CN116169411A - Battery and vehicle with same - Google Patents
Battery and vehicle with same Download PDFInfo
- Publication number
- CN116169411A CN116169411A CN202111407565.8A CN202111407565A CN116169411A CN 116169411 A CN116169411 A CN 116169411A CN 202111407565 A CN202111407565 A CN 202111407565A CN 116169411 A CN116169411 A CN 116169411A
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- China
- Prior art keywords
- battery
- cover plate
- air inlet
- glue
- channel
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- 239000003292 glue Substances 0.000 claims abstract description 83
- 239000000565 sealant Substances 0.000 claims abstract description 48
- 238000000605 extraction Methods 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 210000004027 cell Anatomy 0.000 claims description 121
- 230000001681 protective effect Effects 0.000 claims description 19
- 230000000712 assembly Effects 0.000 claims description 18
- 238000000429 assembly Methods 0.000 claims description 18
- 210000005056 cell body Anatomy 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 238000004382 potting Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 4
- 210000003850 cellular structure Anatomy 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 17
- 238000002347 injection Methods 0.000 abstract 5
- 239000007924 injection Substances 0.000 abstract 5
- 238000005192 partition Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
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
- H01M50/244—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
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
-
- 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
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
-
- 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
-
- 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
Landscapes
- 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 discloses a battery and a vehicle with the same, the battery comprises: the shell comprises a shell body, a first cover plate and a second cover plate, wherein an air extraction opening is formed in the first cover plate, an air inlet and a glue injection opening are formed in the second cover plate at intervals, the battery cell assembly comprises a first surface and a second surface, an air inlet channel is defined between the first surface and the inner surface of the shell, a glue injection channel is defined between the second surface and the inner surface of the shell, two ends of the air inlet channel are respectively communicated with the air inlet and the air extraction opening, two ends of the glue injection channel are respectively communicated with the glue injection opening and the air extraction opening, and the air inlet channel and the glue injection channel are mutually independent when glue is injected. According to the battery provided by the invention, the pouring sealant can fill the glue pouring channel so as to realize the fixed sealing of the inside of the battery. Meanwhile, through the arrangement of the air inlet channel communicated with the air inlet and the air extraction opening, the negative pressure in the air inlet channel is small, so that the fixing effect of the pouring sealant is ensured, and meanwhile, the cost can be reduced.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery and a vehicle with the battery.
Background
In the related art, components such as a battery core assembly are arranged in the battery, and the battery core assembly needs to be fixed in the battery. However, if a complex mounting structure is provided in the battery, the space is occupied, the assembly mode is complex, and if the battery is affected by vibration or the like, looseness is likely to occur, so that the safety performance of the battery is affected. Therefore, some batteries are fixedly mounted by pouring sealant into the battery, but the pouring sealant has high fluidity before solidification, and if the pouring sealant flows to other positions, the safety performance of the battery is affected, and the cost is increased.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a battery which is easy to realize a miniaturized design, has high safety performance, and is low in cost.
The invention further provides a vehicle, which comprises the battery.
A battery according to an embodiment of the present invention includes: the battery cell comprises a shell and a battery cell assembly, wherein the shell comprises a shell body, a first cover plate and a second cover plate which are opposite to each other along the length direction of the shell body, the first cover plate and the second cover plate are enclosed to form a sealed accommodating space, an air extraction opening is formed in the first cover plate, and an air inlet and a glue filling opening which are arranged at intervals are formed in the second cover plate; the battery cell assembly is arranged in the accommodating space, the battery cell assembly comprises a first surface and a second surface which are opposite to each other along the width direction of the shell body, an air inlet channel is defined between the first surface and the inner surface of the shell body, a glue filling channel is defined between the second surface and the inner surface of the shell body, two ends of the air inlet channel are respectively communicated with the air inlet and the air extraction opening, two ends of the glue filling channel are respectively communicated with the glue filling opening and the air extraction opening, pouring sealant is suitable for entering the glue filling channel through the glue filling opening, during glue filling, the pressure in the air inlet channel is higher than the pressure in the glue filling channel, and the pressure in the glue filling channel is lower than the pressure outside the shell.
According to the battery provided by the embodiment of the invention, through arranging the glue filling channel communicated with the glue filling opening and the air extraction opening, negative pressure is extracted at the air extraction opening, and the pouring sealant entering from the glue filling opening can fill the glue filling channel so as to fix and seal the inside of the battery, and the battery can be positioned quickly, so that automatic glue filling is easy to realize. Meanwhile, through the arrangement of the air inlet channel communicated with the air inlet and the air extraction opening, when negative pressure is extracted, the negative pressure in the air inlet channel is very small, so that the cost can be reduced while the fixing effect of pouring sealant is ensured.
In some embodiments, the battery further comprises a seal having a gap between the cell assembly and the second cover plate, the seal being disposed within the gap and separating the gap into a first gap and a second gap, the cell assembly and the first cover plate having a third gap therebetween; the glue filling channel is communicated with the glue filling opening through the first gap and is communicated with the air extraction opening through the third gap, and the air inlet channel is communicated with the air inlet through the second gap and is communicated with the air extraction opening through the third gap.
