CN115377590A - Battery pack and automobile - Google Patents
Battery pack and automobile Download PDFInfo
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- CN115377590A CN115377590A CN202211100943.2A CN202211100943A CN115377590A CN 115377590 A CN115377590 A CN 115377590A CN 202211100943 A CN202211100943 A CN 202211100943A CN 115377590 A CN115377590 A CN 115377590A
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- battery pack
- battery
- side plate
- liquid cooling
- harness isolation
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- 238000002955 isolation Methods 0.000 claims abstract description 57
- 238000001816 cooling Methods 0.000 claims description 54
- 239000007788 liquid Substances 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 20
- 239000000779 smoke Substances 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000178 monomer Substances 0.000 abstract description 21
- 230000004308 accommodation Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000001965 increasing effect Effects 0.000 description 10
- 238000009434 installation Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000008054 signal transmission Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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- 238000007731 hot pressing Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple 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
- H01M50/249—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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
-
- 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 discloses a battery pack and an automobile, wherein the battery pack comprises an upper shell, a lower shell, a core stack and a wiring harness isolation plate, and the upper shell and the lower shell are mutually covered and jointly enclosed to form an accommodating space. The electric core is piled and is arranged in the accommodation space, and install in on the upper casing, the electric core is piled including a plurality of battery monomer, and is a plurality of battery monomer is according to the formation of predetermined mode syntropy of arranging the electric core is piled. The wire harness isolation plate is located between the electric core stack and the lower shell, and the wire harness isolation plate is fixedly connected to the upper shell. The technical scheme of the invention improves the overall energy density of the battery pack.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a battery pack and an automobile.
Background
In recent years, the appearance of new energy automobiles plays a great role in promoting social development and environmental protection, and a power battery serving as a rechargeable battery is a power source of the new energy automobiles and is widely applied to the field of the new energy automobiles.
Wherein, the battery package is generally fixed in the bottom in car cabin, and for improving the installation intensity of electric core in the battery package, can increase the crossbeam structure in the inside of battery package usually, reduces the holistic energy density of battery package.
Disclosure of Invention
The invention mainly aims to provide a battery pack and aims to improve the overall energy density of the battery pack.
In order to achieve the above object, the present invention provides a battery pack, including:
the upper shell and the lower shell are mutually covered, and the upper shell and the lower shell jointly enclose to form an accommodating space;
the battery core stack is arranged in the accommodating space and is arranged on the upper shell, the battery core stack comprises a plurality of battery monomers, and the battery monomers are arranged in the same direction according to a preset arrangement mode to form the battery core stack; and the number of the first and second groups,
and the wire harness isolation plate is positioned between the electric core stack and the lower shell, and is fixedly connected to the upper shell.
Optionally, a mounting groove is formed in the harness isolation plate, a conductive piece is arranged in the mounting groove, and a pole on the single battery is inserted into the mounting groove and electrically connected with the conductive piece, so that the single battery is electrically connected in a plurality of ways.
Optionally, each single battery faces the end face of the harness isolation plate and is provided with an explosion-proof valve, the harness isolation plate is provided with a smoke exhaust channel, the explosion-proof valve is arranged above the smoke exhaust channel, and the lower shell is provided with a pressure release valve so that generated gas is discharged out of the battery pack when the core stack is out of control due to heat.
Optionally, a gap is provided between the harness insulation panel and the inner surface of the lower case.
Optionally, the wire harness isolation plate is fastened to the upper shell through a first fastener, an installation beam is arranged on one side, facing the cabin, of the upper shell, the installation beam is used for installing the battery pack, one end of the first fastener penetrates through the upper shell to be connected with the installation beam, and the other end of the first fastener is connected with the wire harness isolation plate.
Optionally, a plurality of liquid cooling zones arranged at intervals are arranged in the accommodating space, and the liquid cooling zones are clamped between the plurality of single batteries.
Optionally, the liquid cooling zone includes a first side plate and a second side plate that are arranged oppositely, the first side plate and the second side plate mutually enclose to form a liquid cooling chamber, a plurality of buffer plates are connected between the first side plate and the second side plate, the plurality of buffer plates are arranged at intervals in the liquid cooling chamber, and the buffer plates are arranged in an inclined manner.
