WO2024255923A1 - 电池模组及汽车 - Google Patents

电池模组及汽车 Download PDF

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Publication number
WO2024255923A1
WO2024255923A1 PCT/CN2024/109362 CN2024109362W WO2024255923A1 WO 2024255923 A1 WO2024255923 A1 WO 2024255923A1 CN 2024109362 W CN2024109362 W CN 2024109362W WO 2024255923 A1 WO2024255923 A1 WO 2024255923A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure relief
support member
battery cell
battery module
groove
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
PCT/CN2024/109362
Other languages
English (en)
French (fr)
Inventor
黄伟才
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.)
Eve Energy Co Ltd
Original Assignee
Eve Energy 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 Eve Energy Co Ltd filed Critical Eve Energy Co Ltd
Priority to US18/938,697 priority Critical patent/US20250062486A1/en
Priority to DE202024002486.5U priority patent/DE202024002486U1/de
Priority to EP24211931.1A priority patent/EP4675786A1/en
Priority to JP2024206503A priority patent/JP2026008627A/ja
Publication of WO2024255923A1 publication Critical patent/WO2024255923A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • H01M50/20—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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/383—Flame arresting or ignition-preventing means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • 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

Definitions

  • the present application relates to the field of battery technology, for example, to battery modules and automobiles.
  • lithium-ion powered vehicles are one of the representatives of new energy vehicles.
  • the key technology of lithium-ion powered vehicles is lithium-ion batteries, and its design needs to consider many factors, on the one hand to ensure that the battery performance meets the needs of the car, on the other hand to ensure that the battery has sufficient safety and reliability.
  • the battery module is usually directly integrated into the car frame, and the battery module cover is used as the floor of the car passenger compartment.
  • the cover since passengers will step on the car, using the cover as the floor of the car passenger compartment will usually cause the cover to be easily stepped on and deformed due to insufficient support strength, making it difficult to ensure product quality.
  • the present application provides a battery module and a car, which have a simple structure and a strong box cover support.
  • a battery module comprising a case body, a battery cell, a case cover and a support member, wherein a receiving groove is recessed in the case body; a plurality of battery cells are arranged side by side along a first direction to form a battery cell group, and the battery cell group is arranged in the receiving groove; the case cover is arranged to block a notch of the receiving groove; the support member is arranged between the case cover and the battery cell group, and a pressure relief groove is arranged on the support member, and the length of the pressure relief groove extends along the first direction; the support member comprises a substrate and a first reinforcement portion, and the first reinforcement portion is arranged on a side of the substrate facing the case cover, the first reinforcement portion is pressed against a side surface of the case cover close to the battery cell group, and the length of the first reinforcement portion extends along the first direction, at least part of the pressure relief groove is arranged in the first reinforcement portion, and the pressure relief valves of all the battery cells are connected to the pressure
  • a car comprising a frame and the battery module of the first aspect, wherein the battery module is detachably connected to the bottom of the frame, and a cover of the battery module serves as a floor of the car.
  • the beneficial effects of the present application are as follows: by providing the support member, the first reinforcement part can effectively strengthen the support for the box cover, thereby improving the support strength of the box cover, reducing the deformation amplitude caused by the driver's stepping on it, and ensuring the product quality of the battery module; by providing a pressure relief groove on the support member, and the pressure relief groove is always partially provided in the first reinforcement part, on the one hand, the weight of the support member can be reduced, and the use of materials can be reduced to achieve cost reduction.
  • the pressure relief groove is connected to the pressure relief valve of the battery cell, so that high-temperature gas and flame can be discharged from the pressure relief channel when the battery cell thermally runs away, reducing the occurrence of thermal runaway of the battery module caused by blockage of the pressure relief valve, thereby improving the safety of the battery module.
  • FIG1 is a schematic structural diagram of a battery module according to an embodiment of the present application.
  • FIG2 is a cross-sectional view of a battery module according to an embodiment of the present application.
  • FIG3 is an exploded view of a battery module according to an embodiment of the present application.
  • FIG4 is a schematic structural diagram of a support member according to an embodiment of the present application.
  • FIG5 is a schematic structural diagram of a support member according to another embodiment of the present application.
  • FIG6 is an exploded view of a support member according to another embodiment of the present application.
  • FIG7 is an enlarged schematic diagram of point A in FIG6;
  • FIG. 8 is an enlarged schematic diagram of point B in FIG. 6 .
  • connection should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them.
  • a first feature being “above”, “above” and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or indicates that the first feature is higher in level than the second feature.
  • a first feature being “below”, “below” and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or indicates that the first feature is lower in level than the second feature.
  • the terms “upper”, “lower”, “right”, etc. are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.
  • the terms “first” and “second” are used to distinguish in the description and have no special meaning.
  • the battery module of the embodiment of the present application comprises a box body 1, a battery cell 2, a box cover 3 and a support member 4, wherein the box body 1 is recessed with a receiving groove 11; a plurality of battery cells 2 are arranged side by side along a first direction to form a battery cell group 20 (the first direction is the X direction shown in the figure), and the battery cell group 20 is arranged in the receiving groove 11; the box cover 3 is arranged to block the notch of the receiving groove 11; the support member 4 is arranged between the box cover 3 and the battery cell group 20, and a pressure relief groove 41 is arranged on the support member 4, the length of the pressure relief groove 41 extends along the first direction and passes through both sides of the support member 4 along the first direction, the support member 4 comprises a substrate 42 and a first reinforcement portion 43, the substrate 42 is provided with a first reinforcement portion 43 on the side facing the box cover 3, the first reinforcement portion 43 is pressed against a side of the box cover 3 close to the
  • the first reinforcement part 43 can effectively strengthen the support for the box cover 3, thereby improving the support strength of the box cover 3, reducing the deformation caused by the driver's stepping on it, and ensuring the product quality of the battery module; by setting the pressure relief groove 41 on the support member 4, and the pressure relief groove 41 is always partially set in the first reinforcement part 43, on the one hand, the weight of the support member 4 can be reduced, and the use of materials can be reduced to achieve cost reduction.
  • the pressure relief groove 41 is connected to the pressure relief valve of the battery cell 2, so that when the battery cell 2 is thermally runaway, the high-temperature gas and flame can be discharged from the pressure relief channel in time, reducing the occurrence of thermal runaway of the battery module caused by blockage of the pressure relief valve, thereby improving the safety of the battery module.
  • the length of the pressure relief groove 41 extends along the first direction and penetrates at least one side of the support member 4 arranged along the first direction. That is, the pressure relief groove 41 extends along the first direction and penetrates both sides of the support member 4 arranged along the first direction. Both ends of the pressure relief groove 41 along the first direction can be connected to the outside, so that the thermal runaway gas can be discharged in time to avoid accumulation inside the battery module to cause explosion, and the thermal runaway gas discharge effect is good.
  • the length of the pressure relief groove 41 can also be extended along the first direction and only penetrate one side of the support member 4 arranged along the first direction, that is, one end of the pressure relief groove 41 along the first direction can be connected to the outside for thermal runaway gas discharge.
  • the length of the pressure relief groove 41 extends along the first direction and does not penetrate the support member 4.
  • a connecting port connecting the outside and the pressure relief groove 41 is opened on the support member 4 for thermal runaway gas discharge. This structural design can effectively ensure the structural strength of the support member 4.
  • the support member 4 further includes a second reinforcing portion 44, and at least one second reinforcing portion 44 is respectively provided at both ends of the substrate 42 adjacent to the battery group 20 along the second direction (the second direction is the Y direction in the figure), and the length of the second reinforcing portion 44 extends along the first direction, and the second reinforcing portion 44 is pressed against a side of the box cover 3 close to the battery group 20, wherein the first direction and the second direction are arranged at an angle.
  • the second reinforcing portion 44 Through the arrangement of the second reinforcing portion 44, the support for the box cover 3 can be strengthened, so that the box cover 3 has multi-point support to ensure the balance of the overall support of the box cover 3.
  • a second reinforcing portion 44 is respectively provided on both sides of the first reinforcing portion 43 along the second direction to achieve three-point support for the box cover 3.
  • multiple second reinforcing portions 44 can be correspondingly arranged to ensure the support of the box cover 3.
  • the base plate 42 , the first reinforcement portion 43 , and the second reinforcement portion 44 are integrally formed, such as by integral injection molding.
  • the integrally formed structure has high strength and is easy to produce.
  • the pressure relief groove 41 is arranged on the side of the substrate 42 facing the battery cell group 20, and the depth of the pressure relief groove 41 extends into the first reinforcement portion 43 along the third direction (the third direction is the Z direction shown in the figure), wherein the first direction, the second direction and the third direction are arranged at angles to each other.
  • the first direction, the second direction and the third direction are arranged perpendicular to each other.
  • the base plate 42, the first reinforcement part 43 and the second reinforcement part 44 are detachably connected.
  • the split arrangement has low difficulty in part production, convenient production and low cost for later maintenance and replacement.
  • first reinforcement part 43 and the second reinforcement part 44 are respectively glued to the base plate 42, and the glue connection is stable and convenient for disassembly and assembly.
