WO2024045058A1 - 电池单体、电池及用电设备 - Google Patents

电池单体、电池及用电设备 Download PDF

Info

Publication number
WO2024045058A1
WO2024045058A1 PCT/CN2022/116250 CN2022116250W WO2024045058A1 WO 2024045058 A1 WO2024045058 A1 WO 2024045058A1 CN 2022116250 W CN2022116250 W CN 2022116250W WO 2024045058 A1 WO2024045058 A1 WO 2024045058A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
terminal
electrode
housing
current collecting
Prior art date
Application number
PCT/CN2022/116250
Other languages
English (en)
French (fr)
Inventor
许虎
金海族
郭继鹏
牛少军
赵丰刚
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to PCT/CN2022/116250 priority Critical patent/WO2024045058A1/zh
Publication of WO2024045058A1 publication Critical patent/WO2024045058A1/zh

Links

Images

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
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of batteries, specifically, to a battery cell, a battery and electrical equipment.
  • Batteries are widely used in the field of new energy, such as electric vehicles and new energy vehicles. New energy vehicles and electric vehicles have become a new development trend in the automobile industry. The development of battery technology must consider multiple design factors at the same time, such as energy density, discharge capacity, charge and discharge rate and other performance parameters. In addition, battery life also needs to be considered. However, current batteries have a shorter lifespan.
  • the purpose of the embodiments of the present application is to provide a battery cell, a battery and an electrical device, which is intended to improve the problem of short battery life in related technologies.
  • inventions of the present application provide a battery cell.
  • the battery cell includes an electrode assembly, a casing, an electrode terminal and a current collecting member.
  • the electrode assembly has tabs; the casing is used to accommodate the Electrode assembly; along the first direction, the electrode terminal is provided at one end of the housing; the current collecting member is provided with a hollow area, and the hollow area divides the current collecting member into two sides located on both sides of the hollow area A first connection area and a second connection area, the first connection area is connected to the tab, and the second connection area is connected to the electrode terminal.
  • a hollow area is provided on the current collecting member of the battery cell.
  • the hollow area divides the current collecting member into a first connection area and a second connection area.
  • the first connection area and the second connection area are respectively connected with the poles. Connect the ears to the electrode terminals.
  • the existence of the hollow area enables the second connection area to deform relative to the first connection area, making it difficult for the stress to be transferred to the first connection area, causing the first connection area to move under stress, and making it difficult for the second connection area to move.
  • the first connection area is separated from the tab, which is beneficial to extending the life of the battery cell.
  • the second connection area is deformed relative to the first connection area, making it difficult for the first connection area to separate from the tab, thereby improving the battery cell quality. life span.
  • the hollow area includes two spaced holes and slits that penetrate both surfaces of the current collecting member in the thickness direction, and the current collecting member is located at The portion between the two aperture portions forms the second connection area.
  • the second connection area between the two slits is prone to deformation.
  • the stress It is difficult to transmit to the first connection area, it is not easy to cause the first connection area to move due to stress, and it is not easy to separate the first connection area from the tab, which is beneficial to extending the life of the battery cell.
  • the slit portion is easy to form, which can reduce the production cost of the current collecting member.
  • the slit portion is an arc-shaped slit.
  • arc-shaped slits are used to make the second connection area more susceptible to deformation.
  • the openings of the two slit parts are arranged opposite to each other.
  • arranging the openings of the two slit parts opposite to each other is beneficial to dividing the first connection area into a larger area and increasing the connection area between the first connection area and the tab, even if the stress is transmitted to the first connection area Since the first connection area and the tab have a large connection area, it is not easy to separate the first connection area and the tab.
  • the current collecting member is a flat structure.
  • the current collecting member with a flat plate structure occupies less space for the battery cells, which is beneficial to increasing the energy density of the battery cells.
  • the battery cell includes two electrode terminals.
  • the two electrode terminals have opposite polarities and are respectively provided at two opposite ends of the housing along the first direction. , each of the electrode terminals is connected to the corresponding tab through one of the current collecting members.
  • one electrode terminal serves as the positive electrode of the battery cell
  • the other electrode terminal serves as the negative electrode of the battery cell.
  • the battery cell does not need to use the casing as the negative electrode of the battery cell, and it is less likely to cause corrosion of the casing and less likely to cause a short circuit between two adjacent battery cells.
  • the housing includes a housing and an end cover, the housing has an opening at one end along the first direction, the end cover closes the opening, and an An electrode terminal is provided on the housing, and the other electrode terminal is provided on the end cover.
  • the housing includes a shell and two end caps.
  • the shell has openings at both ends along the first direction, and the two end caps close both ends. There are two openings, and two electrode terminals are respectively provided on the two end caps in one-to-one correspondence.
  • the two electrode terminals are arranged on the two end caps in one-to-one correspondence, which facilitates production and is beneficial to reducing production costs.
  • the height of the portion of the electrode terminal protruding from the housing is H, and the length of the housing is L, satisfying: H/L ⁇ 0.02.
  • the height of the portion of the electrode terminal protruding from the housing along the first direction does not exceed 0.02 times the length of the housing along the first direction. In this way, the height of the portion of the electrode terminal protruding from the casing along the first direction is smaller, occupying less space, which is beneficial to improving the energy density of the battery. If H/L>0.02, the height of the portion of the electrode terminal protruding from the casing along the first direction is relatively large, occupying a large space, which is not conducive to improving the energy density of the battery.
  • H/L 0.15
  • the height of the portion of the electrode terminal protruding from the housing along the first direction does not exceed 0.015 times the length of the housing along the first direction. In this way, the height of the portion of the electrode terminal protruding from the casing along the first direction is smaller, occupying less space, which is beneficial to improving the energy density of the battery.
  • the housing is cylindrical, the outer diameter of the housing is D, and the length of the housing along the first direction is L, satisfying: L/D ⁇ 2 .
  • the casing is cylindrical
  • the battery cells are cylindrical battery cells. Limiting the ratio of the length of the housing along the first direction to the outer diameter of the housing to be greater than or equal to 2 makes the internal space of the battery cell easier to utilize.
  • the electrode terminal includes a first terminal part and a second terminal part made of different materials, the first terminal part is connected to the second terminal part, and the first terminal part is connected to the second terminal part.
  • the terminal part is connected to the current collecting member, and the second terminal part is mounted on the housing.
  • the materials of the tabs and the bus components are different, and the same materials are easier to weld. Therefore, the material of the current collecting member can be set to be the same as the material of the pole tab, so as to facilitate welding of the current collecting member and the pole tab.
  • the material of the first terminal part is set to be the same as the material of the current collecting member, so as to facilitate welding of the first terminal part and the current collecting member.
  • the material of the second terminal part is set to be the same as the material of the bus component to facilitate welding of the second terminal part and the bus component.
  • the material of the first terminal part is copper, and the material of the second terminal part is aluminum.
  • the material of the tab is copper, so the material of the first terminal part is also set to be copper.
  • the material of the bus member is aluminum, so the material of the second terminal portion is also made of aluminum.
  • the second terminal part is surrounding the outside of the first terminal part.
  • the first terminal portion is located in the middle of the electrode terminal to facilitate welding with the current collecting member.
  • the second terminal part is arranged around the outside of the first terminal part to facilitate installation on the housing and welding with the bus component.
  • the first terminal part forms a cavity with an open end.
  • the weight of the first terminal part can be reduced, which is beneficial to reducing the weight of the battery cell.
  • the electrode terminal includes a third terminal part, the third terminal part is connected to the second terminal part and closes the opening, and the third terminal part is To connect with the busbar.
  • the third terminal part can be connected to the bus component, thereby increasing the connection area between the electrode terminal and the bus component, making the connection between the electrode terminal and the bus component more convenient.
  • the third terminal portion closes the opening, which can prevent impurities outside the battery cells from gathering in the cavity.
  • the first terminal part and the second terminal part are stacked along the first direction.
  • the first terminal part and the second terminal part are stacked, so that the first terminal part and the current collecting member have a larger connection area, and at the same time, the second terminal part and the current collecting member also have a large connection area.
  • a cavity is formed inside the second terminal part.
  • the weight of the second terminal part can be reduced, which is beneficial to reducing the weight of the battery cell.
  • an embodiment of the present application provides a battery.
  • the battery includes a box and the above-mentioned battery cell, and the battery cell is accommodated in the box.
  • inventions of the present application provide an electrical device.
  • the electrical device includes the above-mentioned battery cell, where the battery cell is used to provide electric energy, or includes the above-mentioned battery, where the battery is used to provide electrical energy.
  • Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Figure 2 is an exploded view of a battery provided by some embodiments of the present application.
  • Figure 3 is a schematic structural diagram of a battery cell provided by some embodiments of the present application.
  • Figure 4 is an exploded view of a battery cell provided by some embodiments of the present application.
  • Figure 5 is a schematic structural diagram of a current collecting component provided by some embodiments of the present application.
  • Figure 6 is a schematic structural diagram of a current collecting component provided by other embodiments of the present application.
  • Figure 7 is a schematic structural diagram of a current collecting component provided by some embodiments of the present application.
  • Figure 8 is a schematic front view of a battery cell provided by some embodiments of the present application.
  • Figure 9 is an exploded view of a battery cell provided by other embodiments of the present application.
  • Figure 10 is a schematic top view of a battery cell provided by some embodiments of the present application.
  • Figure 11 is a cross-sectional view at position B-B in Figure 10 (the second terminal part is surrounded by the outside of the first terminal part);
  • Figure 12 is a cross-sectional view at position B-B in Figure 10 (a third terminal is added on the basis of Figure 11);
  • Figure 13 is a cross-sectional view of the B-B position in Figure 10 (the contact portion is added on the basis of Figure 12);
  • Figure 14 is a cross-sectional view at position B-B in Figure 10 (the first terminal part and the second terminal part are stacked);
  • Fig. 15 is a cross-sectional view at position B-B in Fig. 10 (a third terminal part is added on the basis of Fig. 14).
  • Icon 10-box; 11-first part; 12-second part; 20-battery cell; 21-electrode assembly; 22-casing; 221-casing; 222-end cover; 23-electrode terminal; 231- First terminal part; 2311-cavity; 2312-contact part; 232-second terminal part; 233-third terminal part; 24-current collecting member; 241-first connection area; 242-second connection area; 2431-hole and slit part; 2432-first hole and slit part; 2433-second hole and slit part; 243-hollow area; 100-battery; 200-controller; 300-motor; 1000-vehicle.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
  • connection should be understood in a broad sense.
  • connection can be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • connection can be a fixed connection
  • connection can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • connection can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components.
  • “Plural” appearing in this application means two or more (including two).
  • battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells or magnesium ion battery cells, etc.
  • the embodiments of the present application are not limited to this.
  • the battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited to this.
  • the battery mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • Batteries generally include a box for packaging one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly consists of a positive electrode sheet, a negative electrode sheet and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector.
  • the positive electrode current collector that is not coated with the positive electrode active material layer protrudes from the positive electrode current collector that is coated with the positive electrode active material layer.
  • the cathode current collector without coating the cathode active material layer serves as the cathode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the negative electrode current collector that is not coated with the negative electrode active material layer protrudes from the negative electrode current collector that is coated with the negative electrode active material layer.
  • the negative electrode current collector that is not coated with the negative electrode active material layer is used as the negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon.
  • the number of positive electrode lugs is multiple and stacked together, and the number of negative electrode lugs is multiple and stacked together.
  • the material of the isolation film can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.
  • the electrode assembly may have a rolled structure or a laminated structure, and the embodiments of the present application are not limited thereto.
  • the battery cell includes an electrode assembly, an electrode terminal and a current collecting member.
  • the electrode assembly has tabs.
  • the tabs of the electrode assembly are electrically connected to the electrode terminals through the current collecting member.
  • the electrode terminals are used to output or input the battery cell. body's electrical energy.
  • the electrode terminals In order to facilitate the output or input of electric energy of the battery cell, the electrode terminals generally protrude from the casing of the battery cell. However, this will cause the electrode terminals to be susceptible to stress.
  • the stress on the electrode terminals is easily transmitted to the current collecting component, which drives the current collecting component to move as a whole, causing the connection between the current collecting component and the tab to fail, causing damage to the battery cell, thus shortening the life of the battery cell.
  • embodiments of the present application provide a battery cell in which a hollow area is provided on the current collecting member, and the hollow area divides the current collecting member into a first connection area and a second connection area.
  • the connection areas are respectively connected to the tabs and electrode terminals.
  • the existence of the hollow area enables the second connection area to deform relative to the first connection area, making it difficult for the stress to be transferred to the first connection area, causing the first connection area to move under stress, and making it difficult for the second connection area to move.
