WO2025232133A1 - 电池模组、电池以及用电装置 - Google Patents

电池模组、电池以及用电装置

Info

Publication number
WO2025232133A1
WO2025232133A1 PCT/CN2024/132099 CN2024132099W WO2025232133A1 WO 2025232133 A1 WO2025232133 A1 WO 2025232133A1 CN 2024132099 W CN2024132099 W CN 2024132099W WO 2025232133 A1 WO2025232133 A1 WO 2025232133A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
battery module
battery cells
along
end plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/132099
Other languages
English (en)
French (fr)
Inventor
林其伟
陈俊涛
王湘
王明
耿正炜
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
Publication of WO2025232133A1 publication Critical patent/WO2025232133A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • 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 more specifically, to a battery module, a battery, and an electrical device.
  • This application provides a battery module, a battery, and an electrical device that can extend the battery's lifespan.
  • this application provides a battery module, including multiple battery cells, two end plates, straps, and a tensioning member.
  • the multiple battery cells are arranged along a first direction; the two end plates are respectively disposed at both ends of the multiple battery cells along the first direction; the straps are disposed around the battery cells and the end plates; and the two ends of the tensioning member are respectively connected to the two end plates.
  • the discharge capacity of the battery module can be larger and the application range can be wider; by arranging the multiple battery cells along the first direction, the overall structure of the battery module can be compact, which is beneficial to improving the energy density of the battery module; by setting two end plates at both ends of the multiple battery cells along the first direction, it can play a protective role for the battery cells in the first direction; by setting the straps around the battery cells and end plates, the straps can fix the multiple battery cells in the first direction, suppress the expansion force of the battery cells in the first direction, reduce the possibility of disintegration of the battery cells and the battery module, extend the service life of the battery module, and the straps are in direct contact with the end plates at both ends of the battery module in the first direction, which can reduce the direct impact of the straps.
  • the tensioning member by connecting its two ends to two end plates, can fix multiple battery cells in the first direction, suppressing the expansion force of the battery cells in the first direction, reducing the possibility of disintegration of the battery cells and battery module, and extending the service life of the battery module. Furthermore, the tensioning member can increase the force strength of the battery module in the first direction, reducing the possibility of battery cell damage caused by force in the first direction, improving the overall structural stability of the battery module, and further extending its service life. Therefore, by using the straps and tensioning member together on multiple battery cells, the suppression force on the battery cells in the first direction is stronger, the possibility of disintegration of the battery cells and battery module is smaller, and the service life of the battery module is longer.
  • the battery cell includes a housing and an end cap.
  • the housing has an opening at one end along a second direction, and the end cap covers the opening.
  • the tensioning member includes a main body and two connecting parts. The two connecting parts are respectively connected to both ends of the main body and are respectively connected to two end plates.
  • the main body is disposed on the side of the end cap facing away from the housing.
  • the first direction is perpendicular to the second direction.
  • the battery cell includes a housing and an end cap.
  • the housing has an opening at one end along the second direction, allowing the electrode assembly of the battery cell to be installed into the housing through the opening.
  • the end cap is located at the opening, sealing the internal space of the battery cell and reducing the possibility of electrolyte leakage or external moisture entering the electrode assembly.
  • the tensioning member includes a main body and two connecting parts. The two connecting parts are respectively connected to both ends of the main body and are respectively connected to two end plates, allowing the tensioning member to provide tension force along the first direction to multiple battery cells.
  • the main body is located on the side of the end cap facing away from the housing, facilitating the connection between the tensioning member and the end plates. Furthermore, the main body can act as a barrier to the end cap in the second direction, reducing the possibility of the end cap separating from the housing and extending the service life of the battery module.
  • a pressure relief mechanism is provided on the end cap, and a first through hole is provided on the main body, through which the pressure relief mechanism is exposed.
  • the first through hole is an elongated hole extending along a first direction, serving as a pressure relief mechanism for multiple battery cells. All components are exposed through the first through hole.
  • the first through hole is an elongated hole extending along the first direction.
  • the pressure relief mechanisms of multiple battery cells are exposed through the first through hole, which facilitates the preparation of the first through hole.
  • the area of the first through hole is relatively large, which is conducive to further improving the pressure relief speed of the pressure relief mechanism, improving the reliability of the pressure relief mechanism, and reducing the possibility of thermal runaway or even explosion of the battery module.
  • the connecting portion is attached to the side of the end plate opposite to the battery cell.
  • the connecting part is attached to the side of the end plate away from the battery cell, which makes the connection between the connecting part and the end plate more secure and the connection strength higher. This makes the tensioning force of the tensioning member on the battery cell in the first direction stronger, which can reduce the possibility of disintegration of the battery cell and battery module and extend the service life of the battery module.
  • the connecting part is less likely to interfere with the battery cell, and the possibility of interference damage between the battery cell and the connecting part is small.
  • the strap has a first segment that is attached to the side of the end plate away from the battery cell, and the first segment does not overlap with the connecting portion along a first direction.
  • the connection between the first section and the end plate can be made more secure, and the connection strength between the strap and the end plate can be higher.
  • the strap exert a stronger restraining force on the battery cell in the first direction, which can reduce the possibility of disintegration of the battery cell and the battery module and extend the service life of the battery module.
  • the first section is less likely to interfere with the battery cell, and the possibility of the battery cell being damaged by interference with the first section is small.
  • the possibility of interference between the strap and the tensioning member can be reduced, which facilitates the installation of the strap and the tensioning member, and does not further increase the size of the battery module in the first direction, which is conducive to improving the energy density of the battery module.
  • the connecting portion has a first fixing hole
  • the end plate has a second fixing hole
  • the battery module further includes a first fixing member, which passes through the first fixing hole and is connected to the second fixing hole.
  • the fixing structure between the tensioning member and the end plate can be made simple and easy to manufacture, which is beneficial to improving the manufacturing efficiency of the battery module.
  • the end plate is provided with a receiving groove
  • the battery module further includes an insert disposed in the receiving groove.
  • the insert is provided with a third fixing hole, and a first fixing member passes through the first fixing hole and the second fixing hole and is connected to the third fixing hole.
  • the weight of the end plate can be reduced, thereby reducing the overall weight of the battery module.
  • the connection between the tensioning member and the end plate can be made more stable, the tensioning force of the tensioning member on multiple battery cells can be made more stable, the expansion force of the battery cells in the first direction can be better suppressed, the possibility of disintegration of the battery cells and the battery module can be reduced, thereby further extending the service life of the battery module.
  • the receiving groove is disposed at one end of the end plate near the main body along the second direction.
  • the length of the connecting part along the second direction is shorter, and the possibility of deformation of the connecting part is smaller.
  • the end plate is provided with a limiting groove, and a portion of the strap is accommodated in the limiting groove.
  • the binding strap is partially accommodated in the limiting groove, which makes it less likely for the binding strap to shift relative to the end plate in the second direction.
  • the binding force of the binding strap on multiple battery cells in the first direction is more stable, which can better suppress the expansion force of the battery cells in the first direction, reduce the possibility of disintegration of the battery cells and battery module, and thus further extend the service life of the battery module.
  • the battery module includes two straps, which are spaced apart along a second direction.
  • the straps can exert a greater binding force on multiple battery cells in the first direction, which can better suppress the expansion force of the battery cells in the first direction, reduce the possibility of disintegration of the battery cells and battery module, and thus further extend the service life of the battery module. Furthermore, the binding force of the straps on multiple battery cells is distributed in the second direction, making the force on the battery cells more uniform and reducing the possibility of damage caused by excessive force on a single part of the battery cell.
  • the distance between the two straps is D
  • the length of the battery cell is L, satisfying 1/2 ⁇ D/L ⁇ 3/5.
  • this application provides a battery, including the battery module described in any of the above solutions.
  • the battery further includes a housing with an accommodating space, and at least a portion of the battery module is accommodated in the accommodating space.
  • the housing can protect the individual battery cells and reduce the possibility of damage caused by direct force on the individual battery cells.
  • the end plate is provided with a second through hole, which penetrates the end plate along a second direction.
  • the battery also includes a second fixing member, which penetrates the second through hole along a first direction and is connected to the housing. The first direction is perpendicular to the second direction.
  • the second through hole penetrate the end plate along the second direction, and making the second fixing member penetrate the second through hole along the first direction and connect with the housing, the connection between the end plate and the housing can be facilitated, making it less likely for the battery cell to shake inside the housing, and reducing the possibility of damage to the battery cell due to collision with the housing; and the second through hole can reduce the weight of the end plate, thereby reducing the overall weight of the battery module.
  • the side of the battery cell facing away from the tensioner is bonded to the housing.
  • the connection between the battery cell and the housing can be made more stable, the battery cell is less likely to shake inside the housing, and the possibility of damage to the battery cell caused by collision between the battery cell and the housing can be reduced.
  • this application provides an electrical device including a battery as described in any of the above embodiments, wherein the battery is used to provide electrical energy.
  • FIG. 1 is a schematic diagram of the vehicle structure provided in some embodiments of this application.
  • Figure 2 is a schematic diagram of the exploded structure of a battery provided in some embodiments of this application.
  • Figure 3 is a three-dimensional structural schematic diagram of a battery module provided in some embodiments of this application.
  • FIG. 4 is an exploded structural diagram of a battery module provided in some embodiments of this application.
  • Figure 5 is a three-dimensional structural diagram of a battery cell in a battery module provided in some embodiments of this application;
  • Figure 6 is a partially enlarged structural diagram of point A in the battery module in Figure 4.
  • Figure 7 is a perspective view of a portion of the structure of a battery module provided in some other embodiments of this application.
  • Icons 1000 - Vehicle; 100 - Battery; 110 - Housing; 111 - First Sub-Housing; 112 - Second Sub-Housing; 120 - Battery Module; 121 - Battery Cell; 1211 - Housing; 1212 - End Cap; 1213 - Pressure Relief Mechanism; 1214 - Electrode Terminal; 122 - End Plate; 1221 - Second Fixing Hole; 1222 - Receiving Slot; 1223 - Second Through Hole; 123 - Strap; 123 1-First segment; 1232-Second segment; 1233-Third segment; 1234-Fourth segment; 124-Tightening member; 1241-Main body; 1241a-First through hole; 1242-Connecting part; 1242a-First fixing hole; 125-First fixing member; 126-Insert; 1261-Third fixing hole; 200-Controller; 300-Motor; X-First direction; Y-Second direction; Z-Third direction.
  • multiple means two or more (including two).
  • the battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited thereto.
  • the battery cell may be flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.
  • the battery mentioned in the embodiments of this application refers to a single physical module comprising multiple battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • a battery may also generally include a housing for encapsulating one or more battery cells or multiple battery modules. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.
  • a single battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly consists of a positive electrode, a negative electrode, and a separator.
  • the battery cell primarily functions by the movement of metal ions between the positive and negative electrodes.
  • the positive electrode includes a positive current collector and a positive active material layer.
  • the positive active material layer is coated on the surface of the positive current collector, while the current collector without the coating acts as the positive electrode tab.
  • the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc.
  • the negative electrode includes a negative current collector and a negative active material layer.
  • the negative active material layer is coated on the surface of the negative current collector, while the current collector without the coating acts as the negative electrode tab.
  • the material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that large currents can pass through without melting, multiple positive electrode tabs and multiple negative electrode tabs are stacked together.
  • the material of the separator can be PP (polypropylene) or PE (polyethylene), etc.
  • this application provides a battery module, which includes multiple battery cells, two end plates, straps, and tensioning members.
  • the multiple battery cells are arranged along a first direction; the two end plates are respectively disposed at both ends of the multiple battery cells along the first direction; the straps are disposed around the battery cells and the end plates; and the two ends of the tensioning members are respectively connected to the two end plates.
  • the discharge capacity of the battery module can be increased, and its application range can be widened.
  • the overall structure of the battery module can be made compact, which is beneficial to improving the energy density of the battery module.
  • the battery cells can be protected in the first direction.
  • the straps can fix the multiple battery cells in the first direction, suppress the expansion force of the battery cells in the first direction, reduce the possibility of disintegration of the battery cells and the battery module, extend the service life of the battery module, and the straps are in direct contact with the end plates at both ends of the battery module in the first direction, which can reduce the direct impact of the straps.
