CN113690525A - Battery pack lower shell and battery pack with same - Google Patents

Battery pack lower shell and battery pack with same Download PDF

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Publication number
CN113690525A
CN113690525A CN202110885165.1A CN202110885165A CN113690525A CN 113690525 A CN113690525 A CN 113690525A CN 202110885165 A CN202110885165 A CN 202110885165A CN 113690525 A CN113690525 A CN 113690525A
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CN
China
Prior art keywords
battery pack
supporting
battery
lower case
mounting
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Granted
Application number
CN202110885165.1A
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Chinese (zh)
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CN113690525B (en
Inventor
王亚东
马春生
王正红
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Chery New Energy Automobile Co Ltd
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Chery New Energy Automobile Co Ltd
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Priority to CN202110885165.1A priority Critical patent/CN113690525B/en
Publication of CN113690525A publication Critical patent/CN113690525A/en
Application granted granted Critical
Publication of CN113690525B publication Critical patent/CN113690525B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—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

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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)

Abstract

The invention discloses a lower shell of a battery pack and the battery pack with the lower shell, wherein the lower shell of the battery pack comprises a lower shell part and a plurality of supporting cross beams, the lower shell part forms an open accommodating cavity, the bottom wall of the accommodating cavity is provided with a plurality of concave flow guide grooves, the extending directions of the supporting cross beams and the extending directions of the flow guide grooves are arranged at an angle, the supporting cross beams are connected in the accommodating cavity to divide the accommodating cavity into a plurality of sub-cavity, a battery module is suitable for being arranged in the sub-cavity, one side of the supporting cross beam, which faces the flow guide grooves, is provided with a first reinforcing bulge, and the first reinforcing bulge extends into the flow guide grooves. According to the lower shell of the battery pack, when liquid leaks from a liquid cooling system in the battery pack or water enters the battery pack, the flow guide grooves in the bottom wall of the containing cavity can guide the liquid to a specific position and remind a user, so that the safety of the battery module is improved, and the plurality of supporting cross beams are arranged in the containing 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

Battery pack lower shell and battery pack with same
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 same.
Background
The battery package is mainly including casing under the battery package, casing on the battery package, the battery module, high-voltage electrical system and thermal management system, place the battery module, high-voltage electrical system and thermal management system place the inside of casing under the battery package, the casing mainly plays the effect of protection battery module, high-voltage electrical system and thermal management system under the battery package, consequently, the casing is one of battery package core spare part under the battery package, the structural strength and the stability of casing have directly decided the wholeness ability of battery package under the battery package.
In the prior art, in order to increase the structural strength of the lower shell, the lower shell of the battery pack is usually thickened, and the lower shell of the battery pack is made of a material with higher strength and poorer ductility, so that the overall weight of the lower shell of the battery pack is heavy, and the manufacturing difficulty is increased; moreover, in order to effectively protect the components arranged inside the battery pack, the battery pack is usually formed into a closed structure, so that when the liquid leakage of the liquid cooling system inside the battery pack and the electrolyte leak or the battery pack shell is broken to cause the water to enter 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 is directed to solving at least one of the problems of the prior art. Therefore, the lower shell of the battery pack is high in structural strength and easy to process, leakage can be found in time when the leakage occurs, safety is improved, and the technical problems that the lower shell of the battery pack is heavy in weight, high in manufacturing difficulty and low in safety in the prior art are solved.
The invention also aims to provide a battery pack with the lower shell of the battery pack.
According to an embodiment of the present 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 extending directions of the plurality of supporting beams and the extending direction of the diversion trench are arranged at an angle; the supporting cross beams are connected in the accommodating cavity so that the accommodating cavity is divided into a plurality of separated cavities, and the separated 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 lower shell of the battery pack, the plurality of flow guide grooves are formed in the bottom wall of the accommodating cavity, when a liquid cooling system in the battery pack leaks liquid, electrolyte leaks or the battery pack shell is broken to cause internal water inflow, the flow guide grooves are used for guiding the liquid to a specific position and reminding a user when the liquid is guided to the specific position, the safety of a battery module is improved, the plurality of supporting cross beams are arranged in the accommodating cavity, the structural strength of the lower shell of the battery pack is enhanced while the manufacturing difficulty of the lower shell of the battery pack is not increased by the plurality of supporting cross beams, the lower shell of the battery pack can effectively protect the battery module, the service life of the battery module is prolonged, and the plurality of supporting cross beams are provided with the first reinforcing protrusions matched with the flow guide grooves and used for limiting the positions of the plurality of supporting cross beams and reducing the assembling difficulty. The utility model provides a casing under battery package, structural strength is high, light in weight just can improve the security of battery module.
According to the lower shell of the battery pack, the diversion grooves extend along the length direction of the lower shell, and the diversion grooves are arranged in parallel at intervals along the width direction of the lower shell; the supporting cross beams extend along the width direction of the lower shell part, and two ends of each supporting cross beam are connected to the side walls of the lower shell part; the plurality of supporting beams are arranged in parallel at intervals along the length direction of the lower shell part.
Optionally, the lower case of the battery pack further comprises a supporting side beam and a leakage detection sensor, a confluence groove is further formed in the bottom wall of the accommodating cavity, the confluence grooves are respectively communicated with the plurality of diversion grooves, the supporting side beam is connected to the edge of the accommodating cavity, a second reinforcing protrusion is arranged on one side, facing the diversion grooves, of the bottom of the supporting side beam, the second reinforcing protrusion extends into the diversion grooves and is in clearance fit with the diversion grooves, and the confluence groove is shielded by the supporting side beam; the liquid leakage detection sensor is arranged in the confluence groove to detect whether liquid leakage occurs or not.
According to the battery pack lower shell, the cross section of the supporting beam is in a step shape, the supporting beam comprises a plurality of stages of supporting tables which are connected, and battery mounting holes are formed in the stages of supporting tables; and lightening holes are formed in the supporting platform at the higher position.
Optionally, the battery pack lower shell further comprises a plurality of mounting brackets arranged in pairs, each pair of two mounting brackets are connected to two ends of one supporting beam respectively, and the mounting brackets are provided with connecting pieces connected with the side walls of the lower shell part.
According to one embodiment of the invention, the lower battery pack shell further comprises a lifting lug support, a plurality of mounting lugs extend outwards from the outer wall of the lower shell, the lifting lug support is connected to the bottom of the lower shell, and the end part of the lifting lug support is connected with the mounting lugs through fasteners.
Optionally, the battery pack lower casing still includes adapter sleeve and lug reinforcing plate, the installation ear is established on supporting beam's extending direction, the adapter sleeve is laid the installation ear with between the lug support, the lug reinforcing plate cladding is in the lug support outer wall, the fastener will the installation ear the adapter sleeve the lug support with the lug reinforcing plate is connected.
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 superposed with the horizontal projection position of the supporting beam on the lower shell part.
According to the battery pack lower case of one embodiment of the present invention, the lower case portion is formed by machining a high-ductility steel plate, and the plurality of support beams are formed by machining a high-strength steel plate.
A battery pack according to an embodiment of the present invention includes: a battery module; the battery pack is provided with a shell; the lower casing of the battery pack is the lower casing of the battery pack, the upper casing of the battery pack is connected to the lower casing of the battery pack so as to shield the opening, and the battery module is loaded in the split cavity.
According to the battery pack provided by the embodiment of the invention, by adopting the lower battery pack shell, the battery module can be loaded in the split cavity of the lower battery pack shell to limit the position of the battery module, so that the battery module can not be displaced when the battery pack moves or is impacted, the upper battery pack shell and the lower battery pack shell are matched to further protect the battery module, so that an external sharp object can not touch the battery module, the service life of the battery module is prolonged, and when the battery module leaks, a plurality of flow guide grooves on the lower battery pack shell are used for limiting the flow direction of liquid and guiding the liquid to a preset position, so that a user can find the leaked liquid in time, the safety of the battery module is further improved, and the environmental pollution and the resource waste are reduced as much as possible.
Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a lower case of a battery pack according to an embodiment of the present invention.
Fig. 2 is a partially enlarged view of a part of the structure in fig. 1.
Fig. 3 is a cross-sectional view taken along line a-a of fig. 1.
Fig. 4 is a schematic view of a battery pack case according to an embodiment of the present invention without the support cross members and the support side members.
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 the lower case of the battery pack according to one embodiment of the present invention.
Reference numerals:
1000. a battery pack lower case;
100. a lower housing portion;
110. an accommodating chamber; 111. a diversion trench; 112. separating the body cavity; 113. a confluence groove;
120. mounting lugs;
130. a boss portion;
200. a support beam;
210. a first reinforcing protrusion;
220. a support table;
221. a battery mounting hole; 2211. a positioning member;
222. lightening holes;
300. supporting the edge beam; 310. a second reinforcing protrusion;
400. a liquid leakage detection sensor;
500. mounting a bracket; 510. connecting sheets;
600. a lifting lug support; 610. a lifting lug reinforcing plate;
700. connecting sleeves;
800. a boundary beam stiffener;
900. a beam stiffener.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 will be described with reference to the accompanying drawings.
A battery pack 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 plurality of concave flow guide grooves 111 are formed in a bottom wall of the accommodating cavity 110. It is understood that the bottom wall of the guide groove 111 is lower than the bottom wall of the receiving cavity 110 in the height direction of the battery pack lower case 1000 to form a depressed guide groove 111, and the plurality as referred to herein means at least two.
As shown in fig. 1, the extending directions of the plurality of supporting beams 200 are arranged at an angle to the extending direction of the guiding gutter 111. Here, the extending direction of the supporting beam 200 is different from the extending direction of the guide groove 111.
As shown in fig. 1, a plurality of support beams 200 are coupled in the receiving chamber 110 such that the receiving chamber 110 is divided into a plurality of divided chambers 112, in which the battery modules are adapted to be arranged, in the divided chambers 112.
As shown in fig. 2, a side of the support beam 200 facing the flow guide groove 111 is provided with a first reinforcing protrusion 210, and the first reinforcing protrusion 210 extends into the flow guide groove 111.
According to the structure, the lower housing part 1000 of the battery pack in the embodiment of the invention, the open accommodating cavity 110 is formed on the lower housing part 100, the accommodating cavity 110 provides an avoiding space for the subsequent arrangement of the battery module, the battery module is placed in the accommodating cavity 110 from the open, on one hand, the accommodating cavity 110 can play a role in protecting the battery module, when the lower housing part 1000 of the battery pack is impacted, the lower housing part 100 collapses and absorbs energy, and partial impact force is absorbed by using the strength and rigidity of the lower housing part, so that the damage of the impact force to the battery module is reduced; on the other hand, the maximum moving position of the battery module is limited by the accommodating cavity 110, and the battery module is guaranteed not to be dislocated and move to the outside of the lower shell part 100 when the battery pack lower shell 1000 is impacted, so that the position of the battery module in the accommodating cavity 110 is stable, and the safety of the battery module is improved.
And place the battery module in holding chamber 110, when the inside liquid cooling system weeping of battery package or the battery package casing breaks and leads to inside into water, because of gravity reason, liquid can drip at the diapire that holds chamber 110, because be provided with many recessed guiding gutters 111 on the diapire that holds chamber 110, like this, liquid can continue to flow downwards and flow to guiding gutter 111 in, guiding gutter 111 is used for playing the guide effect to the flow of liquid, ensure that liquid can flow to preset position department, be convenient for the user more directly perceivedly confirm the weeping problem that current battery package takes place, thereby make corresponding safeguard measure rapidly, improve the security of battery module, especially when the battery module takes place the electrolyte weeping phenomenon, the user can discover the weeping problem in the short time, thereby reduce environmental pollution and resource waste.
It should be noted that the plurality of concave diversion trenches 111 can also play a role in increasing 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 beam 200, many supporting beam 200 are used for further increasing the structural strength of casing portion 100 down, and when casing 1000 collided under the battery package, many supporting beam 200 utilized self structural strength to absorb partial impact, and then reduced the damage value of impact to battery module, prolonged battery module's life. And the extending direction of the supporting beam 200 is different from the extending direction of the flow guide groove 111, so that the phenomenon that the supporting beam 200 covers the flow guide groove 111 and the flow guide groove 111 cannot guide the liquid normally is avoided, and the flow guide groove 111 can guide the leaked liquid to a specific position, so that a user can take corresponding measures in time.
It should be noted that, in the present application, the plurality of supporting beams 200 are provided to strengthen the structural strength of the lower casing part 100, so that the wall thickness of the lower casing part 100 can be correspondingly reduced, thereby reducing the weight of the lower casing part 100, realizing the light weight of the battery pack lower casing 1000, and facilitating the processing of the lower casing part 100 with a thinner thickness, so as to reduce the manufacturing difficulty.
Many supporting beams 200 will hold chamber 110 and divide into a plurality of minute body chambeies 112, every minute body chamber 112 all can be used for placing at least one battery module, divide body chamber 112 to provide installation space for battery module, and restricted battery module's the biggest shift position, when battery package casing 1000 receives striking or battery package casing 1000 down and takes place to rock, battery module can not misplace and move to battery package casing 1000's other positions, improve battery module's positional stability.
The first reinforcing protrusions 210 of the support cross member 200 are used to increase the structural strength of the support cross member 200 itself, so that when the battery pack lower case 1000 is impacted, the support cross member 200 collapses to absorb energy, thereby reducing the damage value of the impact force to the battery module; in a second aspect, the first reinforcing protrusion 210 is used to position the mounting position of the supporting beam 200, and after the mounting is completed, the first reinforcing protrusion 210 needs to extend into the flow guide groove 111, so that during the mounting process of the supporting beam 200, the mounting position of the supporting beam 200 can be quickly positioned by the first reinforcing protrusion 210, the assembly efficiency of the battery pack lower case 1000 is improved, and the assembly difficulty is reduced; in the third aspect, the first reinforcing protrusion 210 serves to increase a contact area of the supporting beam 200 with the bottom wall of the receiving cavity 110, so that the supporting beam 200 is positionally stabilized within the receiving cavity 110. The first reinforcing protrusion 210 extending into the flow guide groove 111 mainly means that the first reinforcing protrusion 210 is disposed in cooperation with the flow guide groove 111, wherein a sidewall of the first reinforcing protrusion 210 may contact with a sidewall of the flow guide groove 111 or may not contact with the sidewall of the flow guide groove 111, or the sidewall of the first reinforcing protrusion 210 contacts with a sidewall portion of the flow guide groove 111.
It can be understood, casing 1000 is for prior art under the battery package of this application, through setting up supporting beam 200 and strengthening casing portion 100's structural strength down, thereby can reduce casing portion 100's wall thickness down, still reduced casing portion 100's the manufacturing degree of difficulty when realizing casing portion 100 lightweight, and be equipped with many recessed guiding gutters 111 on the diapire that holds chamber 110, play the guide effect with the flow to liquid, when the inside weeping that takes place of battery package, convenience of customers in time discovers and makes corresponding measure, with the security that improves battery module.
Optionally, the lower housing part 100 includes a bottom wall and a plurality of side walls, which are arranged on the bottom wall in an end-to-end enclosing manner to form an accommodating cavity 110 with one side open, so as to facilitate the placement of the battery module. Wherein, the bottom wall of the receiving chamber 110 and the bottom wall of the lower housing portion 100 are formed as one structure, so that the provision of one structure is omitted, the production cost is saved, and the weight of the lower housing portion 100 is reduced.
Alternatively, when the sidewall of the first reinforcing protrusion 210 contacts the sidewall of the guide channel 111, the bottom wall of the first reinforcing protrusion 210 is spaced apart from the bottom wall of the guide channel 111 to facilitate the flow of the liquid.
In some embodiments of the present invention, as shown in fig. 1, the channels 111 extend along the length direction of the lower housing part 100, and a plurality of channels 111 are spaced in parallel along the width direction of the lower housing part 100. Because of being provided with multiunit battery module in the lower casing part 100, no matter the many guiding gutters 111 that set up along the width direction interval of lower casing part 100 guarantee that the weeping takes place in any position, all can be with the liquid water conservancy diversion of flow to the position department that sets up in advance, and carry out the water conservancy diversion along the extending direction of lower casing part 100.
The longitudinal direction of the lower housing portion 100 referred to herein means the front-rear direction of the lower housing portion 100 shown in fig. 1, that is, the guide grooves 111 extend in 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 beams 200 are extended in the width direction of the lower housing part 100, and both ends of the support beams 200 are connected to the side walls of the lower housing part 100. That is, the support beam 200 extends in the left and right direction of the lower case portion 100, and the guide grooves 111 extend in the length direction of the lower case portion 100, so that the support beam 200 extends in the width direction of the lower case portion 100, and thus, in the process of moving the battery pack lower case 1000, no matter the battery pack lower case 1000 is impacted in the width direction or in the length direction, the battery pack lower case 1000 can absorb partial impact force by using the structure and strength of the battery pack lower case 1000, and the damage value of the impact force to the battery module is reduced, thereby prolonging the service life of the battery module, and because both ends of the support beam 200 are respectively connected to the side walls of the lower case portion 100, thereby increasing the contact area between the support beam 200 and the lower case portion 100, ensuring the position stability of the support beam 200 relative to the lower case portion 100, and ensuring effective absorption of the impact force.
Alternatively, as shown in fig. 1, a plurality of support cross members 200 are provided in parallel at intervals along the length direction of the lower housing part 100. Because of many supporting beams 200 all connect in holding chamber 110, many supporting beams 200 that the interval set up can divide into a plurality of components of a whole that can function independently chambeies 112 holding chamber 110, provide the space of dodging for laying of battery module, ensure that battery module can place in components of a whole that can function independently chamber 112.
Optionally, the distance between the plurality of supporting beams 200 is not limited as long as it is ensured that the battery module can be placed at the interval formed between two adjacent supporting beams 200, and in order to place the battery module in the accommodating cavity 110 to the maximum, the battery module can be placed in the split cavity 112 transversely, or placed in the split cavity 112 longitudinally, so as to increase the endurance mileage of the battery pack.
Optionally, as shown in fig. 1, the battery pack lower case 1000 further includes a support edge beam 300, and the support edge beam 300 is coupled to an edge of the receiving cavity 110. It can also be understood that the supporting edge beam 300 is connected inside the accommodating cavity 110 and located at the edge of the accommodating cavity 110, and the supporting edge beam 300 is used for enhancing the structural strength of the lower shell part 100 and can play a role in collapsing and absorbing energy; on the other hand, the support edge beams 300 are used to shield the following confluence grooves 113, and ensure that the liquid inside the confluence grooves 113 is not splashed, thereby improving the safety of the battery pack lower case 1000.
Alternatively, the support edge beams 300 are extended in the width direction of the lower housing part 100, and both ends and one side of the support edge beams 300 are connected to the side walls of the lower housing part 100. For increasing the contact area between the support side rail 300 and the lower housing part 100 so that the support side rail 300 is positionally stabilized with respect to the lower housing part 100, thereby effectively reinforcing the structural strength of the lower housing part 100.
Alternatively, as shown in fig. 1, the support side members 300 and the support cross members 200 are disposed in parallel and spaced apart from each other along the length direction of the lower housing part 100. Make and to delimit a components of a whole that can function independently chamber 112 between support boundary beam 300 and the support crossbeam 200, be used for laying the battery module in the components of a whole that can function independently chamber 112 to the space in maximize utilization holds the chamber 110, in order to place abundant battery module, use the battery package of this application on the vehicle, in order to promote the continuation of the journey mileage of vehicle, promote user experience.
Optionally, as shown in fig. 4, a confluence groove 113 is further disposed on the bottom wall of the accommodating cavity 110, and the confluence grooves 113 are respectively communicated with the plurality of flow guide grooves 111. Many guiding gutters 111 are used for in liquid water conservancy diversion to the groove 113 that converges that will reveal, namely will reveal liquid water conservancy diversion to specific position, and convenience of customers more conveniently, directly perceivedly observes the battery package and whether the weeping phenomenon appears to in time make corresponding measure, with the security that improves battery module and avoid environmental pollution, wasting of resources.
In some examples, the height of the confluence groove 113 is lower than that of the guide groove 111, so that the liquid in the guide groove 111 can flow into the confluence groove 113, and the flowing speed of the liquid is increased, so that a user can find the liquid leakage in a short time and take corresponding measures.
Optionally, as shown in fig. 5, a second reinforcing protrusion 310 is disposed on a side of the bottom of the support edge beam 300 facing the diversion trench 111, the second reinforcing protrusion 310 extends into the diversion trench 111 and is in clearance fit with the diversion trench 111, and the support edge beam 300 shields the confluence trench 113. The second reinforcing protrusions 310 of the support side beams 300 are used for increasing the structural strength of the support side beams 300, so that when the battery pack lower case 1000 is impacted, the support side beams 300 collapse and absorb energy, and the damage value of impact force to the battery module is reduced; in the second aspect, the second reinforcing protrusion 310 is used for positioning the mounting position of the support boundary beam 300, and after the second reinforcing protrusion 310 is mounted in place, the second reinforcing protrusion 310 needs to extend into the flow guide groove 111, so that in the process of mounting the support boundary beam 300, the mounting position of the support boundary beam 300 can be quickly positioned by the second reinforcing protrusion 310, the assembly efficiency of the battery pack housing 1000 is improved, and the assembly difficulty is reduced; in the third aspect, the second reinforcing protrusion 310 is used to increase the contact area between the support side member 300 and the bottom wall of the accommodating cavity 110, so that the support side member 300 is positionally stable relative to the accommodating cavity 110, and the accommodating cavity 110 is formed in the lower housing part 100, and therefore, the support side member 300 is positionally stable relative to the lower housing part 100, and the structural strength of the lower housing part 100 is effectively enhanced.
In the description of the present invention, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between the described features, whether they are sequential or not.
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 fitted in the flow guiding groove 111, the second reinforcing protrusion 310 may obstruct the flow of the liquid, and the leaked liquid may not flow into the flow converging groove 113, therefore, the second reinforcing protrusion 310 is in clearance fit with the flow guiding groove 111 in the present application, so that the assembly efficiency of the battery pack lower case 1000 is improved, and meanwhile, the second reinforcing protrusion 310 may not obstruct the flow of the liquid, and the leaked liquid may flow into the flow converging groove 113 through the clearance between the second reinforcing protrusion 310 and the flow guiding groove 111.
Optionally, as shown in fig. 2, the first reinforcing protrusion 210 of the supporting beam 200 extends into the guiding gutter 111 and is in clearance fit with the guiding gutter 111, and the beneficial effects of the first reinforcing protrusion 310 of the supporting side beam 300 extending into the guiding gutter 111 and being in clearance fit with the guiding gutter 111 can be seen, which are not described herein again.
Optionally, as shown in fig. 4, the battery pack lower case 1000 further includes a leakage detecting sensor 400, and the leakage detecting sensor 400 is provided in the confluence groove 113 to detect whether leakage occurs. Adopt weeping detection sensor 400 to detect, just so need not user's visual observation for the weeping detects more timely, accurate, intelligence, and when the liquid that reveals flowed to the groove 113 that converges through guiding gutter 111, weeping detection sensor 400 will detect very fast.
Optionally, the battery pack lower case 1000 further includes a controller, the liquid leakage detection sensor 400 is electrically connected to the controller, when the liquid leakage detection sensor 400 detects that liquid exists in the confluence tank 113, the liquid leakage detection sensor 400 is used for outputting a detection signal to the controller, the controller is connected to an alarm unit, and after receiving the detection signal sent by the liquid leakage detection sensor 400, the controller controls the alarm unit to alarm to remind a user, so that the user can make a response measure in time.
Optionally, the weeping detects sensor 400 optional level sensor or other can detect the sensor that has liquid in the groove 113 that converges, and the specific type of sensor does not do the restriction, as long as guarantee when the inside liquid cooling system weeping of battery package or the battery package casing breaks and lead to inside intaking, liquid all can be by the water conservancy diversion to the groove 113 that converges, the weeping detect sensor 400 can in time detect can.
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 associated multi-stage support tables 220. The multi-stage support stages 220 are coupled to facilitate connection of the battery modules, on the one hand, and also to increase the structural strength of the support beam 200 itself, on the other hand, thereby effectively reinforcing the structural strength of the lower housing part 100.
Optionally, the supporting beam 200 is manufactured by an integral forming process, so that the manufacturing steps are simplified, and the integral supporting beam 200 can better transmit impact force, thereby avoiding the phenomenon that the supporting beam 200 is broken in the process of transmitting the impact force.
Alternatively, as shown in fig. 3, a battery mounting hole 221 is formed on the first stage supporting platform 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 of the battery module relative to the supporting beam 200 is ensured to be stable, that is, the position of the battery module in the lower housing part 100 is ensured to be stable; 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 portion 100, so that when the battery module is connected to the supporting beam 200 through the battery mounting holes 221, the battery module can be spaced from the bottom wall of the lower housing portion 100, thereby improving the heat dissipation effect of the battery module.
Alternatively, a fitting hole for fitting the battery mounting hole 221 is provided in the battery module, and the end of the battery module is connected to the support beam 200 by a connection member.
Alternatively, the connecting member is a bolt, as shown in fig. 3, a positioning member 2211 is disposed on one side of the battery mounting hole 221 close to the bottom wall of the lower housing portion 100, and the bolt sequentially passes through a matching hole on the battery module and the battery mounting hole 221 and is fixed on the positioning member 2211, so as to fixedly connect the battery module with the supporting beam 200.
Alternatively, the positioning member 2211 is a nut welded to one side of the battery mounting hole 221, and the bolt is fitted into the nut through the fitting hole and the battery mounting hole 221 in sequence.
Therefore, the battery module of the application 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 position of the battery module in the split cavity 112 is stable, the battery module cannot shake during the movement of 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 platform 220 located higher up. The lightening 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 on the other hand, the lightening 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 shell part 100 and the light weight of the lower shell part 100 can be realized.
In some examples, the top of the supporting platform 220 with a higher position is used for abutting against the upper shell of the battery pack, so that the contact area between the lower shell 1000 of the battery pack and the upper shell of the battery pack is increased, the overall position of the assembled battery pack is stable, and the battery module and other components arranged inside the battery pack can be effectively protected.
Optionally, as shown in fig. 1, the battery pack lower case 1000 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 the mounting brackets 500 are provided with connecting pieces 510 for connecting the side walls of the lower case portion 100. The mounting bracket 500 is used for connecting the supporting beam 200 on the lower case portion 100, and increases the contact area of the supporting beam 200 and the side wall of the lower case portion 100, so that the supporting beam 200 can be stably connected on the lower case portion 100, the position of the battery module can be effectively limited by the supporting beam 200 with stable position, the position stability of the battery module is improved, and when the battery pack lower case 1000 is impacted, the supporting beam 200 can transmit the impact force to the lower case portion 100 through the mounting bracket 500, and then the lower case portion 100 transmits the impact force to the vehicle body of the vehicle, thereby reducing the damage value of the impact force to the battery pack lower case 1000.
In the specific assembling process, the mounting bracket 500 is firstly connected to the supporting beam 200, then the mounting position of the supporting beam 200 is quickly located through the first reinforcing protrusion 210 on the supporting beam 200, and after the mounting position of the supporting beam 200 is determined, the supporting beam 200 is connected to the lower housing portion 100 through the connecting piece 510 on the mounting bracket 500, so that the supporting beam 200 is fixedly connected to the lower housing portion 100.
Alternatively, the mounting bracket 500 may be welded to the support beam 200 to improve the connection strength of the mounting bracket 500 to the support beam 200 such that the mounting bracket 500 is positionally stable relative to the support beam 200.
Alternatively, the coupling pieces 510 of the mounting bracket 500 may be welded to the sidewalls of the lower housing part 100 for improving the coupling strength between the mounting bracket 500 and the lower housing part 100.
Of course, the connection manner between the mounting bracket 500 and the supporting beam 200 and the lower housing portion 100 is not limited to the above welding, and may also be a connection manner such as bolting or riveting, as long as the relative position between the mounting bracket 500 and the supporting beam 200 and the lower housing portion 100 is stable, 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 plurality of mounting lugs 120 extending outward from the outer wall of the lower case portion 100, the mounting lugs 600 are connected to the bottom of the lower case portion 100, and the ends of the mounting lugs 600 are connected to the mounting lugs 120 by fasteners. The outer wall of the lower housing part 100 is a side wall of the lower housing part 100 away from the receiving 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 support 600 and the lower housing part 100 can be increased by the mounting lug 120, and the lifting lug support 600 and the lower housing part 100 can be stably connected.
Optionally, the end of the lifting lug support 600 is provided with a whole vehicle mounting hole, the lifting lug support 600 is connected to the vehicle body through the whole vehicle mounting hole, one side of the lifting lug support 600, which is far away from the whole vehicle mounting hole, is flanged downwards for being connected with the bottom of the lower housing part 100, and the flanging position is provided with a reinforcing rib to reinforce 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 and automobile body under the battery package to make casing 1000 under the battery package stable for the automobile body position, and when casing 1000 received the striking under the battery package, the impact accessible lug support 600 transmitted to the automobile body on, reduced the damage value of striking casing 1000 under to the battery package.
Alternatively, the mounting ears 120 are provided in the extending direction of the support beam 200. It can also be understood that the mounting lug 120 is arranged corresponding to the supporting beam 200, so arranged, when the battery pack lower shell 1000 is impacted, the supporting beam 200 collapses to absorb energy and transmit part of the impact force to the mounting lug 120, because one end of the lifting lug support 600 is connected to the mounting lug 120, the other end of the lifting lug support 600 is connected to the vehicle body, therefore, the impact force transmitted to the mounting lug 120 can be transmitted to the vehicle body through the lifting lug support 600, thereby reducing the damage value of the impact force to the battery pack lower shell 1000, and therefore, the service life of the battery module arranged inside the battery pack lower shell 1000 can be prolonged, and the safety of the battery module can be improved.
It should be noted that, as shown in fig. 1, when the two supporting beams 200 are closer to each other, one end of the two supporting beams 200 may share one mounting lug 120, so as to reduce the number of mounting lugs 120, and at the same time, reduce the number of lifting lug supports 600, thereby achieving the light weight of the battery pack lower case 1000.
Alternatively, the mounting lugs 120 and the lower case portion 100 are formed as an integral structure, that is, the lower case portion 100 and the mounting lugs 120 are formed by an integral molding process during the production of the battery pack lower case 1000, so that the aforementioned steps of welding, fixing, etc. are omitted, and the mounting lugs 120 can be secured in a stable position with respect to the lower case portion 100.
Of course, in other examples, the mounting lug 120 and the lower housing part 100 may be formed as two separate structures, the mounting lug 120 is welded to the lower housing part 100 during the assembly of the battery pack lower housing part 1000, the welding connection may also ensure the connection strength between the mounting lug 120 and the lower housing part 100, and by providing two separate structures, the position of the mounting lug 120 may be selectively set during the assembly, so as to ensure that the impact force may be transmitted to the vehicle body through the mounting lug 120 and the shackle bracket 600.
Optionally, as shown in fig. 5, the battery pack lower case 1000 further includes a connection sleeve 700 and a shackle reinforcement plate 610, the connection sleeve 700 being disposed between the mounting lug 120 and the shackle bracket 600. It can be understood that, at least a part of the structure of the shackle bracket 600 is spaced apart from the mounting lug 120, and the connection sleeve 700 is disposed between the mounting lug 120 and the shackle bracket 600, on one hand, the connection sleeve 700 can play a role in supporting the mounting lug 120 and the shackle bracket 600, 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 role in guiding, so that the end portion of the lifting lug support 600 can be connected with the installing lug 120 through the fastener, and meanwhile, when the fastener is tightened, the lifting lug support 600 and the installing lug 120 are prevented from being deformed due to extrusion, so that the battery pack lower shell 1000 is reliably connected with the vehicle body.
Optionally, the shackle reinforcing plate 610 is coated on the outer wall of the shackle bracket 600. The shackle reinforcing plate 610 serves to reinforce the structural strength of the shackle bracket 600, thereby ensuring that the battery pack lower case 1000 can be stably coupled to the vehicle body through the shackle bracket 600.
Optionally, fasteners connect mounting ear 120, connecting sleeve 700, shackle bracket 600, and shackle reinforcing plate 610. In the specific assembling process, the mounting lug 120, the connecting sleeve 700, the lifting lug support 600 and the lifting lug reinforcing plate 610 are all provided with avoiding holes for avoiding fasteners, and the fasteners sequentially penetrate through the avoiding holes to be connected with the vehicle body.
Optionally, the fastening member is a fastening bolt, a threaded hole matched with the fastening member is formed in the vehicle body, and the fastening bolt sequentially penetrates through the avoidance holes in the mounting lug 120, the connecting sleeve 700, the lifting lug support 600 and the lifting lug reinforcing plate 610 to be fixedly connected to the vehicle body.
Alternatively, as shown in fig. 6, the battery pack lower case 1000 further includes a side sill reinforcing plate 800 and a cross member reinforcing plate 900, the side sill reinforcing plate 800 being provided at the outer side edge of the lower case portion 100. The side sill reinforcing plate 800 serves to further reinforce the structural strength of the lower housing part 100, so that the lower housing part 100 can effectively protect the battery module.
Optionally, the edge beam stiffener 800 is contoured to the flanging surface of the lower housing portion 100 to attach the edge beam stiffener 800 to the lower housing portion 100 and increase the strength of the attachment of the edge beam stiffener 800 to the lower housing portion 100.
Optionally, the boundary beam reinforcing plates 800 include a front boundary beam reinforcing plate 800 and a rear boundary beam reinforcing plate 800, and the left and right boundary beam reinforcing plates 800, wherein the front and rear boundary beam reinforcing plates 800 and the left and right boundary beam reinforcing plates 800 are sequentially connected end to form the boundary beam reinforcing plate 800, the front and rear boundary beam reinforcing plates 800 are respectively located at the front and rear outer edges of the lower housing portion 100, and the left and right boundary beam reinforcing plates 800 are respectively located at the left and right outer edges of the lower housing portion 100.
Alternatively, the front and rear two side sill reinforcing plates 800 and the left and right two side sill reinforcing plates 800 are welded by resistance welding to form the side sill reinforcing plates 800. So that the front and rear two side sill reinforcing plates 800 and the left and right two side sill reinforcing plates 800 are stable in relative position.
Alternatively, as shown in fig. 3 and 6, the extending direction of the beam reinforcing plate 900 is the same as the extending direction of the supporting beam 200, and the horizontal projection position of the beam reinforcing plate 900 on the lower housing part 100 is the same as the horizontal projection position of the supporting beam 200 on the lower housing part 100. It can also be understood that the cross beam reinforcing plate 900 is disposed corresponding to the supporting cross beam 200, and the cross beam reinforcing plate 900 is disposed corresponding to the supporting cross beam 200 at 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 stable and reliable structure of the lower housing portion 100, avoiding the problems of resonant abnormal sound and durable cracking of the lower housing portion 100 during the driving process, and further influencing the normal operation of the battery module to cause inconvenience in driving.
Alternatively, the support cross member 200 and the cross member reinforcing plate 900 are both connected to the lower case portion 100 by resistance welding, increasing the strength of connection of the support cross member 200 and the cross member reinforcing plate 900 to the lower case portion 100.
In some embodiments of the present invention, the lower housing portion 100 is formed from a high ductility steel sheet. Because of lower casing part 100 mainly used sealed battery module, and lower casing part 100's area is great, consequently, can reduce casing part 100's the structure degree of difficulty with lower casing part 100 adoption high ductility steel sheet is made for lower casing part 100 can adopt integrated into one piece technology to make, and high ductility steel sheet quality is light, can realize lower casing part 100's lightweight.
The high-ductility steel sheet as referred to herein is mainly a steel sheet having an elongation after fracture of 30% or more, 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 machined from high strength steel plate. Because of many supporting beams 200 mainly are the weight of bearing battery module and strengthen the structural strength of casing portion 100 down, consequently, this application adopts high strength steel board to make many supporting beams 200, can strengthen many supporting beams 200's structural strength to improve many supporting beams 200 self structural strength, with the structural strength and the structural stability of casing portion 100 down of effectively strengthening.
Optionally, the supporting side beams 300, the mounting brackets 500, the lifting lug brackets 600, the connecting sleeves 700, the side beam reinforcing plates 800 and the cross beam reinforcing plates 900 can be formed by machining high-strength steel plates, so that the structural strength of the battery pack lower shell 1000 is further improved.
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 also be formed by machining a high-strength steel plate, so as to increase the structural strength of the mounting lug 120 and ensure that the shackle bracket 600 can be stably coupled to the mounting lug 120.
Optionally, the high-strength steel plate is mainly a steel plate with a tensile strength of 550 to 1200Mpa, so as to improve the structural strength of the supporting cross beam 200, the supporting side beam 300, the mounting bracket 500, and the like.
It should be emphasized that, the present application sets the battery pack lower case 1000 to be made of different materials, wherein the supporting beams 200, the supporting edge beams 300, the edge beam reinforcing plates 800, the beam reinforcing plates 900, and the like, which are mainly used for bearing the battery module, are structurally set as high-strength steel plates, the lower case 100, which is mainly used for sealing the battery module, is set as a high-ductility steel plate, and then the thickness of the steel plate is effectively reduced through structural design (such as the provision of the diversion grooves 111 and the setting of the supporting beams 200 to be formed by the multi-stage supporting tables 220, and the like), wherein the thickness of the supporting beams 200 can be reduced to 1.0mm, and the thickness of the lower case 100 can be reduced to 0.8mm, so that the battery pack lower case 1000 of the present application can be reduced by 30% -40% compared to the lower case made of the conventional sheet metal material, so that the battery pack lower case 1000 of the present application is equivalent to the lower case made of the aluminum alloy material, the battery pack lower case 1000 of the present application is ensured to be lightweight while improving structural strength.
The following describes a battery pack according to an embodiment of the present invention.
A battery pack according to an embodiment of the present invention includes: battery module, battery pack upper case and battery pack lower case 1000.
Wherein, battery package lower casing 1000 is aforementioned battery package lower casing 1000, and battery package upper casing is connected on battery package lower casing 1000 in order to shield the uncovered, and the battery module loads in components of a whole that can function independently chamber 112.
As can be seen from the above-described structure, the battery pack according to the embodiment of the present invention employs the aforementioned battery pack lower case 1000, the battery modules are loaded in the separate cavities 112, to limit the position of the battery module, so as to ensure that the battery module will not shake when the battery pack is moved or impacted, and the upper case of the battery pack and the lower case of the battery pack 1000 are matched to protect the battery module, ensure that sharp objects outside do not touch the battery module, prolong the service life of the battery module, when the liquid cooling system in the battery pack leaks or the battery pack shell is broken to cause internal water inflow, the plurality of flow guide grooves 111 on the battery pack lower shell 1000 are used for limiting the flow direction of the liquid and guiding the liquid to a preset position, the leakage can be timely found by a user, the safety of the battery module is further improved, and the environmental pollution and the resource waste are reduced as much as possible.
Alternatively, as shown in fig. 5, the sidewall of the battery pack lower case 1000 is flanged and provided with a boss 130, and a nut hole is formed on the boss 130. The fixing member is fitted with the nut hole to connect the pack upper case to the pack lower case 1000 to shield the opening.
At the in-process of concrete assembly, casing and battery package casing 1000 carry out prepositioning through the nut hole earlier on the battery package, and rethread mounting is connected, and last casing welding is on battery package casing 1000 again for the battery package forms the confined structure, with effective protection battery module.
The specific structure of the battery pack lower case 1000 and the battery pack having the same according to the exemplary embodiment of the present invention will be described below with reference to the accompanying drawings. The embodiments of the present invention may be all embodiments obtained by combining the foregoing technical solutions, and 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, comprising: a lower housing portion 100 and four support cross members 200.
As shown in fig. 1, an open receiving cavity 110 is formed on the lower housing portion 100, and seven concave guiding grooves 111 are formed on a bottom wall of the receiving cavity 110.
As shown in fig. 1, the extending direction of the four supporting beams 200 is arranged at an angle to the extending direction of the guiding gutter 111, the four supporting beams 200 are connected in the accommodating cavity 110 to divide the accommodating cavity 110 into five divided cavities 112, and the divided cavities 112 are suitable for arranging battery modules.
As shown in fig. 2, a side of the support beam 200 facing the flow guide groove 111 is provided with a first reinforcing protrusion 210, and the first reinforcing protrusion 210 extends into the flow guide groove 111.
Example 2
The utility model provides a battery package casing 1000, on embodiment 1's basis, as shown in figure 1, battery package casing 1000 still includes supports boundary beam 300 and weeping detection sensor 400, support boundary beam 300 and connect the edge at holding chamber 110, still be equipped with confluence groove 113 on the diapire at holding chamber 110, confluence groove 113 communicates seven guiding gutter 111 respectively, the bottom of supporting boundary beam 300 is equipped with the second towards one side of guiding gutter 111 and strengthens protruding 310, the second is strengthened protruding 310 and is stretched into in guiding gutter 111 and with guiding gutter 111 clearance fit, support boundary beam 300 will converge groove 113 and shield.
The leakage detecting sensor 400 is provided in the confluence tank 113 to detect leakage.
Example 3
On the basis of embodiment 1, as shown in fig. 5, the battery pack lower casing 1000 further includes a lifting lug support 600, a connecting sleeve 700 and a lifting lug reinforcing plate 610, eight mounting lugs 120 are outwardly extended from the outer wall of the lower casing part 100, the lifting lug support 600 is connected to the bottom of the lower casing part 100, and the end of the lifting lug support 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 through a fastener.
Example 4
In addition to embodiment 3, as shown in fig. 6, the battery pack lower case 1000 further includes a side beam reinforcing plate 800 and a cross beam reinforcing plate 900, wherein the side beam reinforcing plate 800 is provided at the outer edge of the lower case portion 100.
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 case portion 100 coincides with the horizontal projection position of the support beam 200 on the lower case portion 100.
Example 5
A battery pack lower case 1000, comprising: battery module, battery pack upper case and battery pack lower case 1000.
Wherein, the battery pack lower case 1000 is the battery pack lower case 1000 in embodiment 1, the battery pack upper case is connected to the battery pack lower case 1000 to shield the opening, and the battery module is loaded in the split cavity 112.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The detection principle of the battery pack lower case 1000 according to the embodiment of the present invention and other components of the battery pack having the same, such as the leakage detecting sensor 400, is known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the terms "embodiment," "example," etc., mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery pack lower case, comprising:
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 extending directions of the plurality of supporting beams and the extending direction of the diversion trench are arranged at an angle; the supporting cross beams are connected in the accommodating cavity so that the accommodating cavity is divided into a plurality of separated cavities, and the separated 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.
2. The battery pack lower case according to claim 1, wherein the flow guide grooves extend in the length direction of the lower case portion, and a plurality of the flow guide grooves are arranged in parallel at intervals in the width direction of the lower case portion; the supporting cross beams extend along the width direction of the lower shell part, and two ends of each supporting cross beam are connected to the side walls of the lower shell part; the plurality of supporting beams are arranged in parallel at intervals along the length direction of the lower shell part.
3. The lower battery pack case according to claim 2, further comprising a support edge beam and a leakage detection sensor, wherein a collection groove is further formed in the bottom wall of the accommodating cavity, the collection grooves are respectively communicated with the plurality of guide grooves, the support edge beam is connected to the edge of the accommodating cavity, a second reinforcing protrusion is arranged on one side, facing the guide grooves, of the bottom of the support edge beam, the second reinforcing protrusion extends into the guide grooves and is in clearance fit with the guide grooves, and the support edge beam shields the collection groove;
the liquid leakage detection sensor is arranged in the confluence groove to detect whether liquid leakage occurs or not.
4. The battery pack lower casing according to claim 1, wherein the cross section of the supporting beam is stepped, the supporting beam comprises a plurality of stages of supporting tables connected with each other, wherein a battery mounting hole is formed on one stage of the supporting tables; and lightening holes are formed in the supporting platform at the higher position.
5. The lower battery pack case according to claim 4, further comprising a plurality of mounting brackets arranged in pairs, wherein two of the mounting brackets in each pair are connected to two ends of one of the supporting beams, and the mounting brackets are provided with connecting pieces for connecting the side walls of the lower case portion.
6. The battery pack lower casing according to claim 1, further comprising a plurality of mounting lugs extending outward from the outer wall of the lower casing, wherein the mounting lugs are connected to the bottom of the lower casing, and the ends of the mounting lugs are connected to the mounting lugs through fasteners.
7. The battery pack lower case according to claim 6, further comprising a connecting sleeve and a lifting lug reinforcing plate, wherein the mounting lug is disposed in an extending direction of the supporting beam, the connecting sleeve is disposed between the mounting lug and the lifting lug support, the lifting lug reinforcing plate is wrapped on an outer wall of the lifting lug support, and the fastening member connects the mounting lug, the connecting sleeve, the lifting lug support and the lifting lug reinforcing plate.
8. The battery pack lower case according to claim 6, further comprising a side sill reinforcing plate and a cross member reinforcing plate, the side sill reinforcing plate being provided at an outer edge of the lower case; 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 superposed with the horizontal projection position of the supporting beam on the lower shell part.
9. The battery pack lower case according to claim 1, wherein the lower case part is formed by machining a high-ductility steel plate, and the plurality of support beams are formed by machining a high-strength steel plate.
10. A battery pack, comprising:
a battery module;
the battery pack is provided with a shell;
the lower battery pack shell according to any one of claims 1 to 9, wherein the upper battery pack shell is connected to the lower battery pack shell to cover the opening, and the battery module is loaded in the split cavity.
CN202110885165.1A 2021-08-03 2021-08-03 Battery pack lower shell and battery pack with same Active CN113690525B (en)

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