WO2024021054A1 - 电池的箱体、电池以及用电装置 - Google Patents

电池的箱体、电池以及用电装置 Download PDF

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Publication number
WO2024021054A1
WO2024021054A1 PCT/CN2022/109082 CN2022109082W WO2024021054A1 WO 2024021054 A1 WO2024021054 A1 WO 2024021054A1 CN 2022109082 W CN2022109082 W CN 2022109082W WO 2024021054 A1 WO2024021054 A1 WO 2024021054A1
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WO
WIPO (PCT)
Prior art keywords
battery
load
plate
reinforcing plate
bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/109082
Other languages
English (en)
French (fr)
Inventor
姚鹏程
张文辉
王鹏
陈兴地
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to PCT/CN2022/109082 priority Critical patent/WO2024021054A1/zh
Priority to CN202280006384.0A priority patent/CN116235358B/zh
Priority to EP22952501.9A priority patent/EP4517972A4/en
Priority to CN202320135954.8U priority patent/CN219180684U/zh
Publication of WO2024021054A1 publication Critical patent/WO2024021054A1/zh
Priority to US18/900,085 priority patent/US20250023178A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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
    • 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
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and more specifically, to a battery box, a battery and an electrical device.
  • batteries are widely used in various electrical devices such as vehicles. During the operation of some electrical devices, they are often accompanied by movement or vibration. In this case, how to improve the structural strength of the battery is extremely important.
  • This application provides a battery box, battery and electrical device, which can improve the structural strength of the battery.
  • inventions of the present application provide a battery box.
  • the box includes a load-bearing plate, side beams and reinforcing plates.
  • the load-bearing plate includes a load-bearing area and a connection area, and the load-bearing area is used to place battery cells.
  • the side beams and the load-bearing plate enclose to form a receiving cavity for accommodating battery cells, and the side beams are connected to the connection area. At least part of the reinforcing plate overlaps and is connected to the connecting area in the thickness direction of the carrier plate.
  • the thickness at the connection area is increased, thereby improving the structural strength of the battery at the connection area and reducing the external force at the connection area. There is a risk of deformation or damage due to impact and other factors.
  • the minimum thickness of the reinforcing plate is H, 0.2mm ⁇ H ⁇ 30mm.
  • H is set between 0.2mm and 30mm, which can improve the structural strength of the battery, reduce the risk of battery deformation or damage, and improve the reliability of the battery without having a significant impact on the overall weight of the battery.
  • 0.5mm ⁇ H ⁇ 10mm is one of 0.5mm, 1mm, 5mm, 8mm, and 10mm.
  • the weight of the battery is M, and H and M satisfy: 0.0002mm/kg ⁇ H/M ⁇ 1mm/kg.
  • H/M is set between 0.0002mm/kg and 1mm/kg, which not only ensures that the battery has a high energy density, but also improves the structural strength of the battery and reduces the deformation of the battery under the impact of external forces. or risk of breakage.
  • 0.0006mm/kg ⁇ H/M ⁇ 0.2mm/kg is one of 0.0006mm/kg, 0.003mm/kg, 0.01mm/kg, 0.05mm/kg, and 0.2mm/kg.
  • the minimum thickness H of the reinforcing plate is less than or equal to the minimum thickness of the load-bearing plate.
  • the reinforcing plate is connected to the carrier plate and is used to increase the thickness of the battery at at least part of the carrier plate, thereby improving the structural strength of the battery.
  • the embodiment of the present application also takes into account the lightweight design of the battery, so the thickness H is set to be less than or equal to the minimum thickness of the load-bearing plate, so that the volume of the entire reinforcement plate can bear the volume of the plate, while improving the structural strength as much as possible. Reduce the overall weight of the battery.
  • the reinforcing plate is located on a side of the carrying plate facing away from the accommodation cavity.
  • the reinforcing plate by arranging the reinforcing plate on the side of the bearing plate away from the accommodating cavity, the existence of the reinforcing plate will not occupy the internal space of the accommodating cavity, that is, it will not affect the performance of the battery cells in the accommodating cavity. Take up space, thereby ensuring the energy density of the battery. At the same time, it can also reduce the difficulty of battery preparation, which is conducive to large-scale production and preparation.
  • the load-bearing area at least partially overlaps the stiffening plate in the thickness direction.
  • the load-bearing area and the reinforcing plate at least partially overlap, so that the reinforcing plate can increase the overall thickness of at least part of the load-bearing area, thereby reducing the impact of vibration and reducing debonding between the load-bearing plate and the battery cells. Reduce the risk of problems and improve the reliability of the relative position between the load-bearing plate and the battery cells.
  • the reinforcing plate can also improve the structural strength of at least part of the load-bearing area, thereby reducing the impact of external impact and other factors on the battery cells.
  • the reinforcement panels are connected to the side members.
  • the side beams are connected to the load-bearing plate, and the positions of the two are kept relatively fixed. On this basis, by connecting the reinforcing plate to the side beam, the reinforcing plate and the side beam remain fixed, thereby improving the reliability of the relative position between the reinforcing plate and the load-bearing plate.
  • the reinforcing plate and the side beams can be connected and fixed first, and then the reinforcing plate and the side beams can be installed as a whole on the load-bearing plate to ensure the reliability of the relative position between the reinforcing plate and the side beams.
  • the reinforcing plate can be installed on the load-bearing plate first, and then the side beams can be fixed to the reinforcing plate, so as to improve the reliability of the connection between the load-bearing plate and the side beams through the reinforcing plate.
  • the plurality of side beams are arranged along the circumferential direction of the load-bearing plate, and the reinforcing plate is connected to at least one side beam.
  • multiple side beams are connected end to end in order to form a closed-loop structure, and the multiple side beams are arranged around the outer peripheral side of the accommodation cavity.
  • the reinforcing plate is connected to at least one side beam to improve the reliability of the relative positions between the side beam, the reinforcing plate and the load-bearing plate, thereby ensuring the stability of the overall battery structure under different working conditions.
  • the plurality of side beams include two first side beams and two second side beams, the two first side beams are spaced apart along the width direction of the box, and the two second side beams are along the length of the box.
  • Each second side beam is connected to two first side beams, and there are two reinforcing plates. The two reinforcing plates are spaced apart along the width direction and connected to the two first side beams respectively.
  • two reinforcing plates are provided, and the two reinforcing plates are connected to the two first side beams respectively, so that the connection between the battery cell and the first side beam in the load-bearing plate can be adjusted.
  • Zone has the effect of improving structural strength.
  • a portion of the load-bearing plate is located between the first side beam and the reinforcing plate and is connected to the first side beam and the reinforcing plate.
  • a part of the load-bearing plate can be located between the first side beam and the reinforcing plate at the same time, and the load-bearing plate can simultaneously achieve load-bearing through this part.
  • the connection between the plate, the reinforcing plate and the first side beam Compared with the solution in which the first side beam and the reinforcing plate are installed in a staggered position on the load-bearing plate, this design allows more area on the load-bearing plate to be used to place battery cells, thereby increasing the energy density of the battery.
  • the reinforcing plate is integrally formed with the first side sill.
  • the reinforcing plate and the first side beam are integrally formed, which can improve the connection reliability of the reinforcing plate and the first side beam and reduce the risk of connection failure between the two due to external impact and other factors.
  • the reinforcing plate and the first side beam can be integrally formed first, so that the reinforcing plate and the first side beam are connected to form a whole, and then the whole body formed by the reinforcing plate and the first side beam is connected to the load-bearing structure.
  • the accuracy of the positions of the first side beam, the reinforcing plate and the load-bearing plate can be improved.
  • embodiments of the present application provide a battery, including the box in any of the foregoing embodiments and a battery cell.
  • the battery cell is accommodated in the accommodation cavity and connected to the load-bearing area of the load-bearing plate.
  • the reinforcing plate at least partially overlaps the battery cell in the thickness direction of the carrier plate.
  • the reinforcing plate at least partially overlaps the battery cell, so that the reinforcing plate can also have a structural reinforcement effect on at least part of the area of the battery corresponding to the battery cell, further enhancing the structural strength of the battery. .
  • the plurality of battery cells constitute a battery pack, and a gap is provided between the battery pack and the side beam.
  • the reinforcing plate is at least partially disposed opposite to the gap.
  • the existence of the gap makes the structural strength of the battery at this position insufficient. Therefore, in the embodiment of the present application, the reinforcing plate is at least partially disposed opposite to the gap, thereby improving the structural strength and pressure resistance of the battery at the gap position. ability to reduce the risk of deformation or damage to the gap.
  • the battery further includes a thermal management component for regulating the temperature of the battery cells.
  • the projection of the thermal management component at least partially overlaps the projection of the reinforcing plate.
  • the projection of the thermal management component and the projection of the reinforcing plate are at least partially overlapped, thereby improving the structural strength at this location, reducing the influence of the thermal management component from external impact and other factors, and improving the reliability and safety of the battery. sex.
  • embodiments of the present application provide an electrical device, including the battery in any of the aforementioned embodiments, and the battery is used to provide electrical energy.
  • Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • FIG. 2 is an exploded schematic diagram of a battery provided by some embodiments of the present application.
  • Figure 3 is an exploded schematic diagram of a battery box provided by some embodiments of the present application.
  • Figure 4 is a schematic structural diagram of a carrier plate in a battery provided by some embodiments of the present application.
  • Figure 5 is a partial cross-sectional schematic diagram of a battery provided by some embodiments of the present application.
  • Figure 6 is a partial enlarged view of area Q in Figure 5;
  • Figure 7 is a schematic diagram of the matching structure of the first side beam and the reinforcing plate in the battery provided by some embodiments of the present application.
  • Bearing plate 12. Side beam; 121. First side beam; 122. Second side beam; 13. Reinforcement plate; 14. Accommodation cavity; 15. Base plate;
  • X width direction
  • Y length direction
  • Z thickness direction
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the 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.
  • connection should be understood in a broad sense.
  • connection can be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • connection can be a fixed connection
  • connection can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • connection can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • “Plural” appearing in this application means two or more (including two).
  • battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells or magnesium ion battery cells, etc.
  • the embodiments of the present application are not limited to this.
  • the battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited to this.
  • the battery mentioned in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery or a battery pack.
  • Batteries generally include a box for packaging one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly consists of a positive electrode sheet, a negative electrode sheet and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector.
  • the positive electrode current collector that is not coated with the positive electrode active material layer protrudes from the positive electrode current collector that is coated with the positive electrode active material layer. , the positive electrode current collector without coating the positive electrode active material layer is used as the positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the negative electrode current collector that is not coated with the negative electrode active material layer protrudes from the negative electrode current collector that is coated with the negative electrode active material layer.
  • the negative electrode current collector that is not coated with the negative electrode active material layer is used as the negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon.
  • the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.
  • the material of the separator can be polypropylene (PP) or polyethylene (polyethylene, PE).
  • the electrode assembly may have a rolled structure or a laminated structure, and the embodiments of the present application are not limited thereto.
  • the battery For electrical devices such as vehicles, the battery needs to be fixed at a fixed position of the electrical device.
  • the applicant's research found that the above problem occurs because: inside the battery, the battery cells are fixed to the load-bearing plate of the box, and the battery cells are usually placed in the central area of the load-bearing plate, so the part of the load-bearing plate located in the central area It can form a whole together with the battery cells, thus having high structural strength.
