battery pack case 100 shown in fig. 1 and 2 and a plurality of battery modules. The plurality of battery modules are mounted in the battery pack case 100 to ensure the normal operation of the charge and discharge operations.
In detail, referring to fig. 1 and 2 again, in the present embodiment, the battery pack case 100 includes a case body 101, a top plate (shown in the drawing) covering the top of the case body 101, and a bottom plate 133 covering the bottom of the case body 101. The box body 101 includes a plurality of cross beams 103 and a plurality of longitudinal beams 105, the plurality of cross beams 103 are arranged at intervals along a first direction (i.e. ab direction in fig. 1), the plurality of longitudinal beams 105 are arranged at intervals along a second direction (i.e. cd direction in fig. 2) forming an included angle with the first direction, and the plurality of longitudinal beams 105 and the plurality of cross beams 103 are arranged in a staggered manner to jointly enclose a plurality of mounting bodies 107, and each mounting body 107 is used for mounting one or more battery modules. The roof is fixed connection with the upper ends of crossbeam 103 and longeron 105, and bottom plate 133 is fixed connection with the lower extreme of crossbeam 103 and longeron 105 to seal the opening at installation body 107 both ends, guarantee stability and reliability after the battery module installation.
As shown in fig. 1 and 2, the box body 101 specifically includes four cross members 103 disposed at intervals in the first direction and three longitudinal members 105 disposed at intervals in the second direction. The four cross beams 103 and the three longitudinal beams 105 are arranged in a staggered manner to form six mounting bodies 107, each mounting body 107 is of an annular structure, and each mounting body 107 can be used for mounting one or more battery modules, so that the stability and reliability of the battery modules are ensured. Of course, in other embodiments, the mounting body 107 may also have a semi-closed structure with an opening, or other structures, so long as the stability of the battery module after being mounted can be ensured, and the embodiment is not limited.
It should be further noted that, in the present embodiment, the lengths of the four cross beams 103 are the same, the lengths of the three longitudinal beams 105 are also the same, and the first direction and the second direction are perpendicular, so that six mounting bodies 107 formed by the four cross beams 103 and the three longitudinal beams 105 are all in a square structure, so as to facilitate the installation and the removal of the battery module. Of course, in other embodiments, the number of the cross members 103 and the longitudinal members 105 may be adjusted according to the requirements, which is not limited in this embodiment.
Meanwhile, in the present embodiment, a receiving chamber 109 is provided on at least one of the six mounting bodies 107. The fire extinguishing mechanism is matched with the accommodating cavities 109 in number, is accommodated in the accommodating cavities 109 and is used for overflowing fire extinguishing materials to extinguish fire in a high-temperature environment with thermal runaway of the battery cells of the battery module.
On the one hand, the fire extinguishing mechanism is directly arranged on the wall body of the mounting body 107, so that the space of the cross beam 103 and the longitudinal beam 105 can be fully utilized, the space additionally occupied by the fire extinguishing mechanism is reduced, the structure of the box body 101 is more compact and reliable, and the structure of the whole battery pack is more compact and reliable; on the other hand, the fire extinguishing assembly can directly overflow at the high temperature of the thermal runaway of the battery core to extinguish the fire, compared with an externally-added fire extinguishing tank, the fire extinguishing process is more convenient, reliable and safe, and the installation, the disassembly and the maintenance operation of the fire extinguishing assembly are more convenient. Meanwhile, in the present embodiment, since the case body 101 is formed by staggering the cross beams 103 and the longitudinal beams 105, the case body 101 can also adjust the interval between the adjacent cross beams 103 or the adjacent longitudinal beams 105 according to the size of the battery module, thereby sufficiently adapting to the battery modules of various sizes and improving the compatibility of the battery pack.
Alternatively, in the present embodiment, the wall of each of the six mounting bodies 107 has at least one receiving cavity 109. The arrangement is such that the accommodating chambers 109 are located at the circumferential side of the battery module, and the number of the accommodating chambers 109 may be one or a plurality. The fire extinguishing mechanism is matched with the accommodating cavities 109 in number, is accommodated in the accommodating cavities 109 and is used for overflowing fire extinguishing materials to extinguish fire in a high-temperature environment with thermal runaway of the battery cells of the battery module.
Referring to fig. 1 and 2 again, in the present embodiment, the mounting body 107 has four walls that are circumferentially looped around the battery module, and the four walls are connected end to form a square mounting body 107. At least one accommodating cavity 109 is formed in at least one of the four walls of the mounting body 107, and a fire extinguishing mechanism is accommodated in each accommodating cavity 109. Through such setting for the electric core thermal runaway of every battery module can both obtain effectively to put out a fire when handling, thereby can prevent thermal runaway diffusion to other battery modules, and then can improve the security of battery package to a certain extent.
Alternatively, in this embodiment, each of the four walls is provided with at least one accommodating cavity 109, and each of the electric cores of the battery module is opposite to at least one fire extinguishing mechanism. Through setting up like this for every electric core homoenergetic is relative with fire extinguishing mechanism, thereby when making any electric core in the battery module appear thermal runaway, homoenergetic is put out a fire effectively and is handled, reduces the risk of diffusion to other battery modules then, fully improves the security and the reliability of battery package.
In detail, referring to fig. 1 again, in the present embodiment, two accommodating cavities 109 are provided in each of the four walls, and the two accommodating cavities 109 are arranged at intervals, so that eight accommodating cavities 109 are provided on the peripheral side of each battery module, and any two adjacent battery modules share the accommodating cavity 109 therebetween, and the whole battery pack case 100 has thirty-four accommodating cavities 109. Thirty-four of the accommodating chambers 109 can accommodate thirty-four fire extinguishing mechanisms, thereby sufficiently improving fire extinguishing efficiency and quality and ensuring safety and reliability of the battery pack. Of course, in other embodiments, the number of the accommodating cavities 109 formed on each wall body can be adjusted according to the requirement, and the embodiment is not limited.
In more detail, fig. 3 is a partial enlarged view at I of fig. 2. Referring to fig. 1 to 3, in the present embodiment, the accommodating cavity 109 is a hollow cavity formed on the wall, and the accommodating cavity 109 has a first opening 113 facing the battery module. The fire extinguishing mechanism comprises a metal packaging shell 111 and fire extinguishing materials contained in the metal packaging shell 111, the metal packaging shell 111 is approximately of a cuboid structure and is matched with the shape of the containing cavity 109, the metal packaging shell 111 is provided with an injection hole 117, the injection hole 117 is a circular through hole, a hot-melt plugging piece is arranged at the injection hole 117, the metal packaging shell 111 is contained in the containing cavity 109, and the injection hole 117 and the hot-melt plugging piece are exposed through the first opening 113. When the battery cells of the battery module are thermally out of control, the hot-melt blocking member can be melted, so that the fire extinguishing material overflows from the injection hole 117 and flows toward the battery module to extinguish the fire. Through the arrangement, when the fire extinguishing material is filled, the fire extinguishing material can be filled into the metal packaging shell 111, and then the injection hole 117 is plugged by adopting the hot-melt plugging piece under the hot-melt environment, so that the fire extinguishing material filling machine is simple and convenient. When the battery cell is out of control, the hot-melt plugging piece melts at the height, so that the injection hole 117 is communicated with the outside, and the fire extinguishing material can overflow for extinguishing a fire.
That is, after such arrangement, on the one hand, the installation, the disassembly and the maintenance of the fire extinguishing mechanism are facilitated, and only the metal packaging case 111 needs to be disassembled and installed; on the other hand, the overflow of the fire extinguishing material is also convenient, and the efficiency and the quality of the fire extinguishing operation are ensured, thereby ensuring the reliability and the safety of the battery pack.
Alternatively, in the present embodiment, the accommodating cavity 109 further has a second opening 115, and the metal package housing 111 is accommodated in the accommodating cavity 109 through the second opening 115. The accommodating chamber 109 is provided with a mounting step 119 around the circumference of the second opening 115, the metal package case 111 is provided with an extension mounting member 121, the extension mounting member 121 has a plate-like structure, and the extension mounting member 121 is connected with the mounting step 119. By the cooperation of the mounting step 119 and the extension mounting member 121, stability and reliability of the metal package housing 111 after mounting can be advantageously ensured, so that reliability and stability of fire extinguishing operation can be further improved to improve reliability and safety of the battery pack.
Specifically, the accommodating chamber 109 has two mounting steps 119 located in the circumferential direction of the second opening 115, and the two mounting steps 119 are spaced apart. Two ends of the metal package case 111 are respectively provided with one extension mounting piece 121, and the two extension mounting pieces 121 are connected with the two mounting steps 119 in one-to-one correspondence. The connection and matching modes of the mounting step 119 and the extension mounting member 121 may be selected from laser, fastening, bolting, glue bonding, magnetic attraction, etc., so that stability and reliability of the connection between the mounting step 119 and the extension mounting member can be ensured.
