WO2024055312A1 - 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

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Publication number
WO2024055312A1
WO2024055312A1 PCT/CN2022/119423 CN2022119423W WO2024055312A1 WO 2024055312 A1 WO2024055312 A1 WO 2024055312A1 CN 2022119423 W CN2022119423 W CN 2022119423W WO 2024055312 A1 WO2024055312 A1 WO 2024055312A1
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WO
WIPO (PCT)
Prior art keywords
support member
battery cell
main body
cell according
end cover
Prior art date
Application number
PCT/CN2022/119423
Other languages
English (en)
French (fr)
Inventor
周文林
徐良帆
张倩倩
李全坤
王鹏
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 CN202280087324.6A priority Critical patent/CN118476073A/zh
Priority to PCT/CN2022/119423 priority patent/WO2024055312A1/zh
Publication of WO2024055312A1 publication Critical patent/WO2024055312A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs

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, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, battery safety also needs to be considered. However, in the scenario where the cells are inverted, the safety of the battery cells is poor.
  • 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 in related technologies that battery cells are less safe when the cells are inverted.
  • inventions of the present application provide a battery cell.
  • the battery cell includes a casing, an electrode assembly, an end cap assembly and a support.
  • the casing has an opening;
  • the electrode assembly has a main body and a support.
  • the pole lug protrudes from the main body, and the electrode assembly is accommodated in the housing;
  • the end cover assembly covers the opening;
  • the support member is located in the housing, and the pole lug surrounds The support member is bent; wherein the support member is connected to the end cover assembly to fix the support member.
  • the battery cell is provided with a support member, and the tabs are bent around the support member.
  • the support member can support the main body, so that the gravity of the main body is not easily transferred to the tabs. It is not easy to cause the tabs to bifurcate and insert, which improves the safety of the battery cells.
  • the support member is connected to the end cover assembly, so that the support member does not move up and down in the housing and does not drive the pole tabs that are bent around the support member to move, which is conducive to maintaining the shape of the pole tabs and preventing the pole tabs from being moved. Damage occurs.
  • the support member is detachably connected to the end cover assembly.
  • the support member is detachably connected to the end cover assembly, which facilitates the maintenance of the battery cells and the recycling of the support members after the battery cells are scrapped.
  • the end cover assembly includes a first hook part
  • the support member includes a second hook part
  • the first hook part and the second hook part The parts are correspondingly arranged and hooked together to restrict the movement of the support member in a direction close to the main body part.
  • the connection is relatively simple and convenient, and the support member can be restricted from moving in the direction close to the main body, and the support member can be restrained from moving in the direction close to the main body. That is to say, the pole tabs bent around the support member are restricted from moving in a direction closer to the main body, thereby preventing the pole tabs from being inserted into the main body and causing a short circuit.
  • the support member abuts the end cover assembly in a direction away from the main body part.
  • the support member by making the support member abut against the end cover assembly in a direction away from the main body, the movement of the support member in a direction away from the main body is restricted, ensuring that the support member can stably support the main body, so that the gravity of the main body is not easily Passed to the pole lug, it is not easy to cause the pole lug to bifurcate and interpolate.
  • the support further includes a body part, and the tabs are bent around the body part;
  • the second hook part includes an extension part and a stop part, Along the thickness direction of the end cap assembly, the extension portion extends from the body portion in a direction away from the electrode assembly, and the stop portion is connected to an end of the extension portion away from the electrode assembly, and the The stopper is used to cooperate with the first buckle part.
  • the extension part extends from the body part in a direction away from the electrode assembly, and the stop part is connected to an end of the extension part away from the electrode assembly, and the extension part can be deformed when it is engaged with the first hook part. , thereby allowing the first hooking part to extend between the stopper part and the body part, so that the stopper part is hooked and matched with the first hooking part.
  • the stopper portion can resist the first hooking portion to limit the movement of the support member in a direction closer to the main body portion.
  • the size of the stop portion protruding from the extension portion is L1, which satisfies: L1>0.6mm; the first direction is perpendicular to the The thickness direction.
  • the stop portion by making the stop portion protrude beyond the extension portion by more than 0.6 mm, the stop portion has sufficient area to resist the first hook portion, thereby lifting the first hook portion and the second hook portion.
  • the stability of the buckle hanging buckle fit When L ⁇ 0.6mm, the area where the stopper part and the first hook part resist is small.
  • the body part is provided with a through hole; along the thickness direction, the projection of the stopper part on the body part at least partially falls within the through hole; Or the stop portion protrudes from the extension portion along the first direction, the through hole is located on one side of the extension portion along the second direction, and the first direction, the second direction and the thickness direction are both Two vertical.
  • the strength of the body part near the second hook part is weakened, which is conducive to the deformation of the body part when the first hook part and the second hook part are hooked together, thereby making it easier to attach the The first hooking part and the second hooking part are hooked together.
  • through-holes can also reduce stress concentration and optimize the stress received by the support.
  • the through hole can also be formed simultaneously with the stopper by injection molding, and demoulding is facilitated.
  • a first slope is formed on an end of the first hooking portion facing the main body portion
  • a third slope is formed on an end of the stopper portion away from the main body portion.
  • the first inclined surface and the second inclined surface when the first hooking part and the second hooking part are hooked together, the first inclined surface and the second inclined surface resist, and the stopper part is along the first
  • the inclined surface moves relative to the first hooking part.
  • the extension part Under the resistance of the first inclined surface, the extension part gradually deforms.
  • the second inclined surface breaks away from the first inclined surface.
  • the stop part After the stop part moves for a certain distance in the direction away from the electrode assembly, The deformation of the extension part is restored, the stop part resists the first hook part, and the first hook part and the second hook part are hooked together.
  • the first inclined surface and the second inclined surface cooperate with each other to guide the second hooking part to cooperate with the first hanging part, so that the second hanging part and the first hanging part are The buckle hook makes it easier to fit.
  • the body part has a first surface
  • the extension part is connected to the first surface
  • the stop part has a function for connecting with the first hook part.
  • the abutting second surface faces the first surface along the thickness direction, and the distance between the second surface and the first surface is L2, which satisfies L2>1.5mm.
  • the extension part has a sufficient length to facilitate the extension part to be hooked and matched between the first hooking part and the second hooking part. deformation occurs, thereby making it easier for the first hooking part and the second hooking part to cooperate with each other. If L2 ⁇ 1.5 mm, the extension part is not easily deformed, making it difficult for the second hook part to snap into the first hook part.
  • the body part has an opposite first end and a second end, and both the first end and the second end are provided with the first end.
  • Two hanging parts; the first direction is perpendicular to the thickness direction.
  • the first hooking parts are provided on the end cover assembly, and the first hooking parts at multiple positions are provided.
  • the second hook part cooperates with the first hook part to help improve the stability of the support member being connected to the end cover assembly, thereby ensuring that the support member is not easily separated from the end cover assembly, so that the support member does not move up and down in the housing. , which is helpful to maintain the shape of the pole lug and avoid damage when the pole lug is driven.
  • the first end is provided with a plurality of the second hook parts at intervals
  • the second end is provided with a plurality of the second hook parts at intervals.
  • the distance between the two adjacent second hook portions located at the first end is D1
  • the distance between the two adjacent second hook portions located at the second end is D2.
  • the difference between the distance between the two adjacent second hooking parts located at the first end and the distance between the two adjacent second hooking parts located at the second end is greater than 2 mm, so as to lift the Anti-fool effect. If D1-D2 ⁇ 2mm, when the support is forcibly installed incorrectly, the support or end cover assembly may be deformed, resulting in the installation being successful even when the support is forcibly installed incorrectly.
  • the second hook portion located at the first end and the second hook portion located at the second end are arranged back to back or facing each other.
  • the support member when the second hook portion located at the first end and the second hook portion located at the second end are arranged back to back, the support member is assembled to the end cover assembly, and the first hook portion located at the first end is The buckle part and the second hook part located at the second end are deformed in opposite directions, and are not easy to separate from the end cover assembly after installation.
  • the support member is assembled on the end cover assembly, then the first hook portion at the first end and the second hook portion at the second end are The second hook portion is deformed in opposite directions and is not easy to detach from the end cover assembly after installation.
  • the support member and the end cover assembly are heat-melted or laser welded.
  • the end cover assembly includes an end cover and an insulating member.
  • the insulating member is located on the side of the end cover facing the main body.
  • the insulating member is used for insulation.
  • the electrode assembly and the end cap are isolated; the support member is connected to the insulating member.
  • the end cover is provided with a pressure relief mechanism
  • the insulating member is formed with a protrusion protruding in a direction facing the electrode assembly at a position corresponding to the pressure relief mechanism.
  • the support member is provided with a groove, and the protruding portion is at least partially accommodated in the groove.
  • the protrusion is accommodated in the groove, and the protrusion cooperates with the groove to limit the position of the support member and prevent the support member from moving in the housing.
  • the protruding portion abuts against the bottom surface of the groove.
  • the depth of the groove is H, satisfying: H>0.5mm.
  • the groove and the protruding portion have sufficient matching depth, thereby improving the limiting effect on the support, so that even if it is subject to a certain degree of external impact, it will not This will cause the protrusion to disengage from the groove.
  • the maximum gap between the groove side of the groove and the outer peripheral surface of the protrusion is D3, which satisfies: 0 ⁇ D3 ⁇ 10mm.
  • the end cover assembly includes a pressure relief mechanism.
  • a region on the support member corresponding to the pressure relief mechanism is provided with a pressure relief mechanism. There are multiple vents.
  • multiple exhaust holes are provided on the support member to allow the gas inside the battery cell to flow to the pressure relief mechanism through the exhaust holes, so that when the pressure in the battery cell reaches the burst pressure, it is released through the pressure relief mechanism. pressure.
  • the area of the plurality of exhaust holes is S1
  • the area of the pressure relief mechanism is S2, and S1/S2 ⁇ 0.5 is satisfied.
  • the gas in the battery cell can flow smoothly through the exhaust holes to the pressure relief mechanism, so as to reduce the pressure in the battery cell. Quickly relieve pressure when burst pressure is reached.
  • the plurality of exhaust holes are evenly distributed within the projection range of the pressure relief mechanism on the support member.
  • a plurality of exhaust holes are evenly distributed within the projection range of the pressure relief mechanism on the support along the thickness direction, which is conducive to the smooth flow of gas in the battery cell to the pressure relief mechanism through the exhaust holes.
  • the end cover assembly is provided with a first liquid injection hole
  • the support member is provided with a second liquid injection hole
  • the second liquid injection hole is connected to the The position of the first liquid injection hole is corresponding.
  • liquid injection is facilitated by providing the first liquid injection hole and the second liquid injection hole.
  • the second liquid injection hole is arranged offset from the center position of the support member.
  • the second liquid injection hole By arranging the second liquid injection hole away from the center of the support member, when the support member is installed on the end cover assembly, the second liquid injection hole can play a foolproof role and reduce the installation cost to a certain extent. Risk of being wrong.
  • embodiments of the present application further provide a battery, which includes a box and the above-mentioned battery cell, and the battery cell is accommodated in the box.
  • the end cover assembly is provided on a side of the battery cell close to the bottom wall of the box.
  • embodiments of the present application further provide an electrical device, where the electrical device includes the above-mentioned battery, and 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 an exploded view of a battery cell provided by some embodiments of the present application.
  • Figure 4 is a schematic structural diagram of a battery cell provided by some embodiments of the present application.
  • Figure 5 is a schematic top view of a battery cell provided by some embodiments of the present application.
  • Figure 6 is a cross-sectional view at position A-A in Figure 5;
  • Figure 7 is an enlarged view of position B in Figure 6;
  • Figure 8 is an enlarged view of position C in Figure 6;
  • Figure 9 is a schematic structural diagram of a support provided by some embodiments of the present application.
  • Figure 10 is an enlarged view of position E in Figure 9;
  • Figure 11 is a schematic structural diagram of a support member provided by other embodiments of the present application.
  • Figure 12 is an enlarged view of position F in Figure 11;
  • Figure 13 is a schematic top view of a support provided by some embodiments of the present application.
  • Figure 14 is a cross-sectional view of the position G-G in Figure 13;
  • Figure 15 is a schematic structural diagram of a support provided by some embodiments of the present application.
  • Figure 16 is an enlarged view of the H position in Figure 15;
  • Figure 17 is an enlarged view of position I in Figure 15;
  • Figure 18 is a schematic top view of a support provided by some embodiments of the present application.
  • Figure 19 is a cross-sectional view at the J-J position in Figure 18;
  • Figure 20 is a schematic top view of the end cap assembly and support provided by other embodiments of the present application.
  • Figure 21 is a cross-sectional view at the K-K position in Figure 20;
  • Figure 22 is an enlarged view of the L position in Figure 21;
  • Figure 23 is an enlarged view of position D in Figure 6.
  • Icon 10-box; 11-first part; 12-second part; 20-battery cell; 21-end cover assembly; 211-end cover; 212-pressure relief mechanism; 213-electrode terminal; 214-first Liquid injection hole; 215-insulation piece; 2151-first hook part; 21511-first bevel; 2152-connection surface; 2153-protruding part; 22-electrode assembly; 221-main part; 222-pole lug; 23 - Shell; 24-support member; 240-first end; 241-second hook part; 2411-extension part; 2412-stop part; 24121-second slope; 24122-second surface; 242-body part ; 2421-first surface; 243-resistance part; 244-through hole; 245-reinforcement part; 246-groove; 247-exhaust hole; 248-second injection hole; 249-second end; 25- Adapter; 100-battery; 200-controller; 300-motor; 1000-vehi
  • 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.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square battery cells and soft-pack battery cells, 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 positron 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 serves as the negative sub-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 sub-lugs is multiple and stacked together, and the number of negative sub-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.
  • Batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. As battery application fields continue to expand, its market demand is also expanding.
  • the battery cell includes an electrode assembly, and the electrode assembly is a component in the battery cell that undergoes electrochemical reactions.
  • the electrode assembly is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and usually there is an isolation film between the positive electrode sheets and the negative electrode sheets.
  • the parts of the positive electrode sheet and the negative electrode sheet with active material constitute the main body of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active material respectively constitute sub-lugs.
  • the number of sub-lugs is Multiple and stacked together to form pole ears.
  • the tabs are located below the main body, and the tabs will be affected by the gravity of the main body.
  • the tabs are formed by stacking multiple sub-tabs, they are prone to bifurcation when affected by gravity.
  • the bifurcated parts are easily inserted into the main body and come into contact with the positive or negative electrode tabs in the main body, causing a short circuit and serious consequences. It may cause fire or even explosion, resulting in poor safety of battery cells.
  • embodiments of the present application provide a battery cell.
  • a support member is provided in the battery cell.
  • the tabs are bent around the support member.
  • the support member can support the main body so that the main body is The gravity is not easily transmitted to the tabs, and it is not easy to cause the tabs to bifurcate and insert (the tabs bifurcate and insert into the main body), which improves the safety of the battery cells.
  • the support member is connected to the end cover assembly, so that the support member does not move up and down in the housing and does not drive the pole tabs that are bent around the support member to move, which is conducive to maintaining the shape of the pole tabs and preventing the pole tabs from being moved. Damage occurs.
  • 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 electric equipment is the 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 .
  • 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 an exploded view of the battery cell 20 provided in some embodiments of the present application.
  • FIG. 4 is a schematic structural diagram of a battery cell 20 provided by some embodiments of the present application.
  • FIG. 5 is a schematic top view of a battery cell 20 provided in some embodiments of the present application.
  • Figure 6 is a cross-sectional view at position A-A in Figure 5 .
  • Figure 7 is an enlarged view of position B in Figure 6.
  • Figure 8 is an enlarged view of position C in Figure 6.
  • the embodiment of the present application provides a battery cell 20.
  • the battery cell 20 includes a case 23, an electrode assembly 22, an end cap assembly 21 and a support member 24.
  • the housing 23 has an opening.
  • the electrode assembly 22 has a main body 221 and tabs 222 protruding from the main body 221.
  • the electrode assembly 22 is accommodated in the housing 23, and the end cap assembly 21 covers the opening.
  • the support member 24 is located in the housing 23 , and the tabs 222 are bent around the support member 24 .
  • the support member 24 is connected to the end cover assembly 21 to fix the support member 24 .
  • the end cover assembly 21 includes an end cover 211.
  • the end cover 211 refers to a component that covers the opening of the housing 23 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap 211 may be adapted to the shape of the housing 23 to fit the housing 23 .
  • the end cap 211 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 211 is less likely to deform when subjected to extrusion and collision, so that the battery cell 20 can have higher durability. Structural strength and safety performance can also be improved.
  • the end cap 211 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 end cap assembly 21 further includes an electrode terminal 213 disposed on the end cap 211 .
  • the electrode terminal 213 may be used to electrically connect with the electrode assembly 22 for outputting or inputting electrical energy of the battery cell 20 .
  • the end cover assembly 21 also includes a pressure relief mechanism 212.
  • the pressure relief mechanism 212 is provided on the end cover 211.
  • the pressure relief mechanism 212 is used to open when the internal pressure or temperature of the battery cell 20 reaches the detonation pressure to release. The internal pressure of the battery cell 20.
  • the end cap assembly 21 further includes an insulator 215 disposed inside the end cap 211 .
  • the insulator 215 can be used to isolate the electrical connection components in the housing 23 from the end cap 211 to reduce short circuits. risks of.
  • the insulating member 215 may be plastic, rubber, or the like.
  • the housing 23 is a component used to cooperate with the end cover 211 to form an internal environment of the battery cell 20 , wherein the formed internal environment can be used to accommodate the electrode assembly 22 , the electrolyte, and other components.
  • the housing 23 and the end cover 211 may be independent components, and an opening may be provided on the housing 23.
  • the end cover 211 covers the opening at the opening to form the internal environment of the battery cell 20.
  • the end cover 211 and the housing 23 can also be integrated. Specifically, the end cover 211 and the housing 23 can form a common joint surface before other components are put into the housing. When it is necessary to encapsulate the inside of the housing 23 When, the end cover 211 is closed with the housing 23 again.
  • the housing 23 can be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 23 can be determined according to the specific shape and size of the electrode assembly 22 .
  • the housing 23 can 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 22 is a component in the battery cell 20 where electrochemical reactions occur.
  • One or more electrode assemblies 22 may be contained within the housing 23 .
  • the electrode assembly 22 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 portion 221 of the electrode assembly 22, and the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material each constitute sub-lugs. In order to ensure that large currents can pass through without melting, the number of sub-lugs is multiple and they are stacked together to form the tabs 222 .
  • the positive electrode tab and the negative electrode tab may be located together at one end of the main body part 221 or respectively located at both ends of the main body part 221 .
  • the positive active material and the negative active material react with the electrolyte, and the tabs 222 are connected to the electrode terminals 213 to form a current loop.
  • the tabs 222 protrude from the main body 221 to facilitate connection with the electrode terminals 213 to output electric energy from the battery cell 20 or to input electric energy into the battery cell 20 .
  • the support member 24 is located in the housing 23 and on a side of the main body 221 facing the end cover assembly 21 . In the scenario where the battery core is inverted, the support member 24 can support the main body 221 so that the gravity of the main body 221 is not easily transferred to the tabs 222 .
  • the pole tab 222 is bent around the support member 24 means that the pole tab 222 starts from the side of the support member 24 facing the main body 221, forms a bend at the edge of the support member 24, and extends to the distance away from the support member 24.
  • One side of the main body 221 Please refer to FIGS. 6 and 7 .
  • the battery cell 20 includes an adapter 25 .
  • the adapter 25 connects the portion of the lug 222 located on the side of the support 24 away from the main body 221 and the electrode terminal 213 , to electrically connect the tab 222 with the electrode terminal 213.
  • the pole tabs 222 are bent around the support member 24.
  • the positive pole tabs may be bent around the support member 24, or the negative pole tabs may be bent around the support member 24. It is also possible that both the positive electrode tab and the negative electrode tab are bent around the support member 24 .
  • the pole tabs 222 are bent around the support member 24, and the pole tabs 222 may be in contact with the end of the support member 24, or may not be in contact.
  • the support member 24 is connected to the end cover assembly 21 to fix the support member 24" means that the support member 24 is connected to the end cover assembly 21 so that the movement of the support member 24 is restricted.
  • the support member 24 cannot move or rotate relative to the end cover assembly 21 , that is, the relative position of the support member 24 and the end cover assembly 21 is fixed.
  • the support member 24 can be fixedly connected to the end cover assembly 21, such as welding. However, it is not limited to the fixed connection between the support member 24 and the end cover assembly 21.
  • the connection method between the support member 24 and the end cover 211 only needs to ensure that the relative positions of the support member 24 and the end cover assembly 21 are fixed when the battery cell 20 is used.
  • the battery cell 20 is provided with a support 24, and the tabs 222 are bent around the support 24.
  • the support 24 can support the main body 221, so that the gravity of the main body 221 is not easily transferred to the poles.
  • the lug 222 will not easily cause the pole lug 222 to bifurcate and insert, thereby improving the safety of the battery cell 20 .
  • the support member 24 is connected to the end cover assembly 21 so that the support member 24 does not move up and down in the housing 23 and does not move the tabs 222 bent around the support member 24, which is beneficial to maintaining the tabs 222. shape to avoid damage to the pole lug 222 when it is driven.
  • support 24 is removably connected to end cap assembly 21 .
  • Detachable connection means that after the support member 24 is connected to the end cover assembly 21, during normal operation, the relative positions of the two are fixed and will not be separated.
  • the support member 24 can be separated from the end cover assembly 21 by certain means as needed.
  • the support 24 may be threadedly connected to the end cap assembly 21 .
  • the support member 24 can be snap-connected with the end cover assembly 21 .
  • the end cap assembly 21 includes a first hook portion 2151
  • the support member 24 includes a second hook portion 241 .
  • the first hooking portion 2151 and the second hooking portion 241 are provided correspondingly and hooked together to restrict the support member 24 from moving in a direction close to the main body portion 221 .
  • At least one of the first hanging portion 2151 and the second hanging portion 241 is formed with a hook-like structure.
  • the first hanging portion 2151 and the second hanging portion 241 are hooked together, the first hanging portion 2151 and the second hanging portion 241 are hooked together.
  • the two hooking parts 241 are hooked together so that the support member 24 cannot move toward the main body part 221 .
  • first hanging portion 2151 and the second hanging portion 241 are provided correspondingly, which means that one first hanging portion 2151 is provided with at least one second hanging portion 241, and the position of the second hanging portion 241 must be consistent with the first hanging portion 241.
  • the position of the hook part 2151 matches, so that when the support member 24 is installed, the second hook part 241 can be hooked on the first hook part 2151.
  • the end cover assembly 21 and the support member 24 are hooked together, and the connection is simple and convenient, and the support member 24 can be restricted from moving in the direction close to the main body 221, and That is, the tab 222 bent around the support member 24 is restricted from moving in a direction closer to the main body 221 , thereby preventing the tab 222 from being inserted into the main body 221 and causing a short circuit.
  • the support member 24 abuts the end cap assembly 21 in a direction away from the main body portion 221 .
  • a resisting portion 243 protrudes from the side of the support member 24 away from the main body 221 .
  • the resisting portion 243 abuts held by the end cap assembly 21.
  • the resisting portion 243 may extend along the edge of the support member 24 to form a larger resisting area for resisting the end cap assembly 21 .
  • the support member 24 By making the support member 24 abut against the end cover assembly 21 in a direction away from the main body portion 221 , the support member 24 is restricted from moving in a direction away from the main body portion 221 , ensuring that the support member 24 can stably support the main body portion 221 , so that the main body portion 221 Gravity is not easily transmitted to the pole lug 222, and it is difficult to cause the pole lug 222 to bifurcate and insert.
  • the first hooking portion 2151 and the second hooking portion 241 cooperate with each other to restrict the movement of the support member 24 in the direction closer to the main body portion 221.
  • the support member 24 abuts the end cover assembly 21 in the direction away from the main body portion 221, and The support member 24 is restricted from moving in a direction away from the main body portion 221 .
  • the support member 24 can neither move toward the main body portion 221 nor move away from the main body portion 221, so that the support member 24 will not move up and down in the housing 23, and will not drive the pole tabs 222 bent around the support member 24 to move. It is beneficial to maintain the shape of the tab 222 and avoid damage when the tab 222 is driven.
  • the support member 24 further includes a body portion 242 , and the tabs 222 are bent around the body portion 242 .
  • the second hook part 241 includes an extension part 2411 and a stop part 2412. Along the thickness direction of the end cap assembly 21 , the extension portion 2411 extends from the body portion 242 in a direction away from the electrode assembly 22 .
  • the stopper 2412 is connected to an end of the extension 2411 away from the electrode assembly 22 , and the stopper 2412 is used to engage with the first hooking part 2151 .
  • the thickness direction of the end cap assembly 21 is in the same direction as the thickness direction of the end cap 211 . Please refer to Figure 8.
  • the thickness direction is the Z direction shown in Figure 8.
  • the body portion 242 is the main part of the support member 24.
  • the body portion 242 is used for winding the tabs 222, and can also support the body portion 221 when the battery core is inverted.
  • a reinforcing part 245 is provided on the body part 242 .
  • the reinforcing portion 245 may be a reinforcing rib or reinforcing rib protruding from the body portion 242 .
  • the extension portion 2411 is a portion of the second hook portion 241 that connects the stopper portion 2412 and the main body portion 242 .
  • the extension portion 2411 extends from the body portion 242 in a direction away from the electrode assembly 22 , and the stopper portion 2412 and the body portion 242 are respectively located at both ends of the extension portion 2411 .
  • a space for the first hooking portion 2151 to extend is formed between the stopper portion 2412 and the body portion 242 .
  • the stop portion 2412 and the extension portion 2411 form a hook-like structure.
  • the stop portion 2412 can resist the first hook portion 2151 so that the support member 24 cannot move toward the main body 221 .
  • the extension part 2411 extends from the body part 242 in a direction away from the electrode assembly 22, and the stopper part 2412 is connected to an end of the extension part 2411 away from the electrode assembly 22.
  • the extension part 2411 can be engaged with the first hook part 2151.
  • the deformation occurs, thereby allowing the first hooking portion 2151 to extend between the stopper portion 2412 and the body portion 242, so that the stopper portion 2412 engages with the first hooking portion 2151.