  • the edge area of the load-bearing plate close to the side beam cannot be bonded to the battery cells. This results in a weaker structural strength in the edge areas of the load-bearing plate. Under the action of external impact and other factors, the edge area of the load-bearing plate is more likely to be deformed or damaged than the central area, affecting the normal use of the battery.
  • the box body includes load-bearing plates, side beams and reinforcing plates.
  • the load-bearing plate includes a load-bearing area and a connection area, and the load-bearing area is used to place battery cells.
  • the side beams and the load-bearing plate enclose to form a receiving cavity for accommodating battery cells, and the side beams are connected to the connection area. At least part of the reinforcing plate overlaps and is connected to the connecting area in the thickness direction of the carrier plate.
  • the thickness of the connection area is increased, thereby improving the structural strength of the battery at the connection area and reducing the effects of external impact and other factors at the connection area. Otherwise, there is a risk of deformation or damage.
  • the technical solutions described in the embodiments of this application are applicable to electrical devices using batteries.
  • the electrical devices are, for example, battery cars, electric cars, ships, spacecraft, electric toys, and electric tools, etc., where the spacecraft is, for example, airplanes, rockets, Space shuttles and spaceships, etc.
  • electric toys include fixed or mobile electric toys, specifically, electric car toys, electric ship toys, electric airplane toys, etc.
  • electric tools include, for example, metal cutting power tools, grinding power tools , Assembling power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.
  • the battery cells described in the embodiments of the present application are not limited to the above-described electrical devices. However, for the sake of simplicity, the following embodiments take electric vehicles as examples for description.
  • the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle.
  • the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle, etc.
  • the battery 100 may be disposed inside the vehicle 1000.
  • the battery 100 may be disposed at the bottom, front or rear of the vehicle 1000.
  • the battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may serve as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 may be used to control a battery to power the motor 300 , for example.
  • the battery can be used for starting, navigation, etc. of the vehicle 1000.
  • the battery 100 can also be used to drive the vehicle 1000, replacing or partially replacing fuel or natural gas to drive the vehicle 1000.
  • the battery includes a case 400 and battery cells 20 .
  • the battery cells 20 are accommodated in the accommodation cavity 14 of the case 400 .
  • the battery 100 there may be one battery cell 20 or a plurality of battery cells 20. If there are multiple battery cells 20, the multiple battery cells 20 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 20 are both 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 400; of course, the plurality of battery cells 20 can also be connected in series first. They may be connected in parallel or mixed to form a battery module (not shown in the figure), and multiple battery modules may be connected in series, parallel or mixed to form a whole, and be accommodated in the box 400 .
  • the box includes a load-bearing plate 11 , side beams 12 and reinforcing plates 13 .
  • the load-bearing plate 11 includes a load-bearing area A and a connection area B.
  • the load-bearing area A is used to place the battery cells 20 .
  • the side beams 12 and the load-bearing plate 11 enclose a receiving cavity 14 for accommodating the battery cells 20 .
  • the side beams 12 are connected to the connection area B. At least part of the reinforcing plate 13 overlaps and is connected to the connection area B in the thickness direction Z of the carrier plate 11 .
  • the carrying plate 11 can be used as the bottom plate of the box or as the top plate of the box, which is not limited in the embodiment of the present application.
  • the battery needs to be installed on the chassis of the vehicle.
  • the battery can be installed upside down, and the load-bearing plate 11 and the vehicle chassis can be connected by bolts or other means to achieve mutual fixation between the battery and the vehicle.
  • the embodiment of the present application is described with the load-bearing plate 11 as a part of the battery box, but in actual situations, the load-bearing plate 11 can also be used as a part of the vehicle, that is, the load-bearing plate 11 is prepared as a part of the vehicle chassis.
  • the embodiments of the present application do not limit this.
  • the load-bearing plate 11 and the side beams 12 together form a receiving cavity 14 .
  • the connection methods between the load-bearing plate 11 and the side beams 12 include but are not limited to bonding, welding, bolting, etc.
  • the battery cells 20 are arranged in the accommodation cavity 14 and placed on the carrier plate 11 .
  • the embodiment of the present application does not limit the number of battery cells 20 in the accommodation cavity 14.
  • the number of battery cells 20 may be one or more.
  • the load-bearing plate 11 includes a load-bearing area A and a connection area B.
  • the load-bearing area A and the connection area B of the load-bearing plate 11 can be integrally formed using the same material, or different materials can be used to connect them together through welding or other processes. Embodiments of the present application There are no restrictions on this.
  • the battery cells 20 are arranged in the bearing area A of the bearing plate 11 .
  • the size and shape of the bearing area A depends on the overall structural shape of all the battery cells 20 in the accommodation cavity 14 .
  • the battery cell 20 is bonded to the carrier plate 11.
  • the carrier area A is the area on the carrier plate 11 that needs to be coated with colloid.
  • the orthographic projection of the battery cell 20 on the carrier plate 11 is located in the carrier area A.
  • the battery cell 20 is usually disposed in the center of the receiving cavity 14 , so the load-bearing area A is usually located at the center of the load-bearing plate 11 .
  • the connection area B is located outside the load-bearing area A.
  • the side beam 12 is connected to the connection area B of the load-bearing plate 11.
  • the number of the connection areas B can be one or more. When there are multiple connection areas B, at least one connection area B Connected to the reinforcing plate 13. For example, the number of connection areas B is four, and they are respectively arranged around the bearing area A.
  • the connection between the load-bearing plate 11 and the side beam 12 is fixed.
  • the side beam 12 can be arranged perpendicularly to the load-bearing plate 11, or the angle between the side beam 12 and the load-bearing plate 11 can be set to an acute angle or an obtuse angle according to the actual situation. .
  • the battery cells 20 are arranged corresponding to the carrying area A, and there are no battery cells 20 in the range corresponding to the connection area B in the receiving cavity 14 . Therefore, the portion of the load-bearing plate 11 in the connection area B cannot be integrally connected with the battery cells 20 , resulting in poor structural strength of the load-bearing plate 11 in the connection area B and prone to deformation or damage due to external force.
  • the embodiment of the present application adds a reinforcing plate 13.
  • the reinforcing plate 13 is used to improve the structural strength of the battery at the connection area B.
  • the reinforcing plate 13 is connected to the bearing plate 11 , and the connection method between the bearing plate 11 and the reinforcing plate 13 includes but is not limited to bonding, welding, bolting, etc.
  • the reinforcing plate 13 can be disposed on the side of the bearing plate 11 facing the accommodating cavity 14 , or can be disposed on the side of the bearing plate 11 away from the accommodating cavity 14 , or the reinforcing plate 13 can also be set in a U-shaped structure, so that the reinforcing plate 13 Some of them are located on the side of the load-bearing plate 11 facing the accommodating cavity 14 , and some are located on the side of the load-carrying plate 11 facing away from the accommodating cavity 14 .
  • At least part of the reinforcing plate 13 overlaps the connection area B in the thickness direction Z of the carrier plate 11 .
  • the orthographic projection of the reinforcing plate 13 on the load-bearing plate 11 may be located within the connection area B, may overlap the connection area B, or may cover and exceed the connection area B.
  • the portion of the reinforcing plate 13 that overlaps the connection area B can be integrated with the connection area B of the carrier plate 11, thereby increasing the total thickness at this location, thereby improving the structural strength and deformation resistance of the battery at the connection area B.
  • the number of reinforcing plates 13 may be one or more.
  • the embodiment of the present application does not limit the number of reinforcing plates 13 .
  • the orthographic projection of the reinforcing plate 13 on the load-bearing plate 11 may completely cover the load-bearing plate 11 , or may only overlap with part of the structure of the load-bearing plate 11 .
  • the embodiment of the present application does not limit the material of the reinforcing plate 13 .
  • the reinforcing plate 13 can be made of the same material as the bearing plate 11 , so that an integrated design of the reinforcing plate 13 and the bearing plate 11 can be achieved.
  • the embodiment of the present application does not limit the thickness of the reinforcing plate 13 .
  • the minimum thickness of the reinforcing plate 13 may be greater than, less than, or equal to the minimum thickness of the load-bearing plate 11 .
  • the embodiment of the present application also does not limit the specific position of the reinforcing plate 13 , where the reinforcing plate 13 can be located at a position away from or close to the receiving cavity 14 of the load-bearing plate 11 .
  • the reinforcing plate 13 can also be connected to structures such as the side beams 12.
  • the reinforcing plate 13 is added and the reinforcing plate 13 is at least partially overlapped with the connection area B to increase the thickness of the connection area B, thereby improving the structural strength of the battery at the connection area B and reducing the location of the connection area B. There is a risk of deformation or damage due to external impact and other factors.
  • the box body may also include a base plate 15 spaced apart from the load-bearing plate 11 in the thickness direction Z.
  • the load-bearing plate 11 , the side beams 12 and the base plate 15 jointly surround the accommodating cavity 14 , thereby facing The battery cells 20 play a protective role.
  • the minimum thickness of the reinforcing plate 13 is H, 0.2mm ⁇ H ⁇ 30mm.
  • H is one of 0.2mm, 1mm, 5mm, 10mm, and 30mm.
  • the thickness of the reinforcing plate 13 at different positions may be the same or different.
  • the thickness of the reinforcing plate 13 at different positions may depend on the thickness of the load-bearing plate 11 at different positions. Specifically, when the thickness of the load-bearing plate 11 is uneven, the load-bearing plate 11 has an area with a relatively large thickness or a relatively small thickness. For areas with a relatively large thickness, the thickness of the reinforcing plate 13 at the corresponding position can be made larger; for areas with a relatively small thickness, the thickness of the reinforcing plate 13 at the corresponding position can be made smaller. At different positions of the reinforcing plate 13, the thickness of the reinforcing plate 13 and the sum of the thicknesses of the load-bearing plate 11 are kept consistent, thereby improving the reliability of the battery structure.
  • the thickness of the reinforcing plate 13 can be made consistent everywhere.
  • the minimum thickness of the reinforcing plate 13 is H mentioned in the embodiment of this application refers to the minimum thickness of the reinforcing plate 13 at a specific position.
  • the minimum thickness of the reinforcing plate 13 is H, which is the thickness of the reinforcing plate 13 at any position.
  • the reinforcing plate 13 can improve the structural strength of the battery at the connection area B, and the thickness H is often positively correlated with the structural strength of the battery at the connection area B. If the thickness H is too small, it will have little effect on the thickness of the carrier plate 11 at the connection area B, that is, it will have little effect on the structural strength of the battery at the connection area B, and the battery will still be prone to deformation at the connection area B. There is a risk of damage or damage, which is not conducive to the long-term use of the battery.
  • the increase in thickness often means an increase in weight, which will lead to an increase in the overall weight of the battery.
  • a heavy battery is not conducive to the lightweight design of the vehicle, nor is it conducive to the fixed connection between the battery and the vehicle chassis.
  • the reinforcing plate 13 is disposed in the accommodating cavity 14, the reinforcing plate 13 will occupy too much space if it is too thick, thereby affecting the space that can be occupied by the battery cells 20, resulting in wasted space and low battery energy density.
  • H is set between 0.2mm and 30mm, which can improve the structural strength of the battery, reduce the risk of battery deformation or damage, and improve the reliability of the battery without having a significant impact on the overall weight of the battery.
