CN113690525B - Battery pack lower shell and battery pack with same - Google Patents
Battery pack lower shell and battery pack with same Download PDFInfo
- Publication number
- CN113690525B CN113690525B CN202110885165.1A CN202110885165A CN113690525B CN 113690525 B CN113690525 B CN 113690525B CN 202110885165 A CN202110885165 A CN 202110885165A CN 113690525 B CN113690525 B CN 113690525B
- Authority
- CN
- China
- Prior art keywords
- battery pack
- supporting
- lower shell
- battery
- lower case
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- 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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a battery pack lower shell and a battery pack with the same, wherein the battery pack lower shell comprises a lower shell part and a plurality of supporting beams, the lower shell part forms an open accommodating cavity, a plurality of concave diversion trenches are arranged on the bottom wall of the accommodating cavity, the extending directions of the plurality of supporting beams are arranged at angles with the extending directions of the diversion trenches, the plurality of supporting beams are connected in the accommodating cavity so as to divide the accommodating cavity into a plurality of sub-cavities, the sub-cavities are suitable for arranging battery modules, a first reinforcing protrusion is arranged on one side of each supporting beam, which faces the diversion trench, and the first reinforcing protrusion stretches into the diversion trench. According to the lower shell of the battery pack, when the liquid cooling system in the battery pack leaks or the water in the battery pack enters, the plurality of diversion grooves on the bottom wall of the accommodating cavity can divert the liquid to a specific position to prompt a user in time, so that the safety of the battery module is improved, and the plurality of supporting beams are arranged in the accommodating cavity and used for enhancing the structural strength of the lower shell of the battery pack so as to effectively protect the battery module.
Description
Technical Field
The invention belongs to the technical field of battery packs, and particularly relates to a battery pack lower shell and a battery pack with the battery pack lower shell.
Background
The battery pack mainly comprises a battery pack lower shell, a battery pack upper shell, a battery module, a high-voltage electric device system and a thermal management system, wherein the battery module, the high-voltage electric device system and the thermal management system are arranged in the battery pack lower shell, the battery pack lower shell mainly plays a role in protecting the battery module, the high-voltage electric device system and the thermal management system, therefore, the battery pack lower shell is one of core parts of the battery pack, and the overall performance of the battery pack is directly determined by the structural strength and the stability of the battery pack lower shell.
In the prior art, in order to increase the structural strength of the lower shell, the lower shell of the battery pack is generally thickened, and the lower shell of the battery pack is made of a material with higher strength and poorer ductility, so that the whole weight of the lower shell of the battery pack is heavy, and the manufacturing difficulty is increased; moreover, in order to effectively protect components arranged inside the battery pack, the battery pack is generally formed into a closed structure, so that when the liquid cooling system inside the battery pack leaks, electrolyte leaks or the battery pack shell breaks to cause water inflow inside the battery pack, a user cannot find the water in time, and the safety of the battery module is reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the battery pack lower shell which has high structural strength and is easy to process, and can be found in time when liquid leakage occurs, so that the safety is improved, and the technical problems of heavy weight, high manufacturing difficulty and low safety of the battery pack lower shell in the prior art are solved.
The invention also aims to provide a battery pack with the battery pack lower shell.
According to an embodiment of the invention, a battery pack lower case includes: the lower shell part forms an open accommodating cavity, and a plurality of concave diversion trenches are arranged on the bottom wall of the accommodating cavity; the plurality of supporting beams are arranged in an angle with the extending direction of the diversion trench; the supporting beams are connected in the accommodating cavity so as to divide the accommodating cavity into a plurality of sub-cavities, and the sub-cavities are suitable for arranging the battery modules; one side of the supporting beam, which faces the diversion trench, is provided with a first reinforcing protrusion, and the first reinforcing protrusion extends into the diversion trench.
According to the battery pack lower shell, the plurality of guide grooves are formed in the bottom wall of the accommodating cavity, when liquid leakage of the liquid cooling system in the battery pack, leakage of electrolyte or internal water inflow caused by breakage of the battery pack shell occur, the guide grooves are used for guiding the liquid to a specific position to prompt a user in time, safety of a battery module is improved, the plurality of support beams are arranged in the accommodating cavity, the structural strength of the battery pack lower shell is enhanced while manufacturing difficulty of the battery pack lower shell is not increased, the battery pack lower shell can effectively protect the battery module, service life of the battery module is prolonged, first reinforcing protrusions matched with the guide grooves are arranged on the plurality of support beams and used for limiting positions of the plurality of support beams, and assembly difficulty is reduced. The battery pack lower shell has high structural strength and light weight, and can improve the safety of the battery module.
According to the battery pack lower shell, the diversion trenches extend along the length direction of the lower shell part, and a plurality of diversion trenches are arranged at intervals in parallel along the width direction of the lower shell part; the supporting cross beam extends along the width direction of the lower shell part, and two ends of the supporting cross beam are connected to the side wall of the lower shell part; the support beams are arranged at intervals in parallel along the length direction of the lower shell part.
Optionally, the battery pack lower shell further comprises a supporting side beam and a leakage detection sensor, the bottom wall of the accommodating cavity is further provided with converging grooves, the converging grooves are respectively communicated with a plurality of guide grooves, the supporting side beam is connected to the edge of the accommodating cavity, one side, facing to the guide grooves, of the bottom of the supporting side beam is provided with a second reinforcing protrusion, the second reinforcing protrusion extends into the guide grooves and is in clearance fit with the guide grooves, and the supporting side beam shields the converging grooves; the liquid leakage detection sensor is arranged in the converging groove to detect whether liquid leakage exists or not.
According to the battery pack lower shell, the cross section of the supporting cross beam is in a step shape, the supporting cross beam comprises a plurality of connected supporting tables, and a battery mounting hole is formed in one supporting table; the support table with higher position is provided with a lightening hole.
Optionally, the battery pack lower shell further comprises a plurality of mounting brackets arranged in pairs, wherein two mounting brackets of each pair are respectively connected to two ends of the supporting beam, and connecting pieces connected with the side walls of the lower shell are arranged on the mounting brackets.
According to the battery pack lower shell, the battery pack lower shell further comprises a lifting lug support, a plurality of mounting lugs are arranged on the outer wall of the lower shell in an outward extending mode, the lifting lug support is connected to the bottom of the lower shell, and the end portion of the lifting lug support is connected with the mounting lugs through fasteners.
Optionally, the battery pack lower shell further comprises a connecting sleeve and a lifting lug reinforcing plate, the mounting lug is arranged in the extending direction of the supporting beam, the connecting sleeve is arranged between the mounting lug and the lifting lug support, the lifting lug reinforcing plate is coated on the outer wall of the lifting lug support, and the mounting lug, the connecting sleeve, the lifting lug support and the lifting lug reinforcing plate are connected through fasteners.
Optionally, the battery pack lower shell further comprises a side beam reinforcing plate and a cross beam reinforcing plate, wherein the side beam reinforcing plate is arranged at the outer side edge of the lower shell part; the extending direction of the beam reinforcing plate is consistent with the extending direction of the supporting beam, and the horizontal projection position of the beam reinforcing plate on the lower shell part is coincident with the horizontal projection position of the supporting beam on the lower shell part.