Fig. 4 is a schematic cross-sectional view of a metal package casing 111 of the battery pack case 100 according to the present embodiment. Referring to fig. 4, in the present embodiment, the accommodating cavity 109 has a plurality of cavities 123 disposed side by side, each cavity 123 extends along the direction ef in fig. 1, and the plurality of cavities 123 are disposed in communication through the communication slot 125, and the injection hole 117 is in communication with any one of the plurality of cavities 123. By such arrangement, more fire extinguishing material can be contained in each containing cavity 109, thereby further improving the safety and reliability of the battery pack. Of course, in other embodiments, the cavity 123 may extend along the first direction or the second direction, so as to ensure the fire extinguishing effect, which is not described in detail in this embodiment.
Fig. 5 is a schematic structural diagram of another battery pack case 100 according to the present embodiment; fig. 6 is a schematic diagram illustrating a partial structure of another battery pack case 100 according to the present embodiment; fig. 7 is a schematic diagram of a part of a battery pack case 100 according to another embodiment; fig. 8 is a schematic diagram of a part of a battery pack case 100 according to another embodiment; fig. 9 is a schematic diagram showing a partial structure of another battery pack case 100 according to the present embodiment. Referring to fig. 5 to 9, another battery pack case 100 structure is provided in this embodiment, which is different from the first battery pack case 100 structure in that the cross beam 103 and the longitudinal beam 105 of the second battery pack case 100 are hollow structures, and a cavity is formed therein to accommodate fire extinguishing materials.
In detail, referring to fig. 5 to 9 again, in the present embodiment, each cross beam 103 and each longitudinal beam 105 of the box body 101 are hollow and each have a receiving cavity 127. The cross member 103 and the side member 105 define a partial accommodating cavity 127 corresponding to a portion of each mounting body 107, and an accommodating cavity 109 is formed. That is, in the second battery pack case 100, the accommodating chamber 109 is a part of the length of the accommodating cavity 127. Correspondingly, at this time, the fire extinguishing mechanism specifically comprises fire extinguishing materials, the fire extinguishing materials are accommodated in each accommodating cavity 127, and when the battery cells of the battery module are out of control, the fire extinguishing materials can overflow from the accommodating cavities 127 and flow into the battery module to extinguish the fire. Through such setting for need not to add the casing and hold fire extinguishing module, but make full use of crossbeam 103 and longeron 105 self space, thereby can further guarantee the compactness of battery package box 100 structure, improve space utilization. Meanwhile, the device is convenient for the fire extinguishing material to overflow for fire extinguishing operation, and can fully ensure the fire extinguishing efficiency and quality and ensure the safety and reliability of the battery pack.
In more detail, referring to fig. 6 and 8 again, in the present embodiment, the cavity structures of the cross beam 103 and the longitudinal beam 105 may be set to be the same, and the cross beam 103 and the longitudinal beam 105 may be manufactured by simultaneously packaging two ends of the cavity and injecting the fire extinguishing material by forming the injection hole 117.
In particular, the beam 103 may be configured to have one or more receiving cavities 127, and each receiving cavity 127 may have a structure in which both ends are simultaneously encapsulated. For example, in the structure shown in fig. 6, the beam 103 may be provided with five accommodating cavities 127, and each accommodating cavity 127 adopts a structure with two ends being sealed at the same time, and can be used for accommodating fire extinguishing materials. Meanwhile, when a plurality of accommodating cavities 127 are provided, the accommodating cavities 127 are communicated or independently arranged, and when the accommodating cavities 127 are communicated, the beam 103 is provided with injection holes 117 communicated with any one of the accommodating cavities 109, and when the accommodating cavities 127 are independently arranged, the beam 103 is provided with injection holes 117 communicated with each accommodating cavity 127. And, a hot-melt blocking member is also provided at the injection hole 117, which can prevent the escape of the fire extinguishing material from the injection hole 117 when the battery module is not thermally out of control. Since the beam 103 has a structure in which both ends are simultaneously sealed, the injection hole 117 is opened in order to ensure injection of the fire extinguishing material. Meanwhile, due to the arrangement of the injection hole 117, when the battery cells of the battery module are thermally out of control, the hot-melt blocking member can be melted so that the fire extinguishing material can overflow from the storage cavity 127 and flow into the battery module to extinguish the fire.