  • first reinforcement part 43 and the second reinforcement part 44 can also be a bracket extruded by a combination of glass fiber and epoxy resin, which has good flame retardancy and higher strength.
  • the first reinforcement part 43 When the substrate 42 and the first reinforcement part 43 are detachably connected, the first reinforcement part 43 includes a main body 431 and a connecting part 432.
  • the main body 431 extends in length along the first direction.
  • the main body 431 is recessed on one side of the battery cell group 20 and is provided with a pressure relief groove 41.
  • the main body 431 is protruding on both sides of the second direction and is provided with connecting parts 432.
  • the connecting parts 432 are adjacent to the side of the main body 431 where the pressure relief groove 41 is provided.
  • the connecting parts 432 are detachably connected to the substrate 42.
  • a plurality of connecting ports 46 are provided through the substrate 42.
  • the pressure relief valve is connected to the pressure relief groove 41 through the connecting ports 46.
  • the first reinforcement part 43 has a simple structure and is convenient to connect. When the battery cell 2 is in thermal runaway, the high-pressure thermal runaway gas can break through the pressure relief valve and pass through the connecting ports 46 to enter the pressure relief groove 41 for pressure relief.
  • the first reinforcement portion 43 is connected to the substrate 42 by gluing, and a third glue groove is provided on the bottom side of the connection portion 432 of the first reinforcement portion 43, and the third glue groove is configured to accommodate the structural glue 5.
  • the third glue groove can be provided to limit the structural glue 5 and reduce the deviation of the structural glue 5.
  • the second reinforcement part 44 can be set to be hollow, that is, a through groove is set in the second reinforcement part 44, and the through groove extends along the first direction and passes through the two sides of the second reinforcement part 44 along the first direction, that is, the second reinforcement part 44 is a tubular structure with a U-shaped cross-section. This structural setting facilitates the molding of the second reinforcement part 44 and consumes less material.
  • a limiting groove 47 is recessed on the substrate 42, and the length of the limiting groove 47 extends along the first direction.
  • the connecting portion 432 and one end of the main body 431 adjacent to the battery cell group 20 are both bonded to the bottom of the limiting groove 47.
  • the bottom of the limiting groove 47 is penetrated by a plurality of connecting ports 46, and the projection of the connecting ports 46 along the third direction is located in the pressure relief groove 41.
  • a corresponding connecting port 46 is provided for the pressure relief valve of each battery cell 2, wherein the first direction, the second direction and the third direction are arranged at an angle to each other.
  • the limitation of the installation position of the first reinforcing portion 43 can be strengthened, and the installation position accuracy of the first reinforcing portion 43 can be improved, that is, the relative position accuracy of the pressure relief groove 41 and the pressure relief valve of the battery cell 2 can be ensured, and at the same time, the height of the support member 4 along the third direction can be reduced, thereby reducing the overall occupied space of the overall battery module.
  • the number of connecting ports 46 corresponds to the number of battery cells 2 one by one, which can ensure the structural strength of the connection of the substrate 42 on both sides of the connecting ports 46 along the second direction, and can ensure that the pressure relief port of each battery cell 2 is independently connected to the pressure relief channel, avoiding the impact of adjacent battery cells 2 when one battery cell 2 has thermal runaway.
  • the first reinforcement part 43 and the second reinforcement part 44 are recessed toward one side of the box cover 3 to form a first glue groove 45, the length of which extends along the first direction, and the first glue groove 45 is configured to accommodate the structural glue 5.
  • the structural glue 5 By providing the structural glue 5, the connection strength between the first reinforcement part 43, the second reinforcement part 44 and the box cover 3 can be strengthened, and the gap between the structures can be avoided to cause the subsequent impact, extrusion, etc. on the box cover 3 under a vibration environment, thereby improving the structural stability between the reinforcement part and the box cover 3.
  • the structural glue groove 45 the structural glue 5 can be limited, the position stability of the structural glue 5 can be improved, and the overflow or offset of the structural glue can be avoided.
  • the first glue groove 45 can be provided only on the first reinforcement part 43 or only on the second reinforcement part 44.
  • a plurality of second adhesive grooves are provided on the side of the substrate 42 facing the battery cell group 20, the length of the second adhesive grooves extends along the first direction, and the second adhesive grooves are configured to accommodate the structural adhesive 5.
  • the structural adhesive 5 is used to enhance the connection strength between the substrate 42 and the battery cell group 20, and reduce the shaking gap between the support member 4 and the battery cell group 20.
  • the structural adhesive 5 can be used to connect the multiple battery cells 2 in the battery cell group 20 as a whole, reduce the shaking between the multiple battery cells 2, and improve the overall structural stability of the battery module.
