CN113851775A - Battery package and have its vehicle - Google Patents

Battery package and have its vehicle Download PDF

Info

Publication number
CN113851775A
CN113851775A CN202111011592.3A CN202111011592A CN113851775A CN 113851775 A CN113851775 A CN 113851775A CN 202111011592 A CN202111011592 A CN 202111011592A CN 113851775 A CN113851775 A CN 113851775A
Authority
CN
China
Prior art keywords
battery pack
cells
group
battery
support
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
CN202111011592.3A
Other languages
Chinese (zh)
Inventor
曾士哲
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.)
Weilai Automobile Technology Anhui Co Ltd
NIO Technology Anhui Co Ltd
Original Assignee
Weilai Automobile Technology Anhui 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 Weilai Automobile Technology Anhui Co Ltd filed Critical Weilai Automobile Technology Anhui Co Ltd
Priority to CN202111011592.3A priority Critical patent/CN113851775A/en
Priority to PCT/CN2021/126091 priority patent/WO2023029174A1/en
Publication of CN113851775A publication Critical patent/CN113851775A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/267—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders having means for adapting to batteries or cells of different types or different sizes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention is applied to the field of batteries and provides a battery pack. The battery pack comprises a support portion which provides structural support for the battery pack. The battery pack also includes a battery cell assembly, wherein a portion of the battery cell assembly is located inside the support. In addition, the invention also provides a vehicle with the battery pack. The battery cell is arranged in the space inside the supporting part, so that the space utilization rate of the battery pack is improved, and the energy density of the battery pack is improved.