  • the stopper portion 2412 can resist the first hook portion 2151 to limit the movement of the support member 24 in a direction closer to the main body portion 221 .
  • the size of the stop portion 2412 protruding from the extension portion 2411 is L1, which satisfies: L1>0.6 mm.
  • the first direction is perpendicular to the thickness direction.
  • the first direction is the direction in which the stopper portion 2412 protrudes from the extension portion 2411, and the first direction is also a direction perpendicular to the thickness direction. Referring to FIG. 8 , the first direction may be the X direction shown in FIG. 8 .
  • L1 represents the size of the stopper 2412 protruding from the extension 2411 along the first direction, that is, along the first direction, between the surface of the stopper 2412 away from the extension 2411 and the surface of the stopper 2412 facing the extension 2411 distance.
  • the stopper 2412 By making the size of the stopper 2412 protruding from the extension part 2411 exceed 0.6 mm, the stopper 2412 has enough area to resist the first hook part 2151, thereby lifting the first hook part 2151 and the second hook part.
  • L ⁇ 0.6mm the area of the stopper 2412 that resists the first hooking portion 2151 is small.
  • the stopper 2412 can easily contact the first hooking portion 2151. Separate, thereby disengaging the support member 24 from the end cap assembly 21 .
  • the body portion 242 is provided with a through hole 244 .
  • the projection of the stopper portion 2412 on the body portion 242 at least partially falls within the through hole 244 .
  • the stopper 2412 protrudes from the extension part 2411 along the first direction, and the through hole 244 is located on one side of the extension part 2411 along the second direction.
  • the first direction, the second direction and the thickness direction are perpendicular to each other.
  • Figure 9 is a schematic structural diagram of the support member 24 provided by some embodiments of the present application.
  • Figure 10 is an enlarged view of position E in Figure 9.
  • the projection of the stop portion 2412 on the body portion 242 at least partially falls within the through hole 244 .
  • “Along the thickness direction, the projection of the stopper 2412 on the body part 242 at least partially falls within the through hole 244” includes that the projection of the stopper 2412 on the body part 242 along the thickness direction completely falls within the through hole 244 and the stopper 2412 The projected portion of the body portion 242 along the thickness direction falls within the through hole 244 .
  • Figure 11 is a schematic structural diagram of the support member 24 provided by other embodiments of the present application.
  • Figure 12 is an enlarged view of position F in Figure 11.
  • the through hole 244 is located on one side of the extending portion 2411 in the second direction.
  • the plurality of through holes 244 may be located on one side of the extending portion 2411 in the second direction, and the plurality of through holes 244 may also be located on both sides of the extending portion 2411 in the second direction.
  • the strength of the body part 242 near the second hook part 241 is weakened, which is conducive to the deformation of the body part 242 when the first hook part 2151 and the second hook part 241 are hooked together, thereby facilitating the fastening of the body part 242.
  • the first hooking part 2151 and the second hooking part 241 are hooked together.
  • the provision of the through holes 244 can also reduce stress concentration and optimize the force received by the support member 24 .
  • the through hole 244 can also be formed simultaneously with the stopper 2412 by injection molding, and demolding is facilitated.
  • a first slope 21511 is formed on an end of the first hook portion 2151 facing the main body 221
  • a second slope 24121 is formed on an end of the stopper 2412 away from the main body 242 .
  • the projection of the first slope 21511 on the main body 221 and the projection of the second slope 24121 on the main body 221 at least partially overlap.
  • the first inclined surface 21511 is formed on one end of the first hooking part 2151 facing the main body part 221 , that is, the first inclined surface 21511 is formed on one end of the first hooking part 2151 facing the main body part 242 .
  • the first slope 21511 is located on a side of the first hook portion 2151 close to the second hook portion 241 .
  • the second slope 24121 is formed on an end of the second hook portion 241 away from the main body portion 221 , that is, the second slope 24121 is formed on an end of the first hook portion 2151 away from the main body 242 .
  • the second inclined surface 24121 is located on the side of the second hook portion 241 close to the first hook portion 2151 .
  • the inclination degrees of the first inclined surface 21511 and the second inclined surface 24121 may be the same or different.
  • the first inclined surface 21511 and the second inclined surface 24121 By providing the first inclined surface 21511 and the second inclined surface 24121, when the first hooking part 2151 and the second hooking part 241 are hooked together, the first inclined surface 21511 resists the second inclined surface 24121, and the stopper part 2412 moves along the first inclined surface 21511 and the second inclined surface 24121.
  • a slope 21511 moves relative to the first hook portion 2151. Under the resistance of the first slope 21511, the extension portion 2411 gradually deforms. Then the second slope 24121 breaks away from the first slope 21511, and the stopper 2412 moves along the distance away from the electrode.
  • the stop part 2412 resists the first hook part 2151, and the first hook part 2151 and the second hook part 241 are hooked together.
  • the first inclined surface 21511 and the second inclined surface 24121 cooperate with each other to guide the second hanging portion 241 to cooperate with the first hanging portion 2151, so that the second hanging portion It is easier for the buckle part 241 to cooperate with the first buckle part 2151.
  • the body part 242 has a first surface 2421 , and the extension part 2411 is connected to the first surface 2421 .
  • the stopper portion 2412 has a second surface 24122 for contacting the first hook portion 2151 .
  • the second surface 24122 faces the first surface 2421.
  • the distance between the second surface 24122 and the first surface 2421 is L2, which satisfies L2>1.5mm.
  • the first surface 2421 is the surface on which the extension portion 2411 is provided on the main body 242 .
  • the first surface 2421 is the surface of the main body 242 away from the main body 221 .
  • the second surface 24122 is the surface of the stopper 2412 for contacting the first hooking part 2151. At the same time, the second surface 24122 is also opposite to the first surface 2421 along the thickness direction.
  • L2 represents the distance between the first surface 2421 and the second surface 24122 along the thickness direction.
  • L2 can also be the distance between the stopper 2412 and the main body 242 .
  • the extension part 2411 By making the distance between the first surface 2421 and the second surface 24122 in the thickness direction greater than 1.5 mm, the extension part 2411 has a sufficient length to facilitate the extension part 2411 to be engaged with the first hook part 2151 and the second hook part 241 deformation occurs, thereby making it easier for the first hooking part 2151 and the second hooking part 241 to hook together. If L2 ⁇ 1.5 mm, the extension part 2411 is not easily deformed, making it difficult for the second hook part 241 to snap into the first hook part 2151 .
  • FIG. 13 is a schematic top view of the support member 24 provided in some embodiments of the present application.
  • body portion 242 has opposing first and second ends 240, 249 along the first direction. Both the first end 240 and the second end 249 are provided with second hook portions 241 .
  • the first direction is perpendicular to the thickness direction.
  • the first end 240 and the second end 249 are respectively two ends of the body part 242 in the first direction.
  • the support member 24 includes a plurality of second hooking parts 241, and the plurality of second hooking parts 241 are respectively provided at the first end 240 and the second end 249.
  • the first direction may be a left-right direction
  • the first end 240 is the end of the body part 242 located on the left side
  • the second end 249 is the end of the body part 242 located on the right side.
  • the first end 240 and the second end 249 are both provided with second hook portions 241 .
  • the first hook portions 2151 are provided on the end cover assembly 21, and the first hook portions 2151 are provided at multiple positions.
  • the two hooking parts 241 and the first hooking part 2151 cooperate with each other, which is beneficial to improving the stability of the support member 24 connected to the end cover assembly 21, thereby ensuring that the support member 24 is not easily separated from the end cover assembly 21, so that the support member 24 is not easily separated from the end cover assembly 21. It will move up and down in the housing 23, which is beneficial to maintaining the shape of the tab 222 and avoiding damage when the tab 222 is driven.
  • the first end 240 is provided with a plurality of second hooking parts 241 at intervals.
  • the second end 249 is provided with a plurality of second hooking parts 241 at intervals.
  • the distance between two adjacent second hooking parts 241 located at the first end 240 is D1
  • the distance between two adjacent second hooking parts 241 located at the second end 249 is D2, which satisfies: D1>D2.
  • the first direction, the second direction and the thickness direction are perpendicular to each other.
  • the first end 240 is provided with a plurality of second hooks 241 arranged along the second direction.
  • the end cover assembly 21 is also provided with a plurality of first hooks close to the first end 240 . 2151 , so that the plurality of second hooking parts 241 on the first end 240 can be hooked and matched with the plurality of first hooking parts 2151 on the end cover assembly 21 close to the first end 240 .
  • the second end 249 is provided with a plurality of second hooks 241 arranged along the second direction.
  • the end cover assembly 21 is also provided with a plurality of first hooks close to the second end 249 . 2151 , so that the plurality of second hooking parts 241 on the second end 249 can be hooked and matched with the plurality of first hooking parts 2151 on the end cover assembly 21 close to the second end 249 .
  • D1 represents the distance between two adjacent second hooking parts 241 among the plurality of second hooking parts 241 located at the first end 240 .
  • D2 represents the distance between two adjacent second hooking parts 241 among the plurality of second hooking parts 241 located at the second end 249 .
  • D1>D2 means that the distance between two adjacent second hooking parts 241 located at the first end 240 is greater than the distance between two adjacent second hooking parts 241 located at the second end 249.
  • D1-D2>2mm is satisfied.
  • D1-D2>2mm refers to the distance between the two adjacent second hooking parts 241 located at the first end 240 and the distance between the two adjacent second hooking parts 241 located at the second end 249 The difference in distance is greater than 2mm.
  • the lifting protection is prevented. Silly effect. If D1-D2 ⁇ 2mm, when the support member 24 is forcibly installed incorrectly, the support member 24 or the end cover assembly 21 may be deformed, resulting in successful installation even when the support member 24 is forcibly installed incorrectly.
  • the second hook portion 241 located at the first end 240 and the second hook portion 241 located at the second end 249 are arranged back to each other or facing each other.
  • Figure 14 is a cross-sectional view at position G-G in Figure 13.
  • the stop portion 2412 of the second hook portion 241 located at the first end 240 protrudes from the extension portion 2411 along the first direction toward the middle of the support member 24 .
  • the stop portion 2412 of the second hook portion 241 located at the second end 249 protrudes from the extension portion 2411 along the first direction toward the middle of the support member 24 .
  • the stop portion 2412 of the second hook portion 241 located at the first end 240 and the stop portion 2412 of the second hook portion 241 located at the second end 249 both protrude toward the middle of the support member 24 along the first direction.
  • the extension portion 2411, that is, the second hook portion 241 located at the first end 240 and the second hook portion 241 located at the second end 249 are disposed facing each other.
  • Figure 15 is a schematic structural diagram of the support member 24 provided in some embodiments of the present application.
  • Figure 16 is an enlarged view of position H in Figure 15.
  • Figure 17 is an enlarged view of position I in Figure 15.
  • Figure 18 is a schematic top view of the support member 24 provided in some embodiments of the present application.
  • Figure 19 is a cross-sectional view at the J-J position in Figure 18.
  • the stop portion 2412 of the second hook portion 241 located at the first end 240 protrudes from the extension portion 2411 in the first direction away from the middle portion of the support member 24 .
  • the stop portion 2412 of the second hook portion 241 located at the second end 249 protrudes from the extension portion 2411 in the first direction away from the middle portion of the support member 24 .
  • the stop portion 2412 of the second hook portion 241 located at the first end 240 and the stop portion 2412 of the second hook portion 241 located at the second end 249 both protrude from the middle of the support member 24 in the first direction.
  • part 2411, that is, the second hooking part 241 located at the first end 240 and the second hooking part 241 located at the second end 249 are arranged opposite to each other.
  • the support member 24 is assembled to the end cover assembly 21, then the second hook portion 241 located at the first end 240 is A hook portion 2151 and a second hook portion 241 located at the second end 249 are deformed in opposite directions, making it difficult to separate from the end cover assembly 21 after installation.
  • the support member 24 is assembled to the end cover assembly 21, then the first hook portion 241 located at the first end 240 is The hooking portion 2151 and the second hooking portion 241 located at the second end 249 are deformed in opposite directions and are not easily separated from the end cover assembly 21 after installation.
  • the support member 24 and the end cap assembly 21 are thermally fused or laser welded.
  • Figure 20 is a top view of the end cap assembly 21 and the support member 24 provided in some other embodiments of the present application.
  • Figure 21 is a cross-sectional view of the K-K position in Figure 20.
  • Figure 22 is an enlarged view of the L position in Figure 21.
  • Figure 22 shows the connection surface 2152 of the support member 24 and the end cap assembly 21 by hot melting or laser welding.
  • the connection strength between the support member 24 and the end cover assembly 21 is high, and the support member 24 and the end cover assembly 21 are not easily separated.
  • the end cap assembly 21 includes an end cap 211 and an insulating member 215 .
  • the insulating member 215 is located on a side of the end cap 211 facing the main body 221 .
  • the insulator 215 is used to insulate the isolation electrode assembly 22 and the end cap 211 .
  • the support member 24 is connected to the insulating member 215 .
  • the support member 24 By connecting the support member 24 to the insulating member 215, there is no need to change the existing manufacturing method of the end cover 211. Compared with the end cover 211, the insulating member 215 is lower in price and easier to manufacture, which is beneficial to reducing production costs. In addition, connecting the support member 24 to the insulating member 215 is less likely to cause new problems (such as sealing and insulation problems of the end cover 211) than connecting the support member 24 to the end cover 211.
  • the support member 24 is connected to the end cap 211 . Connecting the support member 24 to the end cover 211 can also fix the support member 24 so that the support member 24 can support the body portion 242 when the battery core is inverted.
  • the end cap 211 is provided with a pressure relief mechanism 212 .
  • a protruding portion 2153 protruding in a direction facing the electrode assembly 22 is formed on the insulating member 215 at a position corresponding to the pressure relief mechanism 212 , and the support member 24 is provided with a groove 246 .
  • the protrusion 2153 is at least partially received within the groove 246 .
  • the protruding portion 2153 is a protruding structure on the insulator 215 .
  • the protruding portion 2153 protrudes in a direction toward the electrode assembly 22 .
  • the position of the protruding portion 2153 corresponds to the position of the pressure relief mechanism 212 .
  • the protruding portion 2153 can be partially accommodated in the groove 246, or can be completely accommodated in the groove 246.
  • the protruding portion 2153 is accommodated in the groove 246.
  • the protruding portion 2153 cooperates with the groove 246 to limit the position of the support member 24 and prevent the support member 24 from being inserted into the shell. Move within the body 23.
  • the protruding portion 2153 abuts against the bottom surface of the groove 246 .
  • the support member 24 is restricted from moving in the direction away from the main body 221, ensuring that the support member 24 can stably support the main body 221, so that the gravity of the main body 221 is not easily transmitted.
  • the pole lug 222 it is difficult to cause the pole lug 222 to bifurcate and insert.
  • the depth of the groove 246 is H, satisfying: H>0.5 mm.
  • the groove 246 and the protruding portion 2153 have sufficient matching depth, thereby improving the limiting effect on the support member 24 so that even if it is subject to a certain degree of external impact, it will not be damaged.
  • the protrusion 2153 disengages from the groove 246.
  • the maximum gap between the groove side of the groove 246 and the outer peripheral surface of the protrusion 2153 is D3, which satisfies: 0 ⁇ D3 ⁇ 10mm.
  • the gap between the groove side of the groove 246 and the outer peripheral surface of the protrusion 2153 may vary.
  • the groove side of the groove 246 fits the outer peripheral surface of the protrusion 2153, while in other positions position, there is a large gap between the groove side surface of the groove 246 and the outer peripheral surface of the protruding portion 2153.
  • the gap existing between the groove side surface of the groove 246 and the outer peripheral surface of the protrusion 2153 may also be the same at each position.
  • the maximum gap between the groove side surface of the groove 246 and the outer peripheral surface of the protruding portion 2153 refers to the gap width at the position where the gap between the groove side surface of the groove 246 and the outer peripheral surface of the protruding portion 2153 is largest.
  • the end cap assembly 21 includes a pressure relief mechanism 212 .
  • a plurality of exhaust holes 247 are provided in the area of the support member 24 corresponding to the pressure relief mechanism 212.
  • the exhaust hole 247 is a through hole opened on the support member 24 , and the position of the exhaust hole 247 corresponds to the position of the pressure relief mechanism 212 .
  • the exhaust hole 247 can allow gas to flow from the side of the support member 24 facing the main body portion 221 to the side of the support member 24 away from the main body portion 221 .
  • the gas inside the battery cell 20 is allowed to flow to the pressure relief mechanism 212 through the exhaust holes 247, so that when the pressure inside the battery cell 20 reaches the burst pressure, it can pass through the pressure relief mechanism. 212 pressure relief.
  • the area of the plurality of exhaust holes 247 is S1
  • the area of the pressure relief mechanism 212 is S2, and S1/S2 ⁇ 0.5 is satisfied.
  • S1 is the sum of the areas of multiple exhaust holes 247.
  • S2 is the area of the pressure relief mechanism 212.
  • the gas in the battery cell 20 can smoothly flow to the pressure relief mechanism 212 through the exhaust holes 247 , so that the gas in the battery cell 20 can be easily discharged. Quickly release the pressure when it reaches the burst pressure.
  • a plurality of exhaust holes 247 are evenly distributed within the projection range of the pressure relief mechanism 212 on the support 24 .
  • the plurality of exhaust holes 247 are located in the projection of the support member 24 along the thickness direction of the pressure relief mechanism 212, and the plurality of exhaust holes 247 are evenly distributed. In other words, the plurality of exhaust holes 247 do not exceed the area on the support member 24 corresponding to the pressure relief mechanism 212, and the plurality of exhaust holes 247 are evenly distributed in this area.
  • the plurality of exhaust holes 247 are evenly distributed within the projection range of the pressure relief mechanism 212 on the support 24 along the thickness direction, which is conducive to the smooth flow of gas in the battery cell 20 to the pressure relief mechanism 212 through the exhaust holes 247 .
  • the end cap assembly 21 is provided with a first liquid injection hole 214
  • the support member 24 is provided with a second liquid injection hole 248.
  • the second liquid injection hole 248 Corresponds to the position of the first liquid injection hole 214.
  • the first liquid injection hole 214 is a through hole provided in the end cover assembly 21 for liquid injection.
  • the end cover 211 is provided with the first liquid injection hole 214 .
  • the second liquid injection hole 248 is a through hole provided in the support member 24 for liquid injection.
  • the first liquid injection hole 214 and the second liquid injection hole 248 are coaxially arranged.
  • the second liquid injection hole 248 is provided offset from the center of the support member 24 .
  • the second liquid injection hole 248 is disposed offset from the center position of the support member 24 ” means that the second liquid injection hole 248 is not located at the center position of the support member 24 .
  • the second liquid injection hole 248 By arranging the second liquid injection hole 248 away from the center of the support member 24 , when the support member 24 is installed on the end cover assembly 21 , the second liquid injection hole 248 can play a fool-proof role and reduce installation errors to a certain extent. risks of.
  • the embodiment of the present application also 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.
  • the end cap assembly 21 is disposed on a side of the battery cell 20 close to the bottom wall of the box 10 .
  • the bottom wall of the box 10 is the wall surface of the box 10 opposite to the open end of the box 10 .
  • the battery cell 20 is placed upside down in the box 10 .
  • An embodiment of the present application also provides an electrical device.
  • the electrical device includes the above-mentioned battery 100, and the battery 100 is used to provide electric energy.
  • the embodiment of the present application provides a battery cell 20.
  • the battery cell 20 includes a case 23, an electrode assembly 22, an end cap assembly 21 and a support member 24.
  • the housing 23 has an opening.
  • the electrode assembly 22 has a main body 221 and tabs 222 protruding from the main body 221 .
  • the electrode assembly 22 is accommodated in the housing 23 .
  • the end cap assembly 21 covers the opening.
  • the support member 24 is located in the housing 23 , and the tabs 222 are bent around the support member 24 .
  • the end cap assembly 21 includes an end cap 211 and an insulating member 215 .
  • the insulating member 215 is located on a side of the end cap 211 facing the electrode assembly 22 .
  • the insulating member 215 includes a first hooking part 2151, and the supporting member 24 includes a second hooking part 241.
  • the first hooking portion 2151 and the second hooking portion 241 are provided correspondingly and hooked together to restrict the support member 24 from moving in a direction close to the main body portion 221 .
  • the support member 24 abuts against the insulating member 215 in a direction away from the main body portion 221 .
  • the body portion 242 has an opposite first end 240 and a second end 249.
  • the first end 240 and the second end 249 are both provided with second hook portions 241.
  • the first end 240 is provided with a plurality of second hooking parts 241 at intervals
  • the second end 249 is provided with a plurality of second hanging parts 241 at intervals.
  • Two adjacent second hooking parts 241 are located at the first end 240 .
  • the distance between the hooking parts 241 is D1
  • the distance between two adjacent second hooking parts 241 located at the second end 249 is D2, which satisfies: D1>D2; the first direction, the second direction and the thickness direction are perpendicular to each other. .
  • the end cap 211 is provided with a pressure relief mechanism 212.
  • the insulating member 215 is formed with a protruding portion 2153 protruding in the direction facing the electrode assembly 22 at a position corresponding to the pressure relief mechanism 212.
  • the support member 24 is provided with a groove 246.
  • the protruding portion 2153 is at least partially received in the groove 246.
  • the protruding portion 2153 abuts against the bottom surface of the groove 246 .
  • the battery cell 20 is provided with a support 24, and the tabs 222 are bent around the support 24.
  • the support 24 can support the main body 221, so that the gravity of the main body 221 is not easily transferred to the poles.
  • the lug 222 will not easily cause the pole lug 222 to bifurcate and insert, thereby improving the safety of the battery cell 20 .
  • the support member 24 is connected to the insulating member 215 so that the support member 24 does not move up and down in the housing 23 and does not move the pole tabs 222 bent around the support member 24, which is beneficial to maintaining the shape of the pole tabs 222. , to prevent the pole lug 222 from being damaged when it is driven.
  • the insulating member 215 and the supporting member 24 are hooked together, making the connection simple and convenient, and the supporting member 24 can be restricted from moving in the direction close to the main body 221, that is, The pole tabs 222 bent around the support member 24 are restricted from moving in a direction closer to the main body portion 221 , thereby preventing the pole tabs 222 from being inserted into the main body portion 221 and causing a short circuit.
  • the support member 24 By making the support member 24 abut against the insulating member 215 in a direction away from the main body portion 221 , the support member 24 is restricted from moving in a direction away from the main body portion 221 , ensuring that the support member 24 can stably support the main body portion 221 so that the gravity of the main body portion 221 It is not easy to transmit to the pole lug 222, and it is not easy to cause the pole lug 222 to bifurcate and insert.
  • the first hooking parts 2151 are provided on the insulating member 215, and the second hooking parts 2151 are provided on the insulation member 215.
  • the hooking part 241 cooperates with the first hooking part 2151, which is beneficial to improving the stability of the support member 24 connected to the insulating member 215, thereby ensuring that the support member 24 is not easily separated from the insulating member 215, so that the support member 24 will not be in the shell.
  • the body 23 moves up and down, which is beneficial to maintaining the shape of the pole lug 222 and preventing the pole lug 222 from being damaged when it is driven.
  • the protruding portion 2153 By providing the protruding portion 2153 and the groove 246, the protruding portion 2153 is accommodated in the groove 246.
  • the protruding portion 2153 cooperates with the groove 246 to limit the position of the support member 24 and prevent the support member 24 from being inserted into the shell. Move within the body 23.
  • the protruding portion 2153 By making the protruding portion 2153 abut the bottom surface of the groove 246, the support member 24 is restricted from moving in the direction away from the main body 221, ensuring that the support member 24 can stably support the main body 221, so that the gravity of the main body 221 is not easily transmitted.
