WO2024007447A1 - 端盖组件、电池单体、电池以及用电装置 - Google Patents

端盖组件、电池单体、电池以及用电装置 Download PDF

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Publication number
WO2024007447A1
WO2024007447A1 PCT/CN2022/118121 CN2022118121W WO2024007447A1 WO 2024007447 A1 WO2024007447 A1 WO 2024007447A1 CN 2022118121 W CN2022118121 W CN 2022118121W WO 2024007447 A1 WO2024007447 A1 WO 2024007447A1
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WIPO (PCT)
Prior art keywords
end cap
groove
battery cell
insulating member
end cover
Prior art date
Application number
PCT/CN2022/118121
Other languages
English (en)
French (fr)
Inventor
石胜云
郭志君
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to CN202280067427.6A priority Critical patent/CN118056332A/zh
Publication of WO2024007447A1 publication Critical patent/WO2024007447A1/zh

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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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/673—Containers for storing liquids; Delivery conduits therefor
    • 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
    • H01M50/70—Arrangements for stirring or circulating the electrolyte
    • 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 batteries, and in particular to an end cover assembly, a battery cell, a battery and an electrical device.
  • Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection.
  • battery technology is an important factor related to their development.
  • the present application provides an end cover assembly, a battery cell, a battery and an electrical device.
  • the end cover assembly When the end cover assembly is used in a battery cell, it can improve the utilization rate of the internal space of the battery cell and the electrolyte.
  • the present application provides an end cover assembly for a battery cell.
  • the end cover assembly includes: an end cover; an insulator, which is disposed on the side of the end cover facing the inside of the battery cell, along the length direction of the end cover. , two ends of the insulating member are provided with grooves opposite each other. Along the thickness direction of the end cover, the groove is recessed from the surface of the insulating member toward the end cover in a direction away from the end cover; wherein, the wall of the groove includes a communication groove, which communicates The groove is used to communicate the groove with the inner cavity of the casing of the battery cell.
  • the end cover assembly includes an end cover and an insulating member.
  • the insulating member is disposed on the side of the end cover facing the inside of the battery cell.
  • the insulating member is provided with two opposite ends along the length direction of the end cover.
  • the groove can accommodate the electrolyte, increase the electrolyte capacity of the battery cell used in the end cover assembly, and improve the space utilization inside the battery cell.
  • the setting of the connecting groove allows the groove to communicate with the inner cavity of the battery cell casing, so that the electrolyte can circulate inside the groove and the casing, preventing part of the electrolyte from being enclosed in the groove, and improving electrolysis Liquid utilization.
  • the number of communication grooves is more than two, and the two or more communication grooves are spaced apart from each other.
  • the end cap assembly provided in the embodiment of the present application facilitates multi-channel communication between the grooves and the inside of the housing by setting the number of communication grooves to more than two, ensuring that the electrolyte flows inside the housing and in the grooves.
  • the wall portion includes a bottom wall and a side wall, and the communication groove is provided on the side wall.
  • the end cover assembly provided by the embodiment of the present application can ensure the communication requirements between the groove and the inside of the housing by providing a communication groove on the side wall.
  • the side of the insulating member facing the electrode assembly is used to resist the electrode assembly.
  • At least part of the communication groove is disposed through the side wall of the groove along the length direction of the end cap.
  • the end cap assembly provided by the embodiment of the present application is provided by defining at least part of a number of communication grooves that penetrate the side walls of the groove along the length direction. This allows the groove to communicate with the interior of the casing on one side of the length direction, ensuring the circulation requirements of the electrolyte and improving the utilization rate of the electrolyte.
  • At least part of the communication groove is disposed through the side wall of the groove along the width direction of the end cap.
  • the end cap assembly provided by the embodiment of the present application is provided by defining at least part of a number of communication grooves that penetrate the side walls of the groove along the width direction of the end cap. This allows the groove to communicate with the interior of the casing on at least one side in the width direction, which can also ensure the circulation requirements of the electrolyte and improve the utilization rate of the electrolyte.
  • the groove further includes a connecting portion for connecting with the insulating film of the battery cell.
  • the groove include a connecting part, it can be connected to the insulating film through the connecting part, thereby increasing the connection area between the insulating film and the insulating member, thereby ensuring the connection strength between the two.
  • the insulating member further includes reinforcing ribs, which are disposed in the groove and connected to the wall of the groove.
  • the end cap assembly provided by the embodiment of the present application can increase the strength of the position where the insulating member is provided with the groove by making the insulating member further include a reinforcing rib, and the reinforcing rib is disposed in the groove and connected to the wall of the groove, ensuring that the insulating member is performance requirements.
  • the reinforcing ribs separate the grooves to form two or more groove units, and each groove unit can communicate with the inner cavity of the housing through at least one communication groove.
  • Embodiments of the present application provide an end cover assembly that separates grooves with reinforcing ribs to form two or more groove units, and at the same time enables each groove unit to communicate with the inner cavity of the shell through at least one communication groove, which can ensure that the insulation member is in place
  • the need to strengthen the groove position can also prevent the electrolyte from being enclosed in each tank unit to ensure the utilization of the electrolyte.
  • the number of reinforcing ribs is more than two, and at least part of the two or more reinforcing ribs are spaced apart along the width direction of the end cap; wherein, along the length direction of the end cap, the length of each reinforcing rib is shorter than the groove. slot width.
  • the end cover assembly provided by the embodiment of the present application, through the above arrangement, can strengthen the position where the groove of the insulating member is set by more than two reinforcing ribs to ensure the strength requirements, and at the same time, it can effectively avoid the sealing of the electrolyte and improve the electrolyte. utilization rate.
  • the reinforcing ribs are in the shape of a rectangular plate or a triangular plate.
  • the reinforcing rib adopts the above form, which can not only meet the reinforcement requirements, but also facilitate the processing and manufacturing of insulating parts.
  • the insulating member includes an insulating body and a limiting protrusion.
  • the insulating body and the end cover are stacked and connected.
  • the limiting protrusion protrudes from the insulating body toward a side away from the end cap.
  • the groove is disposed through the insulating body and partially extends into the limiting protrusion.
  • the end cover assembly provided by the embodiment of the present application can not only improve the strength of the insulating member by setting the limiting protrusions, but also the limiting protrusions can be used to press against the main body of the electrode assembly. , the main part of the electrode assembly is limited, and the space between the limiting protrusion and the insulating body can be used to accommodate structures such as adapter sheets, which is beneficial to the grouping of battery cells.
  • the grooves on both sides of the insulating member in the length direction of the end cap are symmetrically distributed with each other.
  • one of the insulating member and the end cap is provided with a snap-in protrusion and the other is provided with a snap-in groove, and the snap-in protrusion matches the shape of the snap-in slot and is connected in snap.
  • the end cover assembly provided by the embodiment of the present application is provided with a snap-on protrusion on one of the insulating member and the end cover and a snap-on groove on the other, which facilitates snap-fitting of the two and ensures the positioning and connection requirements of the two. .
  • the end cap is provided with a pressure relief structure
  • the insulating member is provided with an exhaust hole penetrating along the thickness direction.
  • the orthographic projection of the pressure relief structure covers at least part of the exhaust hole.
  • the end cover assembly provided by the embodiment of the present application is provided with a pressure relief structure on the end cover, and the insulating member is provided with an exhaust hole penetrating along the thickness direction.
  • the orthographic projection of the pressure relief structure covers at least part of the exhaust gas. The holes are conducive to the elimination of gas generated inside the battery cell, ensuring the safety performance of the battery cell.
  • the application provides a battery cell, including: a casing with an opening; an electrode assembly disposed in the casing; an electrolyte filled in the casing; and the above-mentioned end cover assembly, which is arranged to close the opening.
  • the communication groove is used to communicate the groove with the inner cavity of the shell.
  • the present application provides a battery, including a box and the above-mentioned battery cells, and the battery cells are accommodated in the box.
  • the present application provides an electrical device, including the above-mentioned battery cell, and the battery cell is used to provide electric energy.
  • Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application.
  • Figure 2 is a schematic structural diagram of a battery provided by an embodiment of the present application.
  • Figure 3 is a schematic diagram of the exploded structure of a battery cell provided by an embodiment of the present application.
  • Figure 4 is a schematic exploded view of the end cap assembly provided by an embodiment of the present application.
  • Figure 5 is a schematic structural diagram of an insulating member provided by an embodiment of the present application.
  • Figure 6 is a schematic structural diagram of an insulating member provided by another embodiment of the present application.
  • Figure 7 is a schematic structural diagram of an insulating member provided by yet another embodiment of the present application.
  • Figure 8 is a schematic structural diagram of an insulating member provided by yet another embodiment of the present application.
  • 233-insulation piece 2331-groove; 2331a-groove unit; 2332-communication groove; 2333-wall; 23331-bottom wall; 23332-side wall; 2334-reinforcement rib; 2335-latching protrusion; 2336-row Air hole; 2337-connection part; 233a-insulating body; 233b-limiting protrusion;
  • a first feature “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in direct contact. Indirect contact through intermediaries.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. . As the application fields of power batteries continue to expand, their market demand is also constantly expanding.
  • the battery cell usually includes a casing, an electrode assembly, an electrolyte and an end cap assembly.
  • the end cap assembly is closed on the casing to provide a sealed space for the electrode assembly and the electrolyte.
  • the electrode assembly is electrically connected to the electrode terminal of the end cap assembly. , the electric energy of the electrode assembly can be led out of the housing through the electrode terminals of the end cover assembly.
  • the insulating plate of the end cover assembly is provided with a groove on the side facing the end cover, which can not only reduce the weight of the end cover assembly, but also increase the internal density of the battery cell. Accommodating space improves the space utilization of battery cells, relieves the tight remaining space for liquid injection inside the battery, and improves electrolyte utilization. However, after testing, it was found that the electrolyte utilization rate could not be improved by arranging grooves on the battery end cover assembly in the prior art. The inventor further studied and found that a gap was formed between the groove on the insulator and the end cover.
  • the groove can be connected to the inside of the casing so that the electrolyte can circulate in the groove and inside the groove to ensure that all the electrolyte can fully communicate with the electrode assembly. Contact reaction to improve electrolyte utilization.
  • the end cover assembly is used for battery cells.
  • the end cover assembly includes an end cover and an insulating piece.
  • the insulating piece is provided On the side of the end cover facing the inside of the battery cell, along the length direction of the end cover, two opposite ends of the insulating member are provided with grooves. Along the thickness direction of the end cover, the grooves are directed from the surface of the insulating member toward the end cover to the away end.
  • the direction of the cover is recessed; wherein, the wall portion of the groove includes a communication groove, and the communication groove is used to communicate the groove with the inner cavity of the casing of the battery cell.
  • grooves are provided at opposite ends of the insulating member along the length direction of the end cover.
  • the grooves can be used to accommodate the electrolyte and increase the capacity of the electrolyte of the battery cell used in the end cover assembly. , improve the space utilization inside the battery cell.
  • the setting of the connecting groove allows the groove to communicate with the inner cavity of the battery cell casing, so that the electrolyte can circulate inside the groove and the casing, preventing part of the electrolyte from being enclosed in the groove, and improving electrolysis Liquid utilization.
  • Electrical devices can be vehicles, cell phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, etc.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.
  • spacecraft include aircraft, rockets, space shuttles, spaceships, etc.
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • Electric drills Electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • a battery 100 is disposed inside a vehicle 1000 .
  • the battery 100 may be disposed at the bottom, head, or tail 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 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • the battery 100 includes a case 10 and a battery cell 20 .
  • the battery cell 20 is contained in the case 10 .
  • the box 10 is used to provide a sealed space for the battery cells 20.
  • the box 10 can be in various shapes, such as cylinder, rectangular parallelepiped, etc. In Fig. 2, as an example, the box 10 is a rectangular parallelepiped.
  • the box 10 may include a first part 11 and a second part 12 , the first part 11 and the second part 12 covering each other to define a seal for containing the battery cells 20 Space 13.
  • the first part 11 may be a hollow structure with one side open
  • the second part 12 may also be a hollow structure with one side open.
  • the open side of the second part 12 is covered with the open side of the first part 11 to form a sealed space 13.
  • the second part 12 is located on the upper side of the first part 11.
  • the second part 12 can also be called the upper box, and the first part 11 can also be called the lower box.
  • 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 is accommodated in the box 10 .
  • multiple battery cells 20 may be first connected in series, parallel, or mixed to form a battery module, and then multiple battery modules may be connected in series, parallel, or mixed to form a whole, and be accommodated in the box 10 .
  • the battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes.
  • the plurality of battery cells 20 are first connected in series, parallel, or mixed to form a battery module.
  • the plurality of battery modules are then connected in series, parallel, or mixed to form a whole, and are accommodated in a box.
  • the battery 100 may further include a bus component, through which the multiple battery cells 20 may be electrically connected to achieve series, parallel, or mixed connection of the multiple battery cells 20 .
  • a bus component through which the multiple battery cells 20 may be electrically connected to achieve series, parallel, or mixed connection of the multiple battery cells 20 .
  • the positive electrode terminal of one battery cell 20 is connected to the negative electrode terminal of the other battery cell 20 through a bus component to realize the series connection of the two battery cells 20 .
  • the battery cell 20 may include a casing 21 , an electrode assembly 22 , an end cap assembly 23 and an insulating film 24 .
  • the casing 21 has an opening 211
  • the electrode assembly 22 is accommodated in the casing 21
  • the end cap assembly 23 includes a cover plate 231 and electrode terminals 232 , the cover plate 231 is used to cover the opening 211 , and the electrode terminals 232 are used to electrically connect with the electrode assembly 22 .
  • the outer casing 21 can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., which are not particularly limited in the embodiment of the present application.
  • the housing 21 can be in various shapes, such as cylinder, cuboid, etc.
  • the shape of the housing 21 can be determined according to the specific shape of the electrode assembly 22 . For example, if the electrode assembly 22 has a cylindrical structure, the housing 21 can have a cylindrical structure; if the electrode assembly 22 has a rectangular parallelepiped structure, the housing 21 can have a rectangular parallelepiped structure.
  • both the housing 21 and the electrode assembly 22 have a rectangular parallelepiped structure.
  • the electrode assembly 22 may include a positive electrode sheet, a negative electrode sheet, and a separator.
  • the electrode assembly 22 may be a roll-type structure formed by rolling a positive electrode sheet, a separator film, and a negative electrode sheet.
  • the electrode assembly 22 may also be a stacked structure formed by a stacked arrangement of positive electrode sheets, isolation films, and negative electrode sheets.
  • the electrode assembly 22 may also include a positive electrode tab (not shown) and a negative electrode tab (not shown), which may be a positive electrode current collector that is not coated with a positive electrode active material layer in the positive electrode sheet as the positive electrode.
  • the tabs may be the negative electrode current collector in the negative electrode sheet that is not coated with the negative active material layer as the negative electrode tabs.
  • the cover plate 231 of the end cap assembly 23 is used to cover the opening 211 of the housing 21 to form a sealed space for accommodating the battery cells 20 (not shown). Confined spaces are also used to contain electrolytes, such as electrolytes.
  • the electrode terminal 232 of the end cover assembly 23 serves as a component for outputting electric energy of the electrode assembly 22.
  • the electrode terminal 232 is used for electrical connection with the electrode assembly 22, that is, the electrode terminal 232 is electrically connected to the tab of the electrode assembly 22.
  • the electrode terminal 232 is electrically connected to the tab of the electrode assembly 22.
  • the tabs are connected through an adapter piece to realize the electrical connection between the electrode terminal 232 and the tabs.
  • the opening 211 of the housing 21 may be one or two.
  • the housing 21 has one opening 211
  • the end cover assembly 23 can also have one.
  • the end cover assembly 23 can be provided with two electrode terminals 232 , and the two electrode terminals 232 are respectively positive electrodes.
  • the electrode terminal and the negative electrode terminal, the positive electrode terminal and the negative electrode terminal are respectively used to electrically connect the positive electrode tab and the negative electrode tab of the electrode assembly 22 .
  • the battery cell 20 having such a structure may be a prismatic battery cell 20 .
  • the number of openings 211 of the housing 21 is two.
  • the two openings 211 are provided on opposite sides of the housing 21 .
  • the electrode terminal 232 in one end cap assembly 23 may be a positive electrode terminal for electrical connection with the positive tab of the electrode assembly 22; the electrode terminal 232 in the other end cap assembly 23 may be a negative electrode.
  • the terminal is used for electrical connection with the negative electrode piece 222 of the electrode assembly 22 .
  • the battery cell 20 having such a structure may be a cylindrical battery cell 20 .
  • the insulating film 24 is provided surrounding the electrode assembly 22.
  • the shape of the insulating film 24 can match the shape of the housing 21 and is located in the inner cavity of the housing 21.
  • the insulating film 24 is used to insulate the electrode assembly 22 from the housing 21.
  • the end cover assembly 23 As shown in Figures 4 and 5, the end cover assembly 23 provided by this application is used for the battery cell 20.
  • the end cover assembly 23 includes an end cover 231 and an insulating member 233.
  • the insulating member 233 is disposed on the end cover 231 facing the battery cell.
  • On one side of the inside of 20, along the length direction The wall portion 2333 of the groove 2331 includes a communication groove 2332 that is used to communicate the groove 2331 with the inner cavity of the housing 21 of the battery cell 20 .
  • the end cap 231 is a component that covers the opening of the housing 21 to isolate the internal environment of the battery cell 20 from the external environment.
  • the end cap 231 and the housing 21 jointly define a sealed space for accommodating the electrode assembly 22, electrolyte and other components.
  • the shape of the end cover 231 can be adapted to the shape of the casing 21.
  • the casing 21 has a rectangular parallelepiped structure, and the end cover 231 has a rectangular plate structure matching the casing 21.
  • the casing 21 is a cylindrical structure, and the end cap 231 is a circular plate structure that is adapted to the housing 21 .
  • the end cap 231 can also be made of a variety of materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 231 and the housing 21 can be the same or different.
  • the end cap 231 may be in the form of a plate-shaped structure with a predetermined length, width and thickness.
  • the end cap 231 may be provided with electrode terminals 232 , and the electrode terminals 232 are used to electrically connect with the electrode assembly 22 to output the electrical energy of the battery cell 20 .
  • the electrode terminal 232 may include a positive electrode terminal for electrical connection with the positive electrode tab and a negative electrode terminal for electrical connection with the negative electrode tab.
  • the positive electrode terminal and the positive electrode tab can be connected directly or indirectly, and the negative electrode terminal and the negative electrode tab can be connected directly or indirectly.
  • the insulating member 233 is used to insulate the end cap 231 from the electrode assembly 22 .
  • the shape of the insulator 233 may match the shape of the end cap 231 .
  • the shapes of the grooves 2331 provided at both ends of the insulating member 233 in the length direction ellipse or polygon.
  • the depth of the groove 2331 is smaller than the thickness of the insulating member 233 .
  • the groove 2331 forms an opening toward one side of the end cap 231 in the thickness direction Z.
  • the groove 2331 may include a bottom wall 23331 and a side wall 23332.
  • the communication groove 2332 may be provided on the bottom wall 23331. Of course, it may also be provided on the side wall 23332, or it may be provided on both the bottom wall 23331 and the side wall 23332.
  • a communication slot 2332 is provided.
  • the number of communication grooves 2332 provided in the wall portion 2333 of the groove 2331 can be one, or of course, it can be more than two. When there are more than two, the two or more communication grooves 2332 are spaced apart from each other.
  • the end cap assembly 23 provided in the embodiment of the present application has grooves 2331 provided at opposite ends of the insulating member 233 along the length direction
  • the electrolyte capacity of the battery cell 20 is increased, thereby improving the space utilization inside the battery cell 20 .
  • the communication groove 2332 is provided so that the groove 2331 can communicate with the inner cavity of the casing 21 of the battery cell 20, so that the electrolyte can circulate inside the groove 2331 and the casing 21, preventing part of the electrolyte from being enclosed in the casing 21.
  • the utilization rate of the electrolyte is improved.
  • the number of communication grooves 2332 is more than two, and the two or more communication grooves 2332 are spaced apart from each other.
  • the number of communication grooves 2332 provided on the side wall 23332 of each groove 2331 may be more than two, or the number of communication grooves 2332 provided on the bottom wall 23331 of each groove 2331 may be two. More than one.
  • the end cover assembly 23 provided in the embodiment of the present application facilitates multi-channel communication between the groove 2331 and the inside of the housing 21 by setting the number of communication grooves 2332 to more than two, ensuring that the electrolyte is in the interior of the housing 21 and the groove. Flow within 2331.
  • the wall portion 2333 includes a bottom wall 23331 and a side wall 23332, and the communication groove 2332 is provided on the side wall 23332.
  • the portion of the wall portion 2333 facing the end cover 231 in the thickness direction Z is the bottom wall 23331
  • the portion of the wall portion 2333 surrounding the bottom wall 23331 is the side wall 23332
  • the communication groove 2332 is provided in the side wall 23332.
  • the communication groove 2332 may be recessed in the thickness direction Z starting from the side wall 23332 toward one end of the end cap 231 .
  • the communication groove 2332 may penetrate the side wall 23332 in the length direction X of the end cover 231, or may penetrate the side wall 23332 in the width direction Y of the end cover 231.
  • the end cover assembly 23 provided in the embodiment of the present application can ensure the communication requirements between the groove 2331 and the inside of the housing 21 by providing a communication groove 2332 on the side wall 23332.
  • the insulating member 233 is provided on the side facing the electrode assembly 22.
  • At least part of the communication grooves 2332 is disposed through the side wall 23332 of the groove 2331 along the length direction X of the end cap 231 .
  • the side wall 23332 of the groove 2331 includes a first wall, a second wall and a third wall.
  • the first wall and the second wall are oppositely arranged in the width direction Y of the end cap 231 , and the third wall extends along the end cap 231
  • the width direction Y extends and is connected between the first wall and the second wall.
  • At least a part of the communication grooves 2332 may penetrate the third wall of the side wall 23332 along the length direction X of the end cover 231 .
  • the end cap assembly 23 provided by the embodiment of the present application is provided by defining at least part of a number of communication grooves 2332 that penetrate the side walls 23332 of the groove 2331 along the length direction X of the end cap 231 . This allows the groove 2331 to communicate with the inside of the housing 21 on one side of the end cover 231 in the length direction X, ensuring the circulation requirements of the electrolyte and improving the utilization rate of the electrolyte.
  • At least part of the communication grooves 2332 is provided through the side wall 23332 of the groove 2331 along the width direction Y of the end cap 231 .
  • At least a part of the communication grooves 2332 may penetrate one of the first wall and the second wall along the width direction Y of the end cover 231.
  • a part of the communication grooves 2332 may penetrate the first wall, and part of the communication grooves 2332 may penetrate the first wall.
  • a number of communication grooves 2332 penetrate the second wall.
  • the end cap assembly 23 provided by the embodiment of the present application is provided by defining at least part of a number of communication grooves 2332 that penetrate the side walls 23332 of the groove 2331 along the width direction Y of the end cap 231. This allows the groove 2331 to communicate with the inside of the housing 21 on at least one side of the width direction Y, which can also ensure the circulation requirements of the electrolyte and improve the utilization rate of the electrolyte.
  • the end cover assembly 23 provided by the embodiment of the present application can only allow the communication groove 2332 to be disposed through the side wall 23332 of the groove 2331 along the length direction
  • the width direction Y of the cover 231 is disposed through the side wall 23332 of the groove 2331.
  • a partial number of communication grooves 2332 can also be disposed through the side wall 23332 of the groove 2331 along the length direction
  • the communication groove 2332 is provided through the side wall 23332 of the groove 2331 along the width direction Y of the end cap 231 .
  • the groove 2331 further includes a connecting portion 2337 for connecting with the insulating film 24 of the battery cell 20 .
  • the remaining portion on the side wall 23332 can be understood as the connecting portion 2337.
  • the portion between two adjacent communication grooves 2332 on the side wall 23332 can be understood as the connecting portion 2337.
  • the end cap assembly 23 provided in the embodiment of the present application can be connected to the insulating film 24 through the connecting portion 2337 by making the groove 2331 include the connecting portion 2337, thereby increasing the connection area between the insulating film 24 and the insulating member 233, thereby ensuring that both the strength of the connection between them.
  • the insulating member 233 further includes reinforcing ribs 2334.
  • the reinforcing ribs 2334 are provided in the groove 2331 and connected to the wall portion 2333 of the groove 2331.
  • the reinforcing rib 2334 can be connected to the bottom wall 23331 of the groove 2331, and the reinforcing rib 2334 can also be connected to the bottom wall 23331 and the side wall 23332 of the groove 2331 at the same time.
  • the reinforcing ribs 2334 may be plate-like structures.
  • the number of reinforcing ribs 2334 may be one, or of course, it may be more than two. When there are more than two reinforcing ribs 2334, the two or more reinforcing ribs 2334 may be spaced apart from each other.
  • the end cap assembly 23 provided by the embodiment of the present application can increase the number of insulating members 233 by making the insulating member 233 further include reinforcing ribs 2334, and having the reinforcing ribs 2334 disposed in the groove 2331 and connected to the wall 2333 of the groove 2331.
  • the strength of the groove 2331 position ensures the performance requirements of the insulating member 233.
  • the reinforcing ribs 2334 separate the groove 2331 to form more than two groove units 2331a, and each groove unit 2331a can communicate with the inner cavity of the housing 21 through at least one communication groove 2332.
  • the reinforcing ribs 2334 may be connected to both the side walls 23332 and the bottom wall 23331 of the groove 2331 to separate the groove 2331 to form a plurality of groove units 2331a.
  • the number of slot units 2331a may be two, three or more.
  • more than two groove units 2331a may be distributed along the width direction Y of the end cover 231.
  • each slot unit 2331a can communicate with the inner cavity of the housing 21 through one communication slot 2332.
  • each slot unit 2331a can also communicate with the inner cavity of the housing 21 through two or more communication slots 2332.
  • the embodiment of the present application provides an end cover assembly 23 that separates the groove 2331 with the reinforcing ribs 2334 to form two or more groove units 2331a, and at the same time enables each groove unit 2331a to communicate with the inner cavity of the housing 21 through at least one communication groove 2332. , which can not only ensure the reinforcement requirement of the insulating member 233 at the position of the groove 2331, but also prevent the electrolyte from being enclosed in each tank unit 2331a, ensuring the utilization of the electrolyte.
  • the number of reinforcing ribs 2334 is more than two, and at least part of the two or more reinforcing ribs 2334 are spaced apart along the width direction Y of the end cap 231; wherein, along the length direction X of the end cap 231, each reinforcing rib The length of the rib 2334 is smaller than the groove width of the groove 2331.
  • more than two reinforcing ribs 2334 can be distributed at intervals along the width direction Y of the end cover 231 .
  • more than two reinforcing ribs can also be arranged. Parts of 2334 are spaced apart along the width direction Y, and parts are spaced apart along the length direction X of the end cap 231, as long as the strengthening requirements can be ensured.
  • each reinforcing rib 2334 is smaller than the groove width of the groove 2331, so that the spaces between two adjacent reinforcing ribs 2334 are connected.
  • the end cap assembly 23 provided in the embodiment of the present application, through the above arrangement, can strengthen the position where the groove 2331 is set up in the insulating member 233 through two or more reinforcing ribs 2334 to ensure the strength requirements and at the same time effectively avoid the sealing of the electrolyte. , improve the utilization rate of electrolyte.
  • the reinforcing ribs 2334 are in the shape of a rectangular plate or a triangular plate.
  • the reinforcing ribs 2334 can be in the shape of a rectangular plate.
  • the reinforcing ribs 2334 can also be in the shape of a triangular plate.
  • the number of the reinforcing ribs 2334 is more than two, more than two reinforcing ribs 2334 can be All are in the shape of rectangular plates, and of course they can all be in the shape of triangular plates.
  • some of the reinforcing ribs 2334 can also be formed into a rectangular plate-like structure, and some of the reinforcing ribs 2334 can be formed into a triangular plate-like structure.
  • the reinforcing ribs 2334 adopt the above-mentioned form, which can not only meet the reinforcement requirements, but also facilitate the processing and manufacturing of the insulating member 233 .
  • the insulating member 233 includes an insulating body 233a and a limiting protrusion 233b.
  • the insulating body 233a is stacked and connected to the end cover 231.
  • the limiting protrusion 233b faces away from the end cover 231.
  • the side protrudes from the insulating body 233a, and the groove 2331 penetrates the insulating body 233a and partially extends into the limiting protrusion 233b.
  • the orthogonal projected area of the insulating protrusion may be larger than the orthogonal projected area of the groove 2331.
  • the extension dimension of the limiting protrusion 233 b may be equal to the extension dimension of the end cap 231 .
  • the end cover assembly 23 provided in the embodiment of the present application can not only improve the strength of the insulating member 233 by setting the position of the groove 2331 by setting the limiting protrusion 233b, but at the same time, the limiting protrusion 233b can be used to resist the voltage.
  • the main body of the electrode assembly 22 is used to limit the main body of the electrode assembly 22, and the space between the limiting protrusion 233b and the insulating body 233a can be used to accommodate structures such as adapter sheets, which is beneficial to the grouping of the battery cells 20. .
  • the grooves 2331 on both sides of the insulating member 233 in the length direction X of the end cover 231 are symmetrically distributed with each other.
  • the grooves 2331 on both sides may be symmetrically distributed in the length direction X of the end cap 231 .
  • the end cap assembly 23 provided in the embodiment of the present application can ensure the balance of the force on the insulating member 233 by symmetrically distributing the grooves 2331 on both sides, and at the same time facilitates the processing and manufacturing of the insulating member 233.
  • one of the insulating member 233 and the end cover 231 is provided with a snap-in protrusion 2335 and the other is provided with a snap-in slot.
  • the snap-in protrusion 2335 matches the shape of the slot and is snap-connected. .
  • a locking protrusion 2335 can be provided on the insulating member 233 and a locking groove can be provided on the end cover 231 .
  • slots can also be provided on the insulating member 233 and snapping protrusions 2335 can be provided on the end cover 231 .
  • the end cover assembly 23 provided in the embodiment of the present application is provided with a snap-in protrusion 2335 on one of the insulating member 233 and the end cover 231 and a snap-in groove is provided on the other, which facilitates the snap-fit of the two and ensures that the two are snap-fitted. positioning connection requirements.
  • the end cap 231 is provided with a pressure relief structure 231a, and the insulating member 233 is provided with an exhaust hole 2336 penetrating along the thickness direction Z.
  • the orthographic projection of the pressure relief structure 231a covers at least part of the exhaust hole 2336.
  • the pressure relief structure 231a may be a pressure relief valve, or may be a weak area such as a score provided on the end cover 231.
  • the end cover assembly 23 provided in the embodiment of the present application is provided with a pressure relief structure 231a on the end cover 231, and the insulating member 233 is provided with an exhaust hole 2336 penetrating along the thickness direction Z.
  • the pressure relief structure 231a The orthographic projection covers at least part of the exhaust hole 2336, which facilitates the elimination of gas generated inside the battery cell 20 and ensures the safety performance of the battery cell 20.
  • the present application also provides a battery cell 20, including a case 21, an electrode assembly 22, an electrolyte, and the above-mentioned end cap assembly 23.
  • the housing 21 has an opening, and the electrode assembly 22 is disposed in the housing 21 .
  • the electrolyte is filled in the case 21 .
  • the end cap assembly 23 is configured to close the opening, and the communication groove 2332 is used to communicate the groove 2331 with the inner cavity of the housing 21 .
  • the present application also provides a battery, including the battery cell 20 described in any of the above solutions.
  • the present application also provides an electrical device, including the battery described in any of the above solutions, and the battery is used to provide electrical energy for the electrical device.
  • the powered device can be any of the aforementioned devices or systems that use batteries.

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  • Chemical & Material Sciences (AREA)
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  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本申请提供一种端盖组件、电池单体、电池以及用电装置，端盖组件用于电池单体，端盖组件包括：端盖；绝缘件，设置于端盖面向电池单体内部的一侧，沿端盖的长度方向，绝缘件的两端相对设置有凹槽，沿端盖的厚度方向，凹槽由绝缘件朝向端盖的表面向背离端盖的方向凹陷设置；其中，凹槽的壁部包括连通槽，连通槽用于将凹槽与电池单体的壳体的内腔连通。本申请能够提高电池单体的内部空间以及电解液的利用率。

Description

端盖组件、电池单体、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2022年07月06日提交的名称为“端盖组件、电池单体、电池以及用电装置”的中国专利申请202221717791.6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
本申请涉及电池领域，特别涉及一种端盖组件、电池单体、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。
在现有的电池技术中，其端盖组件中的绝缘件存在的封闭空间将会使得电解液难以溢出，降低了电解液的利用率。
发明内容
鉴于上述问题，本申请提供一种端盖组件、电池单体、电池以及用电装置，端盖组件在用于电池单体时，能够提高电池单体的内部空间以及电解液的利用率。
第一方面，本申请提供了一种端盖组件，用于电池单体，端盖组件包括：端盖；绝缘件，设置于端盖面向电池单体内部的一侧，沿端盖的长度方向，绝缘件的两端相对设置有凹槽，沿端盖的厚度方向，凹槽由绝缘件朝向端盖的表面向背离端盖的方向凹陷设置；其中，凹槽的壁部包括连通槽，连通槽用于将凹槽与电池单体的壳体的内腔连通。
本申请实施例的技术方案中，端盖组件包括端盖以及绝缘件，绝缘件设置在端盖面向电池单体内部的一侧，通过使得绝缘件沿端盖的长度方向的两端相对设置有凹槽，利用凹槽能够容纳电解液，增加端盖组件所应用的电池单体的电解液的容量，提高电池单体内部的空间利用率。同时，连通槽的设置，使得凹槽可以与电池单体的壳 体的内腔连通，使得电解液可以在凹槽以及壳体的内部流通，避免部分电解液被封闭在凹槽内，提高电解液的利用率。
在一些实施例中，连通槽的数量为两个以上，两个以上连通槽彼此间隔设置。
本申请实施例提供的端盖组件，通过使得连通槽的数量设置为两个以上，利于凹槽与壳体内部进行多通道连通，保证电解液在壳体的内部以及凹槽内流动。
在一些实施例中，壁部包括底壁以及侧壁，连通槽设置于侧壁。
本申请实施例提供的端盖组件，通过在侧壁上设置连通槽，既能够保证凹槽与壳体内部的连通需求，同时，绝缘件朝向电极组件的一侧用于抵压电极组件，通过将连通槽设置于凹槽的侧壁，能够增加底壁与电极组件的接触面积，保证端盖与电极组件的主体部分之间的绝缘设置要求。
在一些实施例中，至少部分数量连通槽沿端盖的长度方向贯穿凹槽的侧壁设置。
本申请实施例提供的端盖组件，通过限定至少部分数量连通槽沿长度方向贯穿凹槽的侧壁设置。使得凹槽可以在长度方向的一侧与壳体内部连通，保证电解液的流通需求，提高电解液的利用率。
在一些实施例中，至少部分数量连通槽沿端盖的宽度方向贯穿凹槽的侧壁设置。
本申请实施例提供的端盖组件，通过限定至少部分数量连通槽沿端盖的宽度方向贯穿凹槽的侧壁设置。使得凹槽可以在宽度方向的至少一侧与壳体内部连通，同样能够保证电解液的流通需求，提高电解液的利用率。
在一些实施例中，凹槽还包括连接部，连接部用于与电池单体的绝缘膜连接。
本申请实施例提供的端盖组件，通过使得凹槽包括连接部，能够通过连接部与绝缘膜连接，增加绝缘膜与绝缘件之间的连接面积，进而保证二者之间的连接强度。
在一些实施例中，绝缘件还包括加强筋，加强筋设置于凹槽并与凹槽的壁部连接。
本申请实施例提供的端盖组件，通过使得绝缘件还包括加强筋，并使得加强筋设置于凹槽并与凹槽的壁部连接，能够增加绝缘件设置凹槽位置的强度，保证绝缘件的性能要求。
在一些实施例中，加强筋将凹槽分隔形成两个以上槽单元，每个槽单元能够通过至少一个连通槽与壳体的内腔连通。
本申请实施例提供端盖组件，通过使得加强筋将凹槽分隔形成两个以上槽单 元，同时使得每个槽单元能够通过至少一个连通槽与壳体的内腔连通，既能够保证绝缘件在凹槽位置的加强需求，同时，还能够避免各槽单元内封闭有电解液，保证电解液的利用率。
在一些实施例中，加强筋的数量为两个以上，两个以上加强筋中至少部分沿端盖的宽度方向间隔分布；其中，沿端盖的长度方向，每个加强筋的长度小于凹槽的槽宽。
本申请实施例提供的端盖组件，通过上述设置，能够通过两个以上加强筋对绝缘件设置凹槽的位置进行加强，保证强度要求，同时能够有效的避免对电解液的封闭，提高电解液的利用率。
在一些实施例中，加强筋呈矩形板状或者三角板状。
本申请实施例提供的端盖组件，加强筋采用上述形式，既能够满足加强需求，同时利于绝缘件的加工制造。
在一些实施例中，绝缘件包括绝缘本体以及限位凸起，绝缘本体与端盖层叠设置并相连接，沿厚度方向，限位凸起向背离端盖的一侧凸出于绝缘本体设置，凹槽贯穿绝缘本体设置并部分伸入限位凸起。
本申请实施例提供的端盖组件，通过设置限位凸起，既能够对绝缘件设置凹槽的位置达到提高强度的作用，同时，限位凸起可以用于抵压电极组件的主体部，对电极组件的主体部进行限位，并且限位凸起与绝缘本体之间的空间可以用于容纳转接片等结构，利于电池单体的成组。
在一些实施例中，绝缘件位于端盖的长度方向上两侧的凹槽彼此对称分布。
通过使得两侧凹槽对称分布，能够保证绝缘件受力的均衡性，同时利于绝缘件的加工制造。
在一些实施例中，绝缘件与端盖的一者上设置有卡接凸起且另一者上设置有卡槽，卡接凸起与卡槽的形状相匹配并卡接连接。
本申请实施例提供的端盖组件，通过使得绝缘件与端盖的一者上设置卡接凸起且另一者上设置卡槽，利于二者的卡接配合，保证二者的定位连接需求。
在一些实施例中，端盖上设置有泄压结构，绝缘件上设置有沿厚度方向贯穿的排气孔，沿厚度方向，泄压结构的正投影覆盖至少部分排气孔。
本申请实施例提供的端盖组件，通过在端盖上设置有泄压结构，绝缘件上设置有沿厚度方向贯穿的排气孔，沿厚度方向，泄压结构的正投影覆盖至少部分排气孔，利于将电池单体内部产生气体的排除，保证电池单体的安全性能。
第二方面，本申请提供了一种电池单体，包括：壳体，具有开口；电极组件，设置于壳体内；电解液，填充于壳体内；上述的端盖组件，端盖组件封闭开口设置，连通槽用于将凹槽与壳体的内腔连通。
第三方面，本申请提供了一种电池，包括箱体以及上述的电池单体，电池单体容纳于箱体内。
第四方面，本申请提供了一种用电装置，包括上述的电池单体，电池单体用于提供电能。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1是本申请一实施例提供的车辆的结构示意图；
图2是本申请一实施例提供的电池的结构示意图；
图3是本申请一实施例提供的一种电池单体的分解结构示意图；
图4是本申请一实施例提供的端盖组件的分解结构示意图；
图5是本申请一实施例提供的绝缘件的结构示意图；
图6是本申请另一实施例提供的绝缘件的结构示意图；
图7是本申请再一实施例提供的绝缘件的结构示意图；
图8是本申请又一实施例提供的绝缘件的结构示意图。
具体实施方式中的附图标号如下：
1000-车辆；
100-电池；200-控制器；300-马达；
10-箱体；11-第一部分；12-第二部分；
20-电池单体；
21-壳体；211-开口；
22-电极组件；
23-端盖组件；
231-端盖；231a-泄压结构；
232-电极端子；
233-绝缘件；2331-凹槽；2331a-槽单元；2332-连通槽；2333-壁部；23331-底壁；23332-侧壁；2334-加强筋；2335-卡接凸起；2336-排气孔；2337-连接部；233a-绝缘本体；233b-限位凸起；
24-绝缘膜；
X-长度方向；Y-宽度方向；Z-厚度方向。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
需要注意的是，除非另有说明，本申请实施例使用的技术术语或者科学术语应当为本申请实施例所属领域技术人员所理解的通常意义。
在本申请实施例的描述中，技术术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
此外，技术术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
在本申请实施例的描述中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接 触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
电池单体通常包括壳体、电极组件、电解液以及端盖组件，端盖组件盖合于外壳上，以为电极组件和电解液提供一个密闭的空间，电极组件与端盖组件的电极端子电连接，电极组件的电能可通过端盖组件的电极端子引出至外壳外。
本发明人注意到，已有的电池单体，其端盖组件的绝缘板朝向端盖的一侧会设置有凹槽，既能够减轻端盖组件的重量，同时，能够增加电池单体内部的容纳空间，提高电池单体的空间利用率，缓解电池内部紧张的注液残空间，提高电解液利用率。然而，经过检测发现，现有技术中通过在电池端盖组件上设置凹槽的方式并不能提高电解液利用率，本发明人进一步研究发现，绝缘件上的凹槽与端盖之间形成了封闭的腔室，一则电解液难以进入凹槽，再则，装配完成后注入凹槽内的电解液几乎被封闭设置，很难流入壳体的内部与电极组件接触反应，以此，导致电解液的利用率较低。
为了缓解电解液利用率低的问题，申请人研究发现，可以通过将凹槽与壳体的内部连通，使得电解液可以在凹槽以及凹槽的内部流通，保证电解液全部能够与电极组件充分接触反应，以提高电解液的利用率。
基于以上考虑，为了解决电解液利用率低的问题，发明人经过深入研究，设计了一种端盖组件，端盖组件用于电池单体，端盖组件包括端盖以及绝缘件，绝缘件设置于端盖面向电池单体内部的一侧，沿端盖的长度方向，绝缘件的两端相对设置有凹槽，沿端盖的厚度方向，凹槽由绝缘件朝向端盖的表面向背离端盖的方向凹陷设置；其中，凹槽的壁部包括连通槽，连通槽用于将凹槽与电池单体的壳体的内腔连通。
在这样的电池单体中，通过使得绝缘件沿端盖的长度方向的两端相对设置有凹槽，利用凹槽能够容纳电解液，增加端盖组件所应用的电池单体的电解液的容量，提高电池单体内部的空间利用率。同时，连通槽的设置，使得凹槽可以与电池单体的壳体的内腔连通，使得电解液可以在凹槽以及壳体的内部流通，避免部分电解液被封闭在凹槽内，提高电解液的利用率。
本申请实施例描述的技术方案适用于电池单体、电池以及使用电池的用电装置。
用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、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；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具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，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等等。本申请实施例对上述用电装置不做特殊限制。
应理解，本申请实施例描述的技术方案不仅仅局限适用于上述所描述的电池单体、电池以及使用电池的用电装置，还可以适用于所有包括电池单体、电池以及使用电池的用电装置，但为描述简洁，下述实施例均以电动车辆为例进行说明。
请参照图1，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。
在一些实施例中，电池100不仅仅可以作为车辆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，电池100包括箱体10和电池单体20，电池单体20收容于箱体10内。箱体10用于为电池单体20提供密闭空间，箱体10可以是多种形状，比如，圆柱体、长方体等。图2中，示例性的，箱体10为长方体。
在一些实施例中，如图2所示，箱体10可以包括第一部分11和第二部分12，第一部分11与第二部分12相互盖合，以限定出用于容纳电池单体20的密封空间13。第一部分11可以是一侧开口的空心结构，第二部分12也可以是一侧开口的空心结构，第二部分12的开口侧盖合于第一部分11的开口侧，则形成具有密封空间13的箱体10。
在图2中，第二部分12位于第一部分11的上侧，第二部分12也可以称之为上箱体，第一部分11也可以称之为下箱体。
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10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，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体10内。电池单体20可呈圆柱体、扁平体、长方体或其它形状等。
在一些实施例中，电池单体20为多个，多个电池单体20先串联或并联或混联组成电池模块，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体10内。
在一些实施例中，电池100还可以包括汇流部件，多个电池单体20之间可通过汇流部件实现电连接，以实现多个电池单体20的串联或并联或混联。以两个电池单体20串联为例，一个电池单体20的正电极端子与另一个电池单体20的负电极端子通过汇流部件连接，以实现两个电池单体20的串联。
请参照图3，电池单体20可以包括外壳21、电极组件22和端盖组件23以及绝缘膜24，外壳21具有开口211，电极组件22容纳于外壳21内，端盖组件23包括盖板231和电极端子232，盖板231用于封盖于开口211，电极端子232用于与电极组件22电连接。
外壳21的材质也可以是多种，比如，铜、铁、铝、不锈钢、铝合金等，本申请实施例对此不作特殊限制。
外壳21可以是多种形状，比如，圆柱体、长方体等。外壳21的形状可根据电极组件22的具体形状来确定。比如，若电极组件22为圆柱体结构，外壳21则可选用为圆柱体结构；若电极组件22为长方体结构，外壳21则可选用长方体结构。
在图3中，示例性的，外壳21和电极组件22均为长方体结构。
电极组件22可以包括正极片、负极片和隔离膜。在一些实施例中，电极组件22可以是由正极片、隔离膜和负极片通过卷绕形成的卷绕式结构。在又一些实施例中，电极组件22也可以是由正极片、隔离膜和负极片通过层叠布置形成的层叠式结构。
在一些实施例中，电极组件22还可以包括正极极耳(图未示出)和负极极耳(图未示出)，可以是正极片中未涂覆正极活性物质层的正极集流体作为正极极耳，可以是负极片中未涂覆负极活性物质层的负极集流体作为负极极耳。
在本申请实施例中，端盖组件23的盖板231用于封盖外壳21的开口211，以 形成用于容纳电池单体20的密闭空间(图未示出)。密闭空间还用于容纳电解质，例如电解液。端盖组件23的电极端子232作为输出电极组件22的电能的部件，电极端子232用于与电极组件22电连接，即电极端子232与电极组件22的极耳电连接，比如，电极端子232与极耳通过转接片连接，以实现电极端子232与极耳的电连接。
需要说明的，外壳21的开口211可以是一个，也可以是两个。
在一些实施例中，如图3所示，外壳21的开口211为一个，端盖组件23也可以为一个，端盖组件23中可设置两个电极端子232，两个电极端子232分别为正极电极端子和负极电极端子，正极电极端子和负极电极端子分别用于与电极组件22正极极耳和负极极耳电连接。具有这种结构的电池单体20可以是方形电池单体20。
在又一些实施例中，外壳21的开口211为两个，比如，两个开口211设置在外壳21相对的两侧，端盖组件23也可以为两个，两个端盖组件23分别盖合于外壳21的两个开口211处。在这种情况下，可以是一个端盖组件23中的电极端子232为正极电极端子，用于与电极组件22的正极极耳电连接；另一个端盖组件23中的电极端子232为负极电极端子，用于与电极组件22的负极片222电连接。具有这种结构的电池单体20可以是柱形电池单体20。
绝缘膜24包围电极组件22设置，绝缘膜24的形状可以与壳体21的形状相匹配并位于壳体21的内腔，绝缘膜24用于使得电极组件22与壳体21绝缘设置。
如图4以及图5所示，本申请提供的端盖组件23，用于电池单体20，端盖组件23包括端盖231以及绝缘件233，绝缘件233设置于端盖231面向电池单体20内部的一侧，沿端盖231的长度方向X，绝缘件233的两端相对设置有凹槽2331，沿端盖231的厚度方向Z，凹槽2331由绝缘件233朝向端盖231的表面向背离端盖231的方向凹陷设置；其中，凹槽2331的壁部2333包括连通槽2332，连通槽2332用于将凹槽2331与电池单体20的壳体21的内腔连通。
可选地，端盖231是盖合于壳体21的开口以将电池单体20的内部环境与外部环境隔绝的部件。端盖231与壳体21共同限定出用于容纳电极组件22、电解液以及其他部件的密封空间。
可选地，端盖231的形状可以与壳体21的形状适配，比如，壳体21为长方体结构，端盖231为与壳体21相适配的矩形板状结构，再如，壳体21为圆柱体结构，端盖231为与壳体21相适配的圆形板状结构。端盖231的材质也可以是多种，比如，铜、铁、铝、钢、铝合金等，端盖231的材质与壳体21的材质可以相同，也可以不同。
可选地，端盖231可以呈板状结构体，具有预定的长度、宽度以及厚度。
可选地，端盖231上可以设置有电极端子232，电极端子232用于与电极组件22电连接，以输出电池单体20的电能。电极端子232可以包括正极电极端子和负极电极端子，正极电极端子用于与正极极耳电连接，负极电极端子用于与负极极耳电连接。正极电极端子与正极极耳可以直接连接，也可以间接连接，负极电极端子与负极极耳可以直接连接，也可以间接连接。
可选地，绝缘件233用于将端盖231与电极组件22绝缘设置。绝缘件233的形状可以与端盖231的形状相匹配。
可选地，绝缘件233在端盖231长度方向X上两端设置的凹槽2331的形状可以相同，也可以不同，凹槽2331在端盖231的厚度方向Z上的正投影可以是圆形、椭圆形或者多边形。
可选地，在端盖231的厚度方向Z，凹槽2331的深度小于绝缘件233的厚度。
可选地，凹槽2331在厚度方向Z上朝向端盖231的一侧形成开口。
可选地，凹槽2331可以包括底壁23331以及侧壁23332，连通槽2332可以设置在底壁23331上，当然也可以设置在侧壁23332上，也可以在底壁23331以及侧壁23332上均设置连通槽2332。
可选地，凹槽2331的壁部2333设置的连通槽2332的数量可以为一个，当然也可以为两个以上，当为两个以上时，两个以上连通槽2332彼此间隔设置。
本申请实施例提供的端盖组件23，通过使得绝缘件233沿端盖231的长度方向X的两端相对设置有凹槽2331，利用凹槽2331能够容纳电解液，增加端盖组件23所应用的电池单体20的电解液的容量，提高电池单体20内部的空间利用率。同时，连通槽2332的设置，使得凹槽2331可以与电池单体20的壳体21的内腔连通，使得电解液可以在凹槽2331以及壳体21的内部流通，避免部分电解液被封闭在凹槽2331内，提高电解液的利用率。
在一些实施例中，连通槽2332的数量为两个以上，两个以上连通槽2332彼此间隔设置。
可选地，可以使得每个凹槽2331的侧壁23332上设置的连通槽2332的数量为两个以上，也可以使得每个凹槽2331的底壁23331上设置的连通槽2332的数量为两个以上。
本申请实施例提供的端盖组件23，通过使得连通槽2332的数量设置为两个 以上，利于凹槽2331与壳体21内部进行多通道连通，保证电解液在壳体21的内部以及凹槽2331内流动。
在一些实施例中，壁部2333包括底壁23331以及侧壁23332，连通槽2332设置于侧壁23332。
可选地，壁部2333在厚度方向Z上朝向端盖231的部分为底壁23331，壁部2333围绕底壁23331设置的部分为侧壁23332，连通槽2332设置于侧壁23332。
可选地，连通槽2332可以由侧壁23332在厚度方向Z上朝向端盖231的一端起始沿厚度方向Z凹陷设置。
可选地，连通槽2332可以在端盖231的长度方向X贯穿侧壁23332，也可以在端盖231的宽度方向Y贯穿侧壁23332。
本申请实施例提供的端盖组件23，通过在侧壁23332上设置连通槽2332，既能够保证凹槽2331与壳体21内部的连通需求，同时，绝缘件233朝向电极组件22的一侧用于抵压电极组件22的主体部分，通过将连通槽2332设置于凹槽2331的侧壁23332，能够增加底壁23331与电极组件22的接触面积，保证端盖231与电极组件22的主体部分之间的绝缘设置要求。
在一些实施例中，至少部分数量连通槽2332沿端盖231的长度方向X贯穿凹槽2331的侧壁23332设置。
可选地，凹槽2331的侧壁23332包括第一壁、第二壁以及第三壁，第一壁以及第二壁在端盖231的宽度方向Y上相对设置，第三壁沿端盖231的宽度方向Y延伸并连接在第一壁以及第二壁之间。至少部分数量的连通槽2332可以沿端盖231的长度方向X贯穿侧壁23332的第三壁。
本申请实施例提供的端盖组件23，通过限定至少部分数量连通槽2332沿端盖231的长度方向X贯穿凹槽2331的侧壁23332设置。使得凹槽2331可以在端盖231的长度方向X的一侧与壳体21内部连通，保证电解液的流通需求，提高电解液的利用率。
如图6所示，在一些实施例中，至少部分数量连通槽2332沿端盖231的宽度方向Y贯穿凹槽2331的侧壁23332设置。
可选地，至少部分数量的连通槽2332可以沿端盖231的宽度方向Y贯穿第一壁以及第二壁中的一者，当然，可以使得部分数量的连通槽2332贯穿第一壁，且部分数量的连通槽2332贯穿第二壁。
本申请实施例提供的端盖组件23，通过限定至少部分数量连通槽2332沿端 盖231的宽度方向Y贯穿凹槽2331的侧壁23332设置。使得凹槽2331可以在宽度方向Y的至少一侧与壳体21内部连通，同样能够保证电解液的流通需求，提高电解液的利用率。
可以理解的是，本申请实施例提供的端盖组件23，其可以仅使得连通槽2332沿端盖231的长度方向X贯穿凹槽2331的侧壁23332设置，也可以仅使得连通槽2332沿端盖231的宽度方向Y贯穿凹槽2331的侧壁23332设置，当然，还可以同时使得部分数量的连通槽2332沿端盖231的长度方向X贯穿凹槽2331的侧壁23332设置，且部分数量的连通槽2332沿端盖231的宽度方向Y贯穿凹槽2331的侧壁23332设置。
在一些实施例中，凹槽2331还包括连接部2337，连接部2337用于与电池单体20的绝缘膜24连接。
可选地，凹槽2331的侧壁23332去除材料形成连通槽2332后，侧壁23332上的剩余部分可以理解为连接部2337。
可选地，当连通槽2332的数量为多个时，侧壁23332上相邻两个连通槽2332之间的部分可以理解为连接部2337。
本申请实施例提供的端盖组件23，通过使得凹槽2331包括连接部2337，能够通过连接部2337与绝缘膜24连接，增加绝缘膜24与绝缘件233之间的连接面积，进而保证二者之间的连接强度。
作为一种可选地实施方式，本申请实施例提供的端盖组件23，绝缘件233还包括加强筋2334，加强筋2334设置于凹槽2331并与凹槽2331的壁部2333连接。
可选地，加强筋2334可以与凹槽2331的底壁23331连接，加强筋2334也可以同时与凹槽2331的底壁23331以及侧壁23332连接。
可选地，加强筋2334可以为板状结构体。
可选地，加强筋2334的数量可以为一个，当然也可以为两个以上，当为两个以上时，两个以上加强筋2334可以彼此间隔设置。
本申请实施例提供的端盖组件23，通过使得绝缘件233还包括加强筋2334，并使得加强筋2334设置于凹槽2331并与凹槽2331的壁部2333连接，能够增加绝缘件233设置凹槽2331位置的强度，保证绝缘件233的性能要求。
在一些实施例中，加强筋2334将凹槽2331分隔形成两个以上槽单元2331a，每个槽单元2331a能够通过至少一个连通槽2332与壳体21的内腔连通。
可选地，加强筋2334可以与凹槽2331的侧壁23332以及底壁23331均连接，以将凹槽2331分隔形成多个槽单元2331a。
可选地，槽单元2331a的数量可以为两个、三个或者更多个。
可选地，两个以上槽单元2331a可以沿端盖231的宽度方向Y分布。
可选地，每个槽单元2331a可以通过一个连通槽2332与壳体21的内腔连通，当然，每个槽单元2331a也可以通过两个及以上连通槽2332与壳体21的内腔连通。
本申请实施例提供端盖组件23，通过使得加强筋2334将凹槽2331分隔形成两个以上槽单元2331a，同时使得每个槽单元2331a能够通过至少一个连通槽2332与壳体21的内腔连通，既能够保证绝缘件233在凹槽2331位置的加强需求，同时，还能够避免各槽单元2331a内封闭有电解液，保证电解液的利用率。
在一些实施例中，加强筋2334的数量为两个以上，两个以上加强筋2334中至少部分沿端盖231的宽度方向Y间隔分布；其中，沿端盖231的长度方向X，每个加强筋2334的长度小于凹槽2331的槽宽。
可选地，可以使得两个以上加强筋2334全部沿端盖231的宽度方向Y间隔分布，当然，此为一种可选地实施方式，在有些实施例中，还可以使得两个以上加强筋2334部分沿宽度方向Y间隔分布，且部分沿端盖231的长度方向X间隔分布，只要能够保证加强需求均可。
可选地，沿端盖231的长度方向X，每个加强筋2334的长度小于凹槽2331的槽宽，使得相邻两个加强筋2334之间的空间连通。
本申请实施例提供的端盖组件23，通过上述设置，能够通过两个以上加强筋2334对绝缘件233设置凹槽2331的位置进行加强，保证强度要求，同时能够有效的避免对电解液的封闭，提高电解液的利用率。
在一些实施例中，加强筋2334呈矩形板状或者三角板状。
可选地，加强筋2334可以呈矩形板状结构，当然，在有些实施例中，加强筋2334也可以呈三角板状，当加强筋2334的数量为两个以上时，两个以上加强筋2334可以全部呈矩形板状结构，当然也可以全部呈三角板状。在有些示例中，还可以使得部分加强筋2334呈矩形板状结构，部分加强筋2334呈三角板状结构。
本申请实施例提供的端盖组件23，加强筋2334采用上述形式，既能够满足加强需求，同时利于绝缘件233的加工制造。
在一些实施例中，绝缘件233包括绝缘本体233a以及限位凸起233b，绝缘 本体233a与端盖231层叠设置并相连接，沿厚度方向Z，限位凸起233b向背离端盖231的一侧凸出于绝缘本体233a设置，凹槽2331贯穿绝缘本体233a设置并部分伸入限位凸起233b。
可选地，沿厚度方向Z，绝缘凸起的正投影面积可以大于凹槽2331的正投影面积。
可选地，沿端盖231的宽度方向Y，限位凸起233b的延伸尺寸可以等于端盖231的延伸尺寸。
本申请实施例提供的端盖组件23，通过设置限位凸起233b，既能够对绝缘件233设置凹槽2331的位置达到提高强度的作用，同时，限位凸起233b可以用于抵压电极组件22的主体部，对电极组件22的主体部进行限位，并且限位凸起233b与绝缘本体233a之间的空间可以用于容纳转接片等结构，利于电池单体20的成组。
在一些实施例中，绝缘件233位于端盖231的长度方向X上两侧的凹槽2331彼此对称分布。
可选地，两侧的凹槽2331可以在端盖231的长度方向X上对称分布。
本申请实施例提供的端盖组件23，通过使得两侧凹槽2331对称分布，能够保证绝缘件233受力的均衡性，同时利于绝缘件233的加工制造。
在一些实施例中，绝缘件233与端盖231的一者上设置有卡接凸起2335且另一者上设置有卡槽，卡接凸起2335与卡槽的形状相匹配并卡接连接。
可选地，可以在绝缘件233上设置卡接凸起2335，在端盖231上设置卡槽。当然，也可以在绝缘件233上设置开槽，在端盖231上设置卡接凸起2335。
本申请实施例提供的端盖组件23，通过使得绝缘件233与端盖231的一者上设置卡接凸起2335且另一者上设置卡槽，利于二者的卡接配合，保证二者的定位连接需求。
在一些实施例中，本申请实施例提供的端盖组件23，端盖231上设置有泄压结构231a，绝缘件233上设置有沿厚度方向Z贯穿的排气孔2336，沿厚度方向Z，泄压结构231a的正投影覆盖至少部分排气孔2336。
可选地，泄压结构231a可以是泄压阀，可以是设置在端盖231上的刻痕等薄弱区。
本申请实施例提供的端盖组件23，通过在端盖231上设置有泄压结构231a，绝缘件233上设置有沿厚度方向Z贯穿的排气孔2336，沿厚度方向Z，泄压结构231a的正投影覆盖至少部分排气孔2336，利于将电池单体20内部产生气体的排 除，保证电池单体20的安全性能。
根据本申请的一些实施例，本申请还提供了一种电池单体20，包括壳体21、电极组件22、电解液以及上述的端盖组件23。壳体21具有开口，电极组件22设置于壳体21内。电解液填充于壳体21内。端盖组件23封闭开口设置，连通槽2332用于将凹槽2331与壳体21的内腔连通。
根据本申请的一些实施例，本申请还提供了一种电池，包括以上任一方案所述的电池单体20。
根据本申请的一些实施例，本申请还提供了一种用电装置，包括以上任一方案所述的电池，并且电池用于为用电装置提供电能。
用电装置可以是前述任一应用电池的设备或系统。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各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，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，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范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (17)

  1. 一种端盖组件，用于电池单体，其特征在于，所述端盖组件包括：
    端盖；
    绝缘件，设置于所述端盖面向所述电池单体内部的一侧，沿所述端盖的长度方向，所述绝缘件的两端相对设置有凹槽，沿所述端盖的厚度方向，所述凹槽由所述绝缘件朝向所述端盖的表面向背离所述端盖的方向凹陷设置；
    其中，所述凹槽的壁部包括连通槽，所述连通槽用于将所述凹槽与所述电池单体的壳体的内腔连通。
  2. 根据权利要求1所述的端盖组件，其特征在于，所述连通槽的数量为两个以上，两个以上所述连通槽彼此间隔设置。
  3. 根据权利要求1或2所述的端盖组件，其特征在于，所述壁部包括底壁以及侧壁，所述连通槽设置于所述侧壁。
  4. 根据权利要求3所述的端盖组件，其特征在于，至少部分数量所述连通槽沿所述端盖的长度方向贯穿所述凹槽的所述侧壁设置。
  5. 根据权利要求3所述的端盖组件，其特征在于，至少部分数量所述连通槽沿所述端盖的宽度方向贯穿所述凹槽的所述侧壁设置。
  6. 根据权利要求3至5任意一项所述的端盖组件，其特征在于，所述凹槽还包括连接部，所述连接部用于与所述电池单体的绝缘膜连接。
  7. 根据权利要求1至6任意一项所述的端盖组件，其特征在于，所述绝缘件还包括加强筋，所述加强筋设置于所述凹槽并与所述凹槽的壁部连接。
  8. 根据权利要求7所述的端盖组件，其特征在于，所述加强筋将所述凹槽分隔形成两个以上槽单元，每个所述槽单元能够通过至少一个所述连通槽与所述壳体的内腔连通。
  9. 根据权利要求7所述的端盖组件，其特征在于，所述加强筋的数量为两个以上，两个以上所述加强筋中至少部分沿所述端盖的宽度方向间隔分布；
    其中，沿所述端盖的长度方向，每个所述加强筋的长度小于所述凹槽的槽宽。
  10. 根据权利要求7所述的端盖组件，其特征在于，所述加强筋呈矩形板状或者三角板状。
  11. 根据权利要求1至10任意一项所述的端盖组件，其特征在于，所述绝缘件包括绝缘本体以及限位凸起，所述绝缘本体与所述端盖层叠设置并相连接，沿所述厚度方向，所述限位凸起向背离所述端盖的一侧凸出于所述绝缘本体设置，所述凹槽贯穿所述绝缘本体设置并部分伸入所述限位凸起。
  12. 根据权利要求1至11任意一项所述的端盖组件，其特征在于，所述绝缘件位于所述端盖的长度方向上两侧的所述凹槽彼此对称分布。
  13. 根据权利要求1至12任意一项所述的端盖组件，其特征在于，所述绝缘件与所述端盖的一者上设置有卡接凸起且另一者上设置有卡槽，所述卡接凸起与所述卡槽的形状相匹配并卡接连接。
  14. 根据权利要求1至13任意一项所述的端盖组件，其特征在于，所述端盖上设置有泄压结构，所述绝缘件上设置有沿所述厚度方向贯穿的排气孔，沿所述厚度方向，所述泄压结构的正投影覆盖至少部分所述排气孔。
  15. 一种电池单体，其特征在于，包括：
    壳体，具有开口；
    电极组件，设置于所述壳体内；
    电解液，填充于所述壳体内；
    如权利要求1至14任意一项所述的端盖组件，所述端盖组件封闭所述开口设置，所述连通槽用于将所述凹槽与所述壳体的内腔连通。
  16. 一种电池，包括箱体以及多个如权利要求15所述的电池单体，所述电池单体容纳于所述箱体内。
  17. 一种用电装置，包括：如权利要求15所述的电池单体，所述电池单体用于提供电能。
PCT/CN2022/118121 2022-07-06 2022-09-09 端盖组件、电池单体、电池以及用电装置 WO2024007447A1 (zh)

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