  • the first connection area is separated from the tab, which is beneficial to extending the life of the battery cell.
  • the second connection area is deformed relative to the first connection area, making it difficult for the first connection area to separate from the tab, thereby improving the battery cell quality. life span.
  • Power-consuming devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, etc.
  • Spacecraft include airplanes, rockets, space shuttles, spaceships, etc.
  • electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • electric tools include metal Cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and planers, etc.
  • the embodiments of this application impose no special restrictions on the above electrical equipment.
  • the following embodiments take the electrical equipment as vehicle 1000 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 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may serve as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating, and driving the vehicle 1000 to meet operating power requirements.
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • FIG. 2 is an exploded view of the battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a case 10 and battery cells 20 , and the battery cells 20 are accommodated in the case 10 .
  • the box 10 is used to provide an accommodation space for the battery cells 20, and the box 10 can adopt a variety of structures.
  • the box 10 may include a first part 11 and a second part 12 , the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a space for accommodating the battery cells 20 of accommodation space.
  • the second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure.
  • the first part 11 covers the open side of the second part 12 so that the first part 11 and the second part 12 jointly define a receiving space.
  • the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 is covered with the open side of the second part 12.
  • the box 10 formed by the first part 11 and the second part 12 can be in various shapes, such as cylinder, rectangular parallelepiped, etc.
  • the battery 100 there may be a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the plurality of battery cells 20 are connected in series and in parallel.
  • the plurality of battery cells 20 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 20 can be accommodated in the box 10 ; of course, the battery 100 can also be a plurality of battery cells 20 First, the battery modules are connected in series, parallel, or mixed to form a battery module, and then multiple battery modules are connected in series, parallel, or mixed to form a whole, and are accommodated in the box 10 .
  • the battery 100 may also include other structures.
  • the battery 100 may further include a bus component for realizing electrical connections between multiple battery cells 20 .
  • Each battery cell 20 may be a secondary battery cell or a primary battery cell; it may also be a lithium-sulfur battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, but is not limited thereto.
  • the battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes.
  • FIG. 3 is a schematic structural diagram of a battery cell 20 provided in some embodiments of the present application.
  • FIG. 4 is an exploded view of a battery cell 20 provided by some embodiments of the present application.
  • the battery cell 20 refers to the smallest unit that constitutes the battery 100.
  • the battery cell 20 includes an electrode assembly 21 , a casing 22 and other functional components.
  • the housing 22 includes an end cover 222 and a housing 221. The end cover 222 is connected to the housing 221.
  • the end cap 222 refers to a component that covers the opening of the housing 221 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap 222 may be adapted to the shape of the housing 221 to fit the housing 221 .
  • the end cap 222 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 222 is less likely to deform when subjected to extrusion and impact, so that the battery cell 20 can have higher durability. Structural strength and safety performance can also be improved.
  • the end cap 222 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • the housing 221 is a component used to cooperate with the end cover 222 to form an internal environment of the battery cell 20 , wherein the formed internal environment can be used to accommodate the electrode assembly 21 , electrolyte, and other components.
  • the housing 221 and the end cover 222 may be independent components, and an opening may be provided on the housing 221, and the end cover 222 covers the opening at the opening to form the internal environment of the battery cell 20.
  • the end cap 222 and the shell 221 can also be integrated. Specifically, the end cap 222 and the shell 221 can form a common connection surface before other components are put into the shell. When it is necessary to encapsulate the inside of the shell 221 When the end cap 222 is closed, the housing 221 is closed.
  • the shape of the housing 221 can be determined according to the specific shape and size of the electrode assembly 21 .
  • the housing 221 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • the electrode assembly 21 is a component in the battery cell 20 where electrochemical reactions occur.
  • One or more electrode assemblies 21 may be contained within the housing 22 .
  • the electrode assembly 21 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and an isolation film is usually provided between the positive electrode sheets and the negative electrode sheets.
  • the portions of the positive electrode sheet and the negative electrode sheet that contain active material constitute the main body of the electrode assembly 21 , and the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material each constitute tabs.
  • the positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively located at both ends of the main body. During the charging and discharging process of the battery 100, the positive active material and the negative active material react with the electrolyte.
  • Figure 5 is a schematic structural diagram of the current collecting component 24 provided by some embodiments of the present application.
  • the embodiment of the present application provides a battery cell 20.
  • the battery cell 20 includes an electrode assembly 21, a casing 22, an electrode terminal 23 and a current collecting member 24.
  • the electrode assembly 21 has tabs.
  • the housing 22 is used to accommodate the electrode assembly 21 .
  • the electrode terminal 23 is provided at one end of the housing 22 .
  • the current collecting member 24 is provided with a hollow area 243 , and the hollow area 243 divides the current collecting member 24 into a first connection area 241 and a second connection area 242 located on both sides of the hollow area 243 .
  • the first connection area 241 is connected to the tab, and the second connection area 242 is connected to the electrode terminal 23 .
  • the electrode terminal 23 is a component electrically connected to the electrode assembly 21 for outputting or inputting electric energy of the battery cell 20 .
  • the electrode terminal 23 is connected to the positive tab and can serve as the positive electrode of the battery cell 20 .
  • the electrode terminal 23 is connected to the negative electrode tab and can serve as the negative electrode of the battery cell 20 .
  • the electrode terminal 23 is provided at one end of the housing 22 along the first direction A.
  • the first direction A may be the A direction shown in FIG. 3 or FIG. 4 .
  • the current collecting member 24 is a member for electrically connecting the tab and the electrode terminal 23 .
  • the tab may be connected to one side of the current collecting member 24
  • the electrode terminal 23 may be connected to the other side of the current collecting member 24 .
  • the hollow area 243 is a hollow part on the current collecting member 24 .
  • the hollow area 243 divides the current collecting member 24 into a first connection area 241 and a second connection area 242.
  • the first connection area 241 and the second connection area 242 are respectively located on both sides of the hollow area 243. Among them, the first connection area 241 is connected to the tab, and the second connection area 242 is connected to the electrode terminal 23 to realize the electrical connection between the tab and the electrode terminal 23 .
  • the current collecting member 24 of the battery cell 20 is provided with a hollow area 243.
  • the hollow area 243 divides the current collecting member 24 into a first connection area 241 and a second connection area 242.
  • the first connection area 241 and the second connection area 242 They are connected to the tabs and electrode terminals 23 respectively.
  • the existence of the hollow area 243 enables the second connection area 242 to deform relative to the first connection area 241, so that the stress is not easily transmitted to the first connection area 241 and the first connection area 241 is not easily subject to stress.
  • the movement makes it difficult for the first connection area 241 to separate from the tab, which is beneficial to extending the life of the battery cell 20 .
  • a sealing member is provided between the electrode terminal 23 and the housing 22 .
  • the sealing member seals the electrode terminal 23 and the housing 22 to prevent external water vapor from entering the inside of the housing 22 or the electrolyte inside the housing 22 from leaking. out.
  • the sealing member may be a sealing ring.
  • the sealing member can be made of insulating material to insulate the electrode terminal 23 from the housing 22 .
  • the hollow area 243 includes two spaced hole portions 2431 , and the hole portions 2431 penetrate both surfaces of the current collecting member 24 in the thickness direction.
  • the portion of the current collecting member 24 located between the two slit portions 2431 forms the second connection area 242 .
  • the slit portion 2431 refers to a through-hole structure penetrating both sides of the current collecting member 24 in the thickness direction, and the through-hole structure extends along a certain trajectory to form a gap.
  • the current collecting member 24 is provided with two slit portions 2431 , and the two slit portions 2431 are spaced apart to define a second connection area 242 between the two slit portions 2431 .
  • the second connection area 242 located between the two holes and slits 2431 is easily deformed.
  • the stress is not easily
  • the first connection area 241 is not easily moved due to stress, and the first connection area 241 is not easily separated from the tab, which is beneficial to extending the life of the battery cell 20 .
  • the slit portion 2431 is easy to form, which can reduce the production cost of the current collecting member 24 .
  • the hole portion 2431 is an arc-shaped hole.
  • the slit portion 2431 is a slit structure extending along an arc trajectory. Since it extends along the arc trajectory, it has an arc shape, which is called an arc-shaped hole slit in this application.
  • the hole portion 2431 may be an arc-shaped hole or a parabolic hole.
  • the openings of the two slit portions 2431 are arranged opposite to each other.
  • the arc-shaped slit has an opening, and the opening of the slit portion 2431 refers to a position corresponding to the notch formed by the curved outline of the slit portion 2431 on the surface of the current collecting member 24 .
  • the center of the circle is located outside the second connection area 242.
  • Arranging the openings of the two slots 2431 opposite to each other is beneficial to dividing the first connection area 241 into a larger area and increasing the connection area between the first connection area 241 and the tab. Even if the stress is transmitted to the first connection area 241, Since the first connection area 241 and the tab have a large connection area, it is not easy to separate the first connection area 241 from the tab.
  • the current collecting member 24 is a flat plate-like structure.
  • the current collecting member 24 with a flat plate structure occupies less space of the battery cell 20 , which is beneficial to increasing the energy density of the battery cell 20 .
  • the hollow area 243 includes a first hollow area and a second hollow area arranged at intervals.
  • a plurality of first slits 2432 are provided in the first hollow area, and a plurality of first slits 2432 are provided in the second hollow area.
  • a second connection area 242 is formed between the first hollow area and the second hollow area.
  • the opening directions of the plurality of first slit portions 2432 in the first hollow area are the same, and are opposite to the opening directions of the plurality of second slit portions 2433 provided in the second hollow area, so that in the second connection When the region 242 is deformed, the partial twist directions between each two adjacent first hole portions 2432 are consistent, so that the deformation resistance of the second connection region 242 is small, and the stress experienced by the second connection region 242 is not easily transferred to First connection area 241.
  • FIG. 7 is a schematic structural diagram of the current collecting member 24 provided in some embodiments of the present application.
  • the hole portion 2431 is a linear hole.
  • the slit portion 2431 is a slit structure extending along a linear trajectory. Since it extends along a straight track, it is linear and is called a linear hole in this application.
  • FIG. 8 is a schematic front view of a battery cell 20 provided in some embodiments of the present application.
  • the battery cell 20 includes two electrode terminals 23 , and the two electrode terminals 23 have opposite polarities and are respectively disposed at two opposite ends of the housing 22 along the first direction A.
  • Each electrode terminal 23 is connected to the corresponding tab through a current collecting member 24 mentioned in the above embodiment of the present application.
  • the two electrode terminals 23 are respectively located at both ends of the housing 22 along the first direction A.
  • One of the electrode terminals 23 is electrically connected to the positive tab of the battery cell 20 to form the positive electrode of the battery cell 20 .
  • the other electrode terminal 23 is electrically connected to the negative electrode tab of the battery cell 20 to form the negative electrode of the battery cell 20 .
  • An electrode terminal 23 is connected to a corresponding tab through a current collection member 24 .
  • one electrode terminal 23 is electrically connected to the positive electrode tab through a current collecting member 24 to form the positive electrode of the battery cell 20 .
  • the other electrode terminal 23 is electrically connected to the negative electrode tab through a current collecting member 24 to form the negative electrode of the battery cell 20 .
  • one electrode terminal 23 serves as the positive electrode of the battery cell 20
  • the other electrode terminal 23 serves as the negative electrode of the battery cell 20 .
  • the battery cell 20 does not need to use the casing 221 as the negative electrode of the battery cell 20 , and it is less likely to cause corrosion of the casing 221 and less likely to cause a short circuit between two adjacent battery cells 20 .
  • the two electrode terminals 23 are respectively connected to the corresponding tabs through a current collecting member 24 mentioned in the above embodiment of the application. In this way, when each electrode terminal 23 is subjected to stress, it is not easily transmitted to its corresponding current collecting member 24. On the first connection area 241, it is difficult for the first connection area 241 to move, thereby causing the connection between the electrode terminal 23 and the corresponding tab to fail.
  • the housing 22 includes a housing 221 and an end cover 222 .
  • the housing 221 has an opening at one end along the first direction A, and the end cover 222 closes the opening.
  • One electrode terminal 23 is provided on the housing 221 , and the other electrode terminal 23 is provided on the end cover 222 .
  • the electrode assembly 21 By providing an opening at one end of the casing 221 along the first direction A, it is convenient to insert the electrode assembly 21 into the casing (install the electrode assembly 21 into the interior of the casing 221 ) when producing the battery cell 20 .
  • the opening is closed to isolate the inside and outside of the housing 221 to prevent external impurities from causing damage to the battery cell 20 .
  • one electrode terminal 23 is provided on the end cover 222, and the other electrode terminal 23 is provided on the housing 221, which facilitates production and helps reduce production costs.
  • FIG. 9 is an exploded view of a battery cell 20 provided in other embodiments of the present application.
  • the housing 22 includes a housing 221 and two end caps 222.
  • the housing 221 has openings at both ends along the first direction A, and the two end caps 222 close the two openings.
  • the two electrode terminals 23 are respectively provided on the two end caps 222 in one-to-one correspondence.
  • the two electrode terminals 23 are respectively provided on the two end caps 222 in one-to-one correspondence" means that one electrode terminal 23 is provided on one end cover 222 and the other electrode terminal 23 is provided on the other end cover 222 .
  • the cover 222 closes the opening to isolate the inside and outside of the housing 221 to prevent external impurities from causing damage to the battery cell 20 .
  • the two electrode terminals 23 are arranged on the two end caps 222 in one-to-one correspondence, which facilitates production and helps reduce production costs.
  • the height of the portion of the electrode terminal 23 protruding from the housing 22 is H, and the length of the housing 22 is L, which satisfies: H/L ⁇ 0.02.
  • H represents the height of the portion of the electrode terminal 23 protruding from the housing 22 in the first direction A.
  • the electrode terminal 23 is provided at one end of the housing 22 along the first direction A.
  • the height of the portion of the electrode terminal 23 protruding from the housing 22 can also be understood as: along the first direction A, between the end surface of the housing 22 where the electrode terminal 23 is disposed and the surface of the electrode terminal 23 located outside the housing 22 and away from the end surface. distance.
  • H/L represents the ratio of the height of the portion of the electrode terminal 23 protruding from the housing 22 along the first direction A to the length of the housing 22 along the first direction A.
  • the height of the portion of the electrode terminal 23 protruding from the housing 22 along the first direction A does not exceed 0.02 times the length of the housing 22 along the first direction A. In this way, the height of the portion of the electrode terminal 23 protruding from the housing 22 along the first direction A is smaller, occupying less space, which is beneficial to improving the space utilization efficiency when the batteries 100 are grouped or assembled, thereby increasing the energy density. If H/L>0.02, the height of the portion of the electrode terminal 23 protruding from the housing 22 along the first direction A is relatively large, occupying a large space, which is not conducive to improving the space utilization efficiency when the battery 100 is grouped or assembled. .
  • H/L 0.15
  • the height of the portion of the electrode terminal 23 protruding from the housing 22 along the first direction A does not exceed 0.015 times the length of the housing 22 along the first direction A. In this way, the height of the portion of the electrode terminal 23 protruding from the housing 22 along the first direction A is smaller, occupying less space, which is beneficial to improving space utilization efficiency when the batteries 100 are grouped or assembled.
  • the housing 22 is cylindrical and has an outer diameter D.
  • the length of the housing 22 along the first direction A is L, which satisfies: L/D ⁇ 2.
  • L/D represents the ratio of the outer diameter of the housing 22 to the length L of the housing 22 along the first direction A.
  • the casing 22 is cylindrical, and the battery cells 20 are cylindrical battery cells 20 . Limiting the ratio of the length of the housing 22 along the first direction A to the outer diameter of the housing 22 to be greater than or equal to 2 is suitable for the rolled electrode assembly 21 , so that the electrode assembly 21 can be easily installed into the housing 22 .
  • Figure 10 is a schematic top view of a battery cell 20 provided in some embodiments of the present application.
  • FIG. 11 is a cross-sectional view at the B-B position in FIG. 10 (the second terminal part 232 is surrounding the outside of the first terminal part 231).
  • the electrode terminal 23 includes a first terminal part 231 and a second terminal part 232 of different materials, and the first terminal part 231 is connected to the second terminal part 232 .
  • the first terminal part 231 is connected to the current collecting member 24 , and the second terminal part 232 is installed on the housing 22 .
  • the first terminal portion 231 is a portion of the electrode terminal 23 for electrical connection with the current collecting member 24 .
  • the first terminal portion 231 is made of the same material as the current collecting member 24 .
  • the second terminal portion 232 is a portion of the electrode terminal 23 for electrical connection with the bus member.
  • the second terminal part 232 is installed on the housing 22 to fix the electrode terminal 23 on the housing 22 .
  • the second terminal portion 232 is made of the same material as the bus member.
  • the bus component may be a busbar.
  • the first terminal part 231 is connected to the second terminal part 232 to allow current to pass through the first terminal part 231 and the second terminal part 232 to facilitate the output or input of electric energy of the battery cell 20 .
  • the material of the pole lug is different from the material of the bus component, and the same material is easier to weld. Therefore, the material of the current collecting member 24 can be set to be the same as the material of the tab, so as to facilitate welding of the current collecting member 24 and the tab.
  • the first terminal portion 231 is made of the same material as the current collecting member 24 to facilitate welding of the first terminal portion 231 and the current collecting member 24 .
  • the material of the second terminal part 232 is set to be the same as the material of the bus component to facilitate welding of the second terminal part 232 and the bus component.
  • the first terminal part 231 is made of copper, and the second terminal part 232 is made of aluminum, so that the electrode terminal 23 becomes a composite terminal, that is, a terminal structure formed by combining metals of different materials.
  • the material of the tab is copper, so the material of the first terminal part 231 is also set to be copper.
  • the material of the bus member is aluminum, so the material of the second terminal portion 232 is also made of aluminum.
  • the second terminal part 232 is surrounding the outside of the first terminal part 231 .
  • the second terminal part 232 is arranged around the outside of the first terminal part 231
  • the outer surfaces of 231 are connected together.
  • the first terminal portion 231 is located in the middle of the electrode terminal 23 to facilitate welding with the current collecting member 24 .
  • the second terminal part 232 is arranged around the outside of the first terminal part 231 to facilitate installation on the housing 22 and welding with the bus component.
  • the sealing member is surrounding the outside of the second terminal part 232 to seal the second terminal part 232 and the housing 22 .
  • the first terminal portion 231 is formed with a cavity 2311 , and an opening is opened at one end of the cavity 2311 .
  • the first terminal portion 231 is formed with a cavity 2311 , and the cavity 2311 has an opening formed at an end of the first terminal portion 231 away from the electrode assembly 21 .
  • the opening of the cavity 2311 faces away from the electrode assembly 21 .
  • the weight of the first terminal part 231 can be reduced, which is beneficial to reducing the weight of the battery cell 20 , and can also save materials and reduce material costs.
  • FIG. 12 is a cross-sectional view at position B-B in FIG. 10 (a third terminal portion 233 is added on the basis of FIG. 11 ).
  • the electrode terminal 23 includes a third terminal portion 233 connected to the second terminal portion 232 and closing the opening, and the third terminal portion 233 is used for connecting with the bus member.
  • the third terminal part 233 may be connected to a side of the second terminal part 232 away from the electrode assembly 21 to close the opening of the cavity 2311 formed in the first terminal part 231 .
  • the third terminal part 233 may be used for welding with the bus member to increase the connection area between the bus member and the electrode terminal 23 .
  • the third terminal part 233 may be made of the same material as the bus component to facilitate welding of the third terminal part 233 and the bus component.
  • the third terminal portion 233 can be connected to the bus component, thereby increasing the connection area between the electrode terminal 23 and the bus component, making the connection between the electrode terminal 23 and the bus component more convenient.
  • the third terminal portion 233 closes the opening, which can prevent impurities outside the battery cell 20 from gathering in the cavity 2311 .
  • FIG. 13 is a cross-sectional view at position B-B in FIG. 10 (the contact portion 2312 is added on the basis of FIG. 12 ).
  • a contact portion 2312 is protruding from the outer periphery of the first terminal portion 231.
  • the contact portion 2312 contacts the second terminal portion. 232 toward one end of the electrode assembly 21 to reduce the risk of the first terminal part 231 being separated from the second terminal part 232 along the first direction A.
  • FIG. 14 is a cross-sectional view at position B-B in FIG. 10 (the first terminal part 231 and the second terminal part 232 are stacked).
  • the first terminal portion 231 and the second terminal portion 232 are stacked.
  • the first terminal portion 231 is away from the electrode assembly 21
  • One end of the electrode assembly 21 is connected to an end of the second terminal portion 232 facing the electrode assembly 21 , thereby forming a stacked structure along the first direction.
  • the first terminal part 231 and the second terminal part 232 are stacked may also be understood to mean that the first terminal part 231 and the second terminal part 232 are stacked along the first direction A. Since the first terminal part 231 needs to be connected to the current collecting member 24, along the first direction A, in the direction in which the electrode assembly 21 points to the end cover 222, the first terminal part 231 and the second terminal part 232 are arranged in sequence. Furthermore, the surface of the first terminal portion 231 facing the second terminal portion 232 is connected to the surface of the second terminal portion 232 facing the first terminal portion 231 .
  • the first terminal portion 231 and the second terminal portion 232 are stacked so that the first terminal portion 231 and the current collecting member 24 have a larger connection area, and the second terminal portion 232 and the current collecting member also have a larger connection area.
  • a cavity 2311 is formed inside the second terminal part 232 .
  • a cavity 2311 is formed inside the second terminal part 232 , and the cavity 2311 may or may not have an opening. In the embodiment shown in FIG. 14 , the cavity 2311 has an opening formed at an end of the second terminal part 232 away from the first terminal part 231 .
  • the weight of the second terminal part 232 can be reduced, which is beneficial to reducing the weight of the battery cell 20, saving materials, and reducing costs.
  • FIG. 15 is a cross-sectional view at position B-B in FIG. 10 (a third terminal portion 233 is added on the basis of FIG. 14 ).
  • the electrode terminal 23 includes a third terminal part 233 connected to the second terminal part 232 and closing the opening of the cavity 2311 formed in the second terminal part 232.
  • the third terminal part 233 is To connect with the confluence component.
  • the third terminal portion 233 can be connected to the bus component, thereby increasing the connection area between the electrode terminal 23 and the bus component, making the connection between the electrode terminal 23 and the bus component more convenient.
  • the electrode terminal 23 is made of one material, and the first connection area 241 and the second connection area 242 of the current collecting member 24 are made of different materials.
  • the material of the first connection area 241 is the same as the material of the tab
  • the material of the second connection area 242 is the same as the material of the electrode terminal 23, so that the tab and the first connection area 241 are welded, and the second connection area 242 is connected to the electrode.
  • Terminal 23 is soldered.
  • the material of the electrode terminal 23 is the same as that of the bus component, so as to facilitate welding of the electrode terminal 23 and the bus component.
  • the material of the current collecting member 24 can also be set to a composite conductive structure composed of one layer of copper and one layer of aluminum, that is, the sheet-shaped current collecting member 24 includes interconnected copper layers and aluminum layers; the current collecting member 24 The copper layer is welded to the copper tab, and the aluminum layer of the current collecting member 24 is welded to the aluminum electrode terminal.
  • the embodiment of the present application provides a battery 100.
  • the battery 100 includes a box 10 and the above-mentioned battery cells 20.
  • the battery cells 20 are accommodated in the box 10.
  • An embodiment of the present application provides an electrical device.
  • the electrical device includes the above-mentioned battery unit 20, which is used to provide electric energy, or includes the above-mentioned battery 100, which is used to provide electric energy.
  • the embodiment of the present application provides a battery cell 20.
  • the battery cell 20 includes an electrode assembly 21, a casing 22, an electrode terminal 23 and a current collecting member 24.
  • the electrode assembly 21 has tabs, and the housing 22 is used to accommodate the electrode assembly 21 .
  • the electrode terminal 23 is provided at one end of the housing 22 .
  • the current collecting member 24 is provided with a hollow area 243 , and the hollow area 243 divides the current collecting member 24 into a first connection area 241 and a second connection area 242 located on both sides of the hollow area 243 .
  • the first connection area 241 is connected to the tab, and the second connection area 242 is connected to the electrode terminal 23 .
  • the hollow area 243 includes two arc-shaped slots 2431 spaced apart. The slots 2431 penetrate both surfaces of the current collecting member 24 in the thickness direction. The portion of the current collecting member 24 between the two slots 2431 forms a second Connection area 242.
  • the current collecting member 24 of the battery cell 20 is provided with a hollow area 243.
  • the hollow area 243 divides the current collecting member 24 into a first connection area 241 and a second connection area 242.
  • the first connection area 241 and the second connection area 242 They are connected to the tabs and electrode terminals 23 respectively.
  • the existence of the hollow area 243 enables the second connection area 242 to deform relative to the first connection area 241, so that the stress is not easily transmitted to the first connection area 241 and the first connection area 241 is not easily subject to stress.
  • the movement makes it difficult for the first connection area 241 to separate from the tab, which is beneficial to extending the life of the battery cell 20 .
  • the slit portion 2431 is easy to form, which can reduce the production cost of the current collecting member 24 .
  • the use of arc-shaped holes makes the second connection area 242 more susceptible to deformation.
  • the battery cell 20 includes two electrode terminals 23.
  • the two electrode terminals 23 have opposite polarities and are respectively provided at two opposite ends of the housing 22 along the first direction A. Each electrode terminal 23 is connected to the corresponding electrode through a current collecting member 24. ear connection.
  • one electrode terminal 23 serves as the positive electrode of the battery cell 20
  • the other electrode terminal 23 serves as the negative electrode of the battery cell 20 .
  • the battery cell 20 does not need to use the casing 221 as the negative electrode of the battery cell 20 , and it is less likely to cause corrosion of the casing 221 and less likely to cause a short circuit between two adjacent batteries 100 .
  • the housing 22 includes a housing 221 and an end cover 222.
  • the housing 221 has an opening at one end along the first direction A.
  • the end cover 222 closes the opening.
  • One electrode terminal 23 is provided on the housing 221, and the other electrode terminal 23 is provided on the end cover 222. .
  • By providing an opening at one end of the casing 221 along the first direction A it is convenient to insert the electrode assembly 21 into the casing (install the electrode assembly 21 into the interior of the casing 221 ) when producing the battery cell 20 .
  • Through the end cover 222 The opening is closed to isolate the inside and outside of the housing 221 to prevent external impurities from causing damage to the battery cell 20 .
  • one electrode terminal 23 is provided on the end cover 222, and the other electrode terminal 23 is provided on the housing 221, which facilitates production and helps reduce production costs.
  • the housing 22 includes a housing 221 and two end caps 222.
  • the housing 221 has openings at both ends along the first direction A.
  • the two end caps 222 close the two openings.
  • the two electrode terminals 23 are respectively arranged in a one-to-one correspondence.
  • Two end caps 222 By providing openings at both ends of the case 221 along the first direction A, it is convenient to insert the electrode assembly 21 into the case (install the electrode assembly 21 into the interior of the case 221 ) when producing the battery cell 20 .
  • the cover 222 closes the opening to isolate the inside and outside of the housing 221 to prevent external impurities from causing damage to the battery cell 20 .
  • the two electrode terminals 23 are arranged on the two end caps 222 in one-to-one correspondence, which facilitates production and helps reduce production costs.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

一种电池单体、电池及用电设备。电池单体包括电极组件（21）、外壳（22）、电极端子（23）和集流构件（24）。电极组件（21）具有极耳。外壳（22）用于容纳电极组件（21）。沿第一方向，电极端子（23）设置于外壳（22）的一端。集流构件（24）设置有镂空区（243），镂空区（243）将集流构件（24）划分为位于镂空区（243）的两侧第一连接区（241）和第二连接区（242）。第一连接区（241）与极耳连接，第二连接区（242）与电极端子（23）连接。当电极端子（23）受到应力作用时，镂空区（243）的存在使第二连接区（242）能够相对于第一连接区（241）形变，使得应力不易传递至第一连接区（241），不易导致第一连接区（241）与极耳分离，有利于提升电池单体的寿命。

Description

电池单体、电池及用电设备 技术领域
本申请涉及电池领域，具体而言，涉及一种电池单体、电池及用电设备。
背景技术
电池在新能源领域应用甚广，例如电动汽车、新能源汽车等，新能源汽车、电动汽车已经成为汽车产业的发展新趋势。电池技术的发展要同时考虑多方面的设计因素，例如，能量密度、放电容量、充放电倍率等性能参数。另外，还需要考虑电池的寿命。然而，目前的电池的寿命较短。
发明内容
本申请实施例的目的在于提供一种电池单体、电池及用电设备，其旨在改善相关技术中电池的寿命较短的问题。
第一方面，本申请实施例提供了一种电池单体，所述电池单体包括电极组件、外壳、电极端子和集流构件，所述电极组件具有极耳；所述外壳用于容纳所述电极组件；沿第一方向，所述电极端子设置于所述外壳的一端；所述集流构件设置有镂空区，所述镂空区将所述集流构件划分为位于所述镂空区的两侧第一连接区和第二连接区，所述第一连接区与所述极耳连接，所述第二连接区与所述电极端子连接。
在上述技术方案中，该电池单体的集流构件上设置有镂空区，镂空区将集流构件划分为第一连接区和第二连接区，第一连接区和第二连接区分别与极耳和电极端子连接。当电极端子受到应力作用时，镂空区的存在使第二连接区能够相对于第一连接区形变，使得应力不易传递至第一连接区，不易导致第一连接区受到应力而移动，不易使第一连接区与极耳分离，有利于提升电池单体的寿命。简而言之，在电极端子受到应力时，不易导致集流构件整个移动，而是第二连接区相对于第一连接区形变，使得第一连接区不易与极耳分离，从而提高电池单体的寿命。
作为本申请实施例的一种可选技术方案，所述镂空区包括间隔设置的两个孔缝部，所述孔缝部贯穿所述集流构件厚度方向的两表面，所述集流构件位于两个所述孔缝部之间的部分形成所述第二连接区。
在上述技术方案中，通过设置两个贯穿集流构件厚度方向的两表面的孔缝部，使得位于两个孔缝部之间的第二连接区易于发生形变，在电极端子受到应力时，应力不易传递至第一连接区，不易导致第一连接区受到应力而移动，不易使第一连接区与极耳分离，有利于提升电池单体的寿命。另外，孔缝部易于成型，可降低集流构件的生产成本。
作为本申请实施例的一种可选技术方案，所述孔缝部为弧形孔缝。
在上述技术方案中，采用弧形的孔缝，使得第二连接区更容易发生形变。
作为本申请实施例的一种可选技术方案，两个所述孔缝部的开口相背设置。
在上述技术方案中，将两个孔缝部的开口相背设置，有利于将第一连接区划分地较大，增大第一连接区与极耳的连接面积，即使应力传递到第一连接区，由于第一连接区与极耳具有较大的连接面积，也不易导致第一连接区与极耳分离。
作为本申请实施例的一种可选技术方案，所述集流构件为平板状结构。
在上述技术方案中，平板状结构的集流构件，对电池单体的空间占用较小，有利于提升电池单体的能量密度。
作为本申请实施例的一种可选技术方案，所述电池单体包括两个所述电极端子，两个所述电极端子极性相反且分别设置于所述外壳沿第一方向相对的两端，每个所述电极端子通过一个所述集流构件与对应的所述极耳连接。
在上述技术方案中，通过设置两个电极端子，一个电极端子作为电池单体的正极，另一个电极端子作为电池单体的负极。这样，电池单体无需将壳体作为电池单体的负极，不易导致壳体腐蚀，不易导致相邻的两个电池单体之间发生短路。
作为本申请实施例的一种可选技术方案，所述外壳包括壳体和端盖，所述壳体沿所述第一方向的一端具有开口，所述端盖封闭所述开口，一个所述电极端子设置于所述壳体，另一个所述电极端子设置于所述端盖。
在上述技术方案中，通过在壳体沿第一方向的一端设置开口，便于在生产电池单体时对电极组件进行入壳操作(将电极组件装入到壳体的内部)，通过端盖封闭开口，以将壳体的内外隔绝，避免外界杂质对电池单体造成损害。此时，将一个电极端子设置于端盖，另一个电极端子设置于壳体，生产制造方便，有利于降低生产成本。
作为本申请实施例的一种可选技术方案，所述外壳包括壳体和两个端盖，所述壳体沿所述第一方向的两端分别具有开口，两个所述端盖封闭两个所述开口，两个所述电极端子分别一一对应的设置于两个所述端盖。
在上述技术方案中，通过在壳体沿第一方向的两端均设置开口，便于在生产电池单体时对电极组件进行入壳操作(将电极组件装入到壳体的内部)，通过端盖封闭开口，以将壳体的内外隔绝，避免外界杂质对电池单体造成损害。此时，将两个电极端子分别一一对应的设置于两个端盖，生产制造方便，有利于降低生产成本。
作为本申请实施例的一种可选技术方案，沿所述第一方向，所述电极端子凸出于所述外壳的部分的高度为H，所述外壳的长度为L，满足：H/L≤0.02。
在上述技术方案中，电极端子沿第一方向凸出于外壳的部分的高度不超过外壳沿第一方向的长度的0.02倍。这样，电极端子沿第一方向凸出于外壳的部分的高度较小，对空间的占用较小，有利于提高电池的能量密度。若H/L＞0.02，则电极端子沿第一方向凸出于外壳的部分的高度较大，对空间的占用较大，不利于电池的能量密度的提高。
作为本申请实施例的一种可选技术方案，H/L≤0.015。
在上述技术方案中，电极端子沿第一方向凸出于外壳的部分的高度不超过外壳沿第一方向的长度的0.015倍。这样，电极端子沿第一方向凸出于外壳的部分的高度较小，对空间的占用较小，有利于提高电池的能量密度。
作为本申请实施例的一种可选技术方案，所述外壳为圆柱形，所述外壳的外径为D，所述外壳沿所述第一方向的长度为L，满足：L/D≥2。
在上述技术方案中，外壳为圆柱形，电池单体为圆柱电池单体。将外壳沿第一方向的长度与外壳的外径之比限制为大于或等于2，使得电池单体内部空间较为容易利用。
作为本申请实施例的一种可选技术方案，所述电极端子包括材料不同的第一端子部和第二端子部，所述第一端子部与所述第二端子部连接，所述第一端子部连接于所述集流构件，所述第二端子部安装于所述外壳。
在上述技术方案中，一般来说，极耳的材质和汇流构件的材质不同，而相 同材料在焊接时较为容易。因此，可将集流构件的材质设置为与极耳的材质相同，以便于集流构件与极耳焊接。而将第一端子部的材质设置为与集流构件的材质相同，以便于第一端子部与集流构件焊接。将第二端子部的材质设置为与汇流构件的材质相同，以便于第二端子部与汇流构件焊接。
作为本申请实施例的一种可选技术方案，所述第一端子部的材质为铜，所述第二端子部的材质为铝。
在上述技术方案中，一般来说，极耳的材质为铜，因此，第一端子部的材质也设置为铜材质。汇流构件的材质为铝，因此，第二端子部的材质也设置为铝。
作为本申请实施例的一种可选技术方案，所述第二端子部围设于所述第一端子部的外侧。
在上述技术方案中，第一端子部位于电极端子的中部位置，便于与集流构件焊接。第二端子部围设于第一端子部的外侧，以便于安装于壳体，并便于与汇流构件焊接。
作为本申请实施例的一种可选技术方案，所述第一端子部形成有一端开口的空腔。
在上述技术方案中，通过在第一端子部形成一端开口的空腔，可以降低第一端子部的重量，有利于降低电池单体的重量。
作为本申请实施例的一种可选技术方案，所述电极端子包括第三端子部，所述第三端子部连接于所述第二端子部并封闭所述开口，所述第三端子部用于与汇流构件连接。
在上述技术方案中，通过设置第三端子部，一方面第三端子部可以与汇流构件连接，增大电极端子与汇流构件的连接面积，使电极端子和汇流构件的连接更加方便。另一方面，第三端子部封闭开口，能够避免电池单体外的杂质聚集于空腔内。
作为本申请实施例的一种可选技术方案，沿所述第一方向，所述第一端子部和所述第二端子部层叠设置。
在上述技术方案中，将第一端子部和第二端子部层叠设置，使得第一端子部与集流构件具有较大的连接面积，同时第二端子部与汇流构件也具有较大的连接面积。
作为本申请实施例的一种可选技术方案，所述第二端子部内部形成有空腔。
在上述技术方案中，通过在第二端子部内部形成空腔，可以降低第二端子部的重量，有利于降低电池单体的重量。
第二方面，本申请实施例提供了一种电池，所述电池包括箱体和上述的电池单体，所述电池单体容纳于所述箱体内。
第三方面，本申请实施例提供了一种用电设备，所述用电设备包括上述的电池单体，所述电池单体用于提供电能，或者包括上述的电池，所述电池用于提供电能。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请一些实施例提供的车辆的结构示意图；
图2为本申请一些实施例提供的电池的***图；
图3为本申请一些实施例提供的电池单体的结构示意图；
图4为本申请一些实施例提供的电池单体的***图；
图5为本申请一些实施例提供的集流构件的结构示意图；
图6为本申请另一些实施例提供的集流构件的结构示意图；
图7为本申请又一些实施例提供的集流构件的结构示意图；
图8为本申请一些实施例提供的电池单体的主视示意图；
图9为本申请另一些实施例提供的电池单体的***图；
图10为本申请一些实施例提供的电池单体的俯视示意图；
图11为图10中B-B位置的剖视图(第二端子部围设于第一端子部的外侧)；
图12为图10中B-B位置的剖视图(在图11的基础上增加第三端子部)；
图13为图10中B-B位置的剖视图(在图12的基础上增加抵接部)；
图14为图10中B-B位置的剖视图(第一端子部和第二端子部层叠设置)；
图15为图10中B-B位置的剖视图(在图14的基础上增加第三端子部)。
图标：10-箱体；11-第一部分；12-第二部分；20-电池单体；21-电极组件；22-外壳；221-壳体；222-端盖；23-电极端子；231-第一端子部；2311-空腔；2312-抵接部；232-第二端子部；233-第三端子部；24-集流构件；241-第一连接区；242-第二连接区；2431-孔缝部；2432-第一孔缝部；2433-第二孔缝部；243-镂空区；100-电池；200-控制器；300-马达；1000-车辆。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“附接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请中，电池单体可以包括锂离子二次电池单体、锂离子一次电池单体、锂硫电池单体、钠锂离子电池单体、钠离子电池单体或镁离子电池单体等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
电池单体包括电极组件和电解液，电极组件由正极片、负极片和隔离膜组成。电池单体主要依靠金属离子在正极片和负极片之间移动来工作。正极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面，未涂敷正极活性物质层的正极集流体凸出于已涂覆正极活性物质层的正极集流体，未涂敷正极活性物质层的正极集流体作为正极耳。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面，未涂敷负极活性物质层的负极集流体凸出于已涂覆负极活性物质层的负极集流体，未涂敷负极活性物质层的负极集流体作为负极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极耳的数量为多个且层叠在一起，负极耳的数量为多个且层叠在一起。隔离膜的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。此外，电极组件可以是卷绕式结构，也可以是叠片式结构，本申请实施例并不限于此。
电池技术的发展要同时考虑多方面的设计因素，例如，能量密度、放电容量、充放电倍率等性能参数。另外，还需要考虑电池的寿命。然而，目前的电池的寿命较短。
发明人进一步研究发现，电池单体包括电极组件、电极端子和集流构件，电极组件具有极耳，电极组件的极耳通过集流构件与电极端子电连接，电极端子用于输出或输入电池单体的电能。为了便于输出或输入电池单体的电能，电极端子一般凸出于电池单体的外壳。但这样会导致电极端子容易受到应力作用。电极端子所受的应力容易传递至集流构件，从而带动集流构件整体移动，使得集流构件与极耳的连接失效，使得电池单体损坏，由此造成了电池单体的寿命较短。
鉴于此，本申请实施例提供一种电池单体，通过在集流构件上设置有镂空区，镂空区将集流构件划分为第一连接区和第二连接区，第一连接区和第二连接区分别与极耳和电极端子连接。当电极端子受到应力作用时，镂空区的存在使第二连接区能够相对于第一连接区形变，使得应力不易传递至第一连接区，不易导致第一连接区 受到应力而移动，不易使第一连接区与极耳分离，有利于提升电池单体的寿命。简而言之，在电极端子受到应力时，不易导致集流构件整个移动，而是第二连接区相对于第一连接区形变，使得第一连接区不易与极耳分离，从而提高电池单体的寿命。
本申请实施例描述的技术方案适用于电池以及使用电池的用电设备。
用电设备可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述用电设备不做特殊限制。
以下实施例为了方便说明，以用电设备为车辆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***图。电池100包括箱体10和电池单体20，电池单体20容纳于箱体10内。其中，箱体10用于为电池单体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11和第二部分12，第一部分11与第二部分12相互盖合，第一部分11和第二部分12共同限定出用于容纳电池单体20的容纳空间。第二部分12可以为一端开口的空心结构，第一部分11可以为板状结构，第一部分11盖合于第二部分12的开口侧，以使第一部分11与第二部分12共同限定出容纳空间；第一部分11和第二部分12也可以是均为一侧开口的空心结构，第一部分11的开口侧盖合于第二部分12的开口侧。当然，第一部分11和第二部分12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，电池单体20可以是多个，多个电池单体20之间可串联或并联或混联，混联是指多个电池单体20中既有串联又有并联。多个电池单体20之间可直接串联或并联或混联在一起，再将多个电池单体20构成的整体容纳于箱体10内；当然，电池100也可以是多个电池单体20先串联或并联或混联组成电池模块形式，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，用于实现多个电池单体20之间的电连接。
其中，每个电池单体20可以为二次电池单体或一次电池单体；还可以是锂硫电池单体、钠离子电池单体或镁离子电池单体，但不局限于此。电池单体20可呈圆柱体、扁平体、长方体或其它形状等。
请参照图3和图4，图3为本申请一些实施例提供的电池单体20的结构示意图。图4为本申请一些实施例提供的电池单体20的***图。电池单体20是指组成 电池100的最小单元。如图3和图4，电池单体20包括有电极组件21、外壳22以及其他的功能性部件。外壳22包括端盖222和壳体221，端盖222连接于壳体221。
端盖222是指盖合于壳体221的开口处以将电池单体20的内部环境隔绝于外部环境的部件。不限地，端盖222的形状可以与壳体221的形状相适应以配合壳体221。可选地，端盖222可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖222在受挤压碰撞时就不易发生形变，使电池单体20能够具备更高的结构强度，安全性能也可以有所提高。端盖222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。
壳体221是用于配合端盖222以形成电池单体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21、电解液以及其他部件。壳体221和端盖222可以是独立的部件，可以于壳体221上设置开口，通过在开口处使端盖222盖合开口以形成电池单体20的内部环境。不限地，也可以使端盖222和壳体221一体化，具体地，端盖222和壳体221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221的内部时，再使端盖222盖合壳体221。壳体221的形状可以根据电极组件21的具体形状和尺寸大小来确定。壳体221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21是电池单体20中发生电化学反应的部件。外壳22内可以包含一个或更多个电极组件21。电极组件21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离膜。正极片和负极片具有活性物质的部分构成电极组件21的主体部，正极片和负极片不具有活性物质的部分各自构成极耳。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100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。
请参照图3、图4和图5，图5为本申请一些实施例提供的集流构件24的结构示意图。本申请实施例提供了一种电池单体20，电池单体20包括电极组件21、外壳22、电极端子23和集流构件24。电极组件21具有极耳。外壳22用于容纳电极组件21。沿第一方向A，电极端子23设置于外壳22的一端。集流构件24设置有镂空区243，镂空区243将集流构件24划分为位于镂空区243的两侧第一连接区241和第二连接区242。第一连接区241与极耳连接，第二连接区242与电极端子23连接。
电极端子23是与电极组件21电连接，以用于输出或输入电池单体20的电能的部件。电极端子23与正极极耳连接，可以作为电池单体20的正极。电极端子23与负极极耳连接，可以作为电池单体20的负极。电极端子23沿第一方向A设置于外壳22的一端。第一方向A可以是图3或图4中所示出的A方向。
集流构件24是用于将极耳和电极端子23电连接的部件。极耳可以连接于集流构件24的一侧，电极端子23可以连接于集流构件24的另一侧。
镂空区243是集流构件24上的镂空部分。镂空区243将集流构件24划分为第一连接区241和第二连接区242，第一连接区241和第二连接区242分别位于镂空区243的两侧。其中，第一连接区241与极耳连接，第二连接区242与电极端子23连接，以实现极耳和电极端子23的电连接。
该电池单体20的集流构件24上设置有镂空区243，镂空区243将集流构件24划分为第一连接区241和第二连接区242，第一连接区241和第二连接区242分别与极耳和电极端子23连接。当电极端子23受到应力作用时，镂空区243的存在使第二连接区242能够相对于第一连接区241形变，使得应力不易传递至第一连接区241，不易导致第一连接区241受到应力而移动，不易使第一连接区241与极耳分离，有利 于提升电池单体20的寿命。简而言之，在电极端子23受到应力时，不易导致集流构件24整个移动，而是第二连接区242相对于第一连接区241形变，使得第一连接区241不易与极耳分离，从而提高电池单体20的寿命。
在一些实施例中，电极端子23与外壳22之间还设置有密封件，密封件将电极端子23和外壳22密封，以防止外界水汽进入到外壳22的内部，或者外壳22内部的电解液渗出。具体地，密封件可以为密封圈。同时，密封件可以采用绝缘材质，以将电极端子23与外壳22绝缘隔离。
请参照图4和图5，在一些实施例中，镂空区243包括间隔设置的两个孔缝部2431，孔缝部2431贯穿集流构件24厚度方向的两表面。集流构件24位于两个孔缝部2431之间的部分形成第二连接区242。
孔缝部2431是指贯穿集流构件24厚度方向的两侧的通孔结构，并且通孔结构沿着某一轨迹延伸，形成缝隙。
在一些实施例中，集流构件24上设置有两个孔缝部2431，两个孔缝部2431间隔设置，以在两个孔缝部2431之间划分出第二连接区242。
通过设置两个贯穿集流构件24厚度方向的两表面的孔缝部2431，使得位于两个孔缝部2431之间的第二连接区242易于发生形变，在电极端子23受到应力时，应力不易传递至第一连接区241，不易导致第一连接区241受到应力而移动，不易使第一连接区241与极耳分离，有利于提升电池单体20的寿命。另外，孔缝部2431易于成型，可降低集流构件24的生产成本。
在一些实施例中，孔缝部2431为弧形孔缝。
孔缝部2431是沿着弧轨迹延伸的孔缝结构。由于其沿着弧轨迹延伸，因此呈弧形，本申请称之为弧形孔缝。孔缝部2431可以为圆弧形孔缝，也可以为抛物线形孔缝。
采用弧形的孔缝，使得第二连接区242更容易发生形变，在电极端子23受到应力时，应力不易传递至第一连接区241，不易导致第一连接区241受到应力而移动。
请参照图5，在一些实施例中，两个孔缝部2431的开口相背设置。
弧形孔缝具有开口，孔缝部2431的开口是指孔缝部2431的弯曲轮廓在集流构件24的表面上形成的凹口对应的位置。以孔缝部2431为圆弧形孔缝为例，“两个孔缝部2431的开口相背设置”即是指两个孔缝部2431的开口的朝向相反，并且每个孔缝部2431的圆心位于第二连接区242之外。
将两个孔缝部2431的开口相背设置，有利于将第一连接区241划分地较大，增大第一连接区241与极耳的连接面积，即使应力传递到第一连接区241，由于第一连接区241与极耳具有较大的连接面积，也不易导致第一连接区241与极耳分离。
在一些实施例中，集流构件24为平板状结构。
平板状结构的集流构件24，对电池单体20的空间占用较小，有利于提升电池单体20的能量密度。
请参照图6，图6为本申请另一些实施例提供的集流构件24的结构示意图。在另一些实施例中，镂空区243包括间隔设置的第一镂空区域和第二镂空区域，第一镂空区域内设置有多个第一孔缝部2432，第二镂空区域内设置有多个第二孔缝部2433。第一镂空区域和第二镂空区域之间形成第二连接区242，通过设置多个第一孔缝部2432和多个第二孔缝部2433，使得位于第一镂空区域与第二镂空区域之间的第二连接区242更容易发生形变。在电极端子23受到应力时，应力不易传递至第一连接区 241，不易导致第一连接区241受到应力而移动，不易使第一连接区241与极耳分离，有利于提升电池单体20的寿命。更进一步地，第一镂空区域内的多个第一孔缝部2432的开口方向相同，且与第二镂空区域内设置的多个第二孔缝部2433的开口方向相反，这样在第二连接区242发生形变时，每相邻的两个第一孔缝部2432之间的部分扭曲方向一致，使得第二连接区242的形变阻力小，第二连接区242的所受的应力不易传递给第一连接区241。
请参照图7，图7为本申请又一些实施例提供的集流构件24的结构示意图。在又一些实施例中，孔缝部2431为直线形孔缝。
孔缝部2431是沿着直线轨迹延伸的孔缝结构。由于其沿着直线轨迹延伸，因此呈直线形，本申请称之为直线形孔缝。
请参照图3～图8，图8为本申请一些实施例提供的电池单体20的主视示意图。在一些实施例中，电池单体20包括两个电极端子23，两个电极端子23极性相反且分别设置于外壳22沿第一方向A相对的两端。每个电极端子23通过一个本申请上述实施例中提及的集流构件24与对应的极耳连接。
两个电极端子23分别位于外壳22沿第一方向A的两端。其中一个电极端子23与电池单体20的正极极耳电连接，构成电池单体20的正极。另一个电极端子23与电池单体20的负极极耳电连接，构成电池单体20的负极。
一个电极端子23通过一个集流构件24与对应的极耳连接。具体来说，一个电极端子23通过一个集流构件24与正极极耳电连接，构成电池单体20的正极。另一个电极端子23通过一个集流构件24与负极极耳电连接，构成电池单体20的负极。
通过设置两个电极端子23，一个电极端子23作为电池单体20的正极，另一个电极端子23作为电池单体20的负极。这样，电池单体20无需将壳体221作为电池单体20的负极，不易导致壳体221腐蚀，不易导致相邻的两个电池单体20之间发生短路。两个电极端子23分别通过一个本申请上述实施例中提及的集流构件24与对应的极耳连接，这样每个电极端子23在受到应力时，均不易传递至与其对应的集流构件24的第一连接区241上，不易导致第一连接区241移动，而使电极端子23与对应的极耳的连接失效。
请参照图3～图8，在一些实施例中，外壳22包括壳体221和端盖222，壳体221沿第一方向A的一端具有开口，端盖222封闭开口。一个电极端子23设置于壳体221，另一个电极端子23设置于端盖222。
通过在壳体221沿第一方向A的一端设置开口，便于在生产电池单体20时对电极组件21进行入壳操作(将电极组件21装入到壳体221的内部)，通过端盖222封闭开口，以将壳体221的内外隔绝，避免外界杂质对电池单体20造成损害。此时，将一个电极端子23设置于端盖222，另一个电极端子23设置于壳体221，生产制造方便，有利于降低生产成本。
请参照图9，图9为本申请另一些实施例提供的电池单体20的***图。在另一些实施例中，外壳22包括壳体221和两个端盖222，壳体221沿第一方向A的两端分别具有开口，两个端盖222封闭两个开口。两个电极端子23分别一一对应的设置于两个端盖222。
“两个电极端子23分别一一对应的设置于两个端盖222”是指一个电极端子23设置于一个端盖222，另一个电极端子23设置于另一个端盖222。
通过在壳体221沿第一方向A的两端均设置开口，便于在生产电池单体20时对电极组件21进行入壳操作(将电极组件21装入到壳体221的内部)，通过端盖 222封闭开口，以将壳体221的内外隔绝，避免外界杂质对电池单体20造成损害。此时，将两个电极端子23分别一一对应的设置于两个端盖222，生产制造方便，有利于降低生产成本。
请再次参照图8，在一些实施例中，沿第一方向A，电极端子23凸出于外壳22的部分的高度为H，外壳22的长度为L，满足：H/L≤0.02。
H表示电极端子23沿第一方向A凸出于外壳22的部分的高度。电极端子23设置于外壳22沿第一方向A的一端。电极端子23凸出于外壳22的部分的高度也可以理解为：沿第一方向A，外壳22设置该电极端子23的一端的端面与电极端子23位于外壳22外侧且远离该端面的表面之间的距离。
L为外壳22沿第一方向A的长度。H/L表示电极端子23沿第一方向A凸出于外壳22的部分的高度与外壳22沿第一方向A的长度之比，电极端子23沿第一方向A凸出于外壳22的部分的高度与外壳22沿第一方向A的长度之比的取值可以为：H/L＝0.02、0.018、0.015、0.012、0.01、0.008等。
电极端子23沿第一方向A凸出于外壳22的部分的高度不超过外壳22沿第一方向A的长度的0.02倍。这样，电极端子23沿第一方向A凸出于外壳22的部分的高度较小，对空间的占用较小，有利于提高电池100成组或者组装时对于空间的利用效率，进而提高能量密度。若H/L＞0.02，则电极端子23沿第一方向A凸出于外壳22的部分的高度较大，对空间的占用较大，不利于提高电池100成组或者组装时对于空间的利用效率。
在一些实施例中，H/L≤0.015。
电极端子23沿第一方向A凸出于外壳22的部分的高度与外壳22沿第一方向A的长度之比的取值可以为：H/L＝0.015、0.012、0.01、0.008、0.005等。
电极端子23沿第一方向A凸出于外壳22的部分的高度不超过外壳22沿第一方向A的长度的0.015倍。这样，电极端子23沿第一方向A凸出于外壳22的部分的高度较小，对空间的占用较小，有利于提高电池100成组或者组装时对于空间的利用效率。
在一些实施例中，外壳22为圆柱形，外壳22的外径为D。外壳22沿第一方向A的长度为L，满足：L/D≥2。
D表示圆柱形外壳22的外径。L/D表示外壳22的外径与外壳22沿第一方向A的长度为L之比。外壳22的外径与外壳22沿第一方向A的长度为L之比的取值可以为：L/D＝2、2.5、3、3.5、4、4.5、5等。
外壳22为圆柱形，电池单体20为圆柱电池单体20。将外壳22沿第一方向A的长度与外壳22的外径之比限制为大于或等于2，适用于卷绕形成的电极组件21，使得电极组件21易于装入外壳22内。
请参照图10和图11，图10为本申请一些实施例提供的电池单体20的俯视示意图。图11为图10中B-B位置的剖视图(第二端子部232围设于第一端子部231的外侧)。在一些实施例中，电极端子23包括材料不同的第一端子部231和第二端子部232，第一端子部231与第二端子部232连接。第一端子部231连接于集流构件24，第二端子部232安装于外壳22。
由于不同材质的熔点存在差异，导致异金属焊接难度大，同种材质的熔点相同，因此便于实现焊接。
第一端子部231是电极端子23上用于与集流构件24电连接的部分。第一端子部231的材质与集流构件24的材质相同。
第二端子部232是电极端子23上用于与汇流构件电连接的部分。第二端子部232安装于外壳22，以将电极端子23固定于外壳22上。第二端子部232的材质与汇流构件的材质相同。汇流构件可以为汇流排。
第一端子部231与第二端子部232连接，允许电流通过第一端子部231和第二端子部232，以便于输出或输入电池单体20的电能。
一般来说，极耳的材质和汇流构件的材质不同，而相同材料在焊接时较为容易。因此，可将集流构件24的材质设置为与极耳的材质相同，以便于集流构件24与极耳焊接。而将第一端子部231的材质设置为与集流构件24的材质相同，以便于第一端子部231与集流构件24焊接。将第二端子部232的材质设置为与汇流构件的材质相同，以便于第二端子部232与汇流构件焊接。
在一些实施例中，第一端子部231的材质为铜，第二端子部232的材质为铝，进而使得电极端子23成为复合端子，即通过不同材质的金属复合形成的端子结构。
一般来说，极耳的材质为铜，因此，第一端子部231的材质也设置为铜材质。汇流构件的材质为铝，因此，第二端子部232的材质也设置为铝。
请参照图11，在一些实施例中，第二端子部232围设于第一端子部231的外侧。
“第二端子部232围设于第一端子部231的外侧”可以理解为第二端子部232套设于第一端子部231的外侧，但第二端子部232的内表面与第一端子部231的外表面连接在一起。
第一端子部231位于电极端子23的中部位置，便于与集流构件24焊接。第二端子部232围设于第一端子部231的外侧，以便于安装于外壳22，并便于与汇流构件焊接。
密封件围设于第二端子部232的外侧，以将第二端子部232与外壳22密封。
请参照图11，在一些实施例中，第一端子部231形成有一空腔2311，空腔2311的一端开设开口。
在一些实施例中，第一端子部231形成有空腔2311，空腔2311具有开口，开口形成于第一端子部231背离电极组件21的一端。换句话说，空腔2311的开口背离电极组件21。
通过在第一端子部231形成一端开口的空腔2311，可以降低第一端子部231的重量，有利于降低电池单体20的重量，也可以节省材料，降低材料成本。
请参照图12，图12为图10中B-B位置的剖视图(在图11的基础上增加第三端子部233)。在一些实施例中，电极端子23包括第三端子部233，第三端子部233连接于第二端子部232并封闭开口，第三端子部233用于与汇流构件连接。
第三端子部233可以连接于第二端子部232背离电极组件21的一侧，以将形成于第一端子部231的空腔2311的开口封闭。第三端子部233可以用于与汇流构件焊接，以增大汇流构件与电极端子23的连接面积。可选地，第三端子部233的材质可以与汇流构件的材质相同，以便于第三端子部233和汇流构件焊接。
通过设置第三端子部233，一方面第三端子部233可以与汇流构件连接，增大电极端子23与汇流构件的连接面积，使电极端子23和汇流构件的连接更加方便。另一方面，第三端子部233封闭开口，能够避免电池单体20外的杂质聚集于空腔2311内。
请参照图13，图13为图10中B-B位置的剖视图(在图12的基础上增加抵接部2312)。在一些实施例中，为了进一步限位第一端子部231，第一端子部231的外周上凸设有抵接部2312，沿着第一方向A，抵接部2312抵接于第二端子部232朝向电极组件21的一端上，以降低第一端子部231沿第一方向A与第二端子部232分离的风险。
请参照图14，图14为图10中B-B位置的剖视图(第一端子部231和第二端子部232层叠设置)。在一些实施例中，沿第一方向A，第一端子部231和第二端子部232层叠设置，具体地，在一些实施例中，沿第一方向A，第一端子部231背离电极组件21的一端与第二端子部232朝向电极组件21的一端连接，进而形成沿第一方向层叠设置的结构。
“第一端子部231和第二端子部232层叠设置”也可以理解为第一端子部231和第二端子部232沿第一方向A堆叠。由于第一端子部231需要与集流构件24连接，因此，沿第一方向A，在电极组件21指向端盖222的方向上，第一端子部231和第二端子部232依次设置。并且，第一端子部231朝向第二端子部232的表面与第二端子部232的朝向第一端子部231的表面连接。
将第一端子部231和第二端子部232层叠设置，使得第一端子部231与集流构件24具有较大的连接面积，同时第二端子部232与汇流构件也具有较大的连接面积。
在一些将第一端子部231和第二端子部232层叠设置的实施例中，第二端子部232内部形成有空腔2311。
第二端子部232内部形成有空腔2311，空腔2311可以具有开口，也可以不具有开口。在图14所示的实施例中，空腔2311具有开口，开口形成于第二端子部232的背离第一端子部231的一端。
通过在第二端子部232内部形成空腔2311，可以降低第二端子部232的重量，有利于降低电池单体20的重量，也可节省材料，降低成本。
请参照图15，图15为图10中B-B位置的剖视图(在图14的基础上增加第三端子部233)。在一些实施例中，电极端子23包括第三端子部233，第三端子部233连接于第二端子部232并封闭第二端子部232内形成的空腔2311的开口，第三端子部233用于与汇流构件连接。通过设置第三端子部233，第三端子部233可以与汇流构件连接，增大电极端子23与汇流构件的连接面积，使电极端子23和汇流构件的连接更加方便。
在一些实施例中，电极端子23采用一种材质制成，集流构件24的第一连接区241和第二连接区242的材质不同。其中，第一连接区241的材质与极耳的材质相同，第二连接区242的材质与电极端子23的材质相同，以便于极耳与第一连接区241焊接，第二连接区242与电极端子23焊接。电极端子23的材质与汇流构件的材质相同，以便于电极端子23与汇流构件焊接。
同样的，在一些实施例中，除了对电极端子23进行不同材质的金属复合成型或者对集流构件24的第一连接区241和第二连接区242的材质进行不同设计外，在一些实施方式中，也可以将集流构件24的材质设置为一层铜材质一层铝材质的复合导电件结构，即呈片状的集流构件24包括相互连接的铜层和铝层；集流构件24的铜层与铜材质的极耳焊接连接，集流构件24的铝层与铝材质的电极端子焊接。
本申请实施例提供了一种电池100，电池100包括箱体10和上述的电池单体20，电池单体20容纳于箱体10内。
本申请实施例提供了一种用电设备，用电设备包括上述的电池单体20，电池单体20用于提供电能，或者包括上述的电池100，电池100用于提供电能。
根据本申请的一些实施例，请参照图3～图15。
本申请实施例提供了一种电池单体20，电池单体20包括电极组件21、外壳22、电极端子23和集流构件24。电极组件21具有极耳，外壳22用于容纳电极组件21。沿第一方向A，电极端子23设置于外壳22的一端。集流构件24设置有镂空区243，镂空区243将集流构件24划分为位于镂空区243的两侧第一连接区241和第二连接区242。第一连接区241与极耳连接，第二连接区242与电极端子23连接。镂空区243包括间隔设置的两个圆弧形孔缝部2431，孔缝部2431贯穿集流构件24厚度方向的两表面，集流构件24位于两个孔缝部2431之间的部分形成第二连接区242。
该电池单体20的集流构件24上设置有镂空区243，镂空区243将集流构件24划分为第一连接区241和第二连接区242，第一连接区241和第二连接区242分别与极耳和电极端子23连接。当电极端子23受到应力作用时，镂空区243的存在使第二连接区242能够相对于第一连接区241形变，使得应力不易传递至第一连接区241，不易导致第一连接区241受到应力而移动，不易使第一连接区241与极耳分离，有利于提升电池单体20的寿命。简而言之，在电极端子23受到应力时，不易导致集流构件24整个移动，而是第二连接区242相对于第一连接区241形变，使得第一连接区241不易与极耳分离，从而提高电池单体20的寿命。通过设置两个贯穿集流构件24厚度方向的两表面的孔缝部2431，使得位于两个孔缝部2431之间的第二连接区242易于发生形变，在电极端子23受到应力时，应力不易传递至第一连接区241，不易导致第一连接区241受到应力而移动，不易使第一连接区241与极耳分离，有利于提升电池单体20的寿命。另外，孔缝部2431易于成型，可降低集流构件24的生产成本。采用弧形的孔缝，使得第二连接区242更容易发生形变。
电池单体20包括两个电极端子23，两个电极端子23极性相反且分别设置于外壳22沿第一方向A相对的两端，每个电极端子23通过一个集流构件24与对应的极耳连接。通过设置两个电极端子23，一个电极端子23作为电池单体20的正极，另一个电极端子23作为电池单体20的负极。这样，电池单体20无需将壳体221作为电池单体20的负极，不易导致壳体221腐蚀，不易导致相邻的两个电池100之间发生短路。
外壳22包括壳体221和端盖222，壳体221沿第一方向A的一端具有开口，端盖222封闭开口，一个电极端子23设置于壳体221，另一个电极端子23设置于端盖222。通过在壳体221沿第一方向A的一端设置开口，便于在生产电池单体20时对电极组件21进行入壳操作(将电极组件21装入到壳体221的内部)，通过端盖222封闭开口，以将壳体221的内外隔绝，避免外界杂质对电池单体20造成损害。此时，将一个电极端子23设置于端盖222，另一个电极端子23设置于壳体221，生产制造方便，有利于降低生产成本。
外壳22包括壳体221和两个端盖222，壳体221沿第一方向A的两端分别具有开口，两个端盖222封闭两个开口，两个电极端子23分别一一对应的设置于两个端盖222。通过在壳体221沿第一方向A的两端均设置开口，便于在生产电池单体20时对电极组件21进行入壳操作(将电极组件21装入到壳体221的内部)，通过端盖222封闭开口，以将壳体221的内外隔绝，避免外界杂质对电池单体20造成损害。此时，将两个电极端子23分别一一对应的设置于两个端盖222，生产制造方便，有利于降低生产成本。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (20)

  1. 一种电池单体，其中，包括：
    电极组件，具有极耳；
    外壳，用于容纳所述电极组件；
    电极端子，沿第一方向，所述电极端子设置于所述外壳的一端；
    集流构件，设置有镂空区，所述镂空区将所述集流构件划分为位于所述镂空区的两侧第一连接区和第二连接区，所述第一连接区与所述极耳连接，所述第二连接区与所述电极端子连接。
  2. 根据权利要求1所述电池单体，其中，所述镂空区包括间隔设置的两个孔缝部，所述孔缝部贯穿所述集流构件厚度方向的两表面，所述集流构件位于两个所述孔缝部之间的部分形成所述第二连接区。
  3. 根据权利要求2所述电池单体，其中，所述孔缝部为弧形孔缝。
  4. 根据权利要求3所述电池单体，其中，两个所述孔缝部的开口相背设置。
  5. 根据权利要求1-4任一项所述电池单体，其中，所述集流构件为平板状结构。
  6. 根据权利要求1-5任一项所述电池单体，其中，所述电池单体包括两个所述电极端子，两个所述电极端子极性相反且分别设置于所述外壳沿第一方向相对的两端，每个所述电极端子通过一个所述集流构件与对应的所述极耳连接。
  7. 根据权利要求6所述电池单体，其中，所述外壳包括壳体和端盖，所述壳体沿所述第一方向的一端具有开口，所述端盖封闭所述开口，一个所述电极端子设置于所述壳体，另一个所述电极端子设置于所述端盖。
  8. 根据权利要求6所述电池单体，其中，所述外壳包括壳体和两个端盖，所述壳体沿所述第一方向的两端分别具有开口，两个所述端盖封闭两个所述开口，两个所述电极端子分别一一对应的设置于两个所述端盖。
  9. 根据权利要求1-8任一项所述电池单体，其中，沿所述第一方向，所述电极端子凸出于所述外壳的部分的高度为H，所述外壳的长度为L，满足：H/L≤0.02。
  10. 根据权利要求9所述电池单体，其中，H/L≤0.015。
  11. 根据权利要求1-10任一项所述电池单体，其中，所述外壳为圆柱形，所述外壳的外径为D，所述外壳沿所述第一方向的长度为L，满足：L/D≥2。
  12. 根据权利要求1-11任一项所述电池单体，其中，所述电极端子包括材料不同的第一端子部和第二端子部，所述第一端子部与所述第二端子部连接，所述第一端子部连接于所述集流构件，所述第二端子部安装于所述外壳。
  13. 根据权利要求12所述电池单体，其中，所述第一端子部的材质为铜，所述第二端子部的材质为铝。
  14. 根据权利要求12所述电池单体，其中，所述第二端子部围设于所述第一端子部的外侧。
  15. 根据权利要求14所述电池单体，其中，所述第一端子部形成有一端开口的空腔。
  16. 根据权利要求15所述电池单体，其中，所述电极端子包括第三端子部，所述第三端子部连接于所述第二端子部并封闭所述开口，所述第三端子部用于与汇流构件连接。
  17. 根据权利要求12所述电池单体，其中，沿所述第一方向，所述第一端子部 和所述第二端子部层叠设置。
  18. 根据权利要求17所述电池单体，其中，所述第二端子部内部形成有空腔。
  19. 一种电池，其中，包括：
    箱体；
    根据权利要求1-18任一项所述的电池单体，所述电池单体容纳于所述箱体内。
  20. 一种用电设备，其中，包括根据权利要求1-18任一项所述的电池单体，所述电池单体用于提供电能，或者包括根据权利要求19所述的电池，所述电池用于提供电能。
PCT/CN2022/116250 2022-08-31 2022-08-31 电池单体、电池及用电设备 WO2024045058A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/116250 WO2024045058A1 (zh) 2022-08-31 2022-08-31 电池单体、电池及用电设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/116250 WO2024045058A1 (zh) 2022-08-31 2022-08-31 电池单体、电池及用电设备

Publications (1)

Publication Number Publication Date
WO2024045058A1 true WO2024045058A1 (zh) 2024-03-07

Family

ID=90099991

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/116250 WO2024045058A1 (zh) 2022-08-31 2022-08-31 电池单体、电池及用电设备

Country Status (1)

Country Link
WO (1) WO2024045058A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004139777A (ja) * 2002-10-16 2004-05-13 Matsushita Electric Ind Co Ltd 円筒型二次電池
CN1694287A (zh) * 2004-05-04 2005-11-09 三星Sdi株式会社 具有集电板和电极组件的蓄电池
DE102021006016A1 (de) * 2021-12-06 2022-01-20 Daimler Ag Rundzelle für einen elektrischen Energiespeicher eines Kraftfahrzeugs, insbesondere eines Kraftwagens
CN114678662A (zh) * 2022-03-02 2022-06-28 深圳市比克动力电池有限公司 一种电池
CN216928872U (zh) * 2022-01-25 2022-07-08 江苏正力新能电池技术有限公司 集流盘及圆柱电池
CN114824413A (zh) * 2021-01-19 2022-07-29 株式会社Lg新能源 电池及应用于电池的集电体、包括集电体的电池组及汽车

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004139777A (ja) * 2002-10-16 2004-05-13 Matsushita Electric Ind Co Ltd 円筒型二次電池
CN1694287A (zh) * 2004-05-04 2005-11-09 三星Sdi株式会社 具有集电板和电极组件的蓄电池
CN114824413A (zh) * 2021-01-19 2022-07-29 株式会社Lg新能源 电池及应用于电池的集电体、包括集电体的电池组及汽车
DE102021006016A1 (de) * 2021-12-06 2022-01-20 Daimler Ag Rundzelle für einen elektrischen Energiespeicher eines Kraftfahrzeugs, insbesondere eines Kraftwagens
CN216928872U (zh) * 2022-01-25 2022-07-08 江苏正力新能电池技术有限公司 集流盘及圆柱电池
CN114678662A (zh) * 2022-03-02 2022-06-28 深圳市比克动力电池有限公司 一种电池

Similar Documents

Publication Publication Date Title
WO2023092758A1 (zh) 电池单体及其制造方法和制造设备、电池以及用电设备
WO2024027034A1 (zh) 端盖组件、电池单体、电池以及用电装置
CN216213945U (zh) 电池单体、电池和用电装置
US20240055646A1 (en) Wound electrode assembly, battery cell, battery, and electrical device
CN216085074U (zh) 端盖组件、电池单体、电池及用电设备
US20240055705A1 (en) Battery cell, battery, power consuming apparatus, and method and apparatus for manufacturing battery cell
WO2023216829A1 (zh) 电池单体、电池及用电装置
EP4391183A1 (en) End cover, battery cell, battery, and electric apparatus
WO2023220881A1 (zh) 端盖、电池单体、电池及用电设备
WO2023082155A1 (zh) 电池单体及其制造方法和制造***、电池以及用电装置
WO2024045058A1 (zh) 电池单体、电池及用电设备
WO2024016272A1 (zh) 电池单体及其制造方法、电池以及用电装置
US20240106039A1 (en) Battery cell, battery, electrical device, and method and device for manufacturing battery cell
WO2024016351A1 (zh) 端盖组件、电池单体、电池及用电设备
WO2024021085A1 (zh) 端盖组件、电池组件、电池及用电设备
WO2023092459A1 (zh) 电极组件、电池单体、电池以及用电装置
US20230369728A1 (en) Electrode assembly, method and system for manufacturing same, battery cell, battery, and electric apparatus
WO2023184110A1 (zh) 外壳、电池单体、电池及用电设备
EP4354576A1 (en) Battery cell and manufacturing method and system therefor, battery and electric device
WO2024020766A1 (zh) 电池单体、电池、用电装置及电池单体的制造方法
WO2023206451A1 (zh) 电池单体、电池及用电设备
US20240162579A1 (en) Battery cell, method and system for manufacturing battery cell, battery and electrical apparatus
WO2023245430A1 (zh) 电池单体、电池及用电设备
CN217719895U (zh) 电池单体、电池以及用电装置
WO2023178600A1 (zh) 集流构件、电池单体、电池及用电设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22956887

Country of ref document: EP

Kind code of ref document: A1