Description

Battery package and have its vehicle
Technical Field
The application relates to the field of batteries, in particular to a battery pack and a vehicle with the same.
Background
With the development of new energy vehicles, particularly pure electric vehicles, power batteries are more and more concerned as core components of electric vehicles.
The energy density of the power battery, as an important performance index, directly affects the endurance mileage of the electric vehicle. How to improve the energy density of the power battery is a hot spot and a focus of intense attention of those skilled in the relevant field. On one hand, the power battery includes lithium iron phosphate system, ternary lithium system, nickel-hydrogen system, etc. according to the chemical system. Each of these systems has its advantages and disadvantages. On the other hand, the power battery includes a cylindrical structure, a blade-type structure, a square-shell-type structure, a pouch-type structure, and the like, according to the structural configuration. In the existing power battery, a single system battery cell with a single structure is often configured in one battery pack, thereby facilitating mass production and unified control.
The above information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
Disclosure of Invention
According to an aspect of the present application, there is provided a battery pack. The battery pack comprises a support portion which provides structural support for the battery pack. The battery pack also includes a battery cell assembly, wherein a portion of the battery cell assembly is located inside the support.
Alternatively or additionally to the above, in the battery pack according to an embodiment of the present invention, the battery core assembly includes a first group of battery cells and a second group of battery cells, and the first group of battery cells adopts a first structure; and the second group of battery cells adopt a second structure and are positioned inside the supporting part, wherein the first structure is different from the second structure.
Alternatively or additionally to the above, in a battery pack according to an embodiment of the present invention, the first structure or the second structure includes one or more of: cylindrical structure, blade type structure, square shell type structure and soft package type structure.
Alternatively or additionally to the above, in a battery pack according to an embodiment of the present invention, the support portion includes one or more of: the cross beam, the longitudinal beam and the edge beam of the battery pack.
Alternatively or additionally to the above, in the battery pack according to an embodiment of the present invention, the second group of cells is fixed to the inside of the support portion through the opening portion of the support portion.
Alternatively or additionally to the above, in the battery pack according to an embodiment of the present invention, the second group of battery cells is fixed inside the support portion via a structural adhesive.
Alternatively or additionally to the above, in a battery pack according to an embodiment of the invention, the first group of cells or the second group of cells employ one or more of: lithium iron phosphate cell, ternary lithium cell and nickel-hydrogen cell.
Alternatively or additionally to the above, in the battery pack according to an embodiment of the present invention, the electric core assembly is disposed in all or a part of the inside of the support part.
Alternatively or additionally to the above, in a battery pack according to an embodiment of the present invention, the case includes the support portion.
According to another aspect of the present application, there is provided a vehicle including any one of the foregoing battery packs.
Drawings
The above and other objects and advantages of the present application will become more fully apparent from the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, the same or similar elements will be denoted by the same or similar reference numerals. The drawings are designed solely for the purposes of illustration and are intended to conceptually illustrate the structural configuration, and are not necessarily drawn to scale.
Fig. 1A shows a schematic diagram of a battery pack 10 according to one embodiment of the present application.
Fig. 1B shows an exploded view of a battery pack 10 according to one embodiment of the present application.
Fig. 1C shows an exploded view of a beam 130 having a second set of cells 120 disposed therein, according to one embodiment of the present application.
Fig. 1D illustrates a cross-sectional view of a beam 130 having a second set of cells 120 disposed therein, according to one embodiment of the present application.
Fig. 1E illustrates an exploded view of a second set of cells 120 according to one embodiment of the present application.
Fig. 2 shows a schematic diagram of a battery pack 20 according to an embodiment of the present application.
Fig. 3A shows a schematic diagram of a battery pack 30 according to one embodiment of the present application.
Fig. 3B shows an exploded view of a battery pack 30 according to one embodiment of the present application.
Fig. 4A shows a schematic diagram of a battery pack 40 according to one embodiment of the present application.
Fig. 4B shows an exploded view of a battery pack 40 according to one embodiment of the present application.
Fig. 5 shows a schematic diagram of a battery pack 50 according to an embodiment of the present application.
Fig. 6 shows a schematic diagram of a battery pack 60 according to an embodiment of the present application.
Fig. 7 shows a schematic diagram of a battery pack 70 according to an embodiment of the present application.
Fig. 8 shows a schematic diagram of a battery pack 80 according to an embodiment of the present application.
Detailed Description
The present invention is described more fully herein with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. The embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It is noted that in the context of the present invention, the term "vehicle", "automobile" or other similar terms includes motor vehicles in general, such as passenger cars (including sport utility vehicles, buses, trucks, etc.), various commercial vehicles, boats, airplanes, etc., and includes hybrid cars, electric cars, plug-in hybrid electric vehicles, etc.
It is also noted that, within the context of the present invention, the terms "first," "second," and the like are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order of the objects in space, time, size, etc. Furthermore, unless specifically stated otherwise, the terms "comprising," "including," "having," and the like are intended to mean a non-exclusive inclusion.
Hereinafter, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings.
