CN116691310A - Battery box assembly for electric vehicle - Google Patents
Battery box assembly for electric vehicle Download PDFInfo
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- CN116691310A CN116691310A CN202310986622.5A CN202310986622A CN116691310A CN 116691310 A CN116691310 A CN 116691310A CN 202310986622 A CN202310986622 A CN 202310986622A CN 116691310 A CN116691310 A CN 116691310A
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- battery
- box body
- box
- battery box
- girder
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- 238000009434 installation Methods 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 235000014676 Phragmites communis Nutrition 0.000 claims description 5
- 244000089486 Phragmites australis subsp australis Species 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/80—Exchanging energy storage elements, e.g. removable batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
- B60K2001/005—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric storage means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
- B60K2001/0455—Removal or replacement of the energy storages
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Transportation (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Power Engineering (AREA)
- Combustion & Propulsion (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Aviation & Aerospace Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to the technical field of automobile battery replacement equipment, in particular to a battery box assembly for an electric vehicle, which comprises a battery box and a bottom support, wherein the upper part of the bottom surface of the battery box is a first box body, the left side of the bottom surface of the battery box extends downwards to form a second box body, the right side of the bottom surface of the battery box extends downwards to form a third box body, and the bottom support is positioned between the second box body and the third box body and is contacted with the bottom surface of the battery box. The battery box is arranged on the vehicle girder through the bottom support, the second box body and the third box body of the battery box are positioned on the outer side of the vehicle girder, and the installation height of the vehicle girder is overlapped with the installation height of the second box body and the third box body, so that the vehicle girder does not independently occupy the installation height, and the second box body and the third box body fully utilize the height space on two sides of the vehicle girder.
Description
Technical Field
The invention relates to the technical field of automobile battery replacement equipment, in particular to a battery box assembly for replacing a battery of an electric vehicle.
Background
In recent years, the development of electric heavy trucks is rapid, and the electric heavy trucks are widely applied to the field of engineering transportation, and because the electric heavy trucks have the characteristics of heavy load, long operation time and the like, the loaded batteries are large in size and heavy in weight, and long time is required for one-time full charge, so that the operation efficiency of vehicles is reduced, and the development of charging heavy trucks is limited. In order to solve the problem that the charging time is long and the operation efficiency of the vehicle is delayed, a heavy truck power conversion system is generated, when power needs to be converted, a hoisting mode is adopted, a battery box of the vehicle to be converted is taken out, the battery box charged in the power conversion system is converted, and the converted battery box to be charged is stored in the power conversion system for charging, so that the service efficiency of the electric heavy truck can be greatly improved.
At present, the bottom of the battery box of most heavy trucks is of a plane structure, and when the battery box is installed, the bottom of the battery box is fixedly connected with an automobile girder, namely, the battery box is integrally positioned above the automobile girder. The bottom of the battery box body in the heavy-duty battery replacement system is of a planar structure, such as a heavy-duty battery box disclosed in China patent with an issued publication number of CN 218957938U, a battery box disclosed in a patent application with an application publication number of CN 108110172A and a battery box body in a heavy-duty battery replacement system disclosed in a patent application with an application publication number of CN 115303232A. After the battery box is installed on the automobile girder, the space on two sides of the automobile girder is vacated, so that space is wasted, when the same electric quantity is contained, the height space occupied by the battery box with the bottom of a planar structure is larger, the overall installation height of the battery box is higher, and the development requirement of compactness of a vehicle is not facilitated.
In addition, the internal device layout of a vehicle-mounted battery box used by the existing electric heavy truck is unreasonable, and the layout of a battery pack, a high-voltage box, a water cooling unit and a circuit and a pipeline of a quick-change electric connector is disordered, so that the wiring occupies a large space.
Moreover, the battery box of most electric heavy trucks and the automobile girder are roughly positioned and installed from four corners in a clearance plug-in mode, so that positioning points are fewer, and when the electric heavy trucks encounter a pothole road surface to shake in the running process, the battery box is easy to shake, and certain potential safety hazards are provided.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the battery box assembly for the electric vehicle, which has lower installation height under the condition of containing the same electric quantity, and is safe and reliable, the battery box assembly for the electric vehicle is positioned and locked in a multi-point and multi-mode manner, and even if a truck encounters pothole vibration, the displacement is not generated.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a trade electric battery box subassembly for electric vehicle, includes battery box and collet, and the upper portion of battery box bottom surface is first box, and battery box bottom surface left side downwardly extending forms the second box, and battery box bottom surface right side downwardly extending forms the third box, the collet is located between second box and the third box and with battery box bottom surface contact.
Further, a first electric connector is arranged at the center of the bottom of the first box body, a second electric connector is arranged at the center of the upper part of the bottom support, and the first electric connector is electrically connected with the second electric connector;
a plurality of battery packs are further arranged in the first box body, and electrode interfaces of all the battery packs point to or face away from the direction of the cab;
a water cooling assembly is arranged in the second box body, and a high-pressure box is arranged in the third box body; or a high-pressure box is arranged in the second box body, and a water cooling component is arranged in the third box body.
Further, the first box body at least comprises an N-layer battery pack mounting structure, and the 1 st layer, the 2 nd layer and the N th layer are arranged from the bottom surface of the battery box upwards in sequence, wherein N is more than or equal to 2; each layer of battery pack mounting structure is provided with M battery pack mounting units, wherein M is more than or equal to 3, a first electric connector is arranged in the mounting unit at the middle part of the 1 st layer, and battery packs are arranged in the rest of the mounting units.
Further, the top mounting height of the first box body is lower than the height of the rear window of the cab, and the second box body and the third box body extend downwards to a length exceeding the bottom support and are not in contact with the ground.
Further, the collet includes the frame body, and the frame body includes first girder, second girder, and first girder and second girder are along vehicle length direction parallel arrangement, are provided with the frame crossbeam between first girder and the second girder, are provided with one-level guider on first girder, the second girder.
Further, a first guide inclined plane is arranged on the upper surface of the primary guide device, and the first guide inclined plane is inclined upwards and inwards from the outer edges of the first main beam and the second main beam; and the first guide inclined plane is provided with a wear-resisting plate.
Further, the wear-resisting plate covers the whole first guide inclined plane and extends downwards vertically from the bottom of the first guide inclined plane, and is fixedly connected to the outer side walls of the first main beam and the second main beam respectively; the opposite side surfaces of the second box body and the third box body are respectively contacted with the wear-resisting plates on the outer side walls of the first main beam and the second main beam.
Further, an inner frame body is arranged in the outer frame body, a secondary guide device is arranged between the outer frame body and the inner frame body, the secondary guide device is of a square columnar structure, a second guide inclined plane is arranged on the upper portion of the secondary guide device, two side faces of the first battery box, which are arranged along the width direction of the vehicle, correspond to the second guide inclined plane, and the second guide inclined plane is inclined inwards from bottom to top.
Further, a first locking device is transversely arranged in the middle of the secondary guide device, a first cross beam and a second cross beam are arranged at the bottom of the first battery box in parallel along the width direction of the vehicle, and locking blocks matched with the first locking device are arranged on the upper surfaces of the first cross beam and the second cross beam.
Further, a second locking device is arranged on the side surface of the second-stage guide device, which is opposite to the outer frame cross beam, and the second locking device is respectively abutted against the first cross beam and the second cross beam;
the second-stage guide device is provided with a third locking device along the opposite side surfaces of the length direction of the outer frame cross beam, the bottom of the first battery box is provided with a first longitudinal beam and a second longitudinal beam in parallel along the length direction of the vehicle, and the third locking device is respectively abutted with the first longitudinal beam and the second longitudinal beam at the bottom of the first battery box;
the second locking device and the third locking device are elastic reeds.
Further, a plurality of supporting beams are arranged in the middle of the inner frame body, and a second electric connector is arranged on the supporting beams; three-stage guiding and positioning devices are arranged between the inner frame body and the outer frame body, the three-stage guiding and positioning devices are arranged along the width direction of the vehicle and are positioned between the two-stage guiding devices, and positioning holes corresponding to the three-stage guiding and positioning devices are formed in the bottom surface of the battery box.
The invention has the beneficial effects that: the invention comprises a battery box and a bottom support, wherein the upper part of the bottom surface of the battery box is a first box body, the left side of the bottom surface of the battery box extends downwards to form a second box body, the right side of the bottom surface of the battery box extends downwards to form a third box body, the bottom support is positioned between the second box body and the third box body and is contacted with the bottom surface of the battery box, the battery box is arranged on a vehicle girder through the bottom support, the second box body and the third box body of the battery box are positioned in the space outside the vehicle girder, the installation height of the vehicle girder is overlapped with the installation height of the second box body and the third box body, so that the vehicle girder does not independently occupy the installation height, and the second box body and the third box body fully utilize the height space at two sides of the vehicle girder.
The middle part of a first box body of the battery box is provided with a first electric connector, the middle part of a bottom bracket is provided with a second electric connector connected with the first electric connector, a battery pack is positioned in the first box body, and an electrode interface of the battery pack points to or faces away from the direction of a cab; the second box body is provided with an internal water cooling component, the third box body is internally provided with a high-pressure box or the second box body is internally provided with a high-pressure box, and the third box body is internally provided with a water cooling component. Through the arrangement, the circuit of the battery pack, the electric connector and the high-voltage box and the pipeline of the water cooling assembly are arranged simply, clearly and smoothly without roundabout folding, the occupied space is small, the defect that the pipelines and the wires occupy a large space due to messy wiring caused by unreasonable layout in the prior art is overcome.
The invention is provided with the primary guide device, the secondary guide device and the tertiary guide positioning device to guide and position the battery box from different directions, so that the installation is quick and convenient, and the battery box is more stable due to multi-point positioning; the battery box is locked through the first locking device, the second locking device and the third locking device, so that the battery box and the bracket are effectively prevented from generating relative displacement; the primary guide device, the secondary guide device, the tertiary guide positioning device, the first locking device, the second locking device and the third locking device have a synergistic effect, the defect that the battery box is easy to shake when the truck encounters a pothole road surface in the running process due to the fact that the conventional truck is only roughly positioned at four corners is overcome, and the battery box cannot shake and shift even when the truck encounters the pothole vibration, so that the safety is high.
The invention comprises a battery box and a bottom bracket, wherein the bottom of the bottom bracket is fixedly connected to a girder of a vehicle, the bottom bracket not only plays a role in connecting the vehicle and the battery box, but also supports the battery box from four directions of front, back, left and right of the bottom of the first box body, compared with the case that the battery box is directly arranged on the girder of the vehicle, the battery box is supported by adopting the bottom bracket to ensure that the battery box is more stable, therefore, the width of the battery box can be designed according to the maximum distance between the outer sides of the two girders of the truck, so that the width space between the outer sides of the two girders of the truck is effectively utilized, the number of layers of the battery box can be reduced under the condition of accommodating the same battery pack, the overall height of the battery box is reduced, and the advantage is further provided for compact design of the truck.
Drawings
Fig. 1 is a schematic perspective view of a battery box according to the present invention;
FIG. 2 is a schematic view of the rear frame structure of the battery box of the present invention with the front panel removed;
FIG. 3 is a schematic view of a shoe structure according to the present invention;
FIG. 4 is a schematic view of the connection structure of the mounting bracket and the bracket of the present invention;
FIG. 5 is a schematic view of the positional relationship of the secondary guide and the first locking device;
FIG. 6 is a schematic view of the partial explosion configuration of FIG. 5;
FIG. 7 is a schematic view of a second locking device;
FIG. 8 is a schematic view of a third guiding and positioning device;
in the figure:
the battery box 1, the battery box bottom surface 11, the first box body 12, the first cross beam 121, the second cross beam 122, the locking piece 123, the first longitudinal beam 124, the second longitudinal beam 125, the positioning hole 126, the second box body 13, the third box body 14 and the first electric connector 15;
the shoe 2, the second electrical connector 21, the first main beam 22, the second main beam 23, the outer frame cross beam 24, the primary guide 25, the first guide slope 251, the wear plate 26, the inner frame 27, the secondary guide 28, the second guide slope 281, the mounting hole 282, the wear sleeve 283, and the guide holder 284.
The first locking device 29, the sleeve 291, the lock tongue 292, the second locking device 210, the third locking device 211, the support beam 212 and the three-stage guiding and positioning device 213;
mounting bracket 3, angular support plate 31.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 to 4, this embodiment is a battery box assembly for a battery of an electric vehicle, comprising a battery box 1 and a shoe 2, wherein the upper part of the bottom surface 11 of the battery box is a first box 12, the left side of the bottom surface 11 of the battery box extends downwards to form a second box 13, the right side of the bottom surface 11 of the battery box extends downwards to form a third box 14, and the shoe 2 is located between the second box 13 and the third box 14 and contacts with the bottom surface 11 of the battery box.
The bottom of the collet 2 is fixedly connected with the vehicle girder through the mounting bracket 3, the collet 2 and the vehicle girder are both positioned between the second box body 13 and the third box body 14, so that the battery box 1 is arranged on the vehicle girder in a crossing manner, namely, the second box body 13 and the third box body 14 of the battery box 1 are positioned in the spaces at two sides of the vehicle girder, the mounting height of the vehicle girder is overlapped with the second box body 13 and the third box body 14, and the vehicle girder does not occupy the height space independently on the mounting height, therefore, compared with a battery box assembly with the battery box being a single box body and having the same plane structure at the bottom, the mounting height of the battery box is at least reduced, and if the height direction space at two sides of the vehicle girder is larger, the second box body 13 and the third box body 14 can be all arranged in the spaces at two sides of the vehicle girder, so that the mounting height of the battery box 1 is minimized.
In some embodiments, in order to facilitate wiring and minimize the wires for space saving purposes, a first electrical connector 15 is centrally disposed at the bottom of the first box 12, a second electrical connector 21 is centrally disposed at the upper portion of the base 2, and the first electrical connector 15 is electrically connected with the second electrical connector 21;
in this embodiment, a plurality of battery packs are further disposed in the first case 12, and electrode interfaces of all the battery packs are directed toward or away from the direction of the cab, so as to achieve the purposes of minimizing the connection line between the battery packs and reducing the space occupied by the circuit in the battery case 1;
in this embodiment, in order to facilitate the arrangement of the pipeline, the pipeline is made shortest, the space occupied by the pipeline in the battery box is reduced, a water cooling assembly is arranged in the second box 13, and a high-pressure box is arranged in the third box 14; or a high-pressure box is arranged in the second box body 13, and a water cooling component is arranged in the third box body 14.
For a clearer view of the case structure of the battery case, the battery pack, the water cooling assembly, and the high voltage case are not shown in fig. 1 and 2.
The first box body 12 at least comprises N layers of battery pack mounting structures, and the 1 st layer, the 2 nd layer and the N th layer are arranged from the bottom surface 11 of the battery box upwards in sequence, wherein N is more than or equal to 2; each layer of battery pack mounting structure is provided with M battery pack mounting units, wherein M is more than or equal to 3, a first electric connector 15 is arranged in the mounting unit positioned in the middle of the 1 st layer, and battery packs are arranged in the rest of the mounting units, so that pipelines are shortest and occupied space is minimum; the second box 13 is internally provided with a water cooling assembly, the third box 14 is internally provided with a high-voltage box, wiring and pipe arrangement are simple and convenient, pipelines are shortest, occupied space is minimum, the installation height and the whole volume of the battery box assembly are further reduced, the compactness of a vehicle is convenient to improve, through the layout arrangement, under the condition of containing the same battery pack, the original structure needs 4 layers of battery pack installation space, the structure only needs three layers of battery pack installation space, and the height of one layer of battery pack installation space is saved. In some embodiments, the second and third cases 13 and 14 may be provided therein with a battery pack in addition to the high-pressure case and the water cooling assembly.
Specifically, in some embodiments, the first case 12 includes a 2-layer battery pack mounting structure, i.e., layer 1 and layer 2 in order from the bottom surface 11 of the battery case. The first electric connector 15 is arranged in the installation unit at the middle part of the layer 1, the battery packs are arranged in the other installation units, and the battery packs are installed in all the installation units at the layer 2 according to the same direction.
Specifically, in some embodiments, the first case 12 includes a 3-layer battery pack mounting structure, that is, a 1 st layer, a 2 nd layer, and a 3 rd layer are sequentially arranged from the bottom surface 11 of the battery case upwards, where the battery packs are distributed in the remaining mounting units except for the first electrical connector 15 provided in the middle mounting unit of the 1 st layer, and the battery packs are distributed in the same direction in all the mounting units of the 2 nd layer and the 3 rd layer.
Specifically, in some embodiments, the first case 12 includes a 4-layer battery pack mounting structure, that is, a 1 st layer, a 2 nd layer, a 3 rd layer, and a 4 th layer are sequentially arranged from the bottom surface 11 of the battery case upwards, the 1 st layer is provided with the first electrical connector 15 in the mounting unit except the middle part, the battery packs are uniformly distributed in the rest of the mounting units, and the battery packs are uniformly distributed in all the mounting units of the 2 nd layer and the 3 rd layer.
In some embodiments, in order to facilitate the observation of the external condition of the truck, the top mounting height of the first box 12 is lower than the height of the rear window of the cab, and in order to use the space on both sides of the vehicle girder to the maximum extent, thereby reducing the overall height of the battery box assembly to the maximum extent, the second box 13 and the third box 14 extend downward beyond the bottom bracket 2 and do not contact with the ground.
In some embodiments, in order to improve the stability of the support of the bottom bracket 2, the bottom bracket 2 includes an outer frame body, the outer frame body includes a first main beam 22 and a second main beam 23, the first main beam 22 and the second main beam 23 are disposed in parallel along the length direction of the vehicle, an outer frame cross beam 24 is disposed between the first main beam 22 and the second main beam 23, and for installing the battery box conveniently, a primary guide device 25 is disposed on the first main beam 22 and the second main beam 23.
In some embodiments, the upper surface of the primary guide 25 is provided with a first guide inclined surface 251, and the first guide inclined surface 251 is inclined upward and inward from the outer edges of the first and second main beams 22 and 23; to improve the wear resistance of the first guide inclined surface 251, which is provided with the wear plate 26, wear is prevented and the service life of the shoe is prolonged.
In some embodiments, the wear plate 26 covers the entire first guiding inclined plane 251 and extends vertically downward from the bottom of the first guiding inclined plane 251, and is fixedly connected to the outer side walls of the first main beam 22 and the second main beam 23; the opposite side of the second housing 13 from the third housing 14 is in contact with wear plates 26 on the outer side walls of the first and second main beams 22, 23, respectively.
In some embodiments, an inner frame 27 is disposed in the outer frame, and a secondary guiding device 28 is disposed between the outer frame and the inner frame 27 for guiding the first box 12, where the secondary guiding device 28 is disposed outside four corners of the inner frame 27 and is installed in a mirror image.
As shown in fig. 5 and 6, the secondary guide 28 has a square columnar structure, and has a second guide slope 281 provided on the upper portion thereof, and both side surfaces of the first battery case 12 provided in the vehicle width direction correspond to the second guide slope 281, and the second guide slope 281 is inclined upward and inward from below, and when the battery case 1 is mounted, the second guide slope 281 of the secondary guide 28 guides both side surfaces of the first case 12 of the battery case 1 provided in the vehicle width direction.
The secondary guiding device 28 comprises a guiding seat 284, and in order to improve the wear resistance of the guiding seat 284 and prolong the service life of the guiding seat 284, a wear-resistant sleeve 283 is sleeved on the upper part of the guiding seat 284.
In some embodiments, in order to prevent the truck from jolting on a pothole road surface during running, the battery box 1 slides and shifts relative to the bottom bracket 2, a mounting hole 282 is transversely formed in the middle of the secondary guiding device 28, a first locking device 29 is arranged in the mounting hole 282, a first cross beam 121 and a second cross beam 122 are arranged at the bottom of the first battery box 12 in parallel along the width direction of the vehicle, and locking blocks 123 matched with the first locking device 29 are arranged on the first cross beam 121 and the second cross beam 122.
Specifically, as shown in fig. 6, the first locking device 29 may be a telescopic locking device driven by a power mechanism, and at least includes a telescopic power assembly (not shown in fig. 6) and a locking assembly, where the telescopic power assembly drives the locking assembly to extend or retract to achieve locking or unlocking. The locking assembly at least comprises a sleeve 291 and a lock tongue 292 arranged in the sleeve 291, wherein an output shaft of the telescopic power assembly is connected with the lock tongue 292 to drive the lock tongue to extend or retract. The telescopic power assembly can be a motor.
In some embodiments, in order to lock the first battery box 12 further from different directions, a second locking device 210 is disposed on a side of the secondary guiding device 28 opposite to the outer frame beam 24, and the second locking device 210 abuts against the first beam 121 and the second beam 122 at the bottom of the first battery box 12, respectively.
In some embodiments, to further lock the first battery box 12 from multiple directions, the second-stage guiding device 28 is provided with a third locking device 211 on the opposite side surfaces along the length direction of the outer frame cross beam 24, the bottom of the first battery box 12 is provided with a first longitudinal beam 124 and a second longitudinal beam 125 in parallel along the length direction of the vehicle, and the third locking device 211 is respectively abutted with the first longitudinal beam 124 and the second longitudinal beam 125.
In some embodiments, as shown in fig. 7, the second locking device 210 and the third locking device 211 are elastic spring pieces with the same structure for easy and quick installation. The elastic reed is of an arc structure, and the middle part of the elastic reed protrudes upwards. The elastic reed clamps the first battery box 12 and the secondary guide device 28 from different directions, so that the stability of the first battery box 12 is further ensured, and the first battery box 12 is prevented from driving the third battery box 13 and the fourth battery box 14 to generate fine displacement, thereby further improving the safety performance of the battery box assembly for the electric vehicle.
In some embodiments, in order to improve the supporting performance of the shoe 2 and facilitate the wiring, the middle part of the inner frame 27 is provided with a plurality of supporting beams 212, and the second electrical connectors 21 are provided on the supporting beams 212; for further guiding and positioning, three-stage guiding and positioning means 213 are provided between the inner frame body 27 and the outer frame body, the three-stage guiding and positioning means 213 being arranged in the vehicle width direction and being located between the two-stage guiding and positioning means 28, and the battery case bottom surface 11 being provided with positioning holes 126 corresponding to the three-stage guiding and positioning means 213.
As shown in fig. 8, for convenience of rapid guiding and positioning, the three-stage guiding and positioning device 213 has a cylindrical structure with a conical top.
In some embodiments, the bottom bracket 2 is safely and reliably installed on a vehicle girder, and the lower part of the main girder of the bottom bracket 2 is provided with a mounting bracket 3. In order to achieve good support and convenient installation, the mounting bracket 3 is a right-angle bracket, a plurality of angle-shaped supporting plates 31 are fixedly arranged on the inner side of the mounting bracket 3, and two right-angle sides of the angle-shaped supporting plates 31 are perpendicular to two right-angle sides of the mounting bracket 3 respectively.
Before the heavy truck leaves the factory, the collet 2 is firstly hoisted on the girder of the truck by adopting the crane, namely, the bottom of the collet 2 is fixedly connected on two girders of the heavy truck by the mounting bracket 3, and then the battery box 1 is hoisted on the collet 2 by the crane. In the installation process, the primary guide device 25 conducts preliminary guide on the second box body 13 and the third box body 14, the battery box 1 is continuously inserted downwards, the secondary guide device 28 on the upper portion of the bottom support 2 is movably inserted with the bottom surface 11 of the battery box, when the bottom surface 11 of the battery box is contacted with the secondary guide device 28, the battery box is continuously inserted downwards, after being guided and positioned by the third guide positioning device 213, the battery box 1 is safely, rapidly and accurately installed on the bottom support 2, and the first battery box 12 is locked through the first locking device 29, the second locking device 210 and the third locking device 211.
The bottom support 2 not only plays a role in connecting a vehicle with the battery box 1, but also has a frame-type structure, is arranged between the second box body 13 and the third box body 14, is overlapped with the second box body 13 and the third box body 14 in installation height, and therefore does not occupy the installation height independently, and supports the battery box 1 from four directions of front, back, left and right in the middle position of the bottom 11 of the battery box, so that the weight distribution of the battery box 1 is uniform, and compared with the battery box which is a single box body and has the same plane structure at the bottom and the battery box which is directly arranged on a vehicle girder, the invention adopts the bottom support 2 to support the bottom 11 of the battery box, and the second box body 13 and the third box body 14 are positioned outside the bottom support 2 and the vehicle girder, and has the advantages of saving height space, convenient installation, preventing the deformation of the battery box 1 and the like.
In addition, because the frame-type collet 2 holds the battery box 1 from the front, back, left and right directions of the battery box bottom 11, the battery box 1 is more stable, and therefore the width of the battery box 1 can be designed according to the maximum distance between the outer sides of two girders of a truck, so that the space between the outer sides of the two girders of the truck is effectively utilized, the number of layers of the battery box 1 can be reduced under the condition of accommodating the same battery pack, the overall height of a battery box assembly is reduced, and the advantage is further provided for compact design of the truck.
Finally, it should be noted that: the foregoing is merely a preferred example of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that the terms "front side, rear side, left side, right side, upper portion, lower portion" and the like are merely specific examples for convenience of description, and are not specific to actual positions, and any simple orientation transformation falls within the scope of the present invention as long as the simple orientation transformation falls within the scope of the present invention.
Claims (11)
1. A battery box assembly for an electric vehicle, characterized by: the battery box comprises a battery box body and a bottom support, wherein the upper part of the bottom surface of the battery box body is a first box body, the left side of the bottom surface of the battery box body extends downwards to form a second box body, the right side of the bottom surface of the battery box body extends downwards to form a third box body, and the bottom support is positioned between the second box body and the third box body and is in contact with the bottom surface of the battery box body.
2. The battery compartment assembly for an electric vehicle of claim 1, wherein: the first electric connector is arranged at the center of the bottom of the first box body, the second electric connector is arranged at the center of the upper part of the bottom support, and the first electric connector is electrically connected with the second electric connector;
a plurality of battery packs are further arranged in the first box body, and electrode interfaces of all the battery packs point to or face away from the direction of the cab;
a water cooling assembly is arranged in the second box body, and a high-pressure box is arranged in the third box body; or a high-pressure box is arranged in the second box body, and a water cooling component is arranged in the third box body.
3. The battery compartment assembly for an electric vehicle of claim 2, wherein: the first box body at least comprises an N-layer battery pack mounting structure, and the 1 st layer, the 2 nd layer and the N th layer are arranged from the bottom surface of the battery box upwards in sequence, wherein N is more than or equal to 2; each layer of battery pack mounting structure is provided with M battery pack mounting units, wherein M is more than or equal to 3, a first electric connector is arranged in the mounting unit at the middle part of the 1 st layer, and battery packs are arranged in the rest of the mounting units.
4. The battery compartment assembly for an electric vehicle of claim 1, wherein: the top installation height of the first box body is lower than the height of the rear window of the cab, and the downward extending lengths of the second box body and the third box body exceed the bottom support and are not contacted with the ground.
5. The battery compartment assembly for an electric vehicle of claim 1, wherein: the collet includes the outer frame body, and the outer frame body includes first girder, second girder, and first girder and second girder are provided with the frame crossbeam along vehicle length direction parallel arrangement between first girder and the second girder, are provided with one-level guider on first girder, the second girder.
6. The battery compartment assembly for an electric vehicle of claim 5, wherein: the upper surface of the primary guide device is provided with a first guide inclined plane which is inclined inwards upwards from the outer edges of the first main beam and the second main beam; and the first guide inclined plane is provided with a wear-resisting plate.
7. The battery compartment assembly for an electric vehicle of claim 6, wherein: the wear-resisting plate covers the whole first guide inclined plane and extends downwards vertically from the bottom of the first guide inclined plane, and is fixedly connected to the outer side walls of the first main beam and the second main beam respectively; the opposite side surfaces of the second box body and the third box body are respectively contacted with the wear-resisting plates on the outer side walls of the first main beam and the second main beam.
8. The battery compartment assembly for an electric vehicle of claim 5, wherein: the battery box comprises an outer frame body and is characterized in that an inner frame body is arranged in the outer frame body, a secondary guide device is arranged between the outer frame body and the inner frame body, the secondary guide device is of a square columnar structure, a second guide inclined plane is arranged on the upper portion of the secondary guide device, two side faces of the first battery box, which are arranged along the width direction of the vehicle, correspond to the second guide inclined plane, and the second guide inclined plane is inclined inwards from bottom to top.
9. The battery compartment assembly for an electric vehicle of claim 8, wherein: the middle part of second grade guider transversely is provided with first locking device, and first battery case bottom is provided with first crossbeam and second crossbeam along vehicle width direction parallel arrangement, table is provided with the locking piece with first locking device assorted on first crossbeam and the second crossbeam.
10. The battery compartment assembly for an electric vehicle of claim 9, wherein: the second locking device is arranged on the side surface of the second-stage guide device, which is opposite to the outer frame cross beam, and is respectively abutted against the first cross beam and the second cross beam at the bottom of the first battery box;
the second-stage guide device is provided with a third locking device along the opposite side surfaces of the length direction of the outer frame cross beam, the bottom of the first battery box is provided with a first longitudinal beam and a second longitudinal beam in parallel along the length direction of the vehicle, and the third locking device is respectively abutted with the first longitudinal beam and the second longitudinal beam;
the second locking device and the third locking device are elastic reeds.
11. The battery compartment assembly for an electric vehicle of claim 10, wherein: the middle part of the inner frame body is provided with a plurality of supporting beams, and the second electric connector is arranged on the supporting beams; three-stage guiding and positioning devices are arranged between the inner frame body and the outer frame body, the three-stage guiding and positioning devices are arranged along the width direction of the vehicle and are positioned between the two-stage guiding devices, and positioning holes corresponding to the three-stage guiding and positioning devices are formed in the bottom surface of the battery box.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310986622.5A CN116691310A (en) | 2023-08-08 | 2023-08-08 | Battery box assembly for electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310986622.5A CN116691310A (en) | 2023-08-08 | 2023-08-08 | Battery box assembly for electric vehicle |
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| CN116691310A true CN116691310A (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310986622.5A Pending CN116691310A (en) | 2023-08-08 | 2023-08-08 | Battery box assembly for electric vehicle |
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| CN117183809A (en) * | 2023-09-07 | 2023-12-08 | 北京玖行智研交通科技有限公司 | Battery box for electric vehicle |
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Application publication date: 20230905 |