Similarly, the stringers 105 may be configured with one or more receiving cavities 127, where each receiving cavity 127 can be configured with both ends encapsulated. For example, in the structure shown in fig. 6, the longitudinal beam 105 may also be provided with five accommodating cavities 127, and each accommodating cavity 127 adopts a structure with two ends being simultaneously encapsulated, and can be used for accommodating fire extinguishing materials. Meanwhile, when a plurality of accommodating cavities 127 are provided, the accommodating cavities 127 are communicated or independently arranged at this time, and when the accommodating cavities 127 are communicated, injection holes 117 communicated with any one of the accommodating cavities 109 are formed in the longitudinal beam 105, and when the accommodating cavities 127 are independently arranged, injection holes 117 communicated with each accommodating cavity 127 are formed in the longitudinal beam 105. And, the injection hole 117 department also is provided with the hot melt shutoff piece, can prevent fire extinguishing material from spilling over from injection hole 117 when the battery module is not thermal runaway, also can melt when the battery module is out of control and make fire extinguishing material spill over and put out a fire.
In this embodiment, the lengths of the accommodating cavities 127 may be the same or may be different, and the shapes may be the same, for example, the cavities may be rectangular in cross section, or may be different, for example, some cavities may be triangular in cross section, some cavities may be rectangular in cross section, etc., so that the fire extinguishing effect may be ensured.
Alternatively, in order to ensure that the fire extinguishing process is effectively performed when each battery module is thermally out of control, in this embodiment, all the receiving cavities 127 of the longitudinal beam 105 and the transverse beam 103 may be disposed in communication, and the injection hole 117 may be formed in any one of the receiving cavities 127. By the arrangement, the machining and manufacturing processes of the cross beam 103 and the longitudinal beam 105 can be further simplified, and the machining efficiency is ensured; meanwhile, when thermal runaway occurs in one position, the fire extinguishing materials in all the cross beams 103 and the longitudinal beams 105 can be fully utilized to extinguish the thermal runaway position, and the fire extinguishing efficiency and quality can be fully ensured. Of course, a plurality of injection holes 117 may be provided, so that each battery module has at least one injection hole 117 in the circumferential direction, so as to ensure fire extinguishing efficiency, which is not repeated in this embodiment.
Meanwhile, in order to ensure that the fire extinguishing material can overflow in a high temperature state, in the present embodiment, the positions of the cross beam 103 and the side beam 105 opposite to the battery module may be thinned, and prepared using a material having a low melting point, so as to ensure that the cross beam 103 and the side beam 105 can melt themselves in a high temperature state to overflow the fire extinguishing material.
In this embodiment, the plurality of cross members 103 and the plurality of longitudinal members 105 may be disposed in areas, for example, among all the accommodating cavities 127 of the cross members 105 and the cross members 103, a part of the accommodating cavities 127 may be disposed in a communicating manner, another part of the accommodating cavities 127 may be disposed independently, any one of the plurality of accommodating cavities 127 disposed in a communicating manner may be disposed with an injection hole 117, and each of the plurality of accommodating cavities 127 disposed independently may be disposed with an injection hole 117, so as to sufficiently ensure the fire extinguishing effect. Through such setting, on the one hand can improve the inconvenience of regional interval remote position intercommunication, on the other hand also can fully control extinguishing material's splendid attire volume to avoid extinguishing material too much and the overweight problem of quality that causes to appear, thereby fully guarantee the security performance and the performance of battery package.
It should be noted that, in this embodiment, all the accommodating cavities 127 in the longitudinal beam 105 and the transverse beam 103 may be set independently, each accommodating cavity 127 is provided with an injection hole 117, and each injection hole 117 is located in the corresponding mounting body 107 around the corresponding battery module. The injection holes 117 are guaranteed to be circumferentially arranged around the battery modules, so that when any one battery module is out of control, fire extinguishing materials can overflow timely to perform fire extinguishing operation, and the safety performance and the service performance of the battery pack can be fully guaranteed.
Fig. 10 is a schematic diagram showing a partial structure of another battery pack case 100 according to the present embodiment; fig. 11 is a schematic diagram showing a partial structure of another battery pack case 100 according to the present embodiment. Referring to fig. 10 to 11, in this embodiment, the cross beam 103 and the longitudinal beam 105 may be sequentially encapsulated from the two ends of the cavity, so as to facilitate the injection of the fire extinguishing material from one end of the post encapsulation.