  • the tensioning member by connecting its two ends to two end plates, can fix multiple battery cells in the first direction, suppressing the expansion force of the battery cells in the first direction, reducing the possibility of disintegration of the battery cells and battery module, and extending the service life of the battery module.
  • the tensioning member can increase the force strength of the battery module in the first direction, reducing the possibility of battery cell damage caused by force in the first direction, improving the overall structural stability of the battery module, and further extending its service life. Therefore, by using the straps and tensioning member together on multiple battery cells, the suppression force on the battery cells in the first direction is stronger, the possibility of disintegration of the battery cells and battery module is smaller, and the service life of the battery module is longer.
  • the batteries disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft.
  • a power system for such an electrical device can be constructed using batteries disclosed in this application.
  • This application provides an electrical device that uses a battery as its power source.
  • the device can be, but is not limited to, power tools, electric vehicles, electric cars, ships, spacecraft, etc.
  • Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.
  • the batteries described in the embodiments of this application are not limited to the electrical devices described above, but can also be applied to all... This describes a battery-powered device, but for the sake of brevity, the following embodiments use a vehicle as an example.
  • Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application.
  • Vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.
  • a battery 100 is installed inside vehicle 1000, which can be located at the bottom, front, or rear of vehicle 1000. Battery 100 can be used to power vehicle 1000; for example, battery 100 can serve as the operating power source for vehicle 1000.
  • Vehicle 1000 may also include a controller 200 and a motor 300. Controller 200 controls the battery 100 to supply power to motor 300, for example, to meet the power needs of vehicle 1000 during starting, navigation, and driving.
  • the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.
  • Figure 2 is a schematic diagram of the exploded structure of a battery provided in some embodiments of this application.
  • the battery 100 includes a housing 110 and a battery module 120.
  • the battery module 120 includes a plurality of battery cells 121, which are housed within the housing 110.
  • the housing 110 provides accommodating space for the battery cells 121, and can employ various structures.
  • the housing 110 may include a first sub-housing 111 and a second sub-housing 112, which overlap each other, together defining an accommodating space for the battery cells 121.
  • the first sub-box 111 can be a hollow structure with one end open, and the second sub-box 112 can be a plate-like structure.
  • the second sub-box 112 covers the opening side of the first sub-box 111 so that the first sub-box 111 and the second sub-box 112 together define the accommodating space.
  • the first sub-box 111 and the second sub-box 112 can both be hollow structures with one side open, and the opening side of the second sub-box 112 covers the opening side of the first sub-box 111.
  • the housing 110 can be a cuboid.
  • the housing 110 may also be a cylinder.
  • the enclosure 110 may be made of aluminum, aluminum alloy or other metal materials, so that the enclosure 110 has high load-bearing capacity.
  • the housing 110 may also be made of high-strength non-metallic materials such as carbon fiber or rigid plastic.
  • Figure 3 is a three-dimensional structural diagram of a battery module provided in some embodiments of this application
  • Figure 4 is an exploded structural diagram of a battery module provided in some embodiments of this application.
  • the battery module 120 includes a plurality of battery cells 121, two end plates 122, straps 123, and tensioning members 124.
  • the plurality of battery cells 121 are arranged along a first direction X.
  • the two end plates 122 are respectively disposed at both ends of the plurality of battery cells 121 along the first direction X.
  • the straps 123 are disposed around the battery cells 121 and the end plates 122.
  • the two ends of the tensioning members 124 are respectively connected to the two end plates 122.
  • the discharge capacity of the battery module 120 can be increased, and its application range can be widened.
  • the overall structure of the battery module 120 can be made compact, which is beneficial to improving the energy density of the battery module 120.
  • they can protect the battery cells 121 in the first direction X.
  • the straps 123 can fix the multiple battery cells 121 in the first direction X, suppress the expansion force of the battery cells 121 in the first direction X, reduce the possibility of disintegration of the battery cells 121 and the battery module 120, and extend the service life of the battery module 120. Furthermore, the straps 123 are in direct contact with the end plates 122 at both ends of the battery module 120 in the first direction X, which can reduce the possibility of damage to the battery cells 121 caused by the straps 123 directly acting on them.
  • the tensioning member 124 By connecting the two ends of the tensioning member 124 to the two end plates 122 respectively, multiple battery cells 121 can be fixed in the first direction X, suppressing the expansion force of the battery cells 121 in the first direction X, reducing the possibility of disintegration of the battery cells 121 and the battery module 120, and extending the service life of the battery module 120. Furthermore, the tensioning member 124 can also increase the stress strength of the battery module 120 in the first direction X, reducing the possibility of damage to the battery cells 121 due to stress in the first direction X, improving the overall structural stability of the battery module 120, and further extending the service life of the battery module 120.
  • the suppressive force on the battery cells 121 in the first direction X is stronger, the possibility of disintegration of the battery cells 121 and the battery module 120 is smaller, and the service life of the battery module 120 is longer.
  • the battery cell 121 can be cuboid, so that multiple battery cells 121 can be arranged in a matrix, which is beneficial to improving the energy density of the battery module 120.
  • the battery cell 121 may also be flat, cylindrical or other shapes.
  • multiple battery cells 121 can be connected in series, parallel, or in a mixed configuration.
  • a mixed configuration means that multiple battery cells 121 are connected in both series and parallel configurations. Multiple battery cells 121 can be directly connected in series, parallel, or in a mixed configuration, and then the battery module 120, composed of multiple battery cells 121, is housed within the housing 110.
  • the battery module 120 can also be... Multiple battery cells 121 are first connected in series, parallel, or in a mixed manner to form a battery cell module. Multiple battery cell modules are then connected in series, parallel, or in a mixed manner to form a whole, which is then housed in the housing 110.
  • Figure 5 is a three-dimensional structural diagram of a battery cell in a battery module provided in some embodiments of this application.
  • the battery cell 121 includes a housing 1211 and an end cap 1212.
  • the housing 1211 has an opening (not shown) at one end along the second direction Y, and the end cap 1212 covers the opening.
  • the battery cell 121 include a housing 1211 and an end cap 1212, with the housing 1211 having an opening at one end along the second direction Y, the electrode assembly of the battery cell 121 can be inserted into the housing 1211 through the opening, and the end cap 1212 is placed over the opening, which can seal the internal space of the battery cell 121 and reduce the possibility of electrolyte leakage or external moisture entering the electrode assembly.
  • the end cap 1212 has a plate-like structure, and the housing 1211 and the end cap 1212 together define a accommodating space for accommodating the electrode assembly (not shown) and the electrolyte.
  • both the housing 1211 and the end cap 1212 can be hollow structures with an opening on one side, with the opening side of the end cap 1212 covering the opening side of the housing 1211 to jointly form an accommodating space.
  • the housing 1211 and the end cap 1212 can be connected by welding.
  • the housing 1211 and the end cap 1212 can also be fixedly connected by means of bonding, interference fit, etc.
  • the outer shell consisting of housing 1211 and end cap 1212 can be a cuboid.
  • the outer shell may also be cylindrical.
  • the housing 1211 and the end cap 1212 may be made of aluminum, aluminum alloy or other metallic materials, which can enable the battery cell 121 to have higher stress performance.
  • the tensioning member 124 includes a main body 1241 and two connecting portions 1242, which are respectively connected to both ends of the main body 1241 and to two end plates 122.
  • the main body 1241 is disposed on the side of the end cap 1212 facing away from the housing 1211.
  • the first direction X is perpendicular to the second direction Y.
  • the tensioning member 124 include a main body 1241 and two connecting parts 1242, the two connecting parts 1242 are respectively connected to the two ends of the main body 1241 and respectively connected to the two end plates 122, so that the tensioning member 124 can provide tension force along the first direction X to multiple battery cells 121; along the second direction Y, the main body 1241 is disposed on the side of the end cover 1212 facing away from the housing 1211, which facilitates the connection between the tensioning member 124 and the end plate 122, and the main body 1241 can play a blocking role on the end cover 1212 in the second direction Y, reducing the possibility of the end cover 1212 and the housing 1211 disintegrating and separating, and extending the service life of the battery module 120.
  • the main body 1241 may be plate-shaped.
  • the main body 1241 may also be made of hollow profile or irregular profile.
  • the tensioning member 124 may be made of aluminum, aluminum alloy, or other metal materials, which enables the tensioning member 124 to have higher stress resistance. Since the main body 1241 is located on the side of the end cap 1212 facing away from the housing 1211, when the side of the battery module 120 with the tensioning member 124 is subjected to force, the external force does not directly act on the battery cell 121, and the tensioning member 124 can play a protective role for the battery cell 121.
  • the tensioner 124 may be covered with an insulating layer, which can reduce the possibility of multiple battery cells 121 short-circuiting through the tensioner 124.
  • the tensioning member 124 may also be a high-strength non-metallic material such as carbon fiber or rigid plastic, which can reduce the possibility of multiple battery cells 121 short-circuiting through the tensioning member 124.
  • the strap 123 may be made of aluminum, aluminum alloy or other metal materials, which can make the strap 123 more effective at restraining multiple battery cells 121.
  • the end cap 1212 is provided with a pressure relief mechanism 1213
  • the main body 1241 is provided with a first through hole 1241a, through which the pressure relief mechanism 1213 is exposed.
  • the possibility of the tensioning member 124 blocking the pressure relief mechanism 1213 can be reduced, allowing the pressure relief mechanism 1213 to relieve pressure through the first through hole 1241a. This helps to improve the pressure relief speed of the pressure relief mechanism 1213, improve the reliability of the pressure relief mechanism 1213, and reduce the possibility of thermal runaway or even explosion of the battery module 120.
  • the pressure relief mechanism 1213 can be fixedly connected to the end cover 1212 by welding, bonding or other means, or it can be integrally formed with the end cover 1212.
  • the tensioner 124 is spaced apart from the battery cell 121 along the second direction Y.
  • the external force on the tension member 124 can be reduced.
  • the possibility of force acting on the pressure relief mechanism 1213 is reduced, thereby reducing the possibility of premature pressure relief caused by damage to the pressure relief mechanism 1213, thus protecting the pressure relief mechanism 1213, and reducing the possibility of damage or even disintegration of the battery cell 121 due to direct force.
  • the length direction of the main body 1241 is parallel to the first direction X.
  • the length direction of the main body 1241 is parallel to the first direction X, so that the force of the tensioning member 124 connected between the two end plates 122 is parallel to the first direction X. That is, the force of the tensioning member 124 is entirely applied to the first direction X, which reduces the problem of the force of the tensioning member 124 being applied to other directions and causing the force in the first direction X to be small.
  • This can better limit the expansion of multiple battery cells 121 along the first direction X, thereby further improving the internal cycle performance of the battery cells 121, extending the service life of the battery cells 121, and improving the overall structural stability of the battery module 120.
  • the first through hole 1241a is an elongated hole extending along the first direction X, and the pressure relief mechanism 1213 of the plurality of battery cells 121 is exposed through the first through hole 1241a.
  • the pressure relief mechanisms 1213 of multiple battery cells 121 are exposed through the first through hole 1241a, which facilitates the preparation of the first through hole 1241a.
  • the area of the first through hole 1241a is relatively large, which is conducive to further improving the pressure relief speed of the pressure relief mechanism 1213, improving the reliability of the pressure relief mechanism 1213, and reducing the possibility of thermal runaway or even explosion of the battery module 120.
  • first through holes 1241a there may be multiple first through holes 1241a, and the multiple first through holes 1241a are spaced apart along the first direction X, and the pressure relief mechanism 1213 of at least one battery cell 121 is exposed through a corresponding first through hole 1241a.
  • the tensioning member 124 is less prone to deformation and has stronger stress resistance.
  • an electrode terminal 1214 is provided on the end cap 1212, and the tensioning member 124 does not overlap with the electrode terminal 1214 along the second direction Y.
  • Electrode terminal 1214 is a metal component disposed on the end cover 1212 of the housing. It can be made of metal materials such as silver-plated copper, zinc-plated copper, copper, aluminum, iron, etc., and can play the role of conducting electricity and transmitting electrical signals.
  • the electrode terminal 1214 may be arranged in a cuboid shape.
  • the electrode terminal 1214 may also be arranged in the shape of a cylinder, an elliptical cylinder, or the like.
  • the pressure relief mechanism 1213 may be disposed in the middle of the end cap 1212, between the two electrode terminals 1214, so that when the pressure inside the battery cell 121 is too high, the gas inside the battery cell 121 can be released through the pressure relief mechanism 1213.
  • the pressure relief mechanism 1213 may also be disposed at the end of the end cap 1212.
  • electrode terminals 1214 may also be disposed on housing 1211.
  • the pressure relief mechanism 1213 may also be disposed on the housing 1211.
  • the electrode terminal 1214 and the pressure relief mechanism 1213 may also be disposed on different walls of the battery cell 121, so that the tensioning member 124 will not block the pressure relief mechanism 1213, which facilitates the pressure relief mechanism 1213 to relieve pressure and improves the reliability of the pressure relief mechanism 1213.
  • the tensioning member 124 may not have a through hole, and along the second direction Y, the tensioning member 124 does not overlap with the pressure relief mechanism 1213 and the electrode terminal 1214.
  • tensioning member 124 By eliminating through holes in the tensioning member 124, its fabrication is simplified, improving the manufacturing efficiency of the battery module 120. Furthermore, by ensuring that the tensioning member 124 does not overlap with the pressure relief mechanism 1213 or the electrode terminal 1214 along the second direction Y, pressure relief by the pressure relief mechanism 1213 is facilitated, allowing other components of the battery 100 to connect to the electrode terminal 1214. This reduces the likelihood of interference between the tensioning member 124 and other components, further enhancing the manufacturing efficiency of the battery 100.
  • tension members 124 there may be multiple tension members 124, which are spaced apart along a third direction Z.
  • the multiple tensioning members 124 can exert stronger restraining force on the battery cell 121 in the first direction X, which can further reduce the possibility of disintegration of the battery cell 121 and the battery module 120, and further extend the service life of the battery module 120.
  • the plurality of tension members 124 do not overlap with the electrode terminals 1214.
  • the connecting portion 1242 is attached to the side of the end plate 122 opposite to the battery cell 121.
  • connection portion 1242 is attached to the side of the end plate 122 away from the battery cell 121, which makes the connection between the connection portion 1242 and the end plate 122 more secure and stronger. This makes the tensioning member 124 exert a stronger restraining force on the battery cell 121 in the first direction X, which can reduce the possibility of disintegration of the battery cell 121 and the battery module 120 and extend the service life of the battery module 120. In addition, the connection portion 1242 is less likely to interfere with the battery cell 121, and the possibility of interference damage between the battery cell 121 and the connection portion 1242 is small.
  • the connecting portion 1242 may also be attached to the side of the end plate 122 near the battery cell 121.
  • the surface of the connecting portion 1242 near the end plate 122 is a plane, and the surface of the end plate 122 away from the battery cell 121 is a plane.
  • connecting part 1242 By making the surface of the connecting part 1242 near the end plate 122 flat, and the surface of the end plate 122 away from the battery cell 121 flat, it is easier for the connecting part 1242 to fit against the side of the end plate 122 away from the battery cell 121, making the connection between the connecting part 1242 and the end plate 122 more secure.
  • the surface of the connecting portion 1242 near the end plate 122 and the surface of the end plate 122 away from the battery cell 121 can also be a matching arc surface, stepped surface, etc.
  • the strap 123 has a first segment 1231 that is attached to the side of the end plate 122 opposite to the battery cell 121.
  • the connection between the first segment 1231 and the end plate 122 can be made more secure, and the connection strength between the strap 123 and the end plate 122 is higher.
  • the first segment 1231 is less likely to interfere with the battery cell 121, and the possibility of the battery cell 121 being damaged by interference with the first segment 1231 is small.
  • the first segment 1231 and the connecting portion 1242 do not overlap along the first direction X.
  • the possibility of interference between the strap 123 and the tensioning member 124 can be reduced, thereby facilitating the installation of the strap 123 and the tensioning member 124, without further increasing the size of the battery module 120 in the first direction X, which is beneficial to improving the energy density of the battery module 120.
  • the strap 123 further includes a second segment 1232, a third segment 1233, and a fourth segment 1234.
  • the first segment 1232, the third segment 1233, and the fourth segment 1234 are connected in sequence.
  • the first segment 1231 is attached to the side of one of the end plates 122 away from the battery cell 121
  • the third segment 1233 is attached to the side of the other end plate 122 away from the battery cell 121.
  • the second segment 1232 overlaps with the two end plates 122 and the multiple battery cells 121
  • the fourth segment 1234 overlaps with the two end plates 122 and the multiple battery cells 121.
  • the strap 123 can better fix the multiple battery cells 121, making the strap 123 exert stronger restraining force on the battery cells 121 in the first direction X, reducing the possibility of disintegration of the battery cells 121 and the battery module 120, and extending the service life of the battery module 120.
  • the second segment 1232 is attached to the two end plates 122 and the plurality of battery cells 121
  • the fourth segment 1234 is attached to the two end plates 122 and the plurality of battery cells 121.
  • the connection between the second segment 1232, the fourth segment 1234 and the two end plates 122 and the multiple battery cells 121 can be made more secure. This makes the restraining force of the strap 123 on the battery cells 121 in the first direction X stronger, reducing the possibility of disintegration of the battery cells 121 and the battery module 120, and extending the service life of the battery module 120.
  • the third segment 1233 includes a first connecting segment and a second connecting segment (not shown in the figure), at least partially overlapping along a first direction X, and the overlapping portion of the first connecting segment and the second connecting segment is connected.
  • the connection strength between the first connecting segment and the second connecting segment is higher, the strap 123 is not easy to disintegrate, and the strap 123 has a better binding effect on multiple battery cells 121.
  • the overlapping portion of the first connecting segment and the second connecting segment is a welded connection.
  • the connection strength of the first connecting segment and the second connecting segment can be further improved, the strap 123 is not easy to disintegrate, and the strap 123 has a better binding effect on multiple battery cells 121.
  • the overlapping portion of the first connecting segment and the second connecting segment may also be an adhesive connection.
  • the connecting portion 1242 has a first fixing hole 1242a
  • the end plate 122 has a second fixing hole 1221
  • the battery module 120 further includes a first fixing member 125, which passes through the first fixing hole 1242a and is connected to the second fixing hole 1221.
  • the fixing structure between the tensioning member 124 and the end plate 122 can be made simple and easy to manufacture, which is beneficial to improving the manufacturing efficiency of the battery module 120.
  • the second fixing hole 1221 has an internal thread
  • the first fixing member 125 has an external thread
  • the first fixing member 125 is threadedly connected to the second fixing hole 1221.
  • threaded fasteners such as screws, bolts, and nuts
  • various washers to securely connect various components and parts.
  • the connection strength between the first fixing member 125 and the second fixing hole 1221 can be high, making it less likely for the tensioning member 124 to detach from the end plate 122.
  • the tensioning member 124 can better provide restraining force on the multiple battery cells 121 in the first direction X, thereby further reducing the possibility of disintegration of the battery cells 121 and the battery module 120, and extending the service life of the battery module 120.
  • the clamping force between the connecting part 1242 and the end plate 122 can be adjusted by the first fixing member 125, thereby adjusting the tensioning force of the tensioning member 124 on the multiple battery cells 121, so as to adapt to battery modules 120 under different working conditions.
  • first fixing member 125 and the second fixing hole 1221 can also be riveted, adhesive, or otherwise connected.
  • Riveting also known as rivet connection, is a method of connecting multiple parts by using axial force to thicken the shank of a rivet located in the rivet hole of a part and form a rivet head.
  • the first fixing hole 1242a has an internal thread, and the first fixing member 125 is threadedly connected to the first fixing hole 1242a.
  • the connecting part 1242 is less likely to shake between the first fixing member 125 and the end plate 122, the tensioning force of the tensioning member 124 on the multiple battery cells 121 is more stable, and the suppression effect on the multiple battery cells 121 is better.
  • first fastener 125 and the first fixing hole 1242a can also be riveted, adhesive, or otherwise connected.
  • Figure 6 is a partially enlarged structural diagram of point A in the battery module in Figure 4.
  • the end plate 122 is provided with a receiving groove 1222, and the battery module 120 further includes an insert 126.
  • the insert 126 is provided in the receiving groove 1222 and has a third fixing hole 1261.
  • the first fixing member 125 passes through the first fixing hole 1242a and the second fixing hole 1221 and is connected to the third fixing hole 1261.
  • the weight of the end plate 122 can be reduced, thereby reducing the overall weight of the battery module 120.
  • the connection between the tensioning member 124 and the end plate 122 can be made more stable, the tensioning force of the tensioning member 124 on the multiple battery cells 121 can be made more stable, the expansion force of the battery cells 121 in the first direction X can be better suppressed, the possibility of disintegration of the battery cells 121 and the battery module 120 can be reduced, thereby further extending the service life of the battery module 120.
  • the third fixing hole 1261 has an internal thread, and the first fixing member 125 is threadedly connected to the third fixing hole 1261.
  • the insert 126 is less likely to shake in the receiving groove 1222, the tensioning force of the tensioning member 124 on the multiple battery cells 121 is more stable, and the suppression effect on the multiple battery cells 121 is better.
  • first fixing member 125 and the third fixing hole 1261 can also be riveted, bonded, or otherwise connected.
  • the receiving groove 1222 extends through the end plate 122 along the second direction Y.
  • the weight of the end plate 122 can be further reduced, thereby further reducing the overall weight of the battery module 120.
  • the height of the insert 126 is less than or equal to the height of the receiving groove 1222, which can make the space occupied by the insert 126 smaller and help reduce the overall weight of the battery module 120.
  • the height of the insert 126 is greater than the diameter of the first fixing member 125, so that the insert 126 forms a third fixing hole 1261 with a diameter matching that of the first fixing member 125.
  • the receiving groove 1222 is disposed at one end of the end plate 122 near the main body portion 1241 along the second direction Y.
  • the shorter length of the connecting portion 1242 along the second direction Y reduces the likelihood of deformation, thus making the overall structure of the tensioning member 124 more stable. This results in a more stable tension force exerted by the tensioning member 124 on the multiple battery cells 121, better suppressing the expansion force of the battery cells 121 in the first direction X, reducing the possibility of disintegration of the battery cells 121 and the battery module 120, thereby further extending the service life of the battery module 120. Furthermore, it reduces the possibility of interference between the connecting portion 1242 and the strap 123, facilitating the installation of the strap 123 and the tensioning member 124.
  • the receiving groove 1222 may also be disposed in the middle of the end plate 122 along the second direction Y, or it may be disposed at the end of the end plate 122 away from the main body 1241. This allows the overlapping area between the connecting portion 1242 and the end plate 122 in the first direction X to be larger, the connection strength between the connecting portion 1242 and the end plate 122 to be higher, and the tensioning force of the tensioning member 124 on the multiple battery cells 121 to be stronger. This can better suppress the expansion force of the battery cells 121 in the first direction X, reduce the possibility of disintegration of the battery cells 121 and the battery module 120, and thus further extend the service life of the battery module 120.
  • the connecting portion 1242 may be disposed in the receiving groove 1222, and the first fixing member 125 passes through the end plate 122 on the side opposite to the battery cell 121 and is connected to the connecting portion 1242.
  • connecting part 1242 By placing the connecting part 1242 in the receiving groove 1222, it is easy to install the connecting part 1242 and the end plate 122.
  • the battery module 120 may not have the insert 126, and the connecting part 1242 and the end plate 122 may be bonded together with an adhesive.
  • the adhesive between the connecting part 1242 and the end plate 122 may be an insulating adhesive, which can reduce the possibility of short circuits of multiple battery cells 121 through the tensioner 124.
  • the portion where the connecting part 1242 is connected to the end plate 122 may be provided with a buffer layer, which can play a buffering role when the battery module 120 is subjected to force, reducing the possibility that the external force on the connecting part 1242 will cause damage to the battery cell 121.
  • the end plate 122 is provided with a limiting groove (not shown in the figure), and a portion of the strap 123 is accommodated in the limiting groove.
  • a portion of the strap 123 is accommodated in the limiting groove, which makes it less likely for the strap 123 to shift relative to the end plate 122 in the second direction Y.
  • the binding force of the strap 123 on the multiple battery cells 121 in the first direction X is more stable, which can better suppress the expansion force of the battery cells 121 in the first direction X, reduce the possibility of disintegration of the battery cells 121 and the battery module 120, and thus further extend the service life of the battery module 120.
  • the limiting groove can be formed by recessing the outer surface of the end plate 122, which can make the size of the battery module 120 smaller in the first direction X, which is beneficial to improving the energy density of the battery module 120.
  • the outer surface of the end plate 122 may be provided with two protrusions spaced apart along the second direction Y, and a limiting groove is formed between the two protrusions, which simplifies the preparation of the limiting groove.
  • the battery module 120 includes two straps 123, which are spaced apart along a second direction Y.
  • the straps 123 can exert a greater binding force on the multiple battery cells 121 in the first direction X. This can better suppress the expansion force of the battery cells 121 in the first direction X, reduce the possibility of disintegration of the battery cells 121 and the battery module 120, and thus further extend the service life of the battery module 120. Furthermore, the binding force of the straps 123 on the multiple battery cells 121 is distributed in the second direction Y, making the force on the battery cells 121 more uniform and reducing the possibility of damage caused by excessive force on a single part of the battery cell 121.
  • Figure 7 is a perspective view of a portion of the structure of a battery module provided in some other embodiments of this application.
  • the battery module 120 may include a strap 123 disposed on the side of the end plate 122 away from the tensioner 124.
  • the strap 123 and the tensioner 124 can respectively fix multiple battery cells 121 on both sides in the second direction Y, making the force on the battery cells 121 more uniform and reducing the possibility of damage caused by excessive force on a single part of the battery cell 121.
  • the battery module 120 may also include more than two straps 123, such as three or four, with the straps 123 spaced apart along the second direction Y. This further increases the binding force of the straps 123 on the multiple battery cells 121 in the first direction X, better suppressing the expansion force of the battery cells 121 in the first direction X, reducing the possibility of disintegration of the battery cells 121 and the battery module 120, thereby further extending the service life of the battery module 120. Furthermore, the binding force of the straps 123 on the multiple battery cells 121 is distributed along the second direction Y, making the force on the battery cells 121 more uniform, reducing the possibility of damage caused by excessive force on a single part of the battery cell 121.
  • the distance between the two straps 123 is D
  • the length of the battery cell 121 is L, satisfying 1/2 ⁇ D/L ⁇ 3/5.
  • D/L can be 1/2, 11/20, or 3/5, etc.
  • the binding strap 123 can better bind the multiple battery cells 121, and the suppression force on the expansion of the battery cells 121 in the first direction X is stronger, reducing the possibility of disintegration of the battery cells 121 and the battery module 120, and extending the service life of the battery module 120.
  • D/L is less than or equal to 3/5, the possibility of interference between the binding strap 123 and the tensioning member 124 can be reduced, and the possibility of the binding strap 123 detaching from the end plate 122 and the battery cells 121 can be reduced.
  • the binding strap 123 can better bind the multiple battery cells 121, and the suppression force on the expansion of the battery cells 121 in the first direction X is stronger, reducing the possibility of disintegration of the battery cells 121 and the battery module 120, extending the service life of the battery module 120, reducing the possibility of interference between the binding strap 123 and the tensioning member 124, and reducing the possibility of the binding strap 123 detaching from the end plate 122 and the battery cells 121 can be reduced.
  • the first direction X is perpendicular to the surface with the largest area of the battery cell 121.
  • the insertion and extraction of metal ions in the electrode active material of battery cell 121 will cause expansion and contraction of battery cell 121.
  • the volume change of the material during the insertion and extraction of metal ions should be reversible.
  • some metal ions cannot be completely extracted from the anode due to changes in the equilibrium of battery cell 121, or they may deposit on the anode surface as insoluble byproducts during cycling. This will cause irreversible expansion of battery cell 121.
  • Impurities in the electrolyte within battery cell 121 or a low electrochemical window of the electrolyte may cause electrolyte decomposition, generating gas and causing battery cell 121 to expand.
  • the manufacturing process of battery cell 121 may also cause expansion of battery cell 121; for example, poor encapsulation allowing moisture to enter battery cell 121 will also cause expansion of battery cell 121.
  • the battery cell 121 will expand, and this expansion will mainly occur on the surface with the largest area of the battery cell 121.
  • the first direction X is perpendicular to the surface with the largest area of the battery cell 121, allowing the tensioning member 124 and the strap 123 to limit the expansion on the surface with the largest area of multiple battery cells 121. This also strengthens the rigidity of the battery module 120 in the first direction X, further limiting the expansion on the surface with the largest area of multiple battery cells 121.
  • the tensioning member 124 and the strap 123 have a better effect on limiting the expansion of the battery cells 121, further improving the internal cycle performance of the battery cells 121, extending the service life of the battery cells 121, and improving the overall structural stability of the battery module 120.
  • the first direction X can also be perpendicular to the smaller surface area of the battery cell 121, which can also limit the expansion of the battery cell 121, thereby improving the internal cycle performance of the battery cell 121, extending the service life of the battery cell 121, and improving the overall structural stability of the battery module 120.
  • some embodiments of this application provide a battery 100, including the battery module 120 described in any of the above solutions.
  • the battery 100 further includes a housing 110 having an accommodating space, in which at least a portion of the battery module 120 is accommodated.
  • the housing 110 can protect the battery cell 121, reducing the possibility of damage to the battery cell 121 caused by direct force.
  • the end plate 122 is provided with a second through hole 1223, which penetrates the end plate 122 along the second direction Y.
  • the weight of the end plate 122 can be reduced, thereby reducing the overall weight of the battery module 120.
  • the battery 100 further includes a second fixing member (not shown in the figure), which passes through the second through hole 1223 along the first direction X and is connected to the housing 110.
  • the first direction X is perpendicular to the second direction Y.
  • the connection between the end plate 122 and the housing 110 can be facilitated, making it less likely for the battery cell 121 to shake inside the housing 110, and reducing the possibility of damage to the battery cell 121 due to collision with the housing 110.
  • end plate 122 and the housing 110 may also be bonded together.
  • the side of the battery cell 121 facing away from the tensioner 124 is bonded to the housing 110.
  • the connection between the battery cell 121 and the housing 110 can be made more stable, the battery cell 121 is less likely to shake inside the housing 110, and the possibility of damage to the battery cell 121 due to collision with the housing 110 can be reduced.
  • Some embodiments of this application provide an electrical device including a battery 100 as described in any of the above embodiments, the battery 100 being used to provide electrical energy.
  • the electrical device can be any of the aforementioned systems or devices that use battery 100.
  • a battery module 120 which includes a plurality of battery cells 121, two end plates 122, straps 123, tensioning members 124, and inserts 126.
  • the plurality of battery cells 121 are arranged along a first direction X. Arrangement.
  • Two end plates 122 are respectively disposed at both ends of multiple battery cells 121 along the first direction X.
  • a strap 123 is disposed around the battery cells 121 and the end plates 122.
  • An accommodating groove 1222 is provided at one end of the end plate 122 along the second direction Y near the main body 1241, an insert 126 is disposed in the accommodating groove 1222, and both ends of the tensioning member 124 are respectively connected to the two end plates 122 and the insert 126.
  • the battery cell 121 includes a housing 1211 and an end cap 1212.
  • the housing 1211 has an opening at one end along the second direction Y, and the end cap 1212 covers the opening.
  • the tensioning member 124 includes a main body 1241 and two connecting portions 1242.
  • the two connecting portions 1242 are respectively connected to both ends of the main body 1241 and respectively connected to two end plates 122.
  • the connecting portions 1242 are fitted to the side of the end plates 122 opposite to the battery cell 121.
  • the main body 1241 is disposed on the side of the end cap 1212 opposite to the housing 1211.
  • the end cap 1212 is provided with a pressure relief mechanism 1213
  • the main body 1241 is provided with a first through hole 1241a.
  • the first through hole 1241a is an elongated hole extending along the first direction X, and the pressure relief mechanisms 1213 of multiple battery cells 121 are exposed through the first through hole 1241a.
  • the end cap 1212 is provided with two electrode terminals 1214, which are spaced apart along a third direction Z.
  • a pressure relief mechanism 1213 is disposed between the two electrode terminals 1214 along the third direction Z.
  • a tensioning member 124 is disposed between the two electrode terminals 1214 and does not overlap with the electrode terminals 1214 along the second direction Y.
  • the strap 123 has a first segment 1231, a second segment 1232, a third segment 1233, and a fourth segment 1234, which are connected sequentially.
  • the first segment 1231 is attached to the side of one of the end plates 122 away from the battery cell 121
  • the third segment 1233 is attached to the side of the other end plate 122 away from the battery cell 121.
  • the second segment 1232 overlaps with the two end plates 122 and the multiple battery cells 121
  • the fourth segment 1234 overlaps with the two end plates 122 and the multiple battery cells 121.
  • the connecting part 1242 has a first fixing hole 1242a
  • the end plate 122 has a second fixing hole 1221
  • the insert 126 is provided with a third fixing hole 1261
  • the battery module 120 further includes a first fixing member 125.
  • the first fixing hole 1242a is a threaded hole
  • the second fixing hole 1221 is a threaded hole
  • the third fixing hole 1261 is a threaded hole
  • the first fixing member 125 is a screw
  • the first fixing member 125 passes through the first fixing hole 1242a and is threadedly connected to the first fixing hole 1242a
  • the first fixing member 125 passes through the second fixing hole 1221 and is threadedly connected to the second fixing hole 1221
  • the first fixing member 125 is threadedly connected to the third fixing hole 1261.
  • the end plate 122 is provided with a limiting groove, and a portion of the strap 123 is accommodated in the limiting groove.
  • the battery module 120 includes two straps 123, which are spaced apart along a second direction Y.
  • the distance between the two straps 123 along the second direction Y is D, and the length of the battery cell 121 is L, satisfying 1/2 ⁇ D/L ⁇ 3/5.