In some embodiments, the cell assembly further comprises: a cell body; the insulating cover is positioned between the battery cell body and the second cover plate, and the sealing piece is clamped between the insulating cover and the battery cell assembly.
In some embodiments, the cell assembly further comprises: and the protective film is coated on the outer peripheral side of the battery cell body, and at least one through hole is formed on the surface of one side of the protective film facing the second surface.
In some embodiments, the glue filling port and the air extraction port are opposite to each other in the length direction of the shell.
In some embodiments, the housing has a height D 1 The shell is provided with two outer surfaces which are opposite in the height direction, and the distance between the outer surface adjacent to the glue filling channel and the center of the glue filling port in the two outer surfaces is D 2 The D is 1 Said D 2 The relation is satisfied: d is less than or equal to 10mm 2 ≤0.25D 1 。
In some embodiments, the distance between the outer surface of the two outer surfaces adjacent to the glue-pouring channel and the center of the air inlet is D 3 The D is 2 Said D 3 The relation is satisfied: d (D) 2 +18mm≤D 3 ≤D 2 +22mm。
In some embodiments, the height of the pouring sealant in the height direction of the shell is D 4 The D is 4 The method meets the following conditions: d is more than or equal to 0.8mm 4 ≤1.5mm。
In some embodiments, the cell assembly comprises: the battery cell strings are arranged side by side along the thickness direction of the shell body and are connected in series with each other; the first series connection piece is arranged at one end of the battery cell string, and the first series connection piece is connected with two adjacent battery cell strings in series.
In some embodiments, each of the cell strings comprises: the plurality of sub-battery cell assemblies are sequentially arranged along the length direction of the shell body and are connected in series with each other; and a plurality of second series connection pieces, wherein each second series connection piece is connected with two adjacent sub-cell assemblies in series.
In some embodiments, each of the sub-cell assemblies comprises: the battery cores are arranged side by side along the thickness direction of the shell body and are connected in parallel with each other; and each parallel connection sheet is connected with two adjacent sub-cells in parallel.
In some embodiments, the distance between the outer surface of the cell assembly and the inner surface of the first cover plate is D 5 The D is 5 The relation is satisfied: d is more than or equal to 0.8mm 5 Less than or equal to 1mm; and/or the number of the groups of groups,
the distance between the outer surface of the battery cell component and the inner surface of the second cover plate is D 6 The D is 6 The relation is satisfied: d is more than or equal to 0.8mm 6 ≤1mm。
In some embodiments, the pressure within the glue-pouring channel is P, which satisfies the relation: -75kpa less than or equal to P less than or equal to-60 kpa.
A vehicle according to an embodiment of the invention comprises a battery according to any of the embodiments described above.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic view of a structure of a battery according to an embodiment of the present invention;
fig. 2 is an exploded view of a battery according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a protective film, a first cover plate according to an embodiment of the present invention;
fig. 4 is an enlarged view at a according to fig. 3;
fig. 5 is a schematic structural view of a protective film, a second cover plate of a battery according to an embodiment of the present invention;
fig. 6 is an enlarged view at B according to fig. 5;
fig. 7 is a cross-sectional view of a battery according to an embodiment of the present invention;
fig. 8 is an enlarged view at C according to fig. 7;
fig. 9 is an enlarged view according to fig. 7 at D;
fig. 10 is a schematic structural view of a cell assembly according to an embodiment of the present invention;
FIG. 11 is a partial block diagram of a cell assembly according to an embodiment of the present invention;
fig. 12 is an exploded view of a subcell assembly according to an embodiment of the invention.
Reference numerals:
a battery 100;
a housing 10; a first cover plate 11; an extraction opening 111; a positive electrode output 112; a negative electrode output 113; a low voltage sample output 114;
a second cover plate 12; an air inlet 121; a glue filling port 122; a groove 123; a case body 13; a housing space 14; an outer surface 15;
a cell assembly 20; a first surface 21; a second surface 22; a third surface 23; a cell body 20a;
a cell string 24; a sub-cell assembly 24a; a cell 241;
a first cell 2411; a first positive electrode 2411a; a second cell 2412; a second positive electrode 2412a;
a third cell 2413; a first negative electrode 2413a; a fourth cell 2414; and a second negative electrode 2414a.
A mounting bracket 25; a plug groove 251;
a parallel connection tab 27; a first series connection tab 281; a second series connection tab 282; a partition 29; a plug portion 291;
an intake passage 30; a glue-pouring channel 40; a seal 50; an insulating cover 60; a protrusion 61;
a protective film 70; a through hole 71; a sub-via 711; pouring sealant 80;
a gap 91; a first gap 92; a second gap 93; and a third gap 94.
Detailed Description
Embodiments of the present invention will be described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary, and a battery 100 according to an embodiment of the present invention will be described below with reference to fig. 1 to 12, the battery 100 including a case 10 and a cell assembly 20. In the following examples of the present application, the longitudinal direction refers to the top-bottom direction as shown in fig. 2, the width direction refers to the front-back direction as shown in fig. 2, and the thickness direction refers to the left-right direction as shown in fig. 2, which are only schematically illustrated.
Specifically, as shown in fig. 1 to 9, the case 10 includes a case body 13 and first and second cover plates 11 and 12 opposite to each other in a length direction of the case body 13. For example, the first cover plate 11 and the second cover plate 12 may be located at both ends of the cell assembly 20 in the length direction (e.g., in the top-bottom direction as shown in fig. 1), respectively. As shown in fig. 2, the first cover plate 11 may be provided with a positive output 112, a negative output 113, and a low-voltage sampling output 114. The housing body 13, the first cover plate 11, and the second cover plate 12 enclose a sealed accommodating space 14.
The first cover plate 11 is provided with an air extraction opening 111, and the second cover plate 12 is provided with an air inlet 121 and a glue filling opening 122 which are arranged at intervals. The battery cell assembly 20 is disposed in the receiving space 14, and the battery cell assembly 20 includes a first surface 21 and a second surface 22 opposite to each other in a width direction of the case body 13 (e.g., a front-rear direction as shown in fig. 2), with an air intake passage 30 defined between the first surface 21 and an inner surface of the case body 13. A glue filling channel 40 is defined between the second surface 22 and the inner surface of the shell body 13, two ends of the air inlet channel 30 are respectively communicated with the air inlet 121 and the air extraction opening 111, two ends of the glue filling channel 40 are respectively communicated with the glue filling opening 122 and the air extraction opening 111, wherein the air extraction opening 111, the air inlet 121 and the glue filling opening 122 are respectively communicated with the outside of the shell, and the pouring sealant 80 is suitable for entering the glue filling channel 40 through the glue filling opening 122. In the glue filling process, the air inlet channel 30 and the glue filling channel 40 are independent from each other. In the case of glue filling, the pressure in the air inlet channel 30 is higher than the pressure in the glue filling channel 40, and the pressure in the glue filling channel 40 is lower than the pressure outside the casing 10. That is, when the potting adhesive is filled, the potting adhesive 80 can be filled in the potting adhesive channel 40, and the potting adhesive 80 does not enter the air inlet channel 30, and the potting adhesive 80 can fix a plurality of components in the battery 100 after being solidified by filling the potting adhesive 80 into the potting adhesive channel 40, so as to ensure the structural reliability of the battery 100.
The cell assembly 20 may include a third surface 23 and a fourth surface (not shown) disposed opposite to each other in a thickness direction (e.g., a left-right direction as viewed in fig. 2), the third surface 23 having an area larger than an area of the first surface and an area of the third surface 23 larger than an area of the second surface, and the fourth surface having an area larger than an area of the first surface and an area of the fourth surface larger than an area of the second surface. By the arrangement, the pouring sealant 80 can be prevented from flowing to the third surface 23 and the fourth surface, and the third surface 23 and the fourth surface are the main expansion surfaces of the battery 100, so that the safety performance of the battery 100 can be guaranteed, and meanwhile, the cost can be reduced.
Negative pressure is drawn at the suction port 111 to generate negative pressure in the glue-pouring passage 40, where "negative pressure" is a gas pressure state lower than normal pressure. Pouring sealant 80 is poured into the shell 10 at the sealant pouring opening 122, and the pouring sealant 80 can move from one end of the sealant pouring channel 40 communicated with the sealant pouring opening 122 to one end of the sealant pouring channel 40 communicated with the air extraction opening 111 by the adsorption force of negative pressure, so that the pouring sealant 80 can fill the sealant pouring channel 40. The pouring sealant 80 is filled in the sealant filling channel 40 in a negative pressure pumping mode, so that on one hand, the sealant filling efficiency can be improved, and on the other hand, the flow uniformity of the pouring sealant 80 can be guaranteed to be good.
When negative pressure is pumped at the air suction opening 111, because the two ends of the air inlet channel 30 are respectively communicated with the air inlet 121 and the air suction opening 111, the negative pressure in the air inlet channel 30 can be small, and then the pouring sealant 80 in the glue pouring channel 40 can be prevented from flowing into the air inlet channel 30, and meanwhile, when glue is poured, the shell body 13 can be pressed, so that the third surface 23 and the fourth surface of the shell body 13 opposite to the battery cell assembly 20 in the thickness direction are tightly attached, and the pouring sealant 80 in the glue pouring channel 40 is further prevented from flowing into the air inlet channel 30.