According to the battery pack lower shell, the lower shell part is formed by machining high-ductility steel plates, and the supporting cross beams are formed by machining high-strength steel plates.
According to an embodiment of the present invention, a battery pack includes: a battery module; a battery pack upper case; the battery pack lower shell is the battery pack lower shell, the battery pack upper shell is connected to the battery pack lower shell to cover the opening, and the battery module is loaded in the split cavity.
According to the battery pack disclosed by the embodiment of the invention, the battery module can be loaded in the split cavity of the lower battery pack shell by adopting the lower battery pack shell, so that the position of the battery module is limited, the battery module is prevented from being displaced when the battery pack moves or is impacted, the upper battery pack shell and the lower battery pack shell are matched to be further used for protecting the battery module, an external sharp object is prevented from touching the battery module, the service life of the battery module is prolonged, and when the battery module leaks, the plurality of diversion trenches on the lower battery pack shell are used for limiting the flowing direction of liquid and diversion the liquid to the preset position, so that a user can timely find the leakage, the safety of the battery module is further improved, and environmental pollution and resource waste are reduced as much as possible.
Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic view illustrating a structure of a battery pack lower case according to an embodiment of the present invention.
Fig. 2 is a partial enlarged view of a part of the structure of fig. 1.
Fig. 3 is a cross-sectional view taken along line A-A in fig. 1.
Fig. 4 is a schematic view of a battery pack lower case according to an embodiment of the present invention, with support beams and support side beams omitted.
Fig. 5 is an exploded view of a partial structure of a lower case of a battery pack according to an embodiment of the present invention.
Fig. 6 is an exploded view of a lower case of a battery pack according to an embodiment of the present invention.
Reference numerals:
1000. a battery pack lower case;
100. a lower housing portion;
110. a receiving chamber; 111. a diversion trench; 112. splitting the cavity; 113. a sink groove;
120. a mounting ear;
130. a boss;
200. a support beam;
210. a first reinforcing protrusion;
220. a support table;
221. a battery mounting hole; 2211. a positioning piece;
222. a lightening hole;
300. supporting side beams; 310. a second reinforcing protrusion;
400. A liquid leakage detection sensor;
500. a mounting bracket; 510. a connecting sheet;
600. a shackle bracket; 610. lifting lug reinforcing plates;
700. connecting sleeves;
800. side beam reinforcing plates;
900. and a cross beam reinforcing plate.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The battery pack lower case 1000 according to the embodiment of the present invention is described below with reference to the drawings of the specification.
A battery pack lower case 1000 according to an embodiment of the present invention, as shown in fig. 1, includes: a lower housing portion 100 and a plurality of support beams 200.
As shown in fig. 1, the lower housing portion 100 forms an open accommodating cavity 110, and a bottom wall of the accommodating cavity 110 is provided with a plurality of concave diversion trenches 111. It is understood that the bottom wall of the guide groove 111 is lower than the bottom wall of the receiving chamber 110 in the height direction of the battery pack lower case 1000 to form a concave guide groove 111, and the plurality means at least two.
As shown in fig. 1, the extending direction of the plurality of supporting beams 200 is disposed at an angle to the extending direction of the diversion trench 111. Here, the extending direction of the support beam 200 is different from the extending direction of the diversion trench 111.
As shown in fig. 1, a plurality of support beams 200 are connected in the receiving chamber 110 such that the receiving chamber 110 is divided into a plurality of sub-chambers 112, and the sub-chambers 112 are adapted to house battery modules.
As shown in fig. 2, a side of the supporting beam 200 facing the diversion trench 111 is provided with a first reinforcing protrusion 210, and the first reinforcing protrusion 210 extends into the diversion trench 111.
As can be seen from the above structure, in the lower casing 1000 of the battery pack according to the embodiment of the present invention, by forming the open accommodating cavity 110 on the lower casing portion 100, the accommodating cavity 110 provides an avoidance space for the subsequent battery module, and the battery module is placed in the accommodating cavity 110 from the open position, so that the accommodating cavity 110 can protect the battery module, and when the lower casing 1000 of the battery pack is impacted, the lower casing portion 100 collapses and absorbs energy and absorbs part of the impact force by using its own strength and rigidity, so as to reduce the damage of the impact force to the battery module; on the other hand, the receiving chamber 110 limits the maximum moving position of the battery module, ensures that the battery module is not dislocated to move to the outside of the lower case part 100 when the lower case 1000 of the battery pack is impacted, and ensures that the battery module is position-stabilized in the receiving chamber 110 to improve the safety of the battery module.
And place battery module in holding chamber 110, when the inside liquid cooling system weeping of battery package or battery package casing break and lead to inside to intake, because gravity reason, liquid can drip in holding chamber 110's diapire, because be provided with many concave guiding gutter 111 on holding chamber 110's the diapire, like this, liquid can continue to flow downwards and flow to in the guiding gutter 111, guiding gutter 111 is used for playing the guide effect to the flow of liquid, ensure that liquid can flow to preset position department, the user of being convenient for more intuitively confirm the weeping problem that current battery package takes place, thereby make corresponding safeguard measure rapidly, improve battery module's security, especially when battery module takes place electrolyte weeping phenomenon, the user can discover weeping problem in the short time, thereby reduce environmental pollution and wasting of resources.
It should be noted that, the plurality of concave diversion trenches 111 may also function to increase the structural strength of the bottom wall of the accommodating cavity 110, so as to effectively protect the battery module.
Through setting up many supporting beams 200, many supporting beams 200 are used for further increasing the structural strength of lower casing portion 100, and when casing 1000 bumps under the battery package, many supporting beams 200 utilize self structural strength to absorb partial impact, and then reduce the damage value of impact to battery module, extension battery module's life. And the extending direction of the supporting beam 200 is different from the extending direction of the diversion trench 111, so that the phenomenon that the supporting beam 200 covers the diversion trench 111 and the diversion trench 111 cannot conduct diversion to liquid normally can be avoided, and further, the diversion trench 111 can conduct leaked liquid to a specific position, and a user can take corresponding measures timely conveniently.
It should be noted that, in the present application, the structural strength of the lower housing portion 100 is enhanced by providing the plurality of supporting beams 200, so that the wall thickness of the lower housing portion 100 can be correspondingly reduced, thereby reducing the weight of the lower housing portion 100, realizing the weight reduction of the lower housing 1000 of the battery pack, and facilitating the processing of the lower housing portion 100 with a thinner thickness, so as to reduce the manufacturing difficulty.
The plurality of support beams 200 divide the accommodating chamber 110 into a plurality of sub-chambers 112, each sub-chamber 112 can be used for accommodating at least one battery module, the sub-chamber 112 provides an installation space for the battery module and limits the maximum movement position of the battery module, when the lower battery pack housing 1000 is impacted or the lower battery pack housing 1000 is rocked, the battery module cannot be dislocated and moved to other positions of the lower battery pack housing 1000, and the position stability of the battery module is improved.
