WO2023160257A1 - 电芯顶盖、电芯、电池、用电设备以及注液嘴 - Google Patents
电芯顶盖、电芯、电池、用电设备以及注液嘴 Download PDFInfo
- Publication number
- WO2023160257A1 WO2023160257A1 PCT/CN2023/070204 CN2023070204W WO2023160257A1 WO 2023160257 A1 WO2023160257 A1 WO 2023160257A1 CN 2023070204 W CN2023070204 W CN 2023070204W WO 2023160257 A1 WO2023160257 A1 WO 2023160257A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid injection
- pressing surface
- hole
- top cover
- injection nozzle
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 276
- 238000002347 injection Methods 0.000 title claims abstract description 265
- 239000007924 injection Substances 0.000 title claims abstract description 265
- 238000003825 pressing Methods 0.000 claims description 179
- 238000007789 sealing Methods 0.000 abstract description 55
- 238000004891 communication Methods 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 description 64
- 238000000034 method Methods 0.000 description 25
- 230000008569 process Effects 0.000 description 24
- 239000000243 solution Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
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- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
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- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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- 239000007773 negative electrode material Substances 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present application relates to the field of battery technology, in particular to a battery cell top cover, a battery cell, a battery, electrical equipment and a liquid injection nozzle.
- lithium batteries as a new energy source, have rapidly entered people's field of vision and are widely used in various fields.
- the preparation process of lithium batteries includes a liquid injection process, that is, the electrolyte is injected into the battery cell through the liquid injection hole on the top cover of the battery cell by using a liquid injection device.
- a liquid injection process that is, the electrolyte is injected into the battery cell through the liquid injection hole on the top cover of the battery cell by using a liquid injection device.
- electrolyte residues in the liquid injection hole after liquid injection.
- the electrolyte affects the quality of the cell.
- the purpose of the embodiment of the present application is to provide a cell top cover, cell, battery, electrical equipment and liquid injection nozzle, which can effectively solve the problem of electrolyte residue in the liquid injection hole after liquid injection in the prior art, which affects The problem of battery quality.
- the application provides a battery cell top cover, including a top cover body, and a liquid injection hole is provided on the top cover body;
- the liquid injection hole includes first hole sections arranged in sequence along the thickness direction of the top cover body and connected to each other. , the second hole section and the third hole section, the first hole section is closer to the battery core relative to the second hole section; a step surface is formed between the end of the second hole section away from the first hole section and the third hole section, and the step surface is The first pressing surface; wherein, the first pressing surface is used to abut against the second pressing surface, and the liquid injection hole is used to communicate with the liquid injection channel, so as to pass the liquid injection having the second pressing surface and the liquid injection channel Insert the nozzle into the liquid injection hole to inject liquid into the battery cell.
- a liquid injection hole including a first hole segment, a second hole segment, and a third hole segment is provided on the top cover body through its thickness direction, so that the liquid injection nozzle can be inserted into the liquid injection hole.
- the first pressing surface is set between the hole sections so that when the cell top cover and the liquid injection nozzle are matched, the first pressing surface can be aligned with the second pressing surface of the liquid injection nozzle in the liquid injection direction, that is, perpendicular to the direction of the cell top cover.
- the inner wall of the second hole segment is a tapered inner wall
- the tapered inner wall is used to cover the outer wall of the tapered part, so as to inject liquid into the battery cell through the liquid injection nozzle having the tapered part.
- the inner wall of the second hole section can also cooperate with the tapered part of the liquid injection nozzle to realize the fit and seal of the inclined surface, and the second hole
- the segment can also guide the insertion of the injection nozzle and improve the accuracy of intervention.
- the first pressing surface is a horizontal surface; or, the first pressing surface is provided with a recessed area.
- the first pressing surface As a horizontal surface, the positioning accuracy requirements for the second pressing surface of the liquid injection nozzle and the first pressing surface are relatively low, and the surface-to-surface sealing effect can be achieved relatively easily and efficiently; the second pressing surface is ensured.
- the outside of the three-hole section will not be polluted by the electrolyte, avoiding explosion points when the liquid injection hole is subsequently welded with the sealing nail.
- the horizontal surface can effectively increase the contact area with the second pressing surface, and the surface-to-surface sealing can be realized by using the pressing force in the direction perpendicular to the surface.
- the second pressing surface of the liquid injection nozzle is correspondingly provided with a raised area matching the concave area of the first pressing surface, so that the first pressing surface and the second pressing surface can be realized Positioning and sealing press fit between faces.
- the projected area of the first pressing surface along the first direction is a first area; wherein, the first area is larger than the first pressing surface and the second pressing surface when the first pressing surface abuts against the second pressing surface.
- the contact area of the two pressing surfaces; the first direction is the thickness direction of the top cover body.
- the first pressing surface By setting the projected area of the first pressing surface along the first direction to be larger than the contact area when it contacts the second pressing surface, the first pressing surface extends the overflow path of the electrolyte, even if there is electrolyte leakage , and will not flow to the third hole section and its outside, so as to avoid affecting the subsequent welding with the sealing nail.
- the diameter of the first hole segment is a first diameter; wherein, the first diameter is larger than the diameter of the injection channel.
- the first hole section is the part closest to the inside of the cell, and the diameter of the first hole section is set to be larger than the diameter of the liquid injection channel on the liquid injection nozzle, thereby ensuring that the first hole section can be completely inserted into the liquid injection hole.
- the inner wall of the third hole section is a tapered inner wall; or the inner wall of the third hole section is a cylindrical inner wall.
- the inner wall of the third hole section can be set as a tapered inner wall or a cylindrical inner wall to achieve cooperation with the sealing nail.
- the present application provides a battery cell, including the aforementioned battery cell top cover.
- the present application provides a battery, including the aforementioned battery cell.
- the present application provides an electric device, including the aforementioned battery.
- the electric device is one of a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, a new energy vehicle, a ship, and a spacecraft.
- the electrical equipment using the battery provided by the embodiment of the present application has better performance of the battery, and the problem that the residual electrolyte affects the quality of the battery is improved.
- the present application provides a liquid injection nozzle, including a base body, one end of the base body is provided with a convex portion, and the base body is provided with a liquid injection channel passing through the base body and the convex portion along its axial direction; the end surface of the base body where the convex portion is located forms a The second pressing surface; wherein, the second pressing surface is used to abut against the first pressing surface, and the liquid injection channel is used to communicate with the liquid injection hole, so that the liquid injection nozzle can be inserted into the liquid injection hole and the first pressing surface. Fill the cell with liquid from the cell top cover on the side.
- the convex part can be inserted preferentially when the liquid injection nozzle is inserted into the liquid injection hole, and then play a direct role in drainage, effectively preventing electrolysis during the liquid injection process.
- the end of the base where the convex part is located except the convex part forms a second pressing surface, so that the liquid injection nozzle and the battery core top
- the second pressing surface can be tightly contacted with the first pressing surface of the cell top cover, so as to realize the surface sealing of the contact surface with a large contact area, and avoid
- the phenomenon of seal failure occurs during the liquid injection process, to achieve effective and reliable surface sealing effect, prevent electrolyte leakage during the liquid injection process, and solve the problem of electrolyte pollution; and the surface-to-surface contact seal can effectively reduce friction, so that the use of the liquid injection nozzle
- the service life is effectively extended, and the cost of production and maintenance is reduced.
- the convex portion is a tapered portion, and the outer wall of the tapered portion is used to be covered by the tapered inner wall of the second hole segment, so that when the liquid injection nozzle is inserted into the liquid injection hole, the tapered portion is inserted into the second hole.
- the convex portion is cylindrical.
- the convex part By setting the convex part as a tapered part, when the convex part is inserted into the liquid injection hole of the cell top cover, the convex part can be accurately inserted into the second hole segment of the liquid injection hole and covered by the second hole segment, and the injection
- the insertion of the nozzle acts as a guide and improves the accuracy of the intervention.
- the protrusion By arranging the protrusion in a cylindrical shape, the second hole section of the liquid injection hole is correspondingly also in a cylindrical shape, so that the circumferential sealing of the liquid injection channel and the insertion guide of the liquid injection nozzle can be realized.
- the second pressing surface is a horizontal surface; or the second pressing surface is an arc-shaped surface protruding toward the convex portion.
- the second pressing surface in order to cooperate with the first pressing surface to form a surface-to-surface seal, can be set as a horizontal surface or an arc-shaped surface facing the convex part, that is, facing the liquid injection hole, so as to enhance the diversified design of the contact surface, and further enhance Its realization, versatility and scope of application; when the second pressing surface is horizontal, it can easily realize the face-to-face pressing and sealing with the first pressing surface, and form a tight pressing in the direction perpendicular to the first pressing surface.
- the second pressing surface includes a horizontal surface, and the horizontal surface is provided with a continuous protrusion protruding toward the convex portion.
- the second pressing surface can not only be set as a simple horizontal plane or an arc-shaped surface, but also can be provided with a protrusion facing the convex part, that is, towards the liquid injection hole on the horizontal plane.
- the protrusion is continuously arranged around the axial direction of the base body, so as to In this way, when the liquid injection nozzle is pressed against the liquid injection hole by an external force, a relatively high pressure can be used to seal between the protrusion and the first pressing surface and prevent leakage of the electrolyte.