According to the battery 100 provided by the embodiment of the invention, through the arrangement of the glue filling channel 40 communicated with the glue filling opening 122 and the air extraction opening 111, negative pressure is extracted at the air extraction opening 111, the pouring sealant 80 entering from the glue filling opening 122 can fill the glue filling channel 40, the fixation and the sealing of the inside of the battery 100 can be realized, the quick positioning can be realized, and the automatic glue filling is easy to realize. Meanwhile, by arranging the air inlet channel 30 communicated with the air inlet 121 and the air extraction opening 111, when negative pressure is extracted, the pressure in the air inlet channel 30 is small, so that the pouring sealant 80 in the glue pouring channel 40 is prevented from flowing into the air inlet channel 30, and the cost can be reduced while the fixing effect of the pouring sealant 80 is ensured.
In some embodiments, as shown in fig. 7, the air inlet 121 is located on a side of the glue inlet 122 adjacent to the first surface 21, and both the glue inlet 122 and the air extraction opening 111 are located adjacent to the second surface 22. Thus, the processing and punching can be facilitated, and meanwhile, the fluidity of the pouring sealant 80 in the glue pouring process can be guaranteed to be good.
According to some embodiments of the present invention, referring to fig. 2 in combination with fig. 7 and 8, the battery 100 further includes a sealing member 50 having a gap 91 between the cell assembly 20 and the second cover plate 12, the sealing member 50 being disposed in the gap 91 and dividing the gap 91 into a first gap 92 and a second gap 93, and a third gap 94 between the cell assembly 20 and the first cover plate 11. The glue-pouring passage 40 communicates with the glue-pouring opening 122 through the first gap 92 and communicates with the air-extracting opening 111 through the third gap 94, and the air-intake passage 30 communicates with the air-intake opening 121 through the second gap 93 and communicates with the air-extracting opening 111 through the third gap 94. The seal 50 may divide the gap 91 into a first gap 92 and a second gap 93 such that the seal 50 may block the air inlet channel 30 and the glue channel 40, the seal 50 being located between the air inlet 121 and the glue inlet 122. By providing the sealing member 50, the pouring sealant 80 can be prevented from flowing into the air intake passage 30, and thus the ventilation effect of the air intake passage 30 can be ensured.
In some examples, as shown in fig. 2 and 8, the battery cell assembly 20 further includes a battery cell body 20a and an insulating cover 60, the battery cell body 20a being operable to store electrical energy. The insulating cover 60 is located between the cell body 20a and the second cover plate 12. By providing the insulating cover 60, the housing 10 and the battery cell assembly 20 can be insulated, so that the safety performance of the battery 100 is improved, and the battery 100 is more reliable and safe. The sealing member 50 may be interposed between the insulating cover 60 and the battery cell assembly 20, for example, the insulating cover 60 is provided with a protrusion 61 protruding toward the sealing member 50, a groove 123 may be defined between the circumferential wall of the air inlet 121 and the glue-pouring opening 122 facing each other, and the inner surface of the second cover plate 12, one side of the sealing member 50 may be fitted into the groove 123, and the other side may be abutted against the protrusion 61, thereby improving the sealing effect of the sealing member 50 and facilitating positioning.
Further, the seal 50 may be a foam. The sealing member 50 made of foam material has good elasticity and good compressibility, so that the sealing member has good bonding performance with the insulating cover 60 and the second cover plate 12, and further, the sealing effect on the glue filling channel 40 and the air inlet channel 30 can be ensured. For example, foam may be preloaded between the insulating cover 60 and the second cover plate 12 to facilitate assembly, while foam may be effectively compressed to further enhance the sealing effect. When the battery 100 is disturbed by external factors such as vibration, the sealing member 50 may absorb the vibration to ensure that the sealing effect is not affected.
According to some embodiments of the present invention, as shown in fig. 3, the cell assembly 20 may further include a protective film 70, and the protective film 70 is coated on the outer circumferential side of the cell body 20a. The protective film 70 can protect the cell body 20a from external corrosion and the outer surface of the cell body 20a from scratch. At least one through hole 71 is formed on a side surface of the protective film 70 facing the glue-pouring passage 40. Through setting up the through-hole 71, can make the pouring sealant 80 flow to the electric core body 20a from the through-hole 71, when the protection film 70 can play the guard action to electric core subassembly 20, can do benefit to the fixed mounting effect of improvement pouring sealant 80 to electric core subassembly 20.
Further, referring to fig. 3 to 5, the through holes 71 may be plural, and the plural through holes 71 are disposed at intervals along the length direction of the battery cell assembly 20, for example, the battery cell assembly 20 may include plural sub-battery cells disposed at intervals along the length direction of the battery cell assembly 20, and the plural through holes 71 are disposed corresponding to the plural sub-battery cells, so that the protection effect of the protection film 70 can be ensured while the fixing effect of the potting adhesive 80 on the battery cell assembly 20 is ensured.
Still further, referring to fig. 3-6, the via 71 includes a plurality of sub-vias 711 arranged at intervals. Therefore, the opening area of the single sub-through hole 711 can be reduced, the structural strength of the protective film 70 can be improved while the full contact between the battery cell assembly 20 and the pouring sealant 80 is ensured, the protective film 70 is prevented from being separated from the battery cell assembly 20, and the battery 100 is more stable and reliable.