Optionally, a limiting convex rib is arranged on the first side plate and/or the second side plate, and the limiting convex rib faces the liquid cooling cavity to limit the limit position of deformation of any one of the first side plate and the second side plate to the other one.
Optionally, at least one side of the battery cell is provided with the liquid cooling belt.
Optionally, the liquid-cooling strip is adhered to the upper shell, and is formed by aluminum alloy through an extrusion process; and/or the presence of a gas in the atmosphere,
the battery unit is bonded or fixed to the upper case by a second fastener.
Optionally, the upper housing is integrally formed; and/or the presence of a gas in the atmosphere,
the lower shell is formed by a thin-wall steel plate or an aluminum alloy through a stamping process or an extrusion process; and/or
The wiring harness isolation plate is integrally formed.
The invention further provides an automobile which comprises an automobile cabin and the battery pack, wherein the battery pack is arranged at the bottom of the automobile cabin.
According to the technical scheme, the upper shell and the lower shell are mutually covered, the upper shell and the lower shell jointly enclose to form the accommodating space, the battery cell stack is arranged in the accommodating space and is arranged on the upper shell, the battery cell stack comprises a plurality of battery monomers, and the battery monomers are arranged in the same direction according to a preset arrangement mode. A wiring harness isolation plate is arranged between the electric core stack and the lower shell, and the wiring harness isolation plate is fixedly connected to the upper shell. The battery cell stack is arranged on the wiring harness isolation plate, so that the wiring harness isolation plate can bear the weight of part of the battery cells while playing a role in bearing the electric and signal transmission among different battery cells, a transverse longitudinal beam is not required to be additionally arranged, the occupied space of the transverse longitudinal beam is reduced, and the integral energy density of the battery pack is improved.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is an exploded view of one embodiment of a battery pack of the present invention;
fig. 2 is an angled cross-sectional view of the battery pack of fig. 1;
fig. 3 is another angular cross-sectional view of the battery pack of fig. 1;
FIG. 4 is a cross-sectional view of the liquid-cooled band in the battery pack of FIG. 1;
fig. 5 is a partial structural schematic diagram of a cell stack in the battery pack in fig. 1;
fig. 6 is a partial structural view of an electrical core stack in another embodiment of a battery pack according to the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
140 | Wiring |
| 110 | |
141 | Mounting groove |
| 111 | |
142 | |
| 120 | |
150 | |
| 121 | |
151 | |
| 130 | |
152 | |
| 131 | Battery monomer | 153 | |
| 132 | |
154 | |
| 133 | Explosion- |
155 | Spacing convex rib |
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; etc.) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention provides a battery pack 100 installed at the bottom of a vehicle cabin of an automobile.
In the embodiment of the present invention, as shown in fig. 1 to fig. 3, the battery pack 100 includes an upper casing 110, a lower casing 120, a battery cell stack 130, and a wire harness isolation plate 140, wherein the upper casing 110 and the lower casing 120 are mutually covered and enclosed to form an accommodating space. The cell stack 130 is installed in the accommodating space and installed on the upper casing 110, the cell stack 130 includes a plurality of single cells 131, and the single cells 131 are arranged in the same direction according to a preset arrangement mode to form the cell stack 130. The wire harness isolation plate 140 is located between the core stack 130 and the lower case 120, and the wire harness isolation plate 140 is fastened to the upper case 110.
Specifically, the battery pack 100 includes an upper case 110 and a lower case 120 that are covered with each other, and is fixed at the bottom of the vehicle cabin through the upper case 110, and the cell stack 130 is installed in an accommodating space formed by the upper case 110 and the lower case 120 enclosing together. The specific structure of the cell stack 130 is generally: the electric core stack 130 is formed by fixing a plurality of single cells 131 in a specific arrangement manner, and the plurality of single cells 131 are all mounted on one side of the upper casing 110 facing the accommodating space. In addition, in order to enhance the connection strength between the plurality of battery cells 131, the overall mode of the core stack 130 is ensured, and the use safety of the battery pack 100 is improved. A plurality of cross members are often provided inside the battery pack 100. However, the existence of the transverse beams inevitably occupies the bearing space in the battery pack 100, and the energy density of the battery pack 100 as a whole is reduced. And a wire harness or a circuit board is required to ensure electrical connection between the respective electric core stacks 130. In the prior art, a conductive circuit board is disposed between the upper casing 110 and the cell stack 130, and is only used for performing electrical connection and signal transmission between different battery cells 131. In this embodiment, the wire harness isolation plate 140 is located between the core stack 130 and the lower case 120, and the wire harness isolation plate 140 is fastened to the upper case 110. The electric core stack 130 is arranged on the wiring harness isolation plate 140, the wiring harness isolation plate 140 plays a role in bearing electrical connection and signal transmission between different battery monomers 131 and simultaneously bears the weight of a part of the battery monomers 131, so that the plurality of battery monomers 131 are fixedly arranged between the upper shell 110 and the wiring harness isolation plate 140, a transverse longitudinal beam is not required to be additionally arranged to enhance the installation strength of the battery monomers 131 and the upper shell 110, the occupied space of the transverse longitudinal beam is reduced, and the integral energy density of the battery pack 100 is improved. The battery cell 131 may be a square aluminum battery, a blade battery cell, a cylindrical battery cell, a soft package battery cell, or the like.
In one embodiment, the harness isolation plate 140 is fastened to the upper housing 110 by a first fastening member, and a mounting cross member 111 is provided on a side of the upper housing 110 facing the cabin, the mounting cross member 111 is used for mounting the battery pack 100, and one end of the first fastening member penetrates through the upper housing 110 and is connected to the mounting cross member 111, and the other end is connected to the harness isolation plate 140. Specifically, the harness isolation plate 140 is fastened to the upper case 110 by a first fastener, thereby achieving a fastened connection between the harness isolation plate 140 and the upper case 110. The automobile adopts a CTC (Cell to Chassis) battery pack 100 integration scheme design, namely a battery integration technology, the technology can directly install the battery pack 100 on a Chassis of the automobile, and an upper shell 110 of the battery pack 100 is directly used as a bottom plate of an automobile cabin, so that an integrated structure of the battery pack 100 and an automobile body is realized. And the mounting cross member 111 of the upper case 110 is used to mount the battery pack 100 on the vehicle. One end of the first fastening member penetrates the upper case 110 to be connected to the mounting beam 111, and since the upper case 110 is a thin-walled case and has a limited mounting strength, the connection of the first fastening member to the mounting beam 111 can further disperse the bearing strength required by the upper case 110. And the other end is connected to the harness isolation plate 140 so as to hang the harness isolation plate 140, thereby improving the fixing strength of the harness isolation plate 140 and further improving the carrying capacity of the battery pack 100. Of course, in other embodiments, two suspension arms may extend from the harness isolation plate 140, one end of each suspension arm is connected to the upper housing 110, and the other end is connected to the harness isolation plate 140. In this embodiment, the first fastening member is a fastening bolt, but in other embodiments, the first fastening member may also be a fastening screw or other riveting member.
According to the technical scheme of the invention, the upper shell 110 and the lower shell 120 are mutually covered, the upper shell 110 and the lower shell 120 jointly enclose to form an accommodating space, the cell stack 130 is arranged in the accommodating space and is arranged on the upper shell 110, the cell stack 130 comprises a plurality of single cells 131, and the single cells 131 are arranged in the same direction according to a preset arrangement mode to form the cell stack 130. A wire harness isolation plate 140 is installed between the electric core stack 130 and the lower case 120, and the wire harness isolation plate 140 is fastened to the upper case 110. The electric core stack 130 is arranged on the wiring harness isolation plate 140, the wiring harness isolation plate 140 bears the weight of part of the battery monomers 131 when the wiring harness isolation plate 140 bears the electric and signal transmission between different battery monomers 131, and then the battery monomers 131 are fixedly arranged between the upper shell 110 and the wiring harness isolation plate 140, so that no transverse longitudinal beam is required to be additionally arranged, the occupied space of the transverse longitudinal beam is reduced, and the integral energy density of the battery pack 100 is improved.
Further, the harness isolation board 140 is provided with a mounting groove 141, a conductive member is arranged in the mounting groove 141, and the post 132 of the battery cell 131 is inserted into the mounting groove 141 and electrically connected to the conductive member, so as to electrically connect the plurality of battery cells 131. Specifically, the wire harness isolation plate 140 serves as a circuit board to undertake circuit connection between different battery cells 131 in the battery pack 100, the conductive piece is clamped and fixed in the mounting groove 141, the posts 132 on the battery cells 131 are inserted into the mounting groove 141 and are in contact with the conductive piece, so that electric connection between the battery cells 131 is realized, and stability of the electric connection is ensured.