Fig. 1A shows a schematic diagram of a battery pack 10 according to an embodiment of the present application, and fig. 1B shows an exploded view of the battery pack 10. Referring to fig. 1A and 1B, the battery pack 10 includes the core modules 110,120, a support 130, and a case 140. The battery cell assembly includes a first group of battery cells 110 and a second group of battery cells 120, and the first group of battery cells further includes 4 battery cell modules 1101, 1102, 1103 and 1104. The cross member as the support portion 130 provides structural support for the battery pack 10.
In the conventional battery pack, the support portion disposed in the battery pack for structural support reduces the space available in the battery pack for disposing the battery cells, thus affecting the overall energy density of the battery pack. To address this problem, in the present embodiment, the second group of battery cells 120 is disposed inside the cross member 130, so that the space in the battery pack 10 is utilized to increase the energy density of the battery pack 10, and the spatial arrangement in the battery pack 10 is optimized, while maintaining sufficient structural strength of the battery pack 10.
In the present embodiment, only one portion of the electric core assembly (i.e., the second group of electric cells 120) is disposed inside the support part 130, however, the present invention is not intended to be so limited, and two portions or more of the electric core assembly may be disposed inside the support part 130. In the battery pack 10, the support part is the cross beam 130 located at the center of the battery pack 10, but the present invention is not intended to limit the support part to such a structure, and may be other suitable support parts such as cross beams, longitudinal beams, side beams, etc. or a combination thereof located at other suitable positions in the battery pack. In the battery pack 10, the electric core assembly 110 and the electric core assembly 120 may be connected in series, but the present invention is not limited thereto, and the two may be connected in parallel or in other series-parallel manner.
In the context of the present invention, when the cross-section of the battery pack is generally rectangular (as shown in fig. 1A-1B, for example), the term "beam" is intended to mean a support beam that extends along the short side of the rectangle.
Fig. 1C shows an exploded view of the beam 130 in which the second group of cells 120 is arranged, and fig. 1D shows a cross-sectional view of the beam 130 in which the second group of cells 120 is arranged. The beam 130 has an opening 150. The second group of cells 120 is fixed inside the cross member 130 through the opening 150 via the structural adhesive 160. The structural adhesive 160 may include any suitable type of structural adhesive, such as a polyurethane structural adhesive, a silicone structural adhesive, an epoxy structural adhesive, and an acrylic structural adhesive. The second group of battery cells 120 disposed in the opening portion 150 and the structural adhesive 160 can enhance the structural strength of the cross member 130, thereby enhancing the structural strength of the battery pack 10.
It should be noted that, in addition to the structural adhesive, the cell may be fixed in the beam 130 by any suitable means such as bolts, snaps, etc. It should also be noted that in the embodiment shown in fig. 1, the second group of battery cells 120 are arranged into the cross beam 130 from above the cross beam 130 through the opening portion 150 from top to bottom, but the present invention is not intended to limit the arrangement manner of the second group of battery cells to such an example. Rather, the second group of cells may be arranged inside the support in any suitable manner.
As an example, fig. 1E shows an exploded view of the second group of cells 120. The second group of battery cells 120 includes a second group of battery cell upper cover 121, a second group of battery cell bus bars 122, a second group of battery cell middle supports 123, a cylindrical battery cell 124, a second group of battery cell structure glue 125, and a second group of battery cell bottom supports 126. The cylindrical battery cells 124 are fixed between the second battery cell middle support 123 and the second battery cell bottom support 126 by using the second battery cell structure glue 125, and the battery cells in the cylindrical battery cells 124 are electrically connected with each other (for example, in series, in parallel, or in series-parallel, etc.) through the second battery cell bus bar 122.
Referring to fig. 1A to 1E, the first group of battery cells 110 and the second group of battery cells 120 have different structures. Specifically, the first group of battery cells 110 has a square-shell type structure, and the second group of battery cells 120 has a cylindrical type structure. Here, the first group of battery cells 110 and the second group of battery cells 120 have different structures for the purpose of improving space utilization. The size of the cylindrical structure in the second group of battery cells 120 may be any suitable size that can be realized in the battery pack 10, for example, the diameter thereof may be within 15mm to 100mm, and the height thereof may be within 65mm to 200 mm. It should be noted that the present invention is not limited to the structure of the battery cells, and the first group of battery cells 110 and the second group of battery cells 120 may adopt any suitable structure such as a cylindrical structure, a blade-type structure, a square-shell-type structure, a soft-package-type structure, or a combination thereof. In addition, the first group of battery cells 110 and the second group of battery cells 120 may have the same structure (as shown in fig. 1A to 1E), or may have different structures, depending on the needs of the actual application and the manufacturing process.
In the battery pack 10, the first group of battery cells 110 may employ lithium iron phosphate cells, and the second group of battery cells 120 may employ ternary lithium cells. The lithium iron phosphate core has relatively low SOC estimation accuracy due to the relatively flat voltage platform, especially in a low-temperature environment. The ternary lithium battery cell and the lithium iron phosphate battery cell are combined and applied to the battery pack 10, so that the SOC estimation precision of the original lithium iron phosphate battery cell can be improved, and the performance of the whole battery pack 10 is improved. It should be noted that the present invention is not intended to limit the types of the first and second groups of cells to such an arrangement, and they may be any suitable cells or combinations thereof, such as lithium iron phosphate cells, ternary lithium cells, nickel hydride cells, and the like. In addition, there is no limitation on the nickel content of the ternary lithium battery cell in the battery pack 10, and it may be, for example, a low nickel battery cell of 30%, or a high nickel battery cell of, for example, 96%.