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

Abstract

一种电池模组(120)、电池(100)以及用电装置，电池模组(120)包括多个电池单体(121)、两个端板(122)、绑带(123)以及拉紧件(124)。多个电池单体(121)沿第一方向排列。两个端板(122)分别设置于多个电池单体(121)沿第一方向的两端。绑带(123)围绕电池单体(121)和端板(122)设置。拉紧件(124)的两端分别与两个端板(122)连接。通过使得绑带(123)围绕电池单体(121)和端板(122)设置，使得绑带(123)能够在第一方向上固定多个电池单体(121)，并且能够减小绑带(123)直接作用于电池单体(121)而造成电池单体(121)受损的可能性；通过使得拉紧件(124)的两端分别与两个端板(122)连接，能够在第一方向上固定多个电池单体(121)；通过绑带(123)和拉紧件(124)共同作用于多个电池单体(121)，能够使得电池单体(121)受到的抑制力更强，解体的可能性更小，使用寿命更长。

Description

电池模组、电池以及用电装置
相关申请的交叉引用
本申请要求享有于2024年05月09日提交的名称为“电池模组、电池以及用电装置”中国专利申请CN202410572470.9的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池技术领域，具体而言，涉及一种电池模组、电池以及用电装置。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。
在电池技术中，如何延长电池的使用寿命，是一个亟待解决的技术问题。
发明内容
本申请实施例提供一种电池模组、电池以及用电装置，能够延长电池的使用寿命。
第一方面，本申请提供一种电池模组，包括多个电池单体、两个端板、绑带以及拉紧件，多个电池单体沿第一方向排列；两个端板分别设置于多个电池单体沿第一方向的两端；绑带围绕电池单体和端板设置；拉紧件的两端分别与两个端板连接。
在上述技术方案中，通过使得电池模组包括多个电池单体，能够使得电池模组的放电容量较大，适用范围较广；通过使得多个电池单体沿第一方向排列，能够使得电池模组的整体结构紧凑，有利于提高电池模组的能量密度；通过使得两个端板分别设置于多个电池单体沿第一方向的两端，能够在第一方向上起到对电池单体的保护作用；通过使得绑带围绕电池单体和端板设置，使得绑带能够在第一方向上固定多个电池单体，抑制电池单体在第一方向上的膨胀力，减小电池单体及电池模组解体的可能性，能够延长电池模组的使用寿命，并且绑带与电池模组在第一方向上的两端的端板直接接触，能够减小绑带直接作用于电池单体而造成电池单体受损的可能性；通过使得拉紧件的两端分别与两个端板连接，能够在第一方向上固定多个电池单体，抑制电池单体在第一方向上的膨胀力，减小电池单体及电池模组解体的可能性，能够延长电池模组的使用寿命，并且拉紧件还能够提高电池模组在第一方向上的受力强度，能够减小电池模组在第一方向上受力导致电池单体受损的可能性，提高电池模组整体结构的稳定性，有利于进一步延长电池模组的使用寿命；因此，通过绑带和拉紧件共同作用于多个电池单体，能够使得电池单体在第一方向上受到的抑制力更强，电池单体及电池模组解体的可能性更小，电池模组的使用寿命更长。
在本申请的一些实施例中，电池单体包括壳体和端盖，壳体沿第二方向的一端具有开口，端盖盖设于开口；拉紧件包括主体部和两个连接部，两个连接部分别连接于主体部的两端，两个连接部分别与两个端板连接，沿第二方向，主体部设置于端盖背向壳体的一侧；第一方向与第二方向垂直。
在上述技术方案中，电池单体包括壳体和端盖，壳体沿第二方向的一端具有开口，使得电池单体的电极组件能够从开口装入壳体内，端盖盖设于开口，能够将电池单体的内部空间密封，减小电池单体的电解液泄漏或外部水汽进入电极组件的可能性；拉紧件包括主体部和两个连接部，两个连接部分别连接于主体部的两端，两个连接部分别与两个端板连接，使得拉紧件能够向多个电池单体提供沿第一方向的拉紧力；沿第二方向，主体部设置于端盖背向壳体的一侧，能够便于拉紧件与端板连接，并且主体部能够在第二方向上起到对端盖的阻挡作用，减小端盖与壳体解体分离的可能性，延长电池模组的使用寿命。
在本申请的一些实施例中，端盖上设置有泄压机构，主体部设置有第一通孔，泄压机构由第一通孔露出。
在上述技术方案中，通过使得端盖上的泄压机构由主体部的第一通孔露出，能够减小拉紧件遮挡泄压机构的可能性，使得泄压机构能够经第一通孔实现泄压，有利于提高泄压机构的泄压速度，提高泄压机构的可靠性，减小电池模组产生热失控甚至爆炸的可能性。
在本申请的一些实施例中，第一通孔为沿第一方向延伸的长条孔，多个电池单体的泄压机 构均由第一通孔露出。
在上述技术方案中，第一通孔为沿第一方向延伸的长条孔，多个电池单体的泄压机构均由第一通孔露出，能够便于第一通孔的制备，且第一通孔的面积较大，有利于进一步提高泄压机构的泄压速度，提高泄压机构的可靠性，减小电池模组产生热失控甚至爆炸的可能性。
在本申请的一些实施例中，连接部与端板背离电池单体的一侧贴合。
在上述技术方案中，连接部与端板背离电池单体的一侧贴合，能够使得连接部与端板的连接更加紧固，连接强度更高，进而使得拉紧件对电池单体在第一方向上的抑制力更强，能够减小电池单体及电池模组解体的可能性，能够延长电池模组的使用寿命；且连接部不易与电池单体产生干涉，电池单体与连接部干涉受损的可能性较小。
在本申请的一些实施例中，绑带具有第一段，第一段与端板背离电池单体的一侧贴合，沿第一方向，第一段与连接部不重叠。
在上述技术方案中，通过使得绑带的第一段与端板背离电池单体的一侧贴合，能够使得第一段与端板的连接更加紧固，绑带与端板的连接强度更高，进而使得绑带对电池单体在第一方向上的抑制力更强，能够减小电池单体及电池模组解体的可能性，能够延长电池模组的使用寿命；且第一段不易与电池单体产生干涉，电池单体与第一段干涉受损的可能性较小；通过使得沿第一方向，第一段与连接部不重叠，能够减小绑带与拉紧件产生干涉的可能性，从而便于绑带、拉紧件的安装，且不会进一步增加电池模组在第一方向上的尺寸，有利于提高电池模组的能量密度。
在本申请的一些实施例中，连接部具有第一固定孔，端板具有第二固定孔，电池模组还包括第一固定件，第一固定件贯穿第一固定孔，并与第二固定孔连接。
在上述技术方案中，通过使得第一固定件贯穿连接部的第一固定孔，并与端板的第二固定孔连接，能够使得拉紧件与端板之间的固定结构简单、易于制备，有利于提高电池模组的制备效率。
在本申请的一些实施例中，端板设置有容置槽，电池模组还包括嵌件，嵌件设置于容置槽，嵌件设置有第三固定孔，第一固定件贯穿第一固定孔和第二固定孔，并与第三固定孔连接。
在上述技术方案中，通过在端板设置容置槽，能够减小端板的重量，从而减小电池模组的整体重量；通过设置嵌件，并使得嵌件设置于容置槽，第一固定件贯穿第一固定孔和第二固定孔，并与嵌件的第三固定孔连接，能够使得拉紧件与端板的连接更加稳固，使得拉紧件对多个电池单体的拉紧力更加稳定，能够更好地抑制电池单体在第一方向上的膨胀力，减小电池单体及电池模组解体的可能性，从而能够进一步延长电池模组的使用寿命。
在本申请的一些实施例中，容置槽设置在端板沿第二方向靠近主体部的一端。
在上述技术方案中，通过使得容置槽设置在端板沿第二方向靠近主体部的一端，能够使得连接部沿第二方向的长度较短，连接部产生形变的可能性较小，从而使得拉紧件的整体结构更加稳固，使得拉紧件对多个电池单体的拉紧力更加稳定，能够更好地抑制电池单体在第一方向上的膨胀力，减小电池单体及电池模组解体的可能性，从而能够进一步延长电池模组的使用寿命；并且能够减小连接部与绑带产生干涉的可能性，从而便于绑带、拉紧件的安装。
在本申请的一些实施例中，端板设置有限位槽，绑带的部分容置于限位槽。
在上述技术方案中，通过在端板设置限位槽，使得绑带的部分容置于限位槽，能够使得绑带在第二方向上不易相对端板产生位移，绑带在第一方向上对多个电池单体的束缚力更加稳定，能够更好地抑制电池单体在第一方向上的膨胀力，减小电池单体及电池模组解体的可能性，从而能够进一步延长电池模组的使用寿命。
在本申请的一些实施例中，电池模组包括两根绑带，两根绑带沿第二方向间隔设置。
在上述技术方案中，通过设置两根绑带，使得两根绑带沿第二方向间隔设置，能够使得绑带对多个电池单体在第一方向上的束缚力更大，能够更好地抑制电池单体在第一方向上的膨胀力，减小电池单体及电池模组解体的可能性，从而能够进一步延长电池模组的使用寿命；并且绑带对多个电池单体的束缚力在第二方向上分布，使得电池单体的受力更加均匀，减小电池单体的单个部位受力过大而造成损伤的可能性。
在本申请的一些实施例中，沿第二方向，两根绑带的间隔距离为D，电池单体的长度为L，满足1/2≤D/L≤3/5。
在上述技术方案中，当D/L大于或等于1/2，能够使得绑带对多个电池单体的束缚效果更好，对电池单体在第一方向上的膨胀的抑制力更强，减小电池单体及电池模组解体的可能性，能够 延长电池模组的使用寿命；当D/L小于或等于3/5，能够减小绑带与拉紧件干涉的可能性，并且能够减小绑带脱离端板和电池单体的可能性；因此，当1/2≤D/L≤3/5，既能够使得绑带对多个电池单体的束缚效果更好，对电池单体在第一方向上的膨胀的抑制力更强，减小电池单体及电池模组解体的可能性，能够延长电池模组的使用寿命，又能够减小绑带与拉紧件干涉的可能性，并且能够减小绑带脱离端板和电池单体的可能性。
第二方面，本申请提供一种电池，包括以上任一方案所述的电池模组。
在本申请的一些实施例中，电池还包括箱体，箱体设置有容置空间，电池模组的至少部分容置于容置空间。
在上述技术方案中，通过设置箱体，并使得电池模组的至少部分容置于箱体的容置空间，使得箱体能够起到对电池单体的保护作用，减小电池单体直接受力而造成受损的可能性。
在本申请的一些实施例中，端板设置有第二通孔，第二通孔沿第二方向贯穿端板，电池还包括第二固定件，第二固定件沿第一方向贯穿第二通孔并与箱体连接；第一方向与第二方向垂直。
在上述技术方案中，通过使得第二通孔沿第二方向贯穿端板，并使得第二固定件沿第一方向贯穿第二通孔并与箱体连接，能够便于端板与箱体的连接，使得电池单体不易在箱体内晃动，能够减小电池单体与箱体碰撞而造成电池单体受损的可能性；并且第二通孔能够减小端板的重量，从而减小电池模组的整体重量。
在本申请的一些实施例中，电池单体背向拉紧件的一侧与箱体粘接连接。
在上述技术方案中，通过使得电池单体背向拉紧件的一侧与箱体粘接连接，能够使得电池单体与箱体的连接更加稳固，电池单体不易在箱体内晃动，能够减小电池单体与箱体碰撞而造成电池单体受损的可能性。
第三方面，本申请提供一种用电装置，包括以上任一方案所述的电池，所述电池用于提供电能。
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，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，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，还可以根据这些附图获得其他相关的附图。
图1是本申请一些实施例提供的车辆的结构示意图；
图2是本申请一些实施例提供的电池的爆炸结构示意图；
图3是本申请一些实施例提供的电池模组的立体结构示意图；
图4是本申请一些实施例提供的电池模组的爆炸结构示意图；
图5是本申请一些实施例提供的电池模组的电池单体的立体结构示意图；
图6是图4中电池模组的A处的局部放大结构示意图；
图7是本申请另一些实施例提供的电池模组的部分结构的立体示意图。
图标：1000-车辆；100-电池；110-箱体；111-第一子箱体；112-第二子箱体；120-电池模组；121-电池单体；1211-壳体；1212-端盖；1213-泄压机构；1214-电极端子；122-端板；1221-第二固定孔；1222-容置槽；1223-第二通孔；123-绑带；1231-第一段；1232-第二段；1233-第三段；1234-第四段；124-拉紧件；1241-主体部；1241a-第一通孔；1242-连接部；1242a-第一固定孔；125-第一固定件；126-嵌件；1261-第三固定孔；200-控制器；300-马达；X-第一方向；Y-第二方向；Z-第三方向。
具体实施例方式
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。