  • a second glue groove can also be set on the side of the second reinforcement part 44 facing the battery cell group 20, so that the second reinforcement part 44 is respectively connected to the battery cell group 20, the base plate 42 and the box cover 3 through the structural glue 5, thereby improving the connection strength and position stability of the second reinforcement part 44.
  • the battery module further includes a conductive sheet 6, the support member 4 is an insulating support member, a mounting opening 48 is provided on the support member 4 at a position relative to the pole of the battery cell 2, the conductive sheet 6 is provided on the support member 4, and part of the guide sheet passes through the mounting opening 48 to connect the pole of the battery cell 2.
  • the support member 4 is an insulating support member, the conductive sheet 6 set to be connected in series or in parallel between multiple battery cells 2 can be installed on the support member 4, that is, the support member 4 is used as an isolation plate of the battery module cell connection system (Cell Connection System, CCS), and is set to install the conductive sheet 6 and the sampling harness, thereby improving the functionality of the support member 4.
  • CCS Battery Connection System
  • mounting beams 7 are provided on both sides of the battery cell group 20 along the first direction, and the length of the mounting beams 7 extends along the second direction, and the support member 4 is connected to the mounting beams 7, wherein the first direction and the second direction are arranged at an angle.
  • the arrangement of the mounting beams 7 is used to strengthen the support strength of the support member 4, thereby ensuring the support strength of the support member 4 on the box cover 3.
  • the size of the mounting beams 7 along the third direction is consistent with the size of the battery cell 2 along the third direction, that is, the support member 4 is simultaneously abutted against the battery cell group 20 and the mounting beams 7, which can ensure the overall structural support of the support member 4.
  • the battery module When the battery module is provided with a mounting beam 7, the battery module further comprises foam, which is provided on the mounting beam 7, and the side of the foam away from the mounting beam 7 abuts against the box cover 3.
  • foam By providing the foam, the mounting beam 7 can be used to strengthen the support of the box cover 3, thereby improving the support strength of the box cover 3.
  • the battery module also includes mica paper, which is pasted in the pressure relief groove 41.
  • Mica paper has electrical insulation, high temperature resistance and corrosion resistance, which effectively prevents the flame sprayed by the pressure relief valve from spreading when the battery cell 2 is thermally runaway, thereby improving the overall safety of the battery module.
  • the embodiment of the present application also provides a car, including a frame 8 and a battery module of any embodiment of the present application, the battery module is detachably connected to the bottom of the frame 8, and the box cover 3 of the battery module is the bottom plate of the car.
  • the first reinforcing part 43 can effectively strengthen the support of the box cover 3, thereby improving the support strength of the box cover 3, that is, improving the strength of the bottom plate of the car, preventing the driver from stepping on it and causing deformation, and ensuring the product quality of the car.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

一种电池模组及汽车，其中电池模组包括包括箱体（1）、电芯（2）、箱盖（3）和支撑件（4），箱体（1）凹陷设置有容纳槽（11）；多个电芯（2）沿第一方向并排设置形成电芯组（20），电芯组（20）设置于容纳槽（11）内；箱盖（3）设置为封堵容纳槽（11）的槽口；支撑件（4）设置于箱盖（3）与电芯组（20）之间，支撑件（4）上设置有泄压槽（41），支撑件（4）包括基板（42）和第一加强部（43），基板（42）朝向箱盖（3）一侧设置有第一加强部（43），第一加强部（43）抵紧箱盖（3），至少部分泄压槽（41）设置于第一加强部（43）内，且所有的电芯（2）的泄压阀均与泄压槽（41）相通。

Description

电池模组及汽车
本申请要求在2024年07月03日提交中国专利局、申请号为202421563942.6的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，例如涉及电池模组及汽车。
背景技术
车辆处在能源转换时期，新能源车辆正在日益增加，锂离子动力汽车是新能源汽车的代表之一。而锂离子动力汽车的关键技术是锂离子电池，其设计需要考虑许多因素，一方面保证电池性能满足汽车的需求，另一方面，保证电池具有足够的安全性、可靠性。
技术问题
出于减重、降本等因素考虑，通常直接将电池模组集成在汽车的车架上，把电池模组的箱盖作为汽车乘员舱地板。然而，由于乘员会在车上踩踏，将箱盖作为汽车乘员舱地板，通常会由于箱盖支撑强度不足而导致箱盖容易被踩踏变形，产品质量难以保证。
技术解决方案
本申请提供电池模组及汽车，其结构简单，且其箱盖支撑性强。
第一方面，提供一种电池模组，包括箱体、电芯、箱盖和支撑件，箱体凹陷设置有容纳槽；多个电芯沿第一方向并排设置形成电芯组，电芯组设置于容纳槽内；述箱盖设置为封堵容纳槽的槽口；支撑件设置于箱盖与电芯组之间，支撑件上设置有泄压槽，泄压槽的长度沿第一方向延伸，支撑件包括基板和第一加强部，基板朝向箱盖一侧设置有第一加强部，第一加强部抵紧箱盖靠近电芯组的一侧面，第一加强部的长度沿第一方向延伸，至少部分泄压槽设置于第一加强部内，且所有的电芯的泄压阀均与泄压槽相通。
第二方面，提供一种汽车，包括车架和第一方面的电池模组，电池模组可拆卸连接于车架的底部，电池模组的箱盖为汽车的底板。
有益效果
本申请的有益效果：通过支撑件的设置，使第一加强部能够有效加强对箱盖支撑，从而提升箱盖的支撑强度，减小因驾驶人员踩踏而产生的形变幅度，保证电池模组的产品质量；通过在支撑件上设置泄压槽，且泄压槽始终部分设置在第一加强部内，一方面能够实现支撑件的减重，以及减少材料的使用实现降本，另一方面，泄压槽与电芯的泄压阀相通，使电芯热失控时高温气体及火焰能够从泄压通道排出，减少泄压阀堵塞而导致电池模组热失控蔓延的情况发生，提升电池模组的使用安全性。
附图说明
图1是本申请实施例的电池模组的结构示意图；
图2是本申请实施例的电池模组的剖视图；
图3是本申请实施例的电池模组的爆炸图；
图4是本申请一实施例的支撑件的结构示意图；
图5是本申请另一实施例的支撑件的结构示意图；
图6是本申请另一实施例的支撑件的爆炸图；
图7是图6中的A处放大示意图；
图8是图6中的B处放大示意图。
图中：
1、箱体；11、容纳槽；2、电芯；20、电芯组；3、箱盖；4、支撑件；41、泄压槽；42、基板；43、第一加强部；431、主体部；432、连接部；44、第二加强部；45、第一胶槽；46、连通口；47、限位槽；48、安装口；5、结构胶；6、导电片；7、安装梁；8、车架。
本发明的实施方式
下面结合附图和实施例对本申请作进一步的详细说明。可以理解的是，此处所描述的具体实施例用于解释本申请，而非对本申请的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与本申请相关的部分而非全部结构。
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据情况理解上述术语在本申请中的含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或表示第一特征水平高度小于第二特征。
在本实施例的描述中，术语“上”、“下”、“右”、等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”用于在描述上加以区分，并没有特殊的含义。
如图1、图2和图3所示，本申请实施例的电池模组，包括箱体1、电芯2、箱盖3和支撑件4，箱体1凹陷设置有容纳槽11；多个电芯2沿第一方向并排设置形成电芯组20（第一方向为图示X方向），电芯组20设置于容纳槽11内；箱盖3设置为封堵容纳槽11的槽口；支撑件4设置于箱盖3与电芯组20之间，支撑件4上设置有泄压槽41，泄压槽41的长度沿第一方向延伸并贯穿支撑件4沿第一方向的两侧，支撑件4包括基板42和第一加强部43，基板42朝向箱盖3一侧设置有第一加强部43，第一加强部43抵紧箱盖3靠近电芯组20的一侧面，第一加强部43的长度沿第一方向延伸，至少部分泄压槽41设置于第一加强部43内，且所有的电芯2的泄压阀均与泄压槽41相通。
通过支撑件4的设置，使第一加强部43能够有效加强对箱盖3支撑，从而提升箱盖3的支撑强度，减小因驾驶人员踩踏而产生的形变幅度，保证电池模组的产品质量；通过在支撑件4上设置泄压槽41，且泄压槽41始终部分设置在第一加强部43内，一方面能够实现支撑件4的减重，以及减少材料的使用实现降本，另一方面，泄压槽41与电芯2的泄压阀相通，使电芯2热失控时高温气体及火焰能够从泄压通道及时排出，减少泄压阀堵塞而导致电池模组热失控蔓延的情况发生，提升电池模组的使用安全性。
泄压槽41的长度沿第一方向延伸并贯穿支撑件4沿第一方向排列的至少一侧面。即泄压槽41沿第一方向延伸贯穿支撑件4沿第一方向排列的两侧，泄压槽41沿第一方向的两端均能与外部连通，使热失控气体能够及时排出，避免堆积至电池模组内部造成爆炸，热失控气体排放效果好。还可以将泄压槽41的长度沿第一方向延伸并只贯穿支撑件4沿第一方向排列的一侧面设置，即泄压槽41沿第一方向的一端能和外部连通进行热失控气体排放。此外，泄压槽41的长度沿第一方向延伸不贯穿支撑件4，支撑件4上开设有连通外部和泄压槽41的连通口进行热失控气体排放，该结构设计能够有效保证支撑件4的结构强度。
在本实施例中，如图3、图4和图5所示，支撑件4还包括第二加强部44，基板42邻近于电芯组20沿第二方向的两端位置分别设置有至少一个第二加强部44（第二方向为图示Y方向），且第二加强部44的长度沿第一方向延伸，第二加强部44抵紧箱盖3靠近电芯组20的一侧面，其中，第一方向与第二方向呈夹角设置。通过第二加强部44的设置，能够加强对箱盖3的支撑，使箱盖3具有多点支撑，以保证箱盖3整体支撑的平衡性。在本实施例中，在第一加强部43沿第二方向的两侧分别设置有一个第二加强部44，以实现对箱盖3的三点支撑，在其他实施例中，不影响电芯组20顶部结构使用时，可相应再设置多个第二加强部44以保证箱盖3的支撑性。
在一些实施例中，如图4所示，基板42、第一加强部43和第二加强部44一体成型，例如一体注塑成型，一体成型结构强度高，生产便利。
基板42和第一加强部43一体成型时，泄压槽41设置于基板42朝向电芯组20一侧，且泄压槽41的深度沿第三方向延伸至第一加强部43内（第三方向为图示Z方向），其中，第一方向、第二方向和第三方向相互呈夹角设置，本实施例中第一方向、第二方向和第三方向相互垂直设置，该结构成型便利，整体性强，有效提升支撑件4生产效率。
在另一些实施例中，如图5、图6、图7和图8所示，基板42、第一加强部43和第二加强部44可拆卸连接。分体式设置，零件生成难度较低，生产便利，后期维护更换成本较低。
示例地，第一加强部43和第二加强部44分别与基板42胶粘，胶粘连接稳固，且拆装便利。此外，第一加强部43和第二加强部44还可以采用玻璃纤维和环氧树脂的组合材质挤塑成型的支架，阻燃性好，强度更高。
当基板42和第一加强部43可拆卸连接时，第一加强部43包括主体部431和连接部432，主体部431长度沿第一方向延伸，主体部431朝向电芯组20一侧凹陷设置有泄压槽41，主体部431沿第二方向的两侧分别凸出设置有连接部432，连接部432邻近于主体部431开设有泄压槽41的一侧，连接部432与基板42可拆卸连接，基板42上贯穿设置有多个连通口46，泄压阀通过连通口46与泄压槽41连通。第一加强部43结构简单，连接便利，电芯2热失控时高压热失控气体能够冲破泄压阀，穿过连通口46进入泄压槽41内进行泄压。本实施例中，第一加强部43与基板42胶粘进行连接，第一加强部43的连接部432底侧设置有第三胶槽，第三胶槽设置为容纳结构胶5，通过第三胶槽的设置能够对结构胶5进行限定，减少结构胶5的偏移。
为减少第二加强部44独立设置时的重量，可以将第二加强部44进行中空设置，即第二加强部44内设置通槽，通槽沿第一方向延伸并贯穿第二加强部44沿第一方向的两侧，即第二加强部44为截面呈回字型的管状结构，该结构设置便于第二加强部44成型，且材料耗费较少。
基板42上凹陷设置有限位槽47，且限位槽47的长度沿第一方向延伸，连接部432及主体部431邻近电芯组20的一端均粘接于限位槽47的槽底，限位槽47的槽底贯穿设置有多个连通口46，且连通口46沿第三方向的投影位于泄压槽41内，每个电芯2的泄压阀对应设置有一个连通口46，其中，第一方向、第二方向和第三方向相互呈夹角设置。通过限位槽47的设置，能够加强第一加强部43安装位置的限定，提升第一加强部43的安装位置精度，即保证泄压槽41与电芯2的泄压阀的相对位置精度，同时还能够降低支撑件4沿第三方向的高度，从而降低整体电池模组的整体占用空间。连通口46数量与电芯2数量一一对应，能够保证基板42位于连通口46沿第二方向两侧的连接的结构强度，且能保证每一个电芯2的泄压口均独自与泄压通道连通，避免一个电芯2热失控时影响相邻的电芯2。
第一加强部43和第二加强部44朝向箱盖3一侧凹陷设置有第一胶槽45，第一胶槽45的长度沿第一方向延伸，第一胶槽45设置为容纳结构胶5。通过结构胶5的设置，能够加强第一加强部43、第二加强部44与箱盖3的连接强度，避免结构间存在缝隙而造成后续在震动环境下对箱盖3形成冲击、挤压等情况发生，提升加强部与箱盖3之间的结构稳定性。且通过第一胶槽45的设置，能够对结构胶5进行限定，提升结构胶5的位置稳定性，避免出现溢胶或偏移等情况。在一些实施例中，可以只在第一加强部43或只在第二加强部44上设置第一胶槽45。
此外，基板42朝向电芯组20一侧设置有多个第二胶槽，第二胶槽的长度沿第一方向延伸，第二胶槽设置为容纳结构胶5。通过结构胶5增强基板42与电芯组20之间的连接强度，减少支撑件4与电芯组20之间的晃动缝隙，同时可以利用结构胶5将电芯组20中的多个电芯2连接为一体，减少多个电芯2间的晃动，提升电池模组的整体结构稳定性。
第二加强部44与基板42可拆卸设置时，除了基板42朝向电芯组20一侧设置第二胶槽外，还可以在第二加强部44朝向电芯组20一侧设置第二胶槽，以使第二加强部44通过结构胶5分别与电芯组20、基板42以及箱盖3连接成一体，提升第二加强部44的连接强度及位置稳定性。
在本实施例中，电池模组还包括导电片6，支撑件4为绝缘支撑件，支撑件4上相对电芯2的极柱位置贯穿设置有安装口48，导电片6设置在支撑件4上，且部分导向片穿过安装口48以连接电芯2的极柱。通过将支撑件4设置为绝缘支撑件，使设置为多个电芯2间串联或并联的导电片6能够安装至支撑件4上，即利用支撑件4兼做电池模组电池连接系统(Cell Connection System，CCS)的隔离板使用，设置为安装导电片6以及采样线束，提升支撑件4的使用功能性。
如图1和图2所示，电芯组20沿第一方向的两侧均设置有安装梁7，且安装梁7的长度沿第二方向延伸，支撑件4连接于安装梁7上，其中，第一方向与第二方向呈夹角设置。通过安装梁7的设置，以便于加强支撑件4的支撑强度，从而保证支撑件4对箱盖3的支撑强度。在本实施例中，安装梁7沿第三方向的尺寸与电芯2沿第三方向尺寸一致，即支撑件4同时抵接至电芯组20和安装梁7上，能够保证支撑件4的整体结构支撑性。
当电池模组设置有安装梁7时，电池模组还包括泡棉，泡棉设置于安装梁7上，泡棉远离安装梁7一侧与箱盖3抵接。通过泡棉的设置，能够利用安装梁7加强对箱盖3的支撑，提升箱盖3的支撑强度。
电池模组还包括云母纸，泄压槽41内粘贴有云母纸。云母纸具有电气绝缘、耐高温及耐腐蚀性能，有效防止电芯2热失控时由泄压阀喷出的火焰蔓延，提升电池模组整体的使用安全性。
如图1至图8所示，本申请的实施例还提供一种汽车，包括车架8和本申请任意实施例的电池模组，电池模组可拆卸连接于车架8的底部，电池模组的箱盖3为汽车的底板。通过电池模组的支撑件4设置，使第一加强部43能够有效加强对箱盖3支撑，从而提升箱盖3的支撑强度，即提升汽车的底板的强度，防止驾驶人员踩踏而发生形变的情况发生，保证汽车的产品质量。

Claims (12)

  1. 一种电池模组，包括：
    箱体（1），所述箱体（1）凹陷设置有容纳槽（11）；
    电芯（2），多个电芯（2）沿第一方向并排设置形成电芯组（20），所述电芯组（20）设置于所述容纳槽（11）内；
    箱盖（3），所述箱盖（3）设置为封堵所述容纳槽（11）的槽口；
    支撑件（4），所述支撑件（4）设置于所述箱盖（3）与所述电芯组（20）之间，所述支撑件（4）上设置有泄压槽（41），所述泄压槽（41）的长度沿所述第一方向延伸，所述支撑件（4）包括基板（42）和第一加强部（43），所述基板（42）朝向所述箱盖（3）一侧凸出设置有所述第一加强部（43），所述第一加强部（43）抵紧所述箱盖（3）靠近所述电芯组（20）的一侧面，所述第一加强部（43）的长度沿所述第一方向延伸，至少部分所述泄压槽（41）设置于所述第一加强部（43）内，且所有的电芯（2）的泄压阀均与所述泄压槽（41）相通。
  2. 根据权利要求1所述的电池模组，其中，所述支撑件（4）还包括第二加强部（44），所述基板（42）邻近于所述电芯组（20）沿第二方向的两端位置分别设置有至少一个第二加强部（44），且所述第二加强部（44）的长度沿所述第一方向延伸，所述第二加强部（44）设置为抵紧所述箱盖（3）靠近所述电芯组（20）的一侧面，其中，所述第一方向与所述第二方向呈夹角设置。
  3. 根据权利要求2所述的电池模组，其中，所述基板（42）、所述第一加强部（43）和所述第二加强部（44）一体成型；或，
    所述基板（42）、所述第一加强部（43）和所述第二加强部（44）可拆卸连接。
  4. 根据权利要求2或3所述的电池模组，其中，满足以下至少之一：
    所述第一加强部（43）和所述第二加强部（44）中的至少之一朝向所述箱盖（3）一侧凹陷设置有第一胶槽（45），所述第一胶槽（45）的长度沿所述第一方向延伸，所述第一胶槽（45）设置为容纳结构胶（5）；
    所述基板（42）朝向所述电芯组（20）一侧设置有多个第二胶槽，所述第二胶槽的长度沿所述第一方向延伸，所述第二胶槽设置为容纳结构胶。
  5. 根据权利要求2-4任一项所述的电池模组，其中，所述基板（42）和所述第一加强部（43）可拆卸连接，所述第一加强部（43）包括主体部（431）和连接部（432），所述主体部（431）沿所述第一方向延伸，所述主体部（431）朝向所述电芯组（20）的一侧设置有所述泄压槽（41），所述主体部（431）沿所述第二方向的两侧分别凸出设置有所述连接部（432），所述连接部（432）与所述基板（42）可拆卸连接，所述基板（42）上贯穿设置有多个连通口（46），所述泄压阀通过所述连通口与所述泄压槽（41）连通。
  6. 根据权利要求5所述的电池模组，其中，所述基板（42）上凹陷设置有限位槽（47），且所述限位槽（47）的长度沿所述第一方向延伸，所述连接部（432）及所述主体部（431）邻近所述电芯组（20）一端均粘接于所述限位槽（47）的槽底，所述限位槽（47）的槽底贯穿设置有多个连通口（46），且所述连通口（46）沿第三方向的投影位于所述泄压槽（41）内，每个电芯（2）的泄压阀对应设置有一个连通口，其中，所述第一方向、所述第二方向和所述第三方向相互呈夹角设置。
  7. 根据权利要求2-4任一项所述的电池模组，其中，所述基板（42）和所述第一加强部（43）一体成型，所述泄压槽（41）设置于所述基板（42）朝向所述电芯组（20）一侧，且所述泄压槽（41）的深度沿第三方向延伸至所述第一加强部（43）内，其中，所述第一方向、所述第二方向和所述第三方向相互呈夹角设置。
  8. 根据权利要求1-7任一项所述的电池模组，其中，所述泄压槽（41）的长度沿所述第一方向延伸并贯穿所述支撑件（4）沿所述第一方向排列的至少一侧面。
  9. 根据权利要求1-7任一项所述的电池模组，还包括导电片（6），所述支撑件（4）为绝缘支撑件，所述支撑件（4）上相对所述电芯（2）的极柱位置贯穿设置有安装口（48），所述导电片（6）设置在所述支撑件（4）上，且部分所述导电片（6）穿过所述安装口（48）以连接所述电芯（2）的极柱。
  10. 根据权利要求1-7任一项所述的电池模组，其中，满足以下至少之一：
    所述支撑件（4）与所述电芯组（20）抵接；
    所述电池模组还包括安装梁（7），所述电芯组（20）沿所述第一方向的两侧均设置有所述安装梁（7），且所述安装梁（7）的长度沿第二方向延伸，所述支撑件（4）连接于所述安装梁（7）上，其中，所述第一方向与所述第二方向呈夹角设置；
    所述电池模组还包括云母纸，所述泄压槽（41）内粘贴有所述云母纸。
  11. 根据权利要求1-7任一项所述的电池模组，其中，所述电池模组还包括安装梁（7）和泡棉，所述电芯组（20）沿所述第一方向的两侧均设置有所述安装梁（7），且所述安装梁（7）的长度沿第二方向延伸，所述支撑件（4）连接于所述安装梁（7）上，所述泡棉设置于所述安装梁（7）上，所述泡棉远离所述安装梁（7）一侧与所述箱盖（3）抵接，其中，所述第一方向与所述第二方向呈夹角设置。
  12. 一种汽车，包括车架（8）和如权利要求1-11任一项所述的电池模组，所述电池模组可拆卸连接于所述车架的底部，所述电池模组的箱盖（3）为所述汽车的底板。
PCT/CN2024/109362 2024-07-03 2024-08-02 电池模组及汽车 Pending WO2024255923A1 (zh)

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CN218919154U (zh) * 2022-11-25 2023-04-25 蜂巢能源科技股份有限公司 电池包及车辆
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