Referring to fig. 1 to fig. 3 again, in an embodiment, an end surface of each battery cell 131 facing the lower case 120 is provided with an explosion-proof valve 133, a smoke exhaust channel 142 is provided on the harness isolation plate 140, the explosion-proof valve 133 is provided above the smoke exhaust channel 142, and the lower case 120 is provided with a pressure relief valve 121 to exhaust gas generated by the cell stack 130 out of the battery pack 100. Specifically, some side reactions can take place under the circumstances such as the short circuit, overcharge inside battery monomer 131, and then produce a certain amount of gas, if the heat is not in time effluvium, increase to when certain degree along with gas, can lead to some battery monomer 131 in the electric core stack 130 inside thermal runaway phenomenon to appear, and then explosion-proof valve 133 explodes, burst the lower casing 120 of battery package 100, and spout high-pressure high-temperature gas, still can stretch on other battery monomer 131 simultaneously, make other battery monomer 131 also take place thermal runaway phenomenon, and then make more high-temperature high-pressure gas rush out. In the prior art, the explosion-proof valve 133 is generally disposed on a side facing the cabin, so that the explosion-proof valve 133 may damage the cabin when it is exploded, and therefore, fire-proof heat-insulating materials such as mica plates are required to be disposed to reduce the damage of the high-temperature and high-pressure gas generated by the battery cells 131 to the cabin, so that the protection effect is limited, the overall weight and volume of the battery pack 100 are increased, and the energy density of the battery pack 100 is reduced. Therefore, each single battery 131 is provided with an explosion-proof valve 133 towards the end of the lower shell 120, so that the lower end of the cell stack 130 is provided with a plurality of explosion-proof valves 133, that is, one end of the cell stack 130 with the explosion-proof valves 133 is arranged downwards, that is, the end is arranged away from the cabin, that is, the cell stack 130 is inverted, when thermal runaway occurs inside the single battery 131, high-temperature and high-pressure gas in the single battery 131 rushes the explosion-proof valves 133 firstly to discharge the internal gas, so that the impact force generated when the explosion-proof valves 133 explode faces the ground, the cabin is not damaged, and the damage to the cabin caused by the thermal runaway of the single battery is reduced. And fire-proof and heat-insulating materials such as mica plates are not required, thereby reducing the weight and the protection cost of the battery pack 100.
And in order to ensure that when the thermal runaway occurs in the core stack 130, the gas in the battery cell 131 can be discharged out of the battery pack 100 in time, the smoke exhaust channel 142 is arranged on the harness isolation plate 140, and the smoke exhaust channel 142 is arranged below the explosion-proof valve 133, when the thermal runaway occurs in the battery cell 131, the gas in the battery cell 131 which rushes open the explosion-proof valve 133 is discharged into the smoke exhaust channel 142 and flows in the smoke exhaust channel 142, and the smoke exhaust channel 142 extends to the position of the pressure release valve 121, so that the high-temperature and high-pressure gas is smoothly discharged out of the body.
Of course, in other embodiments, the end of the cell stack 130 having the explosion-proof valve 133 may also be disposed toward the side of the automobile, so as to reduce the damage to the cabin caused by the impact force when the explosion-proof valve 133 explodes, thereby reducing the damage to the cabin when the single battery is out of control due to heat. And when the position of the explosion-proof valve 133 is adjusted, the position of the harness isolation plate 140 corresponding thereto also needs to be adjusted.
In this embodiment, the upper housing 110 and the lower housing 120 are fastened and connected by bolts, so that the lower housing 120 can be conveniently detached, and when the bottom of the automobile is scratched and the lower housing 120 is damaged, the bolts only need to be detached and the lower housing 120 needs to be replaced. Of course, in other embodiments, the connection may be made by snap-fit or adhesive.
In one embodiment, the harness isolation plate 140 has a gap with the inner surface of the lower housing 120. Specifically, the placing direction of the battery cell stack 130 is adjusted according to the scheme, the arrangement of the battery cell stack 130 and the fixation of the battery cell stack 130 on the upper shell 110, which are made of fireproof materials, is omitted, so that the distance from the lower shell 120 to the battery cell stack 130 can be set and increased without increasing the volume of the battery pack 100, the installation space of the wiring harness isolation plate 140 is increased, namely, a gap is arranged between the wiring harness isolation plate 140 and the inner surface of the lower shell 120, the collapse space of the battery pack is increased, and the possibility that the battery cell stack 130 is damaged when the bottom of the battery pack 100 is scratched is reduced.
Referring to fig. 1 to 6, in an embodiment, a plurality of liquid cooling bands 150 are disposed in the accommodating space at intervals, and the plurality of liquid cooling bands 150 are clamped between the plurality of battery cells 131. Specifically, in the prior art, in order to prevent the battery pack 100 from being overheated, a heat dissipation channel is disposed inside the battery pack 100, or a heat dissipation plate is mounted on the surface of the battery pack 100, so that heat is taken away by wind current generated during the traveling process of the vehicle, thereby helping the battery pack 100 to dissipate heat. However, with the development of batteries, the energy density of the battery pack 100 is continuously increased, and the heat dissipation requirement of the battery pack 100 is gradually increased, so that the conventional air cooling heat dissipation is difficult to meet the requirement. Therefore, a plurality of liquid cooling bands 150 are disposed in the battery pack 100, and the plurality of liquid cooling bands 150 are sandwiched between the plurality of battery cells 131. That is, the single batteries 131 and the liquid cooling belt 150 in the battery cell stack 130 are alternately arranged, and the liquid cooling belt 150 is attached to the surfaces of the single batteries 131 and clamps the single batteries 131, so that not only can heat on the surfaces of the single batteries 131 be taken away, but also an important role can be provided for the installation of different single batteries 131.
Further, in order to ensure the heat dissipation effect, at least one side of the battery cell 131 is provided with a liquid cooling belt 150. Specifically, referring to fig. 6, when the single cells 131 are disposed on only one side of the single cells 131, that is, one liquid cooling zone 150 is disposed at every two single cells 131 along the arrangement direction of the single cells 131; referring to fig. 5, when the battery cells 131 are disposed on both sides of the battery cell 131, that is, along the arrangement direction of the battery cells 131, the battery cells 131 and the liquid cooling belt 150 are alternately disposed in sequence. And the plurality of liquid cooling zones 150 are clamped between the plurality of battery cells 131, which serves as a cross beam and further enhances the installation stability of the battery cells 131.
In addition, in the embodiment, the liquid cooling belt 150 is distributed on the side surface of the battery cell 131, that is, the surface with the largest area of the battery cell 131, so as to take away the heat generated by the battery cell 131 to the greatest extent. Of course, in other embodiments, the liquid-cooled bands 150 may be disposed on other sides of the battery cells 131. And the liquid cooling tape 150 is adhered to the surface of the battery cell 131 by a double-sided adhesive tape or a pressure sensitive adhesive, thereby improving the structural integrity of the electric core stack 130.
Further, referring to fig. 2, the liquid cooling belt 150 is adhered to the upper housing 110, and the liquid cooling belt 150 is formed of an aluminum alloy through an extrusion process. The liquid cooling tape 150 is adhered to the upper case 110, and the liquid cooling tape 150 is clamped between the battery cells 131, so that the contact area between the cell stack 130 and the upper case 110 is increased, and the installation stability of the cell stack 130 is further increased. And the liquid cooling belt 150 is formed by aluminum alloy through an extrusion process, that is, the liquid cooling belt 150 is integrally formed, so that the structural strength of the liquid cooling belt 150 along the extension direction of the battery monomer 131 is enhanced, the weight of the battery monomer 131 is further borne, and the installation stability of the battery monomer 131 is improved.