  • 0.5mm ⁇ H ⁇ 10mm is one of 0.5mm, 1mm, 5mm, 8mm, and 10mm.
  • the weight of the battery is M, and H and M satisfy: 0.0002mm/kg ⁇ H/M ⁇ 1mm/kg.
  • H/M is one of 0.0002mm/kg, 0.002mm/kg, 0.05mm/kg, 0.3mm/kg and 1mm/kg.
  • the “weight M of the battery” mentioned in the embodiment of this application refers to the entire weight including the box, the battery cells 20 and other components located in the accommodation cavity 14 .
  • the weight M of the battery is often positively correlated with the battery capacity.
  • the presence of the reinforcement plate 13 will also affect the weight M of the battery. Therefore, it is necessary to study the relationship between the weight M of the battery and the weight of the reinforcement plate 13. Limitation, that is, the relationship between the weight M of the battery and the minimum thickness H of the reinforcing plate 13 needs to be limited.
  • H/M is too small, it means that relative to the entire battery, the thickness of the reinforcing plate 13 is too small and cannot meet the need to enhance the structural strength of the battery. If H/M is too large, it means that the weight of other structures in the battery except the reinforcement plate 13 is too light. Furthermore, the weight of the battery cells 20 in the accommodation cavity 14 is too light, the battery capacity is too small, and the energy density is too low.
  • the embodiment of the present application sets H/M between 0.0002mm/kg and 1mm/kg, which not only ensures that the battery has a high energy density, but also improves the structural strength of the battery and reduces the deformation or deformation of the battery under the impact of external forces. Risk of breakage.
  • 0.0006mm/kg ⁇ H/M ⁇ 0.2mm/kg is one of 0.0006mm/kg, 0.003mm/kg, 0.01mm/kg, 0.05mm/kg, and 0.2mm/kg.
  • the minimum thickness H of the reinforcing plate 13 is less than or equal to the minimum thickness of the load-bearing plate 11 .
  • the reinforcing plate 13 is connected to the carrier plate 11 and is used to increase the thickness of the battery at at least part of the carrier plate 11, thereby improving the structural strength of the battery.
  • the embodiment of the present application also takes into account the lightweight design of the battery, so the thickness H is set to be less than or equal to the minimum thickness of the load-bearing plate 11, so that the volume of the entire reinforcement plate 13 can support the volume of the plate 11, while improving the structural strength. , to reduce the overall weight of the battery as much as possible.
  • the reinforcing plate 13 and the load-bearing plate 11 are made of the same material. This ensures that the weight of the reinforcing plate 13 is less than the weight of the load-bearing plate 11, which contributes to the lightweight design of the battery.
  • the reinforcing plate 13 is located on the side of the load-bearing plate 11 facing away from the accommodation cavity 14 .
  • the battery cells 20 are connected to the load-bearing plate 11 and located in the accommodating cavity 14, and the reinforcement plate 13 is located on the side of the load-carrying plate 11 away from the accommodating cavity 14. That is, the battery cells 20 and the reinforcement plate 13 are respectively located on both sides of the load-bearing plate 11.
  • the carrier plate 11 separates the battery cells 20 from the reinforcing plate 13 . Since the reinforcing plate 13 is located on the side of the carrying plate 11 away from the accommodating cavity 14, the existence of the reinforcing plate 13 will not occupy the internal space of the accommodating cavity 14, and will not affect the space that the battery cells 20 can occupy in the accommodating cavity 14. , that is, more or larger battery cells 20 can be arranged in the accommodation cavity 14 .
  • the reinforcement plate 13 is located on the side of the load-bearing plate 11 away from the accommodation cavity 14, the battery can be produced according to the traditional preparation process, and then welded or bolted after the production is completed.
  • the reinforcing plate 13 is fixed on the carrying plate 11 to enhance the structural strength of the battery.
  • the reinforcing plate 13 can be directly fixedly installed on the vehicle chassis, and then the battery prepared by traditional processes can be directly fixed on the reinforcing plate 13 located on the chassis to achieve a fixed connection between the vehicle and the battery. No matter which preparation method is used, only one simple additional step is added to the traditional preparation process, thus reducing the difficulty of battery preparation.
  • the reinforcement plate 13 is disposed on the side of the load-bearing plate 11 away from the accommodation cavity 14 , so that the presence of the reinforcement plate 13 does not occupy the internal space of the accommodation cavity 14 , that is, it does not affect the battery cells 20
  • the available space within the accommodation cavity 14 ensures the energy density of the battery. At the same time, it can also reduce the difficulty of battery preparation, which is conducive to large-scale production and preparation.
  • connection area B includes a first portion B1 opposite to the accommodation cavity 14 along the thickness direction Z.
  • the reinforcing plate 13 at least partially overlaps the first portion B1.
  • the "first part B1 opposite to the accommodation cavity 14 along the thickness direction Z" mentioned in the embodiment of the present application means that the part of the accommodation cavity 14 overlapping the connection area B in the orthographic projection on the load-bearing surface is the third part of the connection area B. Part B1.
  • the position outline of the accommodation cavity 14 is shown in the form of a dotted line in the figure. It should be noted that the range framed by the dotted line does not constitute a restriction on the position, shape and size of the accommodation cavity 14 in the embodiment of the present application.
  • the specific details of the accommodation cavity 14 The structure needs to be determined based on the specific structural layout inside the battery.
  • the third Part B1 cannot be connected to the battery cell 20 as a whole through bonding or other methods. Compared with other positions of the load-bearing plate 11 , the first part B1 is more likely to be deformed or damaged under the influence of external forces.
  • the reinforcing plate 13 and the first part B1 are at least partially overlapped.
  • the reinforcing plate 13 and the first part B1 can be connected to form a whole through bonding, welding, bolting, etc., thereby improving the position of the battery in the first part B1.
  • the structural strength and compression resistance of the first part B1 are reduced to reduce the risk of deformation or breakage of the first part B1.
  • connection area B further includes a second part B2, and the second part B2 overlaps and connects the side beam 12 along the thickness direction Z.
  • the second part B2 is located on the side of the first part B1 away from the bearing area A.
  • the first part B1 and the second part B2 may be made of the same material or different materials.
  • the thickness of the first part B1 may be the same as the thickness of the second part B2, or may be different from the thickness of the second part B2, which is not limited in the embodiment of the present application.
  • the first part B1 and the second part B2 have an integrated structure, are made of the same material, and have the same thickness.
  • the second part B2 overlaps the side beam 12 along the thickness direction Z, that is, the orthographic projection of the side beam 12 on the load-bearing plate 11 coincides with the second part B2 of the connection area B.
  • the second part B2 is used to realize the load-bearing plate 11 and the side beam. 12 connections.
  • a plurality of mounting holes can be provided at the position B2 of the second part, and the load-bearing plate 11 and the side beam 12 can be fixed by bolt connection.
  • the second part B2 can be connected with the side beam 12 to form a whole. Therefore, the existence of the side beam 12 can improve the structural strength of the battery at the position of the second part B2 and reduce the risk of the second part B2 being deformed or damaged under the action of external force. Improve overall battery reliability.
  • the reinforcing plate 13 is at least partially overlapped with the first part B1.
  • the reinforcing plate 13 may or may not be provided at the position of the second part B2.
  • There is a reinforcing plate 13 that is, the orthographic projection of the reinforcing plate 13 on the load-bearing plate 11 and the first part B1 can be overlapped or disposed in a staggered manner. The embodiment of the present application does not limit this.
  • the load-bearing area A at least partially overlaps the reinforcing plate 13 .
  • the battery cells 20 are disposed on the load-bearing area A of the load-bearing plate 11 .
  • the presence of the battery cells 20 can enhance the structural strength of the battery in the load-bearing area A.
  • the load-bearing plate 11 will generate vibrations and transmit them to the battery cells 20 to cause them to shake together. After a certain period of time, the colloid between the load-bearing plate 11 and the battery cells 20 will become weak. It is difficult to ensure the reliability of the relative positions of the two.
  • the embodiment of the present application at least partially overlaps the load-bearing area A with the reinforcing plate 13, so that the reinforcing plate 13 can increase the overall thickness of at least part of the load-bearing area A, thereby reducing the impact of vibration and reducing the load on the load-bearing plate.
  • the risk of debonding problems between the carrier plate 11 and the battery cells 20 is reduced, and the reliability of the relative position between the load-bearing plate 11 and the battery cells 20 is improved.
  • the reinforcing plate 13 can also improve the structural strength of at least part of the load-bearing area A, thereby reducing the impact of external impact and other factors on the battery cells 20 .
  • the reinforcement plate 13 is connected to the side sill 12 .
  • the side beams 12 are connected to the load-bearing plate 11, and their positions remain relatively fixed. On this basis, by connecting the reinforcing plate 13 to the side beam 12 so that the reinforcing plate 13 and the side beam 12 remain fixed, the reliability of the relative position between the reinforcing plate 13 and the load-bearing plate 11 can be improved.
  • the connection method between the reinforcing plate 13 and the side beam 12 includes but is not limited to welding, bonding, bolting, etc.
  • the embodiment of the present application does not limit the specific connection position between the reinforcing plate 13 and the side beam 12 .
  • the reinforcing plate 13 can be disposed on the surface of the load-bearing plate 11 facing the side beam 12 , and then the reinforcing plate 13 is fixed to the bottom of the side beam 12 .
  • the reinforcing plate 13 can also be configured as an L-shaped structure.
  • the reinforcing plate 13 includes two vertically arranged parts, one of which is located on the side of the load-bearing plate 11 facing away from the side beams 12 , and the other part is located on the side of the side beams 12 facing away from the side beams 12 .
  • One side of the accommodation cavity 14 is fixedly connected to the side beam 12 .
  • the reinforcing plate 13 and the side beams 12 can be connected and fixed first, and then the reinforcing plate 13 and the side beams 12 are installed as a whole on the load-bearing plate 11 to ensure that the reinforcing plate 13 and the side beams 12 are connected.
  • the relative position between them is reliable.
  • the reinforcing plate 13 can be installed on the load-bearing plate 11 first, and then the side beams 12 can be fixed to the reinforcing plate 13 to improve the reliability of the connection between the load-carrying plate 11 and the side beam 12 through the reinforcing plate 13 .
  • FIG. 2 , FIG. 3 and FIG. 7 there are multiple side beams 12 , the plurality of side beams 12 are arranged along the circumferential direction of the load-bearing plate 11 , and the reinforcing plate 13 is connected to at least one side beam 12 .
  • a plurality of side beams 12 and the load-bearing plate 11 together form a receiving cavity 14.
  • the number of side beams 12 is four.
  • the four side beams 12 are connected end to end and together form a square ring structure.
  • Adjacent side beams 12 can be connected by welding, bonding, bolting, etc., and among the plurality of side beams 12, only some of the side beams 12 can be fixedly connected to the load-bearing plate 11, or all of the side beams 12 can be connected to the load-bearing plate 11.
  • the board 11 is fixedly connected, and the embodiment of the present application does not limit this.
  • the number of reinforcing plates 13 may be one or multiple, and at least one reinforcing plate 13 is connected and fixed to at least one side beam 12 .
  • the number of reinforcing plates 13 corresponds to the number of side beams 12.
  • the plurality of reinforcing plates 13 are also arranged along the circumferential direction of the load-bearing plate 11.