It should be noted that the "first group of cells" and the "second group of cells" in the context of the present invention may be physically independent from each other (as shown in fig. 1A to 1E), or may be physically integrated together. This can be determined according to actual performance requirements and processes.
Fig. 2 shows a battery pack 20 according to an embodiment of the present application, which includes electric core assemblies 210 and 220, a support part 230, and a case 240. The electric core assembly includes a first group of electric cells 210 and a second group of electric cells 220, and the supporting portion includes a cross beam 230. Here, the second group of cells 220 is located in the cross member 230, thereby increasing the energy density of the battery pack 20 by using the space in the cross member 230. Compared with the first battery cell group in fig. 1A including 4 modules, the first battery cell group 110 in fig. 2 includes a total of 32 modules 2101 to 2132. It can be seen that the present invention is not intended to limit the number of modules in the first set of cells 110. The modules in the first set of battery cells 110 may adopt relatively large modules, relatively small modules, and mixed configuration of the large modules and the small modules.
Similarly to the above, the second group of battery cells 220 may be fixed to the inside of the cross member 230 through the opening portion via structural adhesive. The structural adhesive may include any suitable type of structural adhesive, such as polyurethane structural adhesive, silicone structural adhesive, epoxy structural adhesive, and acrylic structural adhesive. The second set of cells disposed in the opening and the structural adhesive can enhance the structural strength of the beam 230, thereby enhancing the structural strength of the battery pack 20. Also, the second set of cells 220 may be fixed in the cross beam 230 by any suitable means, such as bolts, snaps, etc., in addition to the structural adhesive.
In addition, the first group of battery cells 210 and the second group of battery cells 220 may adopt any suitable structure or combination of a cylindrical structure, a blade-type structure, a square-shell-type structure, a soft-package-type structure, and the like. The first group of battery cells 210 and the second group of battery cells 220 may have the same structure or different structures according to the needs or processes.
Fig. 3A illustrates a battery pack 30 according to an embodiment of the present application, and fig. 3B illustrates an exploded view of the battery pack 30. As shown in fig. 3A and 3B, the battery pack 30 includes the core modules 310, 320, a support 330, and a case 340. Wherein, the battery cell assembly includes first group battery cell 310 and second group battery cell 320, and first group battery cell 310 further includes 4 battery cell modules 3101, 3102, 3103 and 3104, and second group battery cell 320 further includes 2 battery cell modules 3201 and 3202. The support portion 330 includes a beam 3301 and a beam 3302. The cell modules 3201 and 3202 of the second group of cells 320 are respectively located inside the cross beams 3301 and 3302, so that the energy density of the battery pack 30 is improved by using the space in the cross beams 3301 and 3302.
The support part 330 in the battery pack 30 includes a beam 3301 at the upper portion of the battery pack 30 and a beam 3302 at the lower portion of the battery pack 30, compared to the support part 130 in the battery pack 10 including a single beam 130 at the center of the battery pack 10. It will be appreciated that the present invention is not intended to be limited to the number and location of the cross members in the support portion, and that it may be any number of cross members located at any suitable location in the battery pack.
Similarly to the above, the cell modules 3201 and 3202 of the second group of cells 320 may be fixed to the insides of the cross member 3301 and the cross member 3302, respectively, through the opening portions via structural adhesives. The structural adhesive may include any suitable type of structural adhesive, such as polyurethane structural adhesive, silicone structural adhesive, epoxy structural adhesive, and acrylic structural adhesive. The second set of cells disposed in the opening and the structural adhesive can enhance the structural strength of the beam 3301 and the beam 3302, thereby enhancing the structural strength of the battery pack 30. Also, in addition to the structural adhesive, the cell modules 3201 and 3202 of the second group of cells 320 may be fixed in the cross beam 3301 and the cross beam 3302 by using any suitable manner, such as bolts, fasteners, etc.
In addition, the first group of battery cells 310 and the second group of battery cells 320 may adopt any suitable structure or combination of a cylinder type structure, a blade type structure, a square shell type structure, a soft package type structure, and the like. The first group of battery cells 310 and the second group of battery cells 320 may adopt the same structure or different structures according to needs or processes; the cell modules 3101 to 3104 in the first group of cells 310 may adopt the same structure or different structures according to needs or processes; similarly, the cell modules 3201 and 3202 in the second group of cells 320 may also adopt the same structure or different structures.
Fig. 4A illustrates a battery pack 40 according to an embodiment of the present application, and fig. 4B illustrates an exploded view of the battery pack 40. As shown in fig. 4A and 4B, the battery pack 40 includes electric core assemblies 410 and 420, a support part 430, and a case 440. The battery cell assembly includes a first group of battery cells 410 and a second group of battery cells 420, and the first group of battery cells 410 further includes 12 battery cell modules 4101-4112.
Unlike the previous embodiments in which the support portions are all cross beams, the support portions 430 are longitudinal beams. The second group of cells 420 is located inside the stringers 430, and increases the energy density of the battery pack 40 by using the space inside the stringers 430.
In the context of the present invention, when the cross-section of the battery pack is substantially rectangular (as shown, for example, in fig. 4A to 4B), the term "stringer" is intended to mean a support beam extending along the long side of the rectangle. It is easy to think that when the cross section of the battery pack is approximately square, the cross beam and the longitudinal beam have no significant difference and can be replaced with each other.