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、锂离子一次电池、锂硫电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。电池单体可呈扁平体、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模块或电池包等。电池一般还可以包括用于封装一个或多个电池单体或多个电池模块的箱体。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，电极组件由正极极片、负极极片和隔离膜组成。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极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，未涂覆正极活性物质层的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，未涂覆负极活性物质层的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。隔离膜的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。
电池具有能量密度高、环境污染小、功率密度大、使用寿命长、适应范围广、自放电系数小等突出的优点，是现今新能源发展的重要组成部分。随着新能源行业的发展，电池逐步朝着大型化、集成化方向发展。
然而，沿第一方向排列的大量电池单体堆叠在一起，会造成电池单体产生膨胀时，沿第一方向的压力过大，会增加电池模组及电池单体解体的可能性，使得电池的使用寿命较短。
基于以上考虑，本申请提供了一种电池模组，电池模组多个电池单体、两个端板、绑带以及拉紧件，多个电池单体沿第一方向排列；两个端板分别设置于多个电池单体沿第一方向的两端；绑带围绕电池单体和端板设置；拉紧件的两端分别与两个端板连接。
本申请技术方案中，通过使得电池模组包括多个电池单体，能够使得电池模组的放电容量较大，适用范围较广；通过使得多个电池单体沿第一方向排列，能够使得电池模组的整体结构紧凑，有利于提高电池模组的能量密度；通过使得两个端板分别设置于多个电池单体沿第一方向的两端，能够在第一方向上起到对电池单体的保护作用；通过使得绑带围绕电池单体和端板设置，使得绑带能够在第一方向上固定多个电池单体，抑制电池单体在第一方向上的膨胀力，减小电池单体及电池模组解体的可能性，能够延长电池模组的使用寿命，并且绑带与电池模组在第一方向上的两端的端板直接接触，能够减小绑带直接作用于电池单体而造成电池单体受损的可能性；通过使得拉紧件的两端分别与两个端板连接，能够在第一方向上固定多个电池单体，抑制电池单体在第一方向上的膨胀力，减小电池单体及电池模组解体的可能性，能够延长电池模组的使用寿命，并且拉紧件还能够提高电池模组在第一方向上的受力强度，能够减小电池模组在第一方向上受力导致电池单体受损的可能性，提高电池模组整体结构的稳定性，有利于进一步延长电池模组的使用寿命；因此，通过绑带和拉紧件共同作用于多个电池单体，能够使得电池单体在第一方向上受到的抑制力更强，电池单体及电池模组解体的可能性更小，电池模组的使用寿命更长。
本申请实施例公开的电池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组成该用电装置的电源系统。
本申请实施例提供一种使用电池作为电源的用电装置，用电装置可以为但不限于电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
本申请的实施例描述的电池不仅仅局限适用于上述所描述的用电装置，还可以适用于所有 使用电池的用电装置，但为描述简洁，以下实施例以一种用电装置为车辆为例进行说明。
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100，电池100可以设置在车辆1000的底部或头部或尾部。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用来控制电池100为马达300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电池的爆炸结构示意图。
电池100包括箱体110和电池模组120，电池模组120包括多个电池单体121，电池单体121容纳于箱体110内。其中，箱体110用于为电池单体121提供容置空间，箱体110可以采用多种结构。在一些实施例中，箱体110可以包括第一子箱体111和第二子箱体112，第一子箱体111与第二子箱体112相互盖合，第一子箱体111和第二子箱体112共同限定出用于容纳电池单体121的容置空间。第一子箱体111可以为一端开口的空心结构，第二子箱体112可以为板状结构，第二子箱体112盖合于第一子箱体111的开口侧，以使第一子箱体111与第二子箱体112共同限定出容置空间；第一子箱体111和第二子箱体112也可以是均为一侧开口的空心结构，第二子箱体112的开口侧盖合于第一子箱体111的开口侧。
在一些实施例中，箱体110可以为长方体。
在另一些实施例中，箱体110也可以为圆柱体。
在一些实施例中，箱体110可以由铝、铝合金或其他金属材料制成，使得箱体110具有较高的受力性能。
在另一些实施例中，箱体110也可以为碳纤维、硬质塑料等强度较高的非金属材料。
请参照图3和图4，图3为本申请一些实施例提供的电池模组的立体结构示意图；图4为本申请一些实施例提供的电池模组的爆炸结构示意图。
本申请一些实施例提供了一种电池模组120，电池模组120包括多个电池单体121、两个端板122、绑带123以及拉紧件124。多个电池单体121沿第一方向X排列。两个端板122分别设置于多个电池单体121沿第一方向X的两端。绑带123围绕电池单体121和端板122设置。拉紧件124的两端分别与两个端板122连接。
通过使得电池模组120包括多个电池单体121，能够使得电池模组120的放电容量较大，适用范围较广。通过使得多个电池单体121沿第一方向X排列，能够使得电池模组120的整体结构紧凑，有利于提高电池模组120的能量密度。通过使得两个端板122分别设置于多个电池单体121沿第一方向X的两端，能够在第一方向X上起到对电池单体121的保护作用。通过使得绑带123围绕电池单体121和端板122设置，使得绑带123能够在第一方向X上固定多个电池单体121，抑制电池单体121在第一方向X上的膨胀力，减小电池单体121及电池模组120解体的可能性，能够延长电池模组120的使用寿命，并且绑带123与电池模组120在第一方向X上的两端的端板122直接接触，能够减小绑带123直接作用于电池单体121而造成电池单体121受损的可能性。通过使得拉紧件124的两端分别与两个端板122连接，能够在第一方向X上固定多个电池单体121，抑制电池单体121在第一方向X上的膨胀力，减小电池单体121及电池模组120解体的可能性，能够延长电池模组120的使用寿命，并且拉紧件124还能够提高电池模组120在第一方向X上的受力强度，能够减小电池模组120在第一方向X上受力导致电池单体121受损的可能性，提高电池模组120整体结构的稳定性，有利于进一步延长电池模组120的使用寿命。因此，通过绑带123和拉紧件124共同作用于多个电池单体121，能够使得电池单体121在第一方向X上受到的抑制力更强，电池单体121及电池模组120解体的可能性更小，电池模组120的使用寿命更长。
在一些实施例中，电池单体121可以呈长方体，使得多个电池单体121能够呈矩阵紧密排列，有利于提高电池模组120的能量密度。
在另一些实施例中，电池单体121也可以呈扁平体、圆柱体或其它形状。
在一些实施例中，电池模组120中，多个电池单体121之间可串联或并联或混联，混联是指多个电池单体121中既有串联又有并联。多个电池单体121之间可直接串联或并联或混联在一起，再将多个电池单体121构成的电池模组120容纳于箱体110内。当然，电池模组120也可以是 多个电池单体121先串联或并联或混联组成电池单体组模块的形式，多个电池单体组模块再串联或并联或混联形成一个整体，再容纳于箱体110内。
请参照图3至图5，图5为本申请一些实施例提供的电池模组的电池单体的立体结构示意图。
在一些实施例中，电池单体121包括壳体1211和端盖1212，壳体1211沿第二方向Y的一端具有开口(图中未示出)，端盖1212盖设于开口。
通过使得电池单体121包括壳体1211和端盖1212，壳体1211沿第二方向Y的一端具有开口，使得电池单体121的电极组件能够从开口装入壳体1211内，端盖1212盖设于开口，能够将电池单体121的内部空间密封，减小电池单体121的电解液泄漏或外部水汽进入电极组件的可能性。
在一些实施例中，端盖1212为板状结构，壳体1211和端盖1212共同限定出用于容置电极组件(图中未示出)和电解液的容置空间。
在另一些实施例中，壳体1211和端盖1212都可以为一侧开口的空心结构，端盖1212的开口侧盖合于壳体1211的开口侧，以共同形成容置空间。
在一些实施例中，壳体1211和端盖1212可以通过焊接方式连接。
在另一些实施例中，壳体1211和端盖1212也可以通过粘接、过盈配合等方式固定连接。
在一些实施例中，壳体1211和端盖1212组成的外壳可以为长方体。
在另一些实施例中，外壳也可以为圆柱体。
在一些实施例中，壳体1211和端盖1212可以由铝、铝合金或其他金属材料制成，能够使得电池单体121具有更高的受力性能。
在一些实施例中，拉紧件124包括主体部1241和两个连接部1242，两个连接部1242分别连接于主体部1241的两端，两个连接部1242分别与两个端板122连接，沿第二方向Y，主体部1241设置于端盖1212背向壳体1211的一侧。第一方向X与第二方向Y垂直。
通过使得拉紧件124包括主体部1241和两个连接部1242，两个连接部1242分别连接于主体部1241的两端，两个连接部1242分别与两个端板122连接，使得拉紧件124能够向多个电池单体121提供沿第一方向X的拉紧力；沿第二方向Y，主体部1241设置于端盖1212背向壳体1211的一侧，能够便于拉紧件124与端板122连接，并且主体部1241能够在第二方向Y上起到对端盖1212的阻挡作用，减小端盖1212与壳体1211解体分离的可能性，延长电池模组120的使用寿命。
在一些实施例中，主体部1241可以呈板状设置。
在另一些实施例中，主体部1241也可以为空心型材或异形型材制成。
在一些实施例中，拉紧件124可以由铝、铝合金或其他金属材料制成，能够使得拉紧件124具有更高的受力性能。由于主体部1241设置于端盖1212背向壳体1211的一侧，使得电池模组120设置有拉紧件124的一侧受力时，外力不直接作用于电池单体121，拉紧件124能够起到电池单体121的保护作用。
在一些实施例中，拉紧件124外可以包覆有绝缘层，能够减小多个电池单体121通过拉紧件124短路的可能性。
在另一些实施例中，拉紧件124也可以为碳纤维、硬质塑料等强度较高的非金属材料，能够减小多个电池单体121通过拉紧件124短路的可能性。
在一些实施例中，绑带123可以由铝、铝合金或其他金属材料制成，能够使得绑带123对多个电池单体121的抑制力更强。
在一些实施例中，端盖1212上设置有泄压机构1213，主体部1241设置有第一通孔1241a，泄压机构1213由第一通孔1241a露出。
通过使得端盖1212上的泄压机构1213由主体部1241的第一通孔1241a露出，能够减小拉紧件124遮挡泄压机构1213的可能性，使得泄压机构1213能够经第一通孔1241a实现泄压，有利于提高泄压机构1213的泄压速度，提高泄压机构1213的可靠性，减小电池模组120产生热失控甚至爆炸的可能性。
在一些实施例中，泄压机构1213可以通过焊接、粘接等方式与端盖1212固定连接，也可以与端盖1212一体成形设置。
在一些实施例中，沿第二方向Y，拉紧件124与电池单体121间隔。
通过使得沿第二方向Y，拉紧件124与电池单体121间隔，能够减小拉紧件124受到的外 力作用于泄压机构1213的可能性，从而减小泄压机构1213被破坏造成提前泄压的可能性，起到对泄压机构1213的保护作用，并且能够减小电池单体121因直接受力导致受损甚至解体的可能性。
在一些实施例中，主体部1241的长度方向与第一方向X平行。
主体部1241的长度方向与第一方向X平行，使得连接于两个端板122之间的拉紧件124的作用力与第一方向X平行，即拉紧件124的作用力全部作用于第一方向X，减少拉紧件124的作用力作用于其他方向而造成第一方向X上的力较小的问题，能够更好地限制多个电池单体121沿第一方向X的膨胀，从而进一步改善电池单体121的内部循环性能，延长电池单体121的使用寿命，提高电池模组120整体结构的稳定性。
在一些实施例中，第一通孔1241a为沿第一方向X延伸的长条孔，多个电池单体121的泄压机构1213均由第一通孔1241a露出。
通过使得第一通孔1241a为沿第一方向X延伸的长条孔，多个电池单体121的泄压机构1213均由第一通孔1241a露出，能够便于第一通孔1241a的制备，且第一通孔1241a的面积较大，有利于进一步提高泄压机构1213的泄压速度，提高泄压机构1213的可靠性，减小电池模组120产生热失控甚至爆炸的可能性。
在另一些实施例中，第一通孔1241a的数量可以为多个，多个第一通孔1241a沿第一方向X间隔设置，至少一个电池单体121的泄压机构1213由一个对应的第一通孔1241a露出。
通过设置多个第一通孔1241a，能够使得拉紧件124更不易变形，受力性能更强。