- the protrusion will also be compressed when pressed so that The horizontal surface where it is located is as close as possible to the first pressing surface to achieve face-to-face sealing.
- the horizontal surface is provided with concentric ring protrusions.
- the electrolyte can be sealed in multiple ways, so that even if the electrolyte leaks a little, the space between adjacent protrusions It can also play the role of containing and preventing the electrolyte from continuing to overflow, so that the electrolyte will not overflow to the outer step of the third hole section, thereby ensuring the final sealing effect of the sealing nail on the liquid injection hole.
- the projected area of the second pressing surface along the second direction is the second area; the second area is smaller than the area of the first pressing surface when the second pressing surface abuts against the first pressing surface;
- the two directions are the axial directions of the matrix.
- the projected area of the second pressing surface along the second direction is set to be smaller than the area of the first pressing surface when in contact with it, so as to prevent the electrolyte from flowing to the third hole section of the liquid injection hole to pollute the periphery of the liquid injection hole when it is in contact with it. Subsequent welding with sealing nails.
- the base body and the protrusion are integrally formed elastic structures.
- FIG. 1 is a schematic structural diagram of electrical equipment provided by some embodiments of the present application.
- Fig. 2 is a schematic diagram of the explosive structure of the battery provided by some embodiments of the present application.
- Fig. 3 is a schematic diagram of the explosive structure of the battery cell provided by some embodiments of the present application.
- Fig. 4 is a schematic structural diagram of the cell top cover provided by some embodiments of the present application.
- Fig. 5 is a schematic cross-sectional view of the liquid injection hole on the top cover of the battery provided by some embodiments of the present application and a liquid injection nozzle;
- Fig. 6 is a schematic cross-sectional view of the liquid injection hole on the top cover of the cell provided in some embodiments of the present application and another liquid injection nozzle;
- Fig. 7 is a schematic cross-sectional view of the liquid injection hole on the top cover of the cell provided by some embodiments of the present application and another liquid injection nozzle;
- Fig. 8 is a schematic diagram of the structural cooperation between the liquid injection hole and the liquid injection nozzle on the top cover of the battery cell provided by some embodiments of the present application.
- multiple refers to more than two (including two), similarly, “multiple groups” refers to two or more groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
- Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields . With the continuous expansion of power battery application fields, its market demand is also constantly expanding.
- the first pressing surface 24 and the second pressing surface 31 can be in close contact, and then the sealing area is increased through the surface-to-surface friction and bonding, preventing electrolyte leakage or even overflow
- the liquid injection hole will be polluted, which will affect the final sealing of the sealing nail.
- a cell top cover 1 and a liquid injection nozzle 3 cooperating with it are designed.
- the cell top cover 2 includes a top cover body 11, and the top cover body 11 is provided with a liquid injection hole 2
- the liquid injection hole 2 includes a first hole section 21, a second hole section 22 and a third hole section 23 which are arranged in sequence along the thickness direction of the top cover body 11 and communicate with each other.
- the first hole section 21 is relatively close to the second hole section 22 In the core; the second hole section 22 is away from the end of the first hole section 21 and a step surface is formed between the third hole section 23, and the step surface is the first pressing surface 24; wherein, the first pressing surface 24 is used for the first pressing surface 24
- the two pressing surfaces 31 are abutted, and the liquid injection hole 2 is used to communicate with the liquid injection channel 32, so that the liquid injection nozzle 3 having the second pressing surface 31 and the liquid injection channel 32 is inserted into the liquid injection hole 2 to inject into the battery cell 20. liquid.
- the liquid injection nozzle 3 includes a base body 33, one end of the base body 33 is provided with a convex portion 34, and the base body 33 is provided with a liquid injection channel 32 passing through the base body 33 and the convex portion 34 along its axial direction; the end surface of the base body 33 where the convex portion 34 is located forms a second Two pressing surfaces 31; wherein, the second pressing surface 31 is used to abut against the first pressing surface 24, and the liquid injection channel 32 is used to communicate with the liquid injection hole 2, so that the liquid injection nozzle 3 is inserted into the liquid injection hole. 2 and the cell top cover 1 of the first pressing surface 24 to inject liquid into the cell 20 .
- the surface sealing of the surface-to-surface conflict with a large contact area is realized, to avoid the phenomenon of seal failure during the liquid injection process, to achieve an effective and reliable surface sealing effect, to prevent the electrolyte from leaking during the liquid injection process, and to solve the problem of electrolyte leakage during the liquid injection process.
- the problem of pollution; and the surface-to-surface contact seal can effectively reduce the friction force, so that the service life of the liquid injection nozzle can be effectively extended, and the cost of production and maintenance can be reduced.
- the cell top cover 1 disclosed in the embodiment of the present application can be used in lithium batteries, but is not limited to. It is possible to use the electrical equipment composed of the cell top cover 1 disclosed in the present application to form a battery cell, a battery, etc., and a power supply system composed of the electrical equipment.
- the effective seal between the battery and the liquid injection hole can easily cause electrolyte leakage during the liquid injection process, resulting in electrolyte pollution and affecting battery performance.
- the embodiment of the present application provides an electric device using a battery as a power source.
- the electric device can be but not limited to construction, military, travel, national defense, power supply and other fields, such as: mobile phone, tablet, notebook computer, electric toy, electric Tools, battery cars, electric cars, ships, spacecraft and more.
- electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc.
- spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.
- a vehicle 1000 as an electric device according to an embodiment of the present application is taken as an example.
- FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
- the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
- the interior of the vehicle 1000 is provided with a battery 100 , and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000 .
- the battery 100 can be used for power supply of the vehicle 1000 , for example, the battery 100 can be used as an operating power source of the vehicle 1000 .
- the vehicle 1000 may further include a controller 200 and a motor 300 , the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, for starting, navigating and running 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 oil or natural gas to provide driving power for the vehicle 1000 .
- FIG. 2 is an exploded view of a battery 100 provided by some embodiments of the present application.
- the battery 100 includes a box body 10 and a battery cell 20 , and the battery cell 20 is accommodated in the box body 10 .
- the box body 10 is used to provide an accommodation space for the electric core 20, and the box body 10 may adopt various structures.
- the box body 10 may include a first part 101 and a second part 102, the first part 101 and the second part 102 cover each other, and the first part 101 and the second part 102 jointly define a space for accommodating the electric core 20. Accommodate space.
- the second part 102 can be a hollow structure with one end open, the first part 101 can be a plate-shaped structure, and the first part 101 covers the opening side of the second part 102, so that the first part 101 and the second part 102 jointly define an accommodation space ;
- the first part 101 and the second part 102 can also be hollow structures with one side opening, and the opening side of the first part 101 is covered by the opening side of the second part 102 .
- the box body 10 formed by the first part 101 and the second part 102 may be in various shapes, such as a cylinder, a cuboid, and the like.
- the battery 100 there may be a plurality of battery cells 20 , and the multiple battery cells 20 may be connected in series, parallel or mixed.
- the mixed connection means that the multiple battery cells 20 are both connected in series and in parallel.
- a plurality of battery cells 20 can be directly connected in series or parallel or mixed together, and then the whole body composed of a plurality of battery cells 20 is housed in the box body 10; of course, the battery 100 can also be a plurality of battery cells 20 first connected in series or
- a battery module is formed by connecting in parallel or in series, and multiple battery modules are connected in series or in parallel or in series to form a whole, and are housed in the case 10 .
- the battery 100 may also include other structures, for example, the battery 100 may also include a current flow component for realizing electrical connection between multiple battery cells 20 .
- each cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but not limited thereto.
- the battery core 20 may be in the form of a cylinder, a flat body, a cuboid or other shapes.
- FIG. 3 is a schematic diagram of an exploded structure of the battery cell 20 provided by some embodiments of the present application.
- the battery cell 20 refers to the smallest unit constituting a battery.
- the cell 20 includes a cell top cover 1 , a casing 202 , an electrode assembly 203 and other functional components.
- the battery cell top cover 1 refers to a component that covers the opening of the casing 202 to isolate the internal environment of the battery cell 20 from the external environment.
- the shape of the cell top cover 1 can be adapted to the shape of the casing 202 to match the casing 202 .
- the cell top cover 1 can be made of a material (such as aluminum alloy) with a certain hardness and strength, so that the cell top cover 1 is not easily deformed when it is squeezed and collided, so that the cell 20 can have With higher structural strength, safety performance can also be improved.
- Functional components such as electrode terminals 21 a may be provided on the cell top cover 1 .
- the electrode terminal 21 a can be used for electrical connection with the electrode assembly 203 for outputting or inputting electric energy of the cell 20 .
- the cell top cover 1 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the cell 20 reaches a threshold value.
- the material of the cell top cover 1 can also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.
- an insulator can be provided inside the cell top cover 1 , and the insulator can be used to isolate the electrical connection components in the housing 202 from the cell top cover 1 to reduce the risk of short circuit.
- the insulating member may be plastic, rubber or the like.
- the casing 202 is a component used to cooperate with the cell top cover 1 to form an internal environment of the cell 20 , wherein the formed internal environment can be used to accommodate the electrode assembly 203 , electrolyte and other components.
- the casing 202 and the cell top cover 1 can be independent components, and an opening can be provided on the casing 202 , and the internal environment of the cell 20 can be formed by making the cell top cover 1 cover the opening at the opening.