In some embodiments, as shown in fig. 2, the glue-pouring opening 122 and the air-extracting opening 111 are opposite to each other in the length direction. Thus, the equipment devices can be positioned at the same height, so that the installation and operation of operators are facilitated, and the production efficiency of the battery 100 is improved.
In some embodiments, as shown in fig. 7 and 8, the height of the housing 10 is D 1 The housing 10 has two outer surfaces 15 opposite to each other in the height direction, and the distance D between the outer surface 15 adjacent to the glue-pouring channel 40 and the center of the glue-pouring opening 122 is the distance D between the two outer surfaces 15 2 ，D 1 、D 2 The relation is satisfied: d is less than or equal to 10mm 2 ≤0.25D 1 . For example, D 1 ＝100mm,D 2 =20mm. In combination with FIG. 8, D 1 D is the height of the housing 10 in the up-down direction 2 Is the distance between the central axis of the glue-pouring spout 122 and the lower surface of the housing. Thereby, by controlling the outer surface 15 and the glue-pouring opening122 to make the cell assembly 20 can be installed with the casing 10 and guarantee under the condition of internal structure intensity, reduce the use of pouring sealant 80, so that the distance between casing 10 and first surface 21 is reasonable, guarantee the encapsulating effect. Meanwhile, the miniaturization design of the battery 100 can be facilitated, and the cost can be reduced.
In some embodiments, as shown in FIG. 3, the distance between the outer surface 15 of the two outer surfaces 15 adjacent the glue-pouring channel 40 and the center of the air inlet 121 is D 3 ，D 2 、D 3 The relation is satisfied: d (D) 2 +18mm≤D 3 ≤D 2 +22mm. The second cover plate 12 is provided with an explosion-proof valve, and the air inlet 121 is positioned between the glue filling port 122 and the explosion-proof valve. For example, D 2 ＝20mm,D 3 =40 mm. Therefore, the distance between the outer surface 15 of the casing 10 and the center of the air inlet 121 is further reasonable, so that the distance between the air inlet 121 and the glue filling opening 122 and the distance between the air inlet 121 and the casing 10 are set more reasonably, the air inlet 121 is prevented from being sealed by the pouring sealant 80, the risk of failure caused by blockage of the explosion-proof valve is reduced, and the use safety of the battery 100 can be improved.
In some embodiments, as shown in fig. 7 and 8, the height of the pouring sealant 80 in the height direction of the housing 10 is D 4 ，D 4 The method meets the following conditions: d is more than or equal to 0.8mm 4 Less than or equal to 1.5mm. For example, D 4 =1mm. Due to the resistance in the pouring channel 40, the thickness of the glue layer formed by the pouring sealant 80 is different in the vertical direction of the shell, wherein D 4 Refers to the maximum height of the glue line, i.e., the thickness of the glue line 80 after it has fully filled the glue-pouring channel 40. Thereby, the height of the pouring sealant 80 in the height direction of the housing 10 is controlled, so that the structural strength and the sealing property of the pouring sealant 80 filled in the pouring sealant channel 40 can be ensured, and the use of the pouring sealant 80 is reduced.
In some embodiments, as shown in fig. 9 and 10, the battery cell assembly 20 includes a plurality of battery cell strings 24 and a first serial connection sheet 281, the plurality of battery cell strings 24 are arranged side by side along the thickness direction of the housing body 13 and the plurality of battery cell strings 24 are connected in series with each other, the first serial connection sheet 281 is arranged at one end of the battery cell strings 24, and the first serial connection sheet 281 is connected in series with two adjacent battery cell strings 24. Thus, while the miniaturization design is facilitated, the capacity and voltage of the battery 100 can be advantageously increased. A plurality of series-connected cell strings 24 may construct the cell body 20a.
Further, as shown in fig. 11, each cell string 24 includes a plurality of sub-cell assemblies 24a and a plurality of second series connection pieces 282, the sub-cell assemblies 24a are sequentially arranged along the length direction of the housing 10 and are connected in series with each other, and each second series connection piece 282 is connected in series with two adjacent sub-cell assemblies 24a to further increase the capacity and voltage of the battery 100. For example, as shown in fig. 9, the number of the sub-battery cell assemblies 24a of each battery cell string 24 may be four, and after the four sub-battery cell assemblies 24a are connected in series, a high-voltage and high-capacity blade battery may be formed, and the utilization ratio of the four sub-battery cell assemblies 24a in the length direction in the battery 100 may reach more than 98%. The installation mode is simple and reliable, and the grouping efficiency is high. Of course, the number of the sub-battery cell assemblies 24a can be arbitrary, each sub-battery cell assembly 24a can be arbitrarily connected in series to form blade batteries with different sizes, different capacities and different voltages, and a user can specifically set the blade batteries according to actual requirements, so that the applicability of the batteries is improved. Each sub-cell assembly 24a is highly reproducible, facilitating the arrangement and standardized design of different blade cells, and facilitating the formation of higher battery packs.