The first reinforcing protrusion 210 of the supporting beam 200 is used for increasing the structural strength of the supporting beam 200, when the lower shell 1000 of the battery pack is impacted, the supporting beam 200 collapses and absorbs energy, and the damage value of the impact force to the battery module is reduced; in the second aspect, the first reinforcing protrusion 210 is used to locate the mounting position of the supporting beam 200, and after the supporting beam 200 is mounted in place, the first reinforcing protrusion 210 needs to extend into the flow guiding groove 111, so that during the mounting process of the supporting beam 200, the mounting position of the supporting beam 200 can be quickly located by the first reinforcing protrusion 210, so that the assembly efficiency of the lower housing 1000 of the battery pack is improved, and the assembly difficulty is reduced; in the third aspect, the first reinforcing protrusions 210 serve to increase the contact area of the supporting beam 200 with the bottom wall of the accommodating chamber 110, so that the supporting beam 200 is positionally stabilized within the accommodating chamber 110. The first reinforcing protrusion 210 extending into the flow guiding groove 111 mainly means that the first reinforcing protrusion 210 is matched with the flow guiding groove 111, wherein the sidewall of the first reinforcing protrusion 210 may be in contact with the sidewall of the flow guiding groove 111 or not in contact with the sidewall of the flow guiding groove 111, or the sidewall of the first reinforcing protrusion 210 is in partial contact with the sidewall of the flow guiding groove 111.
It can be appreciated that, for the prior art, the battery pack lower shell 1000 of the present application strengthens the structural strength of the lower shell portion 100 by setting the supporting beam 200, thereby reducing the wall thickness of the lower shell portion 100, reducing the manufacturing difficulty of the lower shell portion 100 while realizing the light weight of the lower shell portion 100, and arranging a plurality of concave guide grooves 111 on the bottom wall of the accommodating cavity 110, so as to guide the flow of the liquid, and facilitate the user to find and make corresponding measures in time when the liquid leakage occurs in the battery pack, so as to improve the safety of the battery module.
Optionally, the lower housing part 100 includes a bottom wall and a plurality of side walls, where the plurality of side walls are arranged around the bottom wall in an end-to-end manner, so as to form a receiving cavity 110 with an opening at one side, so as to facilitate placement of the battery module. Wherein the bottom wall of the receiving chamber 110 and the bottom wall of the lower housing part 100 are formed in one structure, thus omitting one structural arrangement, saving production costs and reducing the weight of the lower housing part 100.
Alternatively, when the side wall of the first reinforcing protrusion 210 contacts with the side wall of the diversion trench 111, the bottom wall of the first reinforcing protrusion 210 is spaced from the bottom wall of the diversion trench 111, so as to facilitate the flow of the liquid.
In some embodiments of the present invention, as shown in fig. 1, the diversion trench 111 extends along the length direction of the lower housing part 100, and the diversion trenches 111 are arranged in parallel and spaced along the width direction of the lower housing part 100. Because the plurality of groups of battery modules are arranged in the lower housing part 100, the plurality of diversion trenches 111 which are arranged at intervals along the width direction of the lower housing part 100 ensure that no matter leakage occurs at any position, flowing liquid can be diverted to a preset position and diverted along the extending direction of the lower housing part 100.
The longitudinal direction of the lower housing portion 100 herein refers to the front-rear direction of the lower housing portion 100 shown in fig. 1, that is, the flow guide groove 111 extends along the front-rear direction of the lower housing portion 100; the width direction refers to the left-right direction of the lower housing portion 100 shown in fig. 1.
Alternatively, as shown in fig. 1, the support beam 200 is provided to extend in the width direction of the lower housing part 100, and both ends of the support beam 200 are connected to the side walls of the lower housing part 100. That is, the supporting beam 200 is extended along the left and right directions of the lower case part 100, and the supporting beam 200 is extended along the width direction of the lower case part 100 because the guide grooves 111 are extended along the length direction of the lower case part 100, so that the lower case 1000 of the battery pack can absorb the impact force of the part by using the structure and strength of the supporting beam 200 itself to reduce the damage value of the impact force to the battery module, thereby prolonging the service life of the battery module, and the contact area between the supporting beam 200 and the lower case part 100 is increased because the two ends of the supporting beam 200 are respectively connected to the side walls of the lower case part 100, thereby ensuring the position stability of the supporting beam 200 relative to the lower case part 100 and ensuring the effective absorption of the impact force in the moving process of the lower case 1000 of the battery pack.
Alternatively, as shown in fig. 1, a plurality of support beams 200 are arranged in parallel at intervals along the length direction of the lower housing part 100. Because the supporting beams 200 are all connected in the accommodating cavity 110, the accommodating cavity 110 can be divided into a plurality of split cavities 112 by the supporting beams 200 arranged at intervals, avoiding spaces are provided for the arrangement of the battery modules, and the battery modules can be placed in the split cavities 112.
Optionally, the distance between the plurality of support beams 200 is not limited, so long as the distance between two adjacent support beams 200 is ensured to be capable of placing the battery module, and in order to maximize the placement of the battery module in the accommodating cavity 110, the battery module may be placed in the sub-cavity 112 transversely or placed in the sub-cavity 112 longitudinally, so as to improve the endurance mileage of the battery pack.
Optionally, as shown in fig. 1, the battery pack lower case 1000 further includes a support side rail 300, and the support side rail 300 is coupled to an edge of the receiving chamber 110. It may also be understood that the supporting side beam 300 is connected to the inside of the accommodating cavity 110 and located at the edge of the accommodating cavity 110, and the supporting side beam 300 is used for enhancing the structural strength of the lower housing part 100 and playing a role of collapsing and absorbing energy; on the other hand, the supporting side rail 300 serves to shield the hereinafter confluence groove 113, ensuring that the liquid inside the confluence groove 113 does not splash, thereby improving the safety of the battery pack lower case 1000.
Alternatively, the supporting side beam 300 is extended in the width direction of the lower case portion 100, and both ends and one side surface of the supporting side beam 300 are connected to the side wall of the lower case portion 100. For increasing the contact area between the supporting side beam 300 and the lower case portion 100, so that the supporting side beam 300 is position-stabilized with respect to the lower case portion 100, thereby effectively reinforcing the structural strength of the lower case portion 100.
Alternatively, as shown in fig. 1, the support side beams 300 are spaced apart from the support cross beam 200 in parallel along the length direction of the lower housing part 100. The supporting side beam 300 and the supporting cross beam 200 are enabled to define the split cavity 112, and the split cavity 112 is used for arranging the battery modules, so that the space in the accommodating cavity 110 is utilized to the maximum extent, enough battery modules are placed, the battery pack is applied to a vehicle, the endurance mileage of the vehicle is improved, and the user experience is improved.
Optionally, as shown in fig. 4, a converging groove 113 is further disposed on the bottom wall of the accommodating cavity 110, and the converging grooves 113 are respectively communicated with the plurality of diversion trenches 111. The plurality of diversion trenches 111 are used for guiding the leaked liquid into the converging trench 113, that is, guiding the leaked liquid to a specific position, so that a user can more conveniently and intuitively observe whether the battery pack has a liquid leakage phenomenon or not, and accordingly, corresponding measures can be timely taken, the safety of the battery module is improved, and environmental pollution and resource waste are avoided.
In some examples, the height of the confluence groove 113 is lower than the height of the diversion groove 111, thereby ensuring that the liquid in the diversion groove 111 can flow into the confluence groove 113 and accelerating the flow speed of the liquid, so that a user can find the liquid leakage and take corresponding measures in a shorter time.
Optionally, as shown in fig. 5, a second reinforcing protrusion 310 is disposed at a side of the bottom of the supporting side beam 300 facing the diversion trench 111, and the second reinforcing protrusion 310 extends into the diversion trench 111 and is in clearance fit with the diversion trench 111, so that the supporting side beam 300 shields the converging trench 113. The second reinforcing protrusion 310 of the supporting edge beam 300 is used for increasing the structural strength of the supporting edge beam 300, when the battery pack lower case 1000 is impacted, the supporting edge beam 300 collapses and absorbs energy, and the damage value of the impact force to the battery module is reduced; in the second aspect, the second reinforcing protrusion 310 is used to locate the installation position of the supporting edge beam 300, and after the second reinforcing protrusion 310 is installed in place, the second reinforcing protrusion 310 needs to extend into the flow guiding groove 111, so that in the process of installing the supporting edge beam 300, the installation position of the supporting edge beam 300 can be quickly located by the second reinforcing protrusion 310, the assembly efficiency of the lower case 1000 of the battery pack is improved, and the assembly difficulty is reduced; in the third aspect, the second reinforcing protrusions 310 serve to increase the contact area of the supporting side beam 300 with the bottom wall of the accommodating chamber 110, so that the supporting side beam 300 is positionally stabilized with respect to the accommodating chamber 110, and since the accommodating chamber 110 is formed in the lower housing part 100, the supporting side beam 300 is positionally stabilized with respect to the lower housing part 100, thereby effectively reinforcing the structural strength of the lower housing part 100.
In the description of the present invention, a feature defining "first", "second" may explicitly or implicitly include one or more of such feature for distinguishing between the described features, no sequential or light weight fraction.
It should be noted that, because the second reinforcing protrusion 310 extends into the flow guiding groove 111, if the second reinforcing protrusion 310 is completely matched with the flow guiding groove 111, the second reinforcing protrusion 310 can obstruct the flow of the liquid, so that the leaked liquid cannot flow into the flow guiding groove 113, and therefore, the second reinforcing protrusion 310 is in clearance fit with the flow guiding groove 111, and thus, the second reinforcing protrusion 310 can not obstruct the flow of the liquid while improving the assembly efficiency of the lower housing 1000 of the battery pack, and the leaked liquid can flow into the flow guiding groove 113 through the clearance between the second reinforcing protrusion 310 and the flow guiding groove 111.
Alternatively, as shown in fig. 2, the first reinforcing protrusion 210 of the supporting beam 200 extends into the guide groove 111 and is in clearance fit with the guide groove 111, and the beneficial effects generated by the second reinforcing protrusion 310 of the supporting side beam 300 extending into the guide groove 111 and being in clearance fit with the guide groove 111 will not be described herein.
Alternatively, as shown in fig. 4, the battery pack lower case 1000 further includes a leakage detection sensor 400, and the leakage detection sensor 400 is provided in the confluence groove 113 to detect whether or not a liquid is leaked. The leakage detection sensor 400 is adopted for detection, so that naked eyes of a user are not needed, the leakage detection is more timely, accurate and intelligent, and when leaked liquid flows into the confluence groove 113 through the diversion groove 111, the leakage detection sensor 400 can quickly detect the leaked liquid.
Optionally, the battery pack lower case 1000 further includes a controller, the leakage detection sensor 400 is electrically connected to the controller, and when the leakage detection sensor 400 detects that the liquid exists in the confluence groove 113, the leakage detection sensor 400 is used for outputting a detection signal to the controller, the controller is connected with an alarm unit, and after receiving the detection signal sent by the leakage detection sensor 400, the controller controls the alarm unit to alarm so as to remind a user, so that the user can timely make countermeasures.
Optionally, the liquid leakage detection sensor 400 may be a liquid level sensor or other sensors capable of detecting the presence of liquid in the sink 113, and the specific type of the sensor is not limited, so long as it is ensured that when the liquid cooling system inside the battery pack leaks or the battery pack shell breaks to cause internal water inflow, the liquid can be guided into the sink 113, and the liquid leakage detection sensor 400 can detect in time.
In some embodiments of the present invention, as shown in FIG. 3, the cross section of the support beam 200 is stepped, and the support beam 200 includes a plurality of stages of support stands 220 connected. The multi-stage support stand 220 is matched with the battery module to facilitate connection of the battery module, and the structural strength of the support beam 200 can be increased, so that the structural strength of the lower housing part 100 is effectively enhanced.
Optionally, the supporting beam 200 is manufactured by an integral molding process, so that the manufacturing steps are simplified, and the integral supporting beam 200 can better transmit the impact force, so that the phenomenon of fracture of the supporting beam 200 in the process of transmitting the impact force is avoided.
Alternatively, as shown in fig. 3, a battery mounting hole 221 is provided on the primary support stage 220. The battery module is connected to the supporting beam 200 through the battery mounting hole 221, so that on one hand, the contact area between the battery module and the supporting beam 200 is increased, and the position stability of the battery module relative to the supporting beam 200, namely the position stability of the battery module in the lower housing part 100 is ensured; on the other hand, as can be seen from fig. 3, the battery mounting holes 221 are spaced from the bottom wall of the lower housing part 100, so that when the battery module is connected to the supporting beam 200 through the battery mounting holes 221, the battery module is ensured to be spaced from the bottom wall of the lower housing part 100, thereby improving the heat dissipation effect of the battery module.
Optionally, a mating hole for mating with the battery mounting hole 221 is provided on the battery module, and an end of the battery module is connected with the supporting beam 200 through a connector.
Optionally, the connecting piece is a bolt, as shown in fig. 3, a positioning piece 2211 is disposed on one side of the battery mounting hole 221 near the bottom wall of the lower housing part 100, and the bolt sequentially passes through the matching hole on the battery module and the battery mounting hole 221 to be fixed on the positioning piece 2211, so as to realize the fixed connection between the battery module and the supporting beam 200.
Alternatively, the positioning member 2211 is a nut welded to one side of the battery mounting hole 221, and a bolt is fitted in the nut through the fitting hole, the battery mounting hole 221 in order.
Therefore, the battery module is arranged in the split cavity 112, and the two ends of the battery module are respectively connected to the supporting beams 200, so that the battery module is ensured to be stable in position in the split cavity 112, the battery module cannot shake in the process of moving the battery pack lower shell 1000, and the safety of the battery module is improved.
Optionally, as shown in fig. 3, a weight-reducing hole 222 is provided on the support 220 at a higher position. The weight reducing holes 222 are used for reducing the material consumption of the supporting beam 200 and saving the production cost of the supporting beam 200, and the weight reducing holes 222 are used for reducing the weight of the supporting beam 200 and realizing the light weight of the supporting beam 200, so that the supporting beam 200 is connected to the lower housing part 100 and the light weight of the lower housing part 100 can be realized.
In some examples, the top of the supporting table 220 with a higher position is used to abut against the upper casing of the battery pack, so as to increase the contact area between the lower casing 1000 of the battery pack and the upper casing of the battery pack, thereby ensuring the stability of the whole position of the assembled battery pack and effectively protecting the battery module and other components inside the battery pack.
Optionally, as shown in fig. 1, the lower case 1000 of the battery pack further includes a plurality of mounting brackets 500 arranged in pairs, two mounting brackets 500 of each pair are respectively connected to two ends of one supporting beam 200, and connecting pieces 510 connecting the sidewalls of the lower case portion 100 are provided on the mounting brackets 500. The mounting bracket 500 is used for connecting the support beam 200 to the lower housing part 100, and increases the contact area between the support beam 200 and the side wall of the lower housing part 100, so that the support beam 200 can be stably connected to the lower housing part 100, the support beam 200 with stable position can effectively limit the position of the battery module, the position stability of the battery module is improved, and when the battery pack lower housing 1000 is impacted, the support beam 200 can transmit the impact force to the lower housing part 100 through the mounting bracket 500, and then the lower housing part 100 transmits the impact force to the vehicle body of the vehicle, so that the damage value of the impact force to the battery pack lower housing 1000 is reduced.
In a specific assembly process, the mounting bracket 500 is first connected to the support beam 200, and then after the mounting position of the support beam 200 is determined by the first reinforcing protrusion 210 on the support beam 200, the support beam 200 is connected to the lower housing part 100 through the connecting piece 510 on the mounting bracket 500, so that the fixed connection between the support beam 200 and the lower housing part 100 is achieved.
Alternatively, the mounting bracket 500 may be welded to the support beam 200, improving the connection strength of the mounting bracket 500 and the support beam 200 bracket, so that the mounting bracket 500 is position-stable with respect to the support beam 200.
Optionally, a connecting piece 510 on the mounting bracket 500 may be welded to a side wall of the lower housing part 100 for improving the connection strength between the mounting bracket 500 and the lower housing part 100.
Of course, the connection manner between the mounting bracket 500 and the support beam 200 and the lower housing portion 100 is not limited to the above-mentioned welding, and may be a connection manner such as bolting or riveting, so long as the stability of the relative positions between the mounting bracket 500 and the support beam 200 and the lower housing portion 100 is ensured, and the specific connection manner is not limited.
In some embodiments of the present invention, as shown in fig. 5, the battery pack lower case 1000 further includes a tab bracket 600 having a plurality of mounting lugs 120 extending outwardly from an outer wall of the lower case portion 100, the tab bracket 600 being coupled to a bottom of the lower case portion 100, and an end of the tab bracket 600 being coupled to the mounting lugs 120 by fasteners. The outer wall of the lower housing part 100 refers to a side wall of the lower housing part 100 away from the accommodating cavity 110, and the mounting lug 120 is disposed on the outer wall of the lower housing part 100, so that the contact area between the lifting lug bracket 600 and the lower housing part 100 can be increased by the mounting lug 120, and the connection between the lifting lug bracket 600 and the lower housing part 100 is stable.
Optionally, the end of the lifting lug support 600 is provided with a whole car mounting hole, the lifting lug support 600 is connected to the car body through the whole car mounting hole, one side of the lifting lug support 600, which is far away from the whole car mounting hole, is turned down for connection with the bottom of the lower shell part 100, and the turned-down position is provided with a reinforcing rib to strengthen the structural strength of the lifting lug support 600.
It should be noted that, this application is through setting up lug support 600, and lug support 600 is used for connecting casing 1000 under the battery package on the automobile body, increases the area of contact of casing 1000 under the battery package and automobile body to casing 1000 is stable for the automobile body position under the battery package, and when casing 1000 received the striking under the battery package, the impact force accessible lug support 600 transmitted to the automobile body on, reduced the damage value of striking casing 1000 under the battery package.
Alternatively, the mounting lugs 120 are provided in the extending direction of the support cross member 200. It can also be understood that the mounting lug 120 is arranged corresponding to the supporting beam 200, so that when the battery pack lower shell 1000 is impacted, the supporting beam 200 collapses and absorbs energy and transmits partial impact force to the mounting lug 120, as one end of the lifting lug bracket 600 is connected to the mounting lug 120, the other end of the lifting lug bracket 600 is connected to the vehicle body, and therefore, the impact force transmitted to the mounting lug 120 can be transmitted to the vehicle body through the lifting lug bracket 600, so that the damage value of the impact force to the battery pack lower shell 1000 is reduced, the service life of a battery module arranged inside the battery pack lower shell 1000 can be prolonged, and the safety of the battery module is improved.
As shown in fig. 1, when the two support beams 200 are closer to each other, one end of each support beam 200 may share one mounting ear 120, so as to reduce the number of mounting ears 120, and reduce the number of lifting lug brackets 600, thereby realizing the weight reduction of the battery pack lower case 1000.
Alternatively, the mounting lug 120 and the lower case part 100 are formed as an integral structure, that is, the lower case part 100 and the mounting lug 120 are manufactured by an integral molding process during the production of the battery pack lower case 1000, so that the steps of welding, fixing, etc. which are premised are omitted, and the position stability of the mounting lug 120 with respect to the lower case part 100 can be ensured.
Of course, in other examples, the mounting lug 120 and the lower case part 100 may be formed in two separate structures, the mounting lug 120 is welded to the lower case part 100 during the assembly of the battery pack lower case 1000, the welded connection may also secure the connection strength between the mounting lug 120 and the lower case part 100, and by being formed in two separate structures, the position of the mounting lug 120 may be selectively set during the assembly, ensuring that the impact force may be transmitted to the vehicle body through the mounting lug 120 and the tab bracket 600.
Optionally, as shown in fig. 5, the battery pack lower case 1000 further includes a connection sleeve 700 and a tab reinforcement plate 610, and the connection sleeve 700 is disposed between the mounting ears 120 and the tab bracket 600. It can be understood that at least part of the structure of the lug bracket 600 is spaced from the mounting lug 120, and the connecting sleeve 700 is disposed between the mounting lug 120 and the lug bracket 600, so that the connecting sleeve 700 can serve to support the mounting lug 120 and the lug bracket 600 on one hand, thereby improving the structural strength of the battery pack lower case 1000; on the other hand, in the process of installing the fastener, the connecting sleeve 700 can play a guiding role, so that the end part of the lifting lug support 600 and the mounting lug 120 can be connected through the fastener, and meanwhile, when the fastener is prevented from being screwed down, the lifting lug support 600 and the mounting lug 120 are prevented from being extruded to deform, and the battery pack lower shell 1000 and the vehicle body are ensured to be reliably connected.
Optionally, the shackle stiffener 610 is wrapped around the outer wall of the shackle bracket 600. The tab reinforcement plate 610 serves to reinforce the structural strength of the tab bracket 600, thereby ensuring that the battery pack lower case 1000 can be stably coupled to the vehicle body through the tab bracket 600.
Optionally, fasteners connect the mounting ears 120, the connection sleeves 700, the shackle brackets 600, and the shackle stiffening plate 610. In the specific assembly process, avoidance holes for avoiding fasteners are formed in the mounting lug 120, the connecting sleeve 700, the lifting lug support 600 and the lifting lug reinforcing plate 610, and the fasteners sequentially penetrate through the avoidance holes and are connected with the vehicle body.
Optionally, the fastening piece is a fastening bolt, a threaded hole matched with the fastening piece is formed in the vehicle body, and the fastening bolt sequentially penetrates through the mounting lug 120, the connecting sleeve 700, the lifting lug support 600 and the avoidance hole in the lifting lug reinforcing plate 610 to be fixedly connected to the vehicle body.
Optionally, as shown in fig. 6, the battery pack lower case 1000 further includes a side rail reinforcement plate 800 and a cross beam reinforcement plate 900, and the side rail reinforcement plate 800 is provided at an outer edge of the lower case portion 100. The side beam reinforcement plate 800 serves to further reinforce the structural strength of the lower case part 100, so that the lower case part 100 can effectively protect the battery module.
Optionally, the flange faces of the side beam reinforcement plate 800 and the lower housing portion 100 are contoured to connect the side beam reinforcement plate 800 to the lower housing portion 100 and increase the strength of the connection of the side beam reinforcement plate 800 to the lower housing portion 100.
Optionally, the side beam reinforcement plate 800 includes a front side beam reinforcement plate 800 and a rear side beam reinforcement plate 800 and a left side beam reinforcement plate 800, where the front side beam reinforcement plate 800 and the rear side beam reinforcement plate 800 are sequentially connected end to form the side beam reinforcement plate 800, where the front side beam reinforcement plate 800 and the rear side beam reinforcement plate 800 are respectively located at the front side outer side edge and the rear side outer side edge of the lower housing portion 100, and the left side beam reinforcement plate 800 and the right side beam reinforcement plate 800 are respectively located at the left side outer side edge and the right side outer side edge of the lower housing portion 100.
Alternatively, the front and rear side beam reinforcement plates 800 and the left and right side beam reinforcement plates 800 are formed into the side beam reinforcement plates 800 by resistance welding. The relative positions of the front and rear side beam reinforcing plates 800 and the left and right side beam reinforcing plates 800 are stabilized.
Alternatively, as shown in fig. 3 and 6, the extending direction of the beam reinforcement plate 900 coincides with the extending direction of the support beam 200, and the horizontal projection position of the beam reinforcement plate 900 on the lower housing portion 100 coincides with the horizontal projection position of the support beam 200 on the lower housing portion 100. It can also be understood that the beam reinforcing plate 900 is disposed corresponding to the supporting beam 200, and the beam reinforcing plate 900 and the supporting beam 200 are disposed on the inner and outer sides of the lower housing portion 100, so as to increase the structural strength of the lower housing portion 100, thereby ensuring the structural stability and reliability of the lower housing portion 100, avoiding the problems of abnormal resonance and durable cracking of the lower housing portion 100 during the driving process, and thus affecting the normal operation of the battery module to cause inconvenient driving.
Alternatively, the support beam 200 and the beam reinforcement plate 900 are connected to the lower housing part 100 by resistance welding, increasing the connection strength of the support beam 200 and the beam reinforcement plate 900 to the lower housing part 100.
In some embodiments of the invention, the lower housing portion 100 is formed from a high ductility sheet. Because the lower housing part 100 is mainly used for sealing the battery module, and the area of the lower housing part 100 is relatively large, the structural difficulty of the lower housing part 100 can be reduced by manufacturing the lower housing part 100 from a high-ductility steel plate, the lower housing part 100 can be manufactured by adopting an integral molding process, and the high-ductility steel plate has light weight, so that the weight of the lower housing part 100 can be reduced.
The high ductility steel sheet herein mainly refers to a steel sheet having an elongation percentage of 30% or more after fracture, thereby ensuring that the lower case portion 100 can be deep-drawn to form the lower case portion 100 having a large area for sealing the battery module and other components.
Optionally, the plurality of support beams 200 are formed from a high strength steel sheet. Because the supporting beams 200 mainly bear the weight of the battery module and strengthen the structural strength of the lower shell part 100, the supporting beams 200 are made of high-strength steel plates, so that the structural strength of the supporting beams 200 can be enhanced, the structural strength of the supporting beams 200 is improved, and the structural strength and the structural stability of the lower shell part 100 are effectively enhanced.
Alternatively, the supporting side beam 300, the mounting bracket 500, the lifting lug bracket 600, the connecting sleeve 700, the side beam reinforcing plate 800 and the cross beam reinforcing plate 900 may be formed of high-strength steel plates, thereby further increasing the structural strength of the battery pack lower case 1000.
It should be noted that, when the mounting lug 120 and the lower housing part 100 are formed as two separate structures, the mounting lug 120 may be formed by using a high-strength steel plate to increase the structural strength of the mounting lug 120, so as to ensure that the lifting lug bracket 600 can be stably connected to the mounting lug 120.
Alternatively, the high-strength steel plate herein mainly refers to a steel plate having a tensile strength of 550-1200 Mpa to improve the structural strength of the supporting beam 200, the supporting side beam 300, the mounting bracket 500, etc.
It should be emphasized that, this application is through setting up the lower casing 1000 of battery package to be made by different materials, wherein, the supporting beam 200 that mainly used bears the weight of the battery module, support boundary beam 300, boundary beam reinforcing plate 800 and crossbeam reinforcing plate 900 equistructure sets up to high strength steel sheet, lower casing portion 100 that mainly used seals the battery module sets up to high ductility steel sheet, the rethread structural design (like setting up guiding gutter 111 and setting up supporting beam 200 to be formed by multistage brace table 220 etc.) effectively reduces the steel sheet thickness, wherein, the thickness of supporting beam 200 can reduce to 1.0mm, the thickness of lower casing portion 100 can reduce to 0.8mm, thereby make the lower casing 1000 of battery package of this application can reduce weight 30% -40% for the lower casing weight that traditional sheet metal material made, make the lower casing 1000 of battery package of this application and lower casing weight that aluminum alloy material make up, ensure that lower casing 1000 of battery package of this application still can realize the lightweight while improving structural strength.
The battery pack of the embodiment of the present invention is described below.
According to an embodiment of the present invention, a battery pack includes: battery module, battery pack upper case, and battery pack lower case 1000.
The battery pack lower case 1000 is the battery pack lower case 1000 described above, and the battery pack upper case is connected to the battery pack lower case 1000 to cover the opening, and the battery module is loaded in the split chamber 112.
As can be seen from the above structure, in the battery pack according to the embodiment of the present invention, the battery pack lower case 1000 is adopted to load the battery module in the split cavity 112, so as to define the position of the battery module, ensure that the battery module will not shake when the battery pack moves or is impacted, and the cooperation of the battery pack upper case and the battery pack lower case 1000 is also used to protect the battery module, ensure that the external sharp object will not touch the battery module, and prolong the service life of the battery module.
Alternatively, as shown in fig. 5, the sidewall flange of the battery pack lower case 1000 is provided with a boss 130, and a nut hole is formed on the boss 130. The fixing member cooperates with the nut hole to connect the battery pack upper case to the battery pack lower case 1000 to shield the opening.
In the specific assembly process, the battery pack upper shell and the battery pack lower shell 1000 are pre-positioned through the nut holes, then are connected through the fixing pieces, and finally the battery pack upper shell is welded on the battery pack lower shell 1000, so that the battery pack is formed into a closed structure to effectively protect the battery module.
The following describes a battery pack lower case 1000 and a specific structure of a battery pack having the same in the specific embodiment of the present invention with reference to the drawings. The embodiments of the present invention may be all the embodiments of the combination of the foregoing technical solutions, but are not limited to the following specific embodiments, which fall within the scope of the present invention.
Example 1
A battery pack lower case 1000, as shown in fig. 1, includes: a lower housing portion 100 and four support beams 200.
As shown in fig. 1, an open accommodating cavity 110 is formed on the lower housing portion 100, and seven concave diversion trenches 111 are disposed on a bottom wall of the accommodating cavity 110.
As shown in fig. 1, the four support beams 200 are disposed at an angle to the extending direction of the flow guide grooves 111, and the four support beams 200 are connected in the accommodating chamber 110 so that the accommodating chamber 110 is divided into five sub-chambers 112, and the sub-chambers 112 are adapted to dispose the battery modules.
As shown in fig. 2, a side of the supporting beam 200 facing the diversion trench 111 is provided with a first reinforcing protrusion 210, and the first reinforcing protrusion 210 extends into the diversion trench 111.
Example 2
On the basis of embodiment 1, as shown in fig. 1, the battery pack lower casing 1000 further comprises a supporting side beam 300 and a leakage detection sensor 400, the supporting side beam 300 is connected to the edge of the accommodating cavity 110, the bottom wall of the accommodating cavity 110 is further provided with a converging groove 113, the converging grooves 113 are respectively communicated with seven guide grooves 111, one side, facing the guide grooves 111, of the bottom of the supporting side beam 300 is provided with a second reinforcing protrusion 310, and the second reinforcing protrusion 310 extends into the guide grooves 111 and is in clearance fit with the guide grooves 111, and the converging grooves 113 are shielded by the supporting side beam 300.
The liquid leakage detection sensor 400 is provided in the confluence groove 113 to detect whether or not liquid leakage occurs.
Example 3
Based on embodiment 1, as shown in fig. 5, the battery pack lower case 1000 further includes a lifting lug bracket 600, a connecting sleeve 700 and a lifting lug reinforcing plate 610, eight mounting lugs 120 are outwardly extended on the outer wall of the lower case portion 100, the lifting lug bracket 600 is connected to the bottom of the lower case portion 100, and the end of the lifting lug bracket 600 is connected to the mounting lugs 120 through fasteners.
The connecting sleeve 700 is arranged between the mounting lug 120 and the lifting lug support 600, the lifting lug reinforcing plate 610 is coated on the outer wall of the lifting lug support 600, and the mounting lug 120, the connecting sleeve 700, the lifting lug support 600 and the lifting lug reinforcing plate 610 are connected by fasteners.
Example 4
The battery pack lower case 1000 further includes, as shown in fig. 6, a side sill reinforcing plate 800 and a cross member reinforcing plate 900, the side sill reinforcing plate 800 being provided at the outer edge of the lower case portion 100, on the basis of embodiment 3.
As shown in fig. 3 and 6, the extending direction of the beam reinforcement plate 900 coincides with the extending direction of the support beam 200, and the horizontal projection position of the beam reinforcement plate 900 on the lower housing portion 100 coincides with the horizontal projection position of the support beam 200 on the lower housing portion 100.
Example 5
A battery pack lower case 1000, comprising: battery module, battery pack upper case, and battery pack lower case 1000.
The battery pack lower case 1000 is the battery pack lower case 1000 of embodiment 1, and the battery pack upper case is attached to the battery pack lower case 1000 to shield the opening, and the battery module is loaded in the split chamber 112.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The detection principle of the battery pack lower case 1000 and other structures of the battery pack having the same, such as the leakage detection sensor 400, according to the embodiment of the present invention is known to those skilled in the art, and will not be described in detail herein.
In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A battery pack lower case, comprising:
the lower shell part forms an open accommodating cavity, a plurality of concave diversion trenches are formed in the bottom wall of the accommodating cavity, the lower shell part is formed by processing a high-ductility steel plate, and a plurality of mounting lugs are outwards extended on the outer wall of the lower shell part;
The plurality of supporting beams are arranged in an angle with the extending direction of the diversion trench; the supporting beams are connected in the accommodating cavity so as to divide the accommodating cavity into a plurality of sub-cavities, and the sub-cavities are suitable for arranging the battery modules; a first reinforcing protrusion is arranged on one side of the supporting beam, which faces the diversion trench, and extends into the diversion trench;
the guide grooves extend along the length direction of the lower shell part, and a plurality of guide grooves are arranged at intervals in parallel along the width direction of the lower shell part; the supporting cross beam extends along the width direction of the lower shell part, and two ends of the supporting cross beam are connected to the side wall of the lower shell part; the support cross beams are arranged at intervals in parallel along the length direction of the lower shell part;
the device comprises a receiving cavity, a supporting side beam and a leakage detection sensor, wherein the bottom wall of the receiving cavity is also provided with a converging groove which is respectively communicated with a plurality of guide grooves, the supporting side beam is connected with the edge of the receiving cavity, one side of the bottom of the supporting side beam, which faces the guide grooves, is provided with a second reinforcing protrusion, the second reinforcing protrusion stretches into the guide grooves and is in clearance fit with the guide grooves, and the supporting side beam shields the converging grooves;
The liquid leakage detection sensor is arranged in the converging groove to detect whether liquid leakage exists or not.
2. The battery pack lower case according to claim 1, wherein the cross section of the supporting beam is stepped, the supporting beam comprises a plurality of connected supporting stages, and a battery mounting hole is formed in one of the supporting stages; the support table with higher position is provided with a lightening hole.
3. The battery pack lower case according to claim 2, further comprising a plurality of mounting brackets provided in pairs, two of the mounting brackets of each pair being respectively connected to both ends of one of the support beams, the mounting brackets being provided with connection pieces for connecting the side walls of the lower case portion.
4. The battery pack lower housing of claim 1 further comprising a shackle bracket attached to a bottom of the lower housing portion, an end of the shackle bracket being attached to the mounting ear by a fastener.
5. The battery pack lower case according to claim 4, further comprising a connection sleeve and a lug reinforcing plate, wherein the connection sleeve is arranged in the extending direction of the support beam, the connection sleeve is arranged between the connection sleeve and the lug support, the lug reinforcing plate is coated on the outer wall of the lug support, and the fastener connects the connection sleeve, the lug support and the lug reinforcing plate.
6. The battery pack lower case according to claim 4, further comprising a side beam reinforcement plate and a cross beam reinforcement plate, the side beam reinforcement plate being provided at an outer side edge of the lower case portion; the extending direction of the beam reinforcing plate is consistent with the extending direction of the supporting beam, and the horizontal projection position of the beam reinforcing plate on the lower shell part is coincident with the horizontal projection position of the supporting beam on the lower shell part.
7. The battery pack lower case according to claim 1, wherein a plurality of the support beams are formed of a high-strength steel plate.
8. A battery pack, comprising:
a battery module;
a battery pack upper case;
a battery pack lower case, which is the battery pack lower case according to any one of claims 1 to 7, the battery pack upper case being connected to the battery pack lower case to shield the opening, the battery module being loaded in the split chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110885165.1A CN113690525B (en) | 2021-08-03 | 2021-08-03 | Battery pack lower shell and battery pack with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110885165.1A CN113690525B (en) | 2021-08-03 | 2021-08-03 | Battery pack lower shell and battery pack with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113690525A CN113690525A (en) | 2021-11-23 |
| CN113690525B true CN113690525B (en) | 2023-06-23 |
Family
ID=78578894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110885165.1A Active CN113690525B (en) | 2021-08-03 | 2021-08-03 | Battery pack lower shell and battery pack with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113690525B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2693522A1 (en) * | 2012-08-03 | 2014-02-05 | Magna E-Car Systems GmbH & Co OG | Battery module |
| CN207368030U (en) * | 2017-08-11 | 2018-05-15 | 深圳市沃特玛电池有限公司 | A kind of cold battery box structure of liquid |
| CN108923089A (en) * | 2018-05-08 | 2018-11-30 | 苏州正力蔚来新能源科技有限公司 | The security protection of dynamic lithium battery packet for electric vehicle and prior-warning device and its method |
| CN209071470U (en) * | 2018-12-29 | 2019-07-05 | 蜂巢能源科技有限公司 | The lower case of battery pack |
| CN210224142U (en) * | 2019-09-30 | 2020-03-31 | 蜂巢能源科技有限公司 | Battery pack assembly and vehicle with same |
| WO2021098760A1 (en) * | 2019-11-22 | 2021-05-27 | 比亚迪股份有限公司 | Battery, battery module, battery pack, and automobile |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM477680U (en) * | 2014-01-10 | 2014-05-01 | Simplo Technology Company Ltd | Battery module |
| CN203967141U (en) * | 2014-06-11 | 2014-11-26 | 湖北文理学院 | A kind of high security vehicle lithium power cell case |
| CN106384851A (en) * | 2016-11-29 | 2017-02-08 | 华霆（合肥）动力技术有限公司 | Leakage inspection device and battery module |
| CN106785127A (en) * | 2017-03-02 | 2017-05-31 | 华霆（合肥）动力技术有限公司 | A kind of battery system and electronic equipment |
| CN207731965U (en) * | 2017-11-14 | 2018-08-14 | 中能绿驰成都汽车科技有限公司 | A kind of novel battery packet liquid-leakage preventing backplate |
| CN208127374U (en) * | 2018-04-02 | 2018-11-20 | 东莞市迈泰热传科技有限公司 | It is a kind of for protecting the support holder structure of battery |
| CN111106280B (en) * | 2019-08-27 | 2021-05-25 | 宁德时代新能源科技股份有限公司 | Battery pack |
| CN111106281B (en) * | 2019-08-27 | 2021-08-06 | 宁德时代新能源科技股份有限公司 | Battery pack |
| CN210956776U (en) * | 2019-11-27 | 2020-07-07 | 苏州市鑫弈铖五金制品有限公司 | New energy battery shell |
| CN111697277B (en) * | 2020-06-12 | 2021-09-14 | 广州嘉宇新能源有限公司 | Battery leakage-proof device for electric automobile |
| CN112519708B (en) * | 2020-11-30 | 2022-04-12 | 奇瑞新能源汽车股份有限公司 | Storage battery tray and vehicle |
| CN113036296B (en) * | 2021-03-18 | 2023-12-15 | 奇瑞新能源汽车股份有限公司 | Battery pack lower shell and battery pack with same |
-
2021
- 2021-08-03 CN CN202110885165.1A patent/CN113690525B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2693522A1 (en) * | 2012-08-03 | 2014-02-05 | Magna E-Car Systems GmbH & Co OG | Battery module |
| CN207368030U (en) * | 2017-08-11 | 2018-05-15 | 深圳市沃特玛电池有限公司 | A kind of cold battery box structure of liquid |
| CN108923089A (en) * | 2018-05-08 | 2018-11-30 | 苏州正力蔚来新能源科技有限公司 | The security protection of dynamic lithium battery packet for electric vehicle and prior-warning device and its method |
| CN209071470U (en) * | 2018-12-29 | 2019-07-05 | 蜂巢能源科技有限公司 | The lower case of battery pack |
| CN210224142U (en) * | 2019-09-30 | 2020-03-31 | 蜂巢能源科技有限公司 | Battery pack assembly and vehicle with same |
| WO2021098760A1 (en) * | 2019-11-22 | 2021-05-27 | 比亚迪股份有限公司 | Battery, battery module, battery pack, and automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113690525A (en) | 2021-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102635154B1 (en) | Battery box floor and corresponding body for electric vehicles | |
| JP6215896B2 (en) | Vehicle structure | |
| CN210006806U (en) | Battery pack shell, battery pack and vehicle | |
| CN207549934U (en) | For new energy car battery three-dimensional safety protection device | |
| CN111697172B (en) | Battery tray, power battery package and vehicle | |
| WO2023011593A1 (en) | Battery pack, vehicle body, and vehicle | |
| CN113690525B (en) | Battery pack lower shell and battery pack with same | |
| CN210897345U (en) | Battery pack lower shell and battery pack | |
| CN212303800U (en) | Supporting component, battery pack shell with same and vehicle | |
| CN113036296A (en) | Battery pack lower shell and battery pack with same | |
| CN210971291U (en) | Front end module and vehicle | |
| CN217387401U (en) | Battery tray, battery pack and vehicle | |
| KR20230147197A (en) | Body frame and vehicle having body frame | |
| CN111697173A (en) | Battery tray, power battery package and vehicle | |
| CN113782899A (en) | Battery pack shell, battery pack and electric vehicle | |
| CN219717098U (en) | Battery case and battery pack with same | |
| CN218334143U (en) | Battery pack shell and battery pack | |
| CN219055954U (en) | Vehicle with a vehicle body having a vehicle body support | |
| CN219687442U (en) | A threshold roof beam and vehicle for vehicle | |
| CN214336840U (en) | Lower shell assembly and battery pack | |
| CN217918108U (en) | Threshold roof beam and vehicle | |
| CN216374741U (en) | Enclose before thermal-insulated effectual EVA | |
| CN218662062U (en) | Rear side wall assembly of vehicle and vehicle | |
| CN219658888U (en) | Box and battery and power consumption device with same | |
| CN216698633U (en) | Battery package back boundary beam and battery package |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |