CN115295942A - Lower box body of battery box, battery pack and electric automobile - Google Patents
Lower box body of battery box, battery pack and electric automobile Download PDFInfo
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- CN115295942A CN115295942A CN202111668441.5A CN202111668441A CN115295942A CN 115295942 A CN115295942 A CN 115295942A CN 202111668441 A CN202111668441 A CN 202111668441A CN 115295942 A CN115295942 A CN 115295942A
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
-
- 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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/231—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
-
- 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
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
- H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
-
- 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
- H01M50/271—Lids or covers for the racks or secondary casings
- H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
- H01M50/282—Lids or covers for the racks or secondary casings characterised by the material having a layered structure
-
- 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)
- Manufacturing & Machinery (AREA)
- Aviation & Aerospace Engineering (AREA)
- Battery Mounting, Suspending (AREA)
- Connection Or Junction Boxes (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention discloses a lower box body of a battery box, the battery pack and an electric automobile, wherein the lower box body of the battery box is used for forming the battery pack, the lower box body is made of a non-metal composite material, the lower box body is provided with a bottom plate and a side wall arranged around the edge of the bottom plate, a reinforcing structure is arranged on the outer peripheral surface of the side wall, the side wall forms the reinforcing structure through outward extension, and a plurality of mounting structures used for mounting a connecting mechanism are arranged on the reinforcing structure. This lower box is made by non-metallic composite, and for the lower box of metal material, the heat preservation effect is better, more is applicable to the cold district and uses to weight is lighter. The lower box body is provided with a reinforcing structure by extending the side wall outwards, so that the strength of the side wall is enhanced, a mounting structure is convenient to arrange on the reinforcing structure, and a connecting mechanism is further convenient to mount and is used for connecting battery pack accessories (such as a quick-change unit or a battery pack fixing unit).
Description
The present application claims priority to the chinese patent application 202111567173.8, filed 20/12/2021. The present application refers to the above-mentioned chinese patent application in its entirety.
Technical Field
The invention relates to the field of battery replacement of electric automobiles, in particular to a lower box body of a battery box, a battery pack and an electric automobile.
Background
The electric automobile has the advantages of zero emission, low noise, economical operation and maintenance and the like, and is more and more favored by users. The energy used by the electric automobile is the electric energy provided by the self-carried battery pack, and the electric automobile needs to be charged after the electric energy is used up. The battery pack of the electric vehicle is generally installed in a fixed type or a replaceable type, wherein the fixed type battery pack is generally fixed to the vehicle and the vehicle is directly used as a charging target during charging. The replaceable battery pack is generally fixed to a bracket of the vehicle in a movable mounting manner, and the replaceable battery pack can be removed to be replaced or charged independently and then mounted on the vehicle after the replacement battery pack is charged.
The connecting mechanism of the existing battery box is arranged on the shell of the battery box, so that the shell of the battery box is in a large stress state, and after the battery box is used for a long time, the deformation of the shell of the battery box is easily caused, and the connection is unreliable. And the casing of current battery package is the metal material, leads to battery package heat preservation effect poor, and the temperature of battery package easily changes along with ambient temperature change. Particularly, when the battery pack is used in a cold region, the temperature of the battery core in the battery pack is reduced rapidly when the environmental temperature is low, and the efficiency of the battery pack is reduced more remarkably.
Disclosure of Invention
The invention provides a lower box body of a battery box, a battery pack and an electric automobile, aiming at overcoming the defect that the strength of a shell of the battery box is low and a connecting structure is inconvenient to arrange in the prior art.
The invention solves the technical problems through the following technical scheme:
the utility model provides a lower box of battery box for form the battery package, the box is made by non-metallic composite down, the lower box has the bottom plate and encircles the lateral wall that the bottom plate edge set up, be provided with additional strengthening on the outer peripheral face of lateral wall, the lateral wall forms through outside extension additional strengthening, the last a plurality of mounting structure who are used for installing coupling mechanism that are equipped with of additional strengthening.
In this scheme, this lower box is made by non-metallic composite, and for the lower box of metal material, the heat preservation effect is better, more is applicable to the cold district and uses to weight is lighter. The lower box body is provided with a reinforcing structure by extending the side wall outwards, so that the strength of the side wall is enhanced, a mounting structure is convenient to arrange on the reinforcing structure, and a connecting mechanism is further convenient to mount and is used for connecting battery pack accessories (such as a quick-change unit or a battery pack fixing unit).
Preferably, the reinforcing structure includes a first reinforcing portion, a second reinforcing portion and a plurality of external reinforcing ribs, the first reinforcing portion and the second reinforcing portion are arranged around the side wall at intervals one above the other, and the plurality of external reinforcing ribs are arranged between the first reinforcing portion and the second reinforcing portion at intervals along the circumferential direction of the side wall.
In this scheme, the intensity of box lateral wall under first rib and second rib are strengthened in the circumference direction, and outside strengthening rib is established between first rib and second rib to strengthen the intensity of lateral wall in vertical direction. Adopt above-mentioned structural style, the reinforcing is the intensity of box lateral wall in hoop and vertical direction down, is favorable to the lightweight of box structure down moreover.
Preferably, the space between the first reinforcing part and the second reinforcing part is divided into a plurality of areas by the external reinforcing ribs, and the areas are filled with light heat-insulating materials.
In this scheme, the space that utilizes the additional strengthening to form carries out light insulation material's packing, helps promoting the thermal insulation performance of box down. Lightweight insulating materials include, but are not limited to: polymeric foam, aerogel blanket, and the like. The polymer foam material refers to a microcellular material based on a polymer (plastic, rubber, elastomer, or natural polymer material) having innumerable cells therein, and is typically a polymer foam material such as Polyurethane (Polyurethane) foam, polystyrene (Polystyrene) foam, or the like. Preferably, the polymer foam material is polyurethane foam.
Preferably, the inner side surface of the bottom plate is provided with internal reinforcing ribs which are arranged at intervals or in a staggered manner;
or the inner side surface of the bottom plate and the inner side surface of the side wall are provided with internal reinforcing ribs which are arranged at intervals or in a staggered mode.
In this embodiment, the internal reinforcing ribs may be provided only on the inner side surface of the bottom plate, or may be provided on both the inner side surface of the bottom plate and the inner side surface of the side wall. The bottom plate (and the side wall) of the lower box body can be reinforced through the arrangement. The inboard inside strengthening rib of box and outlying additional strengthening have promoted the bulk strength of box down under utilizing, also be convenient for simultaneously form the cavity in inside between the strengthening rib and/or additional strengthening's frame, more can place insulation material in the cavity to improve the heat preservation effect of box down.
Preferably, at least a portion of the outer reinforcing beads is disposed at a position corresponding to the inner reinforcing beads.
In this scheme, the corresponding additional strengthening of inside and outside formation of box under promotes the holistic intensity of box down.
Preferably, the mounting structure comprises a containing hole and a placing groove which are arranged in the reinforcing structure, the containing hole is communicated with the placing groove, and the containing hole is provided with one end which is open to the outer surface of the reinforcing structure; the accommodating hole and the accommodating groove are respectively used for installing a connecting piece and a locking piece which form the connecting mechanism, so that the connecting piece is connected with the locking piece in the accommodating groove through the accommodating hole.
In this scheme, adopt above-mentioned structural style, be convenient for install retaining member and connecting piece.
Preferably, the number of the containing holes is several, and each containing hole is provided with one end which is open to the outer surface of the side part of the reinforcing structure;
or the number of the containing holes is several, part of the containing holes are provided with one ends which are open to the outer surfaces of the side parts of the reinforcing structure, and the rest part of the containing holes are provided with one ends which are open to the outer surfaces of the bottom part of the reinforcing structure.
In this scheme, the mounting structures in the two forms can realize the connection of the quick-change unit or the battery pack fixing unit from the side surface by matching with the connecting piece and the locking piece, or realize the connection of the quick-change unit or the battery pack fixing unit from the side surface and the bottom surface. When the quick-change unit or the battery pack fixing unit is connected to the battery box through the structural member of the L-shaped plate, the two parts of the L-shaped plate are respectively and fixedly connected with the side surface and the bottom of the reinforcing structure through the mounting structures in the two forms by utilizing the connecting piece and the locking piece, so that the effect of more stable connection can be achieved. And the connecting pieces of the two forms are arranged at a certain included angle (preferably perpendicular to each other), so that the quick-change unit can be fixed from two directions, and the reliability is higher.
Preferably, the connecting member comprises a screw connecting member, and the locking member comprises a nut locking member for threaded connection with the screw connecting member.
In this scheme, adopt screw rod connecting piece and nut locking piece, simple structure connects convenience, reliably. The screw rod connector can be a bolt, a screw and the like with a screw rod. The nut locking piece comprises common nuts such as common hexagonal nuts and square nuts, or special nuts such as expansion nuts.
Preferably, the receiving hole serves as a placement groove for mounting the locker at least at a portion of an inner side surface in an axial direction thereof.
In this scheme, with the partial or whole inside surface of holding hole along its axial direction upwards as the standing groove to place retaining member (nut retaining member preferably inflation nut) wherein, compress tightly fixedly through the mode of inflation or embedding and holding hole in the holding hole, the installation is quick, convenient, and simplify connection structure.
Preferably, the placing groove is formed by the preset locking piece and the reinforcing structure together and used for fixing the preset locking piece.
In this scheme, adopt above-mentioned structural style, when the box was down in the nut was made, adopt pre-buried mode to form pre-buried nut and predetermine in the box down, the shaping cladding is in placing the chamber of nut simultaneously. During the use, can reduce movable part's setting, easy dismounting through bolt lug connection to on the embedded nut.
Preferably, the placing groove is provided with a placing opening which is opened to the outer surface of the reinforcing structure, the placing opening is used for placing the locking member in the placing groove, and an activity space which is used for moving the locking member in a direction which is perpendicular to the connecting direction of the locking member and the connecting member is arranged in the placing groove.
In this scheme, the adoption has the standing groove of placing the mouth to place the retaining member of certain activity degree of freedom in the standing groove, because the retaining member is installed after the box is made down, and the retaining member can have certain activity degree of freedom in holding the chamber, convenient assembling has reduced the requirement to lower box machining precision, can avoid the harm to the forming die surface that pre-buried retaining member probably caused moreover.
Preferably, the top surface of the reinforcing structure is provided with a sealing groove, the sealing groove is used for embedding a sealing strip for sealing the upper cover of the battery box and the lower box body, and the placing opening of the placing groove is located in the sealing groove.
In this scheme, adopt above-mentioned structural style, utilize the retaining member, can be fixed in the additional strengthening with quick change unit from the side on. This structural style is convenient for install the retaining member to the deep position in the additional strengthening, and can not cause great influence to the structure of lower box, and the retaining member can not expose moreover, has improved the reliability.
Preferably, the bottom of the groove of the sealing groove is provided with a plurality of in-groove reinforcing ribs, the length direction of the in-groove reinforcing ribs is perpendicular to the length direction of the sealing groove, the placing openings of the placing groove are formed in the bottom of the groove between two adjacent in-groove reinforcing ribs in the sealing groove, and the number of the placing openings between the adjacent in-groove reinforcing ribs is not more than two.
Preferably, the reinforced structure is internally provided with two oppositely arranged holding arms, the tail ends of the holding arms are provided with inwards-turned clamping portions, the holding arms and the clamping portions form the placing groove, the placing groove is provided with a lateral opening leading to the outer surface of the reinforced structure, and the lateral opening is used for forming the placing opening.
In this scheme, above-mentioned structural style's standing groove sets up in additional strengthening, sets up the standing groove in above-mentioned space, need not to set up hole or groove in addition again to improve economic benefits, and simple to operate.
Preferably, be equipped with in the standing groove and be used for the connecting piece to be connected with the retaining member and restrict the restraint muscle of retaining member activity, the restraint muscle is formed on two relative lateral walls in the standing groove, and with retaining member looks butt, just the restraint muscle reduces from its place lateral wall to retaining member width gradually.
In this scheme, the restraint muscle can carry out preliminary restraint and location to the nut of putting into the standing groove, and the nut that can avoid putting into falls out. The structure that the side wall is gradually thinned to the locking piece is adopted, so that the nut can be allowed to have a small amount of clearance in the screwing process, and the movement of the nut is realized.
Preferably, the lower box body further comprises a connecting plate, the connecting plate is connected with the mounting structure through a connecting mechanism, the connecting plate is fixed to the side face of the lower box body, and the connecting plate is used for connecting a quick-change unit or a battery pack fixing unit.
In this scheme, through set up the connecting plate on additional strengthening to set up quick change unit or battery package fixed unit on the connecting plate, thereby realize battery package and electric automobile's the quick connection that can dismantle or realize with electric automobile's fixed connection, the setting of connecting plate, when making battery package pass through quick change unit or battery package fixed unit and be connected with electric automobile, the atress is more balanced, connects more firmly.
Mounting structure comes installation coupling mechanism, can be fixed the quick change unit of battery package under on the box be convenient for contain the battery package of this lower box can dismantle be connected to electric automobile on, or fix the battery package fixed unit under on the box to be convenient for contain the battery fixed connection of this lower box on electric automobile, and this lower box is made by non-metallic composite material, compare with the casing of metal material and can lighten weight, and have good heat preservation effect.
Preferably, the connecting plate is an L-shaped connecting plate, the L-shaped connecting plate has a longitudinal connecting portion and a transverse connecting portion, the longitudinal connecting portion and the transverse connecting portion are perpendicular to each other, the longitudinal connecting portion is connected with the side surface of the reinforcing structure, and the transverse connecting portion is connected with the bottom surface of the reinforcing structure.
In this scheme, adopt above-mentioned structural style, L type connecting plate can be connected with additional strengthening from two directions, improves and connects fixed effect.
Preferably, the bottom surface of the lower box body is provided with a concave surface, and the concave surface is used for installing the transverse connecting part.
In this scheme, through setting up the depressed face, form the step face with the other parts of bottom plate between to dodge the transverse connection portion of L type connecting plate, when transverse connection portion installs to the depressed face on, can ensure that the bottom surface of battery box is level and smooth.
Preferably, glue coating grooves are formed in the side surface and/or the bottom surface of the reinforcing structure and used for coating glue so as to bond and fix the connecting plates.
In this scheme, adopt above-mentioned structural style, reinforcing connecting plate and additional strengthening's fixed effect of being connected, and simple to operate.
Preferably, the lower box body further comprises an inner shell, the inner shell is stacked in the lower box body, reinforcing ribs are arranged between the inner shell and the lower box body, and a cavity structure is formed between the inner shell and the lower box body.
In this scheme, adopt above-mentioned structural style, because interior casing stacks in the box down, form composite construction for the intensity of box is further strengthened down, also improves the heat preservation effect of battery simultaneously. In addition, set up the strengthening rib between inner casing and the lower box for the structure of lower box has obtained the reinforcement, satisfies the intensity requirement of battery box. Meanwhile, the cavity structure improves the heat insulation effect of the lower box body.
The utility model provides a battery pack, its lower box that includes upper cover, battery cell, battery pack linkage unit and foretell battery box, the box has the chamber that holds of upper end open-ended down, battery cell install in hold the chamber, the upper cover lid is located down on the box and will hold the chamber and seal, battery pack linkage unit is fixed in on the additional strengthening, battery pack linkage unit includes quick change unit and battery pack fixed unit.
In this scheme, this battery package closes the cell (directly form by a plurality of electric core combinations do not have the module form, or constitute through a plurality of battery module that constitute by electric core) and holds the intracavity that upper cover and lower box body enclose, forms the protection protective screen and has the heat preservation effect to the cell. In addition, the lower box body of the battery pack is made of a non-metal composite material, so that the weight of the battery pack can be reduced compared with that of a shell made of a metal material, and the heat preservation effect and the economic benefit are further improved.
Wherein, quick change unit includes but not limited to: the electric/liquid cooling connector comprises an electric/liquid cooling connector, a locking mechanism and the like, wherein the locking mechanism comprises a thread locking mechanism (a locking mechanism for fixing a battery box and a vehicle body through a plurality of bolts), a lock pin locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a lock pin locking mode), a rotary locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a rotary locking mode), an overturning locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through an overturning locking mode), a jacking locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a jacking locking mode), a staggered tooth locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a staggered tooth locking mode), a bolt locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a bolt locking mode), and a push-pull locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a push-pull locking mode).
The battery pack fixing unit includes a bolt-type locking mechanism or other types of fixedly-connected mechanisms (including but not limited to mechanical, electrical or magnetic connection type, etc.), and the like. An electric vehicle comprising a battery pack as described above.
In this scheme, through the fixed unit of suitable quick change unit of installation or battery package for the battery package can be used to the electric automobile of types such as quick change electric automobile (battery package detachably connects in the automobile body, can carry out quick car electricity separation), chargeable type electric automobile (battery package is fixed in the automobile body, charges as main ability means with loading on the automobile body), the electric automobile that has quick change and the function of charging concurrently.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: this lower box is made by non-metallic composite, and for the lower box of metal material, the heat preservation effect is better, more is applicable to the cold district and uses to weight is lighter. The box is through outwards extending the lateral wall and forming additional strengthening down, strengthens the intensity of lateral wall, is convenient for set up mounting structure on this additional strengthening, the installation coupling mechanism of further being convenient for battery package accessory's connection.
Drawings
Fig. 1 is a schematic structural view of a hidden inner case of a lower case of a battery case according to embodiment 1.
Fig. 2 is a partial structural schematic view of a sealing groove of a lower case of a battery case according to embodiment 1.
Fig. 3 is a schematic structural view of a placement groove of a lower case of the battery box of embodiment 1.
Fig. 4 is a schematic view showing another receiving groove for hiding the locker of embodiment 1.
Fig. 5 is a schematic structural view of a battery box according to embodiment 1.
Fig. 6 is a partial sectional view schematically showing the structure of the battery case of embodiment 1.
Fig. 7 is an enlarged view of a receiving hole of the lower case of the battery case of embodiment 2.
Fig. 8 is an exploded view of the upper case lid of the battery case of the test example.
Description of reference numerals:
Reinforcing structure 121
Constraining ribs 12151
In-groove stiffener 1218
Clamping part 123
Connecting piece 101
Retaining member 102
Connecting plate 2
Longitudinal connecting part 21
Battery box 10
Case cover housing 11a
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.
Example 1
As shown in fig. 1 to 6, the present embodiment discloses a lower case of a battery case for forming a battery pack. The lower case 1 has a bottom plate 11 and a side wall 12 disposed around the edge of the bottom plate 11, a reinforcing structure 121 is disposed on the outer circumferential surface of the side wall 12, and the side wall 12 forms the reinforcing structure 121 by extending outward, so as to enhance the strength of the side wall 12, facilitate disposing a mounting structure on the reinforcing structure 121, and further facilitate mounting a connecting mechanism for connecting a battery pack accessory (such as a quick-change unit or a battery pack fixing unit). When the quick change unit is installed on the installation structure, the battery pack is mainly hung at the bottom of the electric automobile, so that the electric automobile can be conveniently replaced. When the mounting structure is used for mounting the battery pack fixing unit, the mounting structure is mainly used for fixing the battery pack on the electric automobile without disassembly.
More specifically:
further, in this embodiment, the lower case is made of SMC (Sheet molding compound), which is lighter in weight and better in heat preservation effect.
Further, in the present embodiment, as shown in fig. 1 and 4, the reinforcing structure 121 includes a first reinforcing portion 1211, a second reinforcing portion 1212, and a plurality of external reinforcing ribs 1216, the first reinforcing portion 1211 and the second reinforcing portion 1212 are arranged at intervals around the side wall 12 one above the other, and the plurality of external reinforcing ribs 1216 are arranged at intervals between the first reinforcing portion 1211 and the second reinforcing portion 1212 in the circumferential direction of the side wall 12. The first reinforcement portion 1211 and the second reinforcement portion 1212 reinforce the strength of the side wall 12 of the lower case 1 in the circumferential direction. An external bead 1216 is provided between the first reinforcement 1211 and the second reinforcement 1212 to reinforce the strength of the sidewall 12 in the vertical direction. The structural form of the first reinforcement 1211, the second reinforcement 1212 and the plurality of external reinforcing ribs 1216 enhances the strength of the side wall 12 of the lower case 1 in the circumferential and vertical directions, and contributes to the lightweight construction of the lower case 1. Further, in this embodiment, the first reinforcing portion 1211 and the second reinforcing portion 1212 are plate-shaped structures extending horizontally outward, the thickness of the first reinforcing portion 1211 is greater than that of the second reinforcing portion 1212, and the connecting mechanism in the lower case side direction is mainly disposed on the first reinforcing portion 1211 or a solid structure depending on the first reinforcing portion 1211.
As shown in fig. 1, a plurality of external reinforcing ribs 1216 partition a space between the first reinforcing portion 1211 and the second reinforcing portion 1212 into a plurality of regions, which contributes to the improvement of the heat insulating performance of the lower case 1. Further, in the present embodiment, each area is generally rectangular parallelepiped.
As shown in fig. 1, in the present embodiment, the inside surface of the bottom plate 11 and the inside surface of the side wall 12 are provided with internal reinforcing ribs 1217 arranged alternately. Utilize box 1 inboard inside strengthening rib 1217 and peripheral additional strengthening 121 down, promoted box 1's bulk strength down, also be convenient for simultaneously between inside strengthening rib 1217 and additional strengthening 121's frame form the cavity, more can place insulation material in the cavity to improve box 1's heat preservation effect down. Further, the internal reinforcing ribs 1217 are arranged crosswise on the bottom surface of the lower case, and only the vertical reinforcing ribs are provided on the side surfaces of the lower case.
As shown in fig. 1, further, in the present embodiment, a portion of the external bead 1216 is disposed at a position corresponding to the internal bead 1217 to form a corresponding reinforcing structure inside and outside the lower case 1, thereby enhancing the strength of the entire lower case 1.
Further, in the present embodiment, the reinforcing structure 121 is provided with a plurality of mounting structures for mounting the connecting mechanism.
Further, as shown in fig. 1 and 3, the mounting structure includes a receiving hole 1214 and a placing groove 1215 provided in the reinforcing structure 121, the receiving hole 1214 communicating with the placing groove 1215, and the receiving hole 1214 having one end opening to the outer surface of the reinforcing structure 121; the receiving holes 1214 and the placing groove 1215 are used to mount the coupling member 101 and the locker 102, which constitute the coupling mechanism, respectively, such that the coupling member 101 is coupled with the locker 102, which is placed in the placing groove 1215, through the receiving holes 1214. The receiving holes 1214 are formed in several numbers, each receiving hole 1214 having one end opened to the outer surface of the side portion of the reinforcing structure 121, and the coupling member 101 is coupled to the locker 102 in the placing groove 1215 through the receiving hole 1214.
Further, in the present embodiment, the number of the receiving holes is several, and a part of the receiving holes has one end opened to the side outer surface of the reinforcing structure, and the remaining part of the receiving holes has one end opened to the bottom outer surface of the reinforcing structure. The mounting structure can be used for simultaneously connecting the quick-change units from the side surface and the bottom surface by matching with the connecting piece and the locking piece. When the quick-change unit is connected to the battery box through the structural part of the L-shaped plate, the longitudinal connecting plate (attached to the side surface of the reinforcing structure) and the bottom extension plate (downwards overturned to surround the bottom surface edge of the lower box body) of the L-shaped plate can be fixedly connected with the side surface and the bottom of the reinforcing structure through the mounting structures in the two forms by using the connecting piece and the locking piece, so that the effect of more stable connection can be achieved. And the connecting pieces in the two forms are mutually vertical, so that the quick-change unit can be fixed from two directions, and the reliability is higher.
As shown in fig. 2, 4 and 6, the connecting member 101 comprises a screw connecting member, and the locking member 102 comprises a nut locking member for screw-coupling with the screw connecting member. In this embodiment, adopt screw rod connecting piece and nut locking piece, simple structure connects the convenience, and is reliable. Further, the screw connector is a connector 101 with a screw such as a bolt, a screw, or the like. The nut locking part adopts a square nut. The square nut may minimize the rotation of the nut connector within the placement channel 1215 after placement of the nut connector within the placement channel 1215.
In this embodiment, the adoption has the standing groove 1215 of placing the mouth to place the retaining member of certain activity degree of freedom in standing groove 1215, because the retaining member is installed after box 1 makes down, and the retaining member can have certain activity degree of freedom in holding the chamber, convenient assembling has reduced the requirement to 1 machining precision of lower box, can avoid the harm to the forming die surface that pre-buried retaining member probably caused moreover.
Further, in the present embodiment, one end of the receiving hole 1214 of the mounting structure for fixedly connecting the quick-change unit from the side is open to the outer surface of the side of the reinforcing structure, and further, as shown in fig. 4, is disposed at the position where the first extension 1211 intersects with the external bead 1216, and a thickened structure is disposed at the position exposed to the portion of the external bead 1216 partitioned to form the region, so as to increase the strength of the connection. In this case, the placing groove 1215 of the above-described mounting structure extends downward from the top of the reinforcing structure to communicate with the other end of the receiving hole 1214. By means of the locking element, the quick-change unit can be fixed laterally to the reinforcing structure 121 by means of the mounting structure.
As shown in fig. 1, 2 and 3, further, in the present embodiment, the top surface of the reinforcing structure 121 is provided with a sealing groove 1213, the sealing groove 1213 is used for embedding a sealing strip for sealing the upper cover 3 of the battery box 10 with the lower box 1, and the placement opening of the placement groove 1215 is located in the sealing groove 1213. This structural style facilitates the installation of the locking member to a deeper position in the reinforcing structure 121, and does not cause a great influence on the structure of the lower case 1, and the locking member 102 is not exposed, improving the reliability.
As shown in fig. 2, further, a plurality of in-groove reinforcing ribs 1218 are disposed at the bottom of the sealing groove 1213, the length direction of the in-groove reinforcing ribs 1218 is perpendicular to the length direction of the sealing groove 1213, the placing openings of the placing grooves 1215 are disposed at the bottom of the groove between two adjacent in-groove reinforcing ribs 1218 in the sealing groove 1213, the number of the placing openings between the adjacent in-groove reinforcing ribs 1218 is not greater than two, and the placing openings are not excessively disposed to affect the strength of the reinforcing structure.
In this embodiment, another form of the holding channel 1215 is shown in FIG. 4, with the nut lock in the holding channel 1215 being hidden from view in order to reveal the configuration of the holding channel 1215. The placing groove 1215 has a placing opening opened to the outer surface of the reinforcing structure 121 for placing a locker (not shown in the drawings) therein, and an activity space for the locker to move in a direction perpendicular to the coupling direction of the locker and the coupling member 101 is provided in the placing groove 1215. By means of the locking element, the quick-change unit can be fixed laterally to the reinforcing structure 121 by means of the mounting structure. Furthermore, the reinforcing structure 121 has two opposite arms 122, the ends of the arms 122 have inward-turned clamping portions 123, the arms 122 and the clamping portions 123 form a placement slot 1215, and the placement slot 1215 has a lateral opening leading to the outer surface of the reinforcing structure 121, and the lateral opening is used for forming a placement opening. The placement groove 1215 is disposed in the reinforcement structure 121 without additional holes or slots, which facilitates installation.
As shown in fig. 3 and 4, the two placing slots 1215 are respectively provided with a restraining rib 12151 for restraining the movement of the locking member 102 before the connecting member 101 is connected with the locking member 102, the restraining ribs 12151 are formed on two opposite side walls 12 in the placing slots 1215 and are abutted against the locking member 102, and the width of the restraining rib 12151 from the side wall 12 where the restraining rib 12151 is located to the locking member 102 is gradually reduced. The constraining ribs 12151 may initially constrain and position the nuts placed in the holding grooves 1215 to prevent the placed nuts from falling out. The movement of the nut is achieved by the configuration of the tapered side walls to the retaining member 102, which allows a small amount of displacement of the nut during tightening.
As shown in fig. 6, the lower box 1 further includes a connecting plate 2, the connecting plate 2 is connected to the mounting structure through a connecting mechanism, the connecting plate 2 is fixed to a side surface of the lower box 1, and the connecting plate 2 is used for connecting a quick-change unit. In this embodiment, through set up connecting plate 2 on additional strengthening 121 to set up the quick change unit on connecting plate 2, thereby realize battery package and electric automobile's the quick connection that can dismantle, the setting of connecting plate 2, when making the battery package pass through the quick change unit and be connected with electric automobile, the atress is more balanced, connects more firmly. Mounting structure comes installation coupling mechanism, can be fixed the quick change unit of battery package under on box 1 be convenient for contain this battery package of box 1 can dismantle be connected to electric automobile on to be convenient for contain this battery fixed connection of box 1 on electric automobile down, and this box 1 is made by non-metallic composite material down, can lighten weight with the casing of metal material, and has good heat preservation effect.
Further, in the embodiment, as shown in fig. 6, the connecting plates 2 are L-shaped connecting plates 2,L, and the connecting plates 2 have vertical connecting portions 21 and transverse connecting portions 22 perpendicular to each other, the vertical connecting portions 21 are connected to the side surfaces of the reinforcing structure 121, and the transverse connecting portions 22 are connected to the bottom surface of the reinforcing structure 121. L type connecting plate 2 can be connected with additional strengthening 121 from two directions, improves and connects fixed effect.
Further, in the present embodiment, the bottom surface of the lower case 1 is provided with a recessed surface 13, and a step surface is formed between the recessed surface 13 and the other portion of the bottom plate 11, and the recessed surface 13 is used for installing the transverse connecting portion 22. When the transverse connecting part 22 is installed on the reinforcing structure, the concave surface 13 is arranged to avoid the transverse connecting part 22 of the L-shaped connecting plate 2, so that the bottom surface of the battery box 10 is more flat.
Further, all be equipped with rubber coating groove 14 on the side surface of additional strengthening 121 and the bottom surface, rubber coating groove 14 is used for the rubber coating to it is fixed to bond connecting plate 2, strengthens connecting plate 2 and additional strengthening 121's the fixed effect of being connected, and simple to operate.
As shown in fig. 6, in this embodiment, the lower case 1 further includes an inner housing 15, the inner housing 15 is stacked in the lower case 1, a reinforcing rib is disposed between the inner housing 15 and the lower case 1, and a cavity structure is formed between the inner housing 15 and the lower case 1. In this embodiment, since the inner case 15 is stacked in the lower case 1 to form a composite structure, the strength of the lower case 1 is further enhanced, and the heat insulating effect of the battery is also improved. In addition, a reinforcing rib is arranged between the inner shell 15 and the lower box body 1, so that the structure of the lower box body 1 is strengthened, and the strength requirement of the battery box 10 is met. Meanwhile, the cavity structure improves the heat insulation effect of the lower box body 1, and the lower box body 1 is made of a non-metal composite material, so that the heat insulation performance is further enhanced compared with a shell made of a metal material. Lower box 1 is made by the SMC material in this embodiment, and for box 1 under the metal material, the thermal insulation performance of box 1 is better under the non-metal composite material, and weight ratio metal material box is light, and production technology is simpler, has improved economic benefits.
The embodiment also discloses a battery pack, which comprises an upper cover 3, a battery unit, a battery pack connecting unit and the lower box body 1 of the battery box, wherein the lower box body 1 is provided with a containing cavity with an opening at the upper end, the battery unit is installed in the containing cavity, the upper cover 3 is covered on the lower box body 1 and is sealed by the containing cavity, the battery pack connecting unit is fixed on the reinforcing structure 121, and the battery pack connecting unit comprises a quick-change unit. In the embodiment, the battery pack encloses a battery unit (formed by a plurality of battery modules composed of battery cells) in a containing cavity enclosed by the upper cover 3 and the lower case 1, form a protective barrier for the battery unit and have a heat preservation effect. In addition, the lower box body 1 of the battery pack is made of a non-metal composite material, so that the weight of the battery pack can be reduced compared with a shell made of a metal material, and the heat preservation effect and the economic benefit are further improved.
The embodiment also discloses an electric automobile which comprises the battery pack. The electric automobile is a quick-change electric automobile (the battery pack is detachably connected to the automobile body, and quick vehicle-electricity separation can be carried out).
Example 2
As shown in fig. 7, the present embodiment is substantially the same as embodiment 1 except that, in the present embodiment, at least a part of the inner side surface of the receiving hole 1214 in the axial direction thereof is provided as a placing groove 1215 (i.e., the placing groove 1215 is a part of the receiving hole 1214) for mounting the locker 102. In this embodiment, a part of the inner side surface of the receiving hole 1214 in the axial direction thereof is used as the placing groove 1215, and the locker 102, which is preferably an expansion nut in this embodiment, is placed therein, and is pressed and fixed with the receiving hole 1214 by expansion or insertion in the receiving hole 1214, so that the installation is fast and convenient, and the coupling structure is simplified. However, the mounting structure of example 2 is arranged in a manner that is more cumbersome in the mounting process of the locking member 102 than the mounting structure of example 1, and the expansion nut is also generally heavier in weight than the square nut.
Example 3
The retaining groove accessible is preset retaining member and additional strengthening common shaping for fixed preset retaining member. When the lower box body is manufactured by the nut, the embedded nut is formed in an embedded mode and is preset in the lower box body, and meanwhile, the embedded nut is coated in the placing cavity of the nut in a forming mode. When the novel embedded nut is used, the novel embedded nut can be directly connected to the embedded nut through the bolt, the number of movable parts is reduced, and the novel embedded nut is convenient to assemble and disassemble. However, the fixing form of the mounting structure has relatively high requirements on the machining precision of the lower box body, and the prefabricated nut is easy to damage the forming die of the lower box body.
In addition to the above embodiments, in other embodiments:
the region formed by the external bead 1216 by dividing the space between the first and second reinforcement 1211 and 1212 may be filled with a lightweight insulating material.
The light-weight thermal insulation material includes but is not limited to: polymeric foam, aerogel blanket, and the like. The polymer foam material refers to a microcellular material based on a polymer (plastic, rubber, elastomer, or natural polymer material) having innumerable cells therein, and is typically a polymer foam material such as Polyurethane (Polyurethane) foam, polystyrene (Polystyrene) foam, or the like. Preferably, the light heat-insulating material is aerogel felt.
The inside surface of the floor and/or the inside surface of the side walls may be provided with internal ribs, either spaced or staggered. The internal reinforcing ribs can be only arranged on the inner side surface of the bottom plate, and can also be arranged on the inner side surface of the bottom plate and the inner side surface of the side wall at the same time, so that the bottom plate and the side wall of the lower box body are reinforced.
The inner side of the lower box body can be provided with no inner shell. Under the condition that sets up interior casing, can make the cavity of placing the battery more regular, can also promote the intensity of box down to a certain extent moreover.
The receiving hole 1214 may have only one end open to the side outer surface or the bottom outer surface of the reinforcing structure 121. When the receiving bore 1214 has only one end which opens into the lateral outer surface of the reinforcing structure 121, a connection to the quick-change unit or the battery pack securing unit can be effected from the side. When the receiving bore 1214 has only one end which opens into the bottom outer surface of the reinforcing structure 121, a connection to a quick-change unit or a battery pack securing unit can be realized from the bottom surface.
The connecting plate for connecting the quick-change unit or the battery pack securing unit to the lower case may also have only a longitudinal connecting plate or only a bottom extension plate. In the case of L-shaped panels, the longitudinal connecting panels and the bottom extension panels may assume other included angles.
The screw-type connector of the connector 101 may be a screw-type connector, such as a screw, and the nut lock may be a hexagonal nut, an expansion nut, or the like.
The groove bottom of the sealing groove 1213 may not be provided with the in-groove rib 1218.
The glue slots may be provided on the side surfaces or bottom surface of the reinforcing structure.
A circular relief hole, which may be matched to the lock shaft of the quick-change unit in an area defined by the external bead 1216, connects at least the first and second connectors.
The quick change unit of other structures can also be installed on the additional strengthening 121 of lower box, perhaps installs the fixed unit of battery package, and the quick change unit of other structures is used for dismantling with electric automobile and is connected, and the fixed unit of battery package is used for with electric automobile fixed connection. Wherein, other quick change units include but are not limited to: electric/liquid cooled connectors, locking mechanisms (battery pack ends), etc. The electric/liquid cooling connector comprises an electric connector and/or a liquid cooling connector, the electric connector is used for being electrically connected with the electric automobile, and the liquid cooling connector is mainly used as an interface for connecting the liquid cooling mechanism and the electric automobile under the condition that the liquid cooling mechanism is used in the battery pack to cool the battery pack, so that the safety is improved. The locking mechanism (battery pack end) comprises a thread locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a plurality of bolts), a lock pin locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a lock pin locking mode), a rotary locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a rotary locking mode), a turnover locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a turnover locking mode), a jacking locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a jacking locking mode), other types of staggered tooth locking mechanisms (a locking mechanism for fixing the battery box and the vehicle body through a staggered tooth locking mode), a bolt locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a bolt locking mode), a push-pull locking mechanism (a locking mechanism for fixing the battery box and the vehicle body through a push-pull locking mode) and the like, and the locking mechanism is arranged at the battery pack end (relative to the vehicle end). The fixing unit includes a bolt-type locking mechanism or other types of fixedly-connected mechanisms (including but not limited to mechanical, electrical or magnetic connection type, etc.), etc.
Through installing suitable quick change unit or battery package fixed unit for the battery package can be used to the electric automobile of types such as quick change electric automobile (battery package detachably connects in the automobile body, can carry out quick car electricity separation), chargeable electric automobile (battery package is fixed in the automobile body, charges as main can supply means with loading on the automobile body), the electric automobile that has quick change and the function of charging concurrently.
The lower box body can also be made of other high-molecular composite materials which are light in weight and have certain strength and high-temperature performance, and preferably, the high-molecular composite materials are fiber reinforced resin matrix composite materials. The fiber-reinforced resin-based composite material may be a carbon fiber-reinforced resin-based composite material, and/or a resin fiber-reinforced resin-based composite material, and/or a ceramic fiber-reinforced resin-based composite material, and/or other types of glass fiber-reinforced resin-based composite materials.
Test examples
At present, a sheet metal battery pack (mica sheets are used as heat insulation materials) is used for a certain quick-change electric automobile, and the weight of the quick-change electric automobile is 371.5kg. A non-metal composite battery pack having the same dimensions (outer dimensions and dimensions of the internal space of the battery case) was prepared.
Utilize non-metallic composite material lower box in embodiment 1, the height of the cavity structure between lower box and the interior casing (namely the distance between the relative surface of lower box and interior casing) is 5mm, the lower box that forms when not placing the aerogel in the cavity structure is marked as non-metallic composite material lower box A, the lower box that forms when placing the aerogel in the cavity structure is marked as non-metallic composite material lower box B, non-metallic composite material lower box A and non-metallic composite material lower box B adopt the mode of buckle lock and upper box lid combination respectively, form non-metallic composite material battery box (can see figure 5), mark as non-metallic composite material battery box A and non-metallic composite material battery box B respectively, pack into battery module and necessary electrical component respectively after form non-metallic composite material battery package A and non-metallic composite material battery package B.
As shown in fig. 8, the non-metal composite upper cover 3 for forming the non-metal composite battery box with the non-metal composite lower case a and the non-metal composite lower case B includes: a tank cover housing 11a, a thermal insulation layer 12a, and a protective layer 13a. The thermal insulation layer 12a and the protective layer 13a are sequentially covered and fixed on one side of the box cover shell 11a facing the lower box body, the box cover shell 11a is made of SMC, the thermal insulation layer 12a is made of aerogel felt with the thickness of 5mm, the protective layer 13a is made of fireproof cloth, the box cover shell 11a and the thermal insulation layer 12a and the protective layer 13a are connected in a structural adhesive bonding mode, a concave-convex structure is arranged on the box cover shell 11a to increase strength, the upper cover 3 and the lower box body are sealed in a U-shaped sealing mode, a concave part is arranged on the side face of the upper cover 3 and matched with a convex part arranged on the side face of the lower box body to form buckling connection (the U-shaped sealing and the buckling connection are shown in figure 6), and the upper cover 3 and the lower box cover are subjected to one-step die pressing to realize buckling of the buckling connection structure.
And testing the non-metal composite material battery pack A, the non-metal composite material battery pack B and the metal plate material battery pack with the same size and specification.
In terms of weight test, the mass of the lower box body B made of the non-metal composite material is 45kg, and the mass of the lower box body made of the sheet metal material (mica sheets are used as the heat insulation material) with the same size specification is 60.4kg. Compared with a box body made of a metal plate material, the weight of the box body B made of a nonmetal composite material is reduced by 25.5%. The weight of the battery box B made of the non-metal composite material is 57.8kg, the weight of the battery box made of the sheet metal material is 70.772kg, and the weight advantage of the battery box made of the non-metal composite material is obvious. Compared with the nonmetal composite material lower box body B, the nonmetal composite material lower box body A lacks the aerogel felt placed in the cavity structure, and the aerogel felt is low in density and low in usage amount, so that the nonmetal composite material lower box body A is equivalent to the nonmetal composite material lower box body B in quality and slightly reduced (almost negligible). In the aspect of the total weight of the battery pack, the total weight of the nonmetal composite material battery pack A and the nonmetal composite material battery pack B is reduced by 2-3% compared with that of a metal plate battery pack, and the weight advantage is obvious.
In the aspect of strength testing, non-metal composite material lower box A and non-metal composite material lower box B and the non-metal composite material upper cover used for forming the composite material non-metal battery box by combining with the non-metal composite material lower box A and the non-metal composite material lower box B all meet GB/T31467.3-2015 part 3 of lithium ion power storage battery pack and system for electric automobile: safety requirements and requirements of strength and the like specified in test methods (1.5 times of the standard can be achieved in actual test). Can be used for electric automobiles.
Thermal insulation performance and heat insulation performance: the initial temperature in the package is 20-30 ℃, the package is placed in an environment of 7-9 ℃ for 600min, the accumulated temperature change rate (accumulated cooling rate) of the single battery core in the package of the non-metal composite material battery package A is lower than 50% of that of the metal plate material battery package (the temperature of the single battery core is measured by optical fibers), and the accumulated temperature change rate of the single battery core in the package of the non-metal composite material battery package B is about 40% of that of the metal plate material battery package. At lower temperature, this advantage is more obvious, uses in the cold district in the north, can guarantee that the temperature of electricity core is under the operating temperature of preferred. And through tests, the nonmetal composite material battery pack A and the nonmetal composite material battery pack B can resist the high temperature of 1000 ℃, and in a test for simulating the ignition of the battery, even if the battery is completely combusted, the nonmetal composite material box body is basically kept in a good condition in the whole test process, and only smoke is generated and open fire is not generated.
The battery cores of the non-metal composite material battery pack A and the non-metal composite material battery pack B are filled with the heat conducting glue in the cavities (the filling height of the heat conducting glue is about 1/3 of the height of the battery), so that the temperature uniformity between the battery cores is improved, and the thermal runaway caused by abnormal temperature of individual battery cores is avoided. And secondly, each battery cell (or a battery module formed by the battery cells) in the battery box is integrated, so that the overall strength of the battery pack is increased. In the case of the non-metal composite material battery pack B, compared with the sheet metal material battery pack, when the battery pack B is charged at a charging current of 40A (SOC is from 0 to 100%) in the same environment, the accumulated temperature of the sheet metal material battery pack B is increased by more than 5 ℃ compared with that of the non-metal composite material battery pack B, compared with the metal plate battery pack, the nonmetal composite battery pack B has the charge capacity higher than 5%, and the uniformity of the maximum temperature difference (obtained by recording the temperatures of all positive and negative electrode lugs) inside the box body of the nonmetal composite battery pack is maintained at 1.5-2 ℃. This not only is relevant with having used heat-conducting glue, still is higher than the sheet metal material with SMC's specific heat capacity and thermal insulation performance and is relevant, and above-mentioned factor makes the nonmetal combined material battery package of this application more have the advantage than the sheet metal material battery package in the aspect of avoiding the thermal runaway.
The properties of some of the raw materials used in the above test examples are as follows:
SMC meets the following performance requirements: the tensile strength of the material grade (disordered glass fiber state) is more than or equal to 70Mpa (GB/T1447-2005), the bending strength is more than or equal to 160Mpa (GB/T1449-2005), and the impact toughness is more than or equal to 55KJ/m 2 (GB/T1451-2005) and the elongation at break is more than or equal to 1.3% (GB/T1447-2005).
The aerogel blanket had a density of about 0.16mg/cm 3 。
The shear strength (anodic alumina-anodic alumina) of the structural adhesive is more than or equal to 6MPa, the tensile strength is more than or equal to 5MPa, and the flame retardant grade is V0.
The SMC, the aerogel felt and the structural adhesive can be a commercial product or a self-made product meeting the performance requirements, and the rest materials are commercial products.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (22)
1. The utility model provides a lower box of battery box for form the battery package, its characterized in that, the box is made by non-metallic composite down, the lower box has the bottom plate and encircles the lateral wall that the bottom plate edge set up, be provided with additional strengthening on the outer peripheral face of lateral wall, the lateral wall forms through outside extension additional strengthening, the last a plurality of mounting structure who are used for installing coupling mechanism that are equipped with of additional strengthening.
2. The lower case of the battery case according to claim 1, wherein the reinforcing structure includes a first reinforcing portion, a second reinforcing portion, and a plurality of external reinforcing ribs, the first reinforcing portion and the second reinforcing portion are disposed around the sidewall at intervals one above the other, and the plurality of external reinforcing ribs are disposed between the first reinforcing portion and the second reinforcing portion at intervals in a circumferential direction of the sidewall.
3. The lower case of the battery case according to claim 2, wherein the plurality of external reinforcing ribs partition a space between the first reinforcing part and the second reinforcing part into a plurality of regions, and the regions are filled with a lightweight thermal insulating material.
4. The lower case of the battery case according to claim 2, wherein the inner side surface of the bottom plate is provided with internal reinforcing ribs arranged at intervals or in a staggered manner;
or the inner side surface of the bottom plate and the inner side surface of the side wall are provided with internal reinforcing ribs which are arranged at intervals or in a staggered mode.
5. The lower case of battery case according to claim 4, wherein at least a portion of the external bead is disposed at a position corresponding to the internal bead.
6. The lower case of the battery case as set forth in claim 1, wherein the mounting structure includes a receiving hole and a placing groove provided in the reinforcing structure, the receiving hole communicating with the placing groove, and the receiving hole having one end opened to an outer surface of the reinforcing structure; the accommodating holes and the placing grooves are respectively used for installing connecting pieces and locking pieces which form the connecting mechanism, so that the connecting pieces are connected with the locking pieces which are positioned in the placing grooves through the accommodating holes.
7. The lower case of the battery case as set forth in claim 6, wherein the receiving holes are formed in a number of pieces, each having one end opened to the outer surface of the side portion of the reinforcing structure;
or the number of the containing holes is several, part of the containing holes are provided with one ends which are open to the outer surfaces of the side parts of the reinforcing structure, and the rest part of the containing holes are provided with one ends which are open to the outer surfaces of the bottom part of the reinforcing structure.
8. The lower case of the battery box according to claim 6, wherein the connecting member comprises a screw connecting member, and the locking member comprises a nut locking member for screw-coupling with the screw connecting member.
9. The lower case of battery box according to claim 6, wherein the receiving hole is formed as a receiving groove at least a part of an inner side surface in an axial direction thereof for receiving the locker.
10. The lower case of the battery box as claimed in claim 6, wherein the receiving groove is formed with the reinforcing structure by a preset locking member for fixing the preset locking member.
11. The lower case of the battery box as claimed in claim 6, wherein the receiving groove has a receiving opening opened to an outer surface of the reinforcing structure for receiving the locker in the receiving groove, and the receiving groove has a space for movement of the locker in a direction perpendicular to a coupling direction of the locker with the coupling member.
12. The lower case body of the battery case according to claim 11, wherein a sealing groove is formed on a top surface of the reinforcing structure, the sealing groove is used for embedding a sealing strip for sealing an upper cover of the battery case with the lower case body, and a placing opening of the placing groove is located in the sealing groove.
13. The lower case body of the battery case as set forth in claim 12, wherein a plurality of in-groove reinforcing ribs are provided at the bottom of the groove of the sealing groove, the length direction of the in-groove reinforcing ribs is perpendicular to the length direction of the sealing groove, the placing opening of the placing groove is provided at the bottom of the groove between two adjacent in-groove reinforcing ribs in the sealing groove, and the number of the placing openings between the adjacent in-groove reinforcing ribs is not more than two.
14. The lower box body of the battery box as claimed in claim 11, wherein the reinforcing structure has two opposite arms therein, the ends of the arms have inward-turned clipping portions, the arms and the clipping portions form the placing slot, and the placing slot has a lateral opening leading to the outer surface of the reinforcing structure, and the lateral opening is used for forming the placing opening.
15. The lower box body of the battery box as claimed in claim 11 or 14, wherein a constraining rib for constraining the movement of the locking member before the connecting member is connected with the locking member is provided in the placing groove, the constraining rib is formed on two opposite side walls in the placing groove and abuts against the locking member, and the width of the constraining rib is gradually reduced from the side wall where the constraining rib is provided to the locking member.
16. The lower case of the battery box according to claim 1, further comprising a connection plate connected to the mounting structure through a connection mechanism, the connection plate being fixed to a side of the lower case, the connection plate being adapted to connect to a quick-change unit or a battery pack fixing unit.
17. The lower case of the battery case as set forth in claim 16, wherein the connecting plate is an L-shaped connecting plate having a longitudinal connecting portion and a lateral connecting portion perpendicular to each other, the longitudinal connecting portion being connected to a side surface of the reinforcing structure, and the lateral connecting portion being connected to a bottom surface of the reinforcing structure.
18. The lower case of the battery case as set forth in claim 17, wherein the lower case has a recessed surface on a bottom surface thereof for mounting the lateral connection part.
19. The lower case body of the battery box according to claim 16, wherein glue applying grooves are provided on the side surface and/or the bottom surface of the reinforcing structure, and the glue applying grooves are used for applying glue to adhesively fix the connecting plates.
20. The lower case of the battery case according to any one of claims 1 to 14, further comprising an inner case stacked in the lower case, wherein a reinforcing rib is provided between the inner case and the lower case, and a cavity structure is formed between the inner case and the lower case.
21. A battery pack, characterized in that it comprises an upper cover, a battery unit, a battery pack connection unit and the lower case of the battery box of any one of claims 1-20, the lower case has a receiving cavity with an upper end opening, the battery unit is mounted in the receiving cavity, the upper cover is disposed on the lower case and closes the receiving cavity, the battery pack connection unit is fixed on the reinforcing structure, and the battery pack connection unit comprises a quick-change unit and a battery pack fixing unit.
22. An electric vehicle characterized in that the electric vehicle comprises the battery pack according to claim 21.
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| CN202123456433.2U Active CN217281110U (en) | 2021-12-20 | 2021-12-31 | Connector reinforcing structure and battery box comprising same |
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| CN202111668204.9A Pending CN115312930A (en) | 2021-12-20 | 2021-12-31 | Box body assembly of battery pack and battery pack assembly comprising same |
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| CN202123456676.6U Active CN217881776U (en) | 2021-12-20 | 2021-12-31 | Upper box cover of battery box, battery pack and electric automobile |
| CN202123456076.XU Active CN217903298U (en) | 2021-12-20 | 2021-12-31 | Battery box subassembly, battery package and electric automobile |
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| WO2023116732A1 (en) * | 2021-12-20 | 2023-06-29 | 奥动新能源汽车科技有限公司 | Lower box body of battery box, and battery pack and electric vehicle |
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| CN118263594A (en) * | 2022-12-26 | 2024-06-28 | 标致雪铁龙汽车股份有限公司 | Battery pack assembly for vehicle and vehicle |
| CN117335084B (en) * | 2023-12-03 | 2024-02-09 | 昆山盛夏复合材料科技有限公司 | New energy battery shell with high sealing performance |
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| CN217903297U (en) | 2022-11-25 |
| CN115566337A (en) | 2023-01-03 |
| CN217281110U (en) | 2022-08-23 |
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