In some embodiments, as shown in fig. 11 and 12, each sub-cell assembly 24a includes a plurality of cells 241 and a plurality of parallel connection pieces 27, the plurality of cells 241 are arranged side by side in the thickness direction of the case body 13 and each cell 241 is connected in parallel with each other, and each parallel connection piece 27 connects two adjacent cells 241 in parallel. The battery cell 241 may be a soft package battery cell or a bare battery cell. By this arrangement, the capacity and voltage of the battery can be further improved. The second series connection tab 282 may be welded to the parallel connection tab 27 to ensure the parallel connection of the cells 241 of each sub-cell assembly 24a, the series connection reliability of the sub-cell assemblies 24a of each cell string 24. Two ends of each cell 241 may correspond to one parallel connection sheet 27, and two cells 241 of each sub-cell assembly 24a arranged side by side may correspond to two parallel connection sheets 27, so as to ensure the stability of parallel connection.
For example, each of the sub-cell assemblies 24a includes two cells 241, i.e., the two cell strings 24 may include a plurality of sub-cell assemblies 24a, for example, one of the cell strings 24 may include a first sub-cell assembly and the other cell string 24 may include a second sub-cell assembly, the first sub-cell assembly and the second sub-cell assembly may be arranged side by side along the length direction of the housing 10, the first sub-cell assembly may include two cells 241 and may be the first cell 2411 and the second cell 2412, respectively, and the first positive electrode 2411a of the first cell 2411 and the second positive electrode 2412a of the second cell 2412 are located on the same side and connected in parallel. The second sub-cell assembly may include two cells 241 and be a third cell 2413 and a fourth cell 2414, respectively, where a first negative electrode 2413a of the third cell 2413 and a second negative electrode 2414a of the fourth cell 2414 are located on the same side and connected in parallel, and a first positive electrode 2411a of the first cell 2411, a second positive electrode 2412a of the second cell 2412, a first negative electrode 2413a of the third cell 2413, and a second negative electrode 2414a of the fourth cell 2414 are all located on the same side, so as to achieve serial connection of a plurality of cell strings 24. The first positive electrode 2411a, the second positive electrode 2412a, the first negative electrode 2413a, and the second negative electrode 2414a may be configured as tabs, and the tabs may be bent and connected to the corresponding parallel connection tabs 27.
In some examples, the cell assembly further comprises at least one spacer 29, the spacer 29 being disposed between two adjacent said cell strings and extending in the same direction as the cell strings 24. The spacer 29 may provide support to facilitate reducing vibration and shock of the cell assembly 20. In addition, the partition 29 may be a heat conducting member, for example, the partition 29 may be an aluminum plate, so that heat can be conveniently transferred to the casing 10, so that heat of the battery cell in the middle is conveniently transferred to the casing, and the heat conducting efficiency is high, so that the temperature can be reduced.
In some embodiments, as shown in fig. 10-12, the cell assembly 20 includes: the installation support 25 is located at two ends of the partition 29, a plug groove 251 is formed on one of the installation support 25 and the partition 29, a plug portion 291 is arranged on the other of the installation support 25 and the partition 29, and the plug portion 291 is matched in the plug groove 251. Thus, the cell strings 24 can be mounted and fixed by the mounting brackets 25, so as to ensure the mounting reliability of the cell strings 24.
For example, the number of mounting brackets 25 may be plural, two mounting brackets 25 are disposed between two adjacent sub-cell assemblies 24a, the number of separators 29 may be plural, the plurality of separators 29 are disposed corresponding to the plurality of sub-cell assemblies 24a, the two ends of the plurality of separators 29 are respectively provided with a plugging portion 291, and the plugging portions 291 of the plurality of separators 29 are correspondingly plugged in the corresponding plugging slots 251.
According to some embodiments of the present invention, the cell assembly 20 includes a third surface 23 and a fourth surface (not shown) opposite to each other in the thickness direction, and at least an outer periphery of the fourth surface and at least an outer periphery of the third surface 23 are closely adhered to the case body 13 when the glue is applied. Therefore, the pouring sealant 80 can be prevented from flowing onto the third surface 23 and the fourth surface, when the pouring sealant is poured, the third surface 23 and the fourth surface can be clamped with the shell body 13 in a pressing mode or the like, interference can not be generated on the air inlet channel 30 and the glue pouring channel 40, the glue pouring channel 40 and the air inlet channel 30 can be independent of each other while the close fitting effect between the third surface 23 and the shell body 13 is ensured, and the safety performance of the battery 100 is improved.
For example, the first surface 21 may be configured for a surface of the protective film 70 facing one side of the case body 13 (e.g., a front side as shown in fig. 2, 7), and the second surface 22 may be configured for a surface of the protective film 70 facing the other side of the case body 13 (e.g., a rear side as shown in fig. 2, 7), that is, the first surface 21 and the second surface 22 are opposite surfaces of the protective film 70 in the height direction of the case body 13 (or the height direction of the battery 100). The third surface 23 may be configured for one side surface (e.g., the right side as shown in fig. 2) of the protective film 70 facing the case body 13, and the fourth surface may be configured for the other side surface (e.g., the left side as shown in fig. 2) of the protective film 70 facing the case body 13, that is, the third surface 23 and the fourth surface are two surfaces of the protective film 70 opposite in the thickness direction of the case body 13 (or the thickness direction of the battery 100). The flatness of the outer surface of the battery cell assembly 20 can be improved by the arrangement, so that the close fitting effect of the third surface 23 and the shell body 13 and the close fitting effect of the fourth surface and the shell body 13 can be ensured.
In some embodiments, as shown in fig. 8, the distance between the outer surface of the cell assembly 20 and the inner surface of the first cover plate 11 is D 5 ，D 5 The relation is satisfied: d is more than or equal to 0.8mm 5 Is less than or equal to 1mm. Thus, the efficiency of negative pressure suction and the fluidity of the potting adhesive 80 can be ensured while facilitating the reduction of the size of the battery 100 in the top-bottom direction. And/or the distance between the outer surface of the cell assembly 20 and the inner surface of the second cover plate 12 is D 6 ，D 6 The relation is satisfied: d is more than or equal to 0.8mm 6 Is less than or equal to 1mm. Thus, the efficiency of air intake from the air intake port 121 and the dispensing efficiency at the time of dispensing from the dispensing port 122 can be ensured while facilitating the reduction of the size of the battery 100 in the top-bottom direction. For example, the distance between the cell assembly 20 and the first cover plate 11 and the distance between the cell assembly 20 and the second cover plate 12 are all 0.8mm to 1mm. D (D) 5 ＝D 6 =0.9 mm. Therefore, the length occupation ratio of the battery cell assembly 20 and the first cover plate 11 and the length occupation ratio of the battery cell assembly 20 and the first cover plate 11 in the top-bottom direction is only 1%, and the occupied space is small.
According to some embodiments of the present invention, the pressure within the glue-pouring channel 40 ranges from a pressure within the range P, P satisfying the relationship: -75kpa less than or equal to P less than or equal to-60 kpa. The range of the negative pressure value set in this way is reasonable, so that the flow efficiency of the pouring sealant 80 can be improved, and the miniaturization design of the battery 100 can be considered, and the cost can be reduced. It should be noted that, when the distance between the housing body 13 and the second surface 22 is designed to be larger, the negative pressure value can be set to be lower, and at this time, the thickness of the potting adhesive 80 between the housing body 13 and the second surface 22 is correspondingly increased, so as to ensure the fixing effect. Therefore, the distance between the shell body 13 and the second surface 22 and the pressure value of the negative pressure value in the glue pouring channel 40 are reasonably set, and both low cost and fixing reliability can be achieved.
For example, the battery 100 may be a blade battery, the blade battery may be a plate-shaped battery, the length of the blade battery (for example, top-bottom direction as shown in fig. 1) is long, the fixation of the inside of the battery 100 is achieved through the glue filling mode, and the glue filling channel 40 extends along the length direction of the blade battery, so that the fixation effect can be improved, and the safety performance of the battery 100 is ensured.
A vehicle according to an embodiment of the invention includes the battery 100 of any one of the embodiments described above. For example, the vehicle may be an electric vehicle or a hybrid vehicle. According to the vehicle provided by the embodiment of the invention, through the arrangement of the glue filling channel 40 communicated with the glue filling opening 122 and the air extraction opening 111, negative pressure is extracted at the air extraction opening 111, and the pouring sealant 80 entering from the glue filling opening 122 can fill the glue filling channel 40 so as to fix and seal the inside of the battery 100, and the vehicle can be positioned quickly, so that automatic glue filling is easy to realize. Meanwhile, by providing the air intake passage 30 in communication with the air intake port 121 and the air extraction port 111, when negative pressure is extracted, the negative pressure in the air intake passage 30 is small to prevent the potting adhesive 80 in the potting adhesive passage 40 from flowing to the air intake passage 30, whereby the safety performance of the battery 100 can be improved.
In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the invention, a "first feature" or "second feature" may include one or more of such features. In the description of the present invention, "plurality" means two or more. In the description of the invention, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween. In the description of the invention, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (15)
1. A battery, comprising:
the shell comprises a shell body, a first cover plate and a second cover plate, wherein the first cover plate and the second cover plate are opposite to each other along the length direction of the shell body, the first cover plate and the second cover plate are enclosed to form a sealed accommodating space, an air extraction opening is formed in the first cover plate, and an air inlet and a glue filling opening which are arranged at intervals are formed in the second cover plate;
the battery cell assembly is arranged in the accommodating space, the battery cell assembly comprises a first surface and a second surface which are opposite to each other along the width direction of the shell body, an air inlet channel is defined between the first surface and the inner surface of the shell body, a glue filling channel is defined between the second surface and the inner surface of the shell body, two ends of the air inlet channel are respectively communicated with the air inlet and the air extraction opening, two ends of the glue filling channel are respectively communicated with the glue filling opening and the air extraction opening, pouring sealant is suitable for entering the glue filling channel through the glue filling opening, and when the pouring sealant is filled, the pressure intensity in the air inlet channel is higher than the pressure intensity in the glue filling channel, and the pressure intensity in the glue filling channel is lower than the pressure intensity outside the shell.