In detail, referring to fig. 10 again, in the present embodiment, the beam 103 has five accommodating cavities 127, and the five accommodating cavities 127 are each of a structure with two ends encapsulated in sequence, and each accommodating cavity 127 can be used for accommodating fire extinguishing materials. Meanwhile, the plurality of accommodating cavities 127 are communicated or independently arranged, and when the plurality of accommodating cavities 127 are communicated, fire extinguishing material is injected from any one of the plurality of accommodating cavities 127 at one end of the rear package; when the plurality of accommodating cavities 127 are independently provided, the fire extinguishing material is injected from each accommodating cavity 127 at one end of the rear package. That is, the fire extinguishing material can be injected from the opening not sealed at the other end by performing the manufacturing in a front-rear sealing manner, so that the injection hole 117 does not need to be opened, the manufacturing cost can be saved, and the manufacturing process can be further simplified. And, at this time, the cross member 103 may be provided with a thinned portion, or a low melting point material may be directly used, by which the cross member 103 may be melted to allow the fire extinguishing material to overflow from the container cavity 127 and flow toward the battery module when the battery cells of the battery module are thermally out of control, so as to extinguish the fire.
Similarly, the longitudinal beam 105 is provided with five accommodating cavities 127, the five accommodating cavities 127 are respectively of a structure with two ends being sequentially encapsulated, and each accommodating cavity 127 can be used for accommodating fire extinguishing materials. Meanwhile, the plurality of accommodating cavities 127 are communicated or independently arranged, and when the plurality of accommodating cavities 127 are communicated, fire extinguishing material is injected from any one of the plurality of accommodating cavities 127 at one end of the rear package; when the plurality of accommodating cavities 127 are independently provided, the fire extinguishing material is injected from each accommodating cavity 127 at one end of the rear package. That is, the fire extinguishing material can be injected from the opening not sealed at the other end by performing the manufacturing in a front-rear sealing manner, so that the injection hole 117 does not need to be opened, the manufacturing cost can be saved, and the manufacturing process can be further simplified. And, in this case, the side member 105 may be provided with a thinned portion, or a low melting point material may be directly used, by which the side member 105 may be melted to allow the fire extinguishing material to overflow from the container cavity 127 and flow toward the battery module when the battery cells of the battery module are thermally out of control, so as to extinguish the fire.
In this embodiment, the size of the injection hole 117 is smaller than the size of the corresponding cavity package, and the size of the injection hole 117 is smaller than or equal to 1/2 of the size of the box cross member 103 or the longitudinal member 105. By the arrangement, on one hand, the structural strength of the box body 101 is not affected, and the charge and discharge operation of the battery pack can be ensured; on the other hand, the injection of the fire extinguishing material from the injection hole 117 is facilitated, and the safety performance of the battery pack can be ensured.
Referring to fig. 7 and 11 again, in this embodiment, not every cavity of the cross beam 103 and the longitudinal beam 105 is used for accommodating fire extinguishing materials, for example, as shown in fig. 7 and 11, the cross beam 103 has a plurality of cavities, for example, five cavities, one of the five cavities is the accommodating cavity 127, the other four cavities are the hollow cavities 128, two ends of the accommodating cavity 127 are completely encapsulated, and the hollow cavities 128 are not encapsulated. By the arrangement, the packaging step can be saved, and only the cavity needing to be filled with the fire extinguishing material is required to be packaged.
Similarly, the longitudinal beam 105 may be provided with five cavities, one of the five cavities is a containing cavity 127, the other four cavities are hollow cavities 128, two ends of the containing cavity 127 are completely encapsulated, and the four hollow cavities 128 are in hollow arrangement and are not encapsulated. By the arrangement, the packaging step can be saved, and only the cavity needing to be filled with the fire extinguishing material is required to be packaged.
In other embodiments, the number of the cavities of the cross beam 103 and the longitudinal beam 105, the number of the accommodating cavities 127 of the cross beam 103 and the longitudinal beam 105, and the number of the hollow cavities 128 of the cross beam 103 and the longitudinal beam 105 may be adjusted according to the requirements, so as to ensure the efficiency and quality of the fire extinguishing operation, which is not limited in this embodiment.
It should be noted that, the cavities of the cross beam 103 and the longitudinal beam 105 may be formed by injection molding, or may be formed by other manners; the packaging modes of the cavities of the cross beam 103 and the longitudinal beam 105 can be hot-melt sealing, laser welding, gluing and the like, and the embodiment is not limited.
In addition, it should be noted that, whether the first type of battery pack case 100 structure or the second type of battery pack case 100 structure is adopted; whether the cross beam 103 and the longitudinal beam 105 are manufactured in a simultaneous packaging mode or the cross beam 103 and the longitudinal beam 105 are manufactured in a front-back packaging mode; regardless of the number of receiving cavities 127 and hollowed-out cavities 128, in this embodiment, the fire extinguishing material may be selected to be at least one of a coolant, an electrolyte additive, or a fire extinguishing agent.
The coolant may be at least one selected from perfluorohexane, perfluorononene, hydrofluorocarbons (HFC), and freon, wherein freon mainly comprises R134a (R12 substitute refrigerant), R125, R32, R407C, R A (R22 substitute refrigerant), R152, etc. The electrolyte additive may be selected to be ethoxypentafluoroethylene triphosphazene. The fire extinguishing agent may be selected from hexafluoropropane (HFC-236 fa), heptafluoropropane (HFC-227 ea/FM 200), perfluoro hexanone, aerosol, carbon dioxide, etc., and the description thereof will not be repeated in this embodiment.
Referring to fig. 5 again, whether the first battery pack case 100 or the second battery pack case 100 is used, in this embodiment, a plurality of heat insulation pads 129 are disposed on the wall of each mounting body 107, and the plurality of heat insulation pads 129 are disposed around the circumference of the battery module and between the battery module and the corresponding cross beam 103 or longitudinal beam 105. Through the arrangement of the heat insulation pad 129, the plurality of battery modules can be further separated, so that thermal runaway diffusion of one battery module to another battery module is further avoided, and the safety and reliability of the battery pack are fully ensured.
In this embodiment, a heat insulation pad 129 is disposed on four walls of each mounting body 107, so that the periphery of the battery module is provided with a heat insulation pad 129, thereby fully ensuring the safety and reliability of the battery pack. Of course, in other embodiments, the number of the heat insulation pads 129 can be adjusted according to the requirement, and the present embodiment is not limited thereto.
Referring to fig. 1 and 5 again, whether the first battery pack case 100 structure or the second battery pack case 100 structure is adopted, in this embodiment, the battery pack case 100 further includes a plurality of side beams 131, the side beams 131 may be made of a material with higher strength, and the side beams 131 are sequentially connected end to form an annular mounting chamber, the case body 101 is disposed in the annular mounting chamber, the cross beam 103 is connected with the adjacent side beams 131, and the longitudinal beam 105 is connected with the adjacent side beams 131. The strength of the box body 101 can be improved through the arrangement of the boundary beam 131, and the strength of a battery pack formed after the battery module is installed is ensured, so that the safety performance and the service performance of the battery pack are ensured.
Taking the structure of the first battery pack case 100 shown in fig. 1 to 4 as an example, the manufacturing process, the working principle and the beneficial effects of the battery pack provided by the embodiment of the invention will be described in detail below:
when the battery pack is manufactured, the four cross beams 103 and the three longitudinal beams 105 can be staggered to form the box body 101 and are enclosed into six mounting bodies 107, then two containing grooves are formed in each wall body of each mounting body 107, and thirty-four containing grooves are formed in total; next, a fire extinguishing material is injected into the metal packaging case 111 through the injection hole 117 to form thirty-four fire extinguishing mechanisms; then, thirty-four fire extinguishing mechanisms are respectively arranged in thirty-four accommodating grooves, so that eight fire extinguishing mechanisms are arranged around the circumference of each battery module; secondly, connecting and matching the side beam 131 with the cross beam 103 or the longitudinal beam 105 at the corresponding position of the box body 101; finally, the battery module is mounted in the mounting body 107. After the assembly is completed, the battery pack can perform charge and discharge operations.
In the above process, on one hand, the fire extinguishing mechanism of the battery pack is directly installed on the wall body of the installation body 107, so that the space of the cross beam 103 and the longitudinal beam 105 can be fully utilized, the space occupied additionally is reduced, and the structure is more compact and reliable; on the other hand, the fire extinguishing assembly can directly overflow at the high temperature of the thermal runaway of the battery core to extinguish fire, and compared with an externally-added fire extinguishing tank, the fire extinguishing process is more convenient, reliable and safe.
In summary, the embodiments of the present invention provide a battery pack case 100 and a battery pack with small occupied space and high convenience, reliability and safety in use.
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (14)
1. A battery pack case, comprising:
the box body comprises a plurality of cross beams and a plurality of longitudinal beams, wherein the cross beams are arranged at intervals, the longitudinal beams and the cross beams are arranged in a staggered mode to jointly enclose a plurality of mounting bodies for mounting the battery module, and the wall body of at least one of the mounting bodies is provided with a containing cavity;
the fire extinguishing mechanism is accommodated in the accommodating cavity and is used for overflowing fire extinguishing materials to extinguish fire in a high-temperature environment with thermal runaway of the battery cells of the battery module;
the accommodating cavity is a hollowed-out cavity formed in the wall body, and is provided with a first opening facing the battery module;
The fire extinguishing mechanism comprises a metal packaging shell and a fire extinguishing material accommodated in the metal packaging shell, wherein an injection hole is formed in the metal packaging shell, a hot-melt plugging piece is arranged at the injection hole, the metal packaging shell is accommodated in the accommodating cavity, and the injection hole and the hot-melt plugging piece are exposed out through the first opening;
when the electric core of the battery module is out of control, the hot-melt plugging piece can be melted, so that the fire extinguishing material overflows from the injection hole and flows to the battery module to extinguish fire;
the accommodating cavity is also provided with a second opening, and the metal packaging shell is accommodated in the accommodating cavity through the second opening;
the accommodating cavity is provided with an installation step around the circumference of the second opening, the metal packaging shell is provided with an extension installation piece, and the extension installation piece is connected with the installation step.
2. The battery pack case according to claim 1, wherein:
the installation body is annular, and has four around the circumference of battery module is encircled the wall body, four the wall body head and the tail are connected, and four at least one of the wall body at least one the holding chamber has been seted up on the wall body, every the holding intracavity all holds fire extinguishing mechanism.
3. The battery pack case according to claim 2, wherein:
at least one accommodating cavity is formed in each wall body, and each electric core of the battery module is opposite to at least one fire extinguishing mechanism.
4. The battery pack case according to claim 1, wherein:
the accommodating cavity is provided with two mounting steps positioned in the circumferential direction of the second opening, and the two mounting steps are arranged at intervals; two ends of the metal packaging shell are respectively provided with one extending mounting piece, and the two extending mounting pieces are connected with the two mounting steps in one-to-one correspondence.
5. The battery pack case according to claim 1, wherein:
the accommodating cavity is internally provided with a plurality of cavities which are arranged side by side, the cavities are communicated, and the injection hole is communicated with any one of the cavities.
6. A battery pack case, characterized in that:
the box body comprises a plurality of cross beams and a plurality of longitudinal beams, wherein the cross beams are arranged at intervals, the longitudinal beams and the cross beams are arranged in a staggered mode to jointly enclose a plurality of mounting bodies for mounting the battery module, and the wall body of at least one of the mounting bodies is provided with a containing cavity;
The fire extinguishing mechanism is accommodated in the accommodating cavity and is used for overflowing fire extinguishing materials to extinguish fire in a high-temperature environment with thermal runaway of the battery cells of the battery module;
the cross beam and the longitudinal beam are hollow structures and are provided with accommodating cavities, and the cross beam and the longitudinal beam enclose a part of the accommodating cavities corresponding to the part of each installation body to form the accommodating cavities;
the fire extinguishing mechanism comprises a fire extinguishing material which is contained in the containing cavity, and when the battery core of the battery module is out of control, the fire extinguishing material can overflow from the containing cavity and flow to the battery module to extinguish the fire;
the cross beam and/or the longitudinal beam are/is provided with one or more accommodating cavities, the accommodating cavities are of a structure with two ends being simultaneously encapsulated, and when the cross beam and/or the longitudinal beam are provided with a plurality of accommodating cavities, the accommodating cavities are communicated or independently arranged; when the accommodating cavities are communicated, the cross beam and/or the longitudinal beam are/is provided with injection holes communicated with any one of the accommodating cavities; when a plurality of accommodating cavities are independently arranged, the cross beam and/or the longitudinal beam are/is provided with injection holes communicated with each accommodating cavity; the injection hole is provided with a hot-melt plugging piece, when the battery core of the battery module is out of control, the hot-melt plugging piece can be melted so that the fire extinguishing material can overflow from the accommodating cavity and flow to the battery module to extinguish the fire.
7. The battery pack case according to claim 6, wherein:
all the accommodating cavities of the longitudinal beam and the transverse beam are communicated, and the injection hole is formed in any one of the accommodating cavities;
or,
one part of the accommodating cavities are communicated with each other, the other part of the accommodating cavities are independently arranged, the filling hole is formed in any one of the plurality of accommodating cavities which are communicated with each other, and the filling hole is formed in each of the plurality of accommodating cavities which are independently arranged;
or,
all holding die cavities of longeron with the crossbeam all independently set up, every all seted up on the holding die cavity the filling hole, and every the filling hole all is located the correspondence the installation body is around corresponding battery module's circumference.
8. The battery pack case according to claim 7, wherein:
the cross beam is provided with one or more containing cavities, the two ends of each containing cavity are sequentially packaged, and when the cross beam is provided with a plurality of containing cavities, the containing cavities are communicated or independently arranged; when the plurality of accommodating cavities are communicated, the fire extinguishing material is injected from any one of the accommodating cavities at one end of the rear package; when a plurality of the accommodating cavities are independently arranged, the fire extinguishing material is injected from each accommodating cavity at one end of the rear package; when the electric core of the battery module is out of control, the cross beam can be melted so that the fire extinguishing material can overflow from the accommodating cavity and flow to the battery module for extinguishing fire;
And/or the number of the groups of groups,
the longitudinal beam is provided with one or more containing cavities, the two ends of each containing cavity are sequentially packaged, and when the longitudinal beam is provided with a plurality of containing cavities, the containing cavities are communicated or independently arranged; when the plurality of accommodating cavities are communicated, the fire extinguishing material is injected from any one of the accommodating cavities at one end of the rear package; when a plurality of the accommodating cavities are independently arranged, the fire extinguishing material is injected from each accommodating cavity at one end of the rear package; when the electric core of the battery module is out of control, the longitudinal beam can be melted, so that the fire extinguishing material can overflow from the accommodating cavity and flow to the battery module, and fire is extinguished.
9. The battery pack case according to claim 8, wherein:
the cross beam and the longitudinal beam are provided with thinning parts, and the thinning parts can be melted when the electric core is in thermal runaway so as to overflow the fire extinguishing material; and/or the materials of the cross beam and the longitudinal beam are low-melting-point materials, and the cross beam and the longitudinal beam can be melted when the electric core is in thermal runaway so as to overflow the fire extinguishing material.
10. The battery pack case according to claim 8, wherein:
the cross beam is provided with one or more cavities, each cavity is the accommodating cavity, and two ends of the cavities of the cross beam are completely encapsulated; or the cross beam is provided with a plurality of cavities, part of the cavities are accommodating cavities, two ends of the cavities of the accommodating cavities are completely encapsulated in the cavities of the cross beam, and the cavities of the accommodating cavities are not encapsulated in the cavities;
and/or the number of the groups of groups,
the longitudinal beam is provided with one or more cavities, each cavity is the accommodating cavity, and two ends of the cavities of the longitudinal beam are completely encapsulated; or the longitudinal beam is provided with a plurality of cavities, part of the cavities are accommodating cavities, two ends of the cavities of the accommodating cavities are completely encapsulated, and the cavities of the accommodating cavities are not encapsulated.
11. The battery pack case according to any one of claims 1 to 10, wherein:
the fire extinguishing material is at least one of a coolant, an electrolyte additive or a fire extinguishing agent.
12. The battery pack case according to any one of claims 1 to 10, wherein:
and a plurality of heat insulation pads are arranged on the wall body of each mounting body, are arranged around the circumference of the battery module and are positioned between the battery module and the corresponding cross beam or longitudinal beam.
13. The battery pack case according to any one of claims 1 to 10, wherein:
the battery pack box body further comprises a plurality of side beams, the side beams are sequentially connected end to form an annular mounting cavity, the box body is arranged in the annular mounting cavity, the cross beams are connected with the adjacent side beams, and the longitudinal beams are connected with the adjacent side beams.
14. A battery pack, comprising:
a plurality of battery modules and the battery pack case according to any one of claims 1 to 13, the plurality of battery modules being respectively provided in the plurality of mounting bodies.
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| CN202111681079.5A CN114284615B (en) | 2021-12-28 | 2021-12-28 | Battery pack box and battery pack |
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| CN202111681079.5A CN114284615B (en) | 2021-12-28 | 2021-12-28 | Battery pack box and battery pack |
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| CN114284615B true CN114284615B (en) | 2024-03-22 |
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| CN114976427A (en) * | 2022-06-16 | 2022-08-30 | 东风时代(武汉)电池系统有限公司 | Design and method of battery box with active fire extinguishing function |
| CN117748011B (en) * | 2024-02-09 | 2024-06-11 | 合众新能源汽车股份有限公司 | Battery module and electric equipment |
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| CN111933859A (en) * | 2020-09-16 | 2020-11-13 | 杭州途视信息技术有限公司 | Device for preventing lithium battery from spontaneous combustion |
| CN112086605A (en) * | 2020-10-19 | 2020-12-15 | 江苏时代新能源科技有限公司 | Battery, electric device, method and equipment for preparing battery |
| CN113793997A (en) * | 2021-08-02 | 2021-12-14 | 岚图汽车科技有限公司 | Power battery box body, fire extinguishing system and fire extinguishing method |
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| CN114284615A (en) | 2022-04-05 |
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Address after: 215500 room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: 215500 room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Changshu, Suzhou, Jiangsu Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |