CN116093512A - Battery pack and automobile - Google Patents

Battery pack and automobile Download PDF

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Publication number
CN116093512A
CN116093512A CN202310067162.6A CN202310067162A CN116093512A CN 116093512 A CN116093512 A CN 116093512A CN 202310067162 A CN202310067162 A CN 202310067162A CN 116093512 A CN116093512 A CN 116093512A
Authority
CN
China
Prior art keywords
frame
battery pack
battery
cells
cell
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.)
Pending
Application number
CN202310067162.6A
Other languages
Chinese (zh)
Inventor
黄红光
李德壮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GAC Aion New Energy Automobile Co Ltd
Original Assignee
GAC Aion New Energy Automobile Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GAC Aion New Energy Automobile Co Ltd filed Critical GAC Aion New Energy Automobile Co Ltd
Priority to CN202310067162.6A priority Critical patent/CN116093512A/en
Publication of CN116093512A publication Critical patent/CN116093512A/en
Pending legal-status Critical Current

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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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The application belongs to the technical field of energy storage equipment, and provides a battery pack and an automobile, wherein the battery pack comprises a lower shell frame, a plurality of electric cores and connecting pieces; the lower shell frame is internally provided with a containing cavity in a surrounding mode, the lower shell frame comprises a first frame and a second frame which are oppositely arranged, and supporting plates are arranged on the first frame and the second frame in a protruding mode towards the containing cavity; at least two electric core is connected in order and electrically conducts the intercommunication, the connecting piece cup joints two the junction of electric core is formed with electric core unit, and a plurality of electric core unit sets up side by side hold the intracavity, just electric core unit's both ends set up respectively first frame, second frame on the supporting plate. The cross beam structure is not required to be arranged in the battery pack frame, so that the volume of the battery pack can be made smaller, the optimal layout of the internal space of the battery pack, the weight and the application cost can be controlled conveniently, and meanwhile, the battery pack can be mounted and applied more conveniently on the whole vehicle.

Description

Battery pack and automobile
Technical Field
The application belongs to energy storage equipment technical field, and specifically relates to a battery pack and car.
Background
The battery cells of the existing power battery are all placed on the lower bottom plate of the battery pack lower shell, and support is mainly provided through the lower bottom plate, so that the lower bottom plate needs to have enough strength and rigidity. Along with the continuous improvement of the energy density requirement of the battery cells, the current battery pack lower shell needs to be thickened greatly under the conditions that all the battery cells can be stacked without deformation and the strength is not damaged, so that the weight and the cost of the lower shell are not increased, and the application of a CTP (Cell To Pack) integrated mode is not facilitated.
Disclosure of Invention
In order to overcome the defects in the prior art, the application aims to provide a battery pack and an automobile, which can control the weight and the application cost of the battery pack on the basis of not changing the energy density of a battery core and improve the economic benefit.
The technical means adopted for solving the technical problems are as follows:
the application provides a battery pack, which comprises a lower shell frame, a plurality of electric cores and connecting pieces;
the lower shell frame is internally provided with a containing cavity in a surrounding mode, the lower shell frame comprises a first frame and a second frame which are oppositely arranged, and supporting plates are arranged on the first frame and the second frame in a protruding mode towards the containing cavity;
the battery cell comprises a battery cell anode and a battery cell cathode which are respectively arranged at two ends of the battery cell, at least two battery cells are sequentially connected and in conductive communication, a connecting piece is sleeved at the joint of the two battery cells to form a battery cell unit, a plurality of battery cell units are arranged in the accommodating cavity side by side, and two ends of the battery cell units are respectively arranged on the bearing plates of the first frame and the second frame.
In the implementation process, the two electric cores are connected, and the connecting piece is arranged at the connecting position of the two electric cores, so that the connecting strength between the two electric cores can be enhanced through the connecting piece, the formed electric core units can be directly arranged on the first frame and the second frame, at the moment, the electric core units are energy bodies and can serve as structural members, and a stress system is formed by the electric core units, the first frame and the second frame; compared with the lower shell frame in the prior art, the cross beam structure is not required to be arranged in the frame, so that the volume of the battery pack can be smaller, the optimal layout of the internal space of the battery pack, the weight and the application cost can be controlled conveniently, and meanwhile, the battery pack can be mounted and applied on the whole vehicle more conveniently.
Preferably, the positive electrode and the negative electrode of the battery cells between two adjacent battery cells are welded.
Preferably, the connecting piece is a cylindrical structural piece, and the shape of the inner cavity of the connecting piece is matched with the shape of the section of the battery cell.
Preferably, the length of the connecting piece is larger than the width of a gap formed at the connecting position of the two battery cells.
Preferably, the connecting piece is provided with a glue injection hole.
Preferably, a space surrounded by the connection part of the two electric cores and the connecting piece is filled with structural adhesive.
In the implementation process, structural adhesive is filled in the space surrounded by the connection part of the two electric cores and the connecting piece, so that the connection strength between the electric cores and the connecting piece can be further enhanced.
Preferably, the connectors between two adjacent battery cells are in contact with each other.
In the implementation process, a gap can be formed between the two battery core units based on the arranged connecting piece, and the formed gap is used for reserving an expansion space required by the battery core during charging and discharging, so that the service life of the battery core can be prolonged conveniently.
Preferably, the number of the battery cells arranged on the battery cell unit is 2-3.
Preferably, a lower bottom plate and an upper cover plate are further arranged, the lower bottom plate is arranged at the bottom of the lower shell frame, and the upper cover plate is arranged at the top of the lower shell frame in a covering manner.
Also provided herein is an automobile having disposed therein a battery pack as described above.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a prior art battery pack frame.
Fig. 2 is a schematic structural diagram of a cell unit of the present application.
Fig. 3 is a schematic diagram of the composition structure of the cell unit of the present application.
Fig. 4 is a schematic structural diagram of the Shen Qingdian core unit after assembly.
Fig. 5 is a schematic structural view of the lower housing frame of the present application.
Fig. 6 is a schematic view of an assembled structure of the battery pack of the present application.
Marking:
1-cell, 10-cell unit;
2-connecting pieces and 21-glue injection holes;
3-lower shell frame, 30-accommodating cavity, 31-front beam assembly, 32-back beam assembly, 33-first frame, 34-second frame, 35-bearing plate, 36-lower bottom plate, 37-upper cover plate;
4-battery pack frame, 41-cross beam.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. In addition, embodiments of the present application and features of the embodiments may be combined with each other without conflict. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, and the described embodiments are merely some, rather than all, embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
It should be noted that: unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 2 to 6, a battery pack is provided in this embodiment, which includes a plurality of battery cells 1, a connecting member 2, and a lower case frame 3.
The battery cell 1 is a battery cell in the current production application, the section of the battery cell 1 is rectangular, the length of the battery cell is 600mm, and the positive electrode and the negative electrode of the battery cell are respectively arranged at two ends of the battery cell 1. Conventionally, there is a scheme of directly placing the battery cell 1 on the bottom plate of the battery pack, so that the thickness of the bottom plate needs to be made thicker, and the overall weight of the battery pack is also increased. In order to alleviate the effects of this, there is another solution, such as mounting the battery cell 1 on the battery pack frame 4 as shown in fig. 1; at this time, a cross beam 41 is disposed inside the battery pack frame 4, and four sections are formed inside the battery pack frame 4 by dividing the cross beam 41, so that the battery cells 1 can be stored conveniently, and the bottom plate does not directly participate in bearing. The cross beam 41 directly occupies the space inside the battery pack frame 4, and the weight of the cross beam 41 itself increases the weight of the entire battery pack.
Based on this, in this embodiment, at least two of the electric cores 1 are sequentially connected in a "one" shape, for example, the negative electrode of one of the electric cores 1 is connected to the positive electrode of the other electric core 1, and the two electric cores 1 are electrically connected to each other; at this time, the connector 2 is sleeved at the junction of the two battery cells 1 to form a battery cell unit 10.
As a preferred solution, in this embodiment, the number of the battery cells 1 disposed on the battery cell 10 is 2-3 based on the actual stress situation and the molding size of the battery pack after the battery cell 10 is integrated.
Further, the positive electrode and the negative electrode of the adjacent two cells 1 are connected in a welding manner, so that the two cells 1 can have certain connection strength after being connected, and the welding manner can be convenient for realizing conductive communication between the positive electrode and the negative electrode of the cell.
As a preferable solution, in this embodiment, the connecting piece 2 is configured as a cylindrical structural member, and the shape of the inner cavity of the connecting piece 2 is adapted to the shape of the section of the electrical core 1, for example, the connecting piece 2 is configured as a rectangle, so that after the connecting piece 2 is sleeved on the electrical core unit 10, the connecting piece 2 and the electrical core 1 can be more attached to each other.
Further, the length of the connecting piece 2 is set to be greater than the width of the gap formed at the connection position of the two electric cores 1, so that the end parts of the two electric cores 1 are both partially extended into the connecting piece 2, at the moment, the connecting piece 2 can be used for enhancing the connection strength between the two electric cores 1, and meanwhile, the stress condition between the connecting piece 2 and the electric cores 1 is better.
In addition, in this embodiment, the connecting piece 2 is provided with the glue injection hole 21, and the space surrounded by the connecting part of the two electric cores 1 and the connecting piece 2 is filled with the structural glue through the glue injection hole 21, so as to increase the bonding area between the two electric cores 1 and between the electric cores 1 and the connecting piece 2, thereby further strengthening the connection strength between the electric cores 1 and between the electric cores 1 and the connecting piece 2.
As a preferred solution, the lower housing frame 3 in this embodiment includes a front beam assembly 31, a rear beam assembly 32, a first rim 33, and a second rim 34; the front beam assembly 31, the rear beam assembly 32, the first frame 33 and the second frame 34 enclose an accommodating cavity 30 therebetween, the first frame 33 and the second frame 34 are disposed parallel to each other on two sides of the lower housing frame 3, and a supporting plate 35 is disposed on the first frame 33 and the second frame 34 and protrudes toward the accommodating cavity 30.
Further, a plurality of the battery cells 10 are disposed in the accommodating cavity 30 side by side, and two ends of the battery cells 10 are disposed on the supporting plates 35 of the first frame 33 and the second frame 34, respectively. The battery cell unit 10 is directly arranged on the first frame 33 and the second frame 34, and at the moment, the battery cell unit 10 is an energy body and simultaneously acts as a structural member, and a stress system is formed by a plurality of battery cell units 10 and the first frame 33 and the second frame 34 together; compared with the prior art, the cross beam 41 structure is not required to be arranged in the frame, so that the volume of the battery pack can be smaller on the basis of the same battery energy density; and can have a higher battery energy density based on the same battery pack volume. The battery pack is convenient to optimally layout the space inside the battery pack, the weight and the application cost of the whole pack are controlled, and meanwhile, the battery pack can be more conveniently installed and applied on the whole car.
As a preferred solution, when a plurality of the battery cells 10 are installed in the accommodating cavity 30, the side surfaces of the connecting pieces 2 between two adjacent battery cells 10 are in contact with each other. At this time, a gap may be formed between the two battery cells 10 based on the connecting member 2, and the expansion space required by the battery cells 1 during charging and discharging is reserved through the formed gap, so that the service life of the battery cells 1 may be conveniently prolonged.
As an application example thereof, in the present embodiment, the thickness of the connection member 2 is set to 1-2mm so that the gap formed by the two battery cells 10 after installation has a width of 2-4 mm; thereby, the width of the gap formed between the two cell units 10 can be controlled by selecting the thickness of the connection member 2.
As a preferred solution, in this embodiment, a lower bottom plate 36 and an upper cover plate 37 are further disposed corresponding to the lower housing frame 3, where the lower bottom plate 36 is disposed at the bottom of the lower housing frame 3, and the upper cover plate 37 is disposed on the top of the lower housing frame 3 in a covering manner. The lower bottom plate 36 and the upper cover plate 37 are arranged to seal and protect the upper end and the lower end of the battery cell unit 10 installed in the accommodating cavity 30, so as to form a whole package structure.
In addition, the battery pack mainly benefits from the battery pack, and the automobile is further provided in the embodiment. The battery pack is installed and applied to the automobile, so that the space occupation and the weight of the battery pack on the whole automobile can be effectively reduced under the condition of the same energy density; under the condition of the same space occupation, the battery energy density can be conveniently improved when the whole vehicle is used, and the application benefit can be better.
The foregoing is merely a specific embodiment of the present application and is not intended to limit the scope of the present application, and various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application. Variations and substitutions will be readily apparent to those skilled in the art within the scope of the present disclosure, and are intended to be included within the scope of the present disclosure. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims (10)

1. The battery pack is characterized by comprising a lower shell frame, a plurality of battery cells and connecting pieces;
the lower shell frame is internally provided with a containing cavity in a surrounding mode, the lower shell frame comprises a first frame and a second frame which are oppositely arranged, and supporting plates are arranged on the first frame and the second frame in a protruding mode towards the containing cavity;
the battery cell comprises a battery cell anode and a battery cell cathode which are respectively arranged at two ends of the battery cell, at least two battery cells are sequentially connected and in conductive communication, a connecting piece is sleeved at the joint of the two battery cells to form a battery cell unit, a plurality of battery cell units are arranged in the accommodating cavity side by side, and two ends of the battery cell units are respectively arranged on the bearing plates of the first frame and the second frame.
2. The battery pack of claim 1, wherein the cell anodes between adjacent cells are welded to the cell cathodes.
3. The battery pack according to claim 1 or 2, wherein the connecting member is a cylindrical structural member, and the shape of the inner cavity of the connecting member is adapted to the shape of the section of the battery cell.
4. The battery pack of claim 3, wherein the length of the connector is greater than the width of the gap formed at the junction of the two cells.
5. The battery pack of claim 4, wherein the connector is provided with glue injection holes.
6. The battery pack according to claim 5, wherein a space defined by the connection between the two cells and the connecting member is filled with a structural adhesive.
7. The battery pack according to claim 1 or 6, wherein the connection members between adjacent two of the battery cells are in contact with each other.
8. The battery pack of claim 7, wherein the number of cells provided on the cell unit is 2-3.
9. The battery pack according to claim 8, further comprising a lower plate provided at a bottom of the lower housing frame and an upper cover plate provided at a top of the lower housing frame in a covering manner.
10. An automobile in which a battery pack as claimed in any one of claims 1 to 9 is provided.
CN202310067162.6A 2023-01-30 2023-01-30 Battery pack and automobile Pending CN116093512A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310067162.6A CN116093512A (en) 2023-01-30 2023-01-30 Battery pack and automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310067162.6A CN116093512A (en) 2023-01-30 2023-01-30 Battery pack and automobile

Publications (1)

Publication Number Publication Date
CN116093512A true CN116093512A (en) 2023-05-09

Family

ID=86186643

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310067162.6A Pending CN116093512A (en) 2023-01-30 2023-01-30 Battery pack and automobile

Country Status (1)

Country Link
CN (1) CN116093512A (en)

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