CN115149176A - Lower box body, battery pack, exhaust method and electric device - Google Patents
Lower box body, battery pack, exhaust method and electric device Download PDFInfo
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- CN115149176A CN115149176A CN202210857699.8A CN202210857699A CN115149176A CN 115149176 A CN115149176 A CN 115149176A CN 202210857699 A CN202210857699 A CN 202210857699A CN 115149176 A CN115149176 A CN 115149176A
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- plate
- structural
- box body
- cavity
- lower box
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005422 blasting Methods 0.000 claims abstract description 34
- 239000003292 glue Substances 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims description 16
- 230000017525 heat dissipation Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 7
- 230000010354 integration Effects 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004880 explosion Methods 0.000 description 17
- 239000000243 solution Substances 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/358—External gas exhaust passages located on the battery cover or case
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a lower box body, a battery pack, an exhaust method and an electric device, wherein a bottom plate comprises at least two layers of structural plates, the structural plates comprise a first structural plate and a second structural plate from the top surface to the bottom surface of the bottom plate, and a confluence cavity is formed between the first structural plate and the second structural plate; the gas cell comprises a first structural plate and a second structural plate, wherein the first structural plate is provided with at least one confluence opening, the confluence opening comprises at least one gas inlet hole, the second structural plate is provided with a blasting valve, the gas inlet hole and the blasting valve are communicated with a confluence cavity, and the gas inlet hole is used for introducing gas discharged by a cell into the confluence cavity and is discharged by the blasting valve. The lower box body is designed to be of a cavity structure, the weight of the box body is reduced, the lower box body is provided with the junction and communicated with the blasting exhaust side of the battery cell stacking body, the effects of guiding exhaust and directional blasting are achieved, and the lower box body has the characteristics of light weight, high safety performance and the like.
Description
Technical Field
The invention belongs to the technical field of batteries, and relates to a lower box body, a battery pack, an exhaust method and an electric device.
Background
With the development of the new energy automobile industry, the safety and reliability problems of the electric automobile are more and more concerned, and the power battery as a core part of the electric automobile needs to be further innovated and iterated. The existing power battery has the problems of high weight, poor safety and the like, so that how to realize the light weight and the thermal runaway safety of the battery pack becomes a technical problem which needs to be solved urgently at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a lower box body, a battery pack, an exhaust method and an electric device.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a lower box, including a bottom plate, where the bottom plate includes at least two layers of structural plates, and the structural plates include a first structural plate and a second structural plate, and a confluence cavity is formed between the first structural plate and the second structural plate; the battery core assembly is characterized in that at least one confluence port is arranged on the first structural plate and comprises at least one air inlet hole, an explosion valve is arranged on the second structural plate, the air inlet hole and the explosion valve are communicated with the confluence cavity, and the air inlet hole is used for introducing gas discharged from the battery core into the confluence cavity and is discharged by the explosion valve.
As a preferred technical solution of the present invention, the bottom plate further includes a third structural plate located at the bottom of the second structural plate, and an integrated cavity is formed between the third structural plate and the second structural plate.
Preferably, the third structural plate is provided with a mounting structure of the blasting valve, the mounting structure comprises a mounting hole and a fixing hole which are formed in the third structural plate, the blasting valve is provided with a fixing bolt, the blasting valve extends into the mounting hole, and the fixing hole and the fixing bolt are detachably connected and fixed with the blasting valve.
Preferably, the air inlet end of the burst valve passes through the integration cavity and extends into the confluence cavity.
As a preferable technical solution of the present invention, the bottom plate further includes a fourth structural plate located at the bottom of the third structural plate, a protective cavity is formed between the fourth structural plate and the adjacent third structural plate, and the protective cavity is used for protecting and isolating the confluence cavity.
Preferably, a mounting groove is formed in the fourth structural plate at the position of the explosion valve, the mounting groove is of a sinking structure, and the mounting height of the explosion valve is lower than the depth of the mounting groove.
Preferably, a plugging piece is arranged between the blasting valve and the mounting groove, and the plugging piece is used for sealing the protection cavity.
As a preferable technical scheme of the invention, the air inlet is provided with a glue blocking strip, the glue blocking strip is positioned on the top surface of the first structural plate, and the glue blocking strip is annularly arranged around the air inlet.
Preferably, the edge ring of bottom plate is equipped with spacing strip, spacing strip is used for preventing that the structure from gluing from overflowing.
Preferably, at least one end face of the backplane is provided with a card panel.
In a second aspect, the invention provides a battery pack, where the battery pack includes an upper case, a cell stack body, and the lower case of the first aspect, where the upper case and the lower case are fastened to each other to form a placement cavity, the cell stack body is disposed in the placement cavity, and a blasting exhaust side of the cell stack body is disposed corresponding to a side of the lower case having the junction.
As a preferred technical solution of the present invention, the battery cell stacking body includes at least one battery cell arranged side by side, the battery cell is provided with an explosion-proof valve, the explosion-proof valves of the battery cells in the battery cell stacking body are all located on the same side, the number of the air holes on the bottom plate is the same as the number of the battery cells, and the explosion-proof valves of the battery cells and the air holes are arranged in one-to-one correspondence.
Preferably, the battery cell stacking body is a layer and is arranged in the placing cavity side by side along the horizontal direction.
As a preferred technical solution of the present invention, both side surfaces of the cell stack body are provided with insulating protection plates.
Preferably, both end faces of the battery cell stacking body are provided with fixing plates, and the fixing plates are fixed on the bottom plate and clamp and fix the battery cell stacking body.
As a preferable technical solution of the present invention, the upper box body includes a top plate, an edge of the top plate is an extension structure to form a side wall, and the top plate, the side wall and the bottom plate are fastened to form the placement cavity.
Preferably, a heat dissipation plate is provided between the top plate and the cell stack body.
Preferably, a heat conducting glue layer is arranged between the heat dissipation plate and the cell stack body.
Preferably, the battery pack further comprises a battery management device, a low-voltage plug-in, a high-voltage plug-in and a battery power distribution device, wherein a plug-in panel is arranged on the upper box body and/or the lower box body, and the battery management device, the low-voltage plug-in, the high-voltage plug-in and the battery power distribution device are electrically connected with the battery cell stacking body and are integrally arranged on the plug-in panel.
In a third aspect, the present invention provides a method of exhausting a battery pack according to the second aspect, the method comprising:
blasting exhaust gas generated by the battery cell stacking body enters the confluence cavity through the confluence port and is blasted and discharged from the bottom of the lower box body through the blasting valve.
In a fourth aspect, the present invention provides an electric device comprising at least one battery pack according to the second aspect.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the lower box body is arranged to be of a hollow structure and comprises the multiple layers of structural plates, so that the confluence cavity is formed among the structural plates, and in the use process, the generated gas of the battery core can be converged into the confluence cavity through the gas inlet and is directionally blasted and discharged by the blasting valve.
Drawings
FIG. 1 is a schematic top view of a lower housing according to one embodiment of the present invention;
FIG. 2 is a schematic view of the bottom structure of the lower case according to one embodiment of the present invention;
FIG. 3 is a schematic view of a mounting structure for a blast valve provided in an embodiment of the present invention;
FIG. 4 is a schematic structural view of a section along the direction A of the installation position of a blast valve provided in an embodiment of the present invention;
FIG. 5 is a schematic view of a portion of an intake vent provided in an embodiment of the present invention;
fig. 6 is a disassembled schematic view of a battery pack provided in an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a cell stack provided in an embodiment of the present invention;
fig. 8 is a schematic diagram of a cell structure provided in an embodiment of the present invention.
Wherein, 1-lower box body; 101-a base plate; 102-an air intake; 103-front plug-in panel; 104-rear plug-in panel; 105-an assembly seat; 106-a burst valve; 107-mounting holes; 108-mounting grooves; 109-fixing bolts; 110-fixing holes; 111-a sink chamber; 112-an integration cavity; 113-a protective cavity; 114-a glue blocking strip; 115-a closure; 2, putting the box body; 3-a cell stack; 4-a heat sink; 5-low pressure plug-in; 6-battery management means; 7-high voltage plug-in; 8-battery power distribution.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments.
In one embodiment, the present invention provides a lower box, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the lower box comprises a bottom plate 101, and as shown in fig. 4, the bottom plate 101 comprises at least two layers of structural plates, the structure comprises a first structural plate and a second structural plate, and a confluence cavity 111 is formed between the first structural plate and the second structural plate; the first structural plate is provided with at least one confluence opening, the confluence opening comprises at least one air inlet hole 102, the second structural plate is provided with a blasting valve 106, the air inlet hole 102 and the blasting valve 106 are both communicated with a confluence cavity 111, and the air inlet hole 102 is used for introducing gas discharged from the battery core into the confluence cavity 111 and discharging the gas from the blasting valve 106.
The lower box body 1 is of a hollow structure, a confluence cavity 111 is formed by utilizing a structural plate in a clamping mode, the air inlet holes 102 are communicated into the confluence cavity 111 to guide and convey explosion generated gas, the explosion valve 106 is used for directional explosion, the explosion direction is effectively controlled to be the bottom of a battery pack, the safety of the battery pack is improved, further, the lower box body 1 is of a hollow cavity structure, the overall energy density of the battery pack is improved under the condition that the weight of the lower box body is reduced, and the lower box body has the advantages of being high in safety, low in weight, low in cost and the like.
The manufacturing method of the lower box body is not specifically required and limited, and a person skilled in the art can manufacture the lower box body with the plate structure having the cavity according to the requirement, for example, the lower box body is formed by compression molding or injection molding and has an integral structure.
Specifically, the bottom plate 101 further includes a third structural plate located at the bottom of the second structural plate, and an integrated cavity 112 is formed between the third structural plate and the second structural plate; further, the third structural plate is provided with a mounting structure of the explosion valve 106, the mounting structure includes a mounting hole 107 and a fixing hole 110 which are arranged on the third structural plate, the explosion valve 106 is provided with a fixing bolt 109, the explosion valve 106 extends into the mounting hole 107, the fixing hole 110 and the fixing bolt 109 are detachably connected to fix the explosion valve 106, and the air inlet end of the explosion valve 106 penetrates through the integration cavity 112 and extends into the confluence cavity 111.
According to the invention, the integrated cavity 112 is formed by additionally arranging the structural plates, namely the structural plates are positioned on the outer side of the confluence cavity 111, so that the mounting structure of the explosion valve 106 is mounted in the integrated cavity 112, the mounting structure of the explosion valve 106 is effectively prevented from damaging the sealing property of the confluence cavity 111, and the formed integrated cavity 112 can protect the confluence cavity 111.
Specifically, the bottom plate 101 further includes a fourth structural plate located at the bottom of the third structural plate, a protective cavity 113 is formed between the fourth structural plate and the adjacent third structural plate, and the protective cavity 113 is used for protecting and isolating the junction cavity 111. According to the invention, the structural plate is arranged at the bottommost part of the bottom plate 101, so that the protective cavity 113 is formed by the structural plate and the adjacent structural plate, the cavity is used for further protecting the safety of the confluence cavity 111 and the integrated cavity 112, the sealing effect caused by damage of the structural plate due to collision is avoided, and the overall sealing effect of the battery pack is enhanced by the arrangement of the protective cavity 113.
Specifically, a mounting groove 108 is formed in the position, located at the blast valve 106, of the fourth structural plate, the mounting groove 108 is of a sinking structure, the mounting height of the blast valve 106 is lower than the depth of the mounting groove 108, a blocking piece 115 is arranged between the blast valve 106 and the mounting groove 108, and the blocking piece 115 is used for sealing the protection cavity 113. The sinking type mounting groove 108 is arranged, the mounting groove 108 sinks into the protection cavity 113, the blasting valve 106 sinks into the mounting groove 108 completely, bottom collision damage to the blasting valve 106 is effectively prevented, and furthermore, the plugging piece is arranged in the mounting groove 108, for example, the plugging piece can be sealant, sealing effect of the protection cavity 113 is enhanced, and sealing performance of the lower box is met.
It should be noted that, in the present invention, the plugging piece 115 may be used to plug and seal the mounting groove 106 and the blast valve 106, and optionally, the groove wall of the mounting groove 106 and the blast valve 106 are connected and sealed by means of splice welding.
Specifically, as shown in fig. 5, the air inlet 102 is provided with a glue blocking strip 114, the glue blocking strip 114 is located on the top surface of the first structural plate, and the glue blocking strip 114 is disposed around the air inlet 102. Further, the edge ring of bottom plate 101 is equipped with spacing, and spacing is used for preventing that the structure from gluing from overflowing.
According to the invention, the glue blocking strip 114 is arranged at the air inlet hole 102, so that when the lower box body and the battery cell stacking body are bonded and fixed by adopting structural glue, the glue blocking strip 114 can block the structural glue from flowing into the air inlet hole 102, and the glue blocking strip 114 can also strengthen the connection sealing property between the battery cell explosion-proof valve and the air inlet hole 102, further, the glue blocking strip 114 can be adjusted according to the structural adaptability of the battery cell explosion-proof valve, so that the battery cell explosion-proof valve is prevented from being damaged in the assembling process. In addition, the edge of the bottom plate 101 is provided with the limiting strips, when the structural adhesive between the battery cell stacked body and the lower box body is arranged, the limiting strips can lift the battery cell stacked body to a certain height (namely the thickness of the structural adhesive layer), prevent the structural adhesive from overflowing and effectively ensure the thickness consistency of the structural adhesive layer.
Specifically, at least one end face of the backplane 101 is provided with a card board. It should be noted that the position of the component removing panel disposed on the bottom board 101 in the present invention can be reasonably set according to actual needs, for example, two end faces of the bottom board 101 are both provided with a plug-in panel, which is a front plug-in panel 103 and a rear plug-in panel 104, so as to be used for integrally setting a plug-in component in the battery pack, an auxiliary device, an interface, and the like. Optionally, the card panel and the backplane 101 may be of an integral structure or a split structure, preferably of an integral structure, with less parts.
Optionally, the lower box body in the invention may have a splicing structure, so as to implement splicing expansion of the lower box body, specifically, the lower box body 1 includes splicing plates, each splicing plate corresponds to one cell stack body, that is, each splicing plate is provided with an air vent structure, and is communicated with an explosion exhaust side of the cell stack body, further, the splicing mode may be that fixing members are provided on two sides of the splicing plates, the two fixing members clamp the splicing plates, and adjacent splicing plates are fixedly connected, for example, the fixing members are fixed beams, the splicing plates are spliced and fixed as required, further, the fixed beams are placed along the splicing direction of the splicing plates, the two ends of the splicing plates are clamped, and the integrally spliced splicing plates are structurally fixed, optionally, the fixing modes between the splicing plates and the fixed beams are welding, screw connection or bolt connection. Therefore, the lower box body can be spliced and assembled according to the use requirement in the use process of the invention, and the adaptability of the invention is improved.
Optionally, the lower case of the present invention is further provided with an assembly structure, the assembly structure is used for installing and fixing the battery pack in the electric device, for example, the assembly structure may be an assembly seat 105 disposed at the edge of the lower case, the assembly seat 105 is detachably connected with the electric device, the detachable connection may be a bolt detachable connection, and further, the assembly seat 105 may be an integral structure with the lower case or a structure additionally disposed on the lower case.
The invention also provides a battery pack, as shown in fig. 6, the battery pack comprises an upper box body 2, a battery cell stack body 3 and the lower box body 1, the upper box body 2 and the lower box body 1 are mutually buckled to form a placing cavity, the battery cell stack body 3 is arranged in the placing cavity, and the blasting exhaust side of the battery cell stack body 3 is arranged corresponding to the side, provided with the junction, of the lower box body 1.
The shell of the battery pack only comprises the upper box body 2 and the lower box body 1 which are mutually buckled, the battery cell stacking body 3 is adopted, the structure of a battery module is cancelled, the number of parts of the shell of the battery pack and the parts of the battery module are reduced, the integrated design is realized, the overall structure of the battery pack is simple, the exhaust side of the battery cell stacking body 3 is guided by the air inlet hole 102 of the lower box body 1 and is directionally exploded and exhausted through the confluence cavity 111, and the bottom exhaust design has higher safety.
Specifically, as shown in fig. 7, the battery cell stacking body 3 includes at least one battery cell arranged side by side, the battery cell is provided with an explosion-proof valve, the explosion-proof valves of the battery cells in the battery cell stacking body 3 are all located on the same side, the number of the air inlet holes 102 on the bottom plate 101 is the same as the number of the battery cells, and the explosion-proof valves of the battery cells and the air inlet holes 102 are arranged in a one-to-one correspondence manner. Further, as shown in fig. 8, in the battery cell structure of the present invention, the poles of the battery cell are respectively disposed on the opposite end surfaces of the battery cell, and the explosion-proof valve of the battery cell is disposed on the side surface of the battery cell, so that in the stacked battery cell stack 3, the positive pole of the battery cell is located on the same side of the stacked battery cell stack 3, the negative pole is located on the other side of the stacked battery cell stack 3, and the explosion-proof valves of the battery cells are all located at the bottom of the stacked battery cell stack 3 and are communicated with the air inlet of the lower case 1.
It should be noted that, the battery cell stack 3 of the present invention includes the bus bar, and is used for forming a series-parallel loop for each battery cell, so as to ensure electric energy transmission in the battery pack, for example, the bus bar is a positive bus bar and a negative bus bar, and is connected with a pole of the battery cell through the bus bar, so as to realize series-connection between the battery cells.
Specifically, electric core stack body 3 is the one deck and arranges side by side along the horizontal direction and sets up in placing the cavity. According to the invention, the battery cell stacked body 3 is horizontally arranged in a layer manner, so that the flat design of the battery pack is realized, the whole weight of the battery pack is light, and the whole structure of the battery pack is stable.
Specifically, as shown in fig. 7 again, two side surfaces of the cell stack body 3 are provided with insulating protection plates; two terminal surfaces of electric core pile body 3 all are provided with the fixed plate, and the fixed plate is fixed in on the bottom plate 101 and presss from both sides and establishes fixed electric core pile body 3. According to the invention, the battery cell stacking body 3 is directly stacked on the lower box body 1 of the battery pack by the battery cells, the battery cell stacking body 3 is further fixed and limited by the insulating protection plate and the fixing plate, and the upper box body 2 and the lower box body 1 are used for flattening clamping and fixing, so that the structural stability of the battery pack is effectively ensured.
Specifically, the upper box body 2 comprises a top plate, the edge of the top plate is of an epitaxial structure to form a side wall, and the top plate, the side wall and the bottom plate 101 are buckled to form a placing cavity; a heat dissipation plate 4 is arranged between the top plate and the battery cell stacking body 3; a heat conducting adhesive layer is arranged between the heat dissipation plate 4 and the battery cell stacking body 3. Optionally, the heat dissipation plate 4 includes a heat dissipation inlet and a heat dissipation outlet for injecting and discharging the cooling medium, wherein the heat dissipation outlet and the heat dissipation outlet may be located on the same side of the heat dissipation plate 4 and integrally disposed on the plug-in board panel, so as to ensure the integration level of the overall structure.
The upper box body 2 comprises a top plate and an extending side wall, and can be directly buckled and sealed with the lower box body 1 with a flat-plate structure to form a placing cavity, wherein the side wall and the top plate are of an integrated structure, so that the structural stability of the upper box body 2 can be effectively improved, and the number of parts is reduced. In addition, the battery pack provided by the invention adopts upper cooling, and the heat conducting adhesive layer is arranged between the heat dissipation plate 4 and the battery cell stacked body 3, so that heat dissipation is ensured, the battery cell stacked body 3 is secondarily fixed by the structure of the heat dissipation plate 4 and the heat conducting adhesive layer, and the overall stability of the battery pack structure is effectively improved.
It should be noted that the preparation method of the upper box body 2 in the present invention is not specifically required or limited, and those skilled in the art can reasonably select the preparation method according to actual operation requirements, for example, the upper box body 2 is formed by stamping a sheet metal material or by non-metallic material.
It should be noted that, in the present invention, there is no specific requirement and no special limitation on the connection manner of the upper box 2 and the lower box 1, and a person skilled in the art can reasonably set according to the fixing requirement, for example, the upper box 2 and the lower box 1 are connected and fixed by using an adhesive or a detachable structure, and are connected and fixed by using a detachable structure, for example, a bolt seat and a threaded hole are provided on the side wall and/or the lower box 1, and the upper box 2 and the lower box 1 are connected and fixed by using a detachable connection of a bolt, further, a sealing structure can be provided at the connection position of the upper box 2 and the lower box 1, so as to effectively improve the sealing effect between the upper box 2 and the lower box 1, for example, the sealing structure can be a sealing gasket.
Specifically, the battery pack further comprises a battery management device 6, a low-voltage plug-in 5, a high-voltage plug-in 7 and a battery power distribution device 8, plug-in panels are arranged on the upper box 2 and/or the lower box 1, and the battery management device 6, the low-voltage plug-in 5, the high-voltage plug-in 7 and the battery power distribution device 8 are electrically connected with the battery cell stacking body 3 and are arranged on the plug-in panels in an integrated mode. According to the invention, the plug-in components in the battery pack are integrated on the plug-in panel, and the plug-in panel can be integrally arranged on the upper box body 2 and/or the lower box body 1, so that the integration level of the whole structure is ensured.
The invention provides an exhaust method of the battery pack, which comprises the following steps:
blasting exhaust generated by the battery cell stacking body 3 enters the confluence cavity 111 through the confluence port and is blasted and discharged from the bottom of the lower box body 1 through the blasting valve 106, so that rapid and safe pressure relief is realized. Further, different electric cores are discharged into the confluence cavity 111 through the corresponding air inlet holes 102.
The invention provides an electric device which comprises at least one battery pack.
According to a specific embodiment, the lower box body 1 and the battery pack comprising the lower box body 1 are integrally and modularly designed, the overall process is simple, the cost is low, the bottom exhaust design and the flattening structure are adopted, the overall weight is low, the safety is high, the number of parts is reduced by more than or equal to 15% through the integrated design, the battery module structure is omitted, and the energy density is improved by more than or equal to 10%.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the invention to the precise numerical values encompassed within the range for brevity and clarity.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The lower box body is characterized by comprising a bottom plate, wherein the bottom plate comprises at least two layers of structural plates from the top surface to the bottom surface of the bottom plate, the structural plates comprise a first structural plate and a second structural plate, and a confluence cavity is formed between the first structural plate and the second structural plate;
the gas cell comprises a first structural plate and a second structural plate, wherein the first structural plate is provided with at least one confluence opening, the confluence opening comprises at least one gas inlet hole, the second structural plate is provided with a blasting valve, the gas inlet hole and the blasting valve are communicated with a confluence cavity, and the gas inlet hole is used for introducing gas discharged by a cell into the confluence cavity and is discharged by the blasting valve.
2. The bottom box of claim 1, wherein the bottom panel further comprises a third structural panel at the bottom of the second structural panel, the third structural panel and the second structural panel forming an integrated cavity therebetween;
preferably, the third structural plate is provided with a mounting structure of the blasting valve, the mounting structure comprises a mounting hole and a fixing hole which are arranged on the third structural plate, the blasting valve is provided with a fixing bolt, the blasting valve extends into the mounting hole, and the fixing hole and the fixing bolt are detachably connected to fix the blasting valve;
preferably, the air inlet end of the burst valve passes through the integration cavity and extends into the confluence cavity.
3. The lower box body of claim 2, wherein the bottom plate further comprises a fourth structural plate located at the bottom of the third structural plate, and a protective cavity is formed between the fourth structural plate and the adjacent third structural plate, and is used for protecting and isolating the confluence cavity;
preferably, a mounting groove is formed in the fourth structural plate at the position of the blasting valve, the mounting groove is of a sinking structure, and the mounting height of the blasting valve is lower than the depth of the mounting groove;
preferably, a plugging piece is arranged between the blast valve and the mounting groove, and the plugging piece is used for sealing the protection cavity.
4. The lower box body according to any one of claims 1 to 3, wherein the air inlet is provided with a glue blocking strip, the glue blocking strip is positioned on the top surface of the first structural plate, and the glue blocking strip is arranged around the air inlet;
preferably, the edge of the bottom plate is annularly provided with a limiting strip, and the limiting strip is used for preventing the structural adhesive from overflowing;
preferably, at least one end face of the backplane is provided with a card panel.
5. A battery pack, which is characterized by comprising an upper box body, a battery cell stacking body and the lower box body as claimed in any one of claims 1 to 4, wherein the upper box body and the lower box body are mutually buckled to form a placing cavity, the battery cell stacking body is arranged in the placing cavity, and the blasting exhaust side of the battery cell stacking body is arranged corresponding to the side, provided with the confluence port, of the lower box body.
6. The battery pack according to claim 5, wherein the cell stack includes at least one side-by-side cell, the cell is provided with an explosion-proof valve, the explosion-proof valves of the cells in the cell stack are all located on the same side, the number of the air holes on the bottom plate is the same as the number of the cells, and the explosion-proof valves of the cells and the air holes are arranged in one-to-one correspondence;
preferably, the battery core stack body is one layer and arranges side by side along the horizontal direction and sets up in place in the cavity.
7. The battery pack according to claim 5 or 6, wherein both side surfaces of the cell stack are provided with insulating protection plates;
preferably, both end faces of the battery cell stacking body are provided with fixing plates, and the fixing plates are fixed on the bottom plate and clamp and fix the battery cell stacking body.
8. The battery pack of any one of claims 5-7, wherein the upper case comprises a top plate, the top plate has an edge extending outwardly to form a sidewall, and the top plate, the sidewall and the bottom plate are fastened to form the placement cavity;
preferably, a heat dissipation plate is arranged between the top plate and the cell stacking body;
preferably, a heat conducting glue layer is arranged between the heat dissipation plate and the cell stacking body;
preferably, the battery pack further comprises a battery management device, a low-voltage plug-in, a high-voltage plug-in and a battery power distribution device, wherein a plug-in panel is arranged on the upper box body and/or the lower box body, and the battery management device, the low-voltage plug-in, the high-voltage plug-in and the battery power distribution device are electrically connected with the battery cell stacking body and are integrally arranged on the plug-in panel.
9. A method of exhausting a battery pack according to any one of claims 6 to 8, comprising:
and blasting exhaust gas generated by the battery cell stacking body enters the confluence cavity through the confluence port and is blasted and discharged from the bottom of the lower box body through the blasting valve.
10. An electrically powered device, characterized in that it comprises at least one battery pack according to any one of claims 6-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210857699.8A CN115149176B (en) | 2022-07-20 | 2022-07-20 | Lower box body, battery pack, exhaust method and electric device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210857699.8A CN115149176B (en) | 2022-07-20 | 2022-07-20 | Lower box body, battery pack, exhaust method and electric device |
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| Publication Number | Publication Date |
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| CN115149176A true CN115149176A (en) | 2022-10-04 |
| CN115149176B CN115149176B (en) | 2023-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210857699.8A Active CN115149176B (en) | 2022-07-20 | 2022-07-20 | Lower box body, battery pack, exhaust method and electric device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117080673A (en) * | 2023-10-17 | 2023-11-17 | 厦门海辰储能科技股份有限公司 | Battery module and power utilization device |
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| CN111446397A (en) * | 2020-04-26 | 2020-07-24 | 天津市捷威动力工业有限公司 | Battery pack box and battery pack |
| CN111668409A (en) * | 2019-03-08 | 2020-09-15 | 比亚迪股份有限公司 | Battery tray, power battery package and vehicle |
| CN112531246A (en) * | 2019-08-31 | 2021-03-19 | 比亚迪股份有限公司 | Battery tray, power battery package and vehicle |
| CN215771430U (en) * | 2021-12-06 | 2022-02-08 | 比亚迪股份有限公司 | Battery pack and vehicle with same |
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| CN111668409A (en) * | 2019-03-08 | 2020-09-15 | 比亚迪股份有限公司 | Battery tray, power battery package and vehicle |
| CN209401662U (en) * | 2019-03-28 | 2019-09-17 | 宁德时代新能源科技股份有限公司 | Battery pack |
| CN112531246A (en) * | 2019-08-31 | 2021-03-19 | 比亚迪股份有限公司 | Battery tray, power battery package and vehicle |
| CN111446397A (en) * | 2020-04-26 | 2020-07-24 | 天津市捷威动力工业有限公司 | Battery pack box and battery pack |
| CN215771430U (en) * | 2021-12-06 | 2022-02-08 | 比亚迪股份有限公司 | Battery pack and vehicle with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117080673A (en) * | 2023-10-17 | 2023-11-17 | 厦门海辰储能科技股份有限公司 | Battery module and power utilization device |
| CN117080673B (en) * | 2023-10-17 | 2024-01-26 | 厦门海辰储能科技股份有限公司 | Battery module and power utilization device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115149176B (en) | 2023-07-07 |
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