- the cell top cover 1 and the casing 202 can also be integrated. Specifically, the cell top cover 1 and the casing 202 can form a common connection surface before other components are put into the casing.
- the housing 202 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the casing 202 may be determined according to the specific shape and size of the electrode assembly 203 .
- the housing 202 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.
- the electrode assembly 203 is a component in the cell 20 where the electrochemical reaction occurs.
- One or more electrode assemblies 203 may be contained within the housing 202 .
- the electrode assembly 203 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and a separator is usually provided between the positive electrode sheets and the negative electrode sheets.
- the part of the positive electrode sheet and the negative electrode sheet with the active material constitutes the main body of the cell assembly, and usually the parts of the positive electrode sheet and the negative electrode sheet without the active material respectively constitute tabs (not shown in the figure).
- the positive pole tab and the negative pole tab can be located at one end of the main body together or at two ends of the main body respectively.
- the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the electrode terminal 21a to form a current loop.
- the present application provides a cell top cover 1, which includes a top cover body 11 on which a There is a liquid injection hole 2; the liquid injection hole 2 includes a first hole segment 21, a second hole segment 22 and a third hole segment 23 which are sequentially arranged and connected along the thickness direction of the top cover body 11, and the first hole segment 21 is opposite to the second hole segment.
- the hole section 22 is close to the inside of the battery core; a stepped surface is formed between the second hole section 22 away from the end of the first hole section 21 and the third hole section 23, and the stepped surface is the first pressing surface 24; wherein, the first pressing surface 24 is used to abut against the second pressing surface 31, and the liquid injection hole 2 is used to communicate with the liquid injection channel 32, so that the liquid injection nozzle 3 having the second pressing surface 31 and the liquid injection channel 32 can be inserted into the liquid injection hole 2 Fill the battery cell 20 with liquid.
- the top cover body 11 is a main component mainly covering the opening of the casing 202 to isolate the internal environment of the battery cell 20 from the external environment.
- the shape of the top cover body 11 can be adapted to the shape of the housing 202 to match the housing 202 .
- the top cover body 11 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the cell top cover 11 is not easily deformed when it is squeezed and collided, so that the cell 20 can have higher structural strength , safety performance can also be improved.
- the top cover body 11 may also be provided with functional components such as electrode terminals and a pressure relief mechanism.
- the liquid injection hole 2 is a through hole that runs through the thickness direction of the top cover body 11, and the liquid injection nozzle 3 is inserted into the liquid injection hole 2 when injecting liquid into the battery cell 20, and the liquid injection hole 2 includes first hole sections 21 connected in sequence. , the second hole section 22 and the third hole section 23, wherein the first hole section 21 is closer to the inside of the battery cell 20, so that the transition electrolyte can lead the electrolyte solution into the inside of the battery cell 20; the second hole section 22 It is used to cooperate with the convex part 34 of the liquid injection nozzle 3 for bonding and sealing; the third hole section 23 is used to cooperate with the sealing nail for final sealing after liquid injection.
- the first hole segment 21 is directly connected to the second hole segment 22
- the second hole segment 22 is not directly connected to the third hole segment 23
- a stepped surface is formed at the end of the second hole segment 22 facing the third hole segment 23
- at least the third hole section 23 has a different hole diameter from the other two hole sections.
- the stepped surface is the first pressing surface 24, which is used for sealing and pressing with the liquid injection nozzle 3 when injecting the electrolyte into the battery cell 20;
- the first pressing surface 24 can be a horizontal surface or a non-horizontal surface , for example: a recessed area is set on the horizontal surface, as long as it can cooperate with the second pressing surface 31 of the liquid injection nozzle 3 to realize the face-to-face pressing and sealing on the first pressing surface 24, for example: when the first pressing When the surface 24 is a horizontal surface, the second pressing surface 31 can be a horizontal surface or have a convex form facing the first pressing surface 24; when the first pressing surface 24 is provided with a recessed area, the second pressing surface The surface 31 is provided with a corresponding raised area, which ensures that the raised area and the depressed area can be just pressed together during pressing, and the cooperation of the depressed area and the raised area can realize the first pressing surface 24 and the second pressing Positioning and sealing fit between faces 31.
- the liquid injection nozzle 3 can be inserted into the liquid injection hole 2 to the battery cell.
- Liquid injection at this time, the electrolyte enters the battery cell 20 through the first hole section 21, and then plays a direct drainage role, effectively preventing leakage when the electrolyte flows into the battery cell during the liquid injection process; at the same time, the embodiment of the present application
- the first pressing surface 24 is set between the second hole section 22 and the third hole section 23 so that when the cell top cover 1 and the liquid injection nozzle 3 are matched, the first pressing surface 24 can be in contact with the liquid injection
- the second pressing surface 31 of the nozzle 3 is in close contact with the liquid injection direction, that is, the direction perpendicular to the cell top cover 1, so as to realize the surface sealing of the surface contact surface with a large contact area, and avoid seal failure during the liquid injection process phenomenon, to achieve an effective and reliable surface sealing effect,
- the inner wall of the second hole section 22 is a tapered inner wall, and the tapered inner wall is used to cover the tapered
- the outer wall of the part is used to inject liquid into the battery cell 20 through the liquid injection nozzle 3 having a tapered part.
- the inner wall of the second hole section 22 can also cooperate with the tapered part of the liquid injection nozzle 3 to realize the matching seal of the inclined surface, Moreover, the second hole segment 22 can also guide the insertion of the liquid injection nozzle 3 and improve the insertion accuracy.
- the first pressing surface 24 is a horizontal surface.
- the first pressing surface 24 is set as a horizontal surface, so that when the second pressing surface 31 of the liquid injection nozzle 3 abuts against the first pressing surface 24, the positioning accuracy requirements are relatively low, and the positioning accuracy can be relatively simple and efficient. Realize the surface-to-surface sealing effect; ensure that the outside of the third hole section 23, that is, the outer step, will not be polluted by the electrolyte, and avoid affecting the subsequent welding of the liquid injection hole 2 with the sealing nail; at the same time, the horizontal surface can effectively increase the bonding surface with the second 31 contact area, using the pressing force in the direction perpendicular to the surface to achieve face-to-face sealing.
- the projected area of the first pressing surface 24 along the first direction a is the first area; wherein, The first area is larger than the contact area between the first pressing surface 24 and the second pressing surface 31 when the first pressing surface 24 contacts the second pressing surface 31 ; the first direction a is the thickness direction of the top cover body 11 .
- the first pressing surface 24 By setting the projected area of the first pressing surface 24 along the first direction a to be greater than the contact area when it contacts the second pressing surface 31, the first pressing surface 24 extends the hole wall of the second hole section 22
- the distance between the third hole section 23 and the hole wall along the radial direction of the liquid injection hole 2, that is, referring to accompanying drawings 4 to 7, the size of the first pressing surface 24 in the left and right direction in the figure is larger than that of the second pressing surface 24.
- the size of the joint surface 31 in the left and right direction in the figure or the width of the first joint surface 24 is greater than the width of the second joint plane 31, thereby prolonging the overflow path of the electrolyte from the first hole segment 21 to the outside, even if there is electrolysis
- the liquid will not leak, and will not flow to the junction of the first pressing surface 24 and the third hole section 23, the third hole section 23 and its outer side, that is, the outer step, so as to avoid affecting the subsequent welding with the sealing nail.
- the diameter of the first hole segment 21 is a first diameter; wherein, the first diameter is larger than the injection channel 32 in diameter.
- the first hole section 21 is the part closest to the inside of the cell.
- the diameter of the first hole section 21 is set to be larger than the diameter of the liquid injection channel 32 on the liquid injection nozzle 3, thereby ensuring that when the liquid injection nozzle 3 is inserted into the liquid injection hole 2
- the projection of the first hole segment 21 along the first direction a can completely accommodate or cover the projection of the liquid injection channel 32 along the first direction a, so that when the electrolyte flows into the inside of the cell 20 through the first hole segment 21 , the electrolyte
- the flow velocity in the first hole section 21 is greater than the flow velocity in the liquid injection channel 32, so as to ensure that the electrolyte injected by the liquid injection nozzle 3 from the liquid injection channel 32 can all enter the first hole section 21 of the liquid injection hole 2, that is, It can play a sufficient role in guiding and draining the electrolyte and can prevent the electrolyte from overflowing to a certain extent.
- the inner wall of the third hole section 23 is a tapered inner wall; or the inner wall of the third hole section 23 is a cylindrical inner wall.
- the shape of the inner wall only needs to be able to cooperate with the sealing nail for sealing connection.
- the inner wall of the third hole section 23 can also be set in a cylindrical shape, such as: a cylinder, a square cylinder, etc., which can be set according to actual needs, as long as it can cooperate with the sealing nail.
- the present application provides a battery cell 20 , which includes the aforementioned battery cell top cover 1 .
- the present application also provides a battery 100 , including the battery cell 20 of any of the above schemes.
- the present application also provides an electric device, including a battery 100 according to any of the solutions above, and the battery 100 is used to provide electric energy for the electric device.
- the powered device may be any of the aforementioned devices or systems using batteries.
- the present application provides a liquid injection nozzle 3, which includes a base body 33, one end of the base body 33 is provided with a convex portion 34, and the base body 33 is arranged along its axial direction.
- liquid injection channel 32 passing through the base body 33 and the convex portion 34; the end surface of the base body 33 where the convex portion 34 is located forms a second pressing surface 31; wherein, the second pressing surface 31 is used to abut against the first pressing surface 24 , the liquid injection channel 32 is used to communicate with the liquid injection hole 2 , so that the liquid injection nozzle 3 is inserted into the cell top cover 1 having the liquid injection hole 2 and the first pressing surface 24 to inject liquid into the cell 20 .
- the base body 33 is a liquid injection structure that mainly cooperates with the liquid injection hole 2, and the base body 33 can be rigid or elastic, as long as it can be inserted into the liquid injection hole 2 to cooperate with it.
- the shape and size of the base body 33 are not too limited here, as long as it can be connected with the liquid injection device and communicated to lead the electrolyte from the liquid injection device to the battery cell 20 .
- the convex portion 34 is a structure protruding from one end surface of the base body 3, and the convex portion 34 cooperates with the second hole section 22 of the liquid injection hole 2 to perform the coating and sealing of the liquid injection channel 32 in the circumferential direction and the insertion guide of the liquid injection nozzle;
- the shape and size of the portion 34 will not be described in detail here, as long as the convex portion 34 fits the second hole segment 22 , for example, a tapered portion, a cylinder, and the like.
- the convex portion 34 does not occupy the entire area of the end surface of the base body 33 where it is located, and then forms a second pressing surface 31 on the end surface not covered by the convex portion 34, and utilizes the first pressing surface 31 of the second pressing surface 31 and the liquid injection hole 2.
- the pressing surfaces 24 abut against each other to increase the contact area and achieve surface-to-surface sealing.
- the convex part 34 can be inserted preferentially when the liquid injection nozzle 3 is inserted into the liquid injection hole 2, and then play a role of direct drainage, effectively preventing the electrolyte from flowing into the cell during the liquid injection process
- the second pressing surface 31 is formed on the end of the base 33 where the convex portion 34 is located, so that the liquid injection nozzle 3 and the electric
- the second pressing surface 31 can closely contact the first pressing surface 24 of the cell top cover 1, realizing surface-to-surface friction with a large contact area
- the surface seal can avoid the phenomenon of seal failure during the liquid injection process, realize effective and reliable surface sealing effect, prevent the electrolyte leakage during the liquid injection process, and solve the problem of electrolyte pollution; and the surface seal can effectively reduce the friction force, so that The service life of the liquid injection nozzle 3 is
- the convex part 34 is a tapered part, and the outer wall of the tapered part is used to be covered by the tapered inner wall of the second hole segment 22, so that When the liquid injection nozzle 3 is inserted into the liquid injection hole 2 , the tapered part is inserted into the liquid injection hole 2 with the second hole section 22 .
- the convex portion 34 As a tapered portion, when the convex portion 34 is inserted into the liquid injection hole 2 of the cell top cover 1, the convex portion 34 can be accurately inserted into the second hole segment 22 of the liquid injection hole 2 and be second The hole segment 22 is covered, and the lower end of the tapered portion is small in size, which can accurately connect the liquid injection channel 32 to the liquid injection hole 2, guide the insertion of the liquid injection nozzle 3 and improve the accuracy of intervention.
- the second pressing surface 31 is a horizontal surface; or the second pressing surface 31 is an arc-shaped surface protruding toward the convex portion 34 .
- the second pressing surface 31 By arranging the second pressing surface 31 as a horizontal surface or an arc-shaped surface to cooperate with the first pressing surface 24, not only surface-to-surface sealing can be achieved, but also the diversified design of the contact surface can be enhanced, thereby enhancing its practicality, versatility and Scope of application; Specifically, when the second pressing surface 31 is a horizontal plane, the contact areas of the first pressing surface 24 and the second pressing surface 31 are all effective areas, and the contact area can be easily realized under the premise of increasing the contact area.
- the face-to-face pressing and sealing of the first pressing surface 24 forms a tight pressing in the direction perpendicular to the first pressing surface 24, which effectively solves the phenomenon of sealing failure during the liquid injection process, thereby preventing electrolyte leakage;
- the second pressing surface 31 is a protruding arc-shaped surface
- the arc-shaped surface can also be compressed to form a flat surface that fits the first pressing surface 24.
- the greater the pressure on the part of the liquid channel 32 the overflow of the electrolyte can be blocked, and the pressure corresponding to the arc surface is distributed in a gradient, gradually decreasing from the liquid injection channel 32 outwards, which can also prevent sealing failure.
- the arc surface may be a 1/8 arc surface.
- the second pressing surface 31 includes a horizontal surface, and the horizontal surface is provided with a continuous protrusion 35 protruding toward the convex portion 34 .
- the second pressing surface 31 can not only be set as a simple horizontal plane or an arc-shaped surface, but also can be provided with a protrusion 35 facing the convex portion 34, that is, facing the liquid injection hole 2 on the horizontal plane, and the protrusion 35 surrounds the base 33
- the axial direction is continuously arranged so that when the liquid injection nozzle 3 is pressed against the liquid injection hole 2 by an external force, a relatively large pressure can be used to seal between the protrusion 35 and the first pressing surface 24 and prevent the leakage of the electrolyte, and at the same time
- the protrusion 35 When the protrusion 35 is pressed, it will also be compressed so that the horizontal surface where it is located is in contact with the first pressing surface 24 as much as possible to achieve a face-to-face seal.
- the protrusion 35 can also be a concentric ring protrusion formed by a plurality of spaced and concentric rings arranged on the horizontal surface to achieve multi-channel sealing. Under such a setting, even if there is a slight leakage of the electrolyte, adjacent The space between the protrusions 35 can also accommodate and prevent the electrolyte from overflowing, so as to ensure that the electrolyte will not overflow to the outer step of the third hole section 23, thereby ensuring the final sealing of the sealing nail.
- the projected area of the second pressing surface 31 along the second direction b is the second area; the second area is smaller than the second pressing surface 31 The area of the first pressing surface 24 when it abuts against the first pressing surface 24 ; the second direction b is the axial direction of the base body 33 .
- the first pressing surface 24 extends the hole wall of the second hole section 22 and the first pressing surface 24
- the hole segment 23 pollutes the perip
- the base 33 and the protrusion 34 are integrally formed elastic structures.
- the base body 33 and the convex portion 34 can be provided as an integrally formed elastic structure, such as rubber material; through integral molding, the strength and sealing degree between the base body 33 and the convex portion 34 are reliable, and the liquid injection nozzle 3
- the cooperation between the substrate 33 and the liquid injection hole 2 of the cell top cover 1 has little influence on the liquid injection process, and unnecessary leakage points are avoided.
- the present application provides a cell top cover 1 and a liquid injection nozzle 3 used in conjunction with it;
- the cell top cover 2 includes a top cover body 11, the top cover body 11 is provided with a liquid injection hole 2;
- the liquid injection hole 2 includes a first hole section 21, a second hole section 22 and a third hole section 23 arranged in sequence along the thickness direction of the top cover body 11 and connected to each other.
- the second hole section 22 is closer to the battery core; the second hole section 22 forms a step surface between the end of the second hole section 22 away from the first hole section 21 and the third hole section 23, that is, the first pressing surface 24, and the inner wall of the second hole section 22 Conical inner wall.
- the liquid injection nozzle 3 includes a base body 33, one end of the base body 33 is provided with a conical convex portion 34, and the base body 33 is provided with a liquid injection channel 32 passing through the base body 33 and the convex portion 34 along its axial direction; the base body 33 where the convex portion 34 is located
- the end surface forms a second pressing surface 31; wherein, when the conical convex portion 34 is inserted into the conical second hole section 22, the liquid injection channel 32 communicates with the first hole section 21 of the liquid injection hole 2, and the second hole section 22 Covering the outer wall of the convex part 34, the second pressing surface 31 is in close contact with the first pressing surface 24, and the liquid injection nozzle 3 can pass through the cell top cover 1 with the liquid injection hole 2 and the first pressing surface 24 to the battery.
- the core 20 is filled with liquid.
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Abstract
本申请公开一种电芯顶盖（1）、电芯（20）、电池（100）、用电设备以及注液嘴（3）。电芯顶盖（1）包括顶盖本体（11），顶盖本体（11）上设有注液孔（2）；注液孔（2）包括沿顶盖本体（11）厚度方向依次设置且相连通的第一孔段（21）、第二孔段（22）以及第三孔段（23），第二孔段（22）远离第一孔段（21）的一端与第三孔段（23）之间形成第一压合面（24）。第一压合面（24）能够和注液嘴（3）的第二压合面（31）抵触，实现面密封。
Description
本申请要求于2022年02月23日在中国专利局提交的、申请号为202220376675.6、发明名称为“电芯顶盖、电芯、电池、用电设备以及注液嘴”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本申请涉及电池技术领域，具体涉及一种电芯顶盖、电芯、电池、用电设备以及注液嘴。
随着社会的发展进步，锂电池作为新能源迅速进入人们的视野，被广泛应用于各领域。
锂电池的制备过程中包括注液工序，即利用注液装置将电解液通过电芯顶盖上的注液孔注入电芯内部，但是，注液后注液孔经常会有电解液残留，残留电解液影响电芯质量。
本申请实施例的目的在于：提供一种电芯顶盖、电芯、电池、用电设备以及注液嘴，能够有效解决现有技术中注液后注液孔经常会有电解液残留，影响电芯质量的问题。
本申请实施例采用的技术方案是：
第一方面，本申请提供了一种电芯顶盖，包括顶盖本体，顶盖本体上设有注液孔；注液孔包括沿顶盖本体厚度方向依次设置且相连通的第一孔段、第二孔段以及第三孔段，第一孔段相对第二孔段靠近电芯内；第二孔段远离第一孔段的一端与第三孔段之间形成台阶面，台阶面为第一压合面；其中，第一压合面用于与第二压合面抵接，注液孔用于与注液通道连通，以通过具有第二压合面和注液通道的注液嘴插入注液孔向电芯注液。
本申请实施例的技术方案中，通过在顶盖本体上贯穿其厚度方向设置包括第一孔段、第二孔段以及第三孔段的注液孔，使得注液嘴能够插入注液孔向电芯内注液，进而起到直接地引流作用，有效防止注液过程中电解液流入电芯内时发生泄漏现象；同时，本申请实施例的技术方案中，在第二孔段和第三孔段之间设置第一压合面使得电芯顶盖和注液嘴配合时，第一压合面能够和注液嘴的第二压合面在注液方向也就是垂直电芯顶盖的方向上进行紧密抵触，实现接触面积较大的面面抵触的面密封，避免在注液过程中出现密封失效的现象，实现有效可靠的面密封效果，防止注液过程电解液泄露，解决电解液污染的问题；并且面面接触密封有效减小摩擦力，使电芯顶盖的使用寿命有效延长，降低生产及维护的成本。
在一些实施例中，第二孔段的内壁为锥状内壁，锥状内壁用于包覆锥状部的外壁，以通过具有锥状部的注液嘴向电芯注液。
通过将第二孔段的内壁设置为锥状内壁使得注液嘴插入注液孔时，第二孔段的内壁也能够与注液嘴的锥状部配合实现斜面的配合密封，并且第二孔段还能够对注液嘴的插入起到导向且提高介入精度的作用。
在一些实施例中，第一压合面为水平表面；或者，第一压合面设有凹陷区域。
通过将第一压合面设置为水平表面使得注液嘴的第二压合面与第一压合面压合时定位精度要求较低，能够较为简便且高效的实现面面密封效果；保证第三孔段的外侧不会被电解液污染，避免注液孔后续与密封钉进行焊接时出现爆点。同时水平表面能够有效增大与第二压合面的接触面积，利用在垂直该表面方向上的压紧力实现面面密封。通过在第一压合面设置凹陷区域，注液嘴的第二压合面相应地设置与第一压合面的凹陷区域配合的凸起区域，可实现第一压合面和第二压合面之间的定位和密封压合。
在一些实施例中，第一压合面沿第一方向的投影面积为第一面积；其中，第一面积大于第一压合面与第二压合面抵接时第一压合面与第二压合面接触的面积；第一方向为顶盖本体的厚度方向。
通过将第一压合面沿第一方向的投影面积设置为大于其与第二压合面接触时的接触面积，从而使得第一压合面延长了电解液的外溢路径，即使有电解液泄露，也不会流至第三孔段以及其外侧，避免影响后续与密封钉的焊接。
在一些实施例中，第一孔段的直径为第一直径；其中，第一直径大于注液通道的直径。
第一孔段为最靠近电芯内部的部分，将第一孔段的直径设置为大于注液嘴上注液通道的直径，进而能够保证注液嘴插入注液孔时第一孔段能够完全容纳注液通道，以保证注液嘴由注液通道注出的电解液能够全部进入注液孔的第一孔段，既能够对电解液起到足够的导向引流作用又能够在一定程度上防止电解液外溢。
在一些实施例中，第三孔段的内壁为锥状内壁；或者第三孔段的内壁为筒状内壁。
第三孔段的内壁可以设置为锥状内壁或筒状内壁以实现与密封钉的配合即可。
第二方面，本申请提供了一种电芯，包括前述的电芯顶盖。
第三方面，本申请提供了一种电池，包括前述的电芯。
第四方面，本申请提供了一种用电设备，包括前述的电池。
在一些实施例中，用电设备为手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、新能源汽车、轮船、航天器中的一种。
采用本申请实施例提供的电池的用电设备其电池具有更好的性能，改善了残留电解液影响电池质量的问题。
第五方面，本申请提供了一种注液嘴，包括基体，基体的一端设有凸部，基体沿其轴向设有贯穿基体和凸部的注液通道；凸部所在的基体的端面形成第二压合面；其中，第二压合面用于与第一压合面抵接，注液通道用于与注液孔连通，以使注液嘴插入具有注液孔和第一压合面的电芯顶盖向电芯注液。
本申请实施例的技术方案中，通过在注液嘴的一端设置凸部，使得注液嘴插入注液孔时凸部能够优先插入，进而起到直接地引流作用，有效防止注液过程中电解液流入电芯内时发生泄漏现象；同时，本申请实施例的技术方案中，凸部所在的基体的端部上除了凸部的区域形成第二压合面，使得注液嘴和电芯顶盖配合时，注液嘴受外力下压时，第二压合面能够紧密抵触在电芯顶盖的第一压合面上，实现接触面积较大的面面抵触的面密封，避免在注液过程中出现密封失效的现象，实现有效可靠的面密封效果，防止注液过程中电解液泄露，解决电解液污染的问题；并且面面接触密封有效减小摩擦力，使注液嘴的使用寿命有效延长，降低生产及维护的成本。
在一些实施例中，凸部为锥状部，锥状部的外壁用于被第二孔段的锥状内壁包覆，以使注液嘴插入注液孔时，锥状部插入具有第二孔段的注液孔；
或者，凸部为圆柱状。
通过将凸部设置为锥状部，使得凸部向电芯顶盖的注液孔插入时，凸部能够准确插入至注液孔的第二孔段内被第二孔段包覆，对注液嘴的插入起到导向且提高介入精度的作用。通过将凸部设置为圆柱状，注液孔的第二孔段相应地也为圆柱状，可实现注液通道圆周方向的包覆密封以及注液嘴的插入导向。
在一些实施例中，第二压合面为水平表面；或者第二压合面为朝向凸部突出的弧状面。
本实施例中为配合第一压合面形成面面密封可以将第二压合面设置为水平表面或朝向凸部即朝向注液孔的弧状面，以增强接触面的多样化设计，进而增强其实现性、通用性以及适用范围；当第二压合面为水平面时则能够轻易实现与第一压合面的面面压合密封，在垂直第一压合面的方向上形成严密的压合，有效应解决在注液过程中出现密封失效的现象，从而防止电解液泄露；当第二压合面为突出弧状面时，当注液嘴受外力压向注液孔时，弧状面也能够压缩形成平面与第一压合面相贴合，同样能够起到防止密封失效的作用。
在一些实施例中，第二压合面包括水平表面，且水平表面上设有朝向凸部突出且连续的凸起。
本实施例中第二压合面不仅仅可以设置成单纯的水平面或弧状面，还可以在水平面上设置朝向凸部即朝向注液孔的凸起，凸起绕基体的轴向连续设置，以使得在注液嘴受外力压向注液孔时，凸起与第一压合面之间能够通过较大的压力进行密封并阻拦电解液的泄露，同时凸起在被压时也会压缩使得其所在的水平表面尽可能的与第一压合面进行贴合实现面面密封。
在一些实施例中，水平表面设有同心环凸起。
通过在第二压合面上设置多个间隔且同心的圆环形成的同心环凸起，可对电解液实现多道密封，这样即使电解液有些许泄露，相邻的凸起之间的空间也能够起到容纳及阻拦电解液继续外溢的作用，使得电解液不会溢出至第三孔段的外台阶处，进而保证了密封钉对注液孔的最终密封效果。
在一些实施例中，第二压合面沿第二方向的投影面积为第二面积；第二面积小于第二压合面与第一压合面抵接时第一压合面的面积；第二方向为基体的轴向。
将第二压合面沿第二方向的投影面积设置为小于与其接触时第一压合面的面积，防止电解液泄露时流至注液孔的第三孔段处污染注液孔外围，影响后续与密封钉的焊接。
在一些实施例中，基体与凸部为一体成型的弹性结构。
通过一体成型使得基体与凸部之间的密封程度可靠，避免出现不必要的泄漏点。
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。
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或示范性技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为本申请一些实施例提供的用电设备的结构示意图；
图2为本申请一些实施例提供的电池的爆炸结构示意图；
图3为本申请一些实施例提供的电芯的爆炸结构示意图；
图4为本申请一些实施例提供的电芯顶盖的结构示意图；
图5为本申请一些实施例提供的电芯顶盖上注液孔与一种注液嘴配合状态下的截面示意图；
图6为本申请一些实施例提供的电芯顶盖上注液孔与另一种注液嘴配合状态下的截面示意图；
图7为本申请一些实施例提供的电芯顶盖上注液孔与又一种注液嘴配合状态下的截面示意图；
图8为本申请一些实施例提供的电芯顶盖上注液孔与注液嘴的结构配合示意图。
具体实施方式中的附图标号如下：
电芯顶盖1、顶盖本体11、注液孔2、第一孔段21、第二孔段22、第三孔段23、第一压合面24、注液嘴3、第二压合面31、注液通道32、基体33、凸部34、凸起35、车辆1000、电池100、箱体10、第一部分101、第二部分102、电芯20、壳体202、电极组件203、电极端子21a、控制器200、马达300、第一方向a、第二方向b。
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本申请。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：存在A，同时存在A和B，存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上（包括两个），同理，“多组”指的是两组以上（包括两组），“多片”指的是两片以上（包括两片）。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”、“相连”、“连接”、“固定”、“设置”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。
为了说明本申请所提供的技术方案，以下结合具体附图及实施例进行详细说明。
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。
本发明人注意到，对电芯进行电解液的注入多采用通过注液装置配合电芯上的注液孔向电芯内部注液，注液后通过密封钉将注液孔密封的方式，注液完成后注液口经常有残留电解液，影响电芯的质量；经过长期的研究发现电解液的残留是由于注液装置的注液嘴与注液孔间的气密性不良导致的，其无法满足注液过程中的密封要求。
为了解决现有技术中无法保证注液嘴与注液孔之间的有效密封，极易造成注液过程中电解液的泄露，产生电解液污染，影响电池性能的问题，申请人研究发现，可以通过在电芯顶盖1的注液孔2中设置第一压合面24，在注液嘴3上与注液孔2配合的端面上设置第二压合面31，使得注液嘴3配合注液孔2向电芯内注液时，第一压合面24和第二压合面31能够紧密抵触，进而通过面与面的抵触贴合以增大密封面积，避免电解液泄露甚至溢出至注液孔外部污染注液孔，影响密封钉的最终密封。
基于以上考虑，为了解决现有技术中无法保证注液嘴与注液孔之间的有效密封，极易造成注液过程中电解液的泄露，产生电解液污染，影响电池性能的问题，发明人经过深入研究，参考附图8，设计了一种电芯顶盖1和与其相互配合的注液嘴3，电芯顶盖2包括顶盖本体11，顶盖本体11上设有注液孔2；注液孔2包括沿顶盖本体11厚度方向依次设置且相连通的第一孔段21、第二孔段22以及第三孔段23，第一孔段21相对第二孔段22靠近电芯内；第二孔段22远离第一孔段21的一端与第三孔段23之间形成台阶面，台阶面为第一压合面24；其中，第一压合面24用于与第二压合面31抵接，注液孔2用于与注液通道32连通，以通过具有第二压合面31和注液通道32的注液嘴3插入注液孔2向电芯20注液。注液嘴3包括基体33，基体33的一端设有凸部34，基体33沿其轴向设有贯穿基体33和凸部34的注液通道32；凸部34所在的基体33的端面形成第二压合面31；其中，第二压合面31用于与第一压合面24抵接，注液通道32用于与注液孔2连通，以使注液嘴3插入具有注液孔2和第一压合面24的电芯顶盖1向电芯20注液。
在这样的电芯顶盖1和注液嘴3中，通过在注液嘴3上凸部34和电芯顶盖1上注液孔2的配合，使得注液嘴3插入注液孔2时凸部34能够优先插入，进而起到直接地引流作用，有效防止注液过程中电解液流入电芯20内时发生泄漏现象；同时，注液嘴3上凸部34所在的基体33的端部形成第二压合面31与注液孔2内第一压合面21配合，使得注液嘴3受外力下压时，第二压合面31能够紧密抵触在电芯顶盖1的第一压合面21上，实现接触面积较大的面面抵触的面密封，避免在注液过程中出现密封失效的现象，实现有效可靠的面密封效果，防止注液过程电解液泄露，解决电解液污染的问题；并且面面接触密封有效减小摩擦力，使注液嘴的使用寿命有效延长，降低生产及维护的成本。
本申请实施例公开的电芯顶盖1可以但不限用于锂电池中。可以使用具备本申请公开的电芯顶盖1组成电池单体、电池等组成的用电设备，以及利用该用电设备组成的电源系统，这样，有利于解决现有技术中无法保证注液嘴与注液孔之间的有效密封，极易造成注液过程中电解液的泄露，产生电解液污染，影响电池性能的问题。
本申请实施例提供一种使用电池作为电源的用电设备，用电设备可以为但不限于建筑、军事、旅行、国防、电力供应等领域，例如：手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，电动玩具可以包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以下实施例为了方便说明，以本申请一实施例的一种用电设备为车辆1000为例进行说明。
请参照图1，图1为本申请一些实施例提供的车辆1000的结构示意图。车辆1000可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池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100的爆炸图。电池100包括箱体10和电芯20，电芯20容纳于箱体10内。其中，箱体10用于为电芯20提供容纳空间，箱体10可以采用多种结构。在一些实施例中，箱体10可以包括第一部分101和第二部分102，第一部分101与第二部分102相互盖合，第一部分101和第二部分102共同限定出用于容纳电芯20的容纳空间。第二部分102可以为一端开口的空心结构，第一部分101可以为板状结构，第一部分101盖合于第二部分102的开口侧，以使第一部分101与第二部分102共同限定出容纳空间；第一部分101和第二部分102也可以是均为一侧开口的空心结构，第一部分101的开口侧盖合于第二部分102的开口侧。当然，第一部分101和第二部分102形成的箱体10可以是多种形状，比如，圆柱体、长方体等。
在电池100中，电芯20可以是多个，多个电芯20之间可串联或并联或混联，混联是指多个电芯20中既有串联又有并联。多个电芯20之间可直接串联或并联或混联在一起，再将多个电芯20构成的整体容纳于箱体10内；当然，电池100也可以是多个电芯20先串联或并联或混联组成电池模块形式，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体10内。电池100还可以包括其他结构，例如，该电池100还可以包括汇流部件，用于实现多个电芯20之间的电连接。
其中，每个电芯20可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电芯20可呈圆柱体、扁平体、长方体或其它形状等。
请参照图3，图3为本申请一些实施例提供的电芯20的爆炸结构示意图。电芯20是指组成电池的最小单元。如图3，电芯20包括有电芯顶盖1、壳体202、电极组件203以及其他的功能性部件。
电芯顶盖1是指盖合于壳体202的开口处以将电芯20的内部环境隔绝于外部环境的部件。不限地，电芯顶盖1的形状可以与壳体202的形状相适应以配合壳体202。可选地，电芯顶盖1可以由具有一定硬度和强度的材质（如铝合金）制成，这样，电芯顶盖1在受挤压碰撞时就不易发生形变，使电芯20能够具备更高的结构强度，安全性能也可以有所提高。电芯顶盖1上可以设置有如电极端子21a等的功能性部件。电极端子21a可以用于与电极组件203电连接，以用于输出或输入电芯20的电能。在一些实施例中，电芯顶盖1上还可以设置有用于在电芯20的内部压力或温度达到阈值时泄放内部压力的泄压机构。电芯顶盖1的材质也可以是多种的，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。在一些实施例中，在电芯顶盖1的内侧还可以设置有绝缘件，绝缘件可以用于隔离壳体202内的电连接部件与电芯顶盖1，以降低短路的风险。示例性的，绝缘件可以是塑料、橡胶等。
壳体202是用于配合电芯顶盖1以形成电芯20的内部环境的组件，其中，形成的内部环境可以用于容纳电极组件203、电解液以及其他部件。壳体202和电芯顶盖1可以是独立的部件，可以于壳体202上设置开口，通过在开口处使电芯顶盖1盖合开口以形成电芯20的内部环境。不限地，也可以使电芯顶盖1和壳体202一体化，具体地，电芯顶盖1和壳体202可以在其他部件入壳前先形成一个共同的连接面，当需要封装壳体202的内部时，再使电芯顶盖1盖合壳体202。壳体202可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体202的形状可以根据电极组件203的具体形状和尺寸大小来确定。壳体202的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
电极组件203是电芯20中发生电化学反应的部件。壳体202内可以包含一个或更多个电极组件203。电极组件203主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片具有活性物质的部分构成电芯组件的主体部，通常正极片和负极片不具有活性物质的部分各自构成极耳（图中未示出）。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳连接电极端子21a以形成电流回路。
根据本申请的一些实施例，参照附图4、附图5、附图6以及附图7，本申请提供了一种电芯顶盖1，其包括顶盖本体11，顶盖本体11上设有注液孔2；注液孔2包括沿顶盖本体11厚度方向依次设置且相连通的第一孔段21、第二孔段22以及第三孔段23，第一孔段21相对第二孔段22靠近电芯内；第二孔段22远离第一孔段21的一端与第三孔段23之间形成台阶面，台阶面为第一压合面24；其中，第一压合面24用于与第二压合面31抵接，注液孔2用于与注液通32道连通，以通过具有第二压合面31和注液通道32的注液嘴3插入注液孔2向电芯20注液。
其中，顶盖本体11为主要封盖于壳体202的开口处以将电芯20的内部环境隔绝于外部环境的主要部件。顶盖本体11的形状可以与壳体202的形状相适应以配合壳体202。顶盖本体11可以由具有一定硬度和强度的材质（如铝合金）制成，这样，电芯顶盖11在受挤压碰撞时就不易发生形变，使电芯20能够具备更高的结构强度，安全性能也可以有所提高。顶盖本体11上还可以设置有如电极端子、泄压机构等的功能性部件。
其中，注液孔2为贯穿顶盖本体11厚度方向的通孔，注液嘴3向电芯20内注液时则插入注液孔2，注液孔2包括依次连通的第一孔段21、第二孔段22以及第三孔段23，其中，第一孔段21更加的靠近电芯20的内部，以用于过渡电解液将电解液导入电芯20的内部；第二孔段22用于配合注液嘴3的凸部34进行贴合密封；第三孔段23用于与密封钉配合进行注液后的最终密封。第一孔段21与第二孔段22直接连通，第二孔段22与第三孔段23之间非直接连通，而是在第二孔段22朝向第三孔段23的一端形成台阶面后连接至第三孔段23，则至少第三孔段23与其他两个孔段的孔径不同。台阶面为第一压合面24，用于在向电芯20内注入电解液时配合注液嘴3进行密封压合；本实施例中第一压合面24可以为水平表面或非水平表面，例如：在水平表面上设置凹陷区域，只要能够与注液嘴3的第二压合面31配合实现第一压合面24上的面面压合密封即可，例如：当第一压合面24为水平表面时，第二压合面31可以为水平表面或具有朝向第一压合面24的凸起的形式；当第一压合面24上设有凹陷区域时，第二压合面31上设有对应的凸起区域，在压合时保证凸起区域和凹陷区域能够刚好对应压合，凹陷区域和凸起区域的配合，可实现第一压合面24和第二压合面31之间的定位和密封压合。
通过在顶盖本体11上贯穿其厚度方向设置包括第一孔段21、第二孔段22以及第三孔段23的注液孔2，使得注液嘴3能够插入注液孔2向电芯内注液，此时电解液经由第一孔段21进入电芯20，进而起到直接地引流作用，有效防止注液过程中电解液流入电芯内时发生泄漏现象；同时，本申请实施例的技术方案中，在第二孔段22和第三孔段23之间设置第一压合面24使得电芯顶盖1和注液嘴3配合时，第一压合面24能够和注液嘴3的第二压合面31在注液方向也就是垂直电芯顶盖1的方向上进行紧密抵触，实现接触面积较大的面面抵触的面密封，避免在注液过程中出现密封失效的现象，实现有效可靠的面密封效果，防止注液过程电解液泄露，解决电解液污染的问题；并且面面接触密封有效减小摩擦力，使电芯顶盖的使用寿命有效延长，降低生产及维护的成本。
根据本申请的一些实施例，可选地，参考附图4、附图5、附图6以及附图7，第二孔段22的内壁为锥状内壁，锥状内壁用于包覆锥状部的外壁，以通过具有锥状部的注液嘴3向电芯20注液。
通过将第二孔段22的内壁设置为锥状内壁使得注液嘴3插入注液孔时，第二孔段22的内壁也能够与注液嘴3的锥状部配合实现斜面的配合密封，并且第二孔段22还能够对注液嘴3的插入起到导向且提高介入精度的作用。
根据本申请的一些实施例，可选地，参考附图4、附图5、附图6以及附图7，第一压合面24为水平表面。
本实施例中将第一压合面24设置为水平表面，使得注液嘴3的第二压合面31与第一压合面24抵接时定位精度要求较低，能够较为简便且高效的实现面面密封效果；保证第三孔段23的外侧即外台阶不会被电解液污染，避免影响注液孔2后续与密封钉的焊接；同时水平表面能够有效增大与第二压合面31的接触面积，利用在垂直该表面方向上的压紧力实现面面密封。
根据本申请的一些实施例，可选地，参考附图4、附图5、附图6以及附图7，第一压合面24沿第一方向a的投影面积为第一面积；其中，第一面积大于第一压合面24与第二压合面31抵接时第一压合面24与第二压合面31接触的面积；第一方向a为顶盖本体11的厚度方向。
通过将第一压合面24沿第一方向a的投影面积设置为大于其与第二压合面31接触时的接触面积，从而使得第一压合面24延长了第二孔段22孔壁与第三孔段23孔壁之间沿着注液孔2径向方向上的距离，即参考附图4至附图7，第一压合面24在图中左右方向的尺寸大于第二压合面31在图中左右方向的尺寸或者说第一压合面24的宽度大于第二压合面31的宽度，从而延长了电解液由第一孔段21向外的外溢路径，即使有电解液泄露，也不会流至第一压合面24与第三孔段23的接壤处、第三孔段23以及其外侧即外台阶处，避免影响后续与密封钉的焊接。
根据本申请的一些实施例，可选地，参考附图4、附图5、附图6以及附图7，第一孔段21的直径为第一直径；其中，第一直径大于注液通道32的直径。
第一孔段21为最靠近电芯内部的部分，将第一孔段21的直径设置为大于注液嘴3上注液通道32的直径，进而能够保证注液嘴3插入注液孔2时第一孔段21沿第一方向a的投影能够完全容纳或者说覆盖注液通道32沿第一方向a的投影，进而电解液在经由第一孔段21流入电芯20的内部时，电解液在第一孔段21内的流速大于在注液通道32内的流速，以保证注液嘴3由注液通道32注出的电解液能够全部进入注液孔2的第一孔段21，既能够对电解液起到足够的导向引流作用又能够在一定程度上防止电解液外溢。
根据本申请的一些实施例，可选地，参考附图4至附图7，第三孔段23的内壁为锥状内壁；或者第三孔段23的内壁为筒状内壁。
通过将第三孔段23的内壁设置为锥状内壁实现与常规密封钉的配合，当然，对于第三孔段23来说，其内壁形状只要能够与密封钉配合进行密封连接即可，进而本实施例中还可以将第三孔段23的内壁设置为筒状，例如：圆筒、方形筒等等，可以根据实际需要进行设置，能够实现与密封钉的配合即可。
根据本申请的一些实施例，参照附图3，本申请提供了一种电芯20，其包括前述的电芯顶盖1。
根据本申请的一些实施例，参考附图2，本申请还提供了一种电池100，包括以上任一方案的电芯20。
根据本申请的一些实施例，参考附图1，本申请还提供了一种用电设备，包括以上任一方案的电池100，并且电池100用于为用电设备提供电能。用电设备可以是前述任一应用电池的设备或系统。
根据本申请的一些实施例，参照附图4至附图7，本申请提供了一种注液嘴3，其包括基体33，基体33的一端设有凸部34，基体33沿其轴向设有贯穿基体33和凸部34的注液通道32；凸部34所在的基体33的端面形成第二压合面31；其中，第二压合面31用于与第一压合面24抵接，注液通道32用于与注液孔2连通，以使注液嘴3插入具有注液孔2和第一压合面24的电芯顶盖1向电芯20注液。
其中，基体33为主要与注液孔2配合的注液结构，基体33可以是刚性的也可以是具有一定弹性的，只要能够插入注液孔2与其配合即可。基体33的形状和尺寸在此不做过多限定，只要能够与注液装置实现连接且连通将电解液由注液装置导入电芯20即可。
其中，凸部34为突出于基体3一端端面的结构，凸部34与注液孔2的第二孔段22配合进行注液通道32圆周方向的包覆密封以及注液嘴的插入导向；凸部34的形状和尺寸在此不做过多赘述，只要凸部34与第二孔段22相适配即可，例如：锥状部、圆柱等。并且凸部34并非占据其所在基体33的端面的全部面积，进而在未被凸部34覆盖的端面上形成第二压合面31，利用第二压合面31与注液孔2的第一压合面24相互抵接以增大接触面积并实现面面密封。
通过在注液嘴3的一端设置凸部34，使得注液嘴3插入注液孔2时凸部34能够优先插入，进而起到直接地引流作用，有效防止注液过程中电解液流入电芯内时发生泄漏现象；同时，本申请实施例的技术方案中，凸部34所在的基体33的端部上在除了凸部34的区域形成第二压合面31，使得注液嘴3和电芯顶盖1配合时，注液嘴3受外力下压时，第二压合面31能够紧密抵触在电芯顶盖1的第一压合面24上，实现接触面积较大的面面抵触的面密封，避免在注液过程中出现密封失效的现象，实现有效可靠的面密封效果，防止注液过程电解液泄露，解决电解液污染的问题；并且面面密封有效减小摩擦力，使注液嘴3的使用寿命有效延长，降低生产及维护的成本。
根据本申请的一些实施例，可选地，参照附图4至附图7，凸部34为锥状部，锥状部的外壁用于被第二孔段22的锥状内壁包覆，以使注液嘴3插入注液孔2时，锥状部插入具有第二孔段22的注液孔2。
通过将凸部34设置为锥状部，使得凸部34向电芯顶盖1的注液孔2插入时，凸部34能够准确插入至注液孔2的第二孔段22内被第二孔段22包覆，并且锥状部的下端尺寸较小能够将注液通道32准确的连通于注液孔2，对注液嘴3的插入起到导向且提高介入精度的作用。
根据本申请的一些实施例，可选地，参照附图5和附图6，第二压合面31为水平表面；或者第二压合面31为朝向凸部34突出的弧状面。
通过将第二压合面31设置成水平表面或弧状表面来配合第一压合面24，不仅能够实现面面密封，还能够增强接触面的多样化设计，进而增强其实现性、通用性以及适用范围；具体的，当第二压合面31为水平面时，则第一压合面24和第二压合面31的接触面积全部为有效面积，增大接触面积的前提下能够轻易实现与第一压合面24的面面压合密封，在垂直第一压合面24的方向上形成严密的压合，有效应解决在注液过程中出现密封失效的现象，从而防止电解液泄露；当第二压合面31为突出的弧状面时，当注液嘴3受外力压向注液孔2时，弧状面也能够压缩形成平面与第一压合面24相贴合，在靠近注液通道32的部分受到的压力越大，能够阻拦电解液的外溢，弧状面对应的压强呈梯度分布，由注液通道32向外逐渐减小，同样能够起到防止密封失效的作用。需要说明的是：弧状面可以为1/8圆弧面。
根据本申请的一些实施例，可选地，参照附图7，第二压合面31包括水平表面，且水平表面上设有朝向凸部34突出且连续的凸起35。
本实施例中第二压合面31不仅仅可以设置成单纯的水平面或弧状面，还可以在水平面上设置朝向凸部34即朝向注液孔2的凸起35，凸起35绕基体33的轴向连续设置，以使得在注液嘴3受外力压向注液孔2时，凸起35与第一压合面24之间能够通过较大的压力进行密封并阻拦电解液的泄露，同时凸起35在被压时也会压缩使得其所在的水平表面尽可能的与第一压合面24进行贴合实现面面密封。当然，凸起35也可以是在水平表面上设置的多个间隔且同心的圆环形成的同心环凸起，以实现多道密封，这样的设置下，即使电解液有些许的泄露，相邻凸起35之间的空间也能够起到容纳及阻拦电解液继续外溢的作用，保证电解液不会溢出至第三孔段23的外台阶处，进而保证了密封钉的最终密封。
根据本申请的一些实施例，可选地，参照附图4至附图7，第二压合面31沿第二方向b的投影面积为第二面积；第二面积小于第二压合面31与第一压合面24抵接时第一压合面24的面积；第二方向b为基体33的轴向。
通过将第二压合面31沿第二方向b的投影面积设置为小于与其接触时第一压合面24的面积，从而使得第一压合面24延长了第二孔段22孔壁与第三孔段23孔壁之间沿着注液孔2径向方向上的距离，即参考附图4至附图7，第一压合面24在图中左右方向的尺寸大于第二压合面31在图中左右方向的尺寸或者说第一压合面24的宽度大于第二压合面31的宽度，从而延长了电解液由第一孔段21向外的外溢路径，即使有电解液泄露，也不会流至第一压合面24与第三孔段23的接壤处、第三孔段23以及其外侧即外台阶处，从而防止电解液泄露时流至注液孔2的第三孔段23处污染注液孔2外围，影响后续与密封钉的焊接。
根据本申请的一些实施例，可选地，基体33与凸部34为一体成型的弹性结构。
本实施例中可以将基体33与凸部34设置为一体成型的弹性结构，例如：橡胶材料；通过一体成型使得基体33与凸部34之间的强度可靠、密封程度可靠，在注液嘴3的基体33与电芯顶盖1的注液孔2配合注液过程影响较小，避免出现不必要的泄漏点。
根据一些实施例，参考附图4至附图8，本申请提供了一种电芯顶盖1以及与其相配合使用的注液嘴3；电芯顶盖2包括顶盖本体11，顶盖本体11上设有注液孔2；注液孔2包括沿顶盖本体11厚度方向依次设置且相连通的第一孔段21、第二孔段22以及第三孔段23，第一孔段21相对第二孔段22靠近电芯内；第二孔段22远离第一孔段21的一端与第三孔段23之间形成台阶面即第一压合面24，第二孔段22的内壁为锥状内壁。注液嘴3包括基体33，基体33的一端设有锥状的凸部34，基体33沿其轴向设有贯穿基体33和凸部34的注液通道32；凸部34所在的基体33的端面形成第二压合面31；其中，当锥状凸部34插入锥状第二孔段22时，注液通道32与注液孔2的第一孔段21相连通，第二孔段22包覆凸部34外壁，第二压合面31与第一压合面24紧密抵接，注液嘴3能够通过具有注液孔2和第一压合面24的电芯顶盖1向电芯20注液。
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)
- 一种电芯顶盖，其特征在于，包括：顶盖本体，所述顶盖本体上设有注液孔；所述注液孔包括沿所述顶盖本体厚度方向依次设置且相连通的第一孔段、第二孔段以及第三孔段，所述第一孔段相对所述第二孔段靠近电芯内；所述第二孔段远离所述第一孔段的一端与所述第三孔段之间形成台阶面，所述台阶面为第一压合面；其中，所述第一压合面用于与第二压合面抵接，所述注液孔用于与注液通道连通，以通过具有所述第二压合面和所述注液通道的注液嘴插入所述注液孔向所述电芯注液。
- 如权利要求1所述的电芯顶盖，其特征在于：所述第二孔段的内壁为锥状内壁，所述锥状内壁用于包覆锥状部的外壁，以通过具有所述锥状部的注液嘴向所述电芯注液。
- 如权利要求1至2任一所述的电芯顶盖，其特征在于：所述第一压合面为水平表面；或者，所述第一压合面设有凹陷区域。
- 如权利要求1至3任一所述的电芯顶盖，其特征在于：所述第一压合面沿第一方向的投影面积为第一面积；其中，所述第一面积大于所述第一压合面与所述第二压合面抵接时所述第一压合面与所述第二压合面接触的面积；所述第一方向为所述顶盖本体的厚度方向。
- 如权利要求1至4任一所述的电芯顶盖，其特征在于：所述第一孔段的直径为第一直径；其中，所述第一直径大于所述注液通道的直径。
- 如权利要求1至5任一所述的电芯顶盖，其特征在于：所述第三孔段的内壁为锥状内壁；或者所述第三孔段的内壁为筒状内壁。
- 一种电芯，其特征在于，其包括：权利要求1-6任一所述的电芯顶盖。
- 一种电池，其特征在于，其包括：权利要求7所述的电芯。
- 一种用电设备，其特征在于，其包括：权利要求8所述的电池。
- 如权利要求9所述的用电设备，其特征在于，所述用电设备为手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、新能源汽车、轮船、航天器中的一种。
- 一种注液嘴，其特征在于，其包括：基体，所述基体的一端设有凸部，所述基体沿其轴向设有贯穿所述基体和所述凸部的注液通道；所述凸部所在的所述基体的端面形成第二压合面；其中，所述第二压合面用于与第一压合面抵接，所述注液通道用于与注液孔连通，以使所述注液嘴插入具有所述注液孔和所述第一压合面的电芯顶盖向电芯注液。
- 如权利要求11所述的注液嘴，其特征在于：所述凸部为锥状部，所述锥状部的外壁用于被第二孔段的锥状内壁包覆，以使所述注液嘴插入所述注液孔时，所述锥状部插入具有所述第二孔段的注液孔；或者，所述凸部为圆柱状。
- 如权利要求11至12任一所述的注液嘴，其特征在于：所述第二压合面为水平表面；或者所述第二压合面为朝向所述凸部突出的弧状面。
- 如权利要求11至12任一所述的注液嘴，其特征在于：所述第二压合面包括水平表面，且水平表面上设有朝向所述凸部突出且连续的凸起。
- 如权利要求14所述的注液嘴，其特征在于，所述水平表面设有同心环凸起。
- 如权利要求11至15任一所述的注液嘴，其特征在于：所述第二压合面沿第二方向的投影面积为第二面积；所述第二面积小于所述第二压合面与所述第一压合面抵接时所述第一压合面的面积；所述第二方向为所述基体的轴向。
- 如权利要求11至16任一所述的注液嘴，其特征在于：所述基体与所述凸部为一体成型的弹性结构。
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| JP2017152322A (ja) * | 2016-02-26 | 2017-08-31 | プライムアースＥｖエナジー株式会社 | 二次電池 |
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| JP2017220353A (ja) * | 2016-06-07 | 2017-12-14 | プライムアースＥｖエナジー株式会社 | 二次電池 |
| CN208336288U (zh) * | 2018-05-11 | 2019-01-04 | 江西中汽瑞华新能源科技有限公司 | 一种电池顶盖组件 |
| CN211455833U (zh) * | 2020-02-24 | 2020-09-08 | 中航锂电技术研究院有限公司 | 一种电池注液装置及其注液嘴 |
| CN216529273U (zh) * | 2021-10-08 | 2022-05-13 | 宁德三行技研工贸有限公司 | 一种防积液的注液嘴 |
| CN217134503U (zh) * | 2022-02-23 | 2022-08-05 | 宁德时代新能源科技股份有限公司 | 电芯顶盖、电芯、电池、用电设备以及注液嘴 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017152322A (ja) * | 2016-02-26 | 2017-08-31 | プライムアースＥｖエナジー株式会社 | 二次電池 |
| JP2017212044A (ja) * | 2016-05-23 | 2017-11-30 | 株式会社Ｇｓユアサ | 蓄電素子、及び蓄電素子の製造方法 |
| JP2017220353A (ja) * | 2016-06-07 | 2017-12-14 | プライムアースＥｖエナジー株式会社 | 二次電池 |
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| CN208336288U (zh) * | 2018-05-11 | 2019-01-04 | 江西中汽瑞华新能源科技有限公司 | 一种电池顶盖组件 |
| CN211455833U (zh) * | 2020-02-24 | 2020-09-08 | 中航锂电技术研究院有限公司 | 一种电池注液装置及其注液嘴 |
| CN216529273U (zh) * | 2021-10-08 | 2022-05-13 | 宁德三行技研工贸有限公司 | 一种防积液的注液嘴 |
| CN217134503U (zh) * | 2022-02-23 | 2022-08-05 | 宁德时代新能源科技股份有限公司 | 电芯顶盖、电芯、电池、用电设备以及注液嘴 |
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