WO2023240391A1 - 电池包及用电装置 - Google Patents

电池包及用电装置 Download PDF

Info

Publication number
WO2023240391A1
WO2023240391A1 PCT/CN2022/098370 CN2022098370W WO2023240391A1 WO 2023240391 A1 WO2023240391 A1 WO 2023240391A1 CN 2022098370 W CN2022098370 W CN 2022098370W WO 2023240391 A1 WO2023240391 A1 WO 2023240391A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery pack
bottom cover
battery
cover
carrier
Prior art date
Application number
PCT/CN2022/098370
Other languages
English (en)
French (fr)
Inventor
陈兴地
王鹏
秦峰
Original Assignee
宁德时代新能源科技股份有限公司
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 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to KR1020247012987A priority Critical patent/KR20240060675A/ko
Priority to EP22946092.8A priority patent/EP4425658A1/en
Priority to CN202280005969.0A priority patent/CN116249630A/zh
Priority to PCT/CN2022/098370 priority patent/WO2023240391A1/zh
Priority to CN202223290764.8U priority patent/CN219226517U/zh
Priority to PCT/CN2023/070125 priority patent/WO2023155620A1/zh
Priority to KR1020247018342A priority patent/KR20240096639A/ko
Priority to CN202410820399.1A priority patent/CN118610662A/zh
Priority to KR1020247018661A priority patent/KR20240099426A/ko
Priority to CN202380008510.0A priority patent/CN116868417B/zh
Priority to CN202320014525.5U priority patent/CN219575787U/zh
Priority to CN202380008506.4A priority patent/CN116686151A/zh
Priority to KR1020247022516A priority patent/KR20240117127A/ko
Priority to PCT/CN2023/070129 priority patent/WO2023160252A1/zh
Priority to CN202380008512.XA priority patent/CN116848705B/zh
Priority to PCT/CN2023/070126 priority patent/WO2023155621A1/zh
Priority to CN202320014583.8U priority patent/CN219203337U/zh
Publication of WO2023240391A1 publication Critical patent/WO2023240391A1/zh
Priority to US18/666,273 priority patent/US20240304930A1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • 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
    • 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
    • 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
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • 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

  • This application relates to the field of battery technology, and in particular to battery packs and electrical devices.
  • the endurance of battery packs has always been the focus of attention in the field of new energy vehicles. At present, the endurance of battery packs is generally not high. Improving the endurance of battery packs is an urgent problem that needs to be solved.
  • this application provides a battery pack and an electrical device.
  • the application provides a battery pack, including a box and a battery cell.
  • the box is enclosed to form a receiving cavity.
  • the box includes a bottom cover located at its bottom and used to define the receiving cavity.
  • the battery cells are accommodated in In the accommodation cavity, the bottom cover has a characteristic surface facing the accommodation cavity, and the characteristic surface is configured as a plane.
  • the characteristic surface when the characteristic surface is a plane, a relatively equal distance can be maintained between the characteristic surface and each battery cell accommodated in the accommodation cavity (this distance can be zero).
  • this distance can be zero.
  • the accommodation cavity can accommodate more battery cells, that is, the space utilization rate of the accommodation cavity is higher, and the battery pack can have a higher energy density. Higher battery life.
  • the area S1 of the orthographic projection of the characteristic surface and the area S2 of the orthographic projection of the bottom cover satisfy: S1/S2 ⁇ 0.2.
  • the battery pack has high energy density and good endurance.
  • the orthographic projection of the feature surface is rectangular. At this time, more battery cells can be arranged in the accommodation cavity to increase the energy density of the battery pack.
  • the bottom cover has a cover portion and a mounting portion.
  • the mounting portion is connected to an edge of the cover portion.
  • the cover portion is used to define the accommodation cavity.
  • the mounting portion is mounted on The part of the box except the bottom cover.
  • the inner surface of the cover portion facing the accommodation cavity is configured to form the characteristic surface.
  • the bottom cover defines the accommodation cavity through the cover part and is connected to the main body through the mounting part. The structure is clear and easy to install.
  • an outer surface of the cover facing away from the accommodation cavity is parallel to the characteristic surface.
  • the flat outer surface of the cover can greatly reduce the wind resistance generated by the battery pack, help reduce the vehicle's driving resistance, reduce the vehicle's driving energy consumption, and improve the battery pack's endurance.
  • the cover portion protrudes in a direction away from the accommodation cavity compared to the mounting portion. At this time, the cover portion protrudes relative to the installation portion, and the cover portion of the bottom cover can be used as a reinforcing structure of the bottom cover to improve the bending resistance of the bottom cover.
  • the cover portion and the mounting portion have the same thickness. At this time, the structure of the bottom cover is simpler and the processing is more convenient.
  • the bottom cover is spaced apart from the battery cells. At this time, it can be avoided that the external force acting on the bottom cover is transmitted to the battery cells and damages the battery cells. Especially when the battery pack is installed at the bottom of the vehicle and the bottom cover is at the lowest position of the battery pack, stones on the ground may occur while the vehicle is driving. If it is easy to fly to the bottom of the battery pack and hit the bottom cover, the buffer space can interrupt the external force transmitted to the battery cells and affect the battery cells.
  • the box further includes a bearing member located on top of itself, the bearing member is used to define the accommodation cavity, and the battery cells are suspended from the bearing member. At this time, the battery cells are suspended below the carrier, and the bottom cover is located at the bottom of the box.
  • the battery cells can be exposed by removing the bottom cover without removing the carrier; at the same time, When repairing the battery pack, the battery cells can be disassembled and installed on the carrier from below.
  • the carrier is stressed as at least part of the vehicle chassis, the battery cells only need to be disassembled and installed from below the carrier without disassembly.
  • the load-bearing part facilitates the maintenance of the battery pack.
  • the battery cells suspended on the carrier can enhance the strength of the carrier, thereby improving the rigidity of the top of the battery pack.
  • the outer surface of the battery cell facing the carrier is the first outer surface
  • the battery cell includes electrode terminals, and the electrode terminals are arranged on the outer surface of the battery cell except the first outer surface.
  • the electrode terminals are located on the outer surface of the battery cell except the first outer surface, and various components connected to each electrode terminal (such as sampling wire harness, high-voltage wire harness, protective structure, etc.) can pass between the battery cell and the bottom cover.
  • the space between the battery cells and/or the space between the battery cells and the inner side of the main body is arranged, making it more convenient to arrange the various components.
  • the battery cells can be attached to the carrier, which can save the space between the battery cells and the carrier and improve the space utilization of the battery pack. .
  • the battery cell has a second outer surface disposed opposite to the first outer surface, and the electrode terminals are disposed on the second outer surface.
  • the wire harness and connecting piece connected to the electrode terminal can be arranged in the buffer space.
  • the buffer space can also block the external force hitting the bottom cover from acting on the battery cells and damaging the battery cells. Therefore, the buffer space can not only interrupt the influence of external forces, but also enable the layout of wiring harnesses, etc., killing two birds with one stone.
  • the battery cells are bonded to the carrier.
  • the connection between the battery cell and the carrier is not only convenient, but also the structure of the battery pack can be simplified.
  • the main body includes a frame and a carrier.
  • the frame encloses a cavity that is disposed at both ends in the vertical direction.
  • the bottom cover and the carrier are respectively covered at opposite sides of the cavity in the vertical direction.
  • the bottom cover, the frame and the bearing member jointly form a receiving cavity.
  • the frame is used as the basis, and the bearing member and the bottom cover are respectively connected to both ends of the frame in the vertical direction to form a receiving cavity for the battery pack, and the box structure is relatively simple.
  • the bearing member is fixedly connected to or integrally formed with the frame.
  • the main body is integrally formed, the main body only needs to be connected to the bottom cover to assemble the box, and the box is easy to assemble.
  • the carrier and the frame are fixedly connected, the molding process of the carrier and the frame is easier, which can reduce the process cost of the box.
  • this application also provides an electrical device, including the above-mentioned battery pack.
  • the battery pack is used to provide electrical energy to the electrical device.
  • the electrical device includes a vehicle, and the battery pack is disposed at the bottom of the vehicle body. At this time, placing the battery pack at the bottom of the car body does not occupy the space inside the car body, which helps to reduce the volume and weight of the car body.
  • the main body includes a bearing member located on the top of the box, the bearing member is used to define the accommodation cavity, and the battery pack is installed on the vehicle body via the bearing member.
  • the structure formed by the battery cells and the carrier is connected to the vehicle body, which can improve the strength of the top of the battery pack and thereby improve the installation strength of the battery pack.
  • the carrier is configured to form at least a portion of the vehicle body chassis.
  • the space occupied by the gap between the traditional chassis and the battery pack can be divided into the battery pack to increase the space of the battery pack. This will help to increase the energy of the battery pack, thereby improving the vehicle's endurance.
  • Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Figure 2 is a schematic structural diagram of a battery cell provided by some embodiments of the present application.
  • FIG. 3 is a schematic structural diagram of a battery pack provided by some embodiments of the present application.
  • FIG 4 is an exploded structural view of the battery pack shown in Figure 3;
  • Figure 5 is a schematic structural diagram of the bottom cover provided in some embodiments of the present application.
  • Figure 6 is a top view of the bottom cover described in Figure 5;
  • Figure 7 is a front view of the bottom cover shown in Figure 5;
  • Figure 8 is a schematic structural diagram of a bottom cover provided in other embodiments of the present application.
  • Figure 9 is a cross-sectional view of the battery pack shown in Figure 4.
  • Figure 10 is a schematic orthographic view of the bottom cover shown in Figure 6 in the vertical direction;
  • Figure 11 is a schematic diagram of the appearance of a battery cell in some embodiments of the present application.
  • Figure 12 is a front view of the battery cell shown in Figure 11;
  • Figure 13 is a schematic structural diagram of a bearing member in some embodiments of the present application.
  • Figure 14 is a schematic structural diagram of a bearing member in other embodiments of the present application.
  • Figure 15 is an orthographic view of the bearing member shown in Figure 14 in the vertical direction;
  • Figure 16 is a front view of the battery pack shown in Figure 4.
  • Figure 17 is a schematic diagram of the battery pack applied to the vehicle body in some embodiments of the present application.
  • Figure 18 is a first exploded state diagram of the structure shown in Figure 17;
  • Figure 19 is a second exploded state diagram of the structure shown in Figure 17;
  • Figure 20 is a schematic diagram of the installation relationship between the battery pack and the vehicle body in some embodiments of the present application.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • multiple refers to more than two (including two).
  • multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to It is more than two pieces (including two pieces).
  • Battery packs are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. . As the application fields of battery packs continue to expand, their market demand is also expanding.
  • the bottom cover of the existing battery pack box is usually protruding outward.
  • the purpose is to prevent the external force hitting the bottom cover from being transmitted to the battery cells through the bottom cover, so that the bottom cover protrudes.
  • the occupied space reduces the space utilization of the battery pack, thereby reducing the energy density of the battery pack, which is not conducive to improving the endurance of the battery pack.
  • the bottom cover can be designed in a flat shape to reduce the occupation of the accommodation cavity by the bottom cover itself, and use as much space as possible for installing battery cells to increase the energy of the battery pack. density and endurance.
  • the battery pack includes a box and a battery cell.
  • the box is enclosed to form a containing cavity.
  • the body includes a bottom cover located at its bottom and used to define a receiving cavity.
  • the battery cells are received in the receiving cavity, wherein the bottom cover has a characteristic surface facing the receiving cavity, and the characteristic surface is configured as a plane.
  • the characteristic surface is a plane, the characteristic surface can maintain a relatively equal distance from each battery cell accommodated in the accommodation cavity (this distance can be zero).
  • the accommodation cavity can accommodate more battery cells, that is, the space utilization rate of the accommodation cavity is higher, and the battery pack can have a higher energy density. Higher battery life.
  • the battery pack disclosed in the embodiments of the present application can be, but is not limited to, used in electrical devices such as vehicles, ships, or aircraft.
  • the battery pack disclosed in this application can be used to form a power supply system of the electrical device.
  • the installation body involved in this application is a structure used to install a battery pack in an electrical device.
  • Embodiments of the present application provide an electrical device that uses a battery pack as a power source.
  • the electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • a vehicle 1000 is used as an example of an electrical device according to an embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the battery pack 100 is disposed inside the vehicle 1000 , and the battery pack 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery pack 100 may be used to power the vehicle 1000 , for example, the battery pack 100 may serve as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller and a motor. The controller is used to control the battery pack 100 to provide power to the motor, for example, for starting, navigation, and operating power requirements of the vehicle 1000 while driving.
  • the battery pack 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • FIG. 2 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the battery cell 20 refers to the smallest unit that constitutes the battery pack 100 .
  • the battery cell 20 includes an end cover 21 , a case 22 , an electrode assembly 23 and other functional components.
  • the end cap 21 refers to a component that covers the opening of the case 22 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap 21 can be adapted to the shape of the housing 22 to fit the housing 22 .
  • the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 21 is less likely to deform when subjected to extrusion and collision, so that the battery cell 20 can have higher durability. Structural strength and safety can also be improved.
  • the end cap 21 may be provided with functional components such as electrode terminals 21a.
  • the electrode terminal 21a may be used to electrically connect with the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20 .
  • the end cap 21 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold.
  • the end cap 21 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • an insulating member may also be provided inside the end cover 21, and the insulating member may be used to isolate the electrical connection part 11a2 in the housing 22 from the end cover 21 to reduce the risk of short circuit.
  • the insulating member may be plastic, rubber, etc.
  • the housing 22 is a component used to cooperate with the end cover 21 to form an internal environment of the battery cell 20 , wherein the formed internal environment can be used to accommodate the electrode assembly 23 , electrolyte, and other components.
  • the housing 22 and the end cover 21 may be independent components, and an opening may be provided on the housing 22.
  • the end cover 21 covers the opening at the opening to form the internal environment of the battery cell 20.
  • the end cover 21 and the housing 22 can also be integrated.
  • the end cover 21 and the housing 22 can form a common connection surface before other components are put into the housing. When it is necessary to encapsulate the inside of the housing 22 When, the end cover 21 is closed with the housing 22 again.
  • the housing 22 can be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23 .
  • the housing 22 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiments of the present application.
  • the electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur.
  • One or more electrode assemblies 23 may be contained within the housing 22 .
  • the electrode assembly 23 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and usually a separator is provided between the positive electrode sheets and the negative electrode sheets.
  • the portions of the positive electrode sheet and the negative electrode sheet that contain active material constitute the main body 11 of the electrode assembly 23 , and the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material are constituted separately.
  • the positive electrode tab and the negative electrode tab can be located together at one end of the main body 11 or respectively located at both ends of the main body 11 .
  • the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminal 21a to form a current loop.
  • FIG. 3 is a schematic structural diagram of a battery pack 100 provided by some embodiments of the present application
  • FIG. 4 is an exploded structural view of the battery pack 100 shown in FIG. 3
  • An embodiment of the present application provides a battery pack 100, which includes a battery cell 20 and a box 10.
  • the box 10 is formed with a receiving cavity s. 20 is accommodated in the accommodation cavity s.
  • the battery pack 100 there may be a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the plurality of battery cells 20 are connected in series and in parallel.
  • the plurality of battery cells 20 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 20 can be accommodated in the box 10 ; of course, the battery pack 100 can also be a plurality of battery cells. 20 are first connected in series, parallel or mixed to form a battery module form, and then multiple battery modules are connected in series, parallel or mixed to form a whole, and are accommodated in the box 10 .
  • the battery pack 100 may also include other structures.
  • the battery pack 100 may further include a bus component for realizing electrical connections between multiple battery cells 20 .
  • Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes.
  • the box 10 can be in various shapes, such as a cylinder, a cuboid, etc., and the specific structure of the box 10 can be in a variety of structural ways.
  • the box 10 includes a main body 11 and a bottom cover 12 disposed at the bottom of the main body 11 .
  • the bottom cover 12 and the main body 11 together form a receiving cavity for accommodating the battery cells 20 . s.
  • the main body 11 may be an integrally formed structure, or may be assembled from multiple parts.
  • the main body 11 may be a hollow shell 22 structure, which defines a first space.
  • the bottom of the first space is open, and the bottom cover 12 is closed in the opening of the first space.
  • the bottom cover 12 may have a hollow structure with one side open, and may have a second space.
  • the second space provided by the bottom cover 12 and the first space provided by the main body 11 integrally form an accommodation cavity s.
  • the bottom cover 12 itself does not need to have a space for forming the accommodation cavity s.
  • a receiving cavity s that is equivalent to the first space is formed, and at this time, the bottom cover 12 can have a flat-plate structure.
  • the accommodation cavity s of the box 10 can also be formed by part of the first space provided by the main body 11.
  • the bottom cover 12 can be closed in the opening of the first space and recessed into the first space to occupy the second space.
  • a partial space of one space, the first space, excluding the partial space occupied by the bottom cover 12 forms the accommodation cavity s of the box 10 .
  • the bottom cover 12 is located at the bottom of the box 10 and is used to define the accommodation cavity s together with the main body 11 .
  • the bottom cover 12 may be, but is not limited to, a plate-shaped structure, a block-shaped structure, etc., and may be flat-plate-shaped, bent-plate-shaped, etc., and is not specifically limited.
  • the battery cell 20 When the battery cell 20 is located in the accommodation cavity s, the battery cell 20 may be disposed on the bottom cover 12 and/or the main body 11 .
  • the battery cell 20 may be provided on one of the parts or on all the parts.
  • the main body 11 may include a top cover (not shown), a surrounding plate (not shown) and a support plate (not shown).
  • the surrounding plate encloses a third door with openings at both ends in the vertical direction. Three spaces, the top cover and the bottom cover 12 are sealed and closed at both ends of the third space in the vertical direction.
  • the top cover, the enclosure plate and the bottom cover 12 are jointly enclosed to form an accommodation cavity s.
  • the support plate is located in the third space.
  • the battery cells 20 are supported on the support plate.
  • the main body 11 may include a bearing member 11a and a frame 11b described below, with details provided below.
  • the bottom cover 12 and the main body 11 can be fixed by welding, hot-melt connection, adhesion, fastening connection, snap connection, etc.
  • the fastening connection refers to the connection achieved through fasteners 13, and the fasteners 13 include bolts, pins, rivets, pins, screws and other components.
  • snap-in refers to the fixation through a snap-in structure.
  • the bottom cover 12 has a hook and the main body 11 has a bayonet. When the hook is engaged in the bayonet, the bottom cover 12 and the main body 11 can be locked and fixed.
  • the connection method between the bottom cover 12 and the main body 11 is not limited to this, and is not exhaustive in this application.
  • the bottom cover 12 is sealingly connected to the main body 11 and together form a closed accommodation cavity s.
  • sealing connection between the bottom cover 12 and the main body 11 may be but are not limited to: a sealing member is provided between the bottom cover 12 and the main body 11 , and the bottom cover 12 and the main body 11 are sealingly connected through the sealing member; 11 are sealedly connected by sealant; the bottom cover 12 and the main body 11 are plugged into each other and sealedly connected by a blocking structure formed by the plugging surface.
  • the box 10 of the battery pack 100 is enclosed by its bottom cover 12 and its main body 11 to form a sealed accommodation cavity s. There is no need to install other additional sealing structures in the box 10, which can simplify the structure of the battery pack 100. , reduce the cost of the battery pack 100, and ensure the safety and service life of the battery pack 100.
  • the bottom cover 12 of the battery pack 100 is located at the bottom of the main body 11 , that is, the bottom cover 12 is located at the bottom of the main body 11 in the up and down directions shown in FIGS. 3 and 4 .
  • the up and down orientation shown in FIG. 3 and FIG. 4 may be, but is not limited to, the vertical direction, depending on the actual installation situation of the battery pack 100 .
  • the vertical direction is used as a reference to describe the positional relationship, size, etc. of each structure of the battery pack 100. This does not limit the use of the battery pack 100, but is only for the purpose of Elaborate and explain the plan more clearly.
  • the bottom cover 12 is sealingly connected to the main body 11 via a seal.
  • Seals refer to components that can prevent fluids or solid particles from leaking from between adjacent joint surfaces, and can prevent external impurities such as dust and moisture from intruding into the battery pack 100 .
  • the sealing member sealingly connecting the main body 11 and the bottom cover 12 means that the sealing member is connected between the two opposite surfaces of the main body 11 and the bottom cover 12 and has a ring-shaped contact interface with the two surfaces to prevent external moisture. It enters the interior of the battery pack 100 through the contact section between itself and the two surfaces, thereby achieving a sealing effect.
  • Seals can be optional sealing rings and gaskets.
  • the sealing member may be made of rubber, silicone or other materials.
  • the seals can be O-shaped seals, square seals, special-shaped seals, etc.
  • the specific shape of the seal can be adapted to the shapes of the two opposite surfaces of the bottom cover 12 and the main body 11 .
  • the sealing member may be an O-shaped sealing member.
  • the bottom cover 12 is sealed with the main body 11 through the sealing member, and the sealing is reliable and the cost is low.
  • the bottom cover 12 after the bottom cover 12 is sealed with the main body 11 through a sealing member, it can also be fixedly connected to the main body 11 in other ways. Other methods include but are not limited to snapping, plugging, threaded connection, riveting, welding, bonding, etc. Understandably, when the bottom cover 12 is sealed with the main body 11 through sealant, according to the adhesiveness of the sealant, when the adhesive performance of the sealant is good and meets the requirements (that is, the bottom cover 12 and the main body 11 are fixed and not separated) It is also possible to fixedly connect the two without taking other methods.
  • the bottom cover 12 is detachably connected to the bottom of the main body 11 .
  • the detachable connection between the bottom cover 12 and the main body 11 means that when the bottom cover 12 is connected to the main body 11 , the bottom cover 12 has a first state in which it is completely connected to the main body 11 and forms the accommodation cavity s and is not completely connected or separated from the main body 11 .
  • the second open state of the battery cell 20 can be exposed, and the bottom cover 12 can be switched from the first state to the second state under external force operation, and can be switched from the second state to the first state without damaging any parts in the process. .
  • the installation method of the bottom cover 12 and the main body 11 can be: the bottom cover 12 and the main body 11 are rotatably connected and can be connected via The fastener 13 or the snapping method realizes the fixed connection.
  • the bottom cover 12 rotates relative to the main body 11 to close the accommodation cavity s
  • the bottom cover 12 and the main body 11 can be fixedly connected to the main body 11 through fasteners 13 or snapping methods, and the battery cells 20 are accommodated in the accommodation cavity s without being visible. , at this time the bottom cover 12 is in the first state.
  • the bottom cover 12 can rotate relative to the main body 11 to a position where the accommodation cavity s is opened and the battery cells 20 are exposed. At this time, the bottom cover 12 is in the second state.
  • the rotatable connection between the bottom cover 12 and the main body 11 may be, but is not limited to, the bottom cover 12 and the main body 11 being rotatably connected through a rotating shaft.
  • the bottom cover 12 and the main body 11 can be installed in the following manner: the bottom cover 12 and the main body 11 are only connected through the fastener 13 or by snap-fitting. way to achieve a fixed connection.
  • the fasteners 13 are installed on the bottom cover 12 and the main body 11 or the engaging structures of the bottom cover 12 and the main body 11 are engaged, the bottom cover 12 and the main body 11 are completely fixed and jointly form the accommodation cavity s, and the battery cell 20 It is accommodated in the accommodation cavity s and cannot be seen.
  • the bottom cover 12 is in the first state.
  • the fasteners 13 are removed or all snap connections are released, the bottom cover 12 can be separated from the main body 11 to expose the battery cells 20.
  • the bottom cover 12 is in the second state.
  • the bottom cover 12 When the bottom cover 12 is in the first state, it forms an accommodation cavity s with the main body 11 to protect the battery cells 20 . When the bottom cover 12 is in the second state, the battery pack 100 body is exposed, which facilitates relevant personnel to maintain or replace the battery cells 20 .
  • the bottom cover 12 and the main body 11 are detachably connected via fasteners 13 .
  • Fastener 13 refers to a component that can fasten two or more parts (or components) into a whole, which can be but is not limited to: screws, bolts, rivets, pins, pins, welding nails, etc. .
  • the bottom cover 12 and the main body 11 are detachably connected through the fasteners 13, which is not only convenient for disassembly and assembly, but also has a simple structure and is economical.
  • Figure 5 is a schematic structural diagram of the bottom cover 12 provided in some embodiments of the present application.
  • Figure 6 is a top view of the bottom cover 12 shown in Figure 5 .
  • Figure 7 is a front view of the bottom cover 12 shown in Figure 5 .
  • FIG. 8 is a schematic structural diagram of the bottom cover 12 provided in other embodiments of the present application.
  • the minimum thickness h of the bottom cover 12 satisfies: 0.2mm ⁇ h ⁇ 20mm.
  • the thickness of the bottom cover 12 refers to the distance between the two vertical surfaces of the bottom cover 12 in a vertical cross section.
  • the minimum thickness h of the bottom cover 12 is the shortest distance between the two vertical sides of the bottom cover 12 .
  • the bottom cover 12 can be flat-shaped (as shown in FIG. 8 ), and the minimum thickness of the bottom cover 12 is the equal thickness of the bottom cover 12 everywhere.
  • the minimum thickness of the bottom cover 12 is the thickness of the thinnest part of the bottom cover 12 .
  • the minimum thickness h of the bottom cover 12 can be selected from 0.3mm, 0.5mm, 0.8mm, 1mm, 1.5mm, 1.8mm, 2mm, 2.5mm, 2.8mm, 3mm, 3.5mm, 3.8mm, 4mm, 4.5mm , 4.7mm, 5mm, 5.5mm, 5.8mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5 mm, 14mm, 14.5mm, 15mm, 16mm, 16.5mm, 17mm, 17.5mm, 18mm, 18.5mm, 19mm, 19.5mm, etc.
  • the vertical direction is used as a reference, and the "thickness" of a certain structure refers to the distance between the two surfaces of the structure in the vertical direction on the cross section in the vertical direction.
  • the vertical direction is only for more convenient explanation of the solution of the present application, and does not limit the use mode of the battery pack 100 .
  • the weight m of the battery cell 20 and the minimum wall thickness h of the bottom cover 12 satisfy: 0.03mm/Kg ⁇ h/m ⁇ 100mm/Kg.
  • the weight m of the battery cell 20 refers to the weight m of a single battery cell 20 .
  • the weight of the battery cells 20 is the weight of each battery cell 20 .
  • the ratio of the minimum wall thickness h of the bottom cover 12 to the weight m of the battery cell 20 can be selected from 0.04mm/Kg, 0.05mm/Kg, 0.1mm/Kg, 0.4mm/Kg, 0.8mm/Kg, 1mm /Kg, 1.5mm/Kg, 2mm/Kg, 2.5mm/Kg, 3mm/Kg, 3.5mm/Kg, 4mm/Kg, 5mm/Kg, 6mm/Kg, 8mm/Kg, 10mm/Kg, 12mm/Kg, 13mm/Kg, 15mm/Kg, 16mm/Kg, 18mm/Kg, 20mm/Kg, 30mm/Kg, 35mm/Kg, 40mm/Kg, 45mm/Kg, 50mm/Kg, 55/Kg, 60mm/Kg, 65mm/ Kg, 68mm/Kg, 70mm/Kg, 75mm/Kg, 80mm/Kg, 85mm/Kg, 90mm/Kg, 95
  • Table 1 The impact of the ratio of the minimum wall thickness h of the bottom cover 12 to the weight m of the battery cell 20 on the safety performance of the battery pack 100
  • Table 1 shows the ratio of the minimum wall thickness h of several sets of bottom covers 12 and the weight m of the battery cells 20 to the battery pack 100 when tested according to the standards of GB 38031-2020 "Safety Requirements for Power Batteries for Electric Vehicles" Safety performance impact test results. It can be seen from Table 1 that when h/m is equal to 0.02mm/Kg, the battery pack 100 is prone to fire and explosion. The reason is that the structural strength of the battery pack 100 cannot meet the requirements. When h/M is greater than 0.02mm/Kg, the structural strength of the bottom cover 12 is better, and the battery pack 100 is less likely to catch fire and explode. However, if h/m is too large, it will easily cause space waste and low energy density, so h/m is best. No more than 100mm/Kg.
  • the battery pack 100 not only has better structural strength, but also has better energy density. It is high and not easy to catch fire or explode.
  • the bottom cover 12 has a cover part 12a and a mounting part 12b.
  • the mounting part 12b is connected to the edge of the cover part 12a.
  • the cover part 12a is used to define the accommodation cavity s.
  • the mounting part 12b is connected to the main body 11.
  • the use of the cover 12a to define the accommodation cavity s means that the cover 12a and the main body 11 together form the accommodation cavity s, and the mounting part 12b is connected to the main body 11 and does not participate in the definition of the accommodation cavity s.
  • the cover part 12a may be a plate-shaped or block-shaped member, a flat plate-shaped or a curved plate-shaped member, and is not specifically limited.
  • the mounting portion 12b surrounding the edge of the cover portion 12a means that the mounting portions 12b are continuously arranged along the edge of the cover portion 12a to form a closed connection structure from end to end.
  • the mounting portion 12b when projected in the vertical direction, the mounting portion 12b has a certain width, so that it can have an appropriate contact area with the main body 11, which not only facilitates the positioning and installation between the mounting portion 12b and the main body 11, but also facilitates the installation of a seal. It also helps to improve the sealing performance between the mounting part 12b and the main body 11.
  • the cover part 12a and the mounting part 12b may be integrally formed.
  • the cover portion 12a and the mounting portion 12b can be integrally formed by die-casting, forging, hot pressing, cold pressing, etc.
  • the cover part 12a and the mounting part 12b can be integrally formed by injection molding.
  • the cover part 12a and the mounting part 12b may also be formed separately and then connected together.
  • the cover part 12a and the mounting part 12b are made of metal, the cover part 12a and the mounting part 12b can be welded or bonded together.
  • cover part 12a and the mounting part 12b are made of plastic material
  • the cover part 12a and the mounting part 12b can be bonded together.
  • the cover part 12a and the mounting part 12b can also be fixedly connected together by snapping, riveting or other methods.
  • the cover part 12a and the mounting part 12b may be located on the same plane. Specifically, optionally, the two surfaces of the cover portion 12a and the mounting portion 12b facing the main body 11 are in the same plane, and/or the two surfaces of the cover portion 12a and the mounting portion 12b facing away from the main body 11 are in the same plane.
  • the cover part 12a and the mounting part 12b facing the main body 11 and the two surfaces facing away from the main body 11 are respectively on the same plane, the cover part 12a and the mounting part 12b can form a flat bottom cover 12 ( As shown in Figure 8).
  • the cover part 12a and the mounting part 12b do not need to be located in the same plane. Specifically, the cover portion 12a is recessed toward the main body 11 relative to the mounting portion 12b, or the cover portion 12a protrudes toward the main body 11 relative to the mounting portion 12b, and is not specifically limited. The thickness of the cover part 12a and the mounting part 12b may be equal or different, and is not specifically limited.
  • the bottom cover 12 defines the accommodation cavity s through the cover part 12a, and is connected to the main body 11 through the mounting part 12b.
  • the structure is clear and easy to install.
  • the sealing connection method between the mounting part 12b and the main body 11 can be a sealing connection with a sealing member, a sealing glue sealing connection, etc., and the specific list is not exhaustive.
  • the sealing member may be the sealing member mentioned in the above description, and the arrangement of the sealing member may refer to the above description.
  • the difference is that the sealing member is disposed between the mounting part 12b and the main body 11 .
  • the bottom cover 12 when the bottom cover 12 is detachably connected to the main body 11, the bottom cover 12 is detachably connected to the main body 11 via the mounting portion 12b, that is, the mounting portion 12b is detachably connected to the main body 11.
  • the way in which the mounting part 12b is detachably connected to the main body 11 can refer to the detachable way between the bottom cover 12 and the main body 11 described in the above description. It is only necessary to set the part of the bottom cover 12 that is detachably connected to the main body 11 as the mounting part 12b. That's it, so the detachable connection method between the mounting part 12b and the main body 11 will not be described again here.
  • the mounting portion 12b is detachably connected to the main body 11 .
  • the bottom cover 12 also includes a fixing hole 12c provided on the mounting part 12b.
  • the fastener 13 passes through the fixing hole 12c on the mounting part 12b and is fastened to the main body 11.
  • the fixing hole 12c is a through hole that penetrates the mounting portion 12b in the vertical direction.
  • the fixing hole 12c can be a smooth through hole (such as when the fastener 13 is a rivet) or a threaded through hole (such as a fastener 13). When the fastener 13 is a screw), or other through holes (such as hexagonal holes, square holes, waist-shaped holes, etc.).
  • the specific form of the fixing hole 12c depends on the specific form and specific setting method of the fastener 13, and will not be described again here.
  • the cover portion 12a and the mounting portion 12b have the same thickness.
  • cover part 12a and the mounting part 12b When the cover part 12a and the mounting part 12b are integrally formed, they can be integrally formed in the manner described above, such as die-casting integrated molding, cold pressing integrated molding, hot pressing integrated molding, injection molding integrated molding, etc., which will not be described again here. Since the cover part 12a and the mounting part 12b have the same thickness, they can be quickly processed based on the same metal plate through stamping, cutting, etc. during molding.
  • the thickness of the cover part 12a and the mounting part 12b are equal, and the stress is equalized everywhere during molding, which can improve the molding rate of the one-piece molding, and can also be quickly processed by simple methods such as plate cutting.
  • the structure of the bottom cover 12 It is simpler and more convenient to process.
  • the cover portion 12a protrudes in a direction away from the accommodation cavity s compared to the mounting portion 12b.
  • the cover portion 12a defines the accommodation cavity s.
  • the fact that the cover portion 12a protrudes away from the accommodation cavity s means that the cover portion 12a protrudes away from the main body 11 . That is to say, the cover portion 12a and the mounting portion 12b are staggered in the vertical direction, and the cover portion 12a is at the lowest point of the bottom cover 12 .
  • a certain redundant space can be formed between the cover portion 12a and the mounting portion 12b.
  • This redundant space can increase the distance between the cover portion 12a and the battery cell 20.
  • an external force acts on the cover 12a, the external force can be reduced through this redundant space, thereby reducing or preventing the external force from acting on the battery cell 20 and causing damage to the battery cell 20, especially when the battery pack 100 is installed in a vehicle. 1000 bottom and the bottom cover 12 is at the lowest point of the battery pack 100, when the vehicle 1000 is driving, stones on the ground can easily fly to the bottom of the battery pack 100, that is, the bottom cover 12, and hit the bottom cover 12. At this time, there is redundant space.
  • the cover portion 12a protrudes relative to the mounting portion 12b, and the cover portion 12a of the bottom cover 12 can serve as a reinforcing structure of the bottom cover 12 to improve the bending resistance of the bottom cover 12.
  • the bottom cover 12 is located at the bottom of the box 10 and is used to define the accommodation cavity s.
  • FIG. 9 is a cross-sectional view of the battery pack 100 shown in FIG. 4 .
  • the bottom cover 12 is spaced apart from the battery cells 20 .
  • the arrangement of the bottom cover 12 and the battery cells 20 at intervals means that a set distance r is maintained between the bottom cover 12 and the battery cells 20 in the vertical direction. Under the action of the set interval r, a buffer space is formed between the bottom cover 12 and the battery cell 20, which can prevent the external force acting on the bottom cover 12 from being transmitted to the battery cell 20 and damaging the battery cell 20, especially when When the battery pack 100 is installed at the bottom of the vehicle 1000 and the bottom cover 12 is at the lowest point of the battery pack 100, when the vehicle 1000 is traveling, stones on the ground can easily fly to the bottom of the battery pack 100 and hit the bottom cover 12. At this time, the buffer space can be Interrupting the transmission of external force to the battery cells 20 affects the battery cells 20 .
  • the way in which the bottom cover 12 is spaced apart from the battery cells 20 may be formed by the redundant space formed between the protruding cover part 12a and the mounting part 12b in the above embodiment, or it may be located in the main body 11 of the battery cell 20 A set distance is maintained between one end of the main body 11 facing the bottom cover 12 and one end of the main body 11 facing the bottom cover 12 . That is to say, the battery cell 20 is only located within a part of the accommodation cavity s defined by the main body 11 . It is located within the range of the accommodation cavity s defined by the bottom cover 12, thereby ensuring that the set distance r is maintained between the battery cells 20 and the bottom cover 12 to form a buffer space.
  • the battery pack 100 includes multiple battery cells 20 , all the battery cells 20 are spaced apart from the bottom cover 12 . Furthermore, in order to unify the size of the battery cells 20, the distance between each battery cell 20 and the bottom cover 12 is equal.
  • the bottom cover 12 has a characteristic surface d facing the accommodation cavity s, and the characteristic surface d is configured as a plane.
  • the characteristic surface d facing the accommodation chamber s indicates that the characteristic surface d is the inner surface of the bottom cover 12 capable of defining the accommodation chamber s.
  • the characteristic surface d is configured as a plane means that in the arrangement direction of the main body 11 and the bottom cover 12 , the characteristic surface d is a plane perpendicular to the arrangement direction. In actual conditions, when the main body 11 and the bottom cover 12 are arranged in the vertical direction, the characteristic surface d of the bottom cover 12 is a plane parallel to the horizontal plane. When the main body 11 and the bottom cover 12 are arranged in the horizontal direction, the characteristic surface d of the bottom cover 12 is a plane parallel to the vertical surface.
  • the characteristic surface d When the characteristic surface d is a plane, the characteristic surface d can maintain a relatively equal distance from each battery cell 20 accommodated in the accommodation cavity s (this distance can be zero). When the distance between the characteristic surface d and the battery cells 20 is kept relatively equal, the accommodation cavity s can accommodate more battery cells 20 , that is, the space utilization rate of the accommodation cavity s is higher, and the battery pack 100 can have a higher Energy density, battery pack 100 has higher endurance.
  • the characteristic surface d may be formed by the inner surface structure of the cover part 12a facing the accommodation cavity s. It can further be understood that when the bottom cover 12 is spaced apart from the battery cells 20 , the feature surface d is spaced apart from the battery cells 20 .
  • the outer surface of the cover 12a facing away from the accommodation cavity s is parallel to the characteristic surface d.
  • the outer surface of the cover 12a facing away from the accommodation cavity s is arranged opposite to the characteristic surface d in the vertical direction.
  • the outer surface of the cover 12a is used to be in contact with the atmospheric environment and withstand external force impact.
  • the cover part 12a When the outer surface of the cover part 12a is a plane flush with the characteristic surface d, especially when the bottom cover 12 and the main body 11 are arranged at the bottom of the vehicle 1000 in the vertical direction and the bottom cover 12 is located at the lowest part of the battery pack 100, the cover part 12a
  • the wind resistance generated by the battery pack 100 can be greatly reduced, which helps to reduce the driving resistance of the vehicle 1000, reduce the driving energy consumption of the vehicle 1000, and improve the endurance of the battery pack 100.
  • FIG. 10 is a schematic orthographic view of the bottom cover 12 shown in FIG. 6 in the vertical direction. Among them, S1 represents the projected area of the characteristic surface d, and S2 represents the projected area of the bottom cover 12 .
  • the area S1 of the orthographic projection of the feature surface d and the area S2 of the orthographic projection of the bottom cover 12 satisfy: S1/S2 ⁇ 0.2. Further, S1/S2 ⁇ 0.5.
  • the characteristic surface d is formed by the first characteristic edge d1, the second characteristic edge d2, the third characteristic edge d3, and the fourth characteristic edge d4 connected end to end.
  • the area S1 of the orthographic projection of the characteristic surface d is the area bounded by the first characteristic side d1, the second characteristic side d2, the third characteristic side d3 and the fourth characteristic side d4.
  • the area S2 of the orthographic projection of the bottom cover 12 is the area defined by the edge of the bottom cover 12 .
  • the ratio between the area S1 of the orthographic projection of the characteristic surface d and the area S2 of the orthogonal projection of the bottom cover 12 may be 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1.
  • Table 2 shows the impact of the ratio of the area S1 of the orthographic projection of several sets of characteristic surfaces d and the area S2 of the orthographic projection of the bottom cover 12 on the 100-mile cruising range of the battery pack tested according to the NEDC (New European Driving Cycle) standard.
  • S1/S2 is less than 0.2, the cruising range of the battery pack 100 is poor.
  • the reason is that when the characteristic surface d is small, the space utilization rate of the accommodation cavity s is low, and the number of battery cells 20 accommodated in the battery pack 100 is relatively large. Less, the energy density of the battery pack 100 is relatively low, resulting in a shorter cruising range of the battery pack 100 and poor test results.
  • the characteristic surface d is a plane, when the characteristic surface d occupies a larger area of the bottom cover 12 , the area of the inner surface of the bottom cover 12 that is concave or convex relative to the characteristic surface d becomes smaller.
  • the inner surface that is concave relative to the characteristic surface d will cause part of the space in the accommodation cavity s to be irregular and prevent the battery cells 20 from being installed, resulting in low space utilization of the accommodation cavity s.
  • Part of the space of the accommodation cavity s formed by the inner surface protruding relative to the characteristic surface d is also irregular and cannot accommodate the battery cells 20 , resulting in low space utilization of the accommodation cavity s.
  • the space utilization rate of the accommodation cavity s is low, the volume occupied by the battery cells 20 per unit space in the battery pack 100 is small, and the energy density of the battery pack 100 is low. Therefore, the larger the area of the bottom cover 12 occupied by the characteristic surface d, the greater the space utilization of the battery pack 100, the higher the energy density of the battery pack 100, and the better the cruising range of the battery pack 100.
  • the orthographic projection of the characteristic surface d is rectangular.
  • the rectangular characteristic surface d is an area enclosed by the first characteristic side d1 , the second characteristic side d2 , the third characteristic side d3 and the fourth characteristic side d4 .
  • a plurality of battery cells 20 are mostly assembled to form a rectangular structure.
  • the characteristic surface d is constructed in a rectangular shape, which can be adapted to the overall structure formed by the battery cells 20 in the battery pack 100, and is helpful for the storage cavity s. More battery cells 20 are arranged inside to increase the energy density of the battery pack 100 .
  • the orthographic projection of the characteristic surface d may also be in other shapes, such as circles, polygons, ellipses and other special shapes.
  • the main body 11 includes a bearing member 11a.
  • the bearing member 11a may be a component of the main body 11 used to define the accommodation cavity s (for example, the bearing member 11a is the top cover or frame mentioned above), or it may be a component that is not used to define the accommodation cavity s but is located within the accommodation cavity s. (For example, the bearing member 11a is the support plate mentioned above), and the details are not limited.
  • the bearing member 11a can be a component of the main body 11 that is directly connected to the bottom cover 12 (such as the frame mentioned above), or it can be a component that is not connected to the bottom cover 12 (such as the above (top cover mentioned in the article).
  • the battery cells 20 are disposed on the surface of the carrier 11a.
  • the bearing member 11 a is a component capable of bearing the weight of the battery cell 20 , and may be a bearing plate, a bearing rod, a bearing block, a bearing piece, a bearing frame, a bearing rope, etc., and is not specifically limited.
  • the battery cell 20 may be supported on the carrier 11a, and at this time, the battery cell 20 may be disposed above the carrier 11a.
  • the battery cell 20 may be hung on the carrier 11a. In this case, the battery cell 20 may be hung on a wall of the carrier 11a that is parallel to the gravity direction of the battery cell 20.
  • the battery cells 20 can be disposed above the carrier 11a (for example, when the carrier 11a serves as a support plate in the accommodation cavity s), and the battery cells 20 can also be disposed below the carrier 11a (for example, when the carrier 11a serves as a support plate).
  • the battery cells 20 may also be disposed on the side of the supporting member 11a (for example, when the supporting member 11a serves as a frame for defining the accommodating cavity s).
  • the battery cell 20 is bonded to the carrier 11a.
  • the battery cell 20 and the carrier 11a can be bonded with an adhesive such as epoxy resin glue, acrylate glue, etc., but the details are not limited.
  • an adhesive such as epoxy resin glue, acrylate glue, etc., but the details are not limited.
  • the bonding between the battery cells 20 and the carrier 11a not only facilitates the connection, but also simplifies the structure of the battery pack 100.
  • the battery cells 20 are disposed on the surface of the carrier 11a, and the minimum thickness H of the carrier 11a and the weight M of the battery pack 100 satisfy: 0.0002mm/kg ⁇ H/M ⁇ 0.2mm/kg.
  • the thickness of the carrier 11a refers to the distance between the surface on one side of the carrier 11a for placing the battery cells 20 and the other surface opposite to it.
  • the minimum thickness H of the carrier 11a refers to the minimum distance between the two surfaces of the carrier 11a in the vertical direction.
  • the thickness of the supporting member 11a refers to the minimum distance between the two side surfaces of the supporting member 11a in the horizontal direction.
  • the weight of the battery pack 100 includes the entire weight of the main body 11, the bottom cover 12, the battery cells 20 and other components (such as wiring harness, thermal management system, power management system, etc.).
  • the ratio between the minimum thickness H of the bearing member 11a and the weight M of the battery pack 100 can be designed as: 0.0003mm/kg, 0.0005mm/kg, 0.0008mm/kg, 0.001mm/kg, 0.003mm/kg, 0.005mm/kg, 0.008mm/kg, 0.01mm/kg, 0.03mm/kg, 0.05mm/kg, 0.06mm/kg, 0.08mm/kg, 0.1mm/kg, 0.12mm/kg, 0.15mm/kg, 0.16mm/kg, 0.19mm/kg, 0.02mm/kg.
  • Table 3 shows the impact of the ratio of the minimum thickness H of several sets of load-bearing members 11a to the weight M of the battery pack 100 on the safety performance of the battery pack 100 tested according to the standards of GB 38031-2020 "Safety Requirements for Power Batteries for Electric Vehicles" result.
  • H/M ratio does not exceed 0.0002mm/Kg
  • the battery pack 100 will catch fire and explode.
  • the reason is that the structural strength of the battery pack 100 does not meet the requirements.
  • the H/M ratio exceeds 0.0002mm/Kg, the battery pack 100 will not catch fire or explode.
  • the battery pack 100 accounts for a low proportion of the battery cells 20 in the unit volume, resulting in low space utilization.
  • the energy density of the battery pack 100 is too low, and the use cost of the battery pack 100 is high.
  • 0.0005mm/Kg ⁇ H/M ⁇ 0.1mm/Kg at this time, the structural strength of the battery pack 100 meets the requirements and the energy density of the battery pack 100 is high.
  • the battery pack 100 has a stronger endurance and will not catch fire. Explosions and other safety incidents.
  • the minimum thickness H of the bearing member 11a satisfies: 0.2mm ⁇ H ⁇ 20mm.
  • the minimum thickness H of the bearing member 11a may be: 0.3mm, 0.5mm, 0.8mm, 0.9mm, 1.0mm, 1.2mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm , 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 9mm, 10mm, 12mm, 15mm, 16mm, 18mm, 19mm.
  • 0.5mm ⁇ H ⁇ 10mm at this time, the bearing member 11a has better structural strength, the overall strength of the battery pack 100 is better, and the battery pack 100 is less likely to catch fire and explode.
  • the carrying member 11a occupies a small area of the entire battery pack 100, the battery pack 100 has a high space utilization rate, and the battery pack 100 has a high energy density.
  • the battery cells 20 are suspended from the carrier 11 a.
  • the fact that the battery cells 20 are suspended from the carrier 11a means that the battery cells 20 are arranged below the carrier 11a in the vertical direction, and the carrier 11a bears the weight of the battery cells 20.
  • the battery cells 20 are suspended from the carrier 11a in a manner including: the battery cells 20 are directly bonded to the lower surface of the carrier 11a; the battery cells 20 are connected to the carrier 11a through fasteners 13 and are located on the upper surface of the carrier 11a. Below, the battery cells 20 are hung on the carrier 11a through hooks and the like and are located below the carrier 11a.
  • the battery cells 20 are suspended below the carrier 11a, and the bottom cover 12 is located at the bottom of the box 10.
  • the battery cells 20 can be exposed by removing the bottom cover 12 without any need for maintenance. After removing the bearing member 11a, the maintenance of the battery pack 100 becomes more convenient.
  • the battery cells 20 can be disassembled and installed on the bearing member 11a from below. Especially when the bearing member 11a is stressed as at least part of the chassis of the vehicle 1000, it only needs to be removed from the bottom of the bearing member 11a.
  • the battery cells 20 can be disassembled and assembled without removing the carrying member 11a, which facilitates the maintenance of the battery pack 100.
  • FIG. 11 is a schematic diagram of the appearance of a battery cell 20 in some embodiments of the present application.
  • FIG. 12 is a front view of the battery cell 20 shown in FIG. 11 .
  • the outer surface of the battery cell 20 facing the carrier 11a is the first outer surface m1.
  • the battery cell 20 includes an electrode terminal 21a.
  • the electrode terminal 21a is arranged on the battery cell.
  • the outer surface of the body 20 except the first outer surface m1.
  • the electrode terminal 21a is used to electrically connect with the electrode assembly 23 inside the battery cell 20, and is used to output or input the electrical energy of the battery cell 20.
  • the electrode terminal 21a at least partially protrudes outside the battery cell 20 to be electrically connected to the outside.
  • the series connection and parallel connection between the battery cells 20 are realized by the series connection and parallel connection between the respective electrode terminals 21a.
  • the electrode terminal 21a has conductivity to achieve electrical transmission, and may be an aluminum electrode, a copper electrode, etc.
  • the electrode terminal 21a is arranged on the outer surface of the battery cell 20 except for the first outer surface m1.
  • the first outer surface m1 faces the carrier 11a and is usually a smooth surface without protruding or recessed structures such as electrode terminals 21a and liquid injection holes.
  • the first outer surface m1 is the upward outer surface of the battery cell 20.
  • the battery cell 20 includes the above-mentioned casing 22 and the end cover 21 .
  • the casing 22 and the end cover 21 form an internal environment in which the battery cell 20 accommodates the electrode assembly 23 .
  • the end cover 21 is located at one end of the case 22 , and the electrode terminal 21 a is arranged on the end cover 21 . At this time, any outer surface of the case 22 can be used as the first outer surface m1 of the battery cell 20 .
  • the electrode terminal 21a includes a positive terminal and a negative terminal.
  • the positive terminal is used for electrical connection with the positive electrode sheet in the electrode assembly 23, and the negative terminal is used for electrical connection with the negative electrode sheet in the electrode assembly 23.
  • the positive terminal and the negative terminal may be arranged on the same outer surface of the battery unit 20 (such as a square battery unit 20), or they may be arranged on two different outer surfaces of the battery unit 20 (such as a cylindrical battery). Monomer 20) on.
  • the first outer surface m1 is a surface of the battery cell 20 that is different from the two outer surfaces.
  • the battery pack 100 is usually also provided with components such as a sampling wire harness that electrically connects each battery cell 20, a high-voltage line speed, and a protective structure to protect the battery cells 20.
  • the electrode terminals 21a are arranged On other surfaces of the battery cell 20 except the first outer surface m1, when sampling components such as wire harnesses, high-voltage wire harnesses, and protective structures on the electrode terminal 21a, they will not be restricted by the carrier 11a and can be connected to the battery cell 20 through the battery cell 20.
  • the space between other structures of the main body 11 except the load-bearing member 11a makes it more convenient for each component to be arranged. Component settings.
  • the first outer surface m1 is a smooth surface, the first outer surface m1 can be attached to the carrier 11a. In this way, the battery cell 20 and the carrier 11a can be installed closely without the need to install the battery cell 20. Leaving a space between the battery pack 11a and the supporting member 11a helps to improve the space utilization of the battery pack 100 .
  • the battery cell 20 has a second outer surface m2 disposed opposite to the first outer surface m1, and the electrode terminal 21a is arranged on the second outer surface m2.
  • the second outer surface m2 is the outer surface of the battery cell 20 that is opposite to the first outer surface m1.
  • the second outer surface m2 is opposite to the bottom cover 12.
  • the battery cells 20 and the bottom cover 12 may be spaced apart.
  • there is a buffer space between the second outer surface m2 and the bottom cover 12 and the portion of the electrode terminal 21 a extending beyond the battery cell 20 is located in the buffer space. In this way, the wire harness and connecting piece connected to the electrode terminal 21 a can be arranged. within the buffer space.
  • the buffer space also has the above-mentioned ability to prevent the external force hitting the bottom cover 12 from acting on the battery cells 20 and damaging the battery cells 20 . Therefore, the buffer space can not only interrupt the influence of external forces, but also enable the layout of wiring harnesses, etc., killing two birds with one stone. In addition, the buffer space and the space utilization of the battery pack 100 are also improved.
  • the electrode terminal 21 a may also be arranged on the third outer surface of the battery cell 20 that intersects the first outer surface m1 .
  • the bearing member 11a is located on the top of the box 10 and is used to define the accommodation cavity s. Since the bottom cover 12 is located at the bottom of the box 10 , the bearing member 11 a is arranged opposite to the bottom cover 12 .
  • the bearing member 11a serves as the structure on the top of the box 10, and the box 10 can be installed on the installation body via the bearing member 11a.
  • the battery cells 20 arranged on the bearing member 11a can strengthen the strength of the bearing member 11a, thereby increasing the stiffness of the top of the battery pack 100. This can extend the application scenario of the battery pack 100 to scenarios where the top is stressed, such as Used as part of the vehicle 1000 chassis.
  • Figure 13 is a schematic structural diagram of the bearing member 11a in some embodiments of the present application.
  • Figure 14 is a schematic structural diagram of the bearing member 11a in other embodiments of the present application.
  • FIG. 15 is an orthographic view of the bearing member 11a shown in FIG. 14 in the vertical direction.
  • the bearing member 11a has a bearing surface f facing the accommodation cavity s, and the bearing surface f is configured as a plane.
  • the bearing surface f is the inner surface of the bearing member 11a facing the accommodation cavity s, and is used to define the accommodation cavity s.
  • the fact that the bearing surface f is configured as a plane means that in the arrangement direction of the main body 11 and the bottom cover 12 , the bearing surface f is a plane perpendicular to the arrangement direction.
  • the bearing surface f of the bearing member 11a is a plane parallel to the horizontal plane.
  • the bearing member 11a and the bottom cover 12 are arranged oppositely in the horizontal direction
  • the bearing surface f of the bearing member 11a is a plane parallel to the vertical surface.
  • the bearing member 11 a may be the entire inner surface of the bearing member 11 a facing the accommodation cavity s.
  • the bearing member 11 a may be in the shape of a flat plate.
  • the bearing member 11a can also be a part of the inner surface of the bearing member 11a facing the accommodation cavity s.
  • the bearing surface f is only the portion of the inner surface of the bearing member 11a used to define the accommodation cavity s. .
  • the bearing surface f When the bearing surface f is a plane, the bearing surface f can maintain a relatively equal distance from each battery cell 20 accommodated in the accommodation cavity s (this distance can be zero). When the distance between the bearing surface f and the battery cells 20 is kept relatively equal, more battery cells 20 can be accommodated in the accommodation cavity s. That is to say, the space utilization rate of the accommodation cavity s is higher, and the battery pack 100 can have With higher energy density, the battery pack 100 has higher endurance.
  • the battery cell 20 is disposed on the bearing surface f.
  • the battery cells 20 are mounted on the carrier 11a via the carrier surface f.
  • the battery cell 20 can be bonded to the load-bearing surface f, or can be fixedly connected to the load-bearing surface f via fasteners 13 or the like, or can be welded or clipped to the load-bearing surface f, and is not specifically limited.
  • the load-bearing surface f is a flat surface, the load-bearing surface f can have a larger contact area with the battery cells 20 installed on it, and the installation of the battery cells 20 is more stable. At the same time, when the load-bearing surface f is flat, compared with an uneven surface such as a curved surface, the load-bearing surface f can be connected to a larger number of battery cells 20 , which can increase the number of battery cells 20 installed in the battery pack 100 and thereby increase the number of battery cells 20 installed in the battery pack 100 . Space utilization and energy density of the battery pack 100.
  • the area N1 of the orthographic projection of the bearing surface f and the area N2 of the orthographic projection of the bearing member 11a satisfy: N1/N2 ⁇ 0.2. Further, N1/N2 ⁇ 0.5.
  • the bearing surface f is formed by the first bearing edge f1, the second bearing edge f2, the third bearing edge f3 and the fourth bearing edge f4 connected end to end.
  • the area N1 of the orthographic projection of the bearing surface f is the area bounded by the first bearing edge f1, the second bearing edge f2, the third bearing edge f3 and the fourth bearing edge f4.
  • the area N2 of the orthographic projection of the bearing member 11a is the area defined by the edge of the bearing member 11a.
  • the ratio between the area N1 of the orthographic projection of the bearing surface f and the area N2 of the orthographic projection of the bearing member 11a may be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1.
  • Table 4 shows the impact of the ratio of the area N1 of the orthographic projection of several groups of bearing surfaces f to the area N2 of the orthographic projection of the bearing member 11a on the cruising range of the battery pack 100 when tested according to the NEDC (New European Driving Cycle) standard.
  • N1/N2 is less than 0.2
  • the cruising range of the battery pack 100 is poor.
  • the reason is that when the load-bearing surface f is small, the number of battery cells 20 carried on the load-bearing member 11a is small, and the space utilization of the accommodation cavity s is low. Low, the energy density of the battery pack 100 is relatively low, resulting in a shorter cruising range of the battery pack 100 and poor test results.
  • the ratio of N1/N2 reaches 0.2 and above (especially when N1/N2 reaches 0.5 and above), the larger the ratio, the better the battery pack's 100-mile cruising range.
  • the reason is that the larger the load-bearing surface f, the greater the load on the battery pack.
  • the greater the number of battery cells 20 on the carrier 11a the higher the space utilization of the accommodation cavity s, and the higher the energy density of the battery pack 100. Therefore, the cruising range of the battery pack 100 is getting higher and higher, and the test structure is getting better and better.
  • the carrier 11a has a flat plate structure as shown in FIG. 13, the orthogonal projected area N1 of the carrier surface f is equal to the orthogonal projected area N2 of the carrier 11a, and the battery pack 100 has the best battery life.
  • the orthographic projection of the bearing surface f is rectangular.
  • the rectangular bearing surface f is an area enclosed by the first bearing edge f1 , the second bearing edge f2 , the third bearing edge f3 and the fourth bearing edge f4 .
  • the plurality of battery cells 20 are mostly assembled to form a rectangular structure.
  • the load-bearing surface f is constructed in a rectangular shape, which can adapt to the overall structure of the battery and facilitate the arrangement of more battery cells in the accommodation cavity s.
  • the body 20 improves the energy density of the battery pack 100.
  • the orthographic projection of the bearing surface f can also be in other shapes, such as circles, polygons, ellipses and other special shapes.
  • the bearing part 11a has a bearing part 11a1 and a connecting part 11a2.
  • the connecting part 11a2 is enclosed and connected to the edge of the bearing part 11a1.
  • the bearing part 11a1 is used to define the accommodation cavity s, and the connecting part 11a2 is connected to In the part of the box 10 except the bearing member 11a.
  • the bearing part 11a1 is used to define the accommodation cavity s, and the connection part 11a2 is used to connect with the part of the box 10 except the bearing member 11a, but does not participate in the definition of the accommodation cavity s.
  • the bearing portion 11a1 may be a plate-shaped or block-shaped member, or may be a flat plate-shaped or curved plate-shaped member, and is not specifically limited.
  • the connecting portion 11a2 surrounding the edge of the bearing portion 11a1 means that the connecting portion 11a2 is continuously connected end-to-end along the edge of the bearing portion 11a1 .
  • the connecting portion 11a2 when projected in the vertical direction, has a certain width, so that it can have an appropriate contact area with other structures of the box 10 except the bearing member 11a, and achieve a square edge between the connecting portion 11a2 and the box 10 Installation and connection of other structures except the bearing member 11a.
  • the carrying part 11a1 and the connecting part 11a2 may be integrally formed.
  • the bearing member 11a is made of metal (such as aluminum, iron, stainless steel, etc.)
  • the bearing portion 11a1 and the connecting portion 11a2 can be integrally formed by die casting, forging, hot pressing, cold pressing, etc.
  • the bearing member 11a is made of plastic material (such as PP, PE, ABS, etc.)
  • the bearing portion 11a1 and the connecting portion 11a2 can be integrally formed by injection molding.
  • the carrying part 11a1 and the connecting part 11a2 may also be formed separately and then connected together.
  • the carrying part 11a1 and the connecting part 11a2 are made of metal, the carrying part 11a1 and the connecting part 11a2 can be welded or bonded together.
  • the bearing part 11a1 and the connecting part 11a2 are made of plastic material, the cover part 12a and the mounting part 12b can be bonded together.
  • the carrying portion 11a1 and the connecting portion 11a2 can also be fixedly connected together by snapping, riveting or other methods.
  • the connecting portion 11a2 is connected to the part of the main body 11 except the bearing member 11a, and the connection method can be either integrally formed or fixedly connected.
  • the connecting portion 11a2 is integrally formed with the part of the main body 11 except the bearing member 11a, that is to say, the main body 11 is an integrally formed part, which can be integrally formed by die-casting, forging, hot pressing, cold pressing, injection molding, etc.
  • the connecting portion 11a2 is fixedly connected to the part of the main body 11 except the bearing member 11a, it can be fixedly connected through fasteners 13, snap-in connection with a snap-in structure, etc., and is not specifically limited.
  • the carrying part 11a1 and the connecting part 11a2 may be located on the same plane. Specifically, optionally, the two surfaces of the bearing portion 11a1 and the connecting portion 11a2 facing the bottom cover 12 are in the same plane, and/or the two surfaces of the bearing portion 11a1 and the connecting portion 11a2 facing away from the bottom cover 12 are in the same plane. When the two surfaces of the bearing portion 11a1 and the connecting portion 11a2 facing the bottom cover 12 and the two surfaces facing away from the bottom cover 12 are respectively on the same plane, the bearing portion 11a1 and the connecting portion 11a2 can form a flat plate-shaped bearing member. 11a (shown in Figure 13).
  • the carrying part 11a1 and the connecting part 11a2 may not be located on the same plane. Specifically, the bearing portion 11a1 protrudes away from the accommodation cavity s relative to the connecting portion 11a2, or the bearing portion 11a1 is recessed toward the accommodation cavity s relative to the connecting portion 11a2, which is not specifically limited.
  • the thicknesses of the bearing portion 11a1 and the connecting portion 11a2 may be equal or unequal, and are not specifically limited.
  • the bearing member 11a defines the accommodation cavity s through the bearing portion 11a1, and is structurally connected to the main body 11 except the bearing member 11a through the connecting portion 11a2, with a clear structure.
  • the carrying member 11a includes the above-mentioned carrying part 11a1 and the above-mentioned connecting part 11a2, the battery cell 20 is provided on the carrying part 11a1.
  • the bearing member 11a includes the above-mentioned bearing part 11a1 and the above-mentioned connecting part 11a2, the inner surface of the bearing part 11a1 facing the accommodation cavity s is configured to form a bearing surface f.
  • the bearing portion 11a1 protrudes in a direction away from the accommodation cavity s compared to the connecting portion 11a2.
  • the bearing portion 11a1 defines the accommodation cavity s.
  • the protrusion of the bearing portion 11a1 away from the accommodation cavity s means that the bearing portion 11a1 and the connecting portion 11a2 are staggered in the vertical direction.
  • the bearing portion 11a1 is located at the highest point of the bearing member 11a. At this time, a space that is a part of the accommodation cavity s can be formed between the carrying portion 11a1 and the connecting portion 11a2, and this space can accommodate the battery cells 20.
  • the bearing portion 11a1 When the bearing portion 11a1 protrudes away from the accommodation cavity s compared to the connecting portion 11a2, the bearing portion 11a1 can serve as a reinforcing structure of the bearing member 11a to improve the bending resistance of the bearing member 11a.
  • the thickness of the bearing portion 11a1 and the connecting portion 11a2 are equal.
  • the bearing part 11a1 and the connecting part 11a2 can be integrally formed by die casting, cold pressing, or hot pressing from the same plate, making the molding of the bearing part 11a more convenient.
  • the thickness of the bearing part 11a1 and the connecting part 11a2 is equal, and the stress is equalized everywhere during molding, which can improve the molding rate of the bearing part 11a.
  • the outer surface of the bearing portion 11a1 facing away from the accommodation cavity s is parallel to the bearing surface f.
  • the outer surface of the bearing portion 11a1 facing away from the accommodation cavity s is arranged opposite to the bearing surface f in the vertical direction.
  • the outer surface of the carrying portion 11a1 can be in contact with the atmospheric environment.
  • the main body 11 includes a frame 11b and a bearing member 11a.
  • the frame 11b is enclosed by a cavity q that is provided at both ends in the vertical direction.
  • the bottom cover 12 The bottom cover 12, the frame 11b and the carrying member 11a together form a receiving cavity s.
  • the frame 11b itself encloses a cavity q that runs through both ends in the vertical direction.
  • the carrier 11a covers the top of the cavity q
  • the bottom cover 12 covers the bottom of the cavity q. That is, the carrier 11a is located in the box.
  • the top of the body 10 is used to define the accommodation cavity s
  • the bottom cover 12 is located at the bottom of the box 10 and is used to define the accommodation cavity s.
  • the frame 11b, the bearing member 11a and the bottom cover 12 enclose a receiving cavity s.
  • the frame 11b, the bearing member 11a and the bottom cover 12 can be made of the same material, such as aluminum alloy, copper alloy, steel, plastic, etc.
  • the frame 11b, the supporting member 11a and the bottom cover 12 can also be made of different materials, and the details are not limited.
  • the frame 11b can be in the shape of a rectangle, a circle, a polygon, etc., and is not specifically limited.
  • the bearing part 11a includes the above-mentioned bearing part 11a1 and the connecting part 11a2
  • the bearing part 11a is connected to the frame 11b through the connecting part 11a2.
  • the bottom cover 12 includes the above-mentioned cover part 12a and the above-mentioned mounting part 12b
  • the bottom cover 12 is connected to the frame 11b via the mounting part 12b.
  • the receiving cavity s of the battery pack 100 can be formed by taking the frame 11b as the basis and connecting the supporting member 11a and the bottom cover 12 to both ends of the frame 11b in the vertical direction.
  • the structure of the box 10 is relatively simple.
  • the bearing member 11a and the frame 11b are fixedly connected or integrally formed.
  • the bearing member 11a and the frame 11b can be integrally formed by injection molding, die casting, forging, cold pressing, hot pressing, etc.
  • the carrier 11a and the frame 11b can be fixedly connected through fasteners 13, snap-in structure snap-in, welding, bonding, hot-melt connection, etc.
  • the main body 11 When the carrier 11a and the frame 11b are integrally formed, and the main body 11 is integrally formed, the main body 11 only needs to be connected to the bottom cover 12 to assemble the box 10, and the box 10 is easy to assemble.
  • the carrier 11a and the frame 11b are fixedly connected, the molding process of the carrier 11a and the frame 11b is easier, which can reduce the process cost of the box 10.
  • the bearing member 11a has the bearing portion 11a1 and the connecting portion 11a2, the connecting portion 11a2 is connected to the frame 11b.
  • the bottom cover 12 has the cover part 12a and the mounting part 12b, the mounting part 12b is connected to the frame 11b.
  • FIG. 16 is a front view of the battery pack 100 shown in FIG. 4 . Please refer to Figures 16 and 12.
  • the height Hc of the battery cell 20 and the height Hp of the battery pack 100 satisfy: 0.02 ⁇ Hc/Hp ⁇ 0.98.
  • the height Hc of the battery cell 20 refers to the maximum length of the battery cell 20 in the vertical direction when the main body 11 and the bottom cover 12 are arranged in the vertical direction.
  • the maximum length of the battery cell 20 refers to the distance between the electrode terminal 21a and The distance between the first outer surfaces m1.
  • the height Hc of the battery cell 20 refers to the distance from the first outer surface m1 of the battery cell 20 to the opposite surface thereof. Set the distance between outer surfaces.
  • the height Hp of the battery pack 100 refers to the maximum length of the battery pack 100 in the vertical direction when the main body 11 and the bottom cover 12 are arranged in the vertical direction.
  • the ratio of the height Hc of the battery cell 20 to the height Hp of the battery pack 100 may be 0.02, 0.03, 0.05, 0.08, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6 , 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 0.98.
  • Table 5 shows the ratio of the height Hc of several groups of battery cells 20 to the height Hp of the battery pack 100 tested according to the standards of GB 38031-2020 "Safety Requirements for Power Batteries for Electric Vehicles" on the safety of the battery pack 100 Impact. It can be seen from Table 5 that when Hc/Hp exceeds 0.98, the structure of the box 10 occupies a very small height of the battery pack 100, and the strength of the box 10 cannot meet the requirements, and safety accidents such as fire and explosion may occur. When 0.02 ⁇ Hc/Hp, the structural strength of the box 10 can meet the requirements, and fire and explosion will not occur. When Hc/Hp is less than 0.2, although the structural strength of the box 10 can meet the requirements, the space utilization rate of the battery pack 100 is low and the energy density is too low.
  • the battery pack 100 includes a box 10 and a battery cell 20.
  • the box 10 is enclosed with a receiving cavity s.
  • the box 10 includes a bottom cover 12 located at the bottom of itself and used to define the receiving cavity s.
  • the battery cells 20 are accommodated in the accommodation chamber s, wherein the bottom cover 12 has a characteristic surface d facing the accommodation chamber s, the characteristic surface d being configured as a plane.
  • the characteristic surface d is a plane, the characteristic surface d can maintain a relatively equal distance from each battery cell 20 accommodated in the accommodation cavity s (this distance can be zero).
  • the accommodation cavity s can accommodate more battery cells 20 , that is, the space utilization rate of the accommodation cavity s is higher, and the battery pack 100 can have a higher Energy density, battery pack 100 has higher endurance.
  • the electrical device includes the battery pack 100 provided in any of the above embodiments, and the battery pack 100 is used to provide electrical energy to the electrical device.
  • the battery pack 100 is used to provide electrical energy to the electrical device.
  • the electrical device includes the above-mentioned battery pack 100, it has all the beneficial effects in the above-mentioned embodiments, which will not be described again here.
  • FIG. 17 is a schematic diagram of the battery pack 100 applied to the vehicle body 200 in some embodiments of the present application.
  • FIG. 18 is a first exploded state diagram of the structure shown in FIG. 17 .
  • FIG. 19 is a second exploded state diagram of the structure shown in FIG. 17 .
  • the electrical device includes a vehicle 1000 , and the battery pack 100 is disposed at the bottom of the body 200 of the vehicle 1000 .
  • the battery pack 100 is disposed at the bottom of the body 200 of the vehicle 1000 .
  • the body 200 of the vehicle 1000 refers to the part of the vehicle 1000 used for carrying people and loading cargo, including the cockpit, passenger compartment, engine compartment, luggage compartment, etc.
  • the vehicle body 200 generally includes a vehicle body 200 shell 22 and doors, windows, decorative parts, seats, air conditioning devices, etc. provided on the vehicle body 200 shell 22 .
  • the body 200 shell 22 generally refers to the structure composed of the vehicle 1000's longitudinal beams, cross beams, chassis, pillars and other main load-bearing components, as well as the sheet metal parts connected to them.
  • the battery pack 100 being disposed at the bottom of the vehicle body 200 mainly means that the battery pack 100 is disposed at the bottom of the housing 22 of the vehicle body 200 .
  • arranging the battery pack 100 at the bottom of the vehicle body 200 does not occupy the space inside the vehicle body 200 and helps reduce the volume and weight of the vehicle body 200 .
  • Figure 20 is a schematic diagram of the installation relationship between the battery pack 100 and the vehicle body 200 in some embodiments of the present application.
  • the main body 11 includes a bearing member 11a located on the top of the box 10.
  • the bearing member 11a is used to define the accommodation cavity s. In the vertical direction, the distance L between the bearing member 11a and the vehicle body 200 satisfies: L ⁇ 0.
  • the distance L between the carrier 11a and the vehicle body 200 refers to the distance in the vertical direction between the highest point of the carrier 11a and the vehicle body 200 located above it.
  • the bearing part 11a includes the above-mentioned bearing part 11a1 and the above-mentioned connecting part 11a2
  • the distance L between the bearing part 11a and the vehicle body 200 is the distance between the outer surface of the bearing part 11a1 away from the accommodation cavity s and the vehicle body 200 located above it.
  • the carrier 11a When the distance L between the carrier 11a and the vehicle body 200 is equal to 0, the carrier 11a is attached to the vehicle body 200. When the distance L between the carrier 11a and the vehicle body 200 is greater than 0, the carrier 11a is spaced apart from the vehicle body 200 and does not adhere to the vehicle body 200. It can be understood that at this time, the bottom cover 12 is at the bottom of the bearing member 11a, and the distance g between the bottom cover 12 and the vehicle body 200 is greater than 0.
  • the range within the distance from the bottom of the battery pack 100 to the vehicle body 200 is the installation space occupied by the battery pack 100.
  • the carrier 11a is spaced apart from the vehicle body 200, there will be a certain amount of waste space between the battery pack 100 and the vehicle body 200. If the carrier 11a is attached to the vehicle body 200, the waste space existing between the battery pack 100 and the vehicle body 200 can be eliminated.
  • the space is divided into the space range of the battery pack 100, so that when the same space is occupied under the body 200, the fit of the battery pack 100 and the body 200 can increase the volume of the battery pack 100, thereby increasing the power and energy of the battery pack 100. density.
  • the battery pack 100 can have a larger amount of electricity and a higher energy density, and the vehicle 1000 has a stronger endurance.
  • the distance L between the bearing member 11a and the vehicle body 200 is greater than zero, the installation of the bearing member 11a is more flexible.
  • the main body 11 includes a bearing member 11 a located on the top of the box 10 .
  • the bearing member 11 a is used to define the accommodation cavity s.
  • the battery pack 100 is installed on the vehicle body 200 via the bearing member 11 a.
  • the carrier 11a in the battery pack 100 is closest to the vehicle body 200.
  • the battery pack 100 is installed on the vehicle body 200 via the carrier 11a. Specifically, it may be a carrier
  • the component 11a is fixed to the vehicle body 200 through fasteners 13 (such as screws, bolts, rivets, etc.), welding, etc.
  • the structure formed by the battery cells 20 and the carrier 11a is connected to the vehicle body 200, which can improve the top strength of the battery pack 100 and thereby improve the installation strength of the battery pack 100.
  • the carrier 11 a is configured to form at least a portion of the chassis of the vehicle body 200 .
  • the chassis is a combination of four parts: the transmission system, the driving system, the steering system and the braking system. It is used to support and install the engine of the vehicle 1000 and its components and assemblies, forming the overall shape of the vehicle 1000 and bearing Engine power ensures normal driving.
  • the chassis is located at the bottom of the vehicle body 200, and the bearing member 11a directly serves as at least a part of the chassis. That is, the carrier 11a is used to form at least a part of the chassis of the vehicle body 200. In this way, the carrier 11a is integrated with the chassis of the vehicle body 200, so that the space occupied by the gap between the traditional chassis and the battery pack 100 can be divided into the space in the battery pack 100 to increase the battery pack 100, which is helpful. Increasing the energy of the battery pack 100 can thereby increase the endurance of the vehicle 1000 .
  • the electrical device includes a vehicle 1000 , and a battery pack 100 is provided at the bottom of the body 200 of the vehicle 1000 .
  • the battery pack 100 includes a box 10 and a battery cell 20.
  • the box 10 includes a carrier 11a at the top.
  • the battery cell 20 is located in the box 10 and suspended on the carrier 11a, and the electrodes of the battery cell 20
  • the terminals 21a are located on the outer surface of the battery cells 20 facing away from the carrier 11a, which forms at least part of the chassis of the vehicle 1000.
  • the battery cell 20 is suspended on the carrier 11a, which can increase the strength of the carrier 11a and thereby increase the strength of the top of the battery cell 20, so that the carrier 11a can meet certain force requirements when used as a chassis.
  • the electrode terminal 21a of the battery cell 20 is away from the carrier 11a, and the battery cell 20 can be directly installed on the carrier 11a, eliminating the gap between the battery cell 20 and the carrier 11a, and using the saved gap.

Landscapes

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

Abstract

本申请涉及一种电池包(100)及用电装置，包括箱体(10)及电池单体(20)，箱体(10)围合形成有容纳腔(s)，箱体(10)包括位于自身底部并用于界定容纳腔(s)的底盖(12)，电池单体(20)容纳于容纳腔内，其中，底盖(12s)具有面向容纳腔(s)的特征面(d)，特征面(d)被构造为平面。

Description

电池包及用电装置 技术领域
本申请涉及电池技术领域，特别是涉及电池包及用电装置。
背景技术
随着新能源技术的日益成熟，新能源汽车也逐渐进入大众视野。新能源汽车的主要核心技术在于电池包，电池包的安全、稳定性直接决定整车性能。
电池包的续航能力一直是新能源汽车领域关注的焦点，目前电池包的续航能力普遍不高，提高电池包的续航能力是亟待解决的问题。
发明内容
鉴于此，本申请提供了一种电池包及用电装置。
第一方面，本申请提供了一种电池包，包括箱体及电池单体，箱体围合形成有容纳腔，箱体包括位于自身底部并用于界定容纳腔的底盖，电池单体容纳于容纳腔内，其中，底盖具有面向容纳腔的特征面，特征面被构造为平面。
在本申请的方案中，当特征面为平面，特征面可以与容纳于容纳腔内的各个电池单体之间保持较为均等的距离(此距离可以为零)。当特征面与电池单体之间的距离保持较为均等时，容纳腔能够容纳更多的电池单体，即容纳腔的空间利用率更高，电池包能够拥有更高的能量密度，电池包的续航能力更高。
在一些实施例中，所述特征面的正投影的面积S1与所述底盖的正投影的面积S2满足：S1/S2≥0.2。此时，电池包的能量密度高且续航能力好。
在一些实施例中，在竖直方向，所述特征面的正投影呈矩形。此时，可以在容纳腔内布置更多的电池单体，提高电池包的能量密度。
在一些实施例中，所述底盖具有盖部及安装部，所述安装部围合连接于所述盖部的边缘，所述盖部用于界定所述容纳腔，所述安装部安装于所述箱体除所述底盖之外的部分。所述盖部面向所述容纳腔的内表面构造形成所述特征面。此时，底盖经由盖部界定容纳腔，并经由安装部实现与主体连接，结构分明，方便安装。
在一些实施例中，所述盖部背离所述容纳腔的外表面与所述特征面相平行。此时，盖部的外表面呈平面可以大大减小电池包所产生的风阻，有助于降低车辆的行驶阻力，降低车辆行驶能耗，提高电池包的续航能力。
在一些实施例中，盖部相较于安装部沿背离容纳腔的方向突出设置。此时，盖部相对安 装部突出，底盖的盖部可以作为底盖的加强结构，提高底盖的抗弯性能。
在一些实施例中，所述盖部与所述安装部的厚度相等。此时，底盖的结构更加简单、加工更加方便。
在一些实施例中，底盖与电池单体间隔设置。此时，可以避免作用于底盖的外力传递到电池单体上而损害电池单体，特别是当电池包安装于车辆底部且底盖处于电池包最低处时，车辆行驶过程中地面上的石子等容易飞射到电池包的底部击打底盖，此时缓冲空间可中断外力传递到电池单体对电池单体造成影响。
在一些实施例中，箱体还包括位于自身顶部的承载件，承载件用于界定容纳腔，电池单体悬吊于承载件。此时，电池单体悬吊在承载件的下方，底盖位于箱体的底部，在对电池包的内部进行维修时，拆卸底盖即可暴露电池单体而无需拆出承载件；同时，在维修电池包时，可以将电池单体从下方拆装于承载件上，特别是承载件作为车辆底盘的至少一部分而受力时，仅需从承载件下方拆装电池单体而不需拆除承载件，方便实现电池包的维修。而且，悬吊在承载件上的电池单体，能够加强承载件的强度，进而提高电池包顶部的刚度。
在一些实施例中，电池单体面向承载件的外表面为第一外表面，电池单体包括电极端子，电极端子布置于电池单体除第一外表面之外的外表面。此时，电极端子位于电池单体除第一外表面之外的外表面上，连接各电极端子的各种部件(如采样线束、高压线束、防护结构等)可以通过电池单体与底盖之间的空间和/或电池单体与主体内侧面之间的空间来进行布置，更加方便各部件的布置。而且，此时通过未设置电极端子的第一外表面与承载件连接，能够实现电池单体与承载件贴合，可节省电池单体与承载件之间的空间，提高电池包的空间利用率。
在一些实施例中，电池单体具有与第一外表面相背设置的第二外表面，电极端子布置于第二外表面。此时，第二外表面与底盖之间具有缓冲空间，且电极端子伸出电池单体之外的部分位于该缓冲空间内，如此与电极端子连接的线束和连接片可以布置在缓冲空间内。同时，缓冲空间还能够阻断击打于底盖的外力作用到电池单体而损伤电池单体。因此，缓冲空间不仅能够中断外力影响，还能够进行线束等的布局，一举两得。
在一些实施例中，电池单体与承载件粘接。此时，电池单体与承载件之间不仅连接方便，而且可简化电池包的结构。
在一些实施例中，主体包括边框和承载件，边框围合形成有在竖直方向的两端贯通设置的空腔，底盖和承载件分别盖合于空腔在竖直方向的相背两端，底盖、边框和承载件共同围合形成容纳腔。此时，以边框为基础，并将承载件和底盖分别连接在边框的竖直方向的两端后即可形成电池包的容纳腔，箱体结构较为简单。
在一些实施例中，承载件与边框固定连接或一体成型。当承载件与边框一体成型，主体一体成型，主体只需与底盖连接即可实现箱体的组装，箱体组装方便。当承载件与边框固定连接，承载件与边框的成型工艺较为容易，可降低箱体的工艺成本。
第二方面，本申请还提供了一种用电装置，包括上述电池包，电池包用于为用电装置提供电能。
在一些实施例中，用电装置包括车辆，电池包设置于车辆车身的底部。此时，将电池包设置在车身的底部，不会占用车身内部的空间，有助于降低车身体积和重量。
在一些实施例中，主体包括位于箱体顶部的承载件，承载件用于界定容纳腔，电池包经由承载件安装于车身。当电池单体设置在承载件上时，电池单体与承载件形成的结构与车身连接，可以提高电池包的顶部强度，进而提高电池包的安装强度。
在一些实施例中，承载件被配置为形成车身底盘的至少一部分。此时，可将传统底盘与电池包之间的间隙所占用的空间划分到电池包内用来提高电池包的空间，如此有助于提高电池包的能量，进而能够提高车辆的续航能力。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其他特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
通过阅读对下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在全部附图中，用相同的附图标号表示相同的部件。在附图中：
图1为本申请一些实施例提供的车辆的结构示意图；
图2为本申请一些实施例提供的电池单体的结构示意图；
图3为本申请一些实施例提供的电池包的结构示意图；
图4为图3所示的电池包的结构分解图；
图5为本申请一些实施例中提供的底盖的结构示意图；
图6为图5所述的底盖的俯视图；
图7为图5所示的底盖的主视图；
图8为本申请另一些实施例中提供的底盖的结构示意图；
图9为图4所示的电池包的剖视图；
图10为图6所示的底盖在竖直方向的正投影示意图；
图11为本申请一些实施例中的电池单体的外形示意图；
图12为图11所示的电池单体的主视图；
图13为本申请一些实施例中的承载件的结构示意图；
图14为本申请另一些实施例中的承载件的结构示意图；
图15为图14所示的承载件在竖直方向的正投影图；
图16为图4所示的电池包的主视图；
图17为本申请的一些实施例中电池包应用于车身的示意图；
图18为图17所示结构的第一分解状态图；
图19为图17所示结构的第二分解状态图；
图20为本申请的一些实施例中电池包与车身的安装关系示意图。
1000、车辆；100、电池包；200、车身；10、箱体；11、主体；11a、承载件；11a1、承载部；11a2、连接部；11b、边框；12、底盖；12a、盖部；12b、安装部；12c、固定孔；13、紧固件；s、容纳腔；q、空腔；f、承载面；f1、第一承载边；f2、第二承载边；f3、第三承载边；f4、第四承载边；d、特征面；d1、第一特征边；d2、第二特征边；d3、第三特征边；d4、第四特征边；20、电池单体；21、端盖；21a、电极端子；22、壳体；23、电极组件；m1、第一外表面；m2、第二外表面；m3、第三外表面。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的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 便于描述本申请实施例和简化描述，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实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，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，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
目前，从市场形势的发展来看，电池包的应用越加广泛。电池包不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着电池包应用领域的不断扩大，其市场的需求量也在不断地扩增。
本发明人注意到，现有电池包箱体的底盖通常是朝外凸出设置，其目的是为了避免击打在底盖的外力通过底盖传递到电池单体上，如此底盖凸出所占的空间降低了电池包的空间利用率，进而使得电池包的能量密度降低，不利于提高电池包的续航能力。
为了提高电池包的续航能力，申请人研究发现，可以将底盖设计呈平板状，降低底盖本身对容纳腔的占用，尽可能多把空间用于安装电池单体，以提高电池包的能量密度和续航能力。
基于以上考虑，为了提高电池包的安全性和使用寿命问题，本发明人经过深入研究，设计了一种电池包，电池包包括箱体及电池单体，箱体围合形成有容纳腔，箱体包括位于自身底部并用于界定容纳腔的底盖，电池单体容纳于容纳腔内，其中，底盖具有面向容纳腔的特征面，特征面被构造为平面。当特征面为平面，特征面可以与容纳于容纳腔内的各个电池单体之间保持较为均等的距离(此距离可以为零)。当特征面与电池单体之间的距离保持较为均等时，容纳腔能够容纳更多的电池单体，即容纳腔的空间利用率更高，电池包能够拥有更高的能量密度，电池包的续航能力更高。
本申请实施例公开的电池包可以但不限用于车辆、船舶或飞行器等用电装置中。可以使用具备本申请公开的电池包组成该用电装置的电源系统。本申请中涉及的安装体是用电装置中用于安装电池包的结构。
本申请实施例提供一种使用电池包作为电源的用电装置，用电装置可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，电动玩具可以包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以下实施例为了方便说明，以本申请一实施例的一种用电装置为车辆1000为例进行说 明。
请参照图1，图1为本申请一些实施例提供的车辆1000的结构示意图。车辆1000可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池包100，电池包100可以设置在车辆1000的底部或头部或尾部。电池包100可以用于车辆1000的供电，例如，电池包100可以作为车辆1000的操作电源。车辆1000还可以包括控制器和马达，控制器用来控制电池包100为马达供电，例如，用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池包100不仅可以作为车辆1000的操作电源，还可以作为车辆1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参照图2，图2为本申请一些实施例提供的车辆1000的结构示意图。电池单体20是指组成电池包100的最小单元。如图2所示，电池单体20包括有端盖21、壳体22、电极组件23以及其他的功能性部件。
端盖21是指盖合于壳体22的开口处以将电池单体20的内部环境隔绝于外部环境的部件。不限地，端盖21的形状可以与壳体22的形状相适应以配合壳体22。可选地，端盖21可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖21在受挤压碰撞时就不易发生形变，使电池单体20能够具备更高的结构强度，安全性也可以有所提高。端盖21上可以设置有如电极端子21a等的功能性部件。电极端子21a可以用于与电极组件23电连接，以用于输出或输入电池单体20的电能。在一些实施例中，端盖21上还可以设置有用于在电池单体20的内部压力或温度达到阈值时泄放内部压力的泄压机构。端盖21的材质也可以是多种的，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。在一些实施例中，在端盖21的内侧还可以设置有绝缘件，绝缘件可以用于隔离壳体22内的电连接部11a2件与端盖21，以降低短路的风险。示例性的，绝缘件可以是塑料、橡胶等。
壳体22是用于配合端盖21以形成电池单体20的内部环境的组件，其中，形成的内部环境可以用于容纳电极组件23、电解液以及其他部件。壳体22和端盖21可以是独立的部件，可以于壳体22上设置开口，通过在开口处使端盖21盖合开口以形成电池单体20的内部环境。不限地，也可以使端盖21和壳体22一体化，具体地，端盖21和壳体22可以在其他部件入壳前先形成一个共同的连接面，当需要封装壳体22的内部时，再使端盖21盖合壳体22。壳体22可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体22的形状可以根据电极组件23的具体形状和尺寸大小来确定。壳体22的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
电极组件23是电池单体20中发生电化学反应的部件。壳体22内可以包含一个或更多个电极组件23。电极组件23主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片 与负极片之间设有隔膜。正极片和负极片具有活性物质的部分构成电极组件23的主体11部，正极片和负极片不具有活性物质的部分各自构成。正极极耳和负极极耳可以共同位于主体11部的一端或是分别位于主体11部的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳连接电极端子21a以形成电流回路。
图3为本申请一些实施例提供的电池包100的结构示意图，图4为图3所示的电池包100的结构分解图。根据本申请的一些实施例，请参照图3和图4，本申请实施例提供了一种电池包100，包括电池单体20及箱体10，箱体10形成有容纳腔s，电池单体20容纳于容纳腔s内。
在电池包100中，电池单体20可以是多个，多个电池单体20之间可串联或并联或混联，混联是指多个电池单体20中既有串联又有并联。多个电池单体20之间可直接串联或并联或混联在一起，再将多个电池单体20构成的整体容纳于箱体10内；当然，电池包100也可以是多个电池单体20先串联或并联或混联组成电池模块形式，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体10内。电池包100还可以包括其他结构，例如，该电池包100还可以包括汇流部件，用于实现多个电池单体20之间的电连接。其中，每个电池单体20可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体20可呈圆柱体、扁平体、长方体或其它形状等。
箱体10可以是多种形状，比如圆柱体、长方体等，箱体10的具体构造可以采取多种结构方式。
在一些实施例中，请继续参照图3及图4，箱体10包括主体11及设置于主体11底部的底盖12，底盖12与主体11共同围合形成容纳电池单体20的容纳腔s。
主体11可以是一体成型的结构，也可以由多个零部件装配形成。主体11可以是空心状的壳体22结构，其自身界定有第一空间，第一空间的底部敞开，底盖12盖合在第一空间的敞开处。底盖12可以呈一侧开口的空心结构，自身可以具备第二空间，底盖12所具备的第二空间与主体11所具备的第一空间整体形成容纳腔s。底盖12自身可以不具备形成容纳腔s的空间，当底盖12盖设在主体11所具备第一空间的敞开处时，底盖12密封主体11所具备的第一空间且两者围合形成与第一空间等同的容纳腔s，此时底盖12可以呈平板状结构。当然，箱体10的容纳腔s也可以是主体11所具备的第一空间的部分所形成，此时可以是底盖12盖合在第一空间的敞开处并向第一空间凹陷并占用第一空间的部分空间，第一空间除去被底盖12所占用的部分空间形成箱体10的容纳腔s。
可理解地，此时底盖12位于箱体10的底部，并用于与主体11一起界定容纳腔s。具体地，底盖12可以但不限于是板状结构、块状结构等等，可以是平板状、弯板状等，具体不限定。
电池单体20位于容纳腔s时，电池单体20可以设置于底盖12和/或主体11上。
当主体11由多个零部件装配形成时，电池单体20可以设置于其中一个零部件上，也可以设置于全部零部件上。在一实施例中，主体11可以包括顶盖(未图示)、围板(未图示)和支撑板(未图示)，围板围合形成有在竖直方向的两端开口的第三空间，顶盖和底盖12分别密封盖合在第三空间在竖直方向的两端，顶盖、围板及底盖12共同围合形成容纳腔s，支撑板位于第三空间内，电池单体20支撑在支撑板上。在其他实施例中，主体11可以包括下文描述的承载件11a和边框11b，具体详见下文。
底盖12与主体11之间可以通过焊接、热熔连接、粘接、紧固连接、卡接等方式实现两者固定。其中，紧固连接是指通过紧固件13实现连接，紧固件13包括螺栓、插销、铆钉、销钉、螺钉等构件。其中，卡接是指通过卡合结构实现固定，例如底盖12上具有卡钩，主体11上具有卡口，卡钩卡合在卡口内时可实现底盖12与主体11的卡合固定。当然，底盖12与主体11的连接方式不限于此，在本申请中不进行穷举。
在一些实施例中，底盖12与主体11密封连接并共同形成封闭的容纳腔s。
底盖12与主体11密封连接的方式有多种，可以但不限于是：在底盖12与主体11之间设置密封件，通过密封件密封连接底盖12与主体11；底盖12与主体11之间通过密封胶密封连接；底盖12与主体11之间相互插接通过插接面构成的阻挡结构密封连接。
此时，电池包100的箱体10通过自身的底盖12与自身的主体11围合形成密封的容纳腔s，不需要在箱体10内额外设置其他密封结构，可简化电池包100的结构，降低电池包100的成本，并保证电池包100的安全性和使用寿命。
在本申请的描述中，电池包100的底盖12位于主体11的底部即在图3和图4所指上下方位中底盖12位于主体11的底部。在实际使用情况下，图3和图4所示的上下方位可以但不限于为竖直方向，根据电池包100的实际安装情况而定。需要指出的是，在本申请的下述描述中，以竖直方向为参考对电池包100各结构的位置关系、尺寸等进行描述，并不是对电池包100结使用方式的限制，仅是为了更加清楚明了的对方案进行阐述和说明。
在一些实施例中，底盖12经由密封件与主体11密封连接。
密封件是指能够防止流体或固体微粒等从相邻结合面间泄漏的零部件，可以防止外界杂质如灰尘与水分等侵入到电池包100内。密封件密封连接主体11和底盖12是指密封件连接在主体11与底盖12相对的两个表面之间，并与该两个表面之间具有圈形的接触界面，能够防止外界的水分经自身与两个表面的接触截面进入到电池包100内部，进而起到密封效果。
密封件可选为密封圈、密封垫。具体地，密封件可选为橡胶、硅胶等材料制成。具体地，密封件可选为O形密封件、方形密封件、异形密封件等。密封件的具体形状可以与底盖12及主体11的相对的两个表面的形状相适配。例如底盖12及主体11的相对的两个表面为环形面时密封件可以为O形密封件。
此时，底盖12通过密封件与主体11实现密封连接，密封可靠且成本较低。
需要说明地，底盖12通过密封件实现与主体11的密封后，还可以通过其他方式与主体11之间固定连接。其他方式包括但不限于卡接、插接、螺纹件连接、铆接、焊接、粘接等。可理解地，当底盖12通过密封胶与主体11密封时，根据密封胶的粘接性，当密封胶的粘接性能好满足要求(即底盖12与主体11之间固定且不分离)时也可以不采取其他方式对两者进行固定连接。
在一些实施例中，底盖12可拆卸地连接于主体11的底部。
底盖12与主体11可拆卸连接是指底盖12与主体11连接时底盖12相对主体11具有与主体11完全连接并形成容纳腔s的第一状态以及具有与主体11不完全连接或分离能够暴露电池单体20开放的第二状态，底盖12在外力操作下可从第一状态切换至第二状态，并可从第二状态切换至第一状态，在此过程中不损坏任何零件。
底盖12相对主体11具有与主体11不完全连接并使得容纳腔s开放的第二状态时，底盖12与主体11的安装方式可以是：底盖12与主体11可转动的连接且可经由紧固件13或者卡合方式实现固定连接。当底盖12相对主体11转动至闭合容纳腔s时，底盖12与主体11可通过紧固件13或者卡合方式与主体11固定连接，电池单体20容纳在容纳腔s内而不可视，此时底盖12处于第一状态。当拆下紧固件13或者解除卡合连接时，底盖12能够相对主体11转动至开放容纳腔s并暴露电池单体20的位置，此时底盖12处于第二状态。其中，底盖12与主体11可转动的连接可以但不限于是底盖12与主体11通过转轴可转动连接。
底盖12相对主体11具有与主体11分离并使得容纳腔s开放的第二状态时，底盖12与主体11的安装方式可以是：底盖12与主体11仅经由紧固件13或者卡合方式实现固定连接。当将紧固件13安装于底盖12与主体11上或者将底盖12与主体11的卡合结构卡合，底盖12与主体11实现完全固定并共同形成容纳腔s，电池单体20容纳在容纳腔s内而不可视，此时底盖12处于第一状态。当拆下紧固件13或者解除全部卡合连接，底盖12可以从主体11上分离下来，进而暴露电池单体20，此时底盖12处于第二状态。
底盖12处于第一状态时与主体11形成容纳腔s可对电池单体20形成保护。底盖12处于第二状态时电池包100体被暴露，如此可以方便相关人员对电池单体20进行维护或更换。
在一些实施例中，请参照图4，底盖12与主体11经由紧固件13可拆卸连接。
紧固件13是指能够将两个或两个以上零件(或构件)紧固连接成为一件整体的构件，可以但不限于是：螺钉、螺栓、铆钉、插销、销轴、焊钉等等。
此时，底盖12与主体11经由紧固件13可拆卸连接，不仅方便拆装，而且结构简单、经济实惠。
图5为本申请一些实施例中提供的底盖12的结构示意图，图6为图5所述的底盖12的俯视图，图7为图5所示的底盖12的主视图。图8为本申请另一些实施例中提供的底盖12的结构示意图。
在一些实施例中，底盖12的最小厚度h满足：0.2mm＜h＜20mm。
底盖12的厚度是指在竖直方向的截面上底盖12竖直方向的两侧表面之间的距离。底盖12的最小厚度h即为底盖12竖直方向的两侧面之间的最短距离。当底盖12各处厚度均匀时，底盖12可以呈平板状(如图8所示)，底盖12的最小厚度即为底盖12各处所具备的相等的厚度。当底盖12厚度不均匀时，则底盖12的最小厚度即为底盖12最薄处的厚度。
具体地，底盖12的最小厚度h可选为0.3mm、0.5mm、0.8mm、1mm、1.5mm、1.8mm、2mm、2.5mm、2.8mm、3mm、3.5mm、3.8mm、4mm、4.5mm、4.7mm、5mm、5.5mm、5.8mm、6mm、6.5mm、7mm、7.5mm、8mm、8.5mm、9mm、9.5mm、10mm、10.5mm、11mm、11.5mm、12mm、12.5mm、13mm、13.5mm、14mm、14.5mm、15mm、16mm、16.5mm、17mm、17.5mm、18mm、18.5mm、19mm、19.5mm等。优选地，0.5mm≤h≤3mm。
此时，经证明，当底盖12的最小厚度h满足0.2mm＜h＜20mm时，能够有效的降低电池包100的重量，且强度结构合理。
需要说明的是，在本申请的描述中，以竖直方向为参考，某一结构的“厚度”是指在竖直方向的截面上该结构竖直方向的两侧表面之间的距离，在下述描述中并不对“厚度”进行过多解释，可参照此处的描述。当然，可理解地，竖直方向仅是为了更加方便的说明本申请的方案，并不是对电池包100使用方式的限制。
在一些实施例中，电池单体20的重量m与底盖12的最小壁厚h满足：0.03mm/Kg≤h/m≤100mm/Kg。
电池单体20的重量m是指单个电池单体20的重量m。当电池包100包括多个电池单体20时，电池单体20的重量即为各个电池单体20的重量。
具体地，底盖12的最小壁厚h与电池单体20的重量m的比值可选为0.04mm/Kg、0.05mm/Kg、0.1mm/Kg、0.4mm/Kg、0.8mm/Kg、1mm/Kg、1.5mm/Kg、2mm/Kg、2.5mm/Kg、3mm/Kg、3.5mm/Kg、4mm/Kg、5mm/Kg、6mm/Kg、8mm/Kg、10mm/Kg、12mm/Kg、13mm/Kg、15mm/Kg、16mm/Kg、18mm/Kg、20mm/Kg、30mm/Kg、35mm/Kg、40mm/Kg、45mm/Kg、50mm/Kg、55/Kg、60mm/Kg、65mm/Kg、68mm/Kg、70mm/Kg、75mm/Kg、80mm/Kg、85mm/Kg、90mm/Kg、95mm/Kg、98mm/Kg。
表1底盖12最小壁厚h与电池单体20重量m的比值对电池包100安全性能的影响
No. h(mm) m(Kg) h/m(mm/Kg) 测试结果
1 0.2 10 0.02 起火，爆炸
2 0.5 10 0.05 不起火，不爆炸
3 1.2 3 0.4 不起火，不爆炸
4 3 1 3 不起火，不爆炸
5 5 1.5 3.33 不起火，不爆炸
6 8 1.8 4.45 不起火，不爆炸
7 10 2 5 不起火，不爆炸
8 12 1.6 7.5 不起火，不爆炸
9 15 1.7 8.82 不起火，不爆炸
10 20 2 10 不起火，不爆炸
11 20 1 20 不起火，不爆炸
12 20 0.5 40 不起火，不爆炸
13 20 0.32 62.5 不起火，不爆炸
14 20 0.25 80 不起火，不爆炸
15 20 0.2 100 不起火，不爆炸
表1给出了按GB 38031-2020《电动汽车用动力蓄电池安全要求》的标准下进行测试时，几组底盖12的最小壁厚h、电池单体20的重量m的比值对电池包100安全性能影响的测试结果。由表1可知，当h/m等于0.02mm/Kg时，电池包100容易起火爆炸，究其原因是由于电池包100的结构强度无法满足要求。当h/M大于0.02mm/Kg时，底盖12结构强度较好，电池包100不容易起火和爆炸，但是h/m过大容易造成空间浪费及能量密度过低，因此h/m最好不超过100mm/Kg。
此时，经证明，当底盖12的最小厚度h与电池单体20的重量m满足0.03mm/Kg≤h/m≤100mm/Kg，电池包100不仅具有较好的结构强度，且能量密度较高，不容易起火爆炸。
在一些实施例中，请一并参照图5至图7，底盖12具有盖部12a及安装部12b，安装部12b围合连接于盖部12a的边缘，盖部12a用于界定容纳腔s，安装部12b连接主体11。
盖部12a用于界定容纳腔s是指盖部12a与主体11共同围合形成容纳腔s，安装部12b与主体11进行连接，而不参与容纳腔s的界定。盖部12a可以是板状、块状构件，可以是平板状、弯板状的构件，具体不限定。从图6可以看出，安装部12b围合在盖部12a的边缘是指安装部12b沿盖部12a的边缘连续设置呈首尾封闭连接的结构。可理解地，在竖直方向的投影，安装部12b具有一定宽度，如此可与主体11之间具有适当的接触面积，不仅方便安装部12b与主体11之间的定位和安装，还方便设置密封件，也有助于提高安装部12b与主体11的密封性。
盖部12a与安装部12b可以一体成型。当底盖12是金属材质(如铝、铁、不锈钢等)，盖部12a与安装部12b可以采用压铸、锻造、热压、冷压等方式一体成型。当底盖12是塑料材质(如PP、PE、ABS等)，盖部12a与安装部12b可以采用注塑一体成型。盖部12a与安装部12b也可以单独成型后连接在一起。当盖部12a与安装部12b为金属材质，盖部12a与安装部12b可以焊接、粘接在一起。当盖部12a与安装部12b为塑料材质，盖部12a与安装部12b可以粘接在一起。当然，盖部12a与安装部12b也可通过卡接、铆接等其他方式固定连接在一起。
盖部12a与安装部12b可以位于同一平面内。具体可选地，盖部12a与安装部12b均面向主体11的两个表面处于同一平面内，和/或盖部12a与安装部12b均背向主体11的两个表面处于同一平面。当盖部12a与安装部12b均面向主体11的两个表面以及均背向主体11的 两个表面均分别处于同一平面时，盖部12a与安装部12b可以形成一平板状的底盖12(如图8所示)。
盖部12a与安装部12b也可以不位于同一平面内。具体地，盖部12a相对安装部12b朝主体11凹陷，或者盖部12a相对安装部12b背向主体11凸出，具体不限定。盖部12a与安装部12b的厚度可以相等，也可以不等，具体不限定。
此时，底盖12经由盖部12a界定容纳腔s，并经由安装部12b实现与主体11连接，结构分明，方便安装。
可理解地，当底盖12与主体11密封连接时，底盖12经由安装部12b与主体11密封连接，即安装部12b与主体11密封连接。安装部12b与主体11之间的密封连接方式可以是密封件密封连接、密封胶密封连接等，具体不穷举。密封件可以是上述描述中提及的密封件，密封件的设置方式可以参考上述记载，不同之处在于密封件设置在安装部12b与主体11之间。当安装部12b与主体11之间采用密封胶密封连接时，密封胶可以涂覆在安装部12b与主体11相接触的全部表面上。
可理解地，当底盖12与主体11可拆卸连接时，底盖12经由安装部12b与主体11可拆卸连接，即安装部12b与主体11可拆卸连接。安装部12b与主体11可拆卸连接的方式，可以参照上述描述中记载的底盖12与主体11的可拆卸方式，只需将底盖12中与主体11可拆卸连接的部位设置为安装部12b即可，因此对于安装部12b与主体11的可拆卸连接方式在此不进行赘述。
在一些实施例中，当安装部12b与主体11可拆卸连接。
具体地，底盖12还包括设置于安装部12b上的固定孔12c，紧固件13穿设安装部12b上的固定孔12c后紧固在主体11上。固定孔12c是在竖直方向贯通安装部12b的通孔，具体地，固定孔12c可以是光滑的通孔(如紧固件13为铆钉时)、也可以是具有螺纹的通孔(如紧固件13为螺钉时)、或者其他方式的通孔(如六角孔、方形孔、腰型孔等)。固定孔12c的具体形式根据紧固件13的具体形式及具体设定方式而定，在此不赘述。
在一些实施例中，盖部12a与安装部12b的厚度相等。
当盖部12a与安装部12b一体成型，两者可以采取上述描述中记载的方式实现一体成型，如压铸一体成型、冷压一体成型、热压一体成型、注塑一体成型等，在此不赘述。由于盖部12a与安装部12b的厚度相等，在成型时可以基于同一金属板通过冲压、切割等方式快速加工而出。
此时，盖部12a与安装部12b的厚度相等，在成型时各处应力均等，可提高一体成型的成型率，也可采取简单的诸如板材切割等方式快速加工而出，底盖12的结构更加简单、加工更加方便。
在一些实施例中，请参照图7，盖部12a相较于安装部12b沿背离容纳腔s的方向突出 设置。
由上文可知，盖部12a界定容纳腔s，盖部12a背离容纳腔s突出是指盖部12a背离主体11突出。也就是说，盖部12a与安装部12b在竖直方向的错开布置，盖部12a处于底盖12的最低处。
当盖部12a相较于安装部12b背离容纳腔s突出，盖部12a与安装部12b之间能够形成一定的冗余空间，该冗余空间能够增加盖部12a与电池单体20之间的距离，当外力作用在盖部12a时通过该冗余空间能够对外力进行消减，减小或避免外力作用于电池单体20，对电池单体20造成损伤，特别是当电池包100安装于车辆1000底部且底盖12处于电池包100最低处时，车辆1000行驶过程中地面上的石子等容易飞射到电池包100的底部即底盖12处，击打底盖12，此时冗余空间可减小外力击打对电池单体20的影响。同时，盖部12a相对安装部12b突出，底盖12的盖部12a可以作为底盖12的加强结构，提高底盖12的抗弯性能。
可以理解地，在本申请实施例中，底盖12位于箱体10的底部，并用于界定容纳腔s。
图9为图4所示的电池包100的剖视图。在一些实施例中，请参照图9，底盖12与电池单体20间隔设置。
底盖12与电池单体20间隔设置是指在竖直方向，底盖12与电池单体20之间保持有设定间隔r。在该设定间隔r的作用下底盖12与电池单体20之间形成有缓冲空间，可以避免作用于底盖12的外力传递到电池单体20上而损害电池单体20，特别是当电池包100安装于车辆1000底部且底盖12处于电池包100最低处时，车辆1000行驶过程中地面上的石子等容易飞射到电池包100的底部击打底盖12，此时缓冲空间可中断外力传递到电池单体20对电池单体20造成影响。
底盖12与电池单体20间隔设置的方式可以是：由上述实施例中突出的盖部12a和安装部12b之间形成的冗余空间所形成，还可以是电池单体20中位于主体11内并朝向底盖12的一端与主体11朝向底盖12的一端之间保持设定距离，也就是说，电池单体20仅位于由主体11所界定的容纳腔s的部分范围内，而不位于由底盖12所界定的容纳腔s的范围内，由此来保证电池单体20与底盖12之间保持设定间隔r以形成缓冲空间。
可理解地，当电池包100内包括多个电池单体20时，全部电池单体20均与底盖12间隔设置。进一步为了统一电池单体20的尺寸，各电池单体20与底盖12之间的间隔距离相等。
在一些实施例中，请参照图5和图6，底盖12具有面向容纳腔s的特征面d，特征面d被构造为平面。
特征面d面向容纳腔s表明特征面d是底盖12中能够界定容纳腔s的内表面。特征面d被构造为平面是指在主体11与底盖12的布置方向上，特征面d为与该布置方向垂直的平面。在实际状况下，当主体11与底盖12沿竖直方向布置时，底盖12的特征面d为与水平面相平行的平面。当主体11与底盖12沿水平方向布置时，底盖12的特征面d为与竖直面相平行的 平面。
当特征面d为平面，特征面d可以与容纳于容纳腔s内的各个电池单体20之间保持较为均等的距离(此距离可以为零)。当特征面d与电池单体20之间的距离保持较为均等时，容纳腔s能够容纳更多的电池单体20，即容纳腔s的空间利用率更高，电池包100能够拥有更高的能量密度，电池包100的续航能力更高。
可理解地，当底盖12具有上述盖部12a和上述安装部12b时，特征面d可以由盖部12a面向容纳腔s的内表面构造形成。进一步可理解地，当底盖12与电池单体20间隔设置时，特征面d与电池单体20之间间隔布置。
在一些实施例中，盖部12a背离容纳腔s的外表面与特征面d相平行。
盖部12a背离容纳腔s的外表面与特征面d沿竖直方向相背布置。盖部12a的外表面用于与大气环境接触，并承受外力击打。当盖部12a的外表面是与特征面d平齐的平面，特别在底盖12与主体11沿竖直方向布置在车辆1000的底部且底盖12位于电池包100的最低处，盖部12a的外表面呈平面时可以大大减小电池包100所产生的风阻，有助于降低车辆1000的行驶阻力，降低车辆1000行驶能耗，提高电池包100的续航能力。
图10为图6所示的底盖12在竖直方向的正投影示意图。其中，S1表示特征面d的投影面积，S2表示底盖12的投影面积。
在一些实施例中，在竖直方向，特征面d的正投影的面积S1与底盖12的正投影的面积S2满足：S1/S2≥0.2。进一步地，S1/S2≥0.5。
在图10所示的实施例中，在竖直方向的正投影，特征面d由第一特征边d1、第二特征边d2、第三特征边d3、第四特征边d4首尾连接围合形成，特征面d的正投影的面积S1则为由第一特征边d1、第二特征边d2、第三特征边d3和第四特征边d4界定而出的区域面积。底盖12的正投影的面积S2则是由底盖12的边缘所界定而出的区域面积。
具体地，特征面d的正投影的面积S1与底盖12的正投影的面积S2两者的比值可以是0.3、0.4、0.5、0.6、0.7、0.8、0.9、1。
表2面积S1与面积S2的比值对电池包100续航里程的影响
No. S1/mm 2 S2/mm 2 S1/S2 测试结果
1 0.3×10 6 2.6×10 6 0.115 差
2 0.52×10 6 2.6×10 6 0.2 较好
3 0.94×10 6 2.6×10 6 0.362 较好
4 1.3×10 6 2.6×10 6 0.5 好
5 1.5×10 6 2.6×10 6 0.577 好
6 1.8×10 6 2.6×10 6 0.692 好
7 2.2×10 6 2.6×10 6 0.846 优秀
8 2.4×10 6 2.6×10 6 0.923 优秀
9 2.6×10 6 2.6×10 6 1 优秀
表2给出了按NEDC(New European Driving Cycle)标准进行测试的几组特征面d的正 投影的面积S1与底盖12的正投影的面积S2比值对电池包100续航里程的影响。当S1/S2小于0.2时，电池包100续航里程较差，究其原因是由于特征面d较小时，容纳腔s的空间利用率较低，电池包100内所容纳的电池单体20数量较少，电池包100的能量密度比较低，造成电池包100续航里程较短，测试结果较差。当S1/S2的比值达到0.2及以上时(特别是S1/S2达到0.5及以上时)，随着比值越大，电池包100续航里程越好，究其原因是特征面d越大，容纳腔s的空间利用率更高，电池包100的能量密度越高，因此电池包100续航里程越来越高，测试结果越来越好。
由于特征面d为平面，当特征面d所占底盖12面积越大，则底盖12中相对特征面d凹陷或凸出的内表面的面积越小。相对特征面d凹陷的内表面会使得容纳腔s中的部分空间不规整而无法安装电池单体20，造成容纳腔s的空间利用率低。相对特征面d凸出的内表面所形成的容纳腔s的部分空间也因不规整而无法容纳电池单体20，造成容纳腔s的空间利用率低。容纳腔s空间利用率低时，电池包100内单位空间的电池单体20所占体积小，电池包100的能量密度低。因此，特征面d所占底盖12面积越大，电池包100的空间利用率越大，电池包100的能量密度更高，电池包100的续航里程越好。
在一些实施例中，请参照图10，在竖直方向，特征面d的正投影呈矩形。
如图10所示，呈矩形的特征面d是由第一特征边d1、第二特征边d2、第三特征边d3和第四特征边d4围合界定的区域。在电池包100中，多个电池单体20大多组装形成矩形结构，将特征面d构造呈矩形，能够与电池包100内电池单体20所形成整体构造相适应，有助于在容纳腔s内布置更多的电池单体20，提高电池包100的能量密度。
当然，在其他实施例中，在竖直方向，特征面d的正投影也可以呈其他形状，如圆形、多边形、椭圆形及其他异形。
在本申请的实施例中，主体11包括承载件11a。
承载件11a可以是主体11中用于界定容纳腔s的部件(例如承载件11a是上文中提及的顶盖或框架)，也可以是不用于界定容纳腔s但位于容纳腔s内的部件(例如承载件11a是上文中提及的支撑板)，具体不限定。当承载件11a用于界定容纳腔s时，承载件11a可以是主体11中与底盖12径直连接的部件(如上文提及的框架)，也可以是与底盖12不连接的部件(如上文提及的顶盖)。
在一些实施例中，电池单体20设置于承载件11a表面。
此时，承载件11a是能够承载电池单体20重量的部件，可以是承载板、承载杆、承载块、承载片、承载框、承载绳等，具体不限定。具体可以是，电池单体20支撑在承载件11a上，此时电池单体20可以设置在承载件11a的上方。具体还可以是，电池单体20挂设在承载件11a上，此时电池单体20可以挂在承载件11a的与电池单体20重力方向平行的壁面上。
电池单体20可以设置在承载件11a的上方(如承载件11a作为位于容纳腔s内的支撑板 时)，电池单体20也可以设置在承载件11a的下方(如承载件11a作为用于界定容纳腔s的顶盖时)，电池单体20也可以设置在承载件11a的侧方(如承载件11a作为用于界定容纳腔s的框架时)。
在一些实施例中，电池单体20与承载件11a粘接。
具体地，电池单体20与承载件11a之间可以诸如环氧树脂胶、丙烯酸酯胶等胶黏剂实现粘接，具体不限定。此时，电池单体20与承载件11a之间粘接，不仅方便连接，而且可简化电池包100的结构。
在一些实施例中，电池单体20设置于承载件11a表面，且承载件11a的最小厚度H与电池包100的重量M满足：0.0002mm/kg＜H/M≤0.2mm/kg。
承载件11a的厚度是指承载件11a中用于设置电池单体20的一侧表面与其相背的另一侧表面之间的距离。当电池单体20设置于承载件11a竖直方向的表面时，则承载件11a的最小厚度H是指承载件11a在竖直方向的两侧表面的距离最小处，当电池单体20于承载件11a水平方向的表面时，承载件11a的厚度是指承载件11a在水平方向的两侧表面的的距离最小处。
电池包100的重量包含了主体11、底盖12、电池单体20及其他组成结构(如线束、热管理系统、电源管理系统等)的全部重量。
具体地，承载件11a的最小厚度H与电池包100的重量M之间的比值可以设计为：0.0003mm/kg、0.0005mm/kg、0.0008mm/kg、0.001mm/kg、0.003mm/kg、0.005mm/kg、0.008mm/kg、0.01mm/kg、0.03mm/kg、0.05mm/kg、0.06mm/kg、0.08mm/kg、0.1mm/kg、0.12mm/kg、0.15mm/kg、0.16mm/kg、0.19mm/kg、0.02mm/kg。
表3承载件11a最小厚度H与电池包100重量M的比值对电池包100安全性能的影响
No. H(mm) M(Kg) H/M(mm/Kg) 测试结果
1 0.1 1000 0.0001 起火，爆炸
2 0.2 1000 0.0002 起火，爆炸
3 0.6 600 0.001 不起火，不爆炸
4 1.5 500 0.003 不起火，不爆炸
5 2.5 500 0.005 不起火，不爆炸
6 4 500 0.008 不起火，不爆炸
7 3 300 0.01 不起火，不爆炸
8 9 300 0.03 不起火，不爆炸
9 10 200 0.05 不起火，不爆炸
10 12 200 0.06 不起火，不爆炸
11 16 200 0.08 不起火，不爆炸
12 20 200 0.1 不起火，不爆炸
13 30 200 0.15 不起火，不爆炸
14 40 200 0.02 不起火，不爆炸
表3给出按GB 38031-2020《电动汽车用动力蓄电池安全要求》的标准下进行测试的几组承载件11a的最小厚度H与电池包100的重量M的比值对电池包100安全性能的影响结果。 从表3中可以看出，当H/M的比值不超过0.0002mm/Kg，电池包100会起火爆炸，究其原因是电池包100的结构强度不满足要求。当H/M的比值超过0.0002mm/Kg时，电池包100不会起火爆炸。但是，当H/M过大(如超过0.1时)，由于电池包100重量小而承载板厚度大，使得电池包100在单位体积内电池单体20的占比较低，空间利用率较低，电池包100的能量密度过低，电池包100的使用成本较高。进一步地，0.0005mm/Kg≤H/M≤0.1mm/Kg，此时电池包100的结构强度满足要求且电池包100的能量密度较高，电池包100的续航能力更强且不会出现起火爆炸等安全事故。
在一些实施例中，承载件11a的最小厚度H满足：0.2mm＜H＜20mm。
具体地，承载件11a的最小厚度H可以为：0.3mm、0.5mm、0.8mm、0.9mm、1.0mm、1.2mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm、5mm、5.5mm、6mm、6.5mm、7mm、7.5mm、8mm、9mm、10mm、12mm、15mm、16mm、18mm、19mm。进一步地，0.5mm≤H≤10mm，此时承载件11a具有较好的结构强度，电池包100整体强度较好，电池包100不易起火和爆炸。同时承载件11a对电池包100整体的体积占用较小，电池包100的空间利用率较高，电池包100的能量密度较高。
在一些实施例中，请参照图3和图4，电池单体20悬吊于承载件11a。
电池单体20悬吊于承载件11a是指电池单体20设置在承载件11a竖直方向的下方，且由承载件11a承担电池单体20的重量。电池单体20悬吊在承载件11a的方式包括：电池单体20直接粘接在承载件11a的下表面、电池单体20通过紧固件13连接在承载件11a上且位于承载件11a的下方、电池单体20通过挂钩等挂设在承载件11a上且位于承载件11a的下方等。
此时，电池单体20悬吊在承载件11a的下方，底盖12位于箱体10的底部，在对电池包100的内部进行维修时，拆卸底盖12即可暴露电池单体20而无需拆出承载件11a，电池包100的维护更加方便。同时，在维修电池包100时，可以将电池单体20从下方拆装于承载件11a上，特别是承载件11a作为车辆1000底盘的至少一部分而受力时，仅需从承载件11a的下方拆装电池单体20而不需要拆除承载件11a，方便电池包100的维修。
图11为本申请一些实施例中的电池单体20的外形示意图。图12为图11所示的电池单体20的主视图。
在一些实施例中，请一并参照图4和图11，电池单体20面向承载件11a的外表面为第一外表面m1，电池单体20包括电极端子21a，电极端子21a布置于电池单体20除第一外表面m1之外的外表面。
如上文介绍，电极端子21a用于与电池单体20内部的电极组件23电连接，以用于输出或输入电池单体20的电能的部件。电极端子21a至少部分伸出于电池单体20之外，以与外部电连接。电池单体20之间的串联、并联均通过各自的电极端子21a之间的串联、并联实现。 电极端子21a具有导电性，以实现电传输，可以是铝电极、铜电极等。
电极端子21a布置在电池单体20除第一外表面m1之外的外表面上。第一外表面m1面向承载件11a，通常是光滑表面，其上未凸出或凹陷有诸如电极端子21a、注液孔的结构。当电池单体20悬吊于承载件11a时，第一外表面m1为电池单体20朝上的外表面。具体到一实施例中，电池单体20包括上文中的壳体22及端盖21，壳体22及端盖21形成电池单体20容纳电极组件23的内部环境。端盖21位于壳体22的一端，电极端子21a布置端盖21上，此时壳体22的任一外表面均可作为电池单体20的第一外表面m1。
电极端子21a包括正极端子和负极端子，正极端子用于与电极组件23中的正极片电连接，负极端子用于与电极组件23中的负极片电连接。需要说明地，正极端子和负极端子可以布置在电池单体20的同一外表面上(如方形电池单体20)，也可以分别布置在电池单体20不同的两个外表面(如圆柱形电池单体20)上。当正极端子和负极端子布置在电池单体20不同的两个外表面上时，第一外表面m1为电池单体20中与该两个外表面不同的表面。
电池包100除了电池单体20之外，通常还设置有电连接各电池单体20的采样线束、高压线速和对电池单体20进行防护的防护结构等部件，此时，将电极端子21a布置在电池单体20除第一外表面m1之外的其他表面，在电极端子21a上采样线束、高压线束、防护结构等部件时，不会受到承载件11a的限制而可以通过电池单体20与主体11除承载件11a之外的其他结构之间的空间(如通过电池单体与底盖之间的空间和/或电池单体与主体内侧面之间的空间)布置各个部件，更加方便各个部件的设置。同时由于第一外表面m1是光滑的表面，可以将第一外表面m1与承载件11a相贴合，如此可实现电池单体20与承载件11a的贴合安装，不需在电池单体20与承载件11a之间预留空间，有助于提高电池包100的空间利用率。
在一些实施例中，请一并参照图11和图12，电池单体20具有与第一外表面m1相背设置的第二外表面m2，电极端子21a布置于第二外表面m2。
第二外表面m2是电池单体20与第一外表面m1相背设置的外表面，当电池单体20悬吊于承载件11a时，第二外表面m2与底盖12相对。如上文所述，电池单体20与底盖12之间可以间隔设置。此时第二外表面m2与底盖12之间具有缓冲空间，且电极端子21a伸出电池单体20之外的部分位于该缓冲空间内，如此与电极端子21a连接的线束和连接片可以布置在缓冲空间内。同时，缓冲空间还具有上文中所提到的能够阻断击打于底盖12的外力作用到电池单体20而损伤电池单体20。因此，缓冲空间不仅能够中断外力影响，还能够进行线束等的布局，一举两得。此外，缓冲空间和电池包100的空间利用率也得到提高。
当然，在其他实施例中，参照图11和图12，电极端子21a也可以布置在电池单体20中与第一外表面m1相交的第三外表面上。
在本申请的一些实施例中，请参照图4、图5及图9，承载件11a位于箱体10的顶部，并用于界定容纳腔s。由于底盖12位于箱体10的底部，因此承载件11a与底盖12相对布置。 承载件11a作为箱体10顶部的结构，箱体10可经由承载件11a安装于安装体上。此时，设置在承载件11a上的电池单体20，能够加强承载件11a的强度，进而提高电池包100顶部的刚度，如此可将电池包100应用场景扩展至顶部受力的场景下，如作为车辆1000底盘的一部分使用。
图13为本申请一些实施例中的承载件11a的结构示意图。图14为本申请另一些实施例中的承载件11a的结构示意图。图15为图14所示的承载件11a在竖直方向的正投影图。
在一些实施例中，承载件11a具有面向容纳腔s的承载面f，承载面f被构造为平面。
承载面f是承载件11a面向容纳腔s的内表面，且用于界定容纳腔s。承载面f被构造为平面是指在主体11与底盖12的布置方向上，承载面f为与布置方向垂直的平面。在实际状况下，当主体11与底盖12沿竖直方向布置时，承载件11a与底盖12沿竖直方向相对设置，承载件11a的承载面f为与水平面相平行的平面。当主体11与底盖12沿水平方向布置时，承载件11a与底盖12沿水平方向相对设置，承载件11a的承载面f为与竖直面相平行的平面。
如图13所示，承载件11a可以是承载件11a面向容纳腔s的内表面的全部，此时承载件11a可以呈平板状。如图14和图15所示，承载件11a也可以是承载件11a面向容纳腔s的内表面的一部分，此时承载面f仅为承载件11a的内表面中用于界定容纳腔s的部分。
当承载面f为平面，承载面f可以与容纳于容纳腔s内的各个电池单体20之间保持较为均等的距离(此距离可以为零)。当承载面f与电池单体20之间的距离保持较为均等时，容纳腔s内能够容纳更多的电池单体20，也就是说容纳腔s的空间利用率更高，电池包100能够拥有更高的能量密度，电池包100的续航能力更高。
在一些实施例中，电池单体20设置于承载面f。电池单体20经由承载面f安装在承载件11a上。电池单体20可以粘接于承载面f，也可以经由紧固件13等固定连接在承载面f，还可以焊接、卡接于承载面f，具体不限定。
由于承载面f是平面，承载面f可以与设置于自身的电池单体20具有较大的接触面积，电池单体20的安装更加稳固。同时，承载面f呈平面时，相比呈曲面等不平整面，承载面f能够与更多数量的电池单体20实现连接，可提高电池包100内电池单体20的安装数量，进而提高电池包100的空间利用率及能量密度。
可理解地，当电池单体20悬吊于承载件11a时，此时，电池单体20悬吊于承载面f。
在一些实施例中，在竖直方向，承载面f的正投影的面积N1与承载件11a的正投影的面积N2满足：N1/N2≥0.2。进一步地，N1/N2≥0.5。
在图15所示的实施例中，在竖直方向的正投影，承载面f由第一承载边f1、第二承载边f2、第三承载边f3及第四承载边f4首尾连接围合形成，承载面f的正投影的面积N1则为由第一承载边f1、第二承载边f2、第三承载边f3和第四承载边f4界定而出的区域面积。承载件11a的正投影的面积N2则是由承载件11a的边缘所界定而出的区域面积。
具体地，承载面f的正投影的面积N1与承载件11a的正投影的面积N2两者的比值可以是0.2、0.3、0.4、0.5、0.6、0.7、0.8、0.9、1。
表4面积N1与面积N2的比值对电池包100续航里程的影响
No. N1(mm 2) N2(mm 2) N1/N2 测试结果
1 1.8×10 5 2.16×10 6 0.083 差
2 2.16×10 5 2.16×10 6 0.1 差
3 4.32×10 5 2.16×10 6 0.2 较好
4 8×10 5 2.16×10 6 0.37 较好
5 1.2×10 6 2.16×10 6 0.56 好
6 1.7×10 6 2.16×10 6 0.787 优秀
7 2.16×10 6 2.16×10 6 1 最优
表4给出了按NEDC(New European Driving Cycle)标准进行测试时，几组承载面f的正投影的面积N1与承载件11a的正投影的面积N2的比值对电池包100续航里程的影响。当N1/N2小于0.2时，电池包100续航里程较差，究其原因是由于承载面f较小时，承载于承载件11a上的电池单体20数量较小，容纳腔s的空间利用率较低，电池包100的能量密度比较低，造成电池包100续航里程较短，测试结果较差。当N1/N2的比值达到0.2及以上时(特别是N1/N2达到0.5及以上时)，随着比值越大，电池包100续航里程越好，究其原因是承载面f越大，承载于承载件11a上的电池单体20数量越多，容纳腔s的空间利用率越高，电池包100的能量密度越高，因此电池包100续航里程越来越高，测试结构越来越好。当承载件11a为图13所示的平板结构时，此时的承载面f的正投影面积N1与承载件11a的正投影面积N2相等，电池包100续航效果最好。
在一些实施例中，在竖直方向，承载面f的正投影呈矩形。
如图15所示，呈矩形的承载面f是由第一承载边f1、第二承载边f2、第三承载边f3和第四承载边f4围合界定的区域。在电池包100中，多个电池单体20大多组装形成矩形结构，将承载面f构造呈矩形，能够与电池所形成整体构造相适应，有助于在容纳腔s内布置更多的电池单体20，提高电池包100的能量密度。
当然，在其他实施例中，在竖直方向，承载面f的正投影也可以呈其他形状，如圆形、多边形、椭圆形及其他异形。
在一些实施例中，请参照图14，承载件11a具有承载部11a1及连接部11a2，连接部11a2围合连接在承载部11a1的边缘，承载部11a1用于界定容纳腔s，连接部11a2连接于箱体10除承载件11a之外的部分。
承载部11a1用于界定容纳腔s，连接部11a2用于与箱体10除承载件11a之外的部分连接，而不参与容纳腔s的界定。承载部11a1可以是板状、块状构件，可以是平板状、弯板状的构件，具体不限定。从图14中可以看出，连接部11a2围合在承载部11a1的边缘是指连接部11a2沿承载部11a1的边缘连续呈首尾封闭连接的结构。可理解地，在竖直方向的投影， 连接部11a2具有一定宽度，如此可与箱体10除承载件11a之外的其他结构具有适当的接触面积，更加方边实现连接部11a2与箱体10除承载件11a之外的其他结构的安装连接。
承载部11a1与连接部11a2可以一体成型。当承载件11a是金属材质(如铝、铁、不锈钢等)，承载部11a1与连接部11a2可以采用压铸、锻造、热压、冷压等方式一体成型。当承载件11a是塑料材质(如PP、PE、ABS等)，承载部11a1与连接部11a2可以采用注塑一体成型。承载部11a1与连接部11a2也可以单独成型后连接在一起。当承载部11a1与连接部11a2为金属材质，承载部11a1与连接部11a2可以焊接、粘接在一起。当承载部11a1与连接部11a2为塑料材质，盖部12a与安装部12b可以粘接在一起。当然，承载部11a1与连接部11a2也可通过卡接、铆接等其他方式固定连接在一起。
具体地，连接部11a2与主体11除承载件11a之外的部分连接，连接方式既可以是一体成型也是可以固定连接。当连接部11a2与主体11除承载件11a之外的部分一体成型时，也就是说主体11是一体成型制件，可通过压铸、锻造、热压、冷压、注塑等方式一体成型。当连接部11a2与主体11除承载件11a之外的部分固定连接时，可以经由紧固件13紧固连接、卡合结构卡接连接等方式固定连接，具体不限定。
承载部11a1与连接部11a2可以位于同一平面内。具体可选地，承载部11a1与连接部11a2均面向底盖12的两个表面处于同一平面内，和/或承载部11a1与连接部11a2均背向底盖12的两个表面处于同一平面。当承载部11a1与连接部11a2均面向底盖12的两个表面以及均背向底盖12的两个表面均分别处于同一平面时，承载部11a1与连接部11a2可以形成一平板状的承载件11a(如图13所示)。
承载部11a1与连接部11a2也可以不位于同一平面内。具体地，承载部11a1相对连接部11a2背离容纳腔s凸出，或者承载部11a1相对连接部11a2朝向容纳腔s凹陷，具体不限定。承载部11a1与连接部11a2的厚度可以相等，也可以不等，具体不限定。
此时，承载件11a经由承载部11a1界定容纳腔s，并经由连接部11a2实现与主体11除承载件11a之外的结构连接，结构分明。
可理解地，当承载件11a包括上述承载部11a1和上述连接部11a2时，电池单体20设置于承载部11a1。
可理解地，当承载件11a包括上述承载部11a1和上述连接部11a2时，承载部11a1面向容纳腔s的内表面构造形成承载面f。
在一些实施例中，承载部11a1相较于连接部11a2沿背离容纳腔s的方向突出设置。
由上文可知，承载部11a1界定容纳腔s，承载部11a1背离容纳腔s突出是指承载部11a1与连接部11a2在竖直方向错开布置。承载部11a1位于承载件11a的最高处。此时，承载部11a1与连接部11a2之间可形成一定作为容纳腔s的一部分的空间，该空间可容纳电池单体20。
当承载部11a1相较于连接部11a2背离容纳腔s突出，承载部11a1可以作为承载件11a的加强结构，提高承载件11a的抗弯性能。
在一些实施例中，承载部11a1与连接部11a2的厚度相等。
当承载部11a1与连接部11a2的厚度相等，承载部11a1与连接部11a2可以经由同一板材经压铸、冷压、热压一体成型，承载件11a的成型更加方便。同时，承载部11a1与连接部11a2的厚度相等，在成型时各处应力均等，可提高承载件11a的成型率。
在一些实施例中，承载部11a1背离容纳腔s的外表面与承载面f相平行。
承载部11a1背离容纳腔s的外表面与承载面f沿竖直方向相背设置。承载部11a1的外表面能够与大气环境相接触。当电池包100安装于车辆1000时，外表面呈平面的承载部11a1能够降低车辆1000的行驶阻力，降低车辆1000的行驶能耗能耗低，提高电池包100的续航能力。
在一些实施例中，请参照图3、图4及图9，主体11包括边框11b和承载件11a，边框11b围合形成有在竖直方向的两端贯通设置的空腔q，底盖12和承载件11a分别盖合于空腔q在竖直方向的相背两端，底盖12、边框11b和承载件11a共同围合形成容纳腔s。
边框11b自身围合形成在竖直方向的两端贯通的空腔q，承载件11a盖合在空腔q的顶部，底盖12盖合在空腔q的底部，即，承载件11a位于箱体10的顶部且用于界定容纳腔s，底盖12位于箱体10的底部且用于界定容纳腔s。边框11b、承载件11a及底盖12三者围合形成容纳腔s。边框11b、承载件11a及底盖12可以为相同材料制件，如铝合金、铜合金、钢材、塑料等。当然，边框11b、承载件11a及底盖12也可以采取不同的材料制成，具体不限定。在竖直方向的正投影，边框11b可以呈矩形、圆形、多边形等，具体不限定。
当承载件11a包括上述承载部11a1及连接部11a2时，承载件11a经由连接部11a2与边框11b连接。当底盖12包括上述盖部12a和上述安装部12b时，底盖12经由安装部12b与边框11b连接。
此时，以边框11b为基础，并将承载件11a和底盖12分别连接在边框11b的竖直方向的两端后即可形成电池包100的容纳腔s，箱体10结构较为简单。
在一些实施例中，承载件11a与边框11b固定连接或一体成型。承载件11a与边框11b可采取注塑、压铸、锻造、冷压、热压等方式一体成型。承载件11a与边框11b可以经由紧固件13紧固连接、卡合结构卡接、焊接、粘接、热熔连接等实现固定连接。
当承载件11a与边框11b一体成型，主体11一体成型，主体11只需与底盖12连接即可实现箱体10的组装，箱体10组装方便。当承载件11a与边框11b固定连接，承载件11a与边框11b的成型工艺较为容易，可降低箱体10的工艺成本。
可以理解的，当承载件11a具有承载部11a1和连接部11a2时，由连接部11a2与边框11b连接。当底盖12具有盖部12a和安装部12b时，由安装部12b与边框11b连接。
图16为图4所示的电池包100的主视图。请参照图16和图12，在一些实施例中，在竖直方向上，电池单体20的高度Hc与电池包100的高度Hp满足：0.02≤Hc/Hp≤0.98。
电池单体20的高度Hc是指在主体11与底盖12沿竖直方向布置时，电池单体20在竖直方向的最大长度。以图12所述的电池单体20为例，当电池单体20的第一外表面m1为与电极端子21a所在的外表面向背设置时，电池单体20的最大长度是指电极端子21a与第一外表面m1之间的距离。当然，在电池单体20的第一外表面m1为与电极端子21a所在的外表面相邻时，则电池单体20的高度Hc是指电池单体20的第一外表面m1至与其相背设置的外表面之间的距离。
电池包100的高度Hp是指在主体11与底盖12沿竖直方向布置时，电池包100在竖直方向的最大长度。
具体地，电池单体20的高度Hc与电池包100的高度Hp的比值可以为0.02、0.03、0.05、0.08、0.1、0.15、0.2、0.25、0.3、0.35、0.4、0.45、0.5、0.55、0.6、0.65、0.7、0.75、0.8、0.85、0.9、0.95、0.98。
表5电池单体20高度Hc与电池包100高度Hp的比值对电池包100的安全性的影响
No. Hc/mm Hp/mm Hc/Hp 测试结果
1 248 252 0.984 起火，爆炸
2 138 150 0.92 不起火，不爆炸
3 115 135 0.85 不起火，不爆炸
4 90 120 0.75 不起火，不爆炸
5 78 120 0.65 不起火，不爆炸
6 110 200 0.55 不起火，不爆炸
7 60 200 0.3 不起火，不爆炸
8 60 600 0.1 不起火，不爆炸
9 50 1000 0.05 不起火，不爆炸
表5给出了按GB 38031-2020《电动汽车用动力蓄电池安全要求》的标准下进行测试的几组电池单体20的高度Hc与电池包100的高度Hp的比值对电池包100的安全性的影响。由表5可以看出，Hc/Hp超过0.98时，箱体10的结构所占电池包100高度很小，箱体10的强度无法满足要求，会出现起火爆炸的安全事故。当0.02≤Hc/Hp时，箱体10的结构强度能够满足要求，不会出现起火和爆炸的情况。当Hc/Hp小于0.2时，箱体10的结构强度虽然能够满足要求，但是电池包100的空间利用率低，能量密度过低。
进一步地，0.5≤Hc/Hp＜0.94，不仅电池包100的强度满足要求，不会出现起火爆炸的安全事故，而且电池包100的空间利用率较高，电池包100的能量密度较高。
根据本申请的一些实施例，电池包100包括箱体10及电池单体20，箱体10围合形成有容纳腔s，箱体10包括位于自身底部并用于界定容纳腔s的底盖12，电池单体20容纳于容 纳腔s内，其中，底盖12具有面向容纳腔s的特征面d，特征面d被构造为平面。当特征面d为平面，特征面d可以与容纳于容纳腔s内的各个电池单体20之间保持较为均等的距离(此距离可以为零)。当特征面d与电池单体20之间的距离保持较为均等时，容纳腔s能够容纳更多的电池单体20，即容纳腔s的空间利用率更高，电池包100能够拥有更高的能量密度，电池包100的续航能力更高。
另一方面，本申请还提供了一种用电装置。该用电装置包括上述任一实施例中提供的电池包100，电池包100用于为用电装置提供电能。关于用电装置的介绍参照上述描述中的记载，在此不进行赘述。
由于该用电装置包括上述电池包100，因此其具备上述实施例中的所有有益效果，在此不赘述。
图17为本申请的一些实施例中电池包100应用于车身200的示意图。图18为图17所示结构的第一分解状态图。图19为图17所示结构的第二分解状态图。
在一些实施例中，请参照图17至图19，用电装置包括车辆1000，电池包100设置在车辆1000车身200的底部。关于车辆1000的介绍参照上述描述中的记载，在此不进行赘述。
车辆1000的车身200是指车辆1000用来载人装货的部分，包括驾驶舱、乘客舱、发动机舱、行李舱等。车身200通常包括车身200壳体22及设于车身200壳体22上的车门、车窗、装饰件、座椅、空气调节装置等等。车身200壳体22通常指车辆1000纵梁、横梁、底盘及支柱等主要承力元件以及与它们相连的钣金件共同组成的结构。在本申请的实施例实施例中，电池包100设置于车身200的底部主要是指电池包100设置于车身200壳体22的底部。
此时，将电池包100设置在车身200的底部，不会占用车身200内部的空间，有助于降低车身200体积和重量。
图20为本申请的一些实施例中电池包100与车身200的安装关系示意图。在一些实施例中，请参照图20，主体11包括位于箱体10顶部的承载件11a，承载件11a用于界定容纳腔s，在竖直方向，承载件11a与车身200的距离L满足：L≥0。
由于电池包100位于车身200的底部，而承载件11a位于箱体10的顶部，因此电池包100中承载件11a距离车身200最近。承载件11a与车身200的距离L是指在竖直方向，承载件11a的最高处与位于自身上方的车身200之间的距离。当承载件11a包括上述承载部11a1和上述连接部11a2时，承载件11a与车身200的距离L为承载部11a1背离容纳腔s的外表面与位于其上方的车身200之间的距离。
当承载件11a与车身200的距离L等于0时，承载件11a与车身200贴合，当承载件11a与车身200的距离L大于0时，承载件11a与车身200间隔且不贴合。可理解地，此时底盖12处于承载件11a的底部，底盖12与车身200的距离g大于0。
在电池包100设置车身200下方时，电池包100底部至车身200的距离内的范围是电池 包100所占用的安装空间。当承载件11a与车身200间隔时，电池包100与车身200之间会存在一定的浪费空间，若将承载件11a与车身200贴合，则可以将电池包100与车身200之间存在的浪费空间划入到电池包100的空间范围内，如此在车身200下方占用相同空间的情况下，电池包100与车身200贴合能够提高电池包100的体积，进而能够增加电池包100的电量和能量密度。
此时，当承载件11a与车身200的距离L等于零，电池包100能够具有较大电量和较高的能量密度，车辆1000续航能力强。当承载件11a与车身200的距离L大于零，承载件11a的安装较为灵活。
在一些实施例中，请参照图17至图19，主体11包括位于箱体10顶部的承载件11a，承载件11a用于界定容纳腔s，电池包100经由承载件11a安装于车身200。
由于电池包100位于车身200的底部，而承载件11a位于箱体10的顶部，因此电池包100中承载件11a距离车身200最近，电池包100经由承载件11a安装于车身200，具体可以是承载件11a经由紧固件13(如螺钉、螺栓、铆钉等)、焊接等方式固定在车身200。
当电池单体20设置在承载件11a上时，电池单体20与承载件11a形成的结构与车身200连接，可以提高电池包100的顶部强度，进而提高电池包100的安装强度。
在一些实施例中，承载件11a被配置为形成车身200底盘的至少一部分。
底盘作为车身200的一部分，由传动系、行驶系、转向系和制动系四部分组成的组合，用于支承、安装车辆1000发动机及其各部件、总成，形成车辆1000的整体造型，承受发动机动力，保证正常行驶。
底盘位于车身200的底部，承载件11a直接作为底盘的至少一部分。即，承载件11a用于形成车身200的底盘的至少一部分。如此，将承载件11a与车身200底盘集成于一体，如此可将传统底盘与电池包100之间的间隙所占用的空间划分到电池包100内用来提高电池包100的空间，如此有助于提高电池包100的能量，进而能够提高车辆1000的续航能力。
根据本申请的一些实施例，请参照图17至图19，用电装置包括车辆1000，车辆1000车身200的底部设置有电池包100。电池包100包括箱体10和电池单体20，箱体10包括位于其顶部的承载件11a，电池单体20位于箱体10内并悬吊在承载件11a上，且电池单体20的电极端子21a位于电池单体20背离承载件11a的外表面上，承载件11a形成车辆1000底盘的至少一部分。
此时，电池单体20悬吊在承载件11a上，可以提高承载件11a的强度进而提高电池单体20顶部的强度，使得承载件11a作为底盘时能够达到一定的受力要求。同时，电池单体20的电极端子21a背离承载件11a，可以将电池单体20直接安装在承载件11a上，省去电池单体20与承载件11a之间的空隙，并将节省的空隙用于增加电池单体20的安装空间，可提高电池包100的能量，进而提高车辆1000的续航能力。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (18)

  1. 一种电池包，包括：
    箱体，围合形成有容纳腔，所述箱体包括位于自身底部并用于界定所述容纳腔的底盖；及
    电池单体，容纳于所述容纳腔内；
    其中，所述底盖具有面向所述容纳腔的特征面，所述特征面被构造为平面。
  2. 根据权利要求1所述的电池包，其中，在竖直方向，所述特征面的正投影的面积S1与所述底盖的正投影的面积S2满足：S1/S2≥0.2。
  3. 根据权利要求1或2所述的电池包，其中，在竖直方向，所述特征面的正投影呈矩形。
  4. 根据权利要求1至3中任一项所述的电池包，其中，所述底盖具有盖部及安装部，所述安装部围合连接于所述盖部的边缘，所述盖部用于界定所述容纳腔，所述安装部安装于所述箱体除所述底盖之外的部分；
    所述盖部面向所述容纳腔的内表面构造形成所述特征面。
  5. 根据权利要求4所述的电池包，其中，所述盖部背离所述容纳腔的外表面与所述特征面相平行。
  6. 根据权利要求4或5所述的电池包，其中，所述盖部相较于所述安装部沿背离所述容纳腔的方向突出设置。
  7. 根据权利要求4至6中任一项所述的电池包，其中，所述盖部与所述安装部的厚度相等。
  8. 根据权利要求1至7中任一项所述的电池包，其中，所述底盖与所述电池单体间隔设置。
  9. 根据权利要求1至8中任一项所述的电池包，其中，所述箱体还包括位于自身顶部的承载件，承载件用于界定容纳腔，所述电池单体悬吊于所述承载件。
  10. 根据权利要求9所述的电池包，其中，所述电池单体面向所述承载件的外表面为第一外表面，所述电池单体包括电极端子，所述电极端子布置于所述电池单体除所述第一外表面之外的外表面。
  11. 根据权利要求10所述的电池包，其中，所述电池单体具有与所述第一外表面相背设置的第二外表面，所述电极端子布置于所述第二外表面。
  12. 根据权利要求9至11中任一项所述的电池包，其中，所述电池单体与所述承载件粘接。
  13. 根据权利要求1至8中任一项所述的电池包，其中，所述箱体还包括承载件和边框， 所述边框围合形成有在竖直方向的两端贯通设置的空腔，所述底盖和所述承载件分别盖合于所述空腔在竖直方向的相背两端，所述底盖、所述边框和所述承载件共同围合形成所述容纳腔。
  14. 根据权利要求13所述的电池包，其中，所述承载件与所述边框固定连接或一体成型。
  15. 一种用电装置，包括如权利要求1至14中任一项所述的电池包，所述电池包用于为所述用电装置提供电能。
  16. 根据权利要求15所述的用电装置，其中，所述用电装置包括车辆，所述电池包设置于所述车辆车身的底部。
  17. 根据权利要求16所述的用电装置，其中，所述箱体还包括位于自身顶部的承载件，所述承载件用于界定所述容纳腔；
    所述电池包经由所述承载件安装于所述车身。
  18. 根据权利要求17所述的用电装置，其中，所述承载件被配置为形成所述车身底盘的至少一部分。
PCT/CN2022/098370 2022-02-21 2022-06-13 电池包及用电装置 WO2023240391A1 (zh)

Priority Applications (18)

Application Number Priority Date Filing Date Title
KR1020247012987A KR20240060675A (ko) 2022-06-13 2022-06-13 전지 팩 및 전기 장치
EP22946092.8A EP4425658A1 (en) 2022-06-13 2022-06-13 Battery pack and electric apparatus
CN202280005969.0A CN116249630A (zh) 2022-06-13 2022-06-13 电池包及用电装置
PCT/CN2022/098370 WO2023240391A1 (zh) 2022-06-13 2022-06-13 电池包及用电装置
CN202223290764.8U CN219226517U (zh) 2022-06-13 2022-12-08 电池包及用电装置
CN202380008510.0A CN116868417B (zh) 2022-02-21 2023-01-03 电池和用电装置
KR1020247022516A KR20240117127A (ko) 2022-02-21 2023-01-03 전지 및 전기 장치
CN202410820399.1A CN118610662A (zh) 2022-02-21 2023-01-03 电池和用电装置
KR1020247018661A KR20240099426A (ko) 2022-02-21 2023-01-03 배터리 및 전기 장치
PCT/CN2023/070125 WO2023155620A1 (zh) 2022-02-21 2023-01-03 电池和用电装置
CN202320014525.5U CN219575787U (zh) 2022-02-25 2023-01-03 电池和用电装置
CN202380008506.4A CN116686151A (zh) 2022-02-25 2023-01-03 电池和用电装置
KR1020247018342A KR20240096639A (ko) 2022-02-25 2023-01-03 배터리 및 전기 장치
PCT/CN2023/070129 WO2023160252A1 (zh) 2022-02-25 2023-01-03 电池和用电装置
CN202380008512.XA CN116848705B (zh) 2022-02-21 2023-01-03 电池和用电装置
PCT/CN2023/070126 WO2023155621A1 (zh) 2022-02-21 2023-01-03 电池和用电装置
CN202320014583.8U CN219203337U (zh) 2022-02-21 2023-01-03 电池和用电装置
US18/666,273 US20240304930A1 (en) 2022-06-13 2024-05-16 Battery pack and electrical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/098370 WO2023240391A1 (zh) 2022-06-13 2022-06-13 电池包及用电装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/666,273 Continuation US20240304930A1 (en) 2022-06-13 2024-05-16 Battery pack and electrical apparatus

Publications (1)

Publication Number Publication Date
WO2023240391A1 true WO2023240391A1 (zh) 2023-12-21

Family

ID=86628160

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/098370 WO2023240391A1 (zh) 2022-02-21 2022-06-13 电池包及用电装置

Country Status (5)

Country Link
US (1) US20240304930A1 (zh)
EP (1) EP4425658A1 (zh)
KR (1) KR20240060675A (zh)
CN (2) CN116249630A (zh)
WO (1) WO2023240391A1 (zh)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007273109A (ja) * 2006-03-30 2007-10-18 Hitachi Maxell Ltd 扁平形電池
CN107757327A (zh) * 2016-08-23 2018-03-06 本特勒尔汽车技术有限公司 用于电动机动车的蓄电池载体和用于装备并装配蓄电池载体的方法
US20210339616A1 (en) * 2018-07-20 2021-11-04 Voestalpine Metal Forming Gmbh Battery carrier and vehicle having said battery carrier
DE202021105082U1 (de) * 2021-09-21 2021-12-15 Kirchhoff Automotive Deutschland Gmbh Traktionsbatterieeinheit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007273109A (ja) * 2006-03-30 2007-10-18 Hitachi Maxell Ltd 扁平形電池
CN107757327A (zh) * 2016-08-23 2018-03-06 本特勒尔汽车技术有限公司 用于电动机动车的蓄电池载体和用于装备并装配蓄电池载体的方法
US20210339616A1 (en) * 2018-07-20 2021-11-04 Voestalpine Metal Forming Gmbh Battery carrier and vehicle having said battery carrier
DE202021105082U1 (de) * 2021-09-21 2021-12-15 Kirchhoff Automotive Deutschland Gmbh Traktionsbatterieeinheit

Also Published As

Publication number Publication date
CN116249630A (zh) 2023-06-09
EP4425658A1 (en) 2024-09-04
KR20240060675A (ko) 2024-05-08
US20240304930A1 (en) 2024-09-12
CN116249630A8 (zh) 2024-05-28
CN219226517U (zh) 2023-06-20

Similar Documents

Publication Publication Date Title
US20240313318A1 (en) Battery pack and electric apparatus
WO2024000277A1 (zh) 箱体、电池及用电装置
WO2023240798A1 (zh) 电池箱、电池及用电装置
WO2023240389A1 (zh) 电池包及用电装置
WO2024016451A1 (zh) 顶盖组件、电池单体、电池及用电设备
WO2023240391A1 (zh) 电池包及用电装置
WO2023240394A1 (zh) 电池包及用电装置
WO2024000239A1 (zh) 箱体、电池及用电装置
WO2023240387A1 (zh) 电池包及用电装置
WO2023240397A1 (zh) 电池包及用电装置
WO2024000298A1 (zh) 箱体、电池及用电装置
CN216648506U (zh) 用电设备、电池及电池箱体
WO2024000796A1 (zh) 箱体、电池和用电设备
WO2024000231A1 (zh) 箱体、电池及用电装置
WO2024000255A1 (zh) 箱体、电池及用电装置
WO2024000296A1 (zh) 箱体、电池及用电装置
WO2024000247A1 (zh) 箱体、电池及用电装置
WO2024000258A1 (zh) 箱体、电池及用电装置
CN220753674U (zh) 电池单体、电池及用电装置
WO2023130455A1 (zh) 安装组件、电池、用电装置、电池制造方法及制造设备
CN220692261U (zh) 电池单体、电池及用电装置
CN220934272U (zh) 下箱体、电池包和用电设备
CN116998053A (zh) 电池壳体结构及其制造方法、电池及用电设备
CN117954768A (zh) 用于电池的箱体、电池和用电设备
CN116368661A (zh) 用电装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 202280005969.0

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22946092

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20247012987

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2024523703

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2022946092

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2022946092

Country of ref document: EP

Effective date: 20240531