In an embodiment, referring to fig. 4 in combination, the liquid-cooling belt 150 includes a first side plate 151 and a second side plate 152 disposed opposite to each other, the first side plate 151 and the second side plate 152 enclose a liquid-cooling chamber 153, a plurality of buffer plates 154 are connected between the first side plate 151 and the second side plate 152, the plurality of buffer plates 154 are spaced in the liquid-cooling chamber 153, and the buffer plates 154 are disposed in an inclined manner. Specifically, the first side plate 151 and the second side plate 152 enclose each other to form a liquid cooling chamber 153, cooling liquid flows in the liquid cooling chamber 153 to take away heat generated by the battery cells 131, and a plurality of buffer plates 154 are connected between the first side plate 151 and the second side plate 152, and the plurality of buffer plates 154 are arranged at intervals in the liquid cooling chamber 153, so that on one hand, the buffer plates 154 are connected with the first side plate 151 and the second side plate 152 to enhance the structural strength in the liquid cooling zone 150; on the other hand, the liquid cooling chamber 153 is divided into a plurality of flow pipes, so that the cooling liquid flows along the liquid cooling pipes, and the fluidity of the cooling liquid is enhanced. And the buffer plate 154 is obliquely arranged so that the liquid cooling belt 150 can absorb partial deformation of the core stack 130 when the battery cells 131 thermally expand, and the buffer plate 154 is obliquely arranged so that the buffer plate 154 is easily mechanically unstable in the liquid cooling chamber 153, thereby absorbing more expansion force generated by the core stack 130.
Furthermore, a limiting rib 155 is arranged on the first side plate 151 and/or the second side plate 152, and the limiting rib 155 is arranged towards the liquid cooling cavity 153 to limit the limit position at which any one of the first side plate 151 and the second side plate 152 deforms towards the other. Specifically, when the single battery 131 presses the liquid-cooling belt 150, in order to reduce the possibility that the first side plate 151 and the second side plate 152 are completely attached to each other, and thus the liquid-cooling effect of the liquid-cooling belt 150 fails, the first side plate 151 and/or the second side plate 152 are/is provided with the limiting convex rib 155, and the limiting convex rib 155 limits the limit position at which any one of the first side plate 151 and the second side plate 152 deforms toward the other. When the deformation reaches the limit, the first side plate 151 and/or the second side plate 152 abuts against the limiting convex rib 155, so that the liquid cooling belt 150 is guaranteed to have the minimum liquid cooling flow.
In one embodiment, the cell stack 130 is adhered to the upper casing 110. That is, the electrical core stack 130 is abutted and fixed on the upper casing 110, and the electrical core stack 130 is adhered to the upper casing 110 through the structural adhesive, so that the lower casing 120 only needs to have a wrapping protection effect on the electrical core stack 130, and does not need to have a bearing effect, thereby further reducing the requirement on the strength of the lower casing 120.
Referring to fig. 1 to 3, in another embodiment, the cell stack 130 is fastened to the upper case 110 by a second fastener. Thereby fixedly mounting the electrical core stack 130 to the upper case 110. Wherein, the second fastener can be a fastening structure such as a bolt or a screw.
In one embodiment, the upper housing 110 is integrally formed. Compare in adopting the polylith panel beating welding to form, this scheme has improved the intensity of going up casing 110, satisfies the demand of bearing of whole battery package 100, and can directly regard as cabin bottom plate because of last casing 110, so further increase the intensity of cabin bottom plate, satisfy and trample the demand. Compared with increasing the thickness of the upper case 110 to increase the strength, the present solution reduces the volume and weight of the battery pack 100 and simplifies the structure. The upper housing 110 may be integrally formed by casting, or may be integrally formed by an extrusion process or a stamping process.
In one embodiment, the lower case 120 is formed of a thin-walled steel plate or an aluminum alloy through a stamping process or an extrusion process. Specifically, the lower case 120 is obtained through a stamping process or an extrusion process using a thin metal material, on one hand, the stamping process and the extrusion process can reduce the thickness of the lower case 120 compared to a casting process, thereby reducing material waste of the battery pack 100, and on the other hand, the stamping process and the extrusion process have higher production efficiency and lower cost. Of course, in other embodiments, the lower housing 120 may be integrally formed by a casting process.
In another embodiment, the harness isolation plate 140 is integrally formed. Thereby enhancing the overall structural strength of the harness isolation plate 140 and improving the load-carrying capacity of the harness isolation plate 140. The wire harness isolation plate 140 may be integrally formed by an injection molding process or a hot pressing process.
The present invention further provides an automobile, which includes an automobile cabin and a battery pack 100, and the specific structure of the battery pack 100 refers to the above embodiments, and since the automobile adopts all technical solutions of all the above embodiments, the automobile at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein. Wherein, the battery pack 100 is arranged at the bottom of the vehicle cabin.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A battery pack (100), comprising:
the upper shell (110) and the lower shell (120) are mutually covered, and the upper shell (110) and the lower shell (120) jointly enclose to form an accommodating space;
the electric core stack (130) is arranged in the accommodating space and is installed on the upper shell (110), the electric core stack (130) comprises a plurality of single batteries (131), and the single batteries (131) are arranged in the same direction according to a preset arrangement mode to form the electric core stack (130); and the number of the first and second groups,
a harness insulation plate (140) between the electrical core stack (130) and the lower case (120), and the harness insulation plate (140) is fastened to the upper case (110).