  • the multiple reinforcing plates 13 correspond to the positions of the multiple side beams 12 and have a corresponding relationship.
  • the reinforcing plate 13 and the side beam 12 are connected to each other.
  • the plurality of side beams 12 are connected end to end in order to form a closed-loop structure, and the plurality of side beams 12 are arranged around the outer peripheral side of the accommodation cavity 14 .
  • the reinforcing plate 13 is connected to at least one side beam 12 to improve the reliability of the relative positions between the side beam 12, the reinforcing plate 13 and the load-bearing plate 11, thereby ensuring the stability of the overall battery structure under different working conditions.
  • the plurality of side beams 12 include two first side beams 121 and two second side beams 122, and the two first side beams 121 are arranged along the width direction X, The two second side beams 122 are arranged along the length direction Y, and the width direction X intersects the length direction Y.
  • Each second side beam 122 is connected to two first side beams 121, and there are two reinforcing plates 13. The two reinforcing plates 13 are spaced apart along the width direction X and connected to the two first side beams 121 respectively.
  • the second side beams 122 are used to connect and fix two spaced apart first side beams 121 .
  • the two first side beams 121 are spaced along the width direction X and both extend along the length direction Y.
  • the two second side beams 122 are arranged along the length direction Y.
  • the length directions Y are spaced apart and all extend along the width direction X.
  • the width direction X and the length direction Y are arranged perpendicularly.
  • the accommodation cavity 14 also includes a thermal management component 30.
  • the thermal management component 30 is used to adjust the temperature of the battery cells 20 inside the battery to ensure that the battery cells 20 Ability to maintain appropriate temperature for work.
  • the thermal management component 30 includes a heat exchange plate 31 and a manifold 32 for connecting a plurality of heat exchange plates 31 .
  • the heat exchange plate 31 is attached to or adjacent to the battery cell 20 and is the main component used to adjust the temperature of the battery cell 20.
  • the thermal fluid can be delivered to the heat exchange plate 31 , and the thermal fluid flows in the channel and provides part of the heat to the corresponding battery cell 20 , thereby realizing the warming operation.
  • the manifold 32 is connected with the channels of the heat exchange plates 31 and is used to transport or transfer hot and cold fluids to one or more heat exchange plates 31 .
  • the manifold 32 is usually located between the battery cell 20 and the first side beam 121. Due to the existence of the manifold 32, the distance between the battery cell 20 and the first side beam 121 is too large, thereby reducing the width of the connection area B. If the battery is too large, the battery may be easily deformed or damaged at the connection area B between the battery cell 20 and the first side beam 121 .
  • connection area B between 121 has the effect of improving the structural strength.
  • the two reinforcing plates 13 in the embodiment of the present application are two small plates arranged at intervals, that is, the orthographic projection of the two reinforcing plates 13 on the load-bearing plate 11 will only overlap with part of the structure of the load-bearing plate 11 .
  • this design can improve the structural strength of the battery while reducing the overall weight of the reinforcing plate 13, thus facilitating the lightweight design of the battery.
  • the embodiment of the present application does not limit the size of the two reinforcing plates 13 and the distance between them.
  • the orthographic projection of the two reinforcing plates 13 on the load-bearing plate 11 coincides with the first part B1
  • the distance between the two reinforcing plates 13 is the width direction X of the load-bearing area A. size of.
  • the reinforcing plate 13 has a support area C that overlaps with the thickness direction Z of the load-bearing plate 11 .
  • the support area C overlaps with the thickness direction Z of the load-bearing plate 11 means: the portion of the reinforcement plate 13 on the load-bearing plate 11 that overlaps with the load-bearing plate 11 is the support area of the reinforcement plate 13 C.
  • the support area C in the reinforcement plate 13 is mainly used to improve the structural strength at a specific position in the load-bearing plate 11 .
  • the reinforcing plate 13 may all be the support area C, or may include other parts except the support area C.
  • the reinforcing plate 13 may all be the support area C, or may include other parts except the support area C.
  • FIGS. 3 and 7 when all the reinforcing plates 13 are located on the side of the bearing plate 11 away from the accommodation cavity 14 , and all orthographic projections of the reinforcing plates 13 on the bearing plate 11 are located outside the bearing plate 11 When inside the contour, the entire reinforcing plate 13 is the support area C.
  • the part of the reinforcing plate 13 located on the side of the load-bearing plate 11 away from the accommodating cavity 14 is the support area C
  • the part of the reinforcing plate 13 located on the side of the side beam 12 away from the accommodating cavity 14 is the support area C.
  • the portion on one side of the cavity 14 is the other portion of the reinforcing plate 13 except the support area C.
  • a part of the load-bearing plate 11 is located between the first side beam 121 and the reinforcing plate 13 and is connected to the first side beam 121 and the reinforcing plate 13 .
  • the "part of the load-bearing plate 11 is located between the first side beam 121 and the reinforcing plate 13" mentioned in the embodiment of the present application means that part of the structure in the load-bearing plate 11 is located at the first position in the thickness direction Z of the load-bearing plate 11 Between the side beam 121 and the reinforcing plate 13 , that is, the orthographic projections of the first side beam 121 and the reinforcing plate 13 on the load-bearing plate 11 at least partially overlap.
  • the load-bearing plate 11 separates the first side beam 121 and the reinforcing plate 13, and the load-bearing plate 11 has two opposite surfaces in the thickness direction Z, one of which faces the side beam 12 and can be welded or bonded. Realize the fixation with the side beam 12.
  • the other surface is arranged toward the reinforcing plate 13, and can also be fixed to the reinforcing plate 13 by welding or bonding.
  • the embodiment of the present application controls the relative positional relationship between the first side beam 121 and the reinforcing plate 13 so that a part of the load-bearing plate 11 can be located between the first side beam 121 and the reinforcing plate 13 at the same time, and the load-bearing plate 11 can pass through this part.
  • the connection between the load-bearing plate 11, the reinforcing plate 13 and the first side beam 121 is realized at the same time.
  • this design allows more area on the load-bearing plate 11 to be used to place the battery cells 20 , thereby increasing the energy density of the battery. .
  • the reinforcing plate 13 and the first side beam 121 are integrally formed.
  • the reinforcing plate 13 and the first side beam 121 are integrally formed, which can improve the connection reliability of the reinforcing plate 13 and the first side beam 121 and reduce the risk of connection failure between the two due to external impact and other factors. And during the battery preparation process, the reinforcing plate 13 and the first side beam 121 can be integrally formed first, so that the reinforcing plate 13 and the first side beam 121 are connected as a whole, and then the reinforcing plate 13 and the first side beam 121 are connected together. The whole structure is connected at a specific position of the load-bearing plate 11 , thereby improving the position accuracy of the first side beam 121 , the reinforcing plate 13 and the load-bearing plate 11 .
  • the reinforcing plate 13 and the first side beam 121 can be made of the same material, and the load-bearing plate 11 can be made of the same or different material as the first side beam 121.
  • This application The embodiment does not limit this.
  • the material of the reinforcing plate 13 includes at least one of steel and aluminum alloy.
  • Both steel and aluminum alloy are materials with strong structural strength, and compared with other materials, steel and aluminum alloy can greatly reduce the overall weight of the reinforcing plate 13 while ensuring the structural strength, thereby reducing the The overall weight of the battery contributes to the lightweight design of the battery.
  • the battery includes the box and battery cells 20 in any of the previous embodiments.
  • the battery cells 20 are accommodated in the accommodation cavity 14 and Connected to the bearing area A of the bearing plate 11 .
  • the battery provided by the embodiments of the present application can have the beneficial effects of the box in any of the aforementioned embodiments.
  • the beneficial effects of the box please refer to the aforementioned description of the beneficial effects of the box, and the embodiments of the present application will not be repeated here.
  • the battery cells 20 are bonded to the load-bearing area A.
  • a colloid is disposed between the battery cell 20 and the carrier plate 11 .
  • the area where the colloid is coated on the carrier plate 11 is usually the carrier area A of the carrier plate 11 .
  • the colloid is used to achieve fixation between the battery cells 20 and the carrier plate 11 , and during the bonding process, some colloid usually overflows from both sides of the battery and fills the area between the battery cells 20 and the side beams 12 , this part of the colloid can achieve bonding and fixation between the battery cells 20 and the side beams 12 to a certain extent, thereby improving the reliability of the battery structure.
  • the reinforcing plate 13 at least partially overlaps the battery cells 20 in the thickness direction Z of the carrier plate 11 .
  • the reinforcement plate 13 and the battery cell 20 at least partially overlap means that the orthographic projection of the reinforcement plate 13 on the carrier plate 11 and the orthographic projection of the battery cell 20 on the carrier plate 11 exist at least partially. overlap.
  • the reinforcing plate 13 is used to enhance the structural strength of the battery at the connection area B, that is, to enhance the structural strength of the area between the battery cell 20 and the side beam 12 .
  • the embodiment of the present application also at least partially overlaps the reinforcing plate 13 with the battery cell 20 , so that the reinforcing plate 13 can also structurally strengthen at least part of the area in the battery corresponding to the battery cell 20 . The effect further enhances the structural strength of the battery.
  • the plurality of battery cells 20 constitute a battery pack, and a gap is provided between the battery pack and the side beam 12 .
  • the reinforcing plate 13 is disposed opposite to the gap.
  • a plurality of battery cells 20 are connected in series, parallel or mixedly to form a battery pack. Normally, the battery pack is spaced apart from the side beams 12 to form a gap for avoiding the internal components of the battery.
  • At least part of the reinforcing plate 13 is arranged opposite to the gap” mentioned in the embodiment of the present application refers to the orthographic projection of the area where the gap is located on the load-bearing plate 11 and the position of the reinforcing plate 13 on the load-bearing plate 11 Orthographic projections on at least partially overlap.
  • the gap corresponds to the first part B1 of the bearing plate 11 .
  • the embodiment of the present application does not limit the number and specific shape and size of the gaps.
  • the number of gaps is four, and they are provided around the periphery of the battery pack.
  • the existence of the gap makes the structural strength of the battery at this position insufficient. Therefore, in the embodiment of the present application, at least part of the reinforcing plate 13 is arranged opposite to the gap, thereby improving the structural strength and pressure resistance of the battery at the gap position and reducing the occurrence of gaps. Risk of deformation or breakage problems.
  • the battery further includes a thermal management component 30 for regulating the temperature of the battery cell 20 .
  • the projection of the thermal management component 30 at least partially overlaps the projection of the reinforcing plate 13 .
  • the battery pack is spaced apart from the side beams 12 to form a gap for avoiding internal components of the battery.
  • the thermal management component 30 includes a plurality of heat exchange tubes and a manifold 32 connecting the plurality of heat exchange tubes.
  • the manifold 32 is located in the gap between the battery pack and the side beam 12 .
  • the number of manifolds 32 may be the same as the number of gaps, or may be different from the number of gaps, that is, no manifolds 32 may be provided in some gaps.
  • the specific structure needs to be determined according to the actual situation of the battery. This is the case in the embodiment of the present application. No restrictions.
  • the thermal management component 30 is at least partially located in the gap. If the structural strength of the battery is insufficient at the position corresponding to the gap, under the influence of external impact and other factors, the deformation or damage of the load-bearing plate 11 will easily have an adverse effect on the thermal management component 30, resulting in battery failure. The overall temperature regulation effect is reduced, which may easily cause safety hazards.
  • the projection of the thermal management component 30 and the projection of the reinforcing plate 13 are at least partially overlapped, thereby improving the structural strength at this location, reducing the influence of the thermal management component 30 from external impact and other factors, and improving the reliability of the battery. and security.
  • embodiments of the present application provide an electrical device, including the battery in any of the aforementioned embodiments, and the battery is used to provide electrical energy.
  • the electrical device provided by the embodiments of the present application has the beneficial effects of the battery in any of the foregoing embodiments.
  • the beneficial effects of the battery please refer to the foregoing description of the beneficial effects of the battery, which will not be described again in the embodiments of the present application.
  • the battery includes a box body, a battery cell 20 and a thermal management component 30 located in the box body.
  • the box body includes a load-bearing plate 11, side beams 12 and reinforcement plates. 13.
  • the side beams 12 and the load-bearing plate 11 enclose a receiving cavity 14 for accommodating multiple battery cells 20 and thermal management components 30.
  • the load-bearing plate 11 includes a load-bearing area A and a connection area B.
  • the connection area B includes the first part B1.
  • the second part B2 is located on the side of the first part B1 away from the load-bearing area A, and the side beam 12 is connected to the second part B2.
  • a plurality of 20 battery cells together form a battery pack.
  • the battery pack is bonded to the load-bearing area A of the load-bearing plate 11.
  • the thermal management component 30 is at least partially located in the gap.
  • the gap is on the load-bearing plate.
  • the orthographic projection on 11 overlaps the first part B1.
  • the number of reinforcing plates 13 is two.
  • the two reinforcing plates 13 are spaced apart in the width direction X, and the orthographic projection of the reinforcing plates on the bearing plate 11 at least partially overlaps the first part B1.

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Abstract

本申请实施例提供一种电池的箱体、电池及用电装置，箱体包括承载板、侧梁以及加强板。承载板包括承载区和连接区，承载区用于放置电池单体。侧梁和承载板围合形成用于容纳电池单体的容纳腔，侧梁连接于连接区。加强板的至少部分在承载板的厚度方向上与连接区重叠并连接于连接区。本申请实施例通过增设加强板，并将加强板与连接区至少部分重叠设置，提高连接区位置处的厚度，从而提高电池在连接区处的结构强度，降低连接区位置处在外力冲击等因素的作用下，发生形变或破损的风险。

Description

电池的箱体、电池以及用电装置 技术领域
本申请涉及电池技术领域，并且更具体地，涉及一种电池的箱体、电池及用电装置。
背景技术
目前，电池广泛应用于例如车辆等多种用电装置中，在部分用电装置工作过程中，往往伴随有移动或振动的情况。在这种情况下，如何提高电池的结构强度显得极为重要。
发明内容
本申请提供了一种电池的箱体、电池及用电装置，其能提高电池的结构强度。
第一方面，本申请实施例提供了一种电池的箱体，箱体包括承载板、侧梁以及加强板。承载板包括承载区和连接区，承载区用于放置电池单体。侧梁和承载板围合形成用于容纳电池单体的容纳腔，侧梁连接于连接区。加强板的至少部分在承载板的厚度方向上与连接区重叠并连接于连接区。
在本申请实施例中，通过增设加强板，并将加强板与连接区至少部分重叠设置，提高连接区位置处的厚度，从而提高电池在连接区处的结构强度，降低连接区位置处在外力冲击等因素的作用下，发生形变或破损的风险。
在一些实施例中，加强板的最小厚度为H，0.2mm≤H≤30mm。
在本申请实施例中，H设置在0.2mm至30mm之间，在对电池整体重量影响不大的前提下，能够提高电池的结构强度，电池发生形变或破损的风险，提高电池的使用可靠性。可选地，0.5mm≤H≤10mm。示例性地，H为0.5mm、1mm、5mm、8mm以及10mm中的一者。
在一些实施例中，电池的重量为M，H和M满足:0.0002mm/kg≤H/M≤1mm/kg。
在本申请实施例中，H/M设置在0.0002mm/kg至1mm/kg之间，在确保电池具有较高能量密度的同时，提高电池的结构强度，降低电池在外力冲击作用下，出现变形或破损的风险。可选地，0.0006mm/kg≤H/M≤0.2mm/kg。示例性地，H/M为0.0006mm/kg、0.003mm/kg、0.01mm/kg、0.05mm/kg以及0.2mm/kg中的一者。
在一些实施例中，加强板的最小厚度H小于或等于承载板的最小厚度。
在本申请实施例中，加强板连接于承载板上，用于增大电池在承载板至少部分位置处的厚度，从而提高电池的结构强度。同时本申请实施例还考虑到电池的轻量化设计，因此将厚度H设置为小于或等于承载板的最小厚度，以使整个加强板的体积承载板的体积，在提高结构强度的同时，尽可能降低电池的整体重量。
在一些实施例中，加强板位于承载板背离容纳腔的一侧。
在本申请实施例中，通过将加强板设置在承载板背离容纳腔的一侧，使得加强板的存在不会占用容纳腔的内部空间，即不会影响到电池单体在容纳腔内的可占用空间，从而确保电池的能量密度。同时还可以降低电池的制备难度，有利于大规模生产制备。
在一些实施例中，在厚度方向上，承载区与加强板至少部分地重叠。
在本申请实施例中，承载区与加强板至少部分地重叠，使得加强板能够提高承载区至少部分位置处的整体厚度，从而能够减小振动影响，降低承载板与电池单体之间发生脱胶问题的风险，提高承载板与电池单体之间相对位置的可靠性。同时加强板还可以提高承载区至少部分位置处的结构强度，从而降低外部冲击等因素对电池单体的影响。
在一些实施例中，加强板连接于侧梁。
在本申请实施例中，侧梁与承载板相连接，两者位置保持相对固定。在此基础上，通过将加强板连接于侧梁，使得加强板与侧梁保持固定，从而能够提高加强板与承载板之间相对位置的可靠性。
此外，在电池制备过程中，可以先将加强板与侧梁连接固定，然后把加强板与侧梁作为一个整体安装在承载板上，以确保加强板与侧梁之间相对位置的可靠。或者也可以先将加强板安装在承载板上，然后将侧梁固定与加强板上，通过加强板提高承载板与侧梁之间连接的可靠性。
在一些实施例中，侧梁为多个，多个侧梁沿承载板的周向设置，加强板与至少一个侧梁连接。
在本申请实施例中，多个侧梁依次首尾相接以形成闭环结构，多个侧梁围设在容纳腔的外周侧。同时加强板与至少一者侧梁连接，以提高侧梁、加强板以及承载板三者间相对位置的可靠性，从而能够在不同工况条件下，保证电池整体结构稳定。
在一些实施例中，多个侧梁包括两个第一侧梁和两个第二侧梁，两个第一侧梁沿箱体宽度方向间隔设置，两个第二侧梁沿箱体的长度方向间隔设置。各第二侧梁连接两个第一侧梁，加强板为两个，两个加强板沿宽度方向间隔设置并分别连接于两个第一侧梁。
在本申请实施例中，加强板设置为两个，并使两个加强板分别连接于两个第一侧梁，从而能够对承载板中对应于电池单体与第一侧梁之间的连接区起到提高结构强度的效果。
在一些实施例中，承载板的一部分位于第一侧梁和加强板之间，并连接于第一侧梁和加强板。
在本申请实施例中，通过控制第一侧梁与加强板之间的相对位置关系，使得承载板的一部分能够同时位于第一侧梁和加强板之间，承载板通过该部分能够同时实现承载板、加强板以及第一侧梁三者之间的连接。与第一侧梁和加强板在承载板上错位安装的方案相比，这种设计能够使得承载板上可以有更多区域用于放置电池单体，从而提高电池的能量密度。
在一些实施例中，加强板与第一侧梁一体成型。
在本申请实施例中，加强板与第一侧梁一体成型，可以提高加强板与第一侧梁的连接可靠性，降低两者因外部冲击等因素的影响，出现连接失效的风险。并且在电池制备过程中，可以先将加强板与第一侧梁一体成型，使得加强板与第一侧梁连接成为一个整体，然后再将加强板与第一侧 梁所构成的整体连接在承载板的特定位置处，从而能够提高第一侧梁、加强板以及承载板三者位置的精度。
第二方面，本申请实施例提供了一种电池，包括前述任一实施方式中的箱体以及电池单体，电池单体容纳于容纳腔并连接于承载板的承载区。
在一些实施例中，在承载板的厚度方向上，加强板与电池单体至少部分地重叠。
在本申请实施例中，加强板与电池单体至少部分地重叠，使得加强板同时还可以对电池中对应与电池单体所在的至少部分区域起到结构增强的效果，进一步增强电池的结构强度。
在一些实施例中，电池单体为多个，多个电池单体构成电池组，电池组与侧梁之间设有间隙。在厚度方向上，加强板至少部分与间隙相对设置。
在本申请实施例中，间隙的存在使得电池在该位置处的结构强度不足，因此本申请实施例将加强板至少部分与间隙相对设置，从而能够提高电池在间隙位置处的结构强度以及抗压能力，降低间隙发生变形或破损问题的风险。
在一些实施例中，电池还包括热管理部件，热管理部件用于调节电池单体的温度。在厚度方向上，热管理部件的投影与加强板的投影至少部分交叠。
在本申请实施例中，热管理部件的投影与加强板的投影至少部分重叠设置，从而提高该位置处的结构强度，降低热管理部件受到外部冲击等因素的影响，提高电池的可靠性以及安全性。
第三方面，本申请实施例提供了一种用电装置，包括前述任一实施方式中的电池，电池用于提供电能。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造 性劳动的前提下，还可以根据附图获得其他的附图。
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的爆炸示意图；
图3为本申请一些实施例提供的电池的箱体的爆炸示意图；
图4为本申请一些实施例提供的电池中承载板的结构示意图；
图5为本申请一些实施例提供的电池的局部剖面示意图；
图6是图5中区域Q的局部放大图；
图7是本申请一些实施例提供的电池中第一侧梁和加强板的配合结构示意图。
在附图中，附图并未按照实际的比例绘制。
附图中：
1000、车辆；
100、电池；200、控制器；300、马达；400、箱体；
11、承载板；12、侧梁；121、第一侧梁；122、第二侧梁；13、加强板；14、容纳腔；15、基板；
20、电池单体；
30、热管理部件；31、换热板；32、汇流管；
A、承载区；B、连接区；B1、第一部分；B2、第二部分；C、支撑区；
X、宽度方向；Y、长度方向；Z、厚度方向。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本申请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；本申请中在申请的说明书 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。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“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。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“附接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；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。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中的具体含义。
本申请中术语“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，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请中，电池单体可以包括锂离子二次电池单体、锂离子一次电池单体、锂硫电池单体、钠锂离子电池单体、钠离子电池单体或镁离子电池单体等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供 更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
电池单体包括电极组件和电解液，电极组件由正极片、负极片和隔离膜组成。电池单体主要依靠金属离子在正极片和负极片之间移动来工作。正极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面，未涂敷正极活性物质层的正极集流体凸出于已涂覆正极活性物质层的正极集流体，未涂敷正极活性物质层的正极集流体作为正极极耳。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面，未涂敷负极活性物质层的负极集流体凸出于已涂覆负极活性物质层的负极集流体，未涂敷负极活性物质层的负极集流体作为负极极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。隔膜的材质可以为聚丙烯(Polypropylene，PP)或聚乙烯(polyethylene，PE)等。此外，电极组件可以是卷绕式结构，也可以是叠片式结构，本申请实施例并不限于此。
对于例如车辆等用电装置来说，电池需要固定在用电装置的固定位置处。申请人注意到，在用电装置长期使用过程中，电池的箱体容易出现变形，影响电池的正常使用，引发安全风险。
申请人研究发现，上述问题的发生是由于：在电池内部，电池单体会与箱体的承载板固定，而电池单体通常设置在承载板的中央区域，因此承载板中位于中央区域的部分能够与电池单体共同形成一个整体，从而具有较高的结构强度。
但是由于电池内部结构的限制，电池单体与侧梁之间会存在一定的空间，以容纳电池的其它功能性部件。进一步地，承载板的靠近侧梁的边缘区域无法实现与电池单体的粘接。因此导致承载板中边缘区域处的结构强度较弱。在外力冲击等因素的作用下，承载板的边缘区域处相对于中央 区域更容易发生形变或损坏，影响电池的正常使用。
基于申请人发现的上述问题，本申请提供了一种电池的箱体、电池及用电装置。箱体包括承载板、侧梁以及加强板。承载板包括承载区和连接区，承载区用于放置电池单体。侧梁和承载板围合形成用于容纳电池单体的容纳腔，侧梁连接于连接区。加强板的至少部分在承载板的厚度方向上与连接区重叠并连接于连接区。
本申请通过增设加强板，并将加强板与连接区至少部分重叠设置，提高连接区位置处的厚度，从而提高电池在连接区处的结构强度，降低连接区位置处在外力冲击等因素的作用下，发生形变或破损的风险。
本申请实施例描述的技术方案适用于使用电池的用电装置，用电装置例如是电瓶车、电动汽车、轮船、航天器、电动玩具和电动工具等等，其中，航天器例如是飞机、火箭、航天飞机和宇宙飞船等等，电动玩具例如包括固定式或移动式的电动玩具，具体例如，电动汽车玩具、电动轮船玩具和电动飞机玩具等等，电动工具例如包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，具体例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨。
本申请实施例描述的电池单体不仅仅局限适用于上述所描述的用电装置，但为描述简洁，下述实施例均以电动汽车为例进行说明。
请参阅图1，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的内部可以设置电池100，具体例如，在车辆1000的底部或车头或车尾可以设置电池100。电池100可以用于车辆1000的供电，例如，电池100可以作为车辆1000的操作电源。车辆1000还可以包括控制器200和马达300，控制器200例如用来控制电池为马达300的供电。电池可以用于车辆1000的启动、导航等，当然，电池100也可以用于驱动车辆1000行驶，替代或部分地替代燃油或天然气为车辆1000提供驱动。
请参阅图2，电池包括箱体400和电池单体20，电池单体20容纳于箱体400的容纳腔14内。
在电池100中，电池单体20可以是一个，也可以是多个。若电池单 体20为多个，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400内；当然，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(图中未示出)，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400内。
以下结合附图对箱体400的结构进行详细阐述。
本申请实施例提供了一种电池的箱体，请参阅图2至图4，箱体包括承载板11、侧梁12以及加强板13。承载板11包括承载区A和连接区B，承载区A用于放置电池单体20。侧梁12和承载板11围合形成用于容纳电池单体20的容纳腔14，侧梁12连接于连接区B。加强板13的至少部分在承载板11的厚度方向Z上与连接区B重叠并连接于连接区B。
承载板11可作为箱体的底板，也可以作为箱体的顶板，本申请实施例不作限制。示例性地，在车辆中，电池需安装于车辆的底盘，可以将电池倒置安装，并将承载板11与车辆底盘通过螺栓连接等方式连接，以此来实现电池与车辆之间的相互固定。
需要说明的是，本申请实施例以承载板11作为电池箱体的一部分进行描述，而在实际情况下，承载板11同样可以作为车辆的一部分，即承载板11作为车辆底盘的一部分进行制备，本申请实施例对此不作限制。
承载板11与侧梁12共同围合形成容纳腔14。承载板11和侧梁12之间的连接方式包括但不限于粘接、焊接以及螺栓连接等。电池单体20设置在容纳腔14内并放置于承载板11。其中，对于容纳腔14内电池单体20的数量，本申请实施例不作限制，电池单体20的数量可以为一个或者多个。
承载板11包括承载区A和连接区B，承载板11的承载区A和承载板11的连接区B可以采用相同材料一体形成，也可以采用不同材料通过焊接等工艺连接一体，本申请实施例对此不作限制。
电池单体20设置在承载板11的承载区A，对于承载区A的尺寸形状，取决于容纳腔14内全部电池单体20所组成的整体的结构形状。示例性地，电池单体20粘接在承载板11上，承载区A为承载板11上需要涂布 胶体的区域，电池单体20在承载板11的正投影位于承载区A内。
示例性地，电池单体20通常设置在容纳腔14中央，因此承载区A通常位于承载板11的中央位置。连接区B位于承载区A的外侧，侧梁12连接于承载板11的连接区B，连接区B的数量可以为一个或多个，当连接区B设置有多个时，至少一个连接区B与及加强板13连接。示例性地，连接区B的数量为四个，并分别设置于承载区A的四周。
承载板11与侧梁12的连接固定，其中，侧梁12可以与承载板11呈垂直设置，也可以根据实际情况，将侧梁12与承载板11之间的夹角设置为锐角或是钝角。
电池单体20对应设置于承载区A，而容纳腔14中对应于连接区B的范围内不存在有电池单体20。因此承载板11在连接区B的部分无法与电池单体20连接一体，从而导致承载板11在连接区B的结构强度较差，容易在外力作用下出现变形或破损问题。
在此基础上，本申请实施例增设了加强板13，加强板13用于提高电池在连接区B位置处的结构强度。具体地说，加强板13连接于承载板11，承载板11与加强板13之间的连接方式包括但不限于粘接、焊接以及螺栓连接等。加强板13可以设置于承载板11朝向容纳腔14的一侧，也可以设置于承载板11背离容纳腔14的一侧，或者也可以将加强板13设置为U形结构，以使加强板13的部分位于承载板11朝向容纳腔14的一侧，部分位于承载板11背离容纳腔14的一侧。
加强板13的至少部分在承载板11的厚度方向Z上与连接区B重叠。加强板13在承载板11的正投影可以位于连接区B内，也可以与连接区B重合，或者也可以覆盖并超出连接区B。加强板13中与连接区B重叠的部分能够与承载板11的连接区B连接一体，从而提高该位置处的总厚度，以此能够提高电池在连接区B处的结构强度以及抗形变能力。
加强板13的数量可以为一个或多个，对于加强板13的数量，本申请实施例不作限制。并且加强板13在承载板11的正投影可以完全覆盖承载板11，也可以仅与承载板11的部分结构重叠。并且对于加强板13的材料，本申请实施例也不作限制。可选地，加强板13可以采用与承载板11 相同的材料制成，从而可以实现加强板13与承载板11的一体式设计。
对于加强板13的厚度，本申请实施例不作限制。加强板13的最小厚度可以大于、小于或者等于承载板11的最小厚度。对于加强板13的具体位置，本申请实施例同样不作限制，其中加强板13可以位于承载板11背离或靠近容纳腔14的位置。并且加强板13除了连接于连接区B外，还可以连接于侧梁12等结构。
本申请实施例通过增设加强板13，并将加强板13与连接区B至少部分重叠设置，提高连接区B位置处的厚度，从而提高电池在连接区B处的结构强度，降低连接区B位置处在外力冲击等因素的作用下，发生形变或破损的风险。
需要说明的是，箱体还可以包括在厚度方向Z上与承载板11间隔设置的基板15，承载板11、侧梁12以及基板15共同将容纳腔14包围，从而对位于容纳腔14内的电池单体20起到保护作用。
在一些实施例中，请参阅图4至图6，加强板13的最小厚度为H，0.2mm≤H≤30mm。示例性地，H为0.2mm、1mm、5mm、10mm以及30mm中的一者。
加强板13在不同位置处的厚度可以相同，也可以不同。示例性地，加强板13在不同位置处的厚度可以取决于承载板11在不同位置处的厚度。具体地说，当承载板11的厚度不均时，承载板11存在有厚度偏大或厚度偏小的区域。对于厚度偏大的区域来说，可以将对应位置处的加强板13厚度做大；对于厚度偏小的区域来说，可以将对应位置处的加强板13厚度做小。以在加强板13的不同位置处，使得加强板13的厚度与承载板11的厚度之和保持一致，从而提高电池结构的可靠性。
而当承载板11各处厚度保持一致时，可替代地，也可以将加强板13各处厚度做成一致。需要说明的是，本申请实施例提到的“加强板13的最小厚度为H”指的是，加强板13特定位置处的最小板厚。当加强板13各处的厚度保持一致时，加强板13的最小厚度为H即为加强板13任意位置处的板厚。
加强板13能够提高电池在连接区B处的结构强度，而厚度H往往与 电池在连接区B处的结构强度呈正相关。若厚度H过小，则其对承载板11在连接区B位置处的厚度影响不大，即对电池在连接区B处的结构强度影响不大，电池在连接区B位置处仍容易出现形变或破损的风险，不利于电池的长期使用。
而若厚度H过大，虽然可以有效提高电池在连接区B位置处的结构强度，但是厚度的增加往往意味着重量的增加，因此会导致电池整体重量加大。而大重量的电池不利于车辆的轻便化设计，也不利于电池与车辆底盘之间的固定连接。此外，加强板13若设置在容纳腔14内，加强板13过厚会导致其占用空间过大，从而影响电池单体20的可占用空间，造成空间浪费，以及电池能量密度过低等问题。
本申请实施例将H设置在0.2mm至30mm之间，在对电池整体重量影响不大的前提下，能够提高电池的结构强度，电池发生形变或破损的风险，提高电池的使用可靠性。可选地，0.5mm≤H≤10mm。示例性地，H为0.5mm、1mm、5mm、8mm以及10mm中的一者。
在一些实施例中，电池的重量为M，H和M满足:0.0002mm/kg≤H/M≤1mm/kg。示例性地，H/M为0.0002mm/kg、0.002mm/kg、0.05mm/kg、0.3mm/kg以及1mm/kg中的一者。
本申请实施例提到的“电池的重量M”指的是：包括箱体、电池单体20以及位于容纳腔14内的其他部件在内的全部重量。电池的重量M往往和电池容量呈正相关，但是由前述内容可知，加强板13的存在也会对电池的重量M产生影响，因此需要对电池的重量M以及加强板13的重量之间的关系进行限制，即需要对电池的重量M以及加强板13的最小厚度H之间的关系进行限制。
若H/M过小，则表明相对于整个电池而言，加强板13的厚度过小，无法满足增强电池结构强度的需求。若H/M过大，则表明电池中除加强板13外其他结构的重量过轻，进一步地，即容纳腔14内电池单体20的重量过轻，电池容量过小，能量密度过低。
因此本申请实施例将H/M设置在0.0002mm/kg至1mm/kg之间，在确保电池具有较高能量密度的同时，提高电池的结构强度，降低电池在外力 冲击作用下，出现变形或破损的风险。可选地，0.0006mm/kg≤H/M≤0.2mm/kg。示例性地，H/M为0.0006mm/kg、0.003mm/kg、0.01mm/kg、0.05mm/kg以及0.2mm/kg中的一者。
在一些实施例中，加强板13的最小厚度H小于或等于承载板11的最小厚度。
加强板13连接于承载板11上，用于增大电池在承载板11至少部分位置处的厚度，从而提高电池的结构强度。同时本申请实施例还考虑到电池的轻量化设计，因此将厚度H设置为小于或等于承载板11的最小厚度，以使整个加强板13的体积承载板11的体积，在提高结构强度的同时，尽可能降低电池的整体重量。可选地，加强板13与承载板11采用相同材质制成。这样可以确保加强板13的重量小于承载板11的重量，有助于电池轻量化设计。
在一些实施例中，如图5和图6所示，加强板13位于承载板11背离容纳腔14的一侧。
电池单体20连接于承载板11并位于容纳腔14内，而加强板13位于承载板11背离容纳腔14的一侧，即电池单体20与加强板13分别位于承载板11的两侧，承载板11将电池单体20与加强板13分隔开。由于加强板13位于承载板11背离容纳腔14的一侧，因此加强板13的存在不会占用容纳腔14的内部空间，进而不会影响到电池单体20在容纳腔14内的可占用空间，即可以在容纳腔14内布置更多或更大尺寸的电池单体20。
此外，对于电池制备过程而言，由于加强板13位于承载板11背离容纳腔14的一侧，因此电池可以按照传统制备工艺进行生产制作，然后在制作完成后通过焊接或螺栓连接等方式，将加强板13固定在承载板11上，从而增强电池的结构强度。或者也可以将加强板13直接固定安装在车辆底盘上，然后将经由传统工艺制备形成的电池直接固定在位于底盘的加强板13上，实现车辆与电池的固定连接。无论是哪种制备方式，都仅需在传统制备工艺过程中，额外增加一个简单的工序即可，因此可以降低电池制备的难度。
综上，本申请实施例通过将加强板13设置在承载板11背离容纳 腔14的一侧，使得加强板13的存在不会占用容纳腔14的内部空间，即不会影响到电池单体20在容纳腔14内的可占用空间，从而确保电池的能量密度。同时还可以降低电池的制备难度，有利于大规模生产制备。
在一些实施例中，如图2至图4所示，连接区B包括与容纳腔14沿厚度方向Z相对的第一部分B1。在厚度方向Z上，加强板13与第一部分B1至少部分地重叠。
本申请实施例中提到的“与容纳腔14沿厚度方向Z相对的第一部分B1”指的是，容纳腔14在承载上正投影与连接区B交叠的部分即为连接区B的第一部分B1。图中容纳腔14的位置轮廓以虚线的形式示意出，需要说明的是，虚线所框处的范围并不构成本申请实施例对于容纳腔14位置、形状以及尺寸的限制，容纳腔14的具体结构需要根据电池内部具体结构布局决定。
由前述内容可知，容纳腔14中对应于连接区B的范围内不存在有电池单体20，进一步地，容纳腔14中对应于第一部分B1的区域中不存在有电池单体20，因此第一部分B1无法与电池单体20通过粘接等方式连接成为一个整体，相对于承载板11的其他位置来说，第一部分B1更容易在外力作用影响下，出现变形或破损问题。
因此本申请实施例将加强板13与第一部分B1至少部分重叠设置，加强板13与第一部分B1可以通过粘接、焊接以及螺栓连接等方式连接形成一个整体，从而能够提高电池在第一部分B1位置处的结构强度以及抗压能力，降低第一部分B1发生变形或破损问题的风险。
在一些实施例中，连接区B还包括第二部分B2，第二部分B2与侧梁12沿厚度方向Z重叠并连接。
第二部分B2位于第一部分B1远离承载区A的一侧，第一部分B1和第二部分B2可以采用相同材料制成，也可以采用不同材料制成。并且第一部分B1的厚度可以与第二部分B2的厚度相同，也可以与第二部分B2的厚度不同，本申请实施例对此不作限制。示例性地，第一部分B1和第二部分B2为一体式结构，两者采用相同材质制成，且两者厚度相同。
第二部分B2与侧梁12沿厚度方向Z重叠，即侧梁12在承载板 11上的正投影与连接区B的第二部分B2重合，第二部分B2用于实现承载板11与侧梁12之间的连接。在承载板11制备过程中，可以在第二部分B2位置处设置多个安装孔，通过螺栓连接的方式将承载板11与侧梁12固定。
第二部分B2可以与侧梁12连接形成一个整体，因此侧梁12的存在可以提高电池在第二部分B2位置处的结构强度，降低第二部分B2在外力作用下发生变形或破损的风险，提高电池整体可靠性。
需要说明的是，加强板13与第一部分B1至少部分重叠设置，对于第二部分B2来说，由于侧梁12的存在，因此第二部分B2位置处可以设置有加强板13，也可以不设置有加强板13，即加强板13在承载板11的正投影与第一部分B1可以重叠设置，也可以错位分布，本申请实施例对此不作限制。
在一些实施例中，在厚度方向Z上，承载区A与加强板13至少部分地重叠。
电池单体20设置于承载板11的承载区A上，电池单体20的存在可以起到增强电池在承载区A位置处的结构强度。通常情况下，电池单体20与承载板11之间存在有胶体，用以实现两者之间的相对固定。而当车辆运行在崎岖或其他险恶地势时，承载板11会产生振动，并传递至电池单体20使其一同晃动，在一定时间后，位于承载板11与电池单体20之间的胶体很难保证两者相对位置的可靠性。
在这种情况下，本申请实施例将承载区A与加强板13至少部分地重叠，使得加强板13能够提高承载区A至少部分位置处的整体厚度，从而能够减小振动影响，降低承载板11与电池单体20之间发生脱胶问题的风险，提高承载板11与电池单体20之间相对位置的可靠性。同时加强板13还可以提高承载区A至少部分位置处的结构强度，从而降低外部冲击等因素对电池单体20的影响。
在一些实施例中，加强板13连接于侧梁12。
侧梁12与承载板11相连接，两者位置保持相对固定。在此基础上，通过将加强板13连接于侧梁12，使得加强板13与侧梁12保持固定，从而能够提高加强板13与承载板11之间相对位置的可靠性。其中，加强 板13与侧梁12的连接方式包括但不限于焊接、粘接以及螺栓连接等。
需要说明的是，对于加强板13与侧梁12之间的具体连接位置，本申请实施例不作限制。具体地说，可以将加强板13设置在承载板11朝向侧梁12的表面，然后将加强板13固定于侧梁12的底部。可替代地，也可以将加强板13设置为L形结构，加强板13包括有垂直设置的两个部分，其中一个部分位于承载板11背离侧梁12的一侧，另一部分位于侧梁12背离容纳腔14的一侧并与侧梁12固定连接。
此外，在电池制备过程中，可以先将加强板13与侧梁12连接固定，然后把加强板13与侧梁12作为一个整体安装在承载板11上，以确保加强板13与侧梁12之间相对位置的可靠。或者也可以先将加强板13安装在承载板11上，然后将侧梁12固定与加强板13上，通过加强板13提高承载板11与侧梁12之间连接的可靠性。
在一些实施例中，请参阅图2、图3以及图7，侧梁12为多个，多个侧梁12沿承载板11的周向设置，加强板13与至少一个侧梁12连接。
多个侧梁12与承载板11共同围合形成容纳腔14，示例性地，侧梁12的数量为四个，四个侧梁12首尾相接并共同组成方环结构。相邻侧梁12之间可以采用焊接、粘接以及螺栓连接等方式实现，并且多个侧梁12中可以仅有部分侧梁12与承载板11固定连接，也可以全部侧梁12均与承载板11固定连接，本申请实施例对此不作限制。
加强板13的数量可以为一个，也可以为多个，至少一个加强板13与至少一个侧梁12连接固定。示例性地，加强板13的数量与侧梁12数量相对应，多个加强板13同样沿承载板11的周向设置，多个加强板13与多个侧梁12位置对应，且呈对应关系的加强板13与侧梁12相互连接。
在本申请实施例中，多个侧梁12依次首尾相接以形成闭环结构，多个侧梁12围设在容纳腔14的外周侧。同时加强板13与至少一者侧梁12连接，以提高侧梁12、加强板13以及承载板11三者间相对位置的可靠性，从而能够在不同工况条件下，保证电池整体结构稳定。
在一些实施例中，如图3和图7所示，多个侧梁12包括两个第一侧梁121和两个第二侧梁122，两个第一侧梁121沿宽度方向X设置， 两个第二侧梁122沿长度方向Y设置，宽度方向X与长度方向Y相交。各第二侧梁122连接两个第一侧梁121，加强板13为两个，两个加强板13沿宽度方向X间隔设置并分别连接于两个第一侧梁121。
第二侧梁122用于将间隔设置的两个第一侧梁121连接固定，两个第一侧梁121沿宽度方向X间隔设置且均沿长度方向Y延伸，两个第二侧梁122沿长度方向Y间隔设置且均沿宽度方向X延伸。示例性地，宽度方向X与长度方向Y垂直设置。
由于电池内部结构的限制，导致电池单体20与第一侧梁121之间的距离过大。示例性地，如图2所示，容纳腔14内除了包括电池单体20外，还包括有热管理部件30，热管理部件30用于调节电池内部电池单体20的温度，确保电池单体20能够保持合适温度进行工作。
热管理部件30包括有换热板31以及用于连接多个换热板31的汇流管32。换热板31与电池单体20贴合或邻近设置，是用于调节电池单体20温度的主要部件，换热板31内通常存在有可供流体通过的通道，当电池需要降温时，可以向换热板31输送冷流体，冷流体在通道内流动并带走电池单体20的部分热量，以此实现降温操作。当电池需要升温时，可以向换热板31输送热流体，热流体在通道内流动并向对应电池单体20提供部分热量，以此实现升温操作。
汇流管32与换热板31的通道连通，用于向一个或多个换热板31输送或转移冷热流体。汇流管32通常位于电池单体20与第一侧梁121之间，由于汇流管32的存在，导致电池单体20与第一侧梁121之间的距离过大，从而使得连接区B的宽度过大，电池容易在电池单体20与第一侧梁121之间的连接区B处发生变形或破损的问题。
因此本申请实施例将加强板13设置为两个，并使两个加强板13分别连接于两个第一侧梁121，从而能够对承载板11中对应于电池单体20与第一侧梁121之间的连接区B起到提高结构强度的效果。
此外，本申请实施例中的两个加强板13为间隔设置的两个小板，即两个加强板13在承载板11的正投影仅会与承载板11中的部分结构重合。这种设计相较于将加强板13设置为覆盖整个承载板11的方案，可以 在提高电池结构强度的同时，减小加强板13的整体重量，从而有利于电池的轻量化设计。
需要说明的是，对于两个加强板13的尺寸以及两者之间的间隔距离，本申请实施例不作限制。示例性地，如图4和图7所示，两个加强板13在承载板11的正投影与第一部分B1重合，两个加强板13之间的距离即为承载区A在宽度方向X上的尺寸。
在一些实施例中，加强板13具有支撑区C，支撑区C与承载板11的厚度方向Z上重叠。
本申请实施例中的“支撑区C与承载板11的厚度方向Z上重叠”指的是：加强板13在承载板11上正投影与承载板11重合的部分即为加强板13的支撑区C，加强板13中的支撑区C主要用于提高承载板11中特定位置处的结构强度。
需要说明的是，根据加强板13结构的不同，加强板13可以全部为支撑区C，也可以包括有除支撑区C外的其他部分。示例性地，如图3和图7所示，当加强板13全部位于承载板11背离容纳腔14一侧，且加强板13的全部在承载板11上的正投影均位于承载板11的外轮廓内时，加强板13全部为支撑区C。或者当加强板13为前述实施例中提到的L形结构时，加强板13中位于承载板11背离容纳腔14一侧的部分为支撑区C，而加强板13中位于侧梁12背离容纳腔14的一侧的部分为加强板13中除支撑区C以外的其他部分。
在一些实施例中，承载板11的一部分位于第一侧梁121和加强板13之间，并连接于第一侧梁121和加强板13。
本申请实施例中提到的“承载板11的一部分位于第一侧梁121和加强板13之间”指的是，在承载板11中部分结构在承载板11的厚度方向Z上位于第一侧梁121和加强板13之间，即第一侧梁121及加强板13在承载板11上的正投影至少部分重叠。
承载板11将第一侧梁121和加强板13间隔开，并且承载板11在厚度方向Z上具有相对的两个表面，其中一个表面朝向侧梁12设置，并可以通过焊接或粘接等方式实现与侧梁12之间的固定。另一个表面朝向加强 板13设置，同样可以通过焊接或粘接等方式实现与加强板13之间的固定。
本申请实施例通过控制第一侧梁121与加强板13之间的相对位置关系，使得承载板11的一部分能够同时位于第一侧梁121和加强板13之间，承载板11通过该部分能够同时实现承载板11、加强板13以及第一侧梁121三者之间的连接。与第一侧梁121和加强板13在承载板11上错位安装的方案相比，这种设计能够使得承载板11上可以有更多区域用于放置电池单体20，从而提高电池的能量密度。
在一些实施例中，加强板13与第一侧梁121一体成型。
加强板13与第一侧梁121一体成型，可以提高加强板13与第一侧梁121的连接可靠性，降低两者因外部冲击等因素的影响，出现连接失效的风险。并且在电池制备过程中，可以先将加强板13与第一侧梁121一体成型，使得加强板13与第一侧梁121连接成为一个整体，然后再将加强板13与第一侧梁121所构成的整体连接在承载板11的特定位置处，从而能够提高第一侧梁121、加强板13以及承载板11三者位置的精度。
需要说明的是，在本申请实施例中，加强板13与第一侧梁121可以采用相同材质制成，而承载板11可以采用与第一侧梁121相同或不同的材质制成，本申请实施例对此不作限制。
在一些实施例中，加强板13的材质包括钢和铝合金中的至少一种。
钢和铝合金均是具有较强结构强度的材料，并且与其他材料相比，钢和铝合金可以在保证结构强度的同时，很大程度地减小加强板13的整体重量，进而可以减小电池的整体重量，有助于电池的轻量化设计。
第二方面，本申请实施例提供了一种电池，如图2和图4所示，电池包括前述任一实施方式中的箱体以及电池单体20，电池单体20容纳于容纳腔14并连接于承载板11的承载区A。
需要说明的是，本申请实施例提供的电池，能够具备前述任一实施方式中箱体的有益效果，具体请参照前述对于箱体有益效果的描述，本申请实施例在此不再赘述。
在一些实施例中，电池单体20粘接于承载区A。
电池单体20与承载板11之间设置有胶体，胶体在承载板11上的涂布区域通常即为承载板11的承载区A。胶体用于实现电池单体20与承载板11之间的固定，并且在粘接过程中，通常会有部分胶体从电池两侧溢出，并填充至电池单体20与侧梁12之间的区域中，该部分胶体可以在一定程度上实现电池单体20与侧梁12之间的粘接固定，从而提高电池结构可靠性。
在一些实施例中，在承载板11的厚度方向Z上，加强板13与电池单体20至少部分地重叠。
本申请实施例中的“加强板13与电池单体20至少部分地重叠”指的是：加强板13在承载板11上正投影与电池单体20在承载板11上的正投影存在至少部分交叠。
由前述内容可知，加强板13用于增强电池在连接区B处的结构强度，即增强电池单体20与侧梁12之间区域的结构强度。在此基础上，本申请实施例还将加强板13与电池单体20至少部分地重叠，使得加强板13同时还可以对电池中对应与电池单体20所在的至少部分区域起到结构增强的效果，进一步增强电池的结构强度。
在一些实施例中，电池单体20为多个，多个电池单体20构成电池组，电池组与侧梁12之间设有间隙。在厚度方向Z上，加强板13的至少部分与间隙相对设置。
多个电池单体20通过串联、并联或者混连的方式共同构成电池组。通常情况下，电池组与侧梁12间隔设置从而形成用于避让电池内部部件的间隙。
本申请实施例中提到的“在厚度方向Z上，加强板13的至少部分与间隙相对设置”，指的是间隙所在区域在承载板11上的正投影与及加强板13在承载板11上的正投影至少部分交叠。其中，间隙即对应于承载板11中的第一部分B1。
此外，对于间隙的数量以及具体形状尺寸，本申请实施例不作限制。示例性地，间隙的数量为四个，且围设在电池包的周侧。
间隙的存在使得电池在该位置处的结构强度不足，因此本申请实 施例将加强板13的至少部分与间隙相对设置，从而能够提高电池在间隙位置处的结构强度以及抗压能力，降低间隙发生变形或破损问题的风险。
在一些实施例中，电池还包括热管理部件30，热管理部件30用于调节电池单体20的温度。在厚度方向Z上，热管理部件30的投影与加强板13的投影至少部分交叠。
由前述内容可知，电池组与侧梁12间隔设置从而形成用于避让电池内部部件的间隙，示例性地，热管理部件30包括多个换热管以及将多个换热管连通的汇流管32，汇流管32位于电池组与侧梁12之间的间隙中。需要说明的是，汇流管32的数量可以与间隙数量相同，也可以与间隙数量不同，即部分间隙中可以不设置有汇流管32，具体结构需要根据电池实际情况决定，本申请实施例对此不作限制。
热管理部件30至少部分位于间隙中，若电池在间隙对应位置处结构强度不足，则在外部冲击等因素的影响下，承载板11的变形或破损容易对热管理部件30产生不利影响，导致电池整体温度调节效果下降，容易引发安全隐患。
因此本申请实施例将热管理部件30的投影与加强板13的投影至少部分重叠设置，从而提高该位置处的结构强度，降低热管理部件30受到外部冲击等因素的影响，提高电池的可靠性以及安全性。
第三方面，本申请实施例提供了一种用电装置，包括前述任一实施方式中的电池，电池用于提供电能。
需要说明的是，本申请实施例提供的用电装置具有前述任一实施方式中电池的有益效果，具体请参照前述对于电池有益效果的描述，本申请实施例不再赘述。
根据本申请提供的一些实施例，如图2至图5所示，电池包括箱体以及位于箱体内的电池单体20和热管理部件30，箱体包括承载板11、侧梁12以及加强板13，侧梁12和承载板11围合形成用于容纳多个电池单体20和热管理部件30的容纳腔14，承载板11包括承载区A和连接区B，连接区B包括第一部分B1以及位于第一部分B1远离承载区A一侧的第二部分B2，侧梁12连接于第二部分B2。
多个电池单体20个共同构成电池组，电池组粘接于承载板11的承载区A，电池组与侧梁12之间存在间隙，热管理部件30至少部分位于间隙中，间隙在承载板11上的正投影与第一部分B1重叠。
加强板13的数量为两个，两个加强板13在宽度方向X上间隔设置，且加强版在承载板11上的正投影与第一部分B1至少部分交叠。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换，但这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (18)

  1. 一种电池的箱体，包括：
    承载板，包括承载区和连接区，所述承载区用于放置电池单体；
    侧梁，和所述承载板围合形成用于容纳所述电池单体的容纳腔，所述侧梁连接于所述连接区；以及，
    加强板，所述加强板的至少部分在所述承载板的厚度方向上与所述连接区重叠并连接于所述连接区。
  2. 根据权利要求1所述的箱体，其中，所述加强板的最小厚度为H，0.2mm≤H≤30mm。
  3. 根据权利要求2所述的箱体，其中，0.5mm≤H≤10mm。
  4. 根据权利要求1-3任一项所述的箱体，其中，所述加强板的最小厚度为H，所述电池的重量为M，H和M满足：0.0002mm/kg≤H/M≤1mm/kg。
  5. 根据权利要求4所述的箱体，其中，H和M满足：0.0006mm/kg≤H/M≤0.2mm/kg。
  6. 根据权利要求1-5任一项所述的箱体，其中，所述加强板的最小厚度小于或等于所述承载板的最小厚度。
  7. 根据权利要求1-6任一项所述的箱体，其中，所述加强板位于所述承载板的背离所述容纳腔的一侧。
  8. 根据权利要求1-7任一项所述的箱体，其中，在所述厚度方向上，所述承载区与所述加强板至少部分地重叠。
  9. 根据权利要求1-8任一项所述的箱体，其中，所述加强板连接于所述侧梁。
  10. 根据权利要求9所述的箱体，其中，所述侧梁为多个，多个所述侧梁沿所述承载板的周向设置；
    所述加强板与至少一个所述侧梁连接。
  11. 根据权利要求10所述的箱体，其中，多个所述侧梁包括两个第一侧梁和两个第二侧梁，两个所述第一侧梁沿所述箱体的宽度方向间隔设置，两个所述第二侧梁沿所述箱体的长度方向间隔设置，各所述第二侧梁连接所述两个第一侧梁；
    所述加强板为两个，两个所述加强板沿所述宽度方向间隔设置并分别连接于两个所述第一侧梁。
  12. 根据权利要求11所述的箱体，其中，所述承载板的一部分位于所述第一侧梁和所述加强板之间，并连接于所述第一侧梁和所述加强板。
  13. 根据权利要求11所述的箱体，其中，所述加强板与所述第一侧梁一体成型。
  14. 一种电池，包括：
    根据权利1-13任一项所述的箱体；以及
    电池单体，容纳于所述容纳腔并连接于所述承载板的承载区。
  15. 根据权利要求14所述的电池，其中，在所述承载板的厚度方向上，所述加强板与所述电池单体至少部分地重叠。
  16. 根据权利要求14或15所述的电池，其中，所述电池单体为多个，多个所述电池单体构成电池组；
    所述电池组与所述侧梁之间设有间隙；
    在所述厚度方向上，所述加强板的至少部分与所述间隙相对设置。
  17. 根据权利要求14-16任一项所述的电池，还包括热管理部件，所述热管理部件用于调节所述电池单体的温度；
    在所述厚度方向上，所述热管理部件的投影与所述加强板的投影至少部分地重叠。
  18. 一种用电装置，包括根据权利要求14-17任一项所述的电池，所述 电池用于提供电能。
PCT/CN2022/109082 2022-07-29 2022-07-29 电池的箱体、电池以及用电装置 Ceased WO2024021054A1 (zh)

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EP22952501.9A EP4517972A4 (en) 2022-07-29 2022-07-29 BATTERY BOX, BATTERY AND ELECTRICAL DEVICE
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