在一些实施例中，端盖1212上设置有电极端子1214，沿第二方向Y，拉紧件124与电极端子1214不重叠。
通过使得沿第二方向Y，拉紧件124与电极端子1214不重叠，能够便于电池100的其他部件与电极端子1214连接，减小拉紧件124与其他部件产生干涉的可能性，从而有利于提高电池100的制备效率。
电极端子1214是设置于外壳端盖1212上的金属部件，可以由铜镀银、铜镀锌、铜、铝、铁等金属材料制成，能够起到导电和传递电信号的作用。
在一些实施例中，电极端子1214可以呈长方体设置。
在另一些实施例中，电极端子1214也可以呈圆柱体、椭圆柱体等形状设置。
在一些实施例中，泄压机构1213可以设置于端盖1212的中部，位于两个电极端子1214之间，便于电池单体121内的压力过大时，电池单体121内的气体经泄压机构1213释放。
在另一些实施例中，泄压机构1213也可以设置于端盖1212的端部。
在另一些实施例中，电极端子1214也可以设置于壳体1211上。
在另一些实施例中，泄压机构1213也可以设置于壳体1211上。
在另一些实施例中，电极端子1214与泄压机构1213也可以设置于电池单体121的不同壁，拉紧件124不会遮挡泄压机构1213，便于泄压机构1213进行泄压，提高泄压机构1213的可靠性。
在另一些实施例中，拉紧件124上可以不设置通孔，沿第二方向Y，拉紧件124与泄压机构1213、电极端子1214不重叠。
通过使得拉紧件124上不设置通孔，能够使得拉紧件124的制备更加简单，有利于提高电池模组120的制备效率。通过使得沿第二方向Y，拉紧件124与泄压机构1213、电极端子1214不重叠，能够便于泄压机构1213进行泄压，便于电池100的其他部件与电极端子1214连接，减小拉紧件124与其他部件产生干涉的可能性，从而有利于提高电池100的制备效率。
在另一些实施例中，拉紧件124的数量可以为多个，多个拉紧件124沿第三方向Z间隔设置。
通过设置多个拉紧件124，能够使得多个拉紧件124在第一方向X上对电池单体121在第一方向X上的抑制力更强，能够进一步减小电池单体121及电池模组120解体的可能性，进一步延长电池模组120的使用寿命。
在另一些实施例中，沿第二方向Y，多个拉紧件124与电极端子1214都不重叠。
通过使得沿第二方向Y，多个拉紧件124与电极端子1214都不重叠。
能够便于电池100的其他部件与电极端子1214连接，减小拉紧件124与其他部件产生干涉的可能性，从而有利于提高电池100的制备效率。
在一些实施例中，连接部1242与端板122背离电池单体121的一侧贴合。
连接部1242与端板122背离电池单体121的一侧贴合，能够使得连接部1242与端板122的连接更加紧固，连接强度更高，进而使得拉紧件124对电池单体121在第一方向X上的抑制力更强，能够减小电池单体121及电池模组120解体的可能性，能够延长电池模组120的使用寿命；且连接部1242不易与电池单体121产生干涉，电池单体121与连接部1242干涉受损的可能性较小。
在另一些实施例中，连接部1242也可以与端板122靠近电池单体121的一侧贴合。
在一些实施例中，连接部1242靠近端板122的表面为平面，端板122背离电池单体121的表面为平面。
通过使得连接部1242靠近端板122的表面为平面，端板122背离电池单体121的表面为平面，能够便于连接部1242与端板122背离电池单体121的一侧贴合，使得连接部1242与端板122的连接更加紧固。
在另一些实施例中，连接部1242靠近端板122的表面、端板122背离电池单体121的表面还可以为匹配的弧面、台阶面等。
在一些实施例中，绑带123具有第一段1231，第一段1231与端板122背离电池单体121的一侧贴合。
通过使得绑带123的第一段1231与端板122背离电池单体121的一侧贴合，能够使得第一段1231与端板122的连接更加紧固，绑带123与端板122的连接强度更高，进而使得绑带123对电池单体121在第一方向X上的抑制力更强，能够减小电池单体121及电池模组120解体的可能性，能够延长电池模组120的使用寿命；且第一段1231不易与电池单体121产生干涉，电池单体121与第一段1231干涉受损的可能性较小。
在一些实施例中，沿第一方向X，第一段1231与连接部1242不重叠。
通过使得沿第一方向X，第一段1231与连接部1242不重叠，能够减小绑带123与拉紧件124产生干涉的可能性，从而便于绑带123、拉紧件124的安装，且不会进一步增加电池模组120在第一方向X上的尺寸，有利于提高电池模组120的能量密度。
在一些实施例中，绑带123还具有第二段1232、第三段1233以及第四段1234，第一段、第二段1232、第三段1233以及第四段1234依次连接，第一段1231与其中一个端板122背离电池单体121的一侧贴合，第三段1233与另一个端板122背离电池单体121的一侧贴合，沿第三方向Z，第二段1232与两个端板122、多个电池单体121重叠，第四段1234与两个端板122、多个电池单体121重叠。
通过使得第一段1231与其中一个端板122背离电池单体121的一侧贴合，第三段1233与另一个端板122背离电池单体121的一侧贴合，沿第三方向Z，第二段1232与两个端板122、多个电池单体121重叠，第四段1234与两个端板122、多个电池单体121重叠，使得绑带123能够更好地对多个电池单体121固定，使得绑带123对电池单体121在第一方向X上的抑制力更强，减小电池单体121及电池模组120解体的可能性，延长电池模组120的使用寿命。
在一些实施例中，第二段1232与两个端板122、多个电池单体121贴合，第四段1234与两个端板122、多个电池单体121贴合。
通过使得第二段1232与两个端板122、多个电池单体121贴合，第四段1234与两个端板122、多个电池单体121贴合，能够使得第二段1232、第四段1234与两个端板122、多个电池单体121的连接更加紧固，使得绑带123对电池单体121在第一方向X上的抑制力更强，减小电池单体121及电池模组120解体的可能性，延长电池模组120的使用寿命。
在一些实施例中，第三段1233包括第一连接段和第二连接段(图中未标出)，沿第一方向X，第一连接段和第二连接段的至少部分重叠，且第一连接段与第二连接段的重叠部分连接。
通过使得第一连接段与第二连接段的重叠部分连接，能够使得第一连接段和第二连接段的连接强度较高，绑带123不易解体，绑带123对多个电池单体121的束缚效果更好。
在一些实施例中，第一连接段与第二连接段的重叠部分为焊接连接。
通过使得第一连接段与第二连接段的重叠部分为焊接连接，能够进一步使得第一连接段和第二连接段的连接强度较高，绑带123不易解体，绑带123对多个电池单体121的束缚效果更好。
在另一些实施例中，第一连接段与第二连接段的重叠部分还可以为粘接连接。
在一些实施例中，连接部1242具有第一固定孔1242a，端板122具有第二固定孔1221，电池模组120还包括第一固定件125，第一固定件125贯穿第一固定孔1242a，并与第二固定孔1221连接。
通过使得第一固定件125贯穿连接部1242的第一固定孔1242a，并与端板122的第二固定孔1221连接，能够使得拉紧件124与端板122之间的固定结构简单、易于制备，有利于提高电池模组120的制备效率。
在一些实施例中，第二固定孔1221具有内螺纹，第一固定件125具有外螺纹，第一固定件125与第二固定孔1221螺纹连接。
用螺纹连接件(如螺钉、螺栓、螺母)及各种垫圈将各种元器件、零部件紧固地连接起来，称为螺纹连接。
通过使得第二固定孔1221具有内螺纹，第一固定件125具有外螺纹，第一固定件125与第二固定孔1221螺纹连接，能够使得第一固定件125与第二固定孔1221的连接强度较高，使得拉紧件124不易脱离端板122，拉紧件124能够更好地在第一方向X上提供对多个电池单体121的抑制力，从而进一步减小电池单体121及电池模组120解体的可能性，延长电池模组120的使用寿命。并且通过第一固定件125还可以调节连接部1242与端板122之间的挤压力，从而能够调节拉紧件124对多个电池单体121的拉紧力，以便于适用不同工况的电池模组120。
在另一些实施例中，第一固定件125与第二固定孔1221还可以为铆接连接、粘接连接等。
铆接，即铆钉连接，是利用轴向力将位于零件铆钉孔内的钉杆墩粗并形成钉头，使多个零件相连接的方法。
在一些实施例中，第一固定孔1242a具有内螺纹，第一固定件125与第一固定孔1242a螺纹连接。
通过使得第一固定孔1242a具有内螺纹，第一固定件125与第一固定孔1242a螺纹连接，能够使得连接部1242不易在第一固定件125和端板122之间晃动，拉紧件124对多个电池单体121的拉紧力更加稳定，对多个电池单体121的抑制力效果更好。
在另一些实施例中，第一固定件125与第一固定孔1242a还可以为铆接连接、粘接连接等。
请参照图3、图4和图6，图6为图4中电池模组的A处的局部放大结构示意图。
在一些实施例中，端板122设置有容置槽1222，电池模组120还包括嵌件126，嵌件126设置于容置槽1222，嵌件126设置有第三固定孔1261，第一固定件125贯穿第一固定孔1242a和第二固定孔1221，并与第三固定孔1261连接。
通过在端板122设置容置槽1222，能够减小端板122的重量，从而减小电池模组120的整体重量。通过设置嵌件126，并使得嵌件126设置于容置槽1222，第一固定件125贯穿第一固定孔1242a和第二固定孔1221，并与嵌件126的第三固定孔1261连接，能够使得拉紧件124与端板122的连接更加稳固，使得拉紧件124对多个电池单体121的拉紧力更加稳定，能够更好地抑制电池单体121在第一方向X上的膨胀力，减小电池单体121及电池模组120解体的可能性，从而能够进一步延长电池模组120的使用寿命。
在一些实施例中，第三固定孔1261具有内螺纹，第一固定件125与第三固定孔1261螺纹连接。
通过使得第三固定孔1261具有内螺纹，第一固定件125与第三固定孔1261螺纹连接，能够使得嵌件126不易在容置槽1222内晃动，拉紧件124对多个电池单体121的拉紧力更加稳定，对多个电池单体121的抑制力效果更好。
在另一些实施例中，第一固定件125与第三固定孔1261还可以为铆接连接、粘接连接等。
在一些实施例中，容置槽1222沿第二方向Y贯穿端板122。
通过使得容置槽1222沿第二方向Y贯穿端板122，能够进一步减小端板122的重量，从而进一步减小电池模组120的整体重量。
在一些实施例中，沿第二方向Y，嵌件126的高度小于或等于容置槽1222的高度，能够使得嵌件126占用的空间较小，有利于减小电池模组120的整体重量。
在一些实施例中，沿第二方向Y，嵌件126的高度大于第一固定件125的直径，以便于嵌件126形成直径与第一固定件125匹配的第三固定孔1261。
在一些实施例中，容置槽1222设置在端板122沿第二方向Y靠近主体部1241的一端。
通过使得容置槽1222设置在端板122沿第二方向Y靠近主体部1241的一端，能够使得连 接部1242沿第二方向Y的长度较短，连接部1242产生形变的可能性较小，从而使得拉紧件124的整体结构更加稳固，使得拉紧件124对多个电池单体121的拉紧力更加稳定，能够更好地抑制电池单体121在第一方向X上的膨胀力，减小电池单体121及电池模组120解体的可能性，从而能够进一步延长电池模组120的使用寿命；并且能够减小连接部1242与绑带123产生干涉的可能性，从而便于绑带123、拉紧件124的安装。
在另一些实施例中，容置槽1222也可以设置在端板122沿第二方向Y的中部，或者也可以设置在端板122远离主体部1241的一端。能够使得连接部1242在第一方向X上与端板122的重叠面积更大，连接部1242与端板122的连接强度更高，拉紧件124对多个电池单体121的拉紧力更强，能够更好地抑制电池单体121在第一方向X上的膨胀力，减小电池单体121及电池模组120解体的可能性，从而能够进一步延长电池模组120的使用寿命。
在另一些实施例中，连接部1242可以设置于容置槽1222，第一固定件125贯穿端板122背离电池单体121的一侧并与连接部1242连接。
通过使得连接部1242设置于容置槽1222，能够便于连接部1242与端板122的安装。
在另一些实施例中，电池模组120也可以不设置嵌件126，连接部1242与端板122可以通过胶体粘接连接。其中，连接部1242与端板122之间的胶体可以为绝缘胶，能够减小多个电池单体121通过拉紧件124短路的可能性。
在另一些实施例中，连接部1242与端板122连接的部分可以设置有缓冲层，能够在电池模组120受力时起到缓冲作用，减小连接部1242受到的外力作用于端板122造成电池单体121受损的可能性。
在一些实施例中，端板122设置有限位槽(图中未示出)，绑带123的部分容置于限位槽。
通过在端板122设置限位槽，使得绑带123的部分容置于限位槽，能够使得绑带123在第二方向Y上不易相对端板122产生位移，绑带123在第一方向X上对多个电池单体121的束缚力更加稳定，能够更好地抑制电池单体121在第一方向X上的膨胀力，减小电池单体121及电池模组120解体的可能性，从而能够进一步延长电池模组120的使用寿命。
在一些实施例中，限位槽可以由端板122的外表面凹陷形成，能够使得电池模组120在第一方向X上的尺寸较小，有利于提高电池模组120的能量密度。
在另一些实施例中，端板122的外表面可以设置沿第二方向Y间隔的两个凸起，两个凸起之间形成限位槽，使得限位槽的制备简单。
在一些实施例中，电池模组120包括两根绑带123，两根绑带123沿第二方向Y间隔设置。
通过设置两根绑带123，使得两根绑带123沿第二方向Y间隔设置，能够使得绑带123对多个电池单体121在第一方向X上的束缚力更大，能够更好地抑制电池单体121在第一方向X上的膨胀力，减小电池单体121及电池模组120解体的可能性，从而能够进一步延长电池模组120的使用寿命；并且绑带123对多个电池单体121的束缚力在第二方向Y上分布，使得电池单体121的受力更加均匀，减小电池单体121的单个部位受力过大而造成损伤的可能性。
请参照图7，图7为本申请另一些实施例提供的电池模组的部分结构的立体示意图。
在另一些实施例中，电池模组120可以包括一根绑带123，绑带123设置于端板122远离拉紧件124的一侧。
通过使得绑带123设置于端板122远离拉紧件124的一侧，使得绑带123和拉紧件124能够在第二方向Y上的两侧分别实现对多个电池单体121的固定作用，使得电池单体121的受力更加均匀，减小电池单体121的单个部位受力过大而造成损伤的可能性。
在另一些实施例中，电池模组120也可以包括多于两根的绑带123，例如三根、四根等，多根绑带123沿第二方向Y间隔设置。能够进一步使得绑带123对多个电池单体121在第一方向X上的束缚力更大，进一步更好地抑制电池单体121在第一方向X上的膨胀力，减小电池单体121及电池模组120解体的可能性，从而能够进一步延长电池模组120的使用寿命；并且绑带123对多个电池单体121的束缚力在第二方向Y上分布，使得电池单体121的受力更加均匀，减小电池单体121的单个部位受力过大而造成损伤的可能性。
在一些实施例中，沿第二方向Y，两根绑带123的间隔距离为D，电池单体121的长度为L，满足1/2≤D/L≤3/5。例如D/L可以为1/2、11/20或3/5等。
当D/L大于或等于1/2，能够使得绑带123对多个电池单体121的束缚效果更好，对电池单体121在第一方向X上的膨胀的抑制力更强，减小电池单体121及电池模组120解体的可能性，能够延长电池模组120的使用寿命；当D/L小于或等于3/5，能够减小绑带123与拉紧件124干涉的可能性，并且能够减小绑带123脱离端板122和电池单体121的可能性；因此，当1/2≤D/L≤3/5，既能够使得绑带123对多个电池单体121的束缚效果更好，对电池单体121在第一方向X上的膨胀的抑制力更强，减小电池单体121及电池模组120解体的可能性，能够延长电池模组120的使用寿命，又能够减小绑带123与拉紧件124干涉的可能性，并且能够减小绑带123脱离端板122和电池单体121的可能性。
在一些实施例中，第一方向X垂直于电池单体121面积最大的表面。
电池单体121在充放电过程中，金属离子在电极活性材料中的嵌入和脱出将引起电池单体121的膨胀收缩。在理想状态下，金属离子的嵌入和脱出过程中材料的体积变化应该是可逆的。但是在实际情况中，存在一部分金属离子由于电池单体121平衡的变化而无法完全从阳极脱嵌，或在循环过程中作为不溶性副产物沉积在阳极表面。这将引起电池单体121发生不可逆膨胀。电池单体121内的电解液含有杂质或电解液电化学窗口低都可能造成电解液分解，而产生气体，造成电池单体121膨胀。电池单体121的制造工艺也可能造成电池单体121的膨胀，例如封装不良使得水分进入电池单体121等原因也会造成电池单体121膨胀。
因此电池单体121在使用一段时间后，电池单体121会产生膨胀，并且电池单体121的膨胀主要会体现在电池单体121面积最大的表面。第一方向X垂直于电池单体121面积最大的表面，使得拉紧件124和绑带123能够限制多个电池单体121面积最大的表面上的膨胀，也能够加强电池模组120在第一方向X上的刚度，因此能够进一步限制多个电池单体121面积最大的表面上的膨胀，拉紧件124和绑带123对电池单体121的膨胀的限制效果更好，能够进一步改善电池单体121的内部循环性能，延长电池单体121的使用寿命，提高电池模组120整体结构的稳定性。
在另一些实施例中，第一方向X也可以垂直于电池单体121面积较小的表面，也能够起到限制电池单体121膨胀的作用，从而改善电池单体121的内部循环性能，延长电池单体121的使用寿命，提高电池模组120整体结构的稳定性。
参见图2，本申请一些实施例提供了一种电池100，包括以上任一方案所述的电池模组120。
在一些实施例中，电池100还包括箱体110，箱体110设置有容置空间，电池模组120的至少部分容置于容置空间。
通过设置箱体110，并使得电池模组120的至少部分容置于箱体110的容置空间，使得箱体110能够起到对电池单体121的保护作用，减小电池单体121直接受力而造成受损的可能性。
在一些实施例中，端板122设置有第二通孔1223，第二通孔1223沿第二方向Y贯穿端板122。
通过使得第二通孔1223沿第二方向Y贯穿端板，能够减小端板122的重量，从而减小电池模组120的整体重量。
在一些实施例中，电池100还包括第二固定件(图中未示出)，第二固定件沿第一方向X贯穿第二通孔1223并与箱体110连接。第一方向X与第二方向Y垂直。
通过使得第二固定件沿第一方向贯穿第二通孔1223并与箱体110连接，能够便于端板122与箱体110的连接，使得电池单体121不易在箱体110内晃动，能够减小电池单体121与箱体110碰撞而造成电池单体121受损的可能性。
在另一些实施例中，端板122与箱体110还可以为粘接连接。
在一些实施例中，电池单体121背向拉紧件124的一侧与箱体110粘接连接。
通过使得电池单体121背向拉紧件124的一侧与箱体110粘接连接，能够使得电池单体121与箱体110的连接更加稳固，电池单体121不易在箱体110内晃动，能够减小电池单体121与箱体110碰撞而造成电池单体121受损的可能性。
本申请一些实施例提供了一种用电装置，包括以上任一方案所述的电池100，电池100用于提供电能。
其中，用电装置可以是前述任意一种使用电池100的系统或设备。
请参照图3至图6，本申请一些实施例提供一种电池模组120，电池模组120包括多个电池单体121、两个端板122、绑带123、拉紧件124以及嵌件126。多个电池单体121沿第一方向X 排列。两个端板122分别设置于多个电池单体121沿第一方向X的两端。绑带123围绕电池单体121和端板122设置。端板122沿第二方向Y靠近主体部1241的一端设置有容置槽1222，嵌件126设置于容置槽1222，拉紧件124的两端分别与两个端板122、嵌件126连接。
在一些实施例中，电池单体121包括壳体1211和端盖1212，壳体1211沿第二方向Y的一端具有开口，端盖1212盖设于开口。拉紧件124包括主体部1241和两个连接部1242，两个连接部1242分别连接于主体部1241的两端，两个连接部1242分别与两个端板122连接，连接部1242与端板122背离电池单体121的一侧贴合。沿第二方向Y，主体部1241设置于端盖1212背向壳体1211的一侧。
在一些实施例中，端盖1212上设置有泄压机构1213，主体部1241设置有第一通孔1241a，第一通孔1241a为沿第一方向X延伸的长条孔，多个电池单体121的泄压机构1213均由第一通孔1241a露出。
在一些实施例中，端盖1212上设置有两个电极端子1214，两个电极端子1214沿第三方向Z间隔设置，沿第三方向Z，泄压机构1213设置于两个电极端子1214之间。拉紧件124设置于两个电极端子1214之间，且沿第二方向Y，拉紧件124于电极端子1214不重叠。
在一些实施例中，绑带123具有第一段1231、第二段1232、第三段1233以及第四段1234，第一段、第二段1232、第三段1233以及第四段1234依次连接，第一段1231与其中一个端板122背离电池单体121的一侧贴合，第三段1233与另一个端板122背离电池单体121的一侧贴合，沿第三方向Z，第二段1232与两个端板122、多个电池单体121重叠，第四段1234与两个端板122、多个电池单体121重叠。
在一些实施例中，连接部1242具有第一固定孔1242a，端板122具有第二固定孔1221，嵌件126设置有第三固定孔1261，电池模组120还包括第一固定件125，第一固定孔1242a为螺纹孔，第二固定孔1221为螺纹孔，第三固定孔1261为螺纹孔，第一固定件125为螺钉，第一固定件125贯穿第一固定孔1242a并与第一固定孔1242a螺纹连接，第一固定件125贯穿第二固定孔1221并与第二固定孔1221螺纹连接，第一固定件125与第三固定孔1261螺纹连接。
在一些实施例中，端板122设置有限位槽，绑带123的部分容置于限位槽。
在一些实施例中，电池模组120包括两根绑带123，两根绑带123沿第二方向Y间隔设置。沿第二方向Y，两根绑带123的间隔距离为D，电池单体121的长度为L，满足1/2≤D/L≤3/5。
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结合。
以上仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (17)

  1. 一种电池模组，其中，包括：
    多个电池单体，多个所述电池单体沿第一方向排列；
    两个端板，两个所述端板分别设置于多个所述电池单体沿所述第一方向的两端；
    绑带，围绕所述电池单体和所述端板设置；
    拉紧件，所述拉紧件的两端分别与两个所述端板连接。
  2. 根据权利要求1所述的电池模组，其中，所述电池单体包括壳体和端盖，所述壳体沿第二方向的一端具有开口，所述端盖盖设于所述开口；
    所述拉紧件包括主体部和两个连接部，两个所述连接部分别连接于所述主体部的两端，两个所述连接部分别与两个所述端板连接，沿所述第二方向，所述主体部设置于所述端盖背向所述壳体的一侧；
    所述第一方向与所述第二方向垂直。
  3. 根据权利要求2所述的电池模组，其中，所述端盖上设置有泄压机构，所述主体部设置有第一通孔，所述泄压机构由所述第一通孔露出。
  4. 根据权利要求3所述的电池模组，其中，所述第一通孔为沿所述第一方向延伸的长条孔，多个所述电池单体的所述泄压机构均由所述第一通孔露出。
  5. 根据权利要求2-4任一项所述的电池模组，其中，所述连接部与所述端板背离所述电池单体的一侧贴合。
  6. 根据权利要求2-5任一项所述的电池模组，其中，所述绑带具有第一段，所述第一段与所述端板背离所述电池单体的一侧贴合，沿所述第一方向，所述第一段与所述连接部不重叠。
  7. 根据权利要求2-6任一项所述的电池模组，其中，所述连接部具有第一固定孔，所述端板具有第二固定孔，所述电池模组还包括第一固定件，所述第一固定件贯穿所述第一固定孔，并与所述第二固定孔连接。
  8. 根据权利要求7所述的电池模组，其中，所述端板设置有容置槽，所述电池模组还包括嵌件，所述嵌件设置于所述容置槽，所述嵌件设置有第三固定孔，所述第一固定件贯穿所述第一固定孔和所述第二固定孔，并与所述第三固定孔连接。
  9. 根据权利要求8所述的电池模组，其中，所述容置槽设置在所述端板沿所述第二方向靠近所述主体部的一端。
  10. 根据权利要求2-9任一项所述的电池模组，其中，所述端板设置有限位槽，所述绑带的部分容置于所述限位槽。
  11. 根据权利要求2-10任一项所述的电池模组，其中，所述电池模组包括两根所述绑带，两根所述绑带沿所述第二方向间隔设置。
  12. 根据权利要求11所述的电池模组，其中，沿所述第二方向，两根所述绑带的间隔距离为D，所述电池单体的长度为L，满足1/2≤D/L≤3/5。
  13. 一种电池，其中，包括如权利要求1-12任一项所述的电池模组。
  14. 根据权利要求13所述的电池，其中，所述电池还包括箱体，所述箱体设置有容置空间，所述电池模组的至少部分容置于所述容置空间。
  15. 根据权利要求14所述的电池，其中，所述端板设置有第二通孔，所述第二通孔沿第二方向贯穿所述端板，所述电池还包括第二固定件，所述第二固定件沿所述第一方向贯穿所述第二通孔并与所述箱体连接；
    所述第一方向与所述第二方向垂直。
  16. 根据权利要求14或15所述的电池，其中，所述电池单体背向所述拉紧件的一侧与所述箱体粘接连接。
  17. 一种用电装置，其中，包括如权利要求13至16任一项所述的电池，所述电池用于提供电能。
PCT/CN2024/132099 2024-05-09 2024-11-14 电池模组、电池以及用电装置 Pending WO2025232133A1 (zh)

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