Similarly to the above, the second group of battery cells 420 may be fixed to the inside of the side member 430 through the opening portion via structural adhesive. The structural adhesive may include any suitable type of structural adhesive, such as polyurethane structural adhesive, silicone structural adhesive, epoxy structural adhesive, and acrylic structural adhesive. The second group of cells arranged in the opening portion and the structural adhesive can enhance the structural strength of the longitudinal beam 430, thereby enhancing the structural strength of the battery pack 40. Also, the second group of cells 420 may be fixed in the longitudinal beams 430 by any suitable means, such as bolts, snaps, etc., in addition to structural adhesive.
In addition, the first group of battery cells 410 and the second group of battery cells 420 may adopt any suitable structure or combination of a cylinder type structure, a blade type structure, a square shell type structure, a soft package type structure, and the like. The first group of cells 410 and the second group of cells 420 may have the same structure or different structures according to the needs or processes.
Fig. 5 illustrates a battery pack 50 according to an embodiment of the present application. The battery pack 50 includes, among other things, the core assemblies 510 and 520, a support 530, and a case 540. Wherein, the electric core subassembly includes first group battery cell 510 and second group battery cell 520, and first group battery cell 510 further includes 4 battery cell modules 5101~5104, and second group battery cell 520 further includes 2 battery cell modules 5201 and 5202. Unlike the previous embodiment in which the support is a cross beam or a longitudinal beam, the support 530 includes two side beams 5301 and 5302. The cell modules 5201 and 5202 of the second group of cells are located inside the edge beams 5301 and 5302, respectively, so that the space in the edge beams 5301 and 5302 is utilized to improve the energy density of the battery pack 50.
In the context of the present invention, the term "edge beam" is intended to mean a support beam that extends along the edge of a battery pack, as shown in fig. 5.
In the embodiment shown in fig. 5, the housing 540 is integral with the edge beams 5301 and 5302, in other words, the housing 540 includes a support 530. In other embodiments, the housing 540 and the supporting part 530 may be physically separated from each other.
Similarly to the above, the cell modules 5201 and 5202 of the second group of cells 520 may be fixed to the insides of the side beams 5301 and 5302, respectively, via structural adhesives through the opening portions. The structural adhesive may include any suitable type of structural adhesive, such as polyurethane structural adhesive, silicone structural adhesive, epoxy structural adhesive, and acrylic structural adhesive. The second set of cells disposed in the openings and the structural adhesive can enhance the structural strength of the edge beams 5301 and 5302, thereby enhancing the structural strength of the battery pack 50. Furthermore, in addition to the structural adhesive, the cell modules 5201 and 5202 of the second group of cells 520 may also be fixed to the edge beams 5301 and 5302 by any suitable means such as bolts and snaps.
In addition, the first group of battery cells 510 and the second group of battery cells 520 may adopt any suitable structure or combination of a cylindrical structure, a blade-type structure, a square-shell-type structure, a soft-package-type structure, and the like. The first group of cells 510 and the second group of cells 520 may have the same structure or different structures according to needs or processes.
Fig. 6 illustrates a battery pack 60 according to one embodiment of the present application. The battery pack 60 includes, among other things, the core assemblies 610 and 620, a support 630, and a case 640. The cell assembly includes a first cell 610 and a second cell 620, the first cell 610 further includes 12 cell modules 6101 to 6112, and the second cell 620 further includes 3 cell modules 6201 to 6203.
Unlike the previous embodiment in which the support portion includes only one of a cross beam, a side beam, or an edge beam, the support portion 630 includes both a cross beam 6301 and a side beam 6302. The battery cell modules 6201 and 6202 of the second group of battery cells 620 are located inside the longitudinal beam 6302, and the battery cell module 6203 of the second group of battery cells 620 is located inside the cross beam 6301, so that the space in the cross beam 6301 and the longitudinal beam 6302 is utilized, and the energy density of the battery pack 60 is improved.
In other embodiments, the support portion may also include any one or combination of cross beams, side beams, edge beams, and other support structures.
Similarly to the above, the cell modules 6201 to 6203 of the second group of cells 620 may be respectively fixed inside the cross beam 6301 and the longitudinal beam 6302 through the opening portions via structural adhesives. The structural adhesive may include any suitable type of structural adhesive, such as polyurethane structural adhesive, silicone structural adhesive, epoxy structural adhesive, and acrylic structural adhesive. The second set of cells disposed in the openings and the structural adhesive can enhance the structural strength of the cross member 6301 and the longitudinal member 6302, thereby enhancing the structural strength of the battery pack 60. Besides, the cell modules 6201 to 6203 of the second group of cells 620 may also be fixed in the cross beam 6301 and the longitudinal beam 6302 by using any suitable manner such as bolts and buckles.
In addition, the first group of battery cells 610 and the second group of battery cells 620 may adopt any suitable structure or combination of a cylinder type structure, a blade type structure, a square shell type structure, a soft package type structure, and the like. The first group of cells 610 and the second group of cells 620 may have the same structure or different structures according to needs or processes.
Fig. 7 illustrates a battery pack 70 according to one embodiment of the present application. The battery pack 70 includes, among other things, the core assemblies 710 and 720, a support 730, and a case 740. The battery cell assembly comprises a first battery cell 710 and a second battery cell 720, the first battery cell 710 further comprises 4 battery cell modules 7101-7104, and the support portion 730 comprises a beam 730. The second set of cells 720 is positioned inside the beam 730, thereby utilizing the space in the beam 730 to increase the energy density of the battery pack 70.
As can be seen from comparing fig. 1 and fig. 7, the second group of battery cells 120 in the battery pack 10 occupies a smaller space inside the cross beam 130 than the second group of battery cells 720 in the battery pack 70 occupies a smaller space inside the cross beam 730. In other words, in the embodiment of the present invention, the size of the space occupied by the electric core assembly within the support may be any appropriate value, and the electric core assembly may be disposed in either a portion of the internal space of the support or the entire internal space of the support, which may depend on the manufacturing process, and may depend on the requirements for the performance of the battery pack. For example, the number of the electric core assemblies arranged inside the support part and the space occupied by the electric core assemblies can be determined according to the gap of the electric quantity of the electric core assemblies outside the support part compared with the total electric quantity requirement.
Similarly to the above, the second group of battery cells 720 may be fixed to the inside of the cross beam 730 through the opening portion via structural adhesive. The structural adhesive may include any suitable type of structural adhesive, such as polyurethane structural adhesive, silicone structural adhesive, epoxy structural adhesive, and acrylic structural adhesive. The second group of cells 720 arranged in the opening portion and the structural adhesive can enhance the structural strength of the beam 730, thereby enhancing the structural strength of the battery pack 70. Also, the second set of cells 720 can be fixed in the beam 730 by any suitable means, such as bolts, snaps, etc., in addition to the structural adhesive.
In addition, the first group of battery cells 710 and the second group of battery cells 720 may adopt any suitable structure or combination of a cylindrical structure, a blade-type structure, a square-shell-type structure, a soft-package-type structure, and the like. The first group of cells 710 and the second group of cells 720 may have the same structure or different structures according to the needs or processes.
Fig. 8 illustrates a battery pack 80 according to one embodiment of the present application. The battery pack 80 includes, among other things, core assemblies 810 and 820, a support 830, and a case 840. Wherein, electric core subassembly includes first group battery cell 810 and second group battery cell 820, and first group battery cell 810 further includes 4 electric core modules 8101~8104, and second group battery cell 820 further includes 2 electric core modules 8201 and 8202.
Similar to the embodiment shown in fig. 5, the support 830 includes two side beams 8301 and 8302. Cell modules 8201 and 8202 of the second group of cells are located inside the edge beams 8301 and 8302 respectively, so that the space in the edge beams 8301 and 8302 is utilized to improve the energy density of the battery pack 80.
Different from the embodiment shown in fig. 5, the proportion of the cell modules 8201 and 8202 of the second group of cells 820 occupying the internal spaces of the edge beams 8301 and 8302 is greater than the proportion of the cell modules 5201 and 5202 of the second group of cells 520 occupying the internal spaces of the edge beams 5301 and 5302. As described above, in the concept of the present invention, the size of the space occupied by the core assembly within the support part may be any appropriate value according to actual needs, and the core assembly may be disposed in a part of the internal space of the support part or may be disposed in the entire internal space of the support part. For example, the number of the electric core assemblies arranged inside the support part and the space occupied by the electric core assemblies can be determined according to the gap of the electric quantity of the electric core assemblies outside the support part compared with the total electric quantity requirement.
In the embodiment shown in fig. 8, the housing 840 and the edge beams 8301 and 8302 may be one piece (i.e., the support portion 830 is part of the housing 840); the housing 840 and the edge beams 8301 and 8302 may also be two components that are physically separated from each other.
Similarly to the above, the cell modules 8201 and 8202 of the second group of cells 820 may be fixed to the inside of the side beams 8301 and 8302, respectively, through the opening portions via the structural adhesive. The structural adhesive may include any suitable type of structural adhesive, such as polyurethane structural adhesive, silicone structural adhesive, epoxy structural adhesive, and acrylic structural adhesive. The second set of cells disposed in the opening and the structural adhesive can enhance the structural strength of the edge beams 8301 and 8302, thereby enhancing the structural strength of the battery pack 80. Furthermore, in addition to the structural adhesive, the cell modules 8201 and 8202 of the second set of cells 820 may also be fixed to the edge beams 8301 and 8302 by using any suitable means such as bolts and fasteners.
In addition, the first group of battery cells 810 and the second group of battery cells 820 may adopt any suitable structure or combination of a cylinder type structure, a blade type structure, a square shell type structure, a soft package type structure, and the like. The first group of cells 810 and the second group of cells 820 may have the same or different structures according to the needs or processes.
In summary, in the battery pack according to an aspect of the present invention, the partial battery cells are disposed inside the supporting portion, so that the space inside the supporting portion is utilized, the space utilization rate inside the entire battery pack is improved, the energy density of the battery pack is improved, and meanwhile, the structural strength of the battery pack is maintained sufficiently. The cells and their associated components (e.g., structural adhesive for securing the cells) located within the support portion can maintain the structural strength of the battery pack. Thus, the battery pack according to an aspect of the present invention can achieve an increase in energy density of the battery pack without weakening the structural strength of the battery pack.
According to the battery pack, the battery cores with different structural types from other positions of the battery pack can be arranged in the supporting part, so that the space utilization rate in the supporting part is further improved, and the energy density of the battery pack is improved. In addition, in the battery pack according to an aspect of the present invention, the cells of different chemical systems may be disposed inside the supporting portion and at other positions of the battery pack, and the combination of the cells of different chemical systems is used to improve the overall performance of the entire battery pack.
Although only a few embodiments of the present application have been described in detail above, those skilled in the art will appreciate that the present application may be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made therein without departing from the spirit and scope of the present application as defined in the appended claims.

Claims (10)

1. A battery pack comprising a support (130), the support (130) providing structural support for the battery pack, characterized in that the battery pack further comprises a cell assembly (110, 120), wherein,
part of the electric core assembly (110, 120) is located inside the support (130).
2. The battery pack of claim 1, wherein the core assembly comprises a first set of cells (110) and a second set of cells (120),
the first group of cells (110) adopts a first structure; and
the second group of battery cells (120) adopts a second structure and is positioned inside the supporting part (130),
wherein the first structure is different from the second structure.
3. The battery pack of claim 2, wherein the first structure or the second structure comprises one or more of:
cylindrical structure, blade type structure, square shell type structure and soft package type structure.
4. A battery pack, as recited in claim 1, wherein the support (130) comprises one or more of:
the cross beam, the longitudinal beam and the edge beam of the battery pack.
5. The battery pack according to claim 2,
the second group of battery cells (120) are fixed inside the supporting part (130) through the opening part (150) of the supporting part (130).
6. The battery pack according to claim 5,
the second group of battery cells (120) is fixed inside the supporting part (130) through structural adhesive (160).
7. The battery pack of claim 2, wherein the first group of cells (110) or the second group of cells (120) employs one or more of:
lithium iron phosphate cell, ternary lithium cell and nickel-hydrogen cell.
8. The battery pack according to claim 1,
the electric core assembly (110, 120) is disposed in all or a part of the inside of the support portion (130).
9. The battery pack of claim 1, further comprising a housing (140),
wherein the housing (140) comprises the support (130).
10. A vehicle characterized by having the battery pack according to any one of claims 1 to 9.
CN202111011592.3A 2021-08-31 2021-08-31 Battery package and have its vehicle Pending CN113851775A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202111011592.3A CN113851775A (en) 2021-08-31 2021-08-31 Battery package and have its vehicle
PCT/CN2021/126091 WO2023029174A1 (en) 2021-08-31 2021-10-25 Battery pack and vehicle having same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111011592.3A CN113851775A (en) 2021-08-31 2021-08-31 Battery package and have its vehicle

Publications (1)

Publication Number Publication Date
CN113851775A true CN113851775A (en) 2021-12-28

Family

ID=78976614

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111011592.3A Pending CN113851775A (en) 2021-08-31 2021-08-31 Battery package and have its vehicle

Country Status (2)

Country Link
CN (1) CN113851775A (en)
WO (1) WO2023029174A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111009629B (en) * 2019-11-18 2022-02-08 比亚迪股份有限公司 Battery pack and electric vehicle
CN110993845B (en) * 2019-11-18 2021-12-07 比亚迪股份有限公司 Battery pack and electric vehicle
CN212277324U (en) * 2020-06-23 2021-01-01 比亚迪股份有限公司 Vehicle and battery pack thereof
CN212625868U (en) * 2020-09-14 2021-02-26 北京车和家信息技术有限公司 Battery package and vehicle

Also Published As

Publication number Publication date
WO2023029174A1 (en) 2023-03-09

Similar Documents

Publication Publication Date Title
CN209389112U (en) Power battery pack and electric vehicle
Taniguchi et al. Development of nickel/metal-hydride batteries for EVs and HEVs
JP6113799B2 (en) Fuel cell stack assembly for fuel cell stacking and crash protection-reference structure design
EP3017986B1 (en) Vehicle battery systems and method
US11196120B2 (en) Battery module, and battery pack and vehicle comprising same
US11661114B2 (en) Vehicle floor structure
CN211320182U (en) Battery box and device
CN106025321A (en) Datum design for fuel cell stack and collision protection
KR20120116829A (en) A battery which is improved damageability and repairability about low-speed impact for the electric vehicle
CN113851775A (en) Battery package and have its vehicle
CN217485627U (en) Battery and power consumption device
CN115122894A (en) Power battery assembly inversely integrated with sliding plate chassis, electric vehicle and design method
KR20240008075A (en) Battery pack and assembling method thereof
EP4131567A1 (en) Power supply device, and vehicle and electrical storage device each equipped with same
CN212783703U (en) Battery cell, battery and power consumption device
CN211295177U (en) Battery cell module structure and battery pack using same
KR20140003909A (en) A battery which is improved damageability and repairability about low-speed impact for the electric vehicle
CN221150183U (en) Battery pack and battery assembly
US20240006696A1 (en) Battery array and battery assembly
US20240063479A1 (en) Battery cell assembly
CN216928764U (en) Battery pack and battery pack
CN214625246U (en) Battery pack and electric vehicle
CN219811584U (en) Battery pack
JP7428817B2 (en) Batteries, power consumption devices, and battery manufacturing methods
CN220710456U (en) Battery pack and vehicle

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination