WO2023240487A1 - 端盖组件、电池单体、电池以及用电装置 - Google Patents

端盖组件、电池单体、电池以及用电装置 Download PDF

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Publication number
WO2023240487A1
WO2023240487A1 PCT/CN2022/098920 CN2022098920W WO2023240487A1 WO 2023240487 A1 WO2023240487 A1 WO 2023240487A1 CN 2022098920 W CN2022098920 W CN 2022098920W WO 2023240487 A1 WO2023240487 A1 WO 2023240487A1
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WO
WIPO (PCT)
Prior art keywords
adapter
end cap
limiting
cap assembly
battery
Prior art date
Application number
PCT/CN2022/098920
Other languages
English (en)
French (fr)
Inventor
苏华圣
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to PCT/CN2022/098920 priority Critical patent/WO2023240487A1/zh
Publication of WO2023240487A1 publication Critical patent/WO2023240487A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of batteries, and in particular to an end cover assembly, a battery cell, a battery and an electrical device.
  • Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection.
  • battery technology is an important factor related to their development.
  • Batteries include battery cells. There is a risk of breakage of the adapter used to connect the end cover assembly to the tabs of existing battery cells, which affects the safety of the battery cells.
  • this application provides an end cover assembly, a battery cell, a battery and an electrical device.
  • the adapter of the end cover assembly is not easy to break and has high safety performance.
  • the end cap assembly includes an end cap, an electrode terminal, an adapter, and an insulator.
  • the electrode terminal is arranged on the end cover, the first adapter portion of the adapter is used to connect to the electrode terminal, and the second adapter portion is used to connect to the tab, thereby electrically connecting the tab to the electrode terminal.
  • the arrangement of the insulating member can insulate the end cover and the adapter from each other through its insulating body, and limit the movement of the second adapter part relative to the insulator through its limiting part to avoid the action of external forces on the second adapter part. The lower movement will be bent, pulled, etc., thereby preventing the adapter from breaking due to fatigue, and improving the safety performance of the end cover assembly and the battery cells it is used in.
  • the snap-in protrusion can be used to provide a limit in the thickness direction to the second adapter part, thereby avoiding external force on the second adapter part. It moves in the direction away from the electrode terminal along the thickness direction. It can effectively resist the tensile force of external components such as pole tabs and avoid the fatigue effect of the adapter being pulled and causing fracture.
  • the surface of the latch protrusion in contact with the second adapter part is a flat surface.
  • the end cover assembly provided by the embodiment of the present application can increase the contact area between the snapping protrusion and the second adapter portion by making the contact surface between the snapping protrusion and the second adapter portion be flat, thereby strengthening the snapping protrusion. It has a limiting effect on the second adapter part and prevents the second adapter part from moving relative to the insulating member under the action of external force.
  • the adapter in the end cap assembly provided by the embodiment of the present application, by making the surface of the clamping protrusion away from the insulating body an inclined surface, the adapter can provide guidance to the adapter when it is pressed between the clamping protrusion and the electrode terminal. , which facilitates the assembly of adapters.
  • the limiting part further includes a connecting body, which is used to connect the clamping protrusion and the insulating body and limit the movement of the second adapter part along the first direction, and the first direction intersects the thickness direction.
  • the limiting part also includes a connector, so that the clamping protrusion can be connected to the insulating body through the connector, ensuring the relative position between the clamping protrusion and the second adapter part.
  • the connecting body can also restrict the movement of the second adapter part in the first direction, so that the relative position of the second adapter part and the insulating member is fixed, which can further improve the position limitation of the second adapter part and reduce the risk of the adapter part. Probability of fatigue damage.
  • the insulating member further includes a support portion that protrudes from a surface of the insulating body facing the second adapter portion and is used to restrict the movement of the second adapter portion toward the side where the electrode terminal is located.
  • the limiting portion is provided on the supporting portion, and the limiting portion is protruding from the supporting portion on a side of the supporting portion away from the electrode terminal.
  • the number of limiting parts is more than two, and the two or more limiting parts are spaced apart around the second adapter part.
  • the end cap assembly provided by the embodiment of the present application has the number of limiting parts being more than two, and the two or more limiting parts are spaced around the second transfer part, so that the second rotating part can be protected by the two or more limiting parts.
  • the connecting portion is limited, effectively reducing the movement of the second adapter portion toward the electrode terminal side under external forces such as the internal pressure of the battery cell.
  • the insulating member further includes a separation ring, the separation ring is disposed on the periphery of the limiting portion, and an avoidance gap is formed between the separation ring and the limiting portion.
  • the end cap assembly provided by the embodiment of the present application can limit the lateral displacement of structures such as the adapter through the separation ring.
  • the existence of the avoidance gap facilitates the deformation of the limiting portion of the adapter during installation. Ensure the installation requirements of the adapter.
  • the limiting part includes one of the plug-in part and the slot
  • the second adapter part includes the other of the plug-in part and the slot
  • the plug-in part can extend into the slot and snap into place. in the slot.
  • the limiting part includes a plurality of slots
  • a side of the second adapter part facing the insulative body includes a plurality of plug-in parts, each plug-in part can extend into one of the slots and snap into place. inside the tank.
  • the limiting part includes one of the plug-in part and the slot
  • the second adapter part includes the other of the plug-in part and the slot
  • the plug-in part can extend Insert into the slot and snap into the slot, so that the limiting part and the second transfer part can be connected through the plug-in part and the slot of the plug-in fit, thereby limiting the position of the second transfer part and avoiding the second transfer part.
  • the joint moves relative to the insulating piece, reducing the risk of fatigue fracture of the adapter.
  • the application provides a battery cell, including: a casing having an opening; an electrode assembly disposed in the casing, the electrode assembly including tabs; and the above-mentioned end cap assembly, the end cap being configured to cover the opening and It is connected with the shell, and the second adapter part is electrically connected with the tab.
  • the present application provides an electrical device, including the above-mentioned battery cell, and the battery cell is used to provide electric energy.
  • Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application.
  • Figure 2 is a schematic structural diagram of a battery provided by an embodiment of the present application.
  • Figure 3 is a schematic diagram of the exploded structure of a battery cell provided by an embodiment of the present application.
  • Figure 4 is a top view of an end cap assembly provided by an embodiment of the present application.
  • Figure 5 is a cross-sectional view along the A-A direction in Figure 4.
  • Figure 6 is a schematic structural diagram of an insulating member according to an embodiment of the present application.
  • Figure 7 is a partial enlarged schematic view of B in Figure 6;
  • Figure 10 is a schematic structural diagram of an insulating member provided by another embodiment of the present application.
  • 234-Insulation piece 2341-Insulating body; 2342-Limiting part; 2342a-Latching protrusion; 2342b-Connector; 2342c-Slot; 2342d-Adhesive; 2343-Support part; 2344-Separating ring; 2345 -avoidance clearance;
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present 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. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • multiple refers to more than two (including two).
  • multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to It is more than two pieces (including two pieces).
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. . As the application fields of power batteries continue to expand, their market demand is also constantly expanding.
  • the battery 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 a casing, an electrode assembly, an electrolyte and an end cap assembly.
  • the electrode terminal of the end cap assembly is electrically connected to the tab of the electrode assembly through its adapter.
  • the adapter in order to facilitate assembly, the adapter is usually bent. During the use of battery cells, the bends of the adapters are prone to fatigue, which may lead to the risk of breakage and affect the safety performance of the end cap assembly and the battery cells it is used in.
  • the applicant conducted further in-depth research and found that the tabs are flexible parts, and the battery cells will cause the tabs to be at the height of the battery cells during vibration and impact. direction, thereby pulling the adapter to move along the height direction, causing fatigue at the bend of the adapter, which in turn causes the adapter to break, bringing serious consequences to the end cap assembly and the battery cells used in it. Security risks.
  • the adapter can be restricted in design to prevent it from moving under the action of external forces such as tabs, thereby reducing the risk of breakage.
  • the first adapter portion of the adapter is used to connect to the electrode terminal and the second adapter portion is used to connect to the tab, thereby electrically connecting the tab to the electrode terminal.
  • the arrangement of the insulating member can insulate the end cover and the adapter from each other through its insulating body, and by making the insulating member include a limiting portion, the limiting portion can be used to limit the movement of the second adapter portion relative to the insulating member, preventing The second adapter part moves under the action of external force, thereby preventing the adapter from fatigue and breaking under external forces such as pole tabs, thereby improving the safety performance of the end cover assembly and the battery cells to which it is applied.
  • Electrical devices can be vehicles, cell phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, etc.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.
  • spacecraft include aircraft, rockets, space shuttles, spaceships, etc.
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • Electric drills Electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • 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, to meet the power requirements for starting, navigation and driving of 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 .
  • Figure 2 is a schematic structural diagram of a battery provided by an embodiment of the present application
  • Figure 3 is a schematic exploded structural diagram of a battery cell provided by an embodiment 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 13.
  • 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 is accommodated in the box 10 .
  • the battery 100 can also be in the form of a battery module in which a plurality of battery cells 20 are first connected in series, in parallel, or in a mixed manner, and then the plurality of battery modules are connected in series, in parallel, or in a mixed manner 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.
  • the battery cell 20 refers to the smallest unit that constitutes the battery.
  • the battery cell 20 includes a case 21 , an electrode assembly 22 and an end cap assembly 23 .
  • the housing 21 can be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 21 can be determined according to the specific shape and size of the electrode assembly 22.
  • the housing 21 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 embodiments 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 21 .
  • the electrode assembly 22 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and usually a separator is provided between the positive electrode sheets and the negative electrode sheets.
  • the portions of the positive electrode sheet and the negative electrode sheet that contain active material constitute the main body of the electrode assembly 22
  • the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material constitute the tabs 221 respectively.
  • the positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively located at both ends of the main body.
  • the positive active material and the negative active material react with the electrolyte, and the tabs 221 are connected to the electrode terminals 232 to form a current loop.
  • the end cover assembly 23 refers to a component that covers the opening of the housing 21 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap assembly 23 may be adapted to the shape of the housing 21 to fit the housing 21 .
  • the end cap assembly 23 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap assembly 23 is less likely to deform when subjected to extrusion and collision, so that the battery cell 20 can have better performance. With high structural strength, safety performance can also be improved.
  • Figure 4 is a top view of the end cap assembly provided by an embodiment of the present application.
  • Figure 5 is a cross-sectional view along the A-A direction in Figure 4.
  • Figure 6 is an insulator of an embodiment of the present application. Structural diagram;
  • Figure 7 is a partial enlarged schematic diagram of B in Figure 6.
  • the end cap assembly 23 provided in the embodiment of the present application includes an end cap 231, an electrode terminal 232, an adapter 233 and an insulator 234.
  • the electrode terminal 232 is provided on the end cap 231.
  • the adapter 233 includes a first adapter part 2331 and a second adapter part 2332.
  • the first adapter part 2331 is used to connect to the electrode terminal 232
  • the second adapter part 2332 is used to connect to the tab 221.
  • the insulating member 234 includes an insulating body 2341 and a limiting portion 2342.
  • the insulating body 2341 is used to insulate the end cover 231 from the adapter 233.
  • the limiting portion 2342 is used to limit the movement of the second adapter portion 2332 relative to the insulating member 234.
  • the adapter 233 may be disposed on a side of the end cap 231 close to the electrode assembly 22 for electrically connecting the electrode assembly 22 and the electrode terminal 232.
  • the adapter 233 may be configured to be foldable. In other words, the adapter 233 has an unfolded state and a folded state in which the battery cell 20 is not assembled into a finished product. When the battery cell 20 is assembled, the adapter 233 is in an unfolded state, and after the battery unit 20 is assembled, the adapter 233 is in a folded state.
  • the adapter 233 includes a first adapter part 2331 and a second adapter part 2332.
  • the first adapter part 2331 and the second adapter part 2332 are arranged along the first direction Y, and the first adapter part 2331 and the second adapter part 2332 are arranged along the first direction Y.
  • the adapter part 2331 is bendable relative to the second adapter part 2332, and a crease is formed after the two adapter parts are bent. That is, the first adapter part 2331 and the second adapter part 2332 are relatively bent at the crease.
  • the first adapter part 2331 and the second adapter part 2332 are in a folded state.
  • the second adapter portion 2332 covers the end surface of the electrode assembly 22 , and the first adapter portion 2331 is stacked on the side of the second adapter portion 2332 away from the electrode assembly 22 .
  • first adapter part 2331 and the electrode terminal 232 can be connected to each other by welding, riveting, etc.
  • the second adapter part 2332 and the tab 221 can be connected to each other by welding or other methods.
  • the insulating body 2341 of the insulating member 234 may be at least partially disposed between the end cover 231 and the adapter 233 so that the end cover 231 and the adapter 233 are insulated.
  • the limiting portion 2342 is used to limit the movement of the second adapter portion 2332 relative to the insulator 234 , and optionally can limit the movement of the second adapter portion 2332 relative to the insulator 234 in the thickness direction X of the end cover 231 or the electrode.
  • the axial movement of the lead-out hole 2331 can also limit the movement of the second adapter 2332 in the direction intersecting the thickness direction X, for example, in the direction perpendicular to the thickness direction X, that is, the radial movement of the electrode lead-out hole 2331 .
  • the limiting part 2342 and the insulating body 2341 may be of an integrated structure, or of course, may be of a separate structure.
  • the limiting portion 2342 may contact the second adapter portion 2332 and limit the movement of the second adapter portion 2332 relative to the insulating member 234 .
  • the limiting portion 2342 can provide a limiting portion for the second adapter portion 2332 in the thickness direction X to limit the movement of the limiting portion 2342 relative to the insulating member 234 .
  • the limiting part 2342 may contact the surface of the second adapter part 2332 facing the electrode terminal 232 in the thickness direction The surface facing away from the electrode terminal 232 in the direction X contacts and provides a limit.
  • the limiting part 2342 may include a protruding structure protruding from the insulating body 2341, may include one of a plug-in part or a slot, and of course may also be in the form of an adhesive, as long as it can be connected to the second
  • the adapter portion 2332 provides a limit, resists the force from the tab 221 and other structures, and prevents the second adapter portion 2332 from moving relative to the insulator 234 .
  • the electrode terminal 232 is provided on the end cover 231.
  • the first adapter portion 2331 of the adapter 233 is used to connect to the electrode terminal 232, and the second adapter portion 2332 is used to connect to the electrode terminal.
  • the tabs 221 are connected, thereby electrically connecting the tabs 221 and the electrode terminals 232 .
  • the insulating member 234 can insulate the end cover 231 and the adapter 233 from each other through its insulating body 2341, and limit the movement of the second adapter 2332 relative to the insulating member 234 through its limiting portion 2342 to avoid the second
  • the adapter part 2332 moves under the action of external force, thus preventing the adapter 233 from fatigue and breaking, thereby improving the safety performance of the end cover assembly 23 and the battery cells to which it is applied.
  • the limiting portion 2342 includes a snap-in protrusion 2342a, which is used to restrict the second adapter portion 2332 from moving away from the electrode terminal in the thickness direction 232 direction movement.
  • the number of the engaging protrusions 2342a may be one, or may be more than two. When the number is more than two, the two or more engaging protrusions 2342a may be spaced around the second adapter part 2332 or distributed one after another. .
  • the locking protrusion 2342a may include a protrusion protruding from the insulating body 2341 in the thickness direction X of the end cover 231 .
  • the connecting portion 2332 moves in the direction away from the electrode terminal 232 in the axial direction of the electrode lead-out hole 2331 .
  • the snap-in protrusion 2342a can be used to provide the second adapter portion 2332 with a limit in the thickness direction
  • the two adapter portions 2332 move along the thickness direction X away from the electrode terminal 232 under the action of external force.
  • the adapter 233 is prevented from being pulled, fatigued, and broken.
  • the surface aa where the latch protrusion 2342a contacts the second adapter portion 2332 is a flat surface.
  • the latching protrusion 2342a can be made to extend in the thickness direction X toward the surface aa of the second adapter portion 2332 in a direction perpendicular to the thickness direction X.
  • the surface bb of the latch protrusion 2342a facing away from the insulating body 2341 is an inclined surface, and the inclined surface is inclined to the second adapter part 2332.
  • the surface bb of the latch protrusion 2342a facing away from the insulating body 2341 in the thickness direction X of the end cover 231 may be an inclined surface.
  • the surface of the engaging protrusion 2342a that contacts the second adapter portion 2332 and the surface of the engaging protrusion 2342a facing away from the insulating body 2341 are arranged to intersect.
  • the connecting body 2342b, the insulating body 2341 and the clamping protrusion 2342a may have an integrated structure, or of course may be formed separately and then connected to each other.
  • first direction Y and the thickness direction X of the end cap 231 may intersect, or may optionally be perpendicular to each other.
  • first direction Y can also be understood as the radial direction of the electrode lead-out hole 2331.
  • the connecting body 2342b may be used to limit the radial movement of the second adapter part 2332 along the electrode lead hole 2331.
  • the limiting part 2342 also includes a connecting body 2342b, so that the clamping protrusion 2342a can be connected to the insulating body 2341 through the connecting body 2342b, ensuring that the clamping protrusion 2342a is connected to the second rotating body.
  • the connecting body 2342b can also restrict the movement of the second adapter portion 2332 along the first direction Y, so that the relative position of the second adapter portion 2332 and the insulating member 234 is fixed, which can further improve the position limitation of the second adapter portion 2332 , reducing the probability of fatigue damage of the adapter 233.
  • the supporting portion 2343 protrudes from the surface of the insulating body 2341 facing the second adapter portion 2332 and is used for limiting The second adapter part 2332 moves toward the side where the electrode terminal 232 is located.
  • the supporting portion 2343 may protrude from the surface of the insulating body 2341 facing the second adapter portion 2332 in the thickness direction X of the end cover 231 .
  • the support part 2343 may be in the form of a solid or hollow block structure.
  • the support portion 2343 can abut against the adapter 233 for restricting the second adapter portion 2332 of the adapter 233 from running along the thickness direction X.
  • the support part 2343 may adopt an arc-shaped structure.
  • the number of supporting parts 2343 may be one, or of course, it may be more than two.
  • the two or more supporting parts 2343 may be spaced apart around part of the adapter 233.
  • the insulating member 234 further includes a supporting portion 2343, and the supporting portion 2343 protruding from the insulating body 2341 can limit the movement of the second adapter portion 2332 to the side where the electrode terminal 232 is located. This further prevents the second adapter portion 2332 from moving toward the electrode terminal 232 due to the internal pressure of the battery cell, restricts the relative position of the second adapter portion 2332 to the insulator 234, and avoids fatigue damage of the adapter 233.
  • the end cap assembly 23 provided by the embodiment of the present application has more than two limiting portions 2342 , and the two or more limiting portions 2342 are spaced apart around the second adapter portion 2332 .
  • the number of limiting parts 2342 can be two, of course, it can also be three, four or even more, specifically according to the size of the limiting parts 2342 and the limiting requirements for the second adapter part 2332 set up.
  • the limiting portions 2342 may be spaced and evenly distributed around the second adapter portion 2332 .
  • the supporting part 2343 and the limiting part 2342 can jointly limit the movement of the second adapter part 2332 relative to the insulating member 234 .
  • the insulating member 234 further includes a separation ring 2344 disposed on the periphery of the limiting portion 2342, and an avoidance gap 2345 is formed between the separation ring 2344 and the limiting portion 2342.
  • the separation ring 2344 is used to limit the lateral displacement of the adapter 233 and the like (ie, in the thickness direction X perpendicular to the end cover 231) to reduce the risk of short circuit.
  • the separation ring 2344 protrudes in a direction closer to the electrode assembly 22 relative to the insulating body 2341 and is provided on the periphery of the adapter 233 to prevent the adapter 233 from contacting the case 21 and to prevent the battery cell 20 from shaking or transferring.
  • the adapter component 233 comes into contact with the housing 21, causing a short circuit problem.
  • the end cap assembly 23 provided in the embodiment of the present application can limit the lateral displacement of structures such as the adapter 233 through the separation ring 2344. At the same time, the existence of the avoidance gap 2345 facilitates the installation of the adapter 233. The deformation of the limiting part 2342 ensures the installation requirements of the adapter 233.
  • Figure 8 is a schematic structural diagram of an end cap assembly provided by another embodiment of the present application.
  • Figure 9 is a schematic structural diagram of an adapter provided by another embodiment of the present application.
  • Figure 10 is a schematic structural diagram of an adapter provided by another embodiment of the present application.
  • the embodiment provides a schematic structural diagram of the insulating component.
  • the limiting part 2342 may include one of the inserting part 2332a and the slot 2342c, and the second adapter part 2332 includes the inserting part 2332a And the other one in the slot 2342c, the plug portion 2332a can extend into the slot 2342c and be locked in the slot 2342c.
  • the second adapter part 2332 may include the insertion part 2332a, so that the limiting part 2342 includes the slot 2342c.
  • the plug-in part 2332a can be extended by a predetermined length along the thickness direction X of the end cover 231, the slot 2342c has an opening along the thickness direction Realize the limit in the thickness direction X.
  • the number of plug portions 2332a and slots 2342c can be equal and provided in one-to-one correspondence.
  • the number of plug-in parts 2332a may be more than two, and the number of corresponding slots 2342c may also be more than two, and each plug-in part 2332a may be plug-connected to one of the slots 2342c.
  • the limiting part 2342 includes one of the plug-in part 2332a and the slot 2342c
  • the second adapter part 2332 includes the other of the plug-in part 2332a and the slot 2342c.
  • the plug-in part 2332a can extend into the slot 2342c and be locked in the slot 2342c, so that the limiting part 2342 and the second adapter part 2332 can be connected through the plug-in part 2332a and the slot 2342c, thereby achieving Limiting the position of the second adapter part 2332 prevents the second adapter part 2332 from moving relative to the insulating member 234 and reduces the risk of fatigue fracture of the adapter part 233.
  • FIG. 11 is a cross-sectional view of an end cap assembly provided by yet another embodiment of the present application.
