WO2023131031A1 - Élément de batterie, batterie et dispositif électrique - Google Patents

Élément de batterie, batterie et dispositif électrique Download PDF

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Publication number
WO2023131031A1
WO2023131031A1 PCT/CN2022/142899 CN2022142899W WO2023131031A1 WO 2023131031 A1 WO2023131031 A1 WO 2023131031A1 CN 2022142899 W CN2022142899 W CN 2022142899W WO 2023131031 A1 WO2023131031 A1 WO 2023131031A1
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WO
WIPO (PCT)
Prior art keywords
battery cell
liquid injection
battery
recess
sealing
Prior art date
Application number
PCT/CN2022/142899
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English (en)
Chinese (zh)
Inventor
连登伟
Original Assignee
宁德时代新能源科技股份有限公司
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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
Publication of WO2023131031A1 publication Critical patent/WO2023131031A1/fr

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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
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • H01M50/645—Plugs
    • 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 new energy technology, in particular to a battery cell, a battery and an electrical device.
  • the battery forms a sealed space through the cover of the end cover and the casing, and the electrolyte is provided in the sealed space to provide a charging and discharging environment.
  • the electrolyte is consumed and cannot be replenished, resulting in a decrease in the performance of the battery and a serious decline in life.
  • the present application provides a battery cell, a battery and an electrical device, so as to be able to replenish electrolyte to the battery cell, improve the performance of the battery cell, and prolong the service life of the battery cell.
  • a battery cell comprising: a housing with an opening; an end cover disposed on the opening, a first recess is formed on the side of the end cover away from the housing, and the first recess is The thickness of the bottom wall is smaller than the thickness of the surrounding end cover; a liquid injection structure is arranged on the bottom wall of the first recessed part, and the liquid injection structure is from the surface of the bottom wall of the first recessed part far away from the shell toward the inside of the shell It is formed by piercing the bottom wall; the first recessed part and the liquid injection structure form a liquid injection path; the sealing part seals the liquid injection path.
  • a first recess is provided on the surface of the end cap away from the housing, so that the bottom wall of the first recess
  • the thickness of the bottom wall is smaller than the thickness of the surrounding end cover.
  • the section of the liquid injection structure is arranged in an inverted "eight" shape on a plane perpendicular to the end cap.
  • the liquid injection structure can control the liquid injection path
  • the electrolyte injected into the battery acts as a guide.
  • the sealing part is disposed in the first concave part and is sealingly connected with the first concave part.
  • the sealing part is disposed in the liquid injection structure and is in sealing connection with the liquid injection structure.
  • a second recess is formed on the side of the end cover away from the housing, the first recess is formed on the bottom wall of the second recess, and the sealing portion is disposed in the second recess.
  • the first recessed portion is formed on the bottom wall of the second recessed portion, and the sealing portion is arranged in the second recessed portion, so that the sealing portion and the second recessed portion
  • the sealing contact is formed between the side wall and the bottom wall.
  • an edge of the sealing portion is welded to the second recess.
  • a groove is provided at an end of the sealing portion away from the housing, and the groove is used for releasing stress generated by welding.
  • the parts to be welded are first melted and then solidified and welded.
  • the molten structure is limited by the unmelted structure during the solidification process and will generate welding stress.
  • the edge of the sealing part By setting a groove at the end of the sealing part away from the shell, the edge of the sealing part During welding, a part of the molten structure flows and fills between the sealing portion and the side wall of the second concave portion, and the other part flows in the groove, so that the molten structure at the edge of the sealing portion will not be restricted by other structures during the solidification process, thereby Ensure that the welding stress can be released, and enhance the structural stability of the sealing part after welding.
  • the sealing part is sealingly connected with the second recessed part through a sealant.
  • a sealant can be injected into the gap between the edge of the sealing part and the side wall of the second recessed part, and after the sealant is filled in the gap and dried and cured, the sealing part is sealed and fixed on the In the second recessed portion, the sealing performance inside the battery cell is ensured.
  • a battery including the battery cell in any one of the above-mentioned embodiments.
  • an electric device including the above-mentioned battery, and the battery is used to provide power.
  • FIG. 1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application.
  • Fig. 2 is a schematic diagram of the explosive structure of the battery provided in the embodiment of the present application.
  • Fig. 3 is a schematic diagram of an exploded structure of a battery cell provided in an embodiment of the present application.
  • FIG. 4 is a schematic cross-sectional structural view of a battery cell provided in an embodiment of the present application.
  • FIG. 5 is a schematic cross-sectional structural view of an end cap in a battery cell provided by another embodiment of the present application.
  • FIG. 6 is a schematic cross-sectional structural view of an end cap in a battery cell provided by another embodiment of the present application.
  • Fig. 7 is a schematic cross-sectional structural view of a battery cell provided by another embodiment of the present application before welding the sealing part on the end cover and the second concave part;
  • FIG. 8 is a structural schematic view of the sealing part of the end cover in FIG. 7 after welding with the second recessed part.
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to more than two groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • Batteries are not only used in energy storage power systems such as hydropower, firepower, wind power 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 battery application fields, its market demand is also constantly expanding.
  • the lithium batteries in order to ensure a good charging and discharging environment inside the battery cell, it is necessary to ensure good sealing when the shell and the end cover are assembled, so that a sealed space is formed between the shell and the end cover and the The electrode assembly and electrolyte are arranged in the sealed space to realize the charging and discharging of the battery cells.
  • the lithium ions on the electrode assembly react with the electrolyte, and as the number of reactions increases, the electrolyte is consumed, and the performance of the battery cell decreases accordingly, and the life expectancy correspondingly occurs attenuation.
  • the present application proposes a battery cell.
  • the thickness of the bottom wall of the first depression is smaller than the thickness of the surrounding end cover, so that the first
  • the surface of the bottom wall of the recessed portion away from the casing is pierced toward the inside of the casing to form the bottom wall to form a liquid injection structure, and the liquid injection structure formed by piercing will not produce metal shavings, thereby preventing impurities from falling into the battery cell.
  • the first recessed part and the liquid injection structure together form a liquid injection path to realize the injection and replenishment of the electrolyte solution inside the battery cell.
  • the liquid injection path is sealed by the sealing part to ensure that after liquid replenishment, the inside of the battery cell still has a good sealing environment, providing a reliable environment for the charging and discharging of the battery cell.
  • the solution proposed in this application is not only applicable to the liquid injection process of battery cells that are produced and assembled for the first time.
  • a recessed part and a liquid injection structure realize secondary replenishment of the battery cells to improve the performance of the battery cells and prolong the service life of the battery cells.
  • the batteries disclosed in the embodiments of the present application can be used, but not limited to, in electric devices such as vehicles, ships or aircrafts.
  • 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, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc.
  • 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 for description.
  • 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 a schematic diagram of an exploded structure of a battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a case 10 and battery cells 20 housed in the case 10 .
  • the box body 10 is used to provide accommodating space for the battery cells 20 , and the box body 10 may adopt various structures.
  • the box body 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, the first part 11 and the second part 12 jointly define a of accommodation space.
  • the second part 12 can be a hollow structure with one end open, the first part 11 can be a plate-shaped structure, and the first part 11 covers the opening side of the second part 12, so that the first part 11 and the second part 12 jointly define an accommodation space ;
  • the first part 11 and the second part 12 can also be hollow structures with one side opening, and the opening side of the first part 11 is covered by the opening side of the second part 12 .
  • the box body 10 formed by the first part 11 and the second part 12 can be in various shapes, such as a cylinder, a cuboid and the like.
  • the battery 100 there may be multiple battery cells 20 , and the multiple battery cells 20 may be connected in series, in parallel or in parallel.
  • the mixed connection means that the multiple battery cells 20 are connected in series and in parallel.
  • a plurality of battery cells 20 can be directly connected in series, in parallel or mixed together, and then the whole composed of a plurality of battery cells 20 is housed in the box 10; of course, the battery 100 can also be a plurality of battery cells 20
  • the battery modules are firstly connected in series or parallel or in combination, and then multiple battery modules are connected in series or in parallel or in combination to form a whole, which is accommodated in the case 10 .
  • the battery 100 may also include other structures, for example, the battery 100 may also include a bus component for realizing electrical connection between multiple battery cells 20 .
  • each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but not limited thereto.
  • the battery cell 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 a battery cell 20 in a battery 100 provided in some embodiments of the present application.
  • the battery cell 20 refers to the smallest unit constituting a battery.
  • the battery cell 20 includes an end cover 21 , a casing 22 , an electrode assembly 23 and other functional components.
  • the end cap 21 refers to a component that covers the opening of the casing 22 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap 21 can be adapted to the shape of the housing 22 to fit the housing 22 .
  • the end cap 21 can be made of a material (such as aluminum alloy) with a certain hardness and strength, so that the end cap 21 is not easy to deform when being squeezed and collided, so that the battery cell 20 can have more With high structural strength, safety performance can also be improved.
  • Functional components such as electrode terminals 21 a may be provided on the end cap 21 .
  • the electrode terminal 21 a can be used to be electrically connected with the electrode assembly 23 for outputting or inputting electric energy of the battery cell 20 .
  • the end cover 21 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value.
  • the material of the end cap 21 can also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.
  • an insulator can be provided inside the end cover 21 , and the insulator can be used to isolate the electrical connection components in the housing 22 from the end cover 21 to reduce the risk of short circuit.
  • the insulation may be plastic, rubber, or the like.
  • the casing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20 , wherein the formed internal environment can be used to accommodate the electrode assembly 23 , electrolyte and other components.
  • the housing 22 and the end cover 21 can be independent components, and an opening can be provided on the housing 22 , and the internal environment of the battery cell 20 can be formed by making the end cover 21 cover the opening at the opening. Without limitation, the end cover 21 and the housing 22 may also be integrated.
  • the housing 22 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the casing 22 can be determined according to the specific shape and size of the electrode assembly 23 .
  • the housing 22 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 23 is a part where the electrochemical reaction occurs in the battery cell 20 .
  • One or more electrode assemblies 23 may be contained within the case 22 .
  • the electrode assembly 23 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 electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without the active material respectively constitute the tab 23a.
  • 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 23a are connected to the electrode terminals to form a current loop.
  • a battery cell is provided, please refer to FIG. 4 for details, which shows a cross-sectional structure of a battery cell 20 provided by an embodiment of the present application.
  • the battery cell 20 includes an end cap 21 , a case 22 and a sealing portion 24 .
  • the housing 22 has an opening 221, and the end cover 21 is covered at the opening 221.
  • a first recess 211 is formed on the side of the end cover 21 away from the housing 22. The thickness of the bottom wall of the first recess 211 is smaller than that of all the surrounding end covers 21. thickness of.
  • a liquid injection structure 212 is provided on the bottom wall of the first recessed portion 211, and the liquid injection structure 212 pierces the bottom wall from the surface of the bottom wall of the first recessed portion 211 that is far away from the housing 22 toward the interior of the housing 22. Formed, the first recessed portion 211 and the liquid injection structure 212 form a liquid injection path. The sealing portion 24 seals the liquid injection path.
  • an end cap 21 is provided at the opening 221 of the housing 22 of the battery cell 20 .
  • a liquid injection path needs to be formed on the end cap 21 .
  • the liquid injection path is set The location of the battery can be selected according to the specific structure of the battery cell.
  • the end cover 21 is provided with structures such as explosion-proof valves.
  • the liquid injection path can be set at a position away from structures such as explosion-proof valves. In some embodiments, it can be The liquid injection path is arranged on one side edge of the end cap, which is not limited in this embodiment of the present application.
  • a first recessed portion 211 is formed on the side of the end cover 21 away from the housing, the thickness of the bottom wall of the first recessed portion 211 is smaller than the thickness of the surrounding end caps, and the first recessed portion 211 does not go through the end.
  • the first recessed part 211 is formed on the end cover by cutting tool processing. Since the first recessed part does not penetrate the end cover 21, the debris formed during the cutting process will not dropped into the inside of the battery cell 20 .
  • the liquid injection structure 212 is formed by piercing the bottom wall of the first recessed portion 211 from the surface away from the housing 22 towards the inside of the housing 22 .
  • the thickness of the bottom wall of the first recessed portion 211 on the end cap 12 becomes relatively thin, in order to avoid chipping when the liquid injection structure 212 is continuously formed by cutting Dropped into the housing, in the embodiment of the present application, the liquid injection structure 211 is formed by piercing the bottom wall of the first recess 211 toward the inside of the housing 22 with a needle or other sharp tools.
  • the bottom wall of the first recessed part 211 When the bottom wall of the first recessed part 211 is pierced by a puncture needle or other sharp objects, the bottom wall of the first recessed part 211 will bend toward the inside of the housing 22 along with the piercing tool to form a liquid injection structure 211. Among them, due to the characteristics of the material of the end cap 21 , the pierced part of the bottom wall will not be cut off and fall into the housing 22 , but will continue to be connected with the bottom wall of the first recess 211 . In this way, during the process of piercing the end cap 21 , it is avoided that debris falls into the casing, causing impurities to be mixed into the electrolyte.
  • the liquid injection structure 212 formed by piercing can be in various shapes, such as: circular, square or elliptical, etc., which are not limited here.
  • first recess 211 By forming a first recess 211 on the end cap 21, and then forming a liquid injection structure on the bottom wall of the first recess 211 in a piercing manner, the first recess 211 and the liquid injection structure 212 are jointly formed on the end cap 21.
  • a liquid injection path is formed, through which the battery cells can be conveniently injected with liquid. After the liquid injection is completed, the liquid injection path is sealed by the sealing part 24 , so that the service life of the battery cells can be extended.
  • the embodiment of the present application adopts the
  • the cover 21 is provided with a first recessed portion 211 away from the surface of the housing 22, so that the thickness of the bottom wall of the first recessed portion 211 is smaller than the thickness of the surrounding end cover 21.
  • the bottom wall structure bends inward to form a liquid injection structure 212, so that the components of the end cover 21 will not be cut or worn away, thereby effectively avoiding the occurrence of leakage during the opening of the liquid injection path. Impurities fall into the casing 22 and affect the environment of the internal electrolyte.
  • the liquid injection path is sealed by setting the sealing part 24 to ensure that the inside of the battery cell 20 can still be well sealed after liquid injection.
  • the section of the liquid injection structure 212 is arranged in an inverted "eight" shape on a plane perpendicular to the end cap 21 .
  • the liquid injection structure 212 is formed by piercing the bottom wall of the first recessed portion 211 so that the bottom wall of the first recessed portion 211 is bent inwardly of the housing 22, and the liquid injection structure 212 is formed on a plane perpendicular to the end cap 21.
  • the upper section is in the shape of an inverted "eight".
  • the cross-section of the inverted "eight"-shaped liquid injection structure in the horizontal direction can be a circle, a direction or an ellipse, which is not limited here, and can be in any shape, as long as it can facilitate the passage of the electrolyte and stimulate It is sufficient that the material at the bend formed after wearing does not fall off easily.
  • the end of the piercing tool needs to have a certain radian.
  • the bottom wall of the first recess 211 can be deformed slowly when piercing, which is not easy Cause the bottom wall material to fall, can play a better effect of preventing debris from falling.
  • the first recessed part 211 and the liquid injection structure 212 together form a funnel-shaped liquid injection path, and the liquid injection structure 212 It can guide the electrolyte solution injected in the liquid injection path.
  • the sealing portion 24 is disposed in the first recessed portion 211 and is sealingly connected with the first recessed portion 211 .
  • the sealing part 24 can be a metal structure covered in the first recessed part 211, and by welding the edge of the sealing part 24 to the inner wall of the first recessed part 211, the liquid injection path and Sealing of the inside of the battery cell 20 .
  • the sealing part 24 can also be an elastic plastic structure, and the sealing connection with the first recessed part 211 can be realized through sealant or interference fit.
  • FIG. 5 shows the structure of the sealing part 24 in the battery cell 20 provided by another embodiment of the present application.
  • the sealing part 24 may also be disposed in the liquid injection structure 212 and be sealed with the liquid injection structure 212 .
  • the liquid injection path is sealed by sealing the sealing portion 24 on the inner wall of the liquid injection structure 212 .
  • FIG. 6 shows the structure of the sealing part 24 in the battery cell 20 provided by another embodiment of the present application.
  • the sealing part 24 can also be provided on the first recessed part 211 and the liquid injection structure 212 simultaneously.
  • the cross-section of the sealing part 24 in a "T" shape, the sealing of the first recessed part 211 and the liquid injection structure 212 can be realized at the same time, and the sealing performance can be further improved.
  • the sealing part 24 in the first recessed part 211 and/or the liquid injection structure 212 By sealing the sealing part 24 in the first recessed part 211 and/or the liquid injection structure 212 , the sealing of the inside of the battery cell 20 after the electrolyte solution is injected is realized, ensuring the stability of the subsequent operation of the battery cell 20 .
  • FIG. 7 shows the structure of the end cover 21 in the battery cell 20 provided by another embodiment of the present application.
  • a second recessed portion 213 is formed on the side of the end cover 21 away from the housing 22, the first recessed portion 211 is formed on the bottom wall of the second recessed portion 213, and the sealing portion 24 is disposed on the second recessed portion 213.
  • the two recesses 213 Inside the two recesses 213 .
  • the first recessed part 211 is formed on the bottom wall of the second recessed part 213, that is, the second recess Sleeved on the first recessed part, when the first recessed part 211 and the second recessed part 213 are cylindrical, the diameter of the second recessed part 213 is greater than the diameter of the first recessed part 211 .
  • Cross-sections of the second recessed portion 213 and the first recessed portion 211 form a trapezoidal structure. In this way, a step is formed between the second recessed part 211 and the first recessed part 213 , and through the step, the sealing part 24 can be better arranged, and the liquid injection path can be better sealed.
  • the sealing part 24 is arranged in the second recessed part 213, so that the sealing contact is formed between the sealing part 24 and the side wall and the bottom wall of the second recessed part 213, compared with the sealing part 24 arranged in the first In terms of the recessed portion 211 or the liquid injection structure 212, the sealing contact area is increased, thereby further improving the sealing performance.
  • the edge of the sealing part 24 is welded to the second concave part 213 .
  • the welding method can melt the edge of the sealing part 24 and then weld and fix it with the side wall of the second recessed part 213 , so as to achieve a good sealing effect.
  • the sealing of the liquid injection path by the sealing portion 24 is realized, thereby ensuring the tightness of the inner space of the battery cell 20 .
  • the first recessed part 211 is formed in the bottom wall of the second recessed part 213, thus when the structure melting of the edge of the sealing part 214 flows into the gap between the second recessed part 213, the melted structure flowing in is in the second recessed part 213
  • the bottom wall of the sealing portion 214 is limited and stopped, which can effectively prevent the molten structure of the edge of the sealing portion 214 from flowing into the battery cell 20 and affecting the electrolyte.
  • a groove 241 is provided at the end of the sealing portion 24 facing away from the housing 22 , and the groove 241 is used to release the stress generated by welding.
  • FIG. 8 shows the structure after the sealing part 24 and the second recessed part 213 shown in FIG. 7 are welded.
  • the sealing part 24 is in sealing connection with the second recessed part 213 through a sealant.
  • a sealant can be injected into the gap between the edge of the sealing part 24 and the side wall of the second recessed part 213, and the sealant is filled in the gap and dried and cured. Afterwards, the sealing part 24 is sealed and fixed in the second recessed part 213 to ensure the sealing performance inside the battery cell 20 .
  • a battery including the battery cell 20 in any of the above embodiments.
  • the battery can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.
  • an electric device including the above-mentioned battery, and the battery is used to provide power.
  • Electric devices can be but not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc.
  • 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.

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

Abstract

La présente invention se rapporte au domaine technique des nouvelles énergies, en particulier à un élément de batterie, à une batterie et à un dispositif électrique. L'élément de batterie comprend : un boîtier comportant une ouverture ; un couvercle d'extrémité, qui recouvre l'ouverture, un premier évidement étant formé dans le côté du couvercle d'extrémité à l'opposé du compartiment, l'épaisseur d'une paroi inférieure du premier évidement étant inférieure à celle du couvercle d'extrémité environnant, une structure d'injection d'électrolyte étant disposée sur la paroi inférieure du premier évidement, et étant formée par perçage de la paroi inférieure vers l'intérieur du compartiment à partir de la surface de la paroi inférieure du premier évidement à l'opposé du compartiment, et le premier évidement et la structure d'injection d'électrolyte formant un trajet d'injection d'électrolyte ; et une partie d'étanchéité pour sceller le trajet d'injection d'électrolyte. Selon la présente invention, au moyen du mode, un électrolyte peut être fourni à l'élément de batterie, ce qui permet d'améliorer les performances de l'élément de batterie et de prolonger la durée de vie de l'élément de batterie.
PCT/CN2022/142899 2022-01-07 2022-12-28 Élément de batterie, batterie et dispositif électrique WO2023131031A1 (fr)

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CN202220038570.X 2022-01-07
CN202220038570.XU CN216903150U (zh) 2022-01-07 2022-01-07 一种电池单体、电池及用电装置

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117134044A (zh) * 2023-08-23 2023-11-28 东阳利维能新能源科技有限公司 一种锂离子电池结构

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN216903150U (zh) * 2022-01-07 2022-07-05 宁德时代新能源科技股份有限公司 一种电池单体、电池及用电装置

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