  • By providing the pole lug 222 it is difficult to cause the pole lug 222 to bifurcate and insert.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
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Abstract

本申请提供了一种电池单体、电池及用电设备，涉及电池领域。电池单体包括壳体、电极组件、端盖组件及支撑件。壳体具有开口。电极组件具有主体部和凸出于主体部的极耳，电极组件容纳于壳体内。端盖组件盖合于开口。支撑件位于壳体内，极耳绕着支撑件弯折。其中，支撑件连接于端盖组件，以固定支撑件。该电池单体内设置有支撑件，极耳绕着支撑件弯折，在电芯倒置的场景下，支撑件能够支撑主体部，使得主体部的重力不易传递给极耳，不易造成极耳分叉内插，提升了电池单体的安全性。另外，支撑件连接于端盖组件，使得支撑件不会在壳体内上下窜动，不会带动绕着支撑件弯折的极耳移动，有利于保持极耳的形态，避免极耳被带动时出现损坏。

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、循环寿命、放电容量、充放电倍率等性能参数，另外，还需要考虑电池的安全性。然而，在电芯倒置的场景下，电池单体安全性较差。
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在电芯倒置的场景下，电池单体安全性较差的问题。
第一方面，本申请实施例提供了一种电池单体，所述电池单体包括壳体、电极组件、端盖组件及支撑件，所述壳体具有开口；所述电极组件具有主体部和凸出于所述主体部的极耳，所述电极组件容纳于所述壳体内；所述端盖组件盖合于所述开口；所述支撑件位于所述壳体内，所述极耳绕着所述支撑件弯折；其中，所述支撑件连接于所述端盖组件，以固定所述支撑件。
在上述技术方案中，该电池单体内设置有支撑件，极耳绕着支撑件弯折，在电芯倒置的场景下，支撑件能够支撑主体部，使得主体部的重力不易传递给极耳，不易造成极耳分叉内插，提升了电池单体的安全性。另外，支撑件连接于端盖组件，使得支撑件不会在壳体内上下窜动，不会带动绕着支撑件弯折的极耳移动，有利于保持极耳的形态，避免极耳被带动时出现损坏。
作为本申请实施例的一种可选技术方案，所述支撑件可拆卸地连接于所述端盖组件。
在上述技术方案中，通过将支撑件可拆卸地连接于端盖组件，便于对电池单体进行维修，以及在电池单体报废后回收利用支撑件。
作为本申请实施例的一种可选技术方案，所述端盖组件包括第一挂扣部，所述支撑件包括第二挂扣部，所述第一挂扣部与所述第二挂扣部对应设置并挂扣配合，以限制所述支撑件向靠近所述主体部的方向移动。
在上述技术方案中，通过设置第一挂扣部和第二挂扣部，使端盖组件与支撑件挂扣配合，连接较为简单方便，且能够限制支撑件向靠近主体部的方向移动，也即限制了绕着支撑件弯折的极耳向靠近主体部的方向移动，避免了极耳向主体部内插而出现短路。
作为本申请实施例的一种可选技术方案，所述支撑件沿背离所述主体部的方向抵靠于所述端盖组件。
在上述技术方案中，通过使支撑件沿背离主体部的方向抵靠于端盖组件，限制了支撑件沿背离主体部的方向移动，保证支撑件能够稳定支撑主体部，使得主体部的重力不易传递给极耳，不易造成极耳分叉内插。
作为本申请实施例的一种可选技术方案，所述支撑件还包括本体部，所述极耳绕着所述本体部弯折；所述第二挂扣部包括延伸部和止挡部，沿所述端盖组件的厚度方向，所述延伸部从所述本体部向背离所述电极组件的方向延伸，所述止挡部连接于所述延伸部背离所述电极组件的一端，所述止挡部用于与第一挂扣部挂扣配合。
在上述技术方案中，延伸部从本体部向背离电极组件的方向延伸，并且止挡部连接于延伸部的背离电极组件的一端，延伸部能够在与第一挂扣部挂扣配合时发生形变，从而允许第一挂扣部伸入到止挡部和本体部之间，使得止挡部与第一挂扣部挂扣配合。止挡部能够与第一挂扣部抵持，以限制支撑件向靠近主体部的方向移动。
作为本申请实施例的一种可选技术方案，沿第一方向，所述止挡部凸出于所述延伸部的尺寸为L1，满足：L1＞0.6mm；所述第一方向垂直于所述厚度方向。
在上述技术方案中，通过使止挡部凸出于延伸部的尺寸超过0.6mm，使得止挡部具有足够的面积与第一挂扣部相抵持，从而提升第一挂扣部与第二挂扣部挂扣配合的稳定性。当L≤0.6mm时，止挡部与第一挂扣部相抵持的面积较小，支撑件在受到朝向主体部的外力时，止挡部容易与第一挂扣部分离，从而使支撑件脱离端盖组件。
作为本申请实施例的一种可选技术方案，所述本体部设有通孔；沿所述厚度方向，所述止挡部在所述本体部的投影至少部分落在所述通孔内；或所述止挡部沿第一方向凸出于所述延伸部，所述通孔沿第二方向位于所述延伸部的一侧，所述第一方向、所述第二方向和厚度方向两两垂直。
在上述技术方案中，通过设置通孔，减弱本体部在第二挂扣部附近的强度，有利于本体部在第一挂扣部和第二挂扣部挂扣配合时发生形变，从而便于将第一挂扣部和第二挂扣部挂扣配合。另外，通过设置通孔还能给减小应力集中，优化支撑件得到受力。当止挡部在本体部的投影至少部分落在通孔内时，还能够通过注塑成型的方式在成型止挡部的同时成型出通孔，并且便于脱模。
作为本申请实施例的一种可选技术方案，所述第一挂扣部的朝向所述主体部的一端形成有第一斜面，所述止挡部的背离所述本体部的一端形成有第二斜面，沿所述厚度方向，所述第一斜面在所述主体部的投影与所述第二斜面在所述主体部的投影至少部分重叠。
在上述技术方案中，通过设置第一斜面和第二斜面，在第一挂扣部和第二挂扣部挂扣配合时，第一斜面与第二斜面相抵持，止挡部沿着第一斜面相对于第一挂扣部移动，在第一斜面的抵持作用下，延伸部逐渐发生形 变，之后第二斜面脱离第一斜面，止挡部沿着背离电极组件的方向运动一段距离后，延伸部的形变恢复，止挡部抵持于第一挂扣部，第一挂扣部与第二挂扣部挂扣配合。通过设置第一斜面和第二斜面，第一斜面和第二斜面互相配合起到引导作用，引导第二挂扣部与第一挂扣部挂扣配合，使得第二挂扣部与第一挂扣部挂扣配合更为容易。
作为本申请实施例的一种可选技术方案，所述本体部具有第一面，所述延伸部连接于所述第一面，所述止挡部具有用于与所述第一挂扣部抵接的第二面，沿所述厚度方向，所述第二面面向所述第一面，所述第二面与所述第一面之间的距离为L2，满足，L2＞1.5mm。
在上述技术方案中，通过使第一面与第二面沿厚度方向的距离大于1.5mm，使得延伸部具有足够的长度，便于延伸部在第一挂扣部和第二挂扣部挂扣配合时发生形变，从而使第一挂扣部和第二挂扣部挂扣配合更为容易。若L2≤1.5mm，则延伸部不易发生形变，使得第二挂扣部在卡入第一挂扣部时较为困难。
作为本申请实施例的一种可选技术方案，沿第一方向，所述本体部具有相对的第一端和第二端，所述第一端与所述第二端均设有所述第二挂扣部；所述第一方向垂于所述厚度方向。
在上述技术方案中，通过在本体部的第一端和第二端上均设置第二挂扣部，与之相应地，端盖组件上对应设置有第一挂扣部，多个位置的第二挂扣部与第一挂扣部挂扣配合，有利于提升支撑件连接于端盖组件的稳定性，从而保证支撑件不易与端盖组件分离，使得支撑件不会在壳体内上下窜动，有利于保持极耳的形态，避免极耳被带动时出现损坏。
作为本申请实施例的一种可选技术方案，沿第二方向，所述第一端间隔设置有多个所述第二挂扣部，所述第二端间隔设置有多个所述第二挂扣部，位于所述第一端的相邻的两个所述第二挂扣部的距离为D1，位于所述第二端的相邻的两个所述第二挂扣部的距离为D2，满足：D1＞D2；所述第一方向、所述第二方向和所述厚度方向两两垂直。
在上述技术方案中，通过使位于第一端的相邻的两个第二挂扣部的距离大于位于第二端的相邻的两个第二挂扣部的距离，在安装支撑件时能够起到防呆作用，避免将支撑件装错。
作为本申请实施例的一种可选技术方案，满足：D1-D2＞2mm。
在上述技术方案中，通过使位于第一端的相邻的两个第二挂扣部的距离与位于第二端的相邻的两个第二挂扣部的距离的差值大于2mm，以提升防呆效果。若D1-D2≤2mm，则在强行错装支撑件时，支撑件或端盖组件可能会发生形变，导致在强行错装时也能够错装成功。
作为本申请实施例的一种可选技术方案，位于所述第一端的所述第二挂扣部与位于所述第二端的所述第二挂扣部背对设置或面向设置。
在上述技术方案中，将位于第一端的第二挂扣部和位于第二端的第二挂扣部背对设置时，将支撑件装配于端盖组件，则位于第一端的第一挂扣部和位于第二端的第二挂扣部沿着相背的方向形变，安装后不易脱离端盖组件。将位于第一端的第二挂扣部和位于第二端的第二挂扣部面向设置时，将支撑件装配于端盖组件，则位于第一端的第一挂扣部和位于第二端的第二挂扣部沿着相向的方向形变，安装后不易脱离端盖组件。
作为本申请实施例的一种可选技术方案，所述支撑件与所述端盖组件热熔或激光焊接。
在上述技术方案中，通过将支撑件与端盖组件热熔或激光焊接，使得支撑件与端盖组件的连接强度较高，支撑件与端盖组件不易分离。
作为本申请实施例的一种可选技术方案，所述端盖组件包括端盖和绝缘件，所述绝缘件位于所述端盖面向所述主体部的一侧，所述绝缘件用于绝缘隔离所述电极组件和所述端盖；所述支撑件连接于所述绝缘件。
在上述技术方案中，通过将支撑件连接于绝缘件，无需改变现有的端盖的制造方式，绝缘件相比于端盖来说，价格更低，制造更为容易，有利于降低生产成本。另外，将支撑件连接于绝缘件，相比于将支撑件连接于端盖而言，不易产生新的问题(例如端盖的密封、绝缘问题)。
作为本申请实施例的一种可选技术方案，所述端盖设置有泄压机构，所述绝缘件与所述泄压机构对应的位置形成有沿面向所述电极组件的方向凸出的凸出部，所述支撑件设有凹槽，所述凸出部至少部分容纳于所述凹槽内。
在上述技术方案中，通过设置凸出部和凹槽，使得凸出部容纳于凹槽内，凸出部与凹槽配合，能够对支撑件起到限位作用，避免支撑件在壳体内移动。
作为本申请实施例的一种可选技术方案，沿所述端盖组件的厚度方向，所述凸出部抵靠于所述凹槽的槽底面。
在上述技术方案中，通过使凸出部抵靠于凹槽的槽底面，限制了支撑件沿着背离主体部的方向移动，保证支撑件能够稳定支撑主体部，使得主体部的重力不易传递给极耳，不易造成极耳分叉内插。
作为本申请实施例的一种可选技术方案，沿所述端盖组件的厚度方向，所述凹槽的深度为H，满足：H＞0.5mm。
在上述技术方案中，通过使凹槽的深度大于0.5mm，使得凹槽与凸出部具有足够的配合深度，从而提升对支撑件的限位效果，使得即使受到一定程度的外部冲击，也不会使凸出部脱离凹槽。
作为本申请实施例的一种可选技术方案，所述凹槽的槽侧面与所述凸出部的外周面之间的最大间隙为D3，满足：0＜D3≤10mm。
在上述技术方案中，通过使凹槽的槽侧面与凸出部的外周面之间的最大间隙大于0且小于10mm，以留有装配余量，便于实现凸出部与凹槽的装配。
作为本申请实施例的一种可选技术方案，所述端盖组件包括泄压机构，沿所述端盖组件的厚度方向， 所述支撑件上与所述泄压机构相对应的区域内设有多个排气孔。
在上述技术方案中，通过在支撑件上设置多个排气孔，允许电池单体内部的气体通过排气孔流向泄压机构，以便于电池单体内的压力达到爆破压力时通过泄压机构泄压。
作为本申请实施例的一种可选技术方案，所述多个排气孔的面积为S1，所述泄压机构的面积为S2，满足S1/S2≥0.5。
在上述技术方案中，通过使多个排气孔的面积大于或等于泄压机构面积的一半，使得电池单体内的气体能够顺畅的通过排气孔流向泄压机构，以便于电池单体内的压力达到爆破压力时迅速泄压。
作为本申请实施例的一种可选技术方案，沿所述端盖组件的厚度方向，所述多个排气孔在所述泄压机构在所述支撑件上的投影范围内均匀分布。
在上述技术方案中，将多个排气孔在泄压机构沿厚度方向在支撑件上的投影范围内均匀分布，有利于电池单体内的气体顺畅的通过排气孔流向泄压机构。
作为本申请实施例的一种可选技术方案，所述端盖组件上设有第一注液孔，所述支撑件上设有第二注液孔，所述第二注液孔与所述第一注液孔位置相对应。
在上述技术方案中，通过设置第一注液孔和第二注液孔，便于注液。
作为本申请实施例的一种可选技术方案，所述第二注液孔偏离所述支撑件的中心位置设置。
在上述技术方案中，通过将第二注液孔偏离支撑件的中心位置设置，在将支撑件安装于端盖组件时，第二注液孔能够起到防呆作用，在一定程度上降低装错的风险。
第二方面，本申请实施例还提供了一种电池，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。
作为本申请实施例的一种可选技术方案，所述端盖组件设置于所述电池单体的靠近所述箱体的底壁的一侧。
在上述技术方案中，通过将端盖组件设置于电池单体的靠近箱体的底壁的一侧，即将电池单体倒置于箱体内。
第三方面，本申请实施例还提供了一种用电设备，所述用电设备包括上述的电池，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爆炸图；
图3为本申请一些实施例提供的电池单体的爆炸图；
图4为本申请一些实施例提供的电池单体的结构示意图；
图5为本申请一些实施例提供的电池单体的俯视示意图；
图6为图5中A-A位置的剖视图；
图7为图6中B位置的放大图；
图8为图6中C位置的放大图；
图9为本申请一些实施例提供的支撑件的结构示意图；
图10为图9中E位置的放大图；
图11为本申请另一些实施例提供的支撑件的结构示意图；
图12为图11中F位置的放大图；
图13为本申请一些实施例提供的支撑件的俯视示意图；
图14为图13中G-G位置的剖视图；
图15为本申请又一些实施例提供的支撑件的结构示意图；
图16为图15中H位置的放大图；
图17为图15中I位置的放大图；
图18为本申请又一些实施例提供的支撑件的俯视示意图；
图19为图18中J-J位置的剖视图；
图20为本申请另一些实施例提供的端盖组件和支撑件的俯视示意图；
图21为图20中K-K位置的剖视图；
图22为图21中L位置的放大图；
图23为图6中D位置的放大图。
图标：10-箱体；11-第一部分；12-第二部分；20-电池单体；21-端盖组件；211-端盖；212-泄压机构；213-电极端子；214-第一注液孔；215-绝缘件；2151-第一挂扣部；21511-第一斜面；2152-连接面；2153-凸出部；22-电极组件；221-主体部；222-极耳；23-壳体；24-支撑件；240-第一端；241-第二挂扣部；2411-延伸部；2412-止挡部；24121-第二斜面；24122-第二面；242-本体部；2421-第一面；243-抵持部；244-通孔；245-加强部； 246-凹槽；247-排气孔；248-第二注液孔；249-第二端；25-转接件；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。电池单体一般按封装的方式分成三种：柱形电池单体、方形电池单体和软包电池单体，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子极耳。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子极耳。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，正子极耳的数量为多个且层叠在一起，负子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。
目前，从市场形势的发展来看，电池的应用越加广泛。电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
电池技术的发展要同时考虑多方面的设计因素，例如，能量密度、循环寿命、放电容量、充放电倍率等性能参数，另外，还需要考虑电池的安全性。然而，在电芯倒置的场景下，电池单体安全性较差。
发明人进一步研究发现，电池单体包括电极组件，电极组件是电池单体中发生电化学反应的部件。电极组件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子极耳，为了保证通过大电流而不发生熔断，子极耳的数量为多个且层叠在一起形成极耳。在电芯倒置的场景下，极耳位于主体部的下方，极耳会受到主体部的重力作用。由于极耳是由多个子极耳层叠在一起形成的，因此受到重力作用时容易出现分叉，分叉的部分容易插入主体部内，与主体部内的正极片或负极片接触，从而造成短路，严重时会造成起火，甚至爆炸，导致电池单体的安全性较差。
鉴于此，本申请实施例提供一种电池单体，该电池单体内设置有支撑件，极耳绕着支撑件弯折，在电 芯倒置的场景下，支撑件能够支撑主体部，使得主体部的重力不易传递给极耳，不易造成极耳分叉内插(极耳出现分叉并插入主体部内)，提升了电池单体的安全性。另外，支撑件连接于端盖组件，使得支撑件不会在壳体内上下窜动，不会带动绕着支撑件弯折的极耳移动，有利于保持极耳的形态，避免极耳被带动时出现损坏。
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的爆炸图。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、图4、图5、图6、图7和图8，图3为本申请一些实施例提供的电池单体20的爆炸图。图4为本申请一些实施例提供的电池单体20的结构示意图。图5为本申请一些实施例提供的电池单体20的俯视示意图。图6为图5中A-A位置的剖视图。图7为图6中B位置的放大图。图8为图6中C位置的放大图。本申请实施例提供了一种电池单体20，电池单体20包括壳体23、电极组件22、端盖组件21及支撑件24。壳体23具有开口。电极组件22具有主体部221和凸出于主体部221的极耳222，电极组件22容纳于壳体23内，端盖组件21盖合于开口。支撑件24位于壳体23内，极耳222绕着支撑件24弯折。其中，支撑件24连接于端盖组件21，以固定支撑件24。
端盖组件21包括端盖211，端盖211是指盖合于壳体23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211的形状可以与壳体23的形状相适应以配合壳体23。可选地，端盖211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211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211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。可选地，端盖组件21还包括电极端子213，电极端子213设置于端盖211。电极端子213可以用于与电极组件22电连接，以用于输出或输入电池单体20的电能。可选地，端盖组件21还包括泄压机构212，泄压机构212设置于端盖211，泄压机构212用于在电池单体20的内部压力或温度达到起爆压力时打开，以泄放电池单体20的内部压力。在一些实施例中，端盖组件21还包括绝缘件215，绝缘件215设置在端盖211的内侧，绝缘件215可以用于隔离壳体23内的电连接部件与端盖211，以降低短路的风险。示例性的，绝缘件215可以是塑料、橡胶等。
壳体23是用于配合端盖211以形成电池单体20的内部环境的部件，其中，形成的内部环境可以用于容纳电极组件22、电解液以及其他部件。壳体23和端盖211可以是独立的部件，可以于壳体23上设置开口，通过在开口处使端盖211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211和壳体23一体化，具体地，端盖211和壳体23可以在其他部件入壳前先形成一个共同的接合面，当需要封装壳体23的内部时，再使端盖211盖合壳体23。壳体23可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体23的形状可以根据电极组件22的具体形状和尺寸大小来确定。壳体23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22是电池单体20中发生电化学反应的部件。壳体23内可以包含一个或更多个电极组件22。电极组件22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22的主体部221，正极片和负极片不具有活性物质的部分各自构成子极耳。为了保证通过大电流而不发生熔断，子极耳的数量为多个且层叠在一起形成极耳222。正极极耳和负极极耳可以共同位于主体部221的一端或是分别位于主体部221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，极耳222连接电极端子213以形成电流回路。极耳222凸出于主体部221，以便于与电极端子213连接，输出电池单体20的电能或向电池单体20输入电能。
支撑件24位于壳体23内，且位于主体部221的朝向端盖组件21的一侧。在电芯倒置的场景下，支撑件24能够对主体部221起到支撑作用，使得主体部221的重力不易传递给极耳222。
“极耳222绕着支撑件24弯折”是指极耳222从支撑件24的朝向主体部221的一侧开始，在支撑件24的边缘处形成折弯，并延伸至支撑件24的背离主体部221的一侧。请参照图6和图7，在一些实施例中，电池单体20包括转接件25，转接件25连接极耳222的位于支撑件24背离主体部221的一侧的部分和电极端子213，以将极耳222与电极端子213电连接。
需要说明的是，在本申请实施例中，极耳222绕着支撑件24弯折，可以是正极极耳绕着支撑件24弯折，也可以是负极极耳绕着支撑件24弯折，也可以是正极极耳和负极极耳均绕着支撑件24弯折。极耳222绕着支撑件24弯折，极耳222可以与支撑件24的端部接触，也可以不接触。
“支撑件24连接于端盖组件21，以固定支撑件24”是指支撑件24与端盖组件21连接，以使得支撑件24的活动被限制。支撑件24不能相对于端盖组件21移动或转动，也即支撑件24与端盖组件21的相对位置固定。需要说明的是，支撑件24可以与端盖组件21固定连接，例如焊接。但并不局限于支撑件24与端盖组件21固定连接，支撑件24与端盖211的连接方式只要保证在电池单体20使用时支撑件24与端盖组件21的相对位置固定即可。
该电池单体20内设置有支撑件24，极耳222绕着支撑件24弯折，在电芯倒置的场景下，支撑件24能够支撑主体部221，使得主体部221的重力不易传递给极耳222，不易造成极耳222分叉内插，提升了电池单体20的安全性。另外，支撑件24连接于端盖组件21，使得支撑件24不会在壳体23内上下窜动，不会带动绕着支撑件24弯折的极耳222移动，有利于保持极耳222的形态，避免极耳222被带动时出现损坏。
在一些实施例中，支撑件24可拆卸地连接于端盖组件21。
可拆卸连接是指支撑件24在与端盖组件21连接在一起后，正常工作时，二者的相对位置固定，不会出现分离。另外，根据需要可以通过一定的手段使支撑件24与端盖组件21分离。例如，支撑件24可以与端盖组件21螺纹连接。又如，支撑件24可以与端盖组件21卡接。
通过将支撑件24可拆卸地连接于端盖组件21，便于对电池单体20进行维修，以及在电池单体20报废后回收利用支撑件24。
请参照图6和图8，在一些实施例中，端盖组件21包括第一挂扣部2151，支撑件24包括第二挂扣部241。第一挂扣部2151与第二挂扣部241对应设置并挂扣配合，以限制支撑件24向靠近主体部221的方向移动。
第一挂扣部2151和第二挂扣部241中的至少一者形成有钩状结构，第一挂扣部2151和第二挂扣部241挂扣配合时，第一挂扣部2151和第二挂扣部241钩在一起，使得支撑件24不能向靠近主体部221的方向移动。
这里，第一挂扣部2151和第二挂扣部241对应设置是指，一个第一挂扣部2151至少对应设置有一个第二挂扣部241，第二挂扣部241的位置要与第一挂扣部2151的位置相匹配，使得安装支撑件24时，第二挂扣部241能够钩设于第一挂扣部2151。
通过设置第一挂扣部2151和第二挂扣部241，使端盖组件21与支撑件24挂扣配合，连接较为简单方便，且能够限制支撑件24向靠近主体部221的方向移动，也即限制了绕着支撑件24弯折的极耳222向靠近主体部221的方向移动，避免了极耳222向主体部221内插而出现短路。
在一些实施例中，支撑件24沿背离主体部221的方向抵靠于端盖组件21。
请参照6和图8，支撑件24上背离主体部221的一侧凸设有抵持部243，在第一挂扣部2151与第二挂扣部241挂扣配合时，抵持部243抵持于端盖组件21。抵持部243可以沿着支撑件24的边缘延伸，以形成较大的与端盖组件21抵持的抵持面积。
通过使支撑件24沿背离主体部221的方向抵靠于端盖组件21，限制了支撑件24沿背离主体部221的方向移动，保证支撑件24能够稳定支撑主体部221，使得主体部221的重力不易传递给极耳222，不易造成极耳222分叉内插。第一挂扣部2151与第二挂扣部241挂扣配合，限制了支撑件24向靠近主体部221的方向移动，支撑件24沿背离主体部221的方向抵靠于端盖组件21，又限制了支撑件24沿背离主体部221的方向移动。支撑件24既不能朝向主体部221移动，又不能背离主体部221移动，使得支撑件24不会在壳体23内上下窜动，不会带动绕着支撑件24弯折的极耳222移动，有利于保持极耳222的形态，避免极耳222被带动时出现损坏。
请参照图8，在一些实施例中，支撑件24还包括本体部242，极耳222绕着本体部242弯折。第二挂扣部241包括延伸部2411和止挡部2412。沿端盖组件21的厚度方向，延伸部2411从本体部242向背离电极组件22的方向延伸。止挡部2412连接于延伸部2411背离电极组件22的一端，止挡部2412用于与第一挂扣部2151挂扣配合。
端盖组件21的厚度方向与端盖211的厚度方向同向。请参照图8，厚度方向为图8中所示的Z方向。
本体部242是支撑件24的主要部分，本体部242用于供极耳222绕设，同时在电芯倒置的场景下能够对主体部221起到支撑作用。可选地，为了使本体部242具有较好的强度，在本体部242上设置有加强部245。 加强部245可以为凸设于本体部242的加强筋或加强肋。
延伸部2411是第二挂扣部241中连接止挡部2412和本体部242的部分。延伸部2411从本体部242向背离电极组件22的方向延伸，止挡部2412和本体部242分别位于延伸部2411的两端。止挡部2412和本体部242之间形成供第一挂扣部2151伸入的空间。在第一挂扣部2151和第二挂扣部241挂扣配合时，延伸部2411能够发生形变，以允许第一挂扣部2151伸入到上述空间内。第一挂扣部2151伸入上述空间后，延伸部2411的形变恢复，使得第一挂扣部2151和第二挂扣部241不易分离。
止挡部2412和延伸部2411形成钩状结构，在第一挂扣部2151和第二挂扣部241挂扣配合时，止挡部2412能够抵持于第一挂扣部2151，使得支撑件24不能向靠近主体部221的方向移动。
延伸部2411从本体部242向背离电极组件22的方向延伸，并且止挡部2412连接于延伸部2411的背离电极组件22的一端，延伸部2411能够在与第一挂扣部2151挂扣配合时发生形变，从而允许第一挂扣部2151伸入到止挡部2412和本体部242之间，使得止挡部2412与第一挂扣部2151挂扣配合。止挡部2412能够与第一挂扣部2151抵持，以限制支撑件24向靠近主体部221的方向移动。
请参照图8，在一些实施例中，沿第一方向，止挡部2412凸出于延伸部2411的尺寸为L1，满足：L1＞0.6mm。第一方向垂直于厚度方向。
第一方向是止挡部2412凸出于延伸部2411的方向，同时第一方向也是垂直于厚度方向的方向。请参照图8，第一方向可以是图8中所示的X方向。
L1表示止挡部2412沿第一方向凸出于延伸部2411的尺寸，也即沿第一方向，止挡部2412背离延伸部2411的表面与止挡部2412的朝向延伸部2411的表面之间的距离。沿第一方向，止挡部2412凸出于延伸部2411的尺寸的取值可以为：L1＝0.7mm、0.8mm、0.9mm、1mm、1.2mm、1.5mm等。
通过使止挡部2412凸出于延伸部2411的尺寸超过0.6mm，使得止挡部2412具有足够的面积与第一挂扣部2151相抵持，从而提升第一挂扣部2151与第二挂扣部241挂扣配合的稳定性。当L≤0.6mm时，止挡部2412与第一挂扣部2151相抵持的面积较小，支撑件24在受到朝向主体部221的外力时，止挡部2412容易与第一挂扣部2151分离，从而使支撑件24脱离端盖组件21。
在一些实施例中，本体部242设有通孔244。沿厚度方向，止挡部2412在本体部242的投影至少部分落在通孔244内。或止挡部2412沿第一方向凸出于延伸部2411，通孔244沿第二方向位于延伸部2411的一侧。第一方向、第二方向和厚度方向两两垂直。
请参照图9和图10，图9为本申请一些实施例提供的支撑件24的结构示意图。图10为图9中E位置的放大图。在一些实施例中，沿厚度方向，止挡部2412在本体部242的投影至少部分落在通孔244内。“沿厚度方向，止挡部2412在本体部242的投影至少部分落在通孔244内”包括止挡部2412沿厚度方向在本体部242的投影完全落在通孔244内和止挡部2412沿厚度方向在本体部242的投影部分落在通孔244内。
请参照图11和图12，图11为本申请另一些实施例提供的支撑件24的结构示意图。图12为图11中F位置的放大图。在另一些实施例中，通孔244位于延伸部2411在第二方向的一侧。通孔244可以是一个也可以是多个。多个通孔244可以位于延伸部2411在第二方向的一侧，多个通孔244也可以位于延伸部2411在第二方向的两侧。
通过设置通孔244，减弱本体部242在第二挂扣部241附近的强度，有利于本体部242在第一挂扣部2151和第二挂扣部241挂扣配合时发生形变，从而便于将第一挂扣部2151和第二挂扣部241挂扣配合。另外，通过设置通孔244还能给减小应力集中，优化支撑件24得到受力。当止挡部2412在本体部242的投影至少部分落在通孔244内时，还能够通过注塑成型的方式在成型止挡部2412的同时成型出通孔244，并且便于脱模。
请再次参照图8，在一些实施例中，第一挂扣部2151的朝向主体部221的一端形成有第一斜面21511，止挡部2412的背离本体部242的一端形成有第二斜面24121。沿厚度方向，第一斜面21511在主体部221的投影与第二斜面24121在主体部221的投影至少部分重叠。
第一斜面21511形成于第一挂扣部2151的朝向主体部221的一端，也即第一斜面21511形成于第一挂扣部2151的朝向本体部242的一端。沿着第一方向，第一斜面21511位于第一挂扣部2151的靠近第二挂扣部241的一侧。
第二斜面24121形成于第二挂扣部241的背离主体部221的一端，也即第二斜面24121形成于第一挂扣部2151的背离本体部242的一端。沿着第一方向，第二斜面24121位于第二挂扣部241的靠近第一挂扣部2151的一侧。
需要说明的是，第一斜面21511和第二斜面24121的倾斜程度可以相同，也可以不同。
通过设置第一斜面21511和第二斜面24121，在第一挂扣部2151和第二挂扣部241挂扣配合时，第一斜面21511与第二斜面24121相抵持，止挡部2412沿着第一斜面21511相对于第一挂扣部2151移动，在第一斜面21511的抵持作用下，延伸部2411逐渐发生形变，之后第二斜面24121脱离第一斜面21511，止挡部2412沿着背离电极组件22的方向运动一段距离后，延伸部2411的形变恢复，止挡部2412抵持于第一挂扣部2151，第一挂扣部2151与第二挂扣部241挂扣配合。通过设置第一斜面21511和第二斜面24121，第一斜面21511和第二斜面24121互相配合起到引导作用，引导第二挂扣部241与第一挂扣部2151挂扣配合，使得第二挂扣部241与第一挂扣部2151挂扣配合更为容易。
请参照图8，在一些实施例中，本体部242具有第一面2421，延伸部2411连接于第一面2421。止挡部2412具有用于与第一挂扣部2151抵接的第二面24122。沿厚度方向，第二面24122面向第一面2421。第二面 24122与第一面2421之间的距离为L2，满足，L2＞1.5mm。
第一面2421是本体部242上设置延伸部2411的表面。当本体部242为板状结构时，第一面2421为本体部242的背离主体部221的表面。
第二面24122是止挡部2412上用于与第一挂扣部2151抵接的表面，同时，第二面24122沿着厚度方向还与第一面2421相对。
L2表示第一面2421沿厚度方向和第二面24122的距离，当本体部242为板状结构时，L2也可以为止挡部2412与本体部242的间距。沿厚度方向，第一面2421和第二面24122之间的距离可以为：L2＝1.6mm、1.7mm、1.8mm、1.9mm、2mm等。
通过使第一面2421与第二面24122沿厚度方向的距离大于1.5mm，使得延伸部2411具有足够的长度，便于延伸部2411在第一挂扣部2151和第二挂扣部241挂扣配合时发生形变，从而使第一挂扣部2151和第二挂扣部241挂扣配合更为容易。若L2≤1.5mm，则延伸部2411不易发生形变，使得第二挂扣部241在卡入第一挂扣部2151时较为困难。
请参照图13，图13为本申请一些实施例提供的支撑件24的俯视示意图。在一些实施例中，沿第一方向，本体部242具有相对的第一端240和第二端249。第一端240与第二端249均设有第二挂扣部241。第一方向垂于厚度方向。
第一端240和第二端249分别是本体部242在第一方向的两个端部。支撑件24包括多个第二挂扣部241，多个第二挂扣部241分别设置于第一端240和第二端249。结合到图13中，第一方向可以是左右方向，第一端240为本体部242中位于左侧的一端，第二端249为本体部242中位于右侧的一端。第一端240和第二端249上都设置有第二挂扣部241。
通过在本体部242的第一端240和第二端249上均设置第二挂扣部241，与之相应地，端盖组件21上对应设置有第一挂扣部2151，多个位置的第二挂扣部241与第一挂扣部2151挂扣配合，有利于提升支撑件24连接于端盖组件21的稳定性，从而保证支撑件24不易与端盖组件21分离，使得支撑件24不会在壳体23内上下窜动，有利于保持极耳222的形态，避免极耳222被带动时出现损坏。
请参照图13，在一些实施例中，沿第二方向，第一端240间隔设置有多个第二挂扣部241。第二端249间隔设置有多个第二挂扣部241。位于第一端240的相邻的两个第二挂扣部241的距离为D1，位于第二端249的相邻的两个第二挂扣部241的距离为D2，满足：D1＞D2。第一方向、第二方向和厚度方向两两垂直。
第一端240上设置有沿着第二方向排布的多个第二挂扣部241，与之相应地，端盖组件21上靠近第一端240的位置也设置有多个第一挂扣部2151，使得第一端240上的多个第二挂扣部241能够与端盖组件21上的靠近第一端240位置的多个第一挂扣部2151挂扣配合。
第二端249上设置有沿着第二方向排布的多个第二挂扣部241，与之相应地，端盖组件21上靠近第二端249的位置也设置有多个第一挂扣部2151，使得第二端249上的多个第二挂扣部241能够与端盖组件21上的靠近第二端249位置的多个第一挂扣部2151挂扣配合。
D1表示位于第一端240的多个第二挂扣部241中，相邻的两个第二挂扣部241之间的距离。D2表示位于第二端249的多个第二挂扣部241中，相邻的两个第二挂扣部241之间的距离。D1＞D2表示：位于第一端240的相邻的两个第二挂扣部241之间的距离大于位于第二端249相邻的两个第二挂扣部241之间的距离。
通过使位于第一端240的相邻的两个第二挂扣部241的距离大于位于第二端249的相邻的两个第二挂扣部241的距离，在安装支撑件24时能够起到防呆作用，避免将支撑件24装错。
在一些实施例中，满足：D1-D2＞2mm。
“D1-D2＞2mm”是指位于第一端240的相邻的两个第二挂扣部241之间的距离与位于第二端249相邻的两个第二挂扣部241之间的距离的差值大于2mm。位于第一端240的相邻的两个第二挂扣部241之间的距离与位于第二端249相邻的两个第二挂扣部241之间的距离的差值可以为：D1-D2＝2.1mm、2.4mm、2.8mm、3mm等。
通过使位于第一端240的相邻的两个第二挂扣部241的距离与位于第二端249的相邻的两个第二挂扣部241的距离的差值大于2mm，以提升防呆效果。若D1-D2≤2mm，则在强行错装支撑件24时，支撑件24或端盖组件21可能会发生形变，导致在强行错装时也能够错装成功。
在一些实施例中，位于第一端240的第二挂扣部241与位于第二端249的第二挂扣部241背对设置或面向设置。
请参照图13和图14，图14为图13中G-G位置的剖视图。在一些实施例中，位于第一端240的第二挂扣部241的止挡部2412沿第一方向朝着支撑件24的中部凸出于延伸部2411。位于第二端249的第二挂扣部241的止挡部2412沿第一方向朝着支撑件24的中部凸出于延伸部2411。位于第一端240的第二挂扣部241的止挡部2412和位于第二端249的第二挂扣部241的止挡部2412均沿第一方向朝着支撑件24的中部凸出于延伸部2411，也即位于第一端240的第二挂扣部241与位于第二端249的第二挂扣部241面向设置。
请参照图15、图16、图17、图18和图19，图15为本申请又一些实施例提供的支撑件24的结构示意图。图16为图15中H位置的放大图。图17为图15中I位置的放大图。图18为本申请又一些实施例提供的支撑件24的俯视示意图。图19为图18中J-J位置的剖视图。在又一些实施例中，位于第一端240的第二挂扣部241的止挡部2412沿第一方向背离支撑件24的中部凸出于延伸部2411。位于第二端249的第二挂扣部241的止挡部2412沿第一方向背离支撑件24的中部凸出于延伸部2411。位于第一端240的第二挂扣部241的止挡部2412和位于第二端249的第二挂扣部241的止挡部2412均沿第一方向背离支撑件24的中部凸出于延伸部2411，也即位于第 一端240的第二挂扣部241与位于第二端249的第二挂扣部241背对设置。
将位于第一端240的第二挂扣部241和位于第二端249的第二挂扣部241背对设置时，将支撑件24装配于端盖组件21，则位于第一端240的第一挂扣部2151和位于第二端249的第二挂扣部241沿着相背的方向形变，安装后不易脱离端盖组件21。将位于第一端240的第二挂扣部241和位于第二端249的第二挂扣部241面向设置时，将支撑件24装配于端盖组件21，则位于第一端240的第一挂扣部2151和位于第二端249的第二挂扣部241沿着相向的方向形变，安装后不易脱离端盖组件21。
在另一些实施例中，支撑件24与端盖组件21热熔或激光焊接。
请参照图20、图21和图22，图20为本申请另一些实施例提供的端盖组件21和支撑件24的俯视示意图。图21为图20中K-K位置的剖视图。图22为图21中L位置的放大图。图22中示出了支撑件24与端盖组件21热熔或激光焊接的连接面2152。
通过将支撑件24与端盖组件21热熔或激光焊接，使得支撑件24与端盖组件21的连接强度较高，支撑件24与端盖组件21不易分离。
在一些实施例中，端盖组件21包括端盖211和绝缘件215，绝缘件215位于端盖211面向主体部221的一侧。绝缘件215用于绝缘隔离电极组件22和端盖211。支撑件24连接于绝缘件215。
通过将支撑件24连接于绝缘件215，无需改变现有的端盖211的制造方式，绝缘件215相比于端盖211来说，价格更低，制造更为容易，有利于降低生产成本。另外，将支撑件24连接于绝缘件215，相比于将支撑件24连接于端盖211而言，不易产生新的问题(例如端盖211的密封、绝缘问题)。
在另一些实施例中，支撑件24连接于端盖211。将支撑件24连接于端盖211，同样能够固定支撑件24，使得在电芯倒置的场景下，支撑件24能够支撑本体部242。
请参照图23，图23为图6中D位置的放大图。在一些实施例中，端盖211设置有泄压机构212。绝缘件215与泄压机构212对应的位置形成有沿面向电极组件22的方向凸出的凸出部2153，支撑件24设有凹槽246。凸出部2153至少部分容纳于凹槽246内。
凸出部2153是绝缘件215上的凸出结构，凸出部2153沿着朝向电极组件22的方向凸出，凸出部2153的位置与泄压机构212的位置相对应。凸出部2153可以部分容纳于凹槽246，也可以完全容纳于凹槽246内。
通过设置凸出部2153和凹槽246，使得凸出部2153容纳于凹槽246内，凸出部2153与凹槽246配合，能够对支撑件24起到限位作用，避免支撑件24在壳体23内移动。
请参照图23，在一些实施例中，沿端盖组件21的厚度方向，凸出部2153抵靠于凹槽246的槽底面。
“沿端盖组件21的厚度方向，凸出部2153抵靠于凹槽246的槽底面”也可以理解为凸出部2153的背离端盖211的端面与凹槽246的槽底面相抵靠。
通过使凸出部2153抵靠于凹槽246的槽底面，限制了支撑件24沿着背离主体部221的方向移动，保证支撑件24能够稳定支撑主体部221，使得主体部221的重力不易传递给极耳222，不易造成极耳222分叉内插。
在一些实施例中，沿端盖组件21的厚度方向，凹槽246的深度为H，满足：H＞0.5mm。
H表示凹槽246的深度，凹槽246的深度的取值可以为：H＝0.6mm、0.7mm、0.8mm、0.9mm、1mm等。
通过使凹槽246的深度大于0.5mm，使得凹槽246与凸出部2153具有足够的配合深度，从而提升对支撑件24的限位效果，使得即使受到一定程度的外部冲击，也不会使凸出部2153脱离凹槽246。
在一些实施例中，凹槽246的槽侧面与凸出部2153的外周面之间的最大间隙为D3，满足：0＜D3≤10mm。
凹槽246的槽侧面与凸出部2153的外周面之间的间隙可能是变化的，例如，在一些位置，凹槽246的槽侧面与凸出部2153的外周面贴合，而在另一些位置，凹槽246的槽侧面与凸出部2153的外周面之间存在较大的间隙。当然，凹槽246的槽侧面与凸出部2153的外周面之间存在的间隙也可能在每个位置均相同。凹槽246的槽侧面与凸出部2153的外周面之间的最大间隙是指在凹槽246的槽侧面与凸出部2153的外周面间隙最大的位置的间隙宽度。凹槽246的槽侧面与凸出部2153的外周面之间的最大间隙的取值可以为：D3＝1mm、2mm、3mm、4mm、5mm、6mm、7mm、8mm、9mm、10mm等。
通过使凹槽246的槽侧面与凸出部2153的外周面之间的最大间隙大于0且小于10mm，以留有装配余量，便于实现凸出部2153与凹槽246的装配。
请参照图9、图11和图23，在一些实施例中，端盖组件21包括泄压机构212。沿端盖组件21的厚度方向，支撑件24上与泄压机构212相对应的区域内设有多个排气孔247。
排气孔247是开设于支撑件24上的通孔，排气孔247的位置与泄压机构212的位置相对应。排气孔247能够允许气体从支撑件24的朝向主体部221的一侧流向支撑件24的背离主体部221的一侧。
通过在支撑件24上设置多个排气孔247，允许电池单体20内部的气体通过排气孔247流向泄压机构212，以便于电池单体20内的压力达到爆破压力时通过泄压机构212泄压。
在一些实施例中，多个排气孔247的面积为S1，泄压机构212的面积为S2，满足S1/S2≥0.5。
S1是多个排气孔247面积之和。S2则是泄压机构212的面积。多个排气孔247的面积与泄压机构212的面积的比值可以为：S1/S2＝0.5、0.6、0.7、0.8等。
通过使多个排气孔247的面积大于或等于泄压机构212面积的一半，使得电池单体20内的气体能够顺畅的通过排气孔247流向泄压机构212，以便于电池单体20内的压力达到爆破压力时迅速泄压。
请参照图9、图11和图23，在一些实施例中，沿端盖组件21的厚度方向，多个排气孔247在泄压机构212在支撑件24上的投影范围内均匀分布。
多个排气孔247位于泄压机构212沿厚度方向在支撑件24的投影内，并且多个排气孔247是均匀分布的。换句话说，多个排气孔247不超出于支撑件24上与泄压机构212对应的区域，并且多个排气孔247在这一区域内均匀分布的。
将多个排气孔247在泄压机构212沿厚度方向在支撑件24上的投影范围内均匀分布，有利于电池单体20内的气体顺畅的通过排气孔247流向泄压机构212。
请参照图9、图11和图23，在一些实施例中，端盖组件21上设有第一注液孔214，支撑件24上设有第二注液孔248，第二注液孔248与第一注液孔214位置相对应。
第一注液孔214是设置于端盖组件21的用于注液的通孔，例如，端盖211设置有第一注液孔214。第二注液孔248是设置于支撑件24的用于注液的通孔。可选地，第一注液孔214与第二注液孔248同轴设置。
通过设置第一注液孔214和第二注液孔248，便于注液。
请参照图9、图11和图23，在一些实施例中，第二注液孔248偏离支撑件24的中心位置设置。
“第二注液孔248偏离支撑件24的中心位置设置”是指第二注液孔248不在支撑件24的中心位置。
通过将第二注液孔248偏离支撑件24的中心位置设置，在将支撑件24安装于端盖组件21时，第二注液孔248能够起到防呆作用，在一定程度上降低装错的风险。
本申请实施例还提供了一种电池100，电池100包括箱体10及上述的电池单体20，电池单体20容纳于箱体10内。
在一些实施例中，端盖组件21设置于电池单体20的靠近箱体10的底壁的一侧。
箱体10的底壁即箱体10上与箱体10的开口端相对的壁面。
通过将端盖组件21设置于电池单体20的靠近箱体10的底壁的一侧，即将电池单体20倒置于箱体10内。
本申请实施例还提供了一种用电设备，用电设备包括上述的电池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8。
本申请实施例提供了一种电池单体20，电池单体20包括壳体23、电极组件22、端盖组件21及支撑件24。壳体23具有开口。电极组件22具有主体部221和凸出于主体部221的极耳222，电极组件22容纳于壳体23内。端盖组件21盖合于开口。支撑件24位于壳体23内，极耳222绕着支撑件24弯折。端盖组件21包括端盖211和绝缘件215，绝缘件215位于端盖211的朝向电极组件22的一侧。其中，绝缘件215包括第一挂扣部2151，支撑件24包括第二挂扣部241。第一挂扣部2151与第二挂扣部241对应设置并挂扣配合，以限制支撑件24向靠近主体部221的方向移动。支撑件24沿背离主体部221的方向抵靠于绝缘件215。
沿第一方向，本体部242具有相对的第一端240和第二端249，第一端240与第二端249均设有第二挂扣部241。沿第二方向，第一端240间隔设置有多个第二挂扣部241，第二端249间隔设置有多个第二挂扣部241，位于第一端240的相邻的两个第二挂扣部241的距离为D1，位于第二端249的相邻的两个第二挂扣部241的距离为D2，满足：D1＞D2；第一方向、第二方向和厚度方向两两垂直。
端盖211设置有泄压机构212，绝缘件215与泄压机构212对应的位置形成有沿面向电极组件22的方向凸出的凸出部2153，支撑件24设有凹槽246，凸出部2153至少部分容纳于凹槽246内。沿端盖组件21的厚度方向，凸出部2153抵靠于凹槽246的槽底面。
该电池单体20内设置有支撑件24，极耳222绕着支撑件24弯折，在电芯倒置的场景下，支撑件24能够支撑主体部221，使得主体部221的重力不易传递给极耳222，不易造成极耳222分叉内插，提升了电池单体20的安全性。另外，支撑件24连接于绝缘件215，使得支撑件24不会在壳体23内上下窜动，不会带动绕着支撑件24弯折的极耳222移动，有利于保持极耳222的形态，避免极耳222被带动时出现损坏。通过设置第一挂扣部2151和第二挂扣部241，使绝缘件215与支撑件24挂扣配合，连接较为简单方便，且能够限制支撑件24向靠近主体部221的方向移动，也即限制了绕着支撑件24弯折的极耳222向靠近主体部221的方向移动，避免了极耳222向主体部221内插而出现短路。通过使支撑件24沿背离主体部221的方向抵靠于绝缘件215，限制了支撑件24沿背离主体部221的方向移动，保证支撑件24能够稳定支撑主体部221，使得主体部221的重力不易传递给极耳222，不易造成极耳222分叉内插。
通过在本体部242的第一端240和第二端249上均设置第二挂扣部241，与之相应地，绝缘件215上对应设置有第一挂扣部2151，多个位置的第二挂扣部241与第一挂扣部2151挂扣配合，有利于提升支撑件24连接于绝缘件215的稳定性，从而保证支撑件24不易与绝缘件215分离，使得支撑件24不会在壳体23内上下窜动，有利于保持极耳222的形态，避免极耳222被带动时出现损坏。通过使位于第一端240的相邻的两个第二挂扣部241的距离大于位于第二端249的相邻的两个第二挂扣部241的距离，在安装支撑件24时能够起到防呆作用，避免将支撑件24装错。
通过设置凸出部2153和凹槽246，使得凸出部2153容纳于凹槽246内，凸出部2153与凹槽246配合，能够对支撑件24起到限位作用，避免支撑件24在壳体23内移动。通过使凸出部2153抵靠于凹槽246的槽底面，限制了支撑件24沿着背离主体部221的方向移动，保证支撑件24能够稳定支撑主体部221，使得主体部221的重力不易传递给极耳222，不易造成极耳222分叉内插。
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 (27)

  1. 一种电池单体，其中，包括：
    壳体，具有开口；
    电极组件，具有主体部和凸出于所述主体部的极耳，所述电极组件容纳于所述壳体内；
    端盖组件，盖合于所述开口；
    支撑件，位于所述壳体内，所述极耳绕着所述支撑件弯折；
    所述支撑件连接于所述端盖组件，以固定所述支撑件。
  2. 根据权利要求1所述电池单体，其中，所述支撑件可拆卸地连接于所述端盖组件。
  3. 根据权利要求2所述电池单体，其中，所述端盖组件包括第一挂扣部，所述支撑件包括第二挂扣部，所述第一挂扣部与所述第二挂扣部对应设置并挂扣配合，以限制所述支撑件向靠近所述主体部的方向移动。
  4. 根据权利要求3所述电池单体，其中，所述支撑件沿背离所述主体部的方向抵靠于所述端盖组件。
  5. 根据权利要求3或4所述电池单体，其中，所述支撑件还包括本体部，所述极耳绕着所述本体部弯折；
    所述第二挂扣部包括延伸部和止挡部，沿所述端盖组件的厚度方向，所述延伸部从所述本体部向背离所述电极组件的方向延伸，所述止挡部连接于所述延伸部背离所述电极组件的一端，所述止挡部用于与第一挂扣部挂扣配合。
  6. 根据权利要求5所述电池单体，其中，沿第一方向，所述止挡部凸出于所述延伸部的尺寸为L1，满足：L1＞0.6mm；
    所述第一方向垂直于所述厚度方向。
  7. 根据权利要求5所述电池单体，其中，所述本体部设有通孔；
    沿所述厚度方向，所述止挡部在所述本体部的投影至少部分落在所述通孔内；或
    所述止挡部沿第一方向凸出于所述延伸部，所述通孔沿第二方向位于所述延伸部的一侧，所述第一方向、所述第二方向和厚度方向两两垂直。
  8. 根据权利要求5所述电池单体，其中，所述第一挂扣部的朝向所述主体部的一端形成有第一斜面，所述止挡部的背离所述本体部的一端形成有第二斜面，沿所述厚度方向，所述第一斜面在所述主体部的投影与所述第二斜面在所述主体部的投影至少部分重叠。
  9. 根据权利要求5-8任一项所述电池单体，其中，所述本体部具有第一面，所述延伸部连接于所述第一面，所述止挡部具有用于与所述第一挂扣部抵接的第二面，沿所述厚度方向，所述第二面面向所述第一面，所述第二面与所述第一面之间的距离为L2，满足，L2＞1.5mm。
  10. 根据权利要求5-9任一项所述电池单体，其中，沿第一方向，所述本体部具有相对的第一端和第二端，所述第一端与所述第二端均设有所述第二挂扣部；
    所述第一方向垂于所述厚度方向。
  11. 根据权利要求10所述电池单体，其中，沿第二方向，所述第一端间隔设置有多个所述第二挂扣部，所述第二端间隔设置有多个所述第二挂扣部，位于所述第一端的相邻的两个所述第二挂扣部的距离为D1，位于所述第二端的相邻的两个所述第二挂扣部的距离为D2，满足：D1＞D2；
    所述第一方向、所述第二方向和所述厚度方向两两垂直。
  12. 根据权利要求11所述电池单体，其中，满足：D1-D2＞2mm。
  13. 根据权利要求10-12任一项所述电池单体，其中，位于所述第一端的所述第二挂扣部与位于所述第二端的所述第二挂扣部背对设置或面向设置。
  14. 根据权利要求1所述电池单体，其中，所述支撑件与所述端盖组件热熔或激光焊接。
  15. 根据权利要求1-14任一项所述电池单体，其中，所述端盖组件包括端盖和绝缘件，所述绝缘件位于所述端盖面向所述主体部的一侧，所述绝缘件用于绝缘隔离所述电极组件和所述端盖；
    所述支撑件连接于所述绝缘件。
  16. 根据权利要求15所述电池单体，其中，所述端盖设置有泄压机构，所述绝缘件与所述泄压机构对应的位置形成有沿面向所述电极组件的方向凸出的凸出部，所述支撑件设有凹槽，所述凸出部至少部分容纳于所述凹槽内。
  17. 根据权利要求16所述电池单体，其中，沿所述端盖组件的厚度方向，所述凸出部抵靠于所述凹槽的槽底面。
  18. 根据权利要求16或17所述电池单体，其中，沿所述端盖组件的厚度方向，所述凹槽的深度为H，满足：H＞0.5mm。
  19. 根据权利要求16-18任一项所述电池单体，其中，所述凹槽的槽侧面与所述凸出部的外周面之间的最大间隙为D3，满足：0＜D3≤10mm。
  20. 根据权利要求1-19任一项所述电池单体，其中，所述端盖组件包括泄压机构，沿所述端盖组件的厚度方向，所述支撑件上与所述泄压机构相对应的区域内设有多个排气孔。
  21. 根据权利要求20所述电池单体，其中，所述多个排气孔的面积为S1，所述泄压机构的面积为S2，满足S1/S2≥0.5。
  22. 根据权利要求20或21所述电池单体，其中，沿所述端盖组件的厚度方向，所述多个排气孔在所述泄 压机构在所述支撑件上的投影范围内均匀分布。
  23. 根据权利要求1-22任一项所述电池单体，其中，所述端盖组件上设有第一注液孔，所述支撑件上设有第二注液孔，所述第二注液孔与所述第一注液孔位置相对应。
  24. 根据权利要求23所述电池单体，其中，所述第二注液孔偏离所述支撑件的中心位置设置。
  25. 一种电池，其中，包括：
    箱体；
    根据权利要求1-24任一项所述的电池单体，所述电池单体容纳于所述箱体内。
  26. 根据权利要求25所述电池，其中，所述端盖组件设置于所述电池单体的靠近所述箱体的底壁的一侧。
  27. 一种用电设备，其中，包括根据权利要求25-26任一项所述的电池，所述电池用于提供电能。
PCT/CN2022/119423 2022-09-16 2022-09-16 电池单体、电池及用电设备 WO2024055312A1 (zh)

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