2. The battery of claim 1, wherein the air inlet is located on a side of the glue-pouring port adjacent to the first surface, and wherein the glue-pouring port and the air extraction port are both disposed adjacent to the second surface.
3. The battery of claim 1, further comprising a seal having a gap between the cell assembly and the second cover plate, the seal disposed within the gap and separating the gap into a first gap and a second gap, the cell assembly and the first cover plate having a third gap therebetween; the glue filling channel is communicated with the glue filling opening through the first gap and is communicated with the air extraction opening through the third gap, and the air inlet channel is communicated with the air inlet through the second gap and is communicated with the air extraction opening through the third gap.
4. The battery of claim 1, wherein the cell assembly further comprises:
a cell body;
the insulating cover is positioned between the battery cell body and the second cover plate, and the sealing piece is clamped between the insulating cover and the battery cell assembly.
5. The battery of claim 4, wherein the cell assembly further comprises:
and the protective film is coated on the outer peripheral side of the battery cell body, and at least one through hole is formed on the surface of one side of the protective film facing the second surface.
6. The battery according to claim 1, wherein the glue-pouring port and the air-extracting port are opposed to each other in a length direction of the case.
7. The battery of claim 1, wherein the housing has a height D 1 The housing has a height ofTwo outer surfaces opposite in direction, wherein the distance between the outer surface adjacent to the glue filling channel and the center of the glue filling opening in the two outer surfaces is D 2 The D is 1 Said D 2 The relation is satisfied: d is less than or equal to 10mm 2 ≤0.25D 1 。
8. The battery of claim 7, wherein a distance between an outer surface of the two outer surfaces adjacent to the glue-pouring channel and a center of the air inlet is D 3 The D is 2 Said D 3 The relation is satisfied: d (D) 2 +18mm≤D 3 ≤D 2 +22mm。
9. The battery according to claim 1, wherein the potting adhesive has a height D in a height direction of the case 4 The D is 4 The method meets the following conditions: d is more than or equal to 0.8mm 4 ≤1.5mm。
10. The battery of claim 1, wherein the cell assembly comprises:
the battery cell strings are arranged side by side along the thickness direction of the shell body and are connected in series with each other;
the first series connection piece is arranged at one end of the battery cell string, and the first series connection piece is connected with two adjacent battery cell strings in series.
11. The battery of claim 10, wherein each of the cell strings comprises:
the plurality of sub-battery cell assemblies are sequentially arranged along the length direction of the shell body and are connected in series with each other;
and a plurality of second series connection pieces, wherein each second series connection piece is connected with two adjacent sub-cell assemblies in series.
12. The battery of claim 11, wherein each of the sub-cell assemblies comprises:
the battery cores are arranged side by side along the thickness direction of the shell body and are connected in parallel with each other;
and each parallel connection sheet is connected with two adjacent sub-cells in parallel.
13. The battery of claim 1, wherein a distance between an outer surface of the cell assembly and an inner surface of the first cover plate is D 5 The D is 5 The relation is satisfied: d is more than or equal to 0.8mm 5 Less than or equal to 1mm; and/or the number of the groups of groups,
the distance between the outer surface of the battery cell component and the inner surface of the second cover plate is D 6 The D is 6 The relation is satisfied: d is more than or equal to 0.8mm 6 ≤1mm。
14. The battery of claim 1, wherein the pressure in the glue-filled channel is P, the P satisfying the relationship: -75kpa less than or equal to P less than or equal to-60 kpa.
15. A vehicle characterized by comprising a battery according to any one of claims 1-14.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210984839U (en) * | 2020-04-24 | 2020-07-10 | 比亚迪股份有限公司 | Battery pack box, battery pack and electric vehicle |
| DE102020001259A1 (en) * | 2020-02-26 | 2021-08-26 | Daimler Ag | Method for gluing housing parts of a battery |
| WO2021195964A1 (en) * | 2020-03-31 | 2021-10-07 | 东莞新能安科技有限公司 | Battery pack |
| CN113540547A (en) * | 2020-03-31 | 2021-10-22 | 比亚迪股份有限公司 | Encapsulating subassembly and have its battery package, electric motor car |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020001259A1 (en) * | 2020-02-26 | 2021-08-26 | Daimler Ag | Method for gluing housing parts of a battery |
| WO2021195964A1 (en) * | 2020-03-31 | 2021-10-07 | 东莞新能安科技有限公司 | Battery pack |
| CN113540547A (en) * | 2020-03-31 | 2021-10-22 | 比亚迪股份有限公司 | Encapsulating subassembly and have its battery package, electric motor car |
| CN210984839U (en) * | 2020-04-24 | 2020-07-10 | 比亚迪股份有限公司 | Battery pack box, battery pack and electric vehicle |
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