  • the limiting portion 2342 includes an adhesive 2342d, and the adhesive 2342d is adhesively connected to the insulating body 2341 and the second adapter portion 2332.
  • the surface of the second adapter portion 2332 facing the electrode terminal 232 in the thickness direction X of the end cover 231 and the surface of the insulating body 2341 facing the electrode assembly 22 in the thickness direction Connect.
  • the limiting part 2342 by causing the limiting part 2342 to include an adhesive 2342d, the relative position between the second adapter part 2332 and the insulating body 2341 can be fixed through the adhesive 2342d, thereby defining the second The adapter part 2332 moves relative to the insulator 234, and the connection strength is high. There is no need to make too many improvements to the insulator 234 and the second adapter part 2332, and the modification cost is low.
  • the first adapter part 2331 is electrically connected to the electrode terminal 232, and the second adapter part 2332 is used to electrically connect to the tab 221.
  • the adapter 233 is disposed on the side of the insulating member 234 facing the electrode assembly 22 .
  • the insulating member 234 includes an insulating body 2341, a limiting portion 2342, a supporting portion 2343 and a separation ring 2344.
  • the limiting portion 2342 includes a snap protrusion 2342a and a connector 2342b.
  • the insulating body 2341 is used to connect the end cover 231 to the adapter 233 Insulation settings.
  • the connecting body 2342b is used to connect the clamping protrusion 2342a and the insulating body 2341 and restrict the movement of the second adapter part 2332 along the first direction Y.
  • the first direction Y intersects the thickness direction X of the end cover 231.
  • the clamping protrusion 2342a and The contact surface of the second adapter part 2332 is a flat surface, and the surface of the engaging protrusion 2342a away from the insulating body 2341 is an inclined surface.
  • the inclined surface is inclined to the second adapter part 2332, and the support part 2343 protrudes from the insulative body 2341 toward the second adapter part 2332.
  • the surface of the adapter portion 2332 is used to limit the movement of the second adapter portion 2332 to the side where the electrode terminal 232 is located.
  • the present application also provides an electrical device, including the battery cell described in any of the above solutions, and the battery cell is used to provide electrical energy to the electrical device.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请提供一种端盖组件、电池单体、电池以及用电装置，端盖组件包括：端盖；电极端子，设置于端盖；转接件，包括第一转接部以及第二转接部，第一转接部用于与电极端子连接，第二转接部用于与极耳连接；绝缘件，包括绝缘本体以及限位部，绝缘本体用于将端盖与转接件绝缘设置，限位部用于限制第二转接部相对绝缘件运动。本申请的转接件不易断裂，安全性能高。

Description

端盖组件、电池单体、电池以及用电装置 技术领域
本申请涉及电池领域，特别涉及一种端盖组件、电池单体、电池以及用电装置。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。
电池包括有电池单体，已有电池单体，其端盖组件用于与极耳连接的转接件存在断裂的风险，影响电池单体的安全性。
发明内容
鉴于上述问题，本申请提供一种端盖组件、电池单体、电池以及用电装置，端盖组件的转接件不易断裂，安全性能高。
第一方面，本申请提供了一种端盖组件，包括：端盖；电极端子，设置于端盖；转接件，包括第一转接部以及第二转接部，第一转接部用于与电极端子连接，第二转接部用于与极耳连接；绝缘件，包括绝缘本体以及限位部，绝缘本体用于将端盖与转接件绝缘设置，限位部用于限制第二转接部相对绝缘件运动。
本申请实施例的技术方案中，端盖组件包括端盖、电极端子、转接件以及绝缘件。电极端子设置在端盖上，转接件的第一转接部用于与电极端子连接且第二转接部用于与极耳连接，进而使得极耳与电极端子电连接。绝缘件的设置，可以通过其绝缘本体将端盖与转接件彼此之间绝缘设置，并且通过其限位部限制第二转接部相对绝缘件运动，避免第二转接部在外力的作用下运动被折弯、拉拽等，进而避免转接件发生疲劳作用产生断裂现象，提高端盖组件及其所应用的电池单体的安全性能。
在一些实施例中，限位部包括卡接凸起，在端盖的厚度方向，卡接凸起用于限制第二转接部向背离电极端子的方向运动。
本申请实施例的提供的端盖组件，通过使得限位部包括卡接凸起，可以利用卡接凸起向第二转接部提供在厚度方向的限位，避免第二转接部在外力的作用下沿着厚度方向背离电极端子的方向运动。以有效抵抗极耳等构件等外部构件的拉力作用，避免转接件被拉扯发生疲劳作用产生断裂现象。
在一些实施例中，卡接凸起与第二转接部接触的面为平面。
本申请实施例提供的端盖组件，通过使得卡接凸起与第二转接部接触的面为平面，能够增加卡接凸起与第二转接部之间的接触面积，增强卡接凸起对第二转接部的限位效果，避免第二转接部在外力的作用下相对绝缘件运动。
在一些实施例中，卡接凸起背离绝缘本体的面为倾斜面，倾斜面向第二转接部倾斜设置。
本申请实施例提供的端盖组件，通过使得卡接凸起背离绝缘本体的表面为倾斜面，使得转接件在压入卡接凸起以及电极端子之间时，能够向转接件提供导向，利于转接件的装配。
在一些实施例中，限位部还包括连接体，连接体用于连接卡接凸起以及绝缘本体并限制第二转接部沿第一方向运动，第一方向与厚度方向相交。
本申请实施例提供的端盖组件，通过使得限位部还包括连接体，能够通过连接体将卡接凸起与绝缘本体连接，保证卡接凸起与第二转接部之间的相对位置。同时，连接体还能够限制第二转接部沿第一方向运动，使得第二转接部与绝缘件的相对位置固定，能够进一步提高对第二转接部的位置限定，降低转接件的疲劳损坏的概率。
在一些实施例中，绝缘件还包括支撑部，支撑部凸出于绝缘本体朝向第二转接部的表面并用于限制第二转接部向电极端子所在侧运动。
在一些实施例中，限位部设置于支撑部，限位部在支撑部背离电极端子的一侧凸出于支撑部设置。
本申请实施例提供的端盖组件，通过使得绝缘件还包括支撑部，通过凸出于绝缘本体设置的支撑部能够限制第二转接部向电极端子所在侧运动，进而避免第二转接部在电池内部压力等作用下向电极端子侧运动，限制第二转接部于绝缘件的相对位置，避免转接件疲劳损坏。
在一些实施例中，限位部的数量为两个以上，两个以上限位部围绕第二转接部间隔分布。
本申请实施例提供的端盖组件，通过使得限位部的数量为两个以上，并且两个以上限位部围绕第二转接部间隔分布，能够通过两个以上限位部对第二转接部进行限位，有效的降低第二转接部在电池单体内部压力等外作用下向电极端子侧运动。
在一些实施例中，绝缘件还包括分隔环，分隔环设置于限位部的外围，分隔环与限位部之间形成有避让间隙。
本申请实施例提供的端盖组件，通过设置分隔环，能够通过分隔环限制对转接件等结构的横向位移，同时，避让间隙的存在使得转接件在安装时利于限位部的形变，保证转接件的安装需求。
在一些实施例中，限位部包括插接部以及插槽中的一者，第二转接部包括插接部以及插槽中的另一者，插接部能够伸入插槽并卡接于插槽内。
在一些实施例中，限位部包括多个插槽，第二转接部朝向绝缘本体的一侧包括多个插接部，每个插接部能够伸入其中一个插槽并卡接于插槽内。
本申请实施例提供的端盖组件，通过使得限位部包括插接部以及插槽中的一者，第二转接部包括插接部以及插槽中的另一者，插接部能够伸入插槽并卡接于插槽内，能够使得限位部与第二转接部通过插接配合的插接部以及插槽连接，实现对第二转接部的限位，避免第二转接部相对于绝缘件运动，降低转接件疲劳断裂的风险。
在一些实施例中，限位部包括粘接剂，粘接剂与绝缘本体以及第二转接部粘接连接。
本申请实施例提供的端盖组件，通过使得限位部包括粘接剂，能够通过粘接剂固定第二转接部与绝缘本体之间的相对位置，进而限定第二转接部相对绝缘件运动，连接强度高，且无需对绝缘件以及第二转接部做过多的改进，改造成本低。
第二方面，本申请提供了一种电池单体，包括：壳体，具有开口；电极组件，设置于壳体内，电极组件包括极耳；上述的端盖组件，端盖被配置为覆盖开口并与壳体连接，第二转接部与极耳电连接。
第三方面，本申请提供了一种电池，包括箱体以及多个上述的电池单体，电池单体容纳于箱体内。
第四方面，本申请提供了一种用电装置，包括上述的电池单体，电池单体用于提供电能。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1是本申请一实施例提供的车辆的结构示意图；
图2是本申请一实施例提供的电池的结构示意图；
图3是本申请一实施例提供的一种电池单体的分解结构示意图；
图4是本申请一实施例提供的端盖组件的俯视图；
图5是图4中沿A-A方向的剖视图；
图6是本申请一实施例的绝缘件的结构示意图；
图7是图6中B处的局部放大示意图；
图8是本申请另一实施例提供的端盖组件的结构示意图；
图9是本申请另一实施例提供的转接件的结构示意图；
图10是本申请另一实施例提供的绝缘件的结构示意图；
图11是本申请又一个实施例提供的端盖组件的剖视图。
具体实施方式中的附图标号如下：
1000-车辆；
100-电池；200-控制器；300-马达；
10-箱体；11-第一部分；12-第二部分；13-容纳空间；
20-电池单体；
21-壳体；
22-电极组件；221-极耳；
23-端盖组件；
231-端盖；2331-电极引出孔；
232-电极端子；
233-转接件；2331-第一转接部；2332-第二转接部；2332a-插接部；2332b-凹槽；
234-绝缘件；2341-绝缘本体；2342-限位部；2342a-卡接凸起；2342b-连接体；2342c-插槽；2342d-粘接剂；2343-支撑部；2344-分隔环；2345-避让间隙；
235-连接块；
X-厚度方向；Y-第一方向。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术 人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
本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。
电池单体包括壳体、电极组件、电解液以及端盖组件。端盖组件的电极端子通过其转接件与电极组件的极耳电连接。
本申请人注意到，为了方便装配，转接件一般会弯折设置。电池单体在使用过程中，其的转接件的弯折处易发生疲劳作用，进而产生断裂风险，影响端盖组件及其所应用的电池单体的安全性能。
为了缓解转接件易发生疲劳作用，进而产生断裂风险的问题，申请人做了进一 步深入研究发现，极耳为柔性件，电池单体在振动冲击中，会使得极耳在电池单体的高度方向上压缩或伸长，从而拉动转接件沿高度方向运动，使得转接件的弯折处发生疲劳作用，进而导致转接件断裂，给端盖组件及其所用的电池单体带来了安全隐患。
为了缓解转接件断裂的问题，申请人研究发现，可以在设计上对转接件进行限制，避免其在极耳等外力作用下运动，进而降低其断裂风险。
基于以上考虑，为了解决转接件疲劳断裂问题，发明人经过深入研究，设计了一种端盖组件，端盖组件包括端盖、电极端子、转接件以及绝缘件。电极端子设置于端盖，转接件包括第一转接部以及第二转接部，第一转接部用于与电极端子连接，第二转接部用于与极耳连接。绝缘件包括绝缘本体以及限位部，绝缘本体用于将端盖与转接件绝缘设置，限位部用于限制第二转接部相对绝缘件运动。
在这样的端盖组件中，转接件的第一转接部用于与电极端子连接且第二转接部用于与极耳连接，进而使得极耳与电极端子电连接。绝缘件的设置，可以通过其绝缘本体将端盖与转接件彼此之间绝缘设置，并且通过使得绝缘件包括限位部，能够利用限位部限制第二转接部相对绝缘件运动，避免第二转接部在外力的作用下运动，进而避免转接件在承受极耳等外力下发生疲劳作用产生断裂现象，提高端盖组件及其所应用的电池单体的安全性能。
本申请实施例描述的技术方案适用于电池单体、电池以及用电装置。
用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述用电装置不做特殊限制。
应理解，本申请实施例描述的技术方案不仅仅局限适用于上述所描述的电池单体、电池以及用电装置，还可以适用于所有包括端盖组件的电池以及使用电池的用电设备，但为描述简洁，下述实施例均以电动车辆为例进行说明。
请参照图1，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以及图3，图2为本申请一实施例提供的电池的结构示意图；图3为本申请一实施例提供的一种电池单体的分解结构示意图。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13。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13。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之间的电连接。
其中，每个电池单体20可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体20可呈圆柱体、扁平体、长方体或其它形状等。
请参照图3，电池单体20是指组成电池的最小单元。电池单体20包括有壳体21、电极组件22以及端盖组件23。
壳体21是用于配合端盖组件23以形成电池单体20的内部环境的组件，其中，形成的内部环境可以用于容纳电极组件22、电解液以及其他部件。壳体21和端盖组件23可以是独立的部件，可以于壳体21上设置开口，通过在开口处使端盖组件23盖合开口以形成电池单体20的内部环境。不限地，也可以使端盖组件23和壳体21一体化，具体地，端盖组件23和壳体21可以在其他部件入壳前先形成一个共同的连接面，当需要封装壳体21的内部时，再使端盖组件23盖合壳体21。壳体21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21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21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21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，正极片和负极片不具有活性物质的部分各自构成极耳221。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳221连接电极端子232以形成电流回路。
端盖组件23是指盖合于壳体21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，端盖组件23的形状可以与壳体21的形状相适应以配合壳体21。可选地，端盖组件23可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖组件23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。
壳体21的开口的数量可以为一个，当然也可以为两个，当为两个时，两个开口相对设置，每个开口处均可以盖合一个端盖组件23，每个端盖组件23与其中一个极耳221电连接。
请参照图4至图7所示，图4为本申请一实施例提供的端盖组件的俯视图，图5为图4中沿A-A方向的剖视图；图6为本申请一实施例的绝缘件的结构示意图；图7为图6中B处的局部放大示意图。
本申请实施例提供的端盖组件23包括端盖231、电极端子232、转接件233以及绝缘件234，电极端子232设置于端盖231。转接件233包括第一转接部2331以及第二转接部2332，第一转接部2331用于与电极端子232连接，第二转接部2332用于与极耳221连接。绝缘件234包括绝缘本体2341以及限位部2342，绝缘本体2341用于将端盖231与转接件233绝缘设置，限位部2342用于限制第二转接部2332相对绝缘件234运动。
可选地，端盖231的材质可以是多种的，比如，铜、铁、铝、不锈钢、铝合金等。
可选地，端盖231可以为圆形、方形板状结构体。
可选地，端盖231上设有电极引出孔2331，电极引出孔2331可以沿端盖231的厚度方向X贯穿端盖231设置。电极端子232伸入电极引出孔2331中，实现与端盖231的连接。电极引出孔2331中还可以设有密封圈，以实现电极端子232与端盖231之间的密封。
可选地，转接件233可以设置于端盖231靠近电极组件22的一侧，用于电连 接电极组件22与电极端子232。在电池单体20为圆柱电池等情况下，转接件233可以被构造为可折叠的，换句话说，转接件233具有展开状态和折叠状态，其中，未被组装成电池单体20成品时，转接件233处于展开状态，而在组装成电池单体20成品后，转接件233则处于折叠状态。
可选地，转接件233包括第一转接部2331以及第二转接部2332，在展开状态，第一转接部2331和第二转接部2332沿着第一方向Y排列，第一转接部2331相对于第二转接部2332可弯折，二者弯折后形成折痕，即第一转接部2331和第二转接部2332在折痕处相对弯折。第一转接部2331沿折痕相对于第二转接部2332弯折后，第一转接部2331和第二转接部2332之间呈折叠状态。处于折叠状态时，第二转接部2332覆盖在电极组件22的端面上，而第一转接部2331则叠置于第二转接部2332的远离电极组件22的一侧。
可选地，第一转接部2331与电极端子232可以采用焊接、铆接等方式相互连接，第二转接部2332与极耳221之间可以采用焊接等方式相互连接。
可选地，绝缘件234的绝缘本体2341可以至少部分设置在端盖231与转接件233之间，以使得端盖231与转接件233之间绝缘设置。
可选地，限位部2342用于限制第二转接部2332相对于绝缘件234运动，可选可以限制第二转接部2332相对于绝缘件234在端盖231的厚度方向X或者说电极引出孔2331的轴向运动，当然，还可以限制第二转接部2332沿与厚度方向X相交的方向运动，例如，沿与厚度方向X相垂直的方向，即电极引出孔2331的径向移动。
可选地，限位部2342与绝缘本体2341可以为一体式结构，当然，也可以为分体式结构。
可选地，限位部2342可以与第二转接部2332接触并限制第二转接部2332相对于绝缘件234运动。
可选地，限位部2342可以在厚度方向X上给第二转接部2332提供限位，以限制限位部2342相对于绝缘件234运动。
可选地，限位部2342可以与第二转接部2332在厚度方向X上朝向电极端子232的表面接触并提供限位，当然，限位部2342也可以与第二转接部2332在厚度方向X上背离电极端子232的表面接触并提供限位。
可选地，限位部2342可以包括凸出于绝缘本体2341设置的凸起结构，可以包括插接部或者插槽中的一者，当然还可以包括粘接剂的形式，只要能够向第二转接部2332提供限位，抵抗来自极耳221等结构的作用力，避免第二转接部2332相对于绝缘件234运动均可。
本申请实施例提供的端盖组件23，电极端子232设置在端盖231上，转接件233的第一转接部2331用于与电极端子232连接且第二转接部2332用于与极耳221 连接，进而使得极耳221与电极端子232电连接。绝缘件234的设置，可以通过其绝缘本体2341将端盖231与转接件233彼此之间绝缘设置，并且通过其限位部2342限制第二转接部2332相对绝缘件234运动，避免第二转接部2332在外力的作用下运动，进而避免转接件233发生疲劳作用产生断裂现象，提高端盖组件23及其所应用的电池单体的安全性能。
根据本申请的一些实施例，可选地，限位部2342包括卡接凸起2342a，在端盖231的厚度方向X，卡接凸起2342a用于限制第二转接部2332向背离电极端子232的方向运动。
可选地，卡接凸起2342a的数量可以为一个，也可以为两个以上，当为两个以上时，两个以上卡接凸起2342a可以为围绕第二转接部2332间隔或者相继分布。
可选地，卡接凸起2342a可以包括端盖231的厚度方向X凸出于绝缘本体2341设置凸部。
可选地，在端盖231的厚度方向X，卡接凸起2342a用于限制第二转接部2332向背离电极端子232的方向运动，也就是说卡接凸起2342a用于限制第二转接部2332在电极引出孔2331的轴向上向背离电极端子232的方向运动。
本申请实施例的提供的端盖组件23，通过使得限位部2342包括卡接凸起2342a，可以利用卡接凸起2342a向第二转接部2332提供在厚度方向X的限位，避免第二转接部2332在外力的作用下沿着厚度方向X背离电极端子232的方向运动。以有效抵抗极耳221等构件等外部构件的拉力作用，避免转接件233被拉扯发生疲劳作用产生断裂现象。
根据本申请的一些实施例，可选地，卡接凸起2342a与第二转接部2332接触的面aa为平面。
可选地，可以使得卡接凸起2342a在厚度方向X上朝向第二转接部2332的表面aa为平面。
可选地，可以使得卡接凸起2342a在厚度方向X上朝向第二转接部2332的表面aa沿与厚度方向X相垂直的方向延展。
本申请实施例提供的端盖组件23，通过使得卡接凸起2342a与第二转接部2332接触的面aa为平面，能够增加卡接凸起2342a与第二转接部2332之间的接触面积，增强卡接凸起2342a对第二转接部2332的限位效果，避免第二转接部2332在外力的作用下相对绝缘件234运动。
根据本申请的一些实施例，可选地，卡接凸起2342a背离绝缘本体2341的面bb为倾斜面，倾斜面向第二转接部2332倾斜设置。
可选地，可以使得卡接凸起2342a在端盖231的厚度方向X背离绝缘本体2341的面bb为倾斜面。
可选地，在与厚度方向X相垂直的方向，也可以理解为电极引出孔2331的径向上，卡接凸起2342a在厚度方向X的尺寸由远离第二转接部2332的一侧朝向第二转接部2332的一侧逐渐增大。
可选地，卡接凸起2342a与第二转接部2332接触的表面以及卡接凸起2342a背离绝缘本体2341的面相交设置。
本申请实施例提供的端盖组件23，通过使得卡接凸起2342a背离绝缘本体2341的表面为倾斜面，使得转接件233在压入卡接凸起2342a以及电极端子232之间时，能够向转接件233提供导向，利于转接件233的装配。
根据本申请的一些实施例，可选地，限位部2342还包括连接体2342b，连接体2342b用于连接卡接凸起2342a以及绝缘本体2341并限制第二转接部2332沿第一方向Y运动，第一方向Y与厚度方向X相交。
可选地，连接体2342b与绝缘本体2341以及卡接凸起2342a之间可以是一体式结构，当然也可以是分体形成后相互连接。
可选地，连接体2342b的数量可以与卡接凸起2342a的数量相同并一对一设置，当然，也可以使得一个连接体2342b连接两个或者多个卡接凸起2342a。
可选地，第一方向Y与端盖231的厚度方向X可以相交，可选为可以相互垂直。可选地，第一方向Y也可以理解为电极引出孔2331的径向。
可选地，连接体2342b可以用于限制第二转接部2332沿电极引出孔2331的径向移动。
可选地，连接体2342b可以在端盖231的厚度方向X凸出于绝缘本体2341设置。
本申请实施例提供的端盖组件23，通过使得限位部2342还包括连接体2342b，能够通过连接体2342b将卡接凸起2342a与绝缘本体2341连接，保证卡接凸起2342a与第二转接部2332之间的相对位置。同时，连接体2342b还能够限制第二转接部2332沿第一方向Y运动，使得第二转接部2332与绝缘件234的相对位置固定，能够进一步提高对第二转接部2332的位置限定，降低转接件233的疲劳损坏的概率。
在一些可选地实施例中，本申请实施例提供的端盖组件23，绝缘件234还包括支撑部2343，支撑部2343凸出于绝缘本体2341朝向第二转接部2332的表面并用于限制第二转接部2332向电极端子232所在侧运动。
可选地，支撑部2343可以在端盖231的厚度方向X凸出于绝缘本体2341朝向第二转接部2332的表面。
可选地，支撑部2343可以呈实心或者空心的块状结构体。支撑部2343可以抵接在转接件233上，用于限制转接件233的第二转接部2332沿厚度方向X运行。
可选地，支撑部2343可以采用弧状结构体。支撑部2343的数量可以为一 个，当然也可以为两个以上，当为两个以上时，两个以上支撑部2343可以围绕部分转接件233间隔分布。
本申请实施例提供的端盖组件23，通过使得绝缘件234还包括支撑部2343，通过凸出于绝缘本体2341设置的支撑部2343能够限制第二转接部2332向电极端子232所在侧运动，进而避免第二转接部2332在电池单体内部压力等作用下向电极端子232侧运动，限制第二转接部2332于绝缘件234的相对位置，避免转接件233疲劳损坏。
在一些可选地实施例中，本申请实施例提供的端盖组件23，限位部2342的数量为两个以上，两个以上限位部2342围绕第二转接部2332间隔分布。
可选地，限位部2342的数量可以为两个，当然，也可以为三个、四个甚至更多个，具体可以根据限位部2342尺寸以及对第二转接部2332的限位要求设置。
可选地，限位部2342可以围绕第二转接部2332间隔且均匀分布。
本申请实施例提供的端盖组件23，通过使得限位部2342的数量为两个以上，并且两个以上限位部2342围绕第二转接部2332间隔分布，能够通过两个以上限位部2342对第二转接部2332进行限位，有效的降低第二转接部2332在电池单体内部压力等外作用下向电极端子232侧运动。
在一些可选地实施例中，在端盖231的厚度方向X，限位部2342可以同时凸出于绝缘本体2341以及支撑部2343设置。通过上述设置，能够利于支撑部2343与限位部2342共同限定第二转接部2332相对于绝缘件234运动。
在一些可选地实施例中，绝缘件234还包括分隔环2344，分隔环2344设置于限位部2342的外围，分隔环2344与限位部2342之间形成有避让间隙2345。
可选地，分隔环2344用于限制转接件233等的横向位移(即在垂直于端盖231的厚度方向X)，以降低短路风险。分隔环2344相对于绝缘本体2341向靠近电极组件22的方向凸出，并设置于转接件233的外围，以防止转接件233与壳体21接触，以免在电池单体20晃动、转接件233折偏等情况下，转接件233与壳体21发生接触，引发短路问题。
具体地，分隔环2344可以由绝缘本体2341向电极组件22一侧延伸至第二转接部2332的靠近电极组件22的一侧，使分隔环2344围设于第二转接部2332的外围。这样，处于折叠状态的转接件233，其整体均位于分隔环2344所限定的范围内，使得分隔环2344能够对转接件233的横向位移起到一定的限制作用，防止转接件233因横向位移过大，而与壳体21发生接触。
更具体地，一些实施例中，分隔环2344不仅延伸至第二转接部2332靠近电极组件22的一侧，还可以进一步延伸至极耳221的靠近端盖231的一端，此时，分隔环2344不仅围设于转接件233的外围，还围设于极耳221的靠近端盖231的一端的外 围，从而分隔环2344能在限制转接件233横向位移的同时，对电极组件22的横向位移也起到一定的限制作用，防止电极组件22因横向位移过大，而与壳体21发生接触，造成短路问题，并防止极耳221向壳体21发生弯折而造成短路的问题。
一些实施例中，分隔环2344被构造为一段连续的圆环，但同时，分隔环2344为非封闭的圆环，分隔环2344的两自由端之间设有伸出口，供处于展开状态的转接件233伸出。基于此，分隔环2344既能可靠地限制转接件233等的横向位移，降低短路风险，同时还能方便转接件233先以展开状态组装至端盖组件23中，之后再进行折叠。
一些实施例中，分隔环2344与限位部2342之间形成有避让间隙2345，可以理解为在与端盖231的厚度方向X相垂直的方向，分隔环2344与限位部2342间隔设置并形成有避让间隙2345。
本申请实施例提供的端盖组件23，通过使得分隔环2344，能够通过分隔环2344限制对转接件233等结构的横向位移，同时，避让间隙2345的存在使得转接件233在安装时利于限位部2342的形变，保证转接件233的安装需求。
请参阅图8至图10，图8为本申请另一实施例提供的端盖组件的结构示意图，图9为本申请另一实施例提供的转接件的结构示意图，图10本申请另一实施例提供的绝缘件的结构示意图。在一些可选地实施例中，本申请实施例提供的端盖组件23，限位部2342可以包括插接部2332a以及插槽2342c中的一者，第二转接部2332包括插接部2332a以及插槽2342c中的另一者，插接部2332a能够伸入插槽2342c并卡接于插槽2342c内。
可选地，可以使得限位部2342包括插槽2342c，同时使得第二转接部2332包括插接部2332a，当然，也可以使得限位部2342包括插接部2332a，第二转接部2332包括插槽2342c。插接部2332a能够深入插槽2342c并卡接于插槽2342c内，使得限位部2342限制第二转接部2332运动。
示例性地，由于第二转接部2332的厚度尺寸相对较小，可以第二转接部2332包括插接部2332a，使得限位部2342包括插槽2342c。
可选地，可以使得插接部2332a沿端盖231的厚度方向X延伸预定长度，插槽2342c沿厚度方向X具有开口，插接部2332a能够在厚度方向X插接于插槽2342c的内部，实现在厚度方向X上的限位。
可选地，沿端盖231的厚度方向X，可以使得插接部2332a呈变截面体，可选地，可以使得插接部2332a朝向插槽2342c一端的横截面尺寸大于远离插槽2342c一端的横截面尺寸。
可选地，可以使得第二转接部2332在厚度方向X上朝向电极端子232的一侧凸出设置形成插接部2332a，当包括支撑部2343时，可以使得支撑部2343呈空心结 构体，插槽2342c开设于支撑部2343在厚度方向X长朝向电极组件22的一侧。
可选地，插接部2332a与插槽2342c的数量可以相等并一一对应设置。一些可选地示例中，插接部2332a的数量可以为两个以上，相应的插槽2342c的数量也可以为两个以上，每个插接部2332a与其中一个插槽2342c插接连接。
可选地，插接部2332a可以通过对第二转接部2332沿厚度方向X冲压的方式形成，当插接部2332a采用冲压方式形成时，第二转接部2332对应每个插接部2332a的位置形成有凹槽2332b。
本申请实施例提供的端盖组件23，通过使得限位部2342包括插接部2332a以及插槽2342c中的一者，第二转接部2332包括插接部2332a以及插槽2342c中的另一者，插接部2332a能够伸入插槽2342c并卡接于插槽2342c内，能够使得限位部2342与第二转接部2332通过插接配合的插接部2332a以及插槽2342c连接，实现对第二转接部2332的限位，避免第二转接部2332相对于绝缘件234运动，降低转接件233疲劳断裂的风险。
请参阅图11，图11为本申请又一个实施例提供的端盖组件的剖视图。在一些可选地实施例中，本申请实施例提供的端盖组件23，限位部2342包括粘接剂2342d，粘接剂2342d与绝缘本体2341以及第二转接部2332粘接连接。
可选地，粘接剂2342d可以包括绝缘胶体，可以由液态可流动的胶液固化形成，当然，也可以包括双面均具有粘性的固态胶带形式。
可选地，可以使得第二转接部2332在端盖231的厚度方向X上朝向电极端子232的表面与绝缘本体2341在厚度方向X上朝向电极组件22的表面之间通过粘接剂2342d粘接连接。
本申请实施例提供的端盖组件23，通过使得限位部2342包括粘接剂2342d，能够通过粘接剂2342d固定第二转接部2332与绝缘本体2341之间的相对位置，进而限定第二转接部2332相对绝缘件234运动，连接强度高，且无需对绝缘件234以及第二转接部2332做过多的改进，改造成本低。
可以理解的是，本申请上述各实施例提供的端盖组件23，分别以限位部2342包括卡接凸起2342a、插接部2332a与插槽2342c中的一者、粘接剂2342d为例进行举例说明。限位部2342的各形式可以独立存在，当然也可以同时包括上述两者或者两者以上，例如限位部2342可以同时包括卡接凸起2342a以及粘接剂2342d、可以同时包括卡接凸起2342a以及插接部2332a与插槽2342c中的一者、或者可以同时包括粘接剂2342d、插接部2332a与插接中的一者，甚至同时包括卡接凸起2342a、插接部2332a与插槽2342c中的一者以及粘接剂2342d三者，具体可以根据对第二转接部2332的限位需求任意组合。
根据本申请的一些实施例，本申请提供了一种端盖组件23，端盖组件23包 括端盖231、电极端子232、转接件233以及绝缘件234，电极端子232设置于端盖231。端盖231可以呈圆形板状结构体，端盖231上设置有两个电极引出孔2331，每个电极引出孔2331内设置电极端子232，同一端盖231上的两个电极端子232通过连接块235连接。转接件233包括第一转接部2331以及第二转接部2332，第一转接部2331与电极端子232电连接，第二转接部2332用于与极耳221电连接。转接件233设置于绝缘件234朝向电极组件22的一侧设置。绝缘件234包括绝缘本体2341、限位部2342、支撑部2343以及分隔环2344，限位部2342包括卡接凸起2342a以及连接体2342b，绝缘本体2341用于将端盖231与转接件233绝缘设置。连接体2342b用于连接卡接凸起2342a以及绝缘本体2341并限制第二转接部2332沿第一方向Y运动，第一方向Y与端盖231的厚度方向X相交，卡接凸起2342a与第二转接部2332接触的面为平面，卡接凸起2342a背离绝缘本体2341的面为倾斜面，倾斜面向第二转接部2332倾斜设置，支撑部2343凸出于绝缘本体2341朝向第二转接部2332的表面并用于限制第二转接部2332向电极端子232所在侧运动，限位部2342设置于支撑部2343，限位部2342在支撑部2343背离电极端子232的一侧凸出于支撑部2343设置。限位部2342的数量为两个以上，两个以上限位部2342围绕第二转接部2332间隔分布。分隔环2344设置于限位部2342的外围，分隔环2344与限位部2342之间形成有避让间隙2345。通过限位部2342的卡接凸起2342a能够限制第二转接部2332在极耳221等外部构件作用下限定绝缘件234运动，降低转接件233疲劳断裂的风险。
根据本申请的一些实施例，本申请还提供了一种电池，包括以上任一方案所述的电池单体。
根据本申请的一些实施例，本申请还提供了一种用电装置，包括以上任一方案所述的电池单体，并且电池单体用于为用电装置提供电能。
用电装置可以是前述任一应用电池单体的设备或系统。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (15)

  1. 一种端盖组件，包括：
    端盖；
    电极端子，设置于端盖；
    转接件，包括第一转接部以及第二转接部，所述第一转接部用于与所述电极端子连接，所述第二转接部用于与极耳连接；
    绝缘件，包括绝缘本体以及限位部，所述绝缘本体用于将所述端盖与所述转接件绝缘设置，所述限位部用于限制所述第二转接部相对所述绝缘件运动。
  2. 根据权利要求1所述的端盖组件，其中，所述限位部包括卡接凸起，在所述端盖的厚度方向，所述卡接凸起用于限制所述第二转接部向背离所述电极端子的方向运动。
  3. 根据权利要求2所述的端盖组件，其中，所述卡接凸起与所述第二转接部接触的面为平面。
  4. 根据权利要求2或3所述的端盖组件，其中，所述卡接凸起背离所述绝缘本体的面为倾斜面，所述倾斜面向所述第二转接部倾斜设置。
  5. 根据权利要求2至4任意一项所述的端盖组件，其中，所述限位部还包括连接体，所述连接体用于连接所述卡接凸起以及所述绝缘本体并限制所述第二转接部沿第一方向运动，所述第一方向与所述厚度方向相交。
  6. 根据权利要求1至5任意一项所述的端盖组件，其中，所述绝缘件还包括支撑部，所述支撑部凸出于所述绝缘本体朝向所述第二转接部的表面并用于限制所述第二转接部向所述电极端子所在侧运动。
  7. 根据权利要求6所述的端盖组件，其中，所述限位部设置于所述支撑部，所述限位部在所述支撑部背离所述电极端子的一侧凸出于所述支撑部设置。
  8. 根据权利要求1至7任意一项所述的端盖组件，其中，所述限位部的数量为两个以上，两个以上所述限位部围绕所述第二转接部间隔分布。
  9. 根据权利要求1至8任意一项所述的端盖组件，其中，所述绝缘件还包括分隔环，所述分隔环设置于所述限位部的外围，所述分隔环与所述限位部之间形成有避让间隙。
  10. 根据权利要求1至9任意一项所述的端盖组件，其中，所述限位部包括插接部以及插槽中的一者，所述第二转接部包括所述插接部以及所述插槽中的另一者，所述插接部能够伸入所述插槽并卡接于所述插槽内。
  11. 根据权利要求10所述的端盖组件，其中，所述限位部包括多个所述插槽，所述第二转接部朝向所述绝缘本体的一侧包括多个所述插接部，每个所述插接部能够伸入其中一个所述插槽并卡接于所述插槽内。
  12. 根据权利要求1至11任意一项所述的端盖组件，其中，所述限位部包括粘接剂，所述粘接剂与所述绝缘本体以及所述第二转接部粘接连接。
  13. 一种电池单体，包括：
    壳体，具有开口；
    电极组件，设置于所述壳体内，所述电极组件包括极耳；
    如权利要求1至12所述的端盖组件，所述端盖被配置为覆盖所述开口并与所述壳体连接，所述第二转接部与所述极耳电连接。
  14. 一种电池，包括箱体以及多个如权利要求13所述的电池单体，所述电池单体容纳于所述箱体内。
  15. 一种用电装置，包括：如权利要求13所述的电池单体，所述电池单体用于提供电能。
PCT/CN2022/098920 2022-06-15 2022-06-15 端盖组件、电池单体、电池以及用电装置 WO2023240487A1 (zh)

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US20170047565A1 (en) * 2015-08-13 2017-02-16 Samsung Sdi Co., Ltd. Secondary battery
CN209000963U (zh) * 2018-11-19 2019-06-18 东莞百思利新能源科技有限公司 二次电池顶盖
CN209571438U (zh) * 2019-03-19 2019-11-01 东莞百思利新能源科技有限公司 二次电池顶盖
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