2. The battery pack (100) of claim 1, wherein the harness isolation plate (140) is provided with a mounting groove (141), a conductive member is disposed in the mounting groove (141), and the post (132) of the battery cell (131) is inserted into the mounting groove (141) and electrically connected to the conductive member, so as to electrically connect the plurality of battery cells (131).
3. The battery pack (100) according to claim 1, wherein an explosion-proof valve (133) is disposed on an end surface of each battery cell (131) facing the harness isolation plate (140), a smoke exhaust channel (142) is disposed on the harness isolation plate (140), the explosion-proof valve (133) is disposed above the smoke exhaust channel (142), and a pressure relief valve (121) is disposed on the lower housing (120) to discharge generated gas out of the battery pack (100) when the thermal runaway of the core stack (130) occurs.
4. The battery pack (100) according to claim 1, wherein the harness isolation plate (140) has a gap with an inner surface of the lower case (120).
5. The battery pack (100) according to claim 1, wherein the harness isolation plate (140) is fastened to the upper case (110) by a first fastening member, and a side of the upper case (110) facing a cabin is provided with a mounting beam (111), the mounting beam (111) is used for mounting the battery pack (100), one end of the first fastening member penetrates through the upper case (110) to be connected to the mounting beam (111), and the other end is connected to the harness isolation plate (140).
6. The battery pack (100) of claim 1, wherein the accommodating space has a plurality of spaced liquid cooling strips (150) disposed therein, the liquid cooling strips (150) are sandwiched between the battery cells (131), and the liquid cooling strips (150) are disposed on at least one side of the battery cells (131).
7. The battery pack (100) according to claim 6, wherein the liquid cooling band (150) comprises a first side plate (151) and a second side plate (152) which are opposite to each other, the first side plate (151) and the second side plate (152) enclose each other to form a liquid cooling chamber (153), a plurality of buffer plates (154) are connected between the first side plate (151) and the second side plate (152), the plurality of buffer plates (154) are arranged at intervals in the liquid cooling chamber (153), the buffer plates (154) are obliquely arranged, a limiting convex rib (155) is formed on the first side plate (151) and/or the second side plate (152), and the limiting convex rib (155) is arranged towards the liquid cooling chamber (153) to limit a limit position at which one of the first side plate (151) and the second side plate (152) deforms towards the other.
8. The battery pack (100) according to claim 6, wherein the liquid-cooled strip (150) is adhered to the upper case (110), and the liquid-cooled strip (150) is formed of an aluminum alloy through an extrusion process; and/or the presence of a gas in the gas,
the battery cell (131) is adhered to or fixed to the upper case (110) by a second fastening member.
9. The battery pack (100) according to any one of claims 1 to 8, wherein the upper case (110) is integrally formed; and/or the presence of a gas in the gas,
the lower shell (120) is formed by a thin-wall steel plate or an aluminum alloy through a stamping process or an extrusion process; and/or the presence of a gas in the atmosphere,
the harness isolation plate (140) is integrally formed.
10. An automobile, characterized in that it comprises a cabin and a battery pack (100) according to any one of claims 1 to 9, said battery pack (100) being arranged at the bottom of said cabin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211100943.2A CN115377590B (en) | 2022-09-09 | 2022-09-09 | Battery pack and automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211100943.2A CN115377590B (en) | 2022-09-09 | 2022-09-09 | Battery pack and automobile |
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| CN115377590A true CN115377590A (en) | 2022-11-22 |
| CN115377590B CN115377590B (en) | 2024-07-19 |
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| CN115498345A (en) * | 2022-09-09 | 2022-12-20 | 海南小鹏汽车科技有限公司 | Wiring harness isolation plate, battery pack and automobile |
| WO2024178536A1 (en) * | 2023-02-27 | 2024-09-06 | 宁德时代新能源科技股份有限公司 | Battery and electrical apparatus |
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| Publication number | Publication date |
|---|---|
| CN115377590B (en) | 2024-07-19 |
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