WO2025010682A1 - 下塑胶、端盖组件、储能装置及用电设备 - Google Patents

下塑胶、端盖组件、储能装置及用电设备 Download PDF

Info

Publication number
WO2025010682A1
WO2025010682A1 PCT/CN2023/107085 CN2023107085W WO2025010682A1 WO 2025010682 A1 WO2025010682 A1 WO 2025010682A1 CN 2023107085 W CN2023107085 W CN 2023107085W WO 2025010682 A1 WO2025010682 A1 WO 2025010682A1
Authority
WO
WIPO (PCT)
Prior art keywords
lower plastic
groove
ejector
along
sub
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/CN2023/107085
Other languages
English (en)
French (fr)
Inventor
李茂松
檀基本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Hithium Energy Storage Technology Co Ltd
Shenzhen Hithium Energy Storage Technology Co Ltd
Original Assignee
Xiamen Hithium Energy Storage Technology Co Ltd
Shenzhen Hithium Energy Storage Technology Co Ltd
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 Xiamen Hithium Energy Storage Technology Co Ltd, Shenzhen Hithium Energy Storage Technology Co Ltd filed Critical Xiamen Hithium Energy Storage Technology Co Ltd
Priority to PCT/CN2023/107085 priority Critical patent/WO2025010682A1/zh
Priority to EP23944702.2A priority patent/EP4734276A1/en
Publication of WO2025010682A1 publication Critical patent/WO2025010682A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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 energy storage technology, and in particular to a lower plastic, an end cover assembly, an energy storage device and an electrical equipment.
  • a secondary battery also known as a rechargeable battery or storage battery, refers to a battery that can be used continuously by recharging the active material after the battery is discharged.
  • the recyclable nature of secondary batteries has made them gradually become the main power source for electrical equipment.
  • people have higher and higher requirements for their performance in various aspects, especially for the energy density per unit volume of the battery.
  • the thickness of the battery's end cap assembly is an important parameter that affects the energy density per unit volume of the battery. If the end cap assembly is too thick, the energy density per unit volume of the battery will be reduced.
  • the current end cap assembly includes a lower plastic for insulation between the top cover and the pole.
  • the lower plastic In order to increase the energy density per unit volume of the battery, the lower plastic is usually designed to be very thin.
  • the existing lower plastic has a large molding shrinkage rate of the material itself (for example, polyethylene has a molding shrinkage rate between 1.5% and 3.6%).
  • the existing molding process does not design the flow channel for the special structure of the thin sheet-like lower plastic.
  • the lower plastic molding process is prone to warping or breaking due to uneven filling and increased internal stress.
  • the production yield of the lower plastic cannot be further improved, which has become one of the constraints for reducing the production cost of secondary batteries.
  • the present application provides a lower plastic, an end cover assembly, an energy storage device and an electrical equipment, which can ensure the structural strength of the lower plastic and improve the production yield of the lower plastic.
  • the present application provides a lower plastic for an energy storage device, wherein the lower plastic comprises a lower plastic body, wherein the lower plastic body comprises a first surface and a second surface, wherein the first surface and the second surface are arranged in opposite directions along a thickness direction of the lower plastic;
  • the lower plastic body is provided with a convex block, a first convex block and a second convex block, the convex block, the first convex block and the second convex block are all convexly arranged on the second surface, along the length direction of the lower plastic, the first convex block and the second convex block are respectively located at opposite ends of the lower plastic body, and the first convex block and the second convex block are both extended along the width direction of the lower plastic, the convex block is located between the first convex block and the second convex block, and is spaced apart from the first convex block and the second convex block, and the convex block extends along the width direction of the lower plastic;
  • the convex block includes a first side surface, the first protrusion includes a third side surface, the second protrusion includes a fifth side surface, the first side surface, the third side surface, and the fifth side surface are located on the same side in the width direction of the lower plastic, and the first side surface, the third side surface, and the fifth side surface each have an injection molding portion.
  • the lower plastic is provided with a through groove, and the through groove includes a groove side wall protruding from the second surface;
  • the lower plastic is also provided with an explosion-proof fence, which is arranged in the through groove and connected to the end of the groove side wall facing away from the first surface.
  • the explosion-proof fence includes a plurality of first ribs and a plurality of second ribs.
  • the plurality of first ribs extend along the width direction of the lower plastic and are connected to the groove side walls of the through groove, and the plurality of second ribs extend along the length direction of the lower plastic and are connected to the groove side walls of the through groove.
  • the plurality of first ribs are cross-connected with the plurality of second ribs.
  • the first surface has a plurality of first ejector pins, and the plurality of first ejector pins are symmetrical with respect to a central axis, and the central axis is a straight line extending along a length direction of the lower plastic and located in the middle of a width direction of the lower plastic.
  • the plurality of first ejector pin portions are located on opposite sides of the central axis, and the plurality of first ejector pin portions are symmetrical with respect to the central axis.
  • the central axis has the first ejector portion, and the first ejector portion on the central axis is symmetrical with respect to the central axis.
  • the lower plastic is provided with a first groove, the first groove is formed by being recessed from the first surface toward the first protrusion, and the first groove includes a first bottom wall and a first side wall and a second side wall that are oppositely arranged along the length direction of the lower plastic;
  • the lower plastic is provided with a second groove, the second groove is formed by being recessed from the first surface toward the second protrusion, and the second groove includes a second bottom wall and a third side wall and a fourth side wall which are arranged opposite to each other along the length direction of the lower plastic;
  • the first bottom wall and the second bottom wall are provided with a plurality of second ejector pins, and the plurality of second ejector pins are symmetrical in pairs relative to the central axis.
  • the first groove has a plurality of first guide grooves, the plurality of first guide grooves are arranged in sequence along the width direction of the lower plastic, the volumes of the plurality of first guide grooves are equal, the length dimension of each first guide groove along the width direction of the lower plastic is 12.00 mm-16.00 mm, and the width dimension of each first guide groove along the length direction of the lower plastic is 7.00 mm-11.00 mm;
  • the second groove has several second guide grooves, which are arranged in sequence along the width direction of the lower plastic.
  • the volumes of the several second guide grooves are equal.
  • the length dimension of each second guide groove is 12.00mm-14.00mm, and along the length direction of the lower plastic, the width dimension of each second guide groove is 7.00mm-11.00mm.
  • the pushing surface of each of the first ejector pin portions is circular
  • the pushing surface of each of the second ejector pin portions is circular
  • the radius of the pushing surface of each of the first ejector pin portions is greater than the radius of the pushing surface of each of the second ejector pin portions.
  • the radius of the pushing surface of the second ejector portion ranges from 1.5 mm to 3.0 mm.
  • the first groove includes two end walls arranged opposite to each other along the width direction of the lower plastic, the number of the first guide grooves is four, each of the first guide grooves has a second ejector portion, and along the width direction of the lower plastic, the second ejector portions in the two first guide grooves located on the outer sides are respectively close to the two end walls of the first groove, and the second ejector portions in the two first guide grooves located in the middle are respectively located on opposite sides of the central axis and are adjacent to each other, and the second ejector portions in the four first guide grooves are all close to the side walls of the first groove and are arranged at intervals along the length direction of the first groove.
  • a distance between the second ejector pin portion in each of the first guide grooves and any groove wall of the first guide groove is greater than or equal to 0.55 mm.
  • the second groove includes two end walls arranged opposite to each other along the width direction of the lower plastic, the number of the second guide grooves is four, each of the second guide grooves has a second ejector portion, and along the width direction of the lower plastic, the second ejector portions in the two second guide grooves located on the outer sides are respectively close to the two end walls of the second groove, and the second ejector portions in the two second guide grooves located in the middle are respectively located on opposite sides of the central axis and are adjacent to each other, and the second ejector portions in the four second guide grooves are all close to the side walls of the second groove and are arranged at intervals along the length direction of the second groove.
  • a distance between the second ejector pin portion in each of the second guide grooves and any groove wall of the second guide groove is greater than or equal to 0.55 mm.
  • a plurality of third ejector pins are provided at the intersections of a plurality of the first ribs and a plurality of the second ribs, and the plurality of third ejector pins are symmetrical in pairs with respect to the central axis.
  • the pushing surfaces of the plurality of third ejector pins are circular, and the radius of the pushing surface of each of the first ejector pins is greater than the radius of the pushing surface of each of the third ejector pins.
  • the through groove includes a first sub-groove and two second sub-grooves, and along the width direction of the lower plastic, the two second sub-grooves are respectively located on opposite sides of the first sub-groove, and the two second sub-grooves are respectively connected to the first sub-groove;
  • the width of the first sub-grooves is greater than the width of each of the second sub-grooves.
  • the present application provides an end cap assembly, comprising an end cap and a lower plastic as described above, wherein the end cap is provided with an explosion-proof valve;
  • the lower plastic is provided with a through groove, and the through groove includes a first sub-groove and two second sub-grooves.
  • the two second sub-grooves are respectively located on opposite sides of the first sub-groove, and the two second sub-grooves are respectively connected to the first sub-groove;
  • the lower plastic is mounted on the surface of the end cover, and the first surface of the lower plastic faces the end cover.
  • the orthographic projection of the explosion-proof valve falls into the orthographic projection of the first sub-groove.
  • the present application provides an energy storage device, comprising a shell, an electrode assembly and an end cap assembly as described above, wherein the shell has an opening, the shell is provided with a receiving cavity, the electrode assembly is received in the receiving cavity, and the end cap assembly covers the opening.
  • the present application provides an electrical device, comprising the energy storage device as described above, wherein the energy storage device is used to store electrical energy.
  • the present application makes the injection molding part be located on the surface of the same side of the lower plastic along the width direction of the lower plastic, where the protrusion, the first protrusion and the second protrusion are located.
  • the molten plastic liquid can be injected from the positions of the three injection molding parts at the same time, thereby accelerating the speed at which the molten plastic liquid fills the mold cavity, shortening the injection molding time of the lower plastic, and improving the production efficiency of the lower plastic.
  • the protrusion is located in the middle position of the lower plastic, the first protrusion and the second protrusion are respectively located at the opposite ends of the lower plastic, and the protrusion, the first protrusion and the second protrusion are three three-dimensional structures convexly arranged on the lower plastic body, and the flow channel of each three-dimensional structure is connected to the flow channel of the lower plastic body to form a roughly "Z"-shaped flow channel, and the "Z"-shaped flow channel has two right-angle corners, and the structure is simple.
  • the extension direction of the bump, the first protrusion, and the second protrusion are all consistent with the flow direction of the initially injected high-speed molten plastic liquid.
  • the molten plastic liquid is injected at high speed from the positions of the three injection molding parts, so that the molten plastic liquid can quickly fill the right-angle corner of the flow channel, avoiding the formation of vortices at the right-angle corner, thereby avoiding reducing the structural strength of the lower plastic corresponding to the right-angle corner.
  • the flow rate is slow, and the large-surface mold cavity of the lower plastic body can be filled more evenly, thereby improving the production yield of the lower plastic.
  • FIG1 is a diagram of an application scenario of an energy storage device provided in an embodiment of the present application.
  • FIG2 is a schematic diagram of the structure of the energy storage device shown in FIG1 ;
  • FIG3 is an exploded schematic diagram of the end cover assembly of the energy storage device shown in FIG2 ;
  • FIG4 is a schematic diagram of the structure of the end cover shown in FIG3;
  • FIG5 is a schematic structural diagram of the end cover shown in FIG4 from another angle
  • FIG6 is a schematic diagram of the structure of the lower plastic shown in FIG3 ;
  • FIG7 is a schematic diagram of the structure of the lower plastic shown in FIG6 at a second angle
  • FIG8a is a schematic diagram of the structure of the lower plastic shown in FIG6 at a third angle, showing all ejector pins;
  • FIG8 b is a schematic diagram of the structure of the lower plastic shown in FIG6 at a third angle, wherein the first ejector pin portion is ignored;
  • FIG9 is a partial cross-sectional structural diagram of the lower plastic shown in FIG6 ;
  • FIG. 10 is a schematic diagram of the assembly structure of the end cover and the lower plastic shown in FIG. 4 .
  • the main way to generate green electricity is to develop green energy such as photovoltaics and wind power to replace fossil energy.
  • the generation of green electricity generally relies on photovoltaics, wind power, water potential, etc., while wind and solar energy generally have strong intermittent and volatile problems, which will cause instability in the power grid, insufficient electricity during peak hours, too much electricity during low hours, and unstable voltage will also cause damage to electricity.
  • this solution provides an energy storage device, which has a group of chemical batteries in it.
  • the chemical elements in the chemical batteries are mainly used as energy storage media.
  • the charging and discharging process is accompanied by chemical reactions or changes in the energy storage media.
  • the electricity generated by wind and solar energy is stored in chemical batteries.
  • the use of external electricity reaches its peak, the stored electricity is released for use, or transferred to places where electricity is scarce for use.
  • energy storage i.e. energy storage
  • (wind and solar) power generation side energy storage grid side energy storage
  • base station side energy storage base station side energy storage
  • user side energy storage The corresponding types of energy storage devices include:
  • FIG. 1 is an application scenario diagram of the energy storage device provided in the embodiment of the present application.
  • the energy storage device provided in the embodiment of the present application is applied to an energy storage system 5000, and the energy storage system 5000 includes a first power conversion device 4100 (photovoltaic panel), a second power conversion device 4200 (wind turbine), a first power user 3000 (grid), a second power user 2000 (base station) and an energy storage device 1000.
  • the energy storage system 5000 also includes an energy storage cabinet, and the energy storage device 1000 is installed in the energy storage cabinet, which can be installed outdoors.
  • the first power conversion device 4100 can convert solar energy into electrical energy during the period of low electricity prices, and the energy storage device 1000 is used to store the electrical energy and supply the first power user 3000 or the second power user 2000 during peak electricity consumption, or to supply power when the first power user 3000 or the second power user 2000 is powered off/power outage.
  • the second power conversion device 4200 can convert wind energy into electric energy, and the energy storage device 1000 is used to store the electric energy and supply it to the first power device 3000 or the second power device 2000 during peak power consumption, or to supply power when the first power device 3000 or the second power device 2000 is powered off/out of power.
  • the transmission of electric energy can be carried out using a high-voltage cable.
  • first electric device 3000, the second electric device 2000 and other devices including energy storage devices can be understood as electric devices.
  • the energy storage device 1000 may include but is not limited to a single cell, a battery module, a battery pack, a battery system, etc.
  • the actual application form of the energy storage device 1000 provided in the embodiment of the present application may be but is not limited to the listed products, and may also be other application forms.
  • the embodiment of the present application does not strictly limit the application form of the energy storage device 1000.
  • the embodiment of the present application only takes the energy storage device 1000 as a multi-core battery as an example for explanation.
  • FIG. 2 is a schematic diagram of the structure of the energy storage device shown in FIG. 1.
  • the energy storage device 1000 includes a shell (not shown), an end cap assembly 100, and an electrode assembly 200.
  • the shell has an opening, and the shell is provided with a receiving cavity, and the electrode assembly 200 is received in the receiving cavity.
  • the end cap assembly 100 covers the opening, and the shell wraps around and around the bottom of the electrode assembly 200, and the shell is sealed and connected to the end cap assembly 100.
  • the outer side of the electrode assembly 200 is also coated with an insulating film (not shown) to protect the electrode core and prevent the electrode core from being scratched.
  • the insulating film is coated on the outer surface of the electrode assembly 200, and the side of the insulating film is hot-melt bonded to the end cap assembly 100.
  • the length direction of the end cap assembly 100 shown in FIG2 is defined as the X-axis direction
  • the width direction of the end cap assembly 100 is defined as the Y-axis direction
  • the thickness direction of the end cap assembly 100 is defined as the Z-axis direction.
  • the X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.
  • the directional terms such as “upper” and “lower” mentioned in the description of the embodiment of the present application are described based on the directional terms shown in FIG2 of the specification, with the positive direction of the Z-axis being "upper” and the negative direction of the Z-axis being “lower”, which does not constitute a limitation on the energy storage device 1000 in the actual application scenario.
  • the "same”, “equal” or “parallel” used in the following text are all allowed to have a certain tolerance.
  • the end cap assembly 100 includes a lower plastic 10 and an end cap 40, and the lower plastic 10 is installed on the end cap 40.
  • the end cap 40 in this embodiment is a bare aluminum part, and the lower plastic 10 is made of plastic material and is insulated.
  • the end cap assembly 100 also includes an upper plastic assembly 50, a pressing sheet assembly 60 and an electrode column 70. Specifically, the end cap 40 and the lower plastic 10 are stacked, and the lower plastic 10 is used to insulate the end cap 40 and the electrode assembly 200.
  • the upper plastic assembly 50 and the end cap 40 are stacked, and the upper plastic assembly 50 is located on the side of the end cap 40 away from the lower plastic 10.
  • the electrode column 70 includes a positive electrode column 71 and a negative electrode column 72.
  • the upper plastic assembly 50 includes a first upper plastic 51 and a second upper plastic 52, which are arranged side by side at both ends of the end cap 40 along the length direction (X-axis direction) of the end cap assembly 100.
  • the first upper plastic 51 and the second upper plastic 52 are both provided with through holes, which are respectively used for the positive pole 71 and the negative pole 72 to pass through.
  • the positive pole 71 and the negative pole 72 are covered with a sealing ring 80.
  • the pressing plate assembly 60 includes a first pressing plate 61 and a second pressing plate 62, which are stacked on the side of the upper plastic assembly 50 away from the end cap 40, and are fixedly connected to the first upper plastic 51 and the second upper plastic 52, respectively.
  • Figure 4 is a schematic diagram of the structure of the end cover shown in Figure 3
  • Figure 5 is a schematic diagram of the structure of the end cover shown in Figure 4 from another angle.
  • the end cover 40 includes an end cover body 41 and an explosion-proof valve 42.
  • the end cover body 41 is provided with a first through hole 44, a second through hole 45 and a liquid injection hole 46.
  • the first through hole 44, the liquid injection hole 46, the explosion-proof valve 42 and the second through hole 45 are arranged in sequence.
  • the end cover body 41 is a long thin plate, which includes a front side 411 and a back side 412 arranged opposite to the front side 411.
  • a welding groove 418 is also provided in the middle of the end cover body 41, which passes through the back side 412 and the front side 411, and the welding groove 418 is located between the first through hole 44 and the second through hole 45.
  • the explosion-proof valve 42 is accommodated in the welding groove 418 and welded to the groove wall of the welding groove 418. When the internal pressure of the energy storage device 1000 is too high, the explosion-proof valve 42 will automatically open to release the pressure to prevent an explosion.
  • first through hole 44 and the second through hole 45 are respectively provided at opposite ends of the end cover body 41, and penetrate the front surface 411 and the back surface 412.
  • first through hole 44 and the second through hole 45 are respectively used for the positive pole 71 and the negative pole 72 of the energy storage device 1000 to pass through.
  • first through hole 44 can also be used for the negative pole 72 to pass through
  • second through hole 45 can also be used for the positive pole 71 to pass through.
  • the injection hole 46 is disposed between the first through hole 44 and the explosion-proof valve 42 . During the injection process of the energy storage device 1000 , electrolyte is injected into the energy storage device 1000 through the injection hole 46 on the end cover 40 .
  • Figure 6 is a schematic diagram of the structure of the lower plastic shown in Figure 3
  • Figure 7 is a schematic diagram of the structure of the lower plastic shown in Figure 6 at a second angle.
  • the lower plastic 10 includes a lower plastic body 11.
  • the lower plastic body 11 is generally a rectangular thin plate, which includes a first surface 111, a second surface 112, a third surface 118 and a fourth surface 119.
  • the first surface 111 and the second surface 112 are arranged in reverse; along the width direction (Y-axis direction) of the lower plastic 10, the third surface 118 and the fourth surface 119 are arranged in reverse, and the third surface 118 and the fourth surface 119 are connected between the first surface 111 and the second surface 112.
  • the lower plastic body 11 is further provided with a first pole through hole 113, a liquid injection through hole 114 and a second pole through hole 115.
  • first pole through hole 113, the liquid injection through hole 114 and the second pole through hole 115 are sequentially provided on the lower plastic body 11.
  • the first pole through hole 113 is a square through hole.
  • the first pole through hole 113 passes through the first surface 111 and the second surface 112.
  • the first pole through hole 113 is used for the positive pole 71 to pass through.
  • the first pole through hole 113 can also be used for the negative pole 72 to pass through.
  • the second pole through hole 115 is a square through hole. Along the length direction of the lower plastic 10 (X-axis direction), the second pole through hole 115 is located at one end of the lower plastic body 11 away from the first pole through hole 113. The second pole through hole 115 passes through the first surface 111 and the second surface 112. The second pole through hole 115 is used for the negative pole 72 to pass through. In other embodiments, the second pole through hole 115 can also be used for the positive pole 71 to pass through.
  • the injection hole 114 penetrates the first surface 111 and the second surface 112 of the lower plastic body 11.
  • the injection hole 114 is located on the side of the first pole hole 113, and is used to cooperate with the injection hole 46 to allow electrolyte to pass through and flow into the electrode assembly 200.
  • the lower plastic body 11 is further provided with a through groove 12.
  • the through groove 12 is located in the middle of the lower plastic body 11.
  • the through groove 12 passes through the first surface 111 and the second surface 112.
  • the through groove 12 includes a first sub-groove 121 and two second sub-grooves 122.
  • the first sub-groove 121 includes a first wall 1211 and a second wall 1212 that are arranged opposite to each other.
  • the first wall 1211 includes a first sub-wall 1211a and two second sub-walls 1211b.
  • the first sub-wall 1211a extends along the width direction (Y-axis direction) of the lower plastic 10.
  • the two second sub-walls 1211b are respectively located on opposite sides of the first sub-wall 1211a and connected to the first sub-wall 1211a.
  • the two second sub-walls 1211b are arc-shaped and bend back to the first wall 1211 and the second wall 1212.
  • the second wall 1212 includes a third sub-wall 1212a and two fourth sub-walls 1212b.
  • the third sub-wall 1212a extends along the width direction (Y-axis direction) of the lower plastic 10.
  • the two fourth sub-walls 1212b are respectively located on opposite sides of the third sub-wall 1212a and connected to the third sub-wall 1212a.
  • the two fourth sub-walls 1212b are arc-shaped and bend away from the first wall 1211 and the second wall 1212.
  • the first sub-wall 1211a and the third sub-wall 1212a are arranged oppositely and in parallel (a certain process tolerance is allowed), and the two second sub-walls 1211b and the two fourth sub-walls 1212b are arranged oppositely.
  • the overall outline of the first sub-groove 121 is an "elliptical track" shape.
  • the two second sub-grooves 122 are both rectangular through-grooves.
  • the two second sub-grooves 122 each include a third wall 1221 and a fourth wall 1222 that are arranged opposite to each other.
  • the third wall 1221 and the fourth wall 1222 are arranged in parallel (a certain process tolerance is allowed), and both extend along the width direction (Y-axis direction) of the lower plastic 10.
  • the two second sub-grooves 122 also include a fifth wall 1223, which extends along the length direction (X-axis direction) of the lower plastic 10 and is connected between the third wall 1221 and the fourth wall 1222.
  • the first sub-groove 121 is located in the middle position, and the two second sub-grooves 122 are respectively located on opposite sides of the first sub-groove 121 and are both connected to the first sub-groove 121.
  • the two second sub-walls 1211b are respectively connected to the first sub-wall 1211a and the third walls 1221 of the two second sub-grooves 122, and the first sub-wall 1211a, the two second sub-walls 1211b and the two third walls 1221 together constitute the first groove side wall of the through groove 12.
  • the two fourth sub-walls 1212b are respectively connected to the third sub-wall 1212a and the fourth walls 1222 of the two second sub-grooves 122, and the third sub-wall 1212a, the two fourth sub-walls 1212b and the two fourth walls 1222 together constitute the second groove side wall of the through groove 12.
  • the fifth walls 1223 of the two second sub-grooves 122 are arranged opposite to each other, and the two fifth walls 1223 are respectively equivalent to the third groove side wall and the fourth groove side wall of the through groove 12.
  • the distance between the first sub-wall 1211a and the third sub-wall 1212a is greater than the distance between the third wall 1221 and the fourth wall 1222, which is equivalent to that the width dimension of the first sub-groove 121 is greater than the width dimension of the second sub-groove 122.
  • the cross-sectional area of the first sub-groove 121 is greater than the cross-sectional area of the two second sub-grooves 122.
  • the through groove 12 is used to pass the pressurized gas generated in the electrode assembly 200 to the explosion-proof valve 42.
  • the cross-sectional area of the first sub-groove 121 is larger than the cross-sectional area of the two second sub-grooves 122, which helps the gas generated in the electrode assembly 200 to flow to the explosion-proof valve 42, so as to facilitate the opening of the explosion-proof valve 42.
  • the thickness of the position where the through groove 12 is provided in the lower plastic 10 is greater than the thickness of other positions.
  • the through groove 12 is recessed from the first surface 111 of the lower plastic body 11 to the second surface 112 and a protrusion 13 is formed on the second surface 112.
  • the through groove 12 penetrates the first surface 111 and the protrusion 13 at the same time, and the groove side wall of the through groove 12 includes the first surface 111 and the second surface 112.
  • the protrusion 13 includes a first side surface 131 and a second side surface 132 disposed opposite to each other.
  • the lower plastic 10 further includes an explosion-proof fence 14, which is a grid-shaped thin plate.
  • the explosion-proof fence 14 is installed in the through groove 12 and is connected to the end of the groove side wall protruding from the second surface 112 of the through groove 12. In the thickness direction (Z-axis direction) of the lower plastic 10, the explosion-proof fence 14 covers the through groove 12.
  • the explosion-proof fence 14 includes a plurality of first ribs 141 and a plurality of second ribs 142.
  • the plurality of first ribs 141 are arranged side by side and spaced apart along the length direction (X-axis direction) of the lower plastic 10, and each first rib 141 extends along the width direction (Y-axis direction) of the lower plastic 10.
  • the plurality of first ribs 141 include a first sub-rib 1411, and the first sub-rib 1411 connects two fifth walls 1223, which is equivalent to connecting the third groove side wall and the fourth groove side wall of the through groove 12; the plurality of first ribs 141 include a second sub-rib 1412, and the second sub-rib 1412 connects two second sub-walls 1211b; the plurality of first ribs 141 include a third sub-rib 1413, and the third sub-rib 1413 connects two fourth sub-walls 1212b.
  • the number of the first ribs 141 is 3.
  • second ribs 142 are arranged side by side and at intervals along the width direction (Y-axis direction) of the lower plastic 10, and each second rib 142 connects the first groove side wall and the second groove side wall of the through groove 12.
  • two second ribs 142 among several second ribs 142 connect the third wall 1221 and the fourth wall 1222 of a second sub-groove 122;
  • two second ribs 142 among several second ribs 142 connect the third wall 1221 and the fourth wall 1222 of another second sub-groove 122;
  • five second ribs 142 among several second ribs 142 connect the first wall 1211 and the second wall 1212 of the first sub-groove 121.
  • the number of second ribs 142 is 9.
  • the first sub-rib 1411, the second sub-rib 1412, the third sub-rib 1413 and several second ribs 142 form a grid-like explosion-proof fence 14.
  • the tabs or blue films are prone to breakage and produce fragments.
  • the explosion-proof fence 14 By arranging the explosion-proof fence 14 in the through groove 12, it is possible to prevent the tabs or blue film fragments from floating to the bottom of the explosion-proof valve 42, blocking the gas passage, and thus causing explosion-proof failure, and it is also possible to prevent the tabs from directly contacting the explosion-proof valve 42.
  • the cross arrangement of the plurality of first ribs 141 and the plurality of second ribs 142 can enhance the structural strength of the explosion-proof fence 14.
  • the lower plastic 10 further includes a first protrusion 15 and a second protrusion 16.
  • the first protrusion 15 and the second protrusion 16 are convexly arranged on the second surface 112 of the lower plastic body 11, and are located at opposite ends of the lower plastic 10 along the length direction (X-axis direction).
  • the first protrusion 15 is arranged adjacent to the first pole through hole 113, and the first protrusion 15 is located on the side of the first pole through hole 113 that is away from the through groove 12.
  • the second protrusion 16 is arranged adjacent to the second pole through hole 115, and the second protrusion 16 is located on the side of the second pole through hole 115 that is away from the through groove 12.
  • the first protrusion 15 is in a rectangular block shape and extends along the width direction (Y-axis direction) of the lower plastic 10.
  • one side of the first protrusion 15 is flush with the end edge of the lower plastic body 11, and along the width direction (Y-axis direction) of the lower plastic 10, the two ends of the first protrusion 15 are flush with the two side edges of the lower plastic body 11.
  • the length dimension of the first protrusion 15 is the same as the width dimension of the lower plastic body 11.
  • the first protrusion 15 includes a third side surface 151 and a fourth side surface 152 that are arranged opposite to each other.
  • a first groove 17 is provided in the area corresponding to the first surface 111 of the lower plastic body 11 and the first protrusion 15.
  • the first groove 17 is recessed from the first surface 111 along the thickness direction (Z-axis direction) of the lower plastic 10 into the first protrusion 15.
  • the first groove 17 includes a first bottom wall 171 and a first side wall 172 and a second side wall 173 that are relatively arranged along the length direction (X-axis direction) of the lower plastic 10.
  • the first groove 17 also includes two end walls that are relatively arranged along the width direction (Y-axis direction) of the lower plastic 10.
  • the first groove 17 is provided in the corresponding area of the first protrusion 15 to ensure the depth of the first groove 17, which can save the material of the lower plastic 10 and is conducive to saving manufacturing costs, and can also reduce the weight of the lower plastic 10, which is conducive to the lightweight design of the energy storage device 1000.
  • the orthographic projection of the first groove 17 completely coincides with the orthographic projection of the first protrusion 15, or the orthographic projection of the first groove 17 is within the orthographic projection area of the first protrusion 15; it can be understood that the first The contour of the groove 17 is the same as or similar to the outer contour of the first protrusion 15 .
  • first reinforcing ribs 174 are provided in the first groove 17, and the several first reinforcing ribs 174 are convexly arranged on the first bottom wall 171 and connected between the first side wall 172 and the second side wall 173; along the width direction of the lower plastic 10 (Y-axis direction), the several first reinforcing ribs 174 are arranged at intervals, and the first groove 17 is divided into several first guide grooves 175. Along the width direction of the lower plastic 10, the several first guide grooves 175 are arranged in sequence. Several first reinforcing ribs 174 can enhance the strength of the first groove 17.
  • the number of the first reinforcing ribs 174 is 3, and the three first reinforcing ribs 174 divide the first groove 17 into four first guide grooves 175 of equal volume.
  • the groove wall of the first guide groove 175 is actually formed by the side wall of the first groove 17, the end wall of the first groove 17 and the several first reinforcing ribs 174.
  • the distance between the first side wall 172 and the second side wall 173 is 7.00mm-11.00mm, specifically, the distance between the first side wall 172 and the second side wall 173 is 9.22mm
  • the width dimension of the first guide groove 175 is 7.00mm-11.00mm, specifically, the width dimension of the first guide groove 175 is 9.22mm
  • the distance between two adjacent first reinforcing ribs 174 is 12.00mm-16.00mm, specifically, the distance between two adjacent first reinforcing ribs 174 is 14.72mm
  • the length dimension of the first guide groove 175 is 12.00mm-16.00mm, specifically, the length dimension of the first guide groove 175 is 14.72mm.
  • the lower plastic 10 is also provided with a plurality of first guide holes 178, which are provided on the first bottom wall 171 of the first groove 17, and the first guide holes 178 penetrate the first protrusion 15 and the first surface 111 along the thickness direction (Z-axis direction) of the lower plastic 10, that is, in the thickness direction (Z-axis direction) of the lower plastic 10, each first guide hole 178 penetrates the bottom wall of the first groove 17.
  • the plurality of first guide holes 178 are arranged at intervals along the length direction of the first groove 17. Specifically, in the present embodiment, the first guide holes 178 are arranged in the first guide groove 175; the number of the first guide holes 178 is 4, and each first guide groove 175 is provided with a first guide hole 178.
  • the first guide hole 178 can guide the electrolyte splashed from the injection through hole 114 to the space between the end cover 40 and the first surface 111 of the lower plastic 10, through the first groove 17, through several first guide holes 178, and then through the first guide holes 178 back to the electrode assembly 200, so as to realize the reflux and reuse of the electrolyte, so as to prevent the electrolyte from being retained between the end cover 40 and the first surface 111 of the lower plastic 10, avoid the accumulation of liquid on the first surface 111 of the lower plastic 10 and the first groove 17, and improve the wettability of the electrode assembly 200.
  • the second protrusion 16 is in a rectangular block shape and extends along the width direction (Y-axis direction) of the lower plastic 10.
  • one side of the second protrusion 16 is flush with the end edge of the lower plastic body 11, and along the width direction (Y-axis direction) of the lower plastic 10, the two ends of the second protrusion 16 are flush with the two side edges of the lower plastic body 11.
  • the length dimension of the second protrusion 16 is the same as the width dimension of the lower plastic body 11.
  • the second protrusion 16 includes a fifth side surface 161 and a sixth side surface 162 that are disposed opposite to each other.
  • a second groove 18 is provided in the area corresponding to the first surface 111 of the lower plastic body 11 and the second protrusion 16, and the second groove 18 is recessed from the first surface 111 along the thickness direction (Z-axis direction) of the lower plastic 10 into the second protrusion 16.
  • the second groove 18 includes a second bottom wall 181 and a third side wall 182 and a fourth side wall 183 that are relatively arranged along the length direction (X-axis direction) of the lower plastic 10.
  • the second groove 18 also includes two end walls that are relatively arranged along the width direction (Y-axis direction) of the lower plastic 10.
  • the second groove 18 is provided in the corresponding area of the second protrusion 16 to ensure the depth of the second groove 18, which can save the material of the lower plastic 10 and is conducive to saving manufacturing costs, and can also reduce the weight of the lower plastic 10, which is conducive to the lightweight design of the energy storage device 1000.
  • the orthographic projection of the second groove 18 completely coincides with the orthographic projection of the second protrusion 16 , or the orthographic projection of the second groove 18 is within the orthographic projection area of the second protrusion 16 ; it can be understood that the contour of the second groove 18 is the same as or similar to the outer contour of the second protrusion 16 .
  • the second groove 18 is provided with a plurality of second reinforcing ribs 184, which are protruding from the second bottom wall 181 and connected between the third side wall 182 and the fourth side wall 183; along the width direction (Y-axis direction) of the lower plastic 10, the plurality of second reinforcing ribs 184 are provided.
  • the second reinforcing ribs 184 are arranged at intervals and divide the second groove 18 into several second guide grooves 185. Along the width direction of the lower plastic 10, several second guide grooves 185 are arranged in sequence. Several second reinforcing ribs 184 can enhance the strength of the second groove 18.
  • the number of second reinforcing ribs 184 is 3, and the three second reinforcing ribs 184 divide the second groove 18 into four second guide grooves 185 of equal volume.
  • the groove wall of the second guide groove 185 is actually formed by the side wall of the second groove 18, the end wall of the second groove 18 and several second reinforcing ribs 184.
  • the distance between the third side wall 182 and the fourth side wall 183 is 7.00mm-11.00mm, specifically, the distance between the third side wall 182 and the fourth side wall 183 is 9.22mm
  • the width dimension of the second guide groove 185 is 7.00mm-11.00mm, specifically, the width dimension of the second guide groove 185 is 9.22mm
  • the distance between two adjacent second reinforcing ribs 184 is 12.00mm-16.00mm, specifically, the distance between two adjacent second reinforcing ribs 184 is 14.72mm
  • the length dimension of the second guide groove 185 is 12.00mm-16.00mm, specifically, the length dimension of the second guide groove 185 is 14.72mm.
  • the lower plastic 10 is also provided with a plurality of second guide holes 188, which are provided on the second bottom wall 181 of the second groove 18, and the second guide holes 188 penetrate the second protrusion 16 and the first surface 111 along the thickness direction (Z-axis direction) of the lower plastic 10, that is, in the thickness direction of the lower plastic 10, each second guide hole 188 penetrates the bottom wall of the second groove 18.
  • the plurality of second guide holes 188 are arranged at intervals along the length direction of the second groove 18. Specifically, in this embodiment, the second guide holes 188 are arranged in the second guide groove 185; the number of the second guide holes 188 is 4, and each second guide groove 185 is provided with a second guide hole 188.
  • the second guide holes 188 can guide the electrolyte splashed from the injection through hole 114 to the space between the end cover 40 and the first surface 111 of the lower plastic 10, through the second groove 18, through several second guide holes 188, and then through the second guide holes 188 back to the electrode assembly 200, so as to realize the reflux and reuse of the electrolyte, prevent the electrolyte from being retained between the end cover 40 and the first surface 111 of the lower plastic 10, avoid the accumulation of liquid on the first surface 111 of the lower plastic 10 and the second groove 18, and improve the wettability of the electrode assembly 200.
  • the lower plastic 10 is made by an injection molding process. During the injection molding, a molten plastic liquid melted at a high temperature is injected into the mold cavity of the mold through the injection port of the mold (not shown). After the molten plastic liquid fills the mold cavity, the temperature of the high-temperature molten plastic liquid is lowered so that the molten plastic liquid solidifies and forms, and then demolding is performed to obtain the lower plastic 10.
  • the surface of the lower plastic 10 forms an injection molding part. On the one hand, from the perspective of the mold, the injection molding part corresponds to the position of the injection molding port of the mold. On the other hand, from the perspective of the lower plastic 10, the injection molding part is a certain position on the outer surface of the lower plastic 10.
  • the injection molding part can be a protrusion, a groove or a plane.
  • the lower plastic 10 has a plurality of injection molding parts 19.
  • the plurality of injection molding parts 19 are distributed on the convex block 13, the first protrusion 15 and the second protrusion 16, and are respectively located on one side of the convex block 13, the first protrusion 15 and the second protrusion 16 along the width direction (Y-axis direction) of the lower plastic 10.
  • the first protrusion 15 and the second protrusion 16 are respectively located at opposite ends of the lower plastic body 11, and the convex block 13 is located between the first protrusion 15 and the second protrusion 16, and is spaced apart from the first protrusion 15 and the second protrusion 16.
  • the convex block 13 includes a first side surface 131, the first protrusion 15 includes a third side surface 151, and the second protrusion 16 includes a fifth side surface 161.
  • the first side surface 131, the third side surface 151, and the fifth side surface 161 are located on the same side of the width direction (Y-axis direction) of the lower plastic 10.
  • the first side surface 131, the third side surface 151, and the fifth side surface 161 are coplanar with the third surface 118.
  • An injection molding portion 19 is provided on the first side surface 131, the third side surface 151, and the fifth side surface 161 of the lower plastic 10.
  • the number of the injection molding parts 19 is three, and they are respectively located on the first side surface 131 of the convex block 13, the third side surface 151 of the first protrusion 15, and the fifth side surface 161 of the second protrusion 16.
  • the injection molding part 19 can be located on the second side surface 132 of the protrusion 13 , the fourth side surface 152 of the first protrusion 15 , and the sixth side surface 162 of the second protrusion 16 , respectively, as long as the injection molding part 19 is located on the same side of the width direction (Y-axis direction) of the lower plastic 10 .
  • molten plastic can be injected from the three injection molding parts 19 at the same time, so as to speed up the speed of the molten plastic filling the mold cavity, shorten the injection molding time of the lower plastic 10, and improve the production efficiency of the lower plastic 10.
  • the protrusion 13 is located in the middle of the lower plastic 10
  • the first protrusion 15 and the second protrusion 16 are respectively located at opposite ends of the lower plastic 10. Injecting molten plastic from the three injection molding parts 19 can make the molten plastic evenly fill the mold cavity, thereby improving the production yield of the lower plastic 10.
  • the first protrusion 15, the convex block 13 and the second protrusion 16 are all three-dimensional structures convexly arranged on the second surface 112 of the lower plastic body 11.
  • the molten plastic liquid is injected from the three injection molding parts 19.
  • the molten plastic liquid flows along the thickness direction of the lower plastic 10 in the flow channels of the three three-dimensional structures, and then flows into the large surface mold cavity of the lower plastic body 11; on the other side of the lower plastic 10 opposite to the three injection molding parts 19 in the width direction (Y-axis direction), the molten plastic liquid enters the flow channels of the three three-dimensional structures from the large surface mold cavity of the lower plastic body 11; therefore, the flow channel of each three-dimensional structure is connected with the flow channel of the lower plastic body 11 to form a roughly "Z"-shaped flow channel, and the "Z"-shaped flow channel has two right-angle corners, and the structure is simple.
  • the extension direction of the first protrusion 15, the convex block 13 and the second protrusion 16 are all consistent with the flow direction of the highly molten plastic liquid initially injected.
  • the molten plastic liquid is injected at high speed from the positions of the three injection molding parts 19, so that the molten plastic liquid can quickly fill the right-angle corner, avoid the formation of vortex at the right-angle corner, and thus avoid reducing the structural strength of the corresponding right-angle corner position on the lower plastic body 11.
  • the flow rate is slow, and the large surface mold cavity of the lower plastic body 11 can be filled more evenly, thereby improving the production yield of the lower plastic 10.
  • the molten plastic When the molten plastic is injected into the mold, since the injection portion 19 is located on the same side of the width direction (Y-axis direction) of the lower plastic 10, the molten plastic will flow along the width direction (Y-axis direction) of the lower plastic 10, that is, along the extension direction of the first rib 141.
  • the first rib 141 is relatively long, and the extension direction of the first rib 141 is consistent with the flow direction of the initially injected molten plastic, so the process of the molten plastic filling the flow channel of the first rib 141 is smoother and more uniform.
  • the portion of the second rib 142 between two adjacent first ribs 141 is formed by the molten plastic liquid in the flow channels of the two adjacent first ribs 141 being split and laterally turned into the flow channels of the second rib 142 and then merged. Since the portion of the second rib 142 between the two adjacent first ribs 141 is shorter, the molten plastic liquid in the flow channels of the two adjacent first ribs 141 can be quickly merged in the flow channel of the second rib 142 after being split, thereby avoiding the molten plastic liquid flow rate to decrease, forming a weld mark at the confluence, reducing the structural strength of the second rib 142, and further reducing the structural strength of the explosion-proof fence 14.
  • the first sub-rib 1411 connects the third groove side wall and the fourth groove side wall of the through groove 12, and the molten plastic liquid is injected through the position of the injection molding part 19 on the protrusion 13.
  • the molten plastic liquid can directly flow from the flow channel corresponding to the first sub-rib 1411 in the mold along the width direction (Y-axis direction) of the lower plastic 10.
  • the length of the first sub-rib 1411 is close to the width of the lower plastic 10.
  • Figure 8a is a schematic diagram of the third angle structure of the lower plastic shown in Figure 6, in which all ejector parts are shown.
  • Figure 8b is a schematic diagram of the third angle structure of the lower plastic shown in Figure 6, in which the first ejector part is ignored.
  • the lower plastic 10 is provided with a plurality of first ejector parts S1, a plurality of second ejector parts S2 and a plurality of third ejector parts S3.
  • the plurality of first ejector parts S1 are symmetrical relative to the central axis A
  • the plurality of second ejector parts S2 are symmetrical relative to the central axis A
  • the plurality of third ejector parts S3 are symmetrical relative to the central axis A.
  • the plurality of ejector parts are the positions where the ejector (not shown) abuts after the lower plastic 10 is formed in the mold, so as to push the formed lower plastic out of the mold for demolding.
  • the central axis A is a straight line extending along the length direction (X-axis direction) of the lower plastic 10 and located in the middle of the width direction (Y-axis direction) of the lower plastic 10.
  • the central axis A is a virtual line set for the convenience of expression, and is not a line actually existing on the lower plastic 10.
  • the ejector pin portion is the final product structure of the lower plastic 10, which is formed by the ejector pin to the lower plastic.
  • the first surface 111 of the plastic body 11 is formed by applying an ejection force.
  • the lower plastic 10 may not be formed with an ejector pin.
  • a structure with an ejector pin may be provided before demolding, that is, when the ejector pin has not yet contacted the lower plastic 10, a structure with an ejector pin is formed on the lower plastic 10.
  • first ejector parts S1 are located on the first surface 111 of the lower plastic body 11. Multiple first ejector parts S1 are divided into multiple groups, which can be called first ejector part groups. Each first ejector part group has one or two first ejector parts S1. When the first ejector part group has only one first ejector part S1, the only first ejector part S1 is located on the central axis A; when the first ejector part group has two first ejector parts S1, the two first ejector parts S1 are directly opposite to each other in the width direction of the lower plastic 10 (Y-axis direction) and are symmetrical relative to the central axis A.
  • first ejector part groups are arranged at intervals in the length direction of the lower plastic 10 (X-axis direction). It is equivalent to having a first ejector part S1 on the central axis A, and the first ejector part S1 on the central axis A is symmetrical relative to the central axis A; along the width direction of the lower plastic 10, there are also first ejector parts S1 on both sides of the central axis A, and the first ejector parts S1 on both sides of the central axis A are symmetrical relative to the central axis A.
  • facing means that the line connecting the center points of the two is parallel to the corresponding direction.
  • the line connecting the centers of the two first ejector parts S1 is parallel to the width direction (Y-axis direction) of the lower plastic 10.
  • the line connecting the centers of the two first ejector parts S1 is parallel to the length direction (X-axis direction) of the lower plastic 10.
  • the plurality of first ejector parts S1 are divided into eight first ejector part groups.
  • the first ejector parts S1 in the first group S1.1 are close to the first pole through hole 113 and are spaced apart from the first pole through hole 113 in the width direction (Y-axis direction) of the lower plastic 10.
  • the first ejector parts S1 in the second group S1.2 are located on the central axis A and on the side of the first pole through hole 113 facing away from the first groove 17.
  • the first ejector parts S1 in the third group S1.3 are close to the central axis A and on the side of the first wall 1211.
  • the first ejector parts S1 in the fourth group S1.4 are close to the edge of the lower plastic body 11 and on the side of the third wall 1221.
  • the first ejector parts S1 in the fifth group S1.5 are close to the edge of the lower plastic body 11 and on the side of the fourth wall 1222.
  • the first ejector parts S1 in the sixth group S1.6 are close to the central axis A and on the side of the second wall 1212.
  • the first ejector pin S1 in the seventh group S1.7 is located on the central axis A and on the side of the second pole through hole 115 facing away from the second groove 18.
  • the first ejector pin S1 in the eighth group S1.8 is close to the second pole through hole 115 and is spaced apart from the second pole through hole 115 in the width direction (Y-axis direction) of the lower plastic 10.
  • the first ejector portions S1 in the above-mentioned eight first ejector portion groups are arranged at intervals along the length direction (X-axis direction) of the lower plastic 10, wherein the first ejector portion S1 in the first group S1.1 and the first ejector portion S1 in the eighth group S1.8 are opposite to each other in the length direction (X-axis direction) of the lower plastic 10; the first ejector portion S1 in the second group S1.2 and the first ejector portion S1 in the seventh group S1.7 are opposite to each other in the length direction (X-axis direction) of the lower plastic 10; the first ejector portion S1 in the third group S1.3 and the first ejector portion S1 in the sixth group S1.6 are opposite to each other in the length direction (X-axis direction) of the lower plastic 10; the first ejector portion S1 in the fourth group S1.4 and the first ejector portion S1 in the fifth group S1.5 are opposite to each other in the length direction (X-axis direction
  • the first ejector pins S1 in each group are symmetrical with respect to the central axis A, and the plurality of first ejector pins S1 are evenly distributed, so that when the ejector pin contacts the positions of the plurality of first ejector pins S1 on the first surface 111, a uniform ejection force can be applied to the first surface 111 of the lower plastic 10, thereby improving the uniformity of demolding the lower plastic 10 and further improving the output yield of the lower plastic 10.
  • the plurality of groups of first ejector pins S1 may not have a positive relationship in the length direction (X-axis direction) of the lower plastic 10.
  • the multiple ejector pins are synchronously contacted with the positions of the multiple first ejector pin portions S1 on the first surface 111 of the lower plastic body 11 and move synchronously, so that the first surface 111 is simultaneously subjected to the ejection force of the ejector pins, and the force is relatively uniform, which can avoid the problem of deformation of the lower plastic 10 caused by uneven ejection force, and is conducive to improving the uniformity of demolding the lower plastic 10, and further improving the injection molding yield of the lower plastic 10.
  • the first ejector pin S1 is shaped like a crater.
  • the first ejector portion S1 includes a push surface S11, which is a surface formed by the middle portion of the first ejector portion S1 being recessed into the first surface 111.
  • the push surface S11 faces the first surface 111.
  • the push surface S11 is circular.
  • the pressure of the ejector acts on the first surface 111, which will push the plastic out of the depression, and the plastic on the outside of the ejector is squeezed by the plastic of the recessed part, and will rise from the outer periphery of the ejector, thus forming the first ejector portion S1 in the shape of a crater. It can be understood that when the ejector contacts the first surface 111 and applies an ejection force, the ejector contacts the push surface S11.
  • the shapes of the second ejector portion S2 and the third ejector portion S3 are similar to those of the first ejector portion S1, and are also crater-shaped.
  • the push surfaces of the second ejector portion S2 and the third ejector portion S3 are also circular, which will not be described in detail in the following text.
  • the crater shape of the first ejector portion S1 is slightly concave relative to the first surface 111, and the depth of the concave is negligible compared to the thickness of the lower plastic body 11 (the dimension of the lower plastic body 11 in the Z-axis direction), and the specific depth of the concave is not limited.
  • the edge of the crater shape is also slightly convex relative to the first surface 111, and the height of the convexity is negligible compared to the thickness of the lower plastic body 11, and the specific height of the convexity is not limited. In this way, the setting of the first ejector portion S1 does not have an adverse effect on the structural strength of the lower plastic body 11, nor does it affect the function of the lower plastic 10.
  • the plurality of second ejector pins S2 are located on the first bottom wall 171 of the first groove 17 and the second bottom wall 181 of the second groove 18 .
  • the plurality of second ejector parts S2 are divided into a plurality of groups, which can be referred to as second ejector part groups.
  • Each second ejector part group has two second ejector parts S2, and the two second ejector parts S2 are opposite to each other in the width direction (Y-axis direction) of the lower plastic 10 and are symmetrical with respect to the central axis A.
  • the push surface of the second ejector part S2 is circular, and the radius of the push surface of the second ejector part S2 is smaller than the radius of the push surface of the first ejector part S1. In this embodiment, the radius range of the second ejector part S2 is 1.5 mm-3.0 mm.
  • Each first guide groove 175 has a second ejector portion S2.
  • the second ejector portions S2 in the two first guide grooves 175 located on the outside are respectively close to the two end walls of the first groove 17, and the second ejector portions S2 in the two first guide grooves 175 located in the middle are respectively located on the opposite sides of the central axis A and are adjacently arranged.
  • the second ejector portions S2 in the four first guide grooves 175 are all close to the side walls of the first groove 17 and are arranged at intervals along the length direction of the first groove 17. Specifically, in this embodiment, the second ejector portion S2 in each first guide groove 175 is close to the first side wall 172.
  • the second ejector portion S2 in each first guide groove 175 is located at the vertex position.
  • Each second guide groove 185 has a second ejector portion S2.
  • the second ejector parts S2 in the two second guide grooves 185 located on the outside are respectively close to the two end walls of the second groove 18, and the second ejector parts S2 in the two second guide grooves 185 located in the middle are respectively located on the opposite sides of the central axis A and are adjacently arranged.
  • the second ejector parts S2 in the four second guide grooves 185 are all close to the side walls of the second groove 18 and are arranged at intervals along the length direction of the second groove 18. Specifically, in this embodiment, the second ejector parts S2 in each second guide groove 185 are close to the third side wall 182.
  • the second ejector parts S2 in each second guide groove 185 are located at the vertex position.
  • the mold for injection molding of the first protrusion 15 and the second protrusion 16 is a metal protrusion, and a driving structure is set in the metal protrusion to drive the ejector to be pushed out. Therefore, the metal protrusion needs to occupy a certain space.
  • the second ejector driving structure can be given space; at the same time, the mold assembly for injection molding of the lower plastic 10 can be designed to be smaller, so that the number of lower plastics 10 injected at one time is greater.
  • the plurality of second ejector pins S2 are divided into four second ejector pin groups.
  • the second ejector pins S2 in the first group S2.1 are located in the first guide groove 175 on the outer side of the lower plastic 10 and at the connection between the end wall of the first groove 17 and the first side wall 172, that is, the second ejector pins S2 in the first group S2.1 are close to The end wall of the first groove 17.
  • the second ejector portion S2 in the first group S2.1 is close to the first side wall 172.
  • the second ejector portion S2 in the second group S2.2 is located in the first guide groove 175 in the middle of the lower plastic 10 and close to the central axis A; along the length direction (Y-axis direction) of the lower plastic 10, the second ejector portion S2 in the second group S2.2 is close to the first side wall 172.
  • the second ejector portion S2 in the third group S2.3 is located in the second guide groove 185 on the outer side of the lower plastic 10 and is located at the connection between the end wall of the second groove 18 and the third side wall 182.
  • the second ejector pin portions S2 in the fourth group S2.4 are located in the second guide groove 185 in the middle of the lower plastic 10 and close to the central axis A; along the length direction (Y-axis direction) of the lower plastic 10 , the second ejector pin portions S2 in the fourth group S2.4 are close to the third side wall 182 .
  • the second ejector parts S2 in the first group S2.1 and the second ejector parts S2 in the third group S2.3 are directly opposite to each other in the length direction (X-axis direction) of the lower plastic 10; the second ejector parts S2 in the second group S2.2 and the second ejector parts S2 in the fourth group S2.4 are directly opposite to each other in the length direction (X-axis direction) of the lower plastic 10.
  • the second ejector parts S2 in each group are symmetrical with respect to the central axis A, and the plurality of second ejector parts S2 are evenly distributed, so that when the ejector contacts the positions of the plurality of second ejector parts S2 on the first bottom wall 171 and the second bottom wall 181, a uniform ejection force can be applied to the first bottom wall 171 and the second bottom wall 181 of the lower plastic 10, thereby improving the uniformity of demolding the first protrusion 15 and the second protrusion 16 of the lower plastic 10, and further improving the output yield of the lower plastic 10.
  • the plurality of groups of second ejector parts S2 may not have a directly opposite relationship in the length direction (X-axis direction) of the lower plastic 10.
  • the second ejector portion S2 in each first guide groove 175 is located at the vertex position of the first guide groove 175, and the distance between the second ejector portion S2 and any one of the groove walls of the first guide groove 175 is greater than or equal to 0.55 mm.
  • the second ejector portion S2 in each second guide groove 185 is located at the vertex position of the second guide groove 185, and the distance between the second ejector portion S2 and any one of the side walls of the second guide groove 185 is greater than or equal to 0.55 mm; when using the ejector pin for demoulding, the ejector pin is prevented from being too close to the groove wall of the first guide groove 175 and the second guide groove 185, and the ejector pin interferes with the flow channel formed by the groove wall.
  • the ejector pin When the lower plastic 10 is demolded by the ejector pin, the ejector pin simultaneously contacts the positions of the multiple first ejector pin portions S1 on the first surface 111 of the lower plastic 10 and the positions of the multiple second ejector pin portions S2 on the first bottom wall 171 and the second bottom wall 181, which is conducive to demolding the lower plastic body 11, the first protrusion 15 and the second protrusion 16 at the same time, improving the demolding uniformity of the lower plastic 10, and further improving the demolding yield of the lower plastic 10.
  • the radius of the push surface S11 of the first ejector pin portion S1 is greater than the radius of the push surface of the second ejector pin portion S2, and the end area of the ejector pin in contact with the first surface 111 of the lower plastic body 11 is larger, thereby increasing the contact area between the ejector pin and the first surface 111, and improving the demolding uniformity.
  • a plurality of third ejector pins S3 are located on the explosion-proof fence 14 , and are located at the intersection of the first rib 141 and the second rib 142 .
  • the plurality of third ejector pins S3 are divided into a plurality of groups, which can be referred to as third ejector pin groups.
  • Each third ejector pin group has two third ejector pins S3, and the two third ejector pins S3 are directly opposite to each other in the width direction (Y-axis direction) of the lower plastic 10 and are symmetrical with respect to the central axis A.
  • the push surface of the third ejector pin S3 is circular, and the radius of the push surface of the third ejector pin S3 is smaller than the radius of the push surface S11 of the first ejector pin S1.
  • a plurality of third ejector portions S3 are divided into three third ejector portion groups.
  • the third ejector portion S3 in the first group S3.1 is located at the cross-connection between the second sub-rib 1412 and the second rib 142.
  • the third ejector portion S3 in the second group S3.2 is located in the second sub-groove 122 and on the first sub-rib 1411.
  • the third ejector portion S3 in the third group S3.3 is located at the cross-connection between the third sub-rib 1413 and the second rib 142.
  • the three third ejector portions S3 on one side of the central axis A form a triangle, and the three third ejector portions S3 can serve to uniformly demold the explosion-proof fence 14.
  • Figure 10 is a schematic diagram of the assembly structure of the end cap and the lower plastic shown in Figure 4.
  • the lower plastic 10 is stacked on the end cap 40, and the first surface 111 of the lower plastic 10 is opposite to and in contact with the back surface 412 of the end cap 40.
  • the first pole through hole 113 of the lower plastic 10 is coaxially arranged with the first through hole 44 of the end cover 40 and is interconnected.
  • the injection through hole 114 of the lower plastic 10 is coaxially arranged with the injection hole 46 of the end cover 40 and is interconnected, and the explosion-proof fence 14 of the lower plastic 10 is arranged opposite to the explosion-proof valve 42 of the end cover 40.
  • the orthographic projection of the explosion-proof valve 42 falls into the orthographic projection of the first sub-groove 121.
  • the cross-sectional area of the first sub-groove 121 is greater than the cross-sectional area of the two second sub-grooves 122, which helps the gas generated in the electrode assembly 200 to flow to the explosion-proof valve 42, so as to facilitate the opening of the explosion-proof valve 42.
  • the area of the through groove 12 can be increased, and the flow area of the pressurized gas to the explosion-proof valve 42 can be increased.
  • the tabs or blue membranes are prone to rupture and produce fragments.
  • the explosion-proof fence 14 can prevent the tabs or blue membrane fragments from floating to the bottom of the explosion-proof valve 42 and blocking the gas passage, thereby causing explosion-proof failure. It can also prevent the tabs from directly contacting the explosion-proof valve 42 and causing a short circuit.
  • the side of the insulating film is bonded to the end cap assembly 100. Specifically, the side of the insulating film is hot-melt bonded to the opposite sides of the protrusion 13 of the lower plastic 10 along the width direction (Y-axis direction) of the lower plastic 10. The setting of the protrusion 13 facilitates the fixed connection between the insulating film and the lower plastic 10, ensuring the insulation between the electrode assembly 200 and the end cap 40.
  • the insulating film will pull the protrusion 13 of the lower plastic 10 toward the direction close to the electrode assembly 200, so that the middle part of the lower plastic 10 is bent and deformed, thereby forming a gas passage between the two second sub-grooves 122 of the lower plastic 10 and the end cap 40, so that the gas reaching the second sub-grooves 122 from the electrode assembly 200 can reach the explosion-proof valve 42 of the end cap 40 through the gas passage, which helps the gas in the electrode assembly 200 reach the explosion-proof valve 42.

Landscapes

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

Abstract

提供下塑胶、端盖组件、储能装置及用电设备。下塑胶包括下塑胶本体，所述下塑胶本体包括第一表面和第二表面，所述第一表面和所述第二表面沿所述下塑胶厚度方向背向设置；所述下塑胶本体上设有凸块、第一凸起和第二凸起，所述凸块、所述第一凸起和所述第二凸起均凸设于所述第二表面，沿所述下塑胶长度方向，所述第一凸起和所述第二凸起分别位于所述下塑胶本体的相对两端，且所述第一凸起和所述第二凸起均沿着所述下塑胶宽度方向延伸，所述凸块位于所述第一凸起和所述第二凸起之间，且与所述第一凸起、所述第二凸起间隔设置，所述凸块沿着所述下塑胶宽度方向延伸；所述凸块包括第一侧面，所述第一凸起包括第三侧面，所述第二凸起包括第五侧面，所述第一侧面、所述第三侧面、所述第五侧面位于所述下塑胶宽度方向的同一侧，所述第一侧面、所述第三侧面和所述第五侧面均具有一个注塑部。下塑胶具有较快的注塑速率以及较好的生产良率。

Description

下塑胶、端盖组件、储能装置及用电设备 技术领域
本申请涉及储能技术领域，尤其涉及一种下塑胶、端盖组件、储能装置及用电设备。
背景技术
二次电池(Rechargeable battery)又称为充电电池或蓄电池，是指在电池放电后可通过充电的方式使活性物质激活而继续使用的电池。二次电池的可循环利用特性使其逐渐成为用电设备的主要动力来源，随着二次电池的需求量逐渐增大，人们对其各方面的性能要求也越来越高，尤其是对于电池单位体积能量密度的要求，而电池的端盖组件的厚度是影响电池单位体积能量密度的重要参数，端盖组件过厚则降低电池单位体积的能量密度。目前的端盖组件包括用于顶盖和极柱之间进行绝缘的下塑胶，为了提升电池单位体积能量密度通常将下塑胶设计得很薄。现有的下塑胶因材料本身的成型收缩率较大(如：聚乙烯，英文名称:Polyethylene，成型收缩率在1.5％至3.6％之间)，现有的成型工艺未针对薄片状下塑胶的特殊结构进行流道设计，下塑胶成型过程容易因不均匀填充、内应力增大而导致翘曲或断裂，下塑胶的生产良率无法进一步提升，这成为降低二次电池生产成本的制约因素之一。
发明内容
本申请提供一种下塑胶、端盖组件、储能装置及用电设备，可以保证下塑胶的结构强度，提升下塑胶的生产良率。
第一方面，本申请提供一种下塑胶，用于储能装置，所述下塑胶包括下塑胶本体，所述下塑胶本体包括第一表面和第二表面，所述第一表面和所述第二表面沿所述下塑胶厚度方向背向设置；
所述下塑胶本体上设有凸块、第一凸起和第二凸起，所述凸块、所述第一凸起和所述第二凸起均凸设于所述第二表面，沿所述下塑胶长度方向，所述第一凸起和所述第二凸起分别位于所述下塑胶本体的相对两端，且所述第一凸起和所述第二凸起均沿着所述下塑胶宽度方向延伸，所述凸块位于所述第一凸起和所述第二凸起之间，且与所述第一凸起、所述第二凸起间隔设置，所述凸块沿着所述下塑胶宽度方向延伸；
所述凸块包括第一侧面，所述第一凸起包括第三侧面，所述第二凸起包括第五侧面，所述第一侧面、所述第三侧面、所述第五侧面位于所述下塑胶宽度方向的同一侧，所述第一侧面、所述第三侧面和所述第五侧面均具有一个注塑部。
一种可能的实施方式中，所述下塑胶设有通槽，所述通槽包括凸出所述第二表面的槽侧壁；
所述下塑胶还设有防爆栅栏，所述防爆栅栏设于所述通槽内且与所述槽侧壁背向所述第一表面的端部连接，所述防爆栅栏包括数个第一筋条和数个第二筋条，数个所述第一筋条沿所述下塑胶宽度方向延伸且连接所述通槽的槽侧壁，数个所述第二筋条沿所述下塑胶长度方向延伸且连接所述通槽的槽侧壁，数个所述第一筋条与数个所述第二筋条交叉连接。
一种可能的实施方式中，所述第一表面具有多个第一顶针部，多个所述第一顶针部相对中轴线对称，所述中轴线为沿所述下塑胶长度方向延伸且位于所述下塑胶宽度方向的中部的直线。
一种可能的实施方式中，沿所述下塑胶宽度方向，多个所述第一顶针部位于所述中轴线相对两侧，多个所述第一顶针部相对所述中轴线两两对称。
一种可能的实施方式中，所述中轴线上具有所述第一顶针部，所述中轴线上的所述第一顶针部相对所述中轴线对称。
一种可能的实施方式中，所述下塑胶设有第一凹槽，所述第一凹槽自所述第一表面向所述第一凸起内凹陷形成，所述第一凹槽包括第一底壁和沿所述下塑胶长度方向相对设置的第一侧壁和第二侧壁；
所述下塑胶设有第二凹槽，所述第二凹槽自所述第一表面向所述第二凸起内凹陷形成，所述第二凹槽包括第二底壁和沿所述下塑胶长度方向相对设置的第三侧壁和第四侧壁；
所述第一底壁和所述第二底壁设有多个第二顶针部，多个所述第二顶针部相对所述中轴线两两对称。
一种可能的实施方式中，所述第一凹槽内具有数个第一导流槽，数个所述第一导流槽沿所述下塑胶宽度方向依次排列，数个所述第一导流槽的体积相等，沿所述下塑胶宽度方向，每个所述第一导流槽的长度尺寸为12.00mm-16.00mm，沿所述下塑胶长度方向，每个所述第一导流槽的宽度尺寸为7.00mm-11.00mm；
所述第二凹槽内具有数个第二导流槽，数个所述第二导流槽沿所述下塑胶宽度方向依次排列，数个所述第二导流槽的体积相等，沿所述下塑胶宽度方向，每个所述第二导流槽的长度尺寸为12.00mm-14.00mm，沿所述下塑胶长度方向，每个所述第二导流槽的宽度尺寸为7.00mm-11.00mm。
一种可能的实施方式中，每个所述第一顶针部的抵推面为圆形，每个所述第二顶针部的抵推面为圆形，每个所述第一顶针部的抵推面的半径大于每个所述第二顶针部的抵推面的半径。
一种可能的实施方式中，所述第二顶针部的抵推面的半径范围为1.5mm-3.0mm。
一种可能的实施方式中，所述第一凹槽包括沿所述下塑胶宽度方向相对设置的两个端壁，所述第一导流槽的数量为四个，每个所述第一导流槽中具有一个所述第二顶针部，沿下塑胶宽度方向，位于外侧的两个所述第一导流槽中的所述第二顶针部分别靠近所述第一凹槽的两个所述端壁，位于中间的两个所述第一导流槽中的所述第二顶针部分别位于所述中轴线相对两侧，且相邻设置，四个所述第一导流槽中的所述第二顶针部均靠近所述第一凹槽的侧壁，且沿着所述第一凹槽长度方向间隔排列。
一种可能的实施方式中，每个所述第一导流槽内的所述第二顶针部与所述第一导流槽的任意一个槽壁之间的距离大于或等于0.55mm。
一种可能的实施方式中，所述第二凹槽包括沿所述下塑胶宽度方向相对设置的两个端壁，所述第二导流槽的数量为四个，每个所述第二导流槽中具有一个所述第二顶针部，沿所述下塑胶宽度方向，位于外侧的两个所述第二导流槽中的所述第二顶针部分别靠近所述第二凹槽的两个所述端壁，位于中间的两个所述第二导流槽中的所述第二顶针部分别位于所述中轴线相对两侧，且相邻设置，四个所述第二导流槽中的所述第二顶针部均靠近所述第二凹槽的侧壁，且沿着所述第二凹槽长度方向间隔排列。
一种可能的实施方式中，每个所述第二导流槽内的所述第二顶针部与所述第二导流槽的任意一个槽壁之间的距离大于或等于0.55mm。
一种可能的实施方式中，数个所述第一筋条和数个所述第二筋条的交叉连接处具有多个第三顶针部，多个所述第三顶针部相对所述中轴线两两对称。
一种可能的实施方式中，多个所述第三顶针部的抵推面为圆形，每个所述第一顶针部的抵推面的半径大于每个所述第三顶针部的抵推面的半径。
一种可能的实施方式中，所述通槽包括第一子槽和两个第二子槽，沿所述下塑胶宽度方向，两个所述第二子槽分别位于所述第一子槽的相对两侧，且两个第二子槽分别与所述第一子槽相互连通；
沿所述下塑胶长度方向，所述第一子槽的宽度尺寸大于每个所述第二子槽的宽度尺寸。
第二方面，本申请提供一种端盖组件，包括端盖和如上所述的下塑胶，所述端盖设有防爆阀；
所述下塑胶设有通槽，所述通槽包括第一子槽和两个第二子槽，沿所述下塑胶宽度方向，两个所述第二子槽分别位于所述第一子槽的相对两侧，且两个第二子槽分别与所述第一子槽相互连通；
所述下塑胶装于所述端盖的表面，且所述下塑胶的第一表面朝向所述端盖，沿所述端盖组件厚度方向，所述防爆阀的正投影落入所述第一子槽的正投影内。
第三方面，本申请提供一种储能装置，包括壳体、电极组件和如上所述的端盖组件，所述壳体具有开口，所述壳体设有容纳腔，所述电极组件容纳于所述容纳腔内，所述端盖组件覆盖所述开口。
第四方面，本申请提供一种用电设备，包括如上所述的储能装置，所述储能装置用于储存电能。
本申请通过使注塑部位于下塑胶的凸块、第一凸起和第二凸起沿下塑胶宽度方向的同一侧的表面，当下塑胶在模具内注塑成型时，可以从三个注塑部所在位置同时注入熔融塑胶液，加快熔融塑胶液充满模腔的速度，缩短下塑胶的注塑时间，提升下塑胶的生产效率。此外，沿下塑胶长度方向，凸块位于下塑胶的中间位置，第一凸起和第二凸起分别位于下塑胶的相对两端，并且，凸块、第一凸起和第二凸起是凸设于下塑胶本体的三个立体结构，每个立体结构的流道与下塑胶本体的流道连接形成大致呈“Z”字形流道，且“Z”字形流道具有两个直角拐角，结构简单。凸块、第一凸起和第二凸起的延伸方向均与最初注入的高速熔融塑胶液的流动方向一致，从三个注塑部所在位置高速注入熔融塑胶液，可以使熔融塑胶液快速地充满流道的直角拐角，避免在直角拐角处形成涡流，进而避免降低下塑胶对应直角拐角所在位置的结构强度。熔融塑胶液经过直角拐角进入下塑胶本体的大面模腔后，流速较缓，可以更加均匀地填满下塑胶本体的大面模腔，提升下塑胶的生产良率。
附图说明
为了更清楚地说明本申请的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施方式，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，还可以如这些附图获得其他的附图。
图1为本申请实施例提供的储能装置的应用场景图；
图2为图1所示的储能装置的结构示意图；
图3为图2所示的储能装置的端盖组件的分解示意图；
图4为图3所示端盖的结构示意图；
图5为图4所示端盖的另一角度结构示意图；
图6为图3所示下塑胶的结构示意图；
图7为图6所示下塑胶的第二角度结构示意图；
图8a为图6所示下塑胶的第三角度结构示意图，其中展示了所有顶针部；
图8b为图6所示下塑胶的第三角度结构示意图，其中忽略了第一顶针部；
图9为图6所示下塑胶的局部截面结构图；
图10为图4所示端盖与下塑胶的装配结构示意图。
附图标记说明：
5000-储能系统，4100-第一电能转换装置，4200-第二电能转换装置，3000-第一用电设备，
2000-第二用电设备，1000-储能装置，100-端盖组件，200-电极组件，10-下塑胶，40-端盖，50-上塑胶组件，60-压片组件，70-电极极柱，71-正极极柱，72-负极极柱，51-第一上塑胶，52-第二上塑胶，80-密封圈，61-第一压片，62-第二压片，41-端盖本体，42-防爆阀，44-第一通孔，45-第二通孔，46-注液孔，411-正面，412-背面，418-焊接槽，11-下塑胶本体，111-第一表面，112-第二表面，113-第一极柱通孔，114-注液通孔，115-第二极柱通孔，118-第三表面，119-第四表面，12-通槽，121-第一子槽，122-第二子槽，1211-第一壁，1212-第二壁，1211a-第一子壁，1211b-第二子壁，1212a-第三子壁，1212b-第四子壁，1221-第三壁，1222-第四壁，1223-第五壁，13-凸块，131-第一侧面，132-第二侧面，14-防爆栅栏，141-第一筋条，142-第二筋条，1411-第一子筋条，1412-第二子筋条，1413-第三子筋条，15-第一凸起，16-第二凸起，151-第三侧面，152-第四侧面，17-第一凹槽，171-第一底壁，172-第一侧壁，173-第二侧壁，174-第一加强筋，175-第一导流槽，178-第一导流孔，161-第五侧面，162-第六侧面，18-第二凹槽，181-第二底壁，182-第三侧壁，183-第四侧壁，184-第二加强筋，185-第二导流槽，188-第二导流孔，19-注塑部，S1-第一顶针部，S11-抵推面，S2-第二顶针部，S3-第三顶针部，A-中轴线。
具体实施方式
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、完整地描述，显然，所描述的实施例仅仅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。
由于人们所需要的能源都具有很强的时间性和空间性，为了合理利用能源并提高能量的利用率，需要通过一种介质或者设备，把一种能量形式用同一种或者转换成另外一种能量形式存储起来，基于未来应用需要再以特定能量形式释放出来。众所周知，要实现碳中和的大目标，目前绿色电能的产生主要途径是发展光伏、风电等绿色能源来替代化石能源。目前绿色电能的产生普遍依赖于光伏、风电、水势等，而风能和太阳能等普遍存在间歇性强、波动性大的问题，会造成电网不稳定，用电高峰电不够，用电低谷电太多，不稳定的电压还会对电力造成损害，因此可能因为用电需求不足或电网接纳能力不足，引发“弃风弃光”问题，要解决这些问题须依赖储能。即将电能通过物理或者化学的手段转化为其他形式的能量存储起来，在需要的时候将能量转化为电能释放出来，简单来说，储能就类似一个大型“充电宝”，在光伏、风能充足时，将电能储存起来，在需要时释放储能的电力。
以电化学储能为例，本方案提供一种储能装置，储能装置内设有一组化学电池，主要是利用化学电池内的化学元素做储能介质，充放电过程伴随储能介质的化学反应或者变化，简单说就是把风能和太阳能产生的电能存在化学电池中，在外部电能的使用达到高峰时再将存储的电量释放出来使用，或者转移给电量紧缺的地方再使用。
目前的储能(即能量存储)应用场景较为广泛，包括(风光)发电侧储能、电网侧储能、基站侧储能以及用户侧储能等方面，对应的储能装置的种类包括有：
(1)应用在电网侧储能场景的大型储能集装箱，其可作为电网中优质的有功无功调节电源，实现电能在时间和空间上的负荷匹配，增强可再生能源消纳能力，并在电网系统备用、缓解高峰负荷供电压力和调峰调频方面意义重大；
(2)应用在用户侧的工商业储能场景(银行、商场等)的中小型储能电柜，主要运行模式为“削峰填谷”。由于根据用电量需求在峰谷位置的电费存在较大的价格差异，用户有储能设备后，为了减少成本，通常在电价低谷期，对储能柜/箱进行充电处理；电价高峰期，再将储能设备中的电放出来进行使用，以达到节省电费的目的。
需要说明的是，上述储能集装箱、中小型储能电柜、户用小型储能箱等包含储能装置的设备可以理解为是用电设备。
请参阅图1，图1是本申请实施例提供的储能装置的应用场景图。本申请实施例提供的储能装置应用于一种储能系统5000，该储能系统5000包括第一电能转换装置4100(光伏板)、第二电能转换装置4200(风机)、第一用电设备3000(电网)、第二用电设备2000(基站)以及储能装置1000。该储能系统5000还包括储能柜，储能装置1000装于储能柜，储能柜可以安装于室外。具体的，第一电能转换装置4100可以在电价低谷时期将太阳能转换为电能，储能装置1000用于储存该电能并在用电高峰时供给第一用电设备3000或者第二用电设备2000，或者在第一用电设备3000或者第二用电设备2000断电/停电时进行供电。第二电能转换装置4200可以将风能转换为电能，储能装置1000用于储存该电能并在用电高峰时供给第一用电设备3000或者第二用电设备2000，或者在第一用电设备3000或者第二用电设备2000断电/停电时进行供电。其中，电能的传输可以采用高压线缆进行传输。
需要说明的是，上述第一用电设备3000、第二用电设备2000等包含储能装置的设备可以理解为是用电设备。
储能装置1000的数量可以为数个，数个储能装置1000相互串联或并联。本实施例中，“数个”是指两个及两个以上。
可以理解的是，储能装置1000可包括但不限于单体电池、电池模组、电池包、电池系统等。本申请实施例提供的储能装置1000的实际应用形态可以为但不限于为所列举产品，还可以是其他应用形态，本申请实施例不对储能装置1000的应用形态做严格限制。本申请实施例仅以储能装置1000为多芯电池为例进行说明。
请参阅图2，图2为图1所示的储能装置的结构示意图。储能装置1000包括壳体(图未示)、端盖组件100和电极组件200。壳体具有开口，壳体设有容纳腔，电极组件200容纳于容纳腔内，端盖组件100覆盖开口，壳体包裹电极组件200周围及底部，且壳体与端盖组件100密封连接。
本实施例中，电极组件200外侧还包覆有绝缘膜(图未示)，用于保护极芯，避免极芯被刮伤。绝缘膜包覆于电极组件200外表面，且绝缘膜的侧边与端盖组件100热熔粘接。
为方便描述，定义图2所示端盖组件100的长度方向为X轴方向，端盖组件100的宽度方向为Y轴方向，端盖组件100的厚度方向为Z轴方向，X轴方向、Y轴方向和Z轴方向两两相互垂直。本申请实施例描述所提及的“上”、“下”等方位用词是依据说明书附图2所示方位进行的描述，以朝向Z轴正方向为“上”，以朝向Z轴负方向为“下”，其并不形成对储能装置1000于实际应用场景中的限定。以下文中所用到的“相同”、“相等”或者“平行”均允许有一定的公差存在。
请参阅图3，图3为图2所示的储能装置的端盖组件的分解示意图。端盖组件100包括下塑胶10和端盖40，下塑胶10安装在端盖40上。本实施例中的端盖40为光铝件，下塑胶10为塑料材质制成且绝缘。端盖组件100还包括上塑胶组件50、压片组件60和电极极柱70。具体的，端盖40和下塑胶10层叠设置，且下塑胶10用于绝缘端盖40与电极组件200。上塑胶组件50和端盖40层叠设置，且上塑胶组件50位于端盖40背离下塑胶10的一侧。电极极柱70包括正极极柱71和负极极柱72。上塑胶组件50包括第一上塑胶51和第二上塑胶52，第一上塑胶51和第二上塑胶52并排装于端盖40沿端盖组件100长度方向(X轴方向)的两端。第一上塑胶51和第二上塑胶52上均设有通孔，分别用于供正极极柱71和负极极柱72穿过。正极极柱71和负极极柱72上套有密封圈80。压片组件60包括第一压片61和第二压片62，第一压片61和第二压片62层叠设于上塑胶组件50背离端盖40的一侧，且分别与第一上塑胶51和第二上塑胶52固定连接。
请参阅图4和图5，图4为图3所示端盖的结构示意图，图5为图4所示端盖的另一角度结构示意图。本实施例中，端盖40包括端盖本体41和防爆阀42。端盖本体41设有第一通孔44、第二通孔45和注液孔46。沿端盖组件100长度方向(X轴方向)，第一通孔44、注液孔46、防爆阀42及第二通孔45依次间隔排列。
具体的，端盖本体41为长条形薄板，其包括正面411和与正面411背向设置的背面412。位于端盖本体41中部位置，还设有贯穿背面412和正面411的焊接槽418，且焊接槽418位于第一通孔44和第二通孔45之间。防爆阀42容置焊接槽418内并与焊接槽418槽壁焊接。当储能装置1000内部压力过大时，防爆阀42会自动打开泄压，以防止出现爆炸的情况。
可以理解，第一通孔44和第二通孔45分别设于端盖本体41的相对两端，且贯穿所述正面411和所述背面412。本实施例中，第一通孔44和第二通孔45分别用于供储能装置1000的正极极柱71和负极极柱72穿过。在其他实施例中，第一通孔44也可以用于供负极极柱72穿过，第二通孔45也可以用于供正极极柱71穿过。
注液孔46设于第一通孔44和防爆阀42之间，在储能装置1000的注液工序中，通过端盖40上的注液孔46向储能装置1000内注入电解液。
请参阅图6和图7，图6为图3所示下塑胶的结构示意图，图7为图6所示下塑胶的第二角度结构示意图。本实施例中，下塑胶10包括下塑胶本体11。下塑胶本体11大致为矩形薄板，其包括第一表面111、第二表面112、第三表面118和第四表面119，沿下塑胶10厚度方向(Z轴方向)，第一表面111和第二表面112背向设置；沿下塑胶10宽度方向(Y轴方向)，第三表面118和第四表面119背向设置，第三表面118和第四表面119连接于第一表面111和第二表面112之间。
本实施例中，下塑胶本体11上还设有第一极柱通孔113、注液通孔114和第二极柱通孔115。沿下塑胶10长度方向(X轴方向)，第一极柱通孔113、注液通孔114和第二极柱通孔115依次设于下塑胶本体11上。
本实施例中，第一极柱通孔113为方形通孔。第一极柱通孔113贯穿第一表面111和第二表面112。第一极柱通孔113用于供正极极柱71穿过。在其他实施例中，第一极柱通孔113也可以用于供负极极柱72穿过。
本实施例中，第二极柱通孔115为方形通孔。沿下塑胶10长度方向(X轴方向)，第二极柱通孔115位于下塑胶本体11远离第一极柱通孔113的一端。第二极柱通孔115贯穿第一表面111和第二表面112。第二极柱通孔115用于供负极极柱72穿过。在其他实施例中，第二极柱通孔115也可以用于供正极极柱71穿过。
注液通孔114贯穿下塑胶本体11的第一表面111和第二表面112。注液通孔114位于第一极柱通孔113的侧边，注液通孔114用于与注液孔46配合，供电解液通过并流入电极组件200。
如图6和图7，本实施例中，下塑胶本体11还设有通槽12。沿下塑胶10长度方向(X轴方向)，通槽12位于下塑胶本体11的中间位置。沿下塑胶10厚度方向(Z轴方向)，通槽12贯穿第一表面111和第二表面112。通槽12包括第一子槽121和两个第二子槽122。
沿下塑胶10长度方向(X轴方向)，第一子槽121包括相对设置的第一壁1211和第二壁1212。第一壁1211包括第一子壁1211a和两个第二子壁1211b。第一子壁1211a沿下塑胶10宽度方向(Y轴方向)延伸。沿下塑胶10宽度方向(Y轴方向)，两个第二子壁1211b分别位于第一子壁1211a的相对两侧，且与第一子壁1211a连接。两个第二子壁1211b为弧形，且背向第一壁1211和第二壁1212之间弯曲。第二壁1212包括第三子壁1212a和两个第四子壁1212b。第三子壁1212a沿下塑胶10宽度方向(Y轴方向)延伸。沿下塑胶10宽度方向(Y轴方向)，两个第四子壁1212b分别位于第三子壁1212a的相对两侧，且与第三子壁1212a连接。两个第四子壁1212b为弧形，且背向第一壁1211和第二壁1212之间弯曲。沿下塑胶10长度方向(X轴方向)，第一子壁1211a和第三子壁1212a相对且平行设置(允许有一定工艺公差)，两个第二子壁1211b与两个第四子壁1212b相对设置，可以理解为，第一子槽121整体轮廓为“椭圆跑道”形。
两个第二子槽122均为矩形通槽。沿下塑胶10长度方向(X轴方向)，两个第二子槽122均包括相对设置的第三壁1221和第四壁1222。第三壁1221和第四壁1222平行设置(允许有一定工艺公差)，且均沿下塑胶10宽度方向(Y轴方向)延伸。两个第二子槽122还包括第五壁1223，第五壁1223沿下塑胶10长度方向(X轴方向)延伸，且连接于第三壁1221和第四壁1222之间。
沿下塑胶10宽度方向(Y轴方向)，第一子槽121位于中间位置，两个第二子槽122分别位于第一子槽121的相对两侧，且均与第一子槽121连通。沿下塑胶10宽度方向(Y轴方向)，两个第二子壁1211b分别连接第一子壁1211a和两个第二子槽122的第三壁1221，第一子壁1211a、两个第二子壁1211b和两个第三壁1221共同构成通槽12的第一槽侧壁。沿下塑胶10宽度方向(Y轴方向)，两个第四子壁1212b分别连接第三子壁1212a和两个第二子槽122的第四壁1222，第三子壁1212a、两个第四子壁1212b和两个第四壁1222共同构成通槽12的第二槽侧壁。沿下塑胶10宽度方向(Y轴方向)，两个第二子槽122的第五壁1223相对设置，两个第五壁1223分别相当于通槽12的第三槽侧壁和第四槽侧壁。沿下塑胶10长度方向(X轴方向)，第一子壁1211a和第三子壁1212a之间的距离大于第三壁1221和第四壁1222之间的距离，即相当于，第一子槽121的宽度尺寸大于第二子槽122的宽度尺寸。沿下塑胶10厚度方向(Z轴方向)，第一子槽121的横截面面积大于两个第二子槽122的横截面面积。
通槽12用于将电极组件200中产生的压力气体通向防爆阀42。第一子槽121的横截面面积大于两个第二子槽122的横截面面积，有助于电极组件200中产生的气体流通至防爆阀42，以便于防爆阀42开阀。通过在第一子槽121的两侧分别设置两个第二子槽122，可以增大通槽12的面积，增加压力气体通向防爆阀42的流通面积。
本实施例中，下塑胶10设有通槽12的位置厚度大于其他位置厚度。具体的，通槽12由下塑胶本体11的第一表面111向第二表面112方向凹陷且在第二表面112上形成凸块13。通槽12同时贯穿第一表面111和凸块13，通槽12的槽侧壁包括第一表面111和第二表面112 之间的部分以及凸出于第二表面112的部分。沿下塑胶10宽度方向(Y轴方向)，凸块13包括背向设置的第一侧面131和第二侧面132。
如图6和图7，本实施例中，下塑胶10还包括防爆栅栏14，防爆栅栏14为网格状薄板。防爆栅栏14装设于通槽12内，且与通槽12的槽侧壁凸出第二表面112的端部连接。在下塑胶10厚度方向(Z轴方向)上，防爆栅栏14覆盖通槽12。
防爆栅栏14包括数个第一筋条141和数个第二筋条142。数个第一筋条141沿下塑胶10长度方向(X轴方向)并排且间隔设置，每个第一筋条141沿下塑胶10宽度方向(Y轴方向)延伸。数个第一筋条141包括一个第一子筋条1411，第一子筋条1411连接两个第五壁1223，即相当于连接通槽12的第三槽侧壁和第四槽侧壁；数个第一筋条141包括一个第二子筋条1412，第二子筋条1412连接两个第二子壁1211b，数个第一筋条141包括一个第三子筋条1413，第三子筋条1413连接两个第四子壁1212b。本实施例中，第一筋条141的数量为3个。
数个第二筋条142沿下塑胶10宽度方向(Y轴方向)并排且间隔设置，每个第二筋条142连接通槽12的第一槽侧壁和第二槽侧壁。具体的，数个第二筋条142中的两个第二筋条142连接一个第二子槽122的第三壁1221和第四壁1222；数个第二筋条142中的两个第二筋条142连接另一个第二子槽122的第三壁1221和第四壁1222；数个第二筋条142中的五个第二筋条142连接第一子槽121的第一壁1211和第二壁1212。本实施例中，第二筋条142的数量为9个。第一子筋条1411、第二子筋条1412、第三子筋条1413和数个第二筋条142形成网格状防爆栅栏14。
由于储能装置1000在运输过程中，极耳或蓝膜易破裂产生碎片。通过在通槽12内设置防爆栅栏14，可以避免极耳或蓝膜的碎片漂浮至防爆阀42的下方，遮挡过气通道，进而引起防爆失效，又可以防止极耳直接接触防爆阀42。数个第一筋条141和数个第二筋条142交叉设置，可以增强防爆栅栏14的结构强度。
如图6和图7，本实施例中，下塑胶10还包括第一凸起15和第二凸起16。第一凸起15和第二凸起16凸设于下塑胶本体11的第二表面112，且位于下塑胶10沿长度方向(X轴方向)的相对两端。第一凸起15与第一极柱通孔113相邻设置，且第一凸起15位于第一极柱通孔113背向通槽12的一侧。第二凸起16与第二极柱通孔115相邻设置，且第二凸起16位于第二极柱通孔115背向通槽12的一侧。
第一凸起15为矩形块状，且沿着下塑胶10宽度方向(Y轴方向)延伸。本实施例中，沿下塑胶10长度方向(X轴方向)，第一凸起15的一侧与下塑胶本体11的端部边缘平齐，沿下塑胶10宽度方向(Y轴方向)，第一凸起15的两端与下塑胶本体11的两侧边缘平齐。可以理解为，第一凸起15的长度尺寸与下塑胶本体11的宽度尺寸相同。沿下塑胶10宽度方向(Y轴方向)，第一凸起15包括背向设置的第三侧面151和第四侧面152。
如图6，下塑胶本体11的第一表面111与第一凸起15对应的区域设有第一凹槽17，第一凹槽17自第一表面111沿着下塑胶10厚度方向(Z轴方向)向第一凸起15内凹陷。第一凹槽17包括第一底壁171以及沿下塑胶10长度方向(X轴方向)相对设置的第一侧壁172和第二侧壁173。第一凹槽17还包括沿下塑胶10宽度方向(Y轴方向)相对设置的两个端壁。在第一凸起15的对应区域设置第一凹槽17，保证了第一凹槽17的深度，可以节约下塑胶10的材料有利于节省制造成本，而且还可以减轻下塑胶10的重量，有利于储能装置1000的轻量化设计。
具体的，沿下塑胶10厚度方向(Z轴方向)，第一凹槽17的正投影与第一凸起15的正投影完全重合，或者，第一凹槽17的正投影在第一凸起15的正投影区域内；可以理解第一 凹槽17的轮廓与第一凸起15的外轮廓相同或者相近。
第一凹槽17内设有数个第一加强筋174，数个第一加强筋174凸设于第一底壁171，并且连接于第一侧壁172与第二侧壁173之间；沿着下塑胶10宽度方向(Y轴方向)，数个第一加强筋174间隔排列，且将第一凹槽17划分为数个第一导流槽175。沿下塑胶10宽度方向，数个第一导流槽175依次排列。数个第一加强筋174可以增强第一凹槽17的强度。具体的，本实施例中，第一加强筋174的数量为3个，三个第一加强筋174将第一凹槽17划分为四个体积相等的第一导流槽175。第一导流槽175的槽壁实际上是由第一凹槽17的侧壁、第一凹槽17的端壁以及数个第一加强筋174形成。本实施例中，沿下塑胶10长度方向(X轴方向)，第一侧壁172和第二侧壁173之间的距离为7.00mm-11.00mm，具体的，第一侧壁172和第二侧壁173之间的距离为9.22mm，可以理解第一导流槽175的宽度尺寸为7.00mm-11.00mm，具体的，第一导流槽175的宽度尺寸为9.22mm；沿下塑胶10宽度方向(Y轴方向)，相邻两个第一加强筋174之间的距离为12.00mm-16.00mm，具体的，相邻两个第一加强筋174之间的距离为14.72mm，可以理解第一导流槽175的长度尺寸为12.00mm-16.00mm，具体的，第一导流槽175的长度尺寸为14.72mm。
下塑胶10还设有数个第一导流孔178，数个第一导流孔178设于第一凹槽17的第一底壁171上，且第一导流孔178沿下塑胶10厚度方向(Z轴方向)贯穿第一凸起15与第一表面111，即，在下塑胶10厚度方向(Z轴方向)，每个第一导流孔178贯穿第一凹槽17的底壁。数个第一导流孔178沿着第一凹槽17的长度方向间隔排列。具体的，本实施例中，第一导流孔178排布于第一导流槽175内；第一导流孔178的数量为4个，且每个第一导流槽175内设有一个第一导流孔178。在注液或者使用过程中，第一导流孔178能够将从注液通孔114喷溅至端盖40和下塑胶10的第一表面111之间的电解液，经过第一凹槽17，流经数个第一导流孔178，再通过第一导流孔178导流回电极组件200中，实现电解液的回流和重复利用，以防止电解液留存端盖40和下塑胶10的第一表面111之间，避免在下塑胶10的第一表面111和第一凹槽17产生积液，提高电极组件200的浸润性。
第二凸起16为矩形块状，且沿着下塑胶10宽度方向(Y轴方向)延伸。本实施例中，沿下塑胶10长度方向(X轴方向)，第二凸起16的一侧与下塑胶本体11的端部边缘平齐，沿下塑胶10宽度方向(Y轴方向)，第二凸起16的两端与下塑胶本体11的两侧边缘平齐。可以理解为，第二凸起16的长度尺寸与下塑胶本体11的宽度尺寸相同。沿下塑胶10宽度方向(Y轴方向)，第二凸起16包括背向设置的第五侧面161和第六侧面162。
如图6，下塑胶本体11的第一表面111与第二凸起16对应的区域设有第二凹槽18，第二凹槽18自第一表面111沿着下塑胶10厚度方向(Z轴方向)向第二凸起16内凹陷。第二凹槽18包括第二底壁181以及沿下塑胶10长度方向(X轴方向)相对设置的第三侧壁182和第四侧壁183。第二凹槽18还包括沿下塑胶10宽度方向(Y轴方向)相对设置的两个端壁。在第二凸起16的对应区域设置第二凹槽18，保证了第二凹槽18的深度，可以节约下塑胶10的材料有利于节省制造成本，而且还可以减轻下塑胶10的重量，有利于储能装置1000的轻量化设计。
具体的，沿下塑胶10厚度方向(Z轴方向)，第二凹槽18的正投影与第二凸起16的正投影完全重合，或者，第二凹槽18的正投影在第二凸起16的正投影区域内；可以理解第二凹槽18的轮廓与第二凸起16的外轮廓相同或者相近。
第二凹槽18内设有数个第二加强筋184，数个第二加强筋184凸设于第二底壁181，并且连接于第三侧壁182与第四侧壁183之间；沿着下塑胶10宽度方向(Y轴方向)，数个第 二加强筋184间隔排列，且将第二凹槽18划分为数个第二导流槽185。沿下塑胶10宽度方向，数个第二导流槽185依次排列。数个第二加强筋184可以增强第二凹槽18的强度。具体的，本实施例中，第二加强筋184的数量为3个，三个第二加强筋184将第二凹槽18划分为四个体积相等的第二导流槽185。第二导流槽185的槽壁实际上是由第二凹槽18的侧壁、第二凹槽18的端壁以及数个第二加强筋184形成。本实施例中，沿下塑胶10长度方向(X轴方向)，第三侧壁182和第四侧壁183之间的距离为7.00mm-11.00mm，具体的，第三侧壁182和第四侧壁183之间的距离为9.22mm，可以理解第二导流槽185的宽度尺寸为7.00mm-11.00mm，具体的，第二导流槽185的宽度尺寸为9.22mm；沿下塑胶10宽度方向(Y轴方向)，相邻两个第二加强筋184之间的距离为12.00mm-16.00mm，具体的，相邻两个第二加强筋184之间的距离为14.72mm，可以理解第二导流槽185的长度尺寸为12.00mm-16.00mm，具体的，第二导流槽185的长度尺寸为14.72mm。
下塑胶10还设有数个第二导流孔188，数个第二导流孔188设于第二凹槽18的第二底壁181上，且第二导流孔188沿下塑胶10厚度方向(Z轴方向)贯穿第二凸起16与第一表面111，即，在下塑胶10厚度方向，每个第二导流孔188贯穿所述第二凹槽18的底壁。数个第二导流孔188沿着第二凹槽18的长度方向间隔排列。具体的，本实施例中，第二导流孔188排布于第二导流槽185内；第二导流孔188的数量为4个，且每个第二导流槽185内设有一个第二导流孔188。在注液或者使用过程中，第二导流孔188能够将从注液通孔114喷溅至端盖40和下塑胶10的第一表面111之间的电解液，经过第二凹槽18，流经数个第二导流孔188，再通过第二导流孔188导流回电极组件200中，实现电解液的回流和重复利用，以防止电解液留存端盖40和下塑胶10的第一表面111之间，避免在下塑胶10的第一表面111和第二凹槽18产生积液，提高电极组件200的浸润性。
下塑胶10通过注塑工艺制作而成，注塑时通过模具(图未示)的注塑口向模具的模腔中注入经高温熔化的熔融塑胶液，熔融塑胶液填满模腔后，待高温的熔融塑胶液温度降低使得熔融塑胶液凝固成型后，进行脱模，得到下塑胶10。下塑胶10的表面形成注塑部，一方面，从模具角度来看，注塑部与模具的注塑口的位置对应，另一方面，从下塑胶10角度来看，注塑部为下塑胶10外表面的某个位置。
需要说明的是，当塑胶在模具内成型后，如塑胶稍微过量，则注塑部会残留下凸起，如塑胶略有不足，则注塑部会形成凹槽。对于残留有凸起的情况，脱模后，如剪切或打磨掉该凸起，则在最终产品上并不会留下该凸起，注塑部会形成与其他部分齐平的平面结构。当然，在一些情况下，也可保留该凸起。对于本申请实施例而言，注塑部可以为凸起、凹槽或平面。
请参阅图6，本实施例中，下塑胶10具有多个注塑部19。多个注塑部19分布于凸块13、第一凸起15和第二凸起16，且分别位于凸块13、第一凸起15和第二凸起16沿下塑胶10宽度方向(Y轴方向)的一侧。
沿下塑胶10长度方向，第一凸起15和第二凸起16分别位于下塑胶本体11的相对两端，凸块13位于第一凸起15和第二凸起16之间，且与第一凸起15、第二凸起16间隔设置。凸块13包括第一侧面131，第一凸起15包括第三侧面151，第二凸起16包括第五侧面161，第一侧面131、第三侧面151、第五侧面161位于下塑胶10宽度方向(Y轴方向)的同一侧。第一侧面131、第三侧面151、第五侧面161与第三表面118共面。下塑胶10的第一侧面131、第三侧面151、第五侧面161上具有一个注塑部19。
具体的，本实施例中，注塑部19的数量为三个，且分别位于凸块13的第一侧面131、第一凸起15的第三侧面151和第二凸起16的第五侧面161。在其他实施例中，注塑部19也 可以分别位于凸块13的第二侧面132、第一凸起15的第四侧面152和第二凸起16的第六侧面162，只需使注塑部19位于下塑胶10宽度方向(Y轴方向)的同一侧。
当下塑胶10在模具内注塑成型时，可以从三个注塑部19所在位置同时注入熔融塑胶液，加快熔融塑胶液充满模腔的速度，缩短下塑胶10的注塑时间，提升下塑胶10的生产效率。此外，沿下塑胶10长度方向(X轴方向)，凸块13位于下塑胶10的中间位置，第一凸起15和第二凸起16分别位于下塑胶10的相对两端，从三个注塑部19所在位置注入熔融塑胶液，可以使熔融塑胶液均匀填满模腔，提升下塑胶10的生产良率。
第一凸起15、凸块13和第二凸起16均为凸设于下塑胶本体11的第二表面112的立体结构，从三个注塑部19注入熔融塑胶液，熔融塑胶液在三个立体结构的流道中沿下塑胶10厚度方向流动，之后进入下塑胶本体11的大面模腔中流动；在下塑胶10宽度方向(Y轴方向)与三个注塑部19相对的另一侧，熔融塑胶液再从下塑胶本体11的大面模腔进入三个立体结构的流道；因此每个立体结构的流道与下塑胶本体11的流道连接形成大致呈“Z”字形流道，且“Z”字形流道具有两个直角拐角，结构简单。第一凸起15、凸块13和第二凸起16的延伸方向均与最初注入的高度熔融塑胶液的流动方向一致。从三个注塑部19所在位置高速注入熔融塑胶液，可以使熔融塑胶液快速地充满直角拐角，避免在直角拐角处形成涡流，进而避免降低下塑胶本体11上对应直角拐角所在位置的结构强度。熔融塑胶液经过直角拐角进入下塑胶本体11的大面模腔后，流速较缓，可以更加均匀地填满下塑胶本体11的大面模腔，提升下塑胶10的生产良率。
在模具内注射熔融塑胶液时，由于注塑部19所在位置位于下塑胶10宽度方向(Y轴方向)的同一侧，熔融塑胶液会沿着下塑胶10宽度方向(Y轴方向)流动，即沿着第一筋条141的延伸方向流动。第一筋条141较长，且第一筋条141的延伸方向与初始注入的熔融塑胶液流动方向一致，熔融塑胶液填充第一筋条141的流道的过程更加顺畅均匀。第二筋条142介于相邻两个第一筋条141之间的部分是由相邻两个第一筋条141流道中的熔融塑胶液分流后并横向拐折进入第二筋条142的流道后汇合形成，由于第二筋条142介于相邻两个第一筋条141之间的部分较短，相邻两个第一筋条141流道中的熔融塑胶液分流后在第二筋条142的流道中可以快速汇合，从而避免熔融塑胶液流速下降，在汇合处形成熔接痕，降低第二筋条142的结构强度，进而降低防爆栅栏14的结构强度。第一子筋条1411连接通槽12的第三槽侧壁和第四槽侧壁，通过凸块13上的注塑部19所在位置注入熔融塑胶液，熔融塑胶液可以直接从模具内对应第一子筋条1411的流道沿下塑胶10宽度方向(Y轴方向)流动。第一子筋条1411的长度尺寸接近下塑胶10的宽度尺寸，通过使熔融塑胶液的流动方向与第一子筋条1411的流动方向相同，可以避免第一子筋条1411流道中的熔融塑胶液液延不均匀产生熔接痕，进而避免熔接痕降低第一子筋条1411的强度。
请参阅图8a和图8b，图8a为图6所示下塑胶的第三角度结构示意图，其中展示了所有顶针部。图8b为图6所示下塑胶的第三角度结构示意图，其中忽略了第一顶针部。本实施例中，下塑胶10设有多个第一顶针部S1、多个第二顶针部S2和多个第三顶针部S3。多个第一顶针部S1相对中轴线A对称，多个第二顶针部S2相对中轴线A对称，多个第三顶针部S3相对中轴线A对称。多个顶针部是下塑胶10在模具内成型后顶针(图未示)抵接的位置，以将已成型的下塑胶推出模具以脱模。其中，中轴线A为沿下塑胶10长度方向(X轴方向)延伸且位于下塑胶10宽度方向(Y轴方向)的中部的直线，中轴线A是为表述方便而设定的虚拟的线，并非下塑胶10上实际存在的线。
需要说明的是，本申请实施例中，顶针部是下塑胶10的最终产品结构，是由顶针对下塑 胶本体11的第一表面111施加顶出力而形成。当顶针还未对下塑胶10接触时，即还未进行脱模操作时，下塑胶10可并未形成有顶针部。当然，在一些实施例中，也可在未进行脱模时设置有顶针部的结构，即顶针还未与下塑胶10接触时，下塑胶10上即形成有顶针部的结构。
请继续参阅图8a，多个第一顶针部S1位于下塑胶本体11的第一表面111。多个第一顶针部S1分为多组，可以称为第一顶针部组。每个第一顶针部组中具有一个或者两个第一顶针部S1。当第一顶针部组只具有一个第一顶针部S1时，唯一的一个第一顶针部S1位于中轴线A上；当第一顶针部组具有两个第一顶针部S1时，两个第一顶针部S1在下塑胶10宽度方向(Y轴方向)正对且相对中轴线A两两对称。多个第一顶针部组之间在下塑胶10长度方向(X轴方向)间隔排布。相当于，中轴线A上具有第一顶针部S1，中轴线A上的第一顶针部S1相对中轴线A对称；沿下塑胶10宽度方向，中轴线A两侧也具有第一顶针部S1，中轴线A两侧的第一顶针部S1相对中轴线A两两对称。沿下塑胶10长度方向，中轴线A上的第一顶针部S1和中轴线A两侧的第一顶针部S1间隔排布。需要说明的是，正对是指两者的中心点的连线与对应的方向平行，如在下塑胶10宽度方向(Y轴方向)上正对，则该两个第一顶针部S1的中心的连线与下塑胶10宽度方向(Y轴方向)平行，如在下塑胶10长度方向(X轴方向)上正对，则该两个第一顶针部S1的中心的连线与下塑胶10长度方向(X轴方向)平行，后文中的正对同此限定，后续不再赘述。
具体的，本实施例中，多个第一顶针部S1分为八个第一顶针部组。第一组S1.1中的第一顶针部S1靠近第一极柱通孔113并与第一极柱通孔113在下塑胶10宽度方向(Y轴方向)上间隔设置。第二组S1.2中的第一顶针部S1位于中轴线A上并位于第一极柱通孔113背向第一凹槽17的一侧。第三组S1.3的第一顶针部S1靠近中轴线A并位于第一壁1211的侧边。第四组S1.4中的第一顶针部S1靠近下塑胶本体11的边缘并位于第三壁1221的侧边。第五组S1.5的第一顶针部S1靠近下塑胶本体11的边缘并位于第四壁1222的侧边。第六组S1.6中的第一顶针部S1靠近中轴线A并位于第二壁1212的侧边。第七组S1.7中的第一顶针部S1位于中轴线A上并位于第二极柱通孔115背向第二凹槽18的一侧。第八组S1.8中的第一顶针部S1靠近第二极柱通孔115并与第二极柱通孔115在下塑胶10宽度方向(Y轴方向)上间隔设置。
上述八个第一顶针部组中的第一顶针部S1沿下塑胶10长度方向(X轴方向)间隔排列，其中，第一组S1.1中的第一顶针部S1与第八组S1.8中的第一顶针部S1在下塑胶10长度方向(X轴方向)上正对；第二组S1.2中的第一顶针部S1与第七组S1.7中的第一顶针部S1在下塑胶10长度方向(X轴方向)上正对；第三组S1.3中的第一顶针部S1与第六组S1.6中的第一顶针部S1在下塑胶10长度方向(X轴方向)上正对；第四组S1.4中的第一顶针部S1与第五组S1.5中的第一顶针部S1在下塑胶10长度方向(X轴方向)上正对。每组中的第一顶针部S1均相对中轴线A对称，多个第一顶针部S1均匀分布，使得顶针与第一表面111上多个第一顶针部S1所在位置接触时，能够施加给下塑胶10的第一表面111均匀的顶出力，从而提升下塑胶10脱模的均匀性，进一步提升下塑胶10的产出良率。在其他实施例中，多组第一顶针部S1在下塑胶10长度方向(X轴方向)上也可以不具有正对关系。
在使用顶针对下塑胶10进行顶出操作时，多个顶针同步与下塑胶本体11的第一表面111上多个第一顶针部S1所在位置接触，并同步移动，使得第一表面111同时受到顶针的顶出力作用，力较为均匀，能够避免顶出的力不均匀导致下塑胶10变形的问题，有利于提升下塑胶10脱模的均匀性，进一步提升下塑胶10的注塑良率。
请参阅图9，图9为图6所示下塑胶的局部截面结构图。第一顶针部S1的形状呈火山口 形，中部相对第一表面111下凹，且边缘凸出于第一表面111。第一顶针部S1包括抵推面S11，抵推面S11为第一顶针部S1的中部向第一表面111内凹陷形成的表面，沿下塑胶10厚度方向(Z轴方向)，抵推面S11朝向第一表面111。抵推面S11的形状为圆形。具体的，在注塑脱模过程中，塑胶还未冷却到室温时，顶针与第一表面111接触并施加顶出力时，顶针的压力作用于第一表面111，会将塑胶顶出凹陷，而顶针外侧的塑胶受到凹陷的部分的塑胶的挤压，会从顶针的外周翘起，如此，便形成了火山口形状的第一顶针部S1。可以理解，顶针与第一表面111接触并施加顶出力时，顶针与抵推面S11接触。第二顶针部S2和第三顶针部S3的形状与第一顶针部S1的类似，也为火山口形，第二顶针部S2和第三顶针部S3的抵推面也为圆形，在后文中不再赘述。
本申请实施例中，第一顶针部S1的火山口形相对第一表面111为微微下凹，其下凹的深度相比于下塑胶本体11的厚度(下塑胶本体11在Z轴方向上的尺寸)而言可忽略不计，具体下凹深度不做限制，火山口形的边缘相对第一表面111也为微微凸起，其凸起的高度相比于下塑胶本体11的厚度而言可忽略不计，具体凸起的高度也不做限制。如此，第一顶针部S1的设置对下塑胶本体11的结构强度并未产生不良影响，也不会影响下塑胶10的功能。
请继续参阅图8a和图8b，本实施例中，多个第二顶针部S2位于第一凹槽17的第一底壁171和第二凹槽18的第二底壁181。
多个第二顶针部S2分为多组，可以称为第二顶针部组。每个第二顶针部组中具有两个第二顶针部S2，且两个第二顶针部S2在下塑胶10宽度方向(Y轴方向)正对且相对中轴线A两两对称。第二顶针部S2的抵推面为圆形，第二顶针部S2的抵推面的半径小于第一顶针部S1的抵推面的半径。本实施例中，第二顶针部S2的半径范围为1.5mm-3.0mm。
每个第一导流槽175中均具有一个第二顶针部S2。沿下塑胶10宽度方向(Y轴方向)，位于外侧的两个第一导流槽175中的第二顶针部S2分别靠近第一凹槽17的两个端壁，位于中间的两个第一导流槽175中的第二顶针部S2分别位于中轴线A相对两侧，且相邻设置，四个第一导流槽175中的第二顶针部S2均靠近所述第一凹槽17的侧壁，且沿着第一凹槽17长度方向间隔排列。具体的，本实施例中，每个第一导流槽175中的第二顶针部S2均靠近第一侧壁172。每个第一导流槽175中的第二顶针部S2均位于顶角位置。每个第二导流槽185中均具有一个第二顶针部S2。沿下塑胶10宽度方向，位于外侧的两个第二导流槽185中的第二顶针部S2分别靠近第二凹槽18的两个端壁，位于中间的两个所述第二导流槽185中的第二顶针部S2分别位于中轴线A相对两侧，且相邻设置，四个第二导流槽185中的第二顶针部S2均靠近第二凹槽18的侧壁，且沿着第二凹槽18长度方向间隔排列。具体的，本实施例中，每个第二导流槽185中的第二顶针部S2均靠近第三侧壁182。每个第二导流槽185中的第二顶针部S2均位于顶角位置。
本实施例中，第一凸起15和第二凸起16注塑成型的模具为金属凸块，金属凸块内设置驱动结构以驱动顶针推出，因此，金属凸块需要占据一定空间。通过使每个第二顶针部S2的抵推面的面积小于每个第一顶针部S1的抵推面S11的面积，且使第一导流槽175内的第二顶针部S2位于第一导流槽175的顶角位置，第二导流槽185内的第二顶针部S2位于第二导流槽185的顶角位置，可以给第二顶针驱动结构让位；同时使下塑胶10注塑成型的模具组件可以设计得更小，使一次注塑成型的下塑胶10的数量更多。
具体的，本实施例中，多个第二顶针部S2分为四个第二顶针部组。沿下塑胶10宽度方向(Y轴方向)，第一组S2.1中的第二顶针部S2位于下塑胶10外侧的第一导流槽175内，且位于第一凹槽17的端壁和第一侧壁172的连接处，即第一组S2.1中的第二顶针部S2靠近 第一凹槽17的端壁。沿下塑胶10长度方向(Y轴方向)，第一组S2.1中的第二顶针部S2靠近第一侧壁172。沿下塑胶10宽度方向(Y轴方向)，第二组S2.2中的第二顶针部S2位于下塑胶10中间的第一导流槽175内，且靠近中轴线A；沿下塑胶10长度方向(Y轴方向)，第二组S2.2中的第二顶针部S2靠近第一侧壁172。沿下塑胶10宽度方向(Y轴方向)，第三组S2.3中的第二顶针部S2位于下塑胶10外侧的第二导流槽185内，且位于第二凹槽18的端壁和第三侧壁182的连接处。沿下塑胶10宽度方向(Y轴方向)，第四组S2.4中的第二顶针部S2位于下塑胶10中间的第二导流槽185内，且靠近中轴线A；沿下塑胶10长度方向(Y轴方向)，第四组S2.4中的第二顶针部S2靠近第三侧壁182。
本实施例中，第一组S2.1中的第二顶针部S2与第三组S2.3中的第二顶针部S2在下塑胶10长度方向(X轴方向)上正对；第二组S2.2中的第二顶针部S2与第四组S2.4中的第二顶针部S2在下塑胶10长度方向(X轴方向)上正对。每组中的第二顶针部S2均相对中轴线A两两对称，多个第二顶针部S2均匀分布，使得顶针在与第一底壁171和第二底壁181上多个第二顶针部S2所在位置接触时，能够施加给下塑胶10的第一底壁171和第二底壁181均匀的顶出力，从而提升下塑胶10的第一凸起15和第二凸起16脱模的均匀性，进一步提升下塑胶10的产出良率。在其他实施例中，多组第二顶针部S2在下塑胶10长度方向(X轴方向)上也可以不具有正对关系。
每个第一导流槽175内的第二顶针部S2均位于第一导流槽175的顶角位置，且第二顶针部S2与第一导流槽175的任意一个槽壁之间的距离大于或等于0.55mm。每个第二导流槽185内的第二顶针部S2均位于第二导流槽185的顶角位置，且第二顶针部S2与第二导流槽185的任意一个侧壁之间的距离大于或等于0.55mm；避免使用顶针脱模时，顶针过于靠近第一导流槽175和第二导流槽185的槽壁，顶针对槽壁成型的流道造成干涉。
当通过顶针使下塑胶10脱模时，顶针同时与下塑胶10的第一表面111上多个第一顶针部S1所在位置以及第一底壁171、第二底壁181上多个第二顶针部S2所在位置抵接，有利于同时对下塑胶本体11、第一凸起15和第二凸起16进行脱模，提升下塑胶10脱模的均匀性，进一步提升下塑胶10的脱模良率。第一顶针部S1的抵推面S11的半径大于第二顶针部S2的抵推面的半径，与下塑胶本体11的第一表面111接触的顶针的端部面积较大，从而增加顶针与第一表面111的接触面积，提升脱模均匀性。
如图8a和图8b，本实施例中，多个第三顶针部S3位于防爆栅栏14上，且位于第一筋条141和第二筋条142的交叉连接处。
多个第三顶针部S3分为多组，可以称为第三顶针部组。每个第三顶针部组中具有两个第三顶针部S3，且两个第三顶针部S3在下塑胶10宽度方向(Y轴方向)正对且相对中轴线A两两对称。第三顶针部S3的抵推面为圆形，第三顶针部S3的抵推面的半径小于第一顶针部S1的抵推面S11的半径。
具体的，本实施例中，多个第三顶针部S3分为三个第三顶针部组。第一组S3.1中的第三顶针部S3位于第二子筋条1412与第二筋条142的交叉连接处。第二组S3.2中的第三顶针部S3位于第二子槽122内，且位于第一子筋条1411上。第三组S3.3中的第三顶针部S3位于第三子筋条1413与第二筋条142的交叉连接处。沿下塑胶10宽度方向(Y轴方向)，在中轴线A一侧的三个第三顶针部S3构成三角形，三个第三顶针部S3可以起到使防爆栅栏14均匀脱模的作用。
请结合参阅图5、图6和图10，图10为图4所示端盖和下塑胶的装配结构示意图。下塑胶10层叠设于端盖40，下塑胶10的第一表面111与端盖40的背面412相对并贴合。沿端 盖40厚度方向(Z轴方向)，下塑胶10的第一极柱通孔113与端盖40的第一通孔44同轴设置并相互连通。下塑胶10的注液通孔114与端盖40的注液孔46同轴设置并相互连通，下塑胶10的防爆栅栏14与端盖40的防爆阀42相对设置。沿端盖组件100厚度方向(Z轴方向)，防爆阀42的正投影落入第一子槽121的正投影内。沿下塑胶10厚度方向(Z轴方向)，第一子槽121的横截面面积大于两个第二子槽122的横截面面积，有助于电极组件200中产生的气体流通至防爆阀42，以便于防爆阀42开阀。通过在第一子槽121的两侧分别设置两个第二子槽122，可以增大通槽12的面积，增加压力气体通向防爆阀42的流通面积。储能装置1000在运输过程中，极耳或蓝膜易破裂产生碎片，防爆栅栏14可以避免极耳或蓝膜的碎片漂浮至防爆阀42的下方，遮挡过气通道，进而引起防爆失效，又可以防止极耳直接接触防爆阀42引起短路。
绝缘膜的侧边与端盖组件100粘接，具体的，绝缘膜的侧边与下塑胶10的凸块13沿下塑胶10宽度方向(Y轴方向)的相对两侧热熔粘接；凸块13的设置便于绝缘膜与下塑胶10固定连接，保证电极组件200与端盖40之间的绝缘。受电极组件200自身的重力影响，绝缘膜会向靠近电极组件200的方向拉扯下塑胶10的凸块13，以使下塑胶10的中间部分弯曲变形，从而在下塑胶10的两个第二子槽122与端盖40之间形成走气通道，使从电极组件200中到达第二子槽122的气体，能够经过走气通道到达端盖40的防爆阀42，有助于电极组件200中的气体到达防爆阀42。
以上对本申请实施例进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (19)

  1. 一种下塑胶，用于储能装置，其中，所述下塑胶包括下塑胶本体，所述下塑胶本体包括第一表面和第二表面，所述第一表面和所述第二表面沿所述下塑胶厚度方向背向设置；
    所述下塑胶本体上设有凸块、第一凸起和第二凸起，所述凸块、所述第一凸起和所述第二凸起均凸设于所述第二表面，沿所述下塑胶长度方向，所述第一凸起和所述第二凸起分别位于所述下塑胶本体的相对两端，且所述第一凸起和所述第二凸起均沿着所述下塑胶宽度方向延伸，所述凸块位于所述第一凸起和所述第二凸起之间，且与所述第一凸起、所述第二凸起间隔设置，所述凸块沿着所述下塑胶宽度方向延伸；
    所述凸块包括第一侧面，所述第一凸起包括第三侧面，所述第二凸起包括第五侧面，所述第一侧面、所述第三侧面、所述第五侧面位于所述下塑胶宽度方向的同一侧，所述第一侧面、所述第三侧面和所述第五侧面均具有一个注塑部。
  2. 根据权利要求1所述的下塑胶，其中，所述下塑胶设有通槽，所述通槽包括凸出所述第二表面的槽侧壁；
    所述下塑胶还设有防爆栅栏，所述防爆栅栏设于所述通槽内且与所述槽侧壁背向所述第一表面的端部连接，所述防爆栅栏包括数个第一筋条和数个第二筋条，数个所述第一筋条沿所述下塑胶宽度方向延伸且连接所述通槽的槽侧壁，数个所述第二筋条沿所述下塑胶长度方向延伸且连接所述通槽的槽侧壁，数个所述第一筋条与数个所述第二筋条交叉连接。
  3. 根据权利要求2所述的下塑胶，其中，所述第一表面具有多个第一顶针部，多个所述第一顶针部相对中轴线对称，所述中轴线为沿所述下塑胶长度方向延伸且位于所述下塑胶宽度方向的中部的直线。
  4. 根据权利要求3所述的下塑胶，其中，沿所述下塑胶宽度方向，多个所述第一顶针部位于所述中轴线相对两侧，多个所述第一顶针部相对所述中轴线两两对称。
  5. 根据权利要求3所述的下塑胶，其中，所述中轴线上具有所述第一顶针部，所述中轴线上的所述第一顶针部相对所述中轴线对称。
  6. 根据权利要求3所述的下塑胶，其中，所述下塑胶设有第一凹槽，所述第一凹槽自所述第一表面向所述第一凸起内凹陷形成，所述第一凹槽包括第一底壁和沿所述下塑胶长度方向相对设置的第一侧壁和第二侧壁；
    所述下塑胶设有第二凹槽，所述第二凹槽自所述第一表面向所述第二凸起内凹陷形成，所述第二凹槽包括第二底壁和沿所述下塑胶长度方向相对设置的第三侧壁和第四侧壁；
    所述第一底壁和所述第二底壁设有多个第二顶针部，多个所述第二顶针部相对所述中轴线两两对称。
  7. 根据权利要求6所述的下塑胶，其中，所述第一凹槽内具有数个第一导流槽，数个所述第一导流槽沿所述下塑胶宽度方向依次排列，数个所述第一导流槽的体积相等，沿所述下塑胶宽度方向，每个所述第一导流槽的长度尺寸为12.00mm-16.00mm，沿所述下塑胶长度方 向，每个所述第一导流槽的宽度尺寸为7.00mm-11.00mm；
    所述第二凹槽内具有数个第二导流槽，数个所述第二导流槽沿所述下塑胶宽度方向依次排列，数个所述第二导流槽的体积相等，沿所述下塑胶宽度方向，每个所述第二导流槽的长度尺寸为12.00mm-14.00mm，沿所述下塑胶长度方向，每个所述第二导流槽的宽度尺寸为7.00mm-11.00mm。
  8. 根据权利要求6所述的下塑胶，其中，每个所述第一顶针部的抵推面为圆形，每个所述第二顶针部的抵推面为圆形，每个所述第一顶针部的抵推面的半径大于每个所述第二顶针部的抵推面的半径。
  9. 根据权利要求8所述的下塑胶，其中，所述第二顶针部的抵推面的半径范围为1.5mm-3.0mm。
  10. 根据权利要求7所述的下塑胶，其中，所述第一凹槽包括沿所述下塑胶宽度方向相对设置的两个端壁，所述第一导流槽的数量为四个，每个所述第一导流槽中具有一个所述第二顶针部，沿所述下塑胶宽度方向，位于外侧的两个所述第一导流槽中的所述第二顶针部分别靠近所述第一凹槽的两个所述端壁，位于中间的两个所述第一导流槽中的所述第二顶针部分别位于所述中轴线相对两侧，且相邻设置，四个所述第一导流槽中的所述第二顶针部均靠近所述第一凹槽的侧壁，且沿着所述第一凹槽长度方向间隔排列。
  11. 根据权利要求10所述的下塑胶，其中，每个所述第一导流槽内的所述第二顶针部与所述第一导流槽的任意一个槽壁之间的距离大于或等于0.55mm。
  12. 根据权利要求7所述的下塑胶，其中，所述第二凹槽包括沿所述下塑胶宽度方向相对设置的两个端壁，所述第二导流槽的数量为四个，每个所述第二导流槽中具有一个所述第二顶针部，沿所述下塑胶宽度方向，位于外侧的两个所述第二导流槽中的所述第二顶针部分别靠近所述第二凹槽的两个所述端壁，位于中间的两个所述第二导流槽中的所述第二顶针部分别位于所述中轴线相对两侧，且相邻设置，四个所述第二导流槽中的所述第二顶针部均靠近所述第二凹槽的侧壁，且沿着所述第二凹槽长度方向间隔排列。
  13. 根据权利要求12所述的下塑胶，其中，每个所述第二导流槽内的所述第二顶针部与所述第二导流槽的任意一个槽壁之间的距离大于或等于0.55mm。
  14. 根据权利要求3所述的下塑胶，其中，数个所述第一筋条和数个所述第二筋条的交叉连接处具有多个第三顶针部，多个所述第三顶针部相对所述中轴线两两对称。
  15. 根据权利要求14所述的下塑胶，其中，多个所述第三顶针部的抵推面为圆形，每个所述第一顶针部的抵推面的半径大于每个所述第三顶针部的抵推面的半径。
  16. 根据权利要求2所述的下塑胶，其中，所述通槽包括第一子槽和两个第二子槽，沿所述下塑胶宽度方向，两个所述第二子槽分别位于所述第一子槽的相对两侧，且两个第二子槽 分别与所述第一子槽相互连通；
    沿所述下塑胶长度方向，所述第一子槽的宽度尺寸大于每个所述第二子槽的宽度尺寸。
  17. 一种端盖组件，其中，包括端盖和如权利要求1-16任一项所述的下塑胶，所述端盖设有防爆阀；
    所述下塑胶设有通槽，所述通槽包括第一子槽和两个第二子槽，沿所述下塑胶宽度方向，两个所述第二子槽分别位于所述第一子槽的相对两侧，且两个第二子槽分别与所述第一子槽相互连通；
    所述下塑胶装于所述端盖的表面，且所述下塑胶的第一表面朝向所述端盖，沿所述端盖组件厚度方向，所述防爆阀的正投影落入所述第一子槽的正投影内。
  18. 一种储能装置，其中，包括壳体、电极组件和如权利要求17所述的端盖组件，所述壳体具有开口，所述壳体设有容纳腔，所述电极组件容纳于所述容纳腔内，所述端盖组件覆盖所述开口。
  19. 一种用电设备，其中，包括如权利要求18所述的储能装置，所述储能装置用于储存电能。
PCT/CN2023/107085 2023-07-12 2023-07-12 下塑胶、端盖组件、储能装置及用电设备 Pending WO2025010682A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2023/107085 WO2025010682A1 (zh) 2023-07-12 2023-07-12 下塑胶、端盖组件、储能装置及用电设备
EP23944702.2A EP4734276A1 (en) 2023-07-12 2023-07-12 Lower plastic part, end cover assembly, energy storage apparatus, and electrical device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/107085 WO2025010682A1 (zh) 2023-07-12 2023-07-12 下塑胶、端盖组件、储能装置及用电设备

Publications (1)

Publication Number Publication Date
WO2025010682A1 true WO2025010682A1 (zh) 2025-01-16

Family

ID=94214424

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/107085 Pending WO2025010682A1 (zh) 2023-07-12 2023-07-12 下塑胶、端盖组件、储能装置及用电设备

Country Status (2)

Country Link
EP (1) EP4734276A1 (zh)
WO (1) WO2025010682A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022156090A1 (zh) * 2021-01-20 2022-07-28 江苏正力新能电池技术有限公司 一种动力电池顶盖结构及动力电池
CN115588817A (zh) * 2022-11-11 2023-01-10 深圳海润新能源科技有限公司 下塑胶件、顶盖组件、储能装置及用电设备
CN115863864A (zh) * 2023-02-09 2023-03-28 深圳海润新能源科技有限公司 下塑胶组件、储能装置及用电设备
CN115939692A (zh) * 2023-02-09 2023-04-07 深圳海润新能源科技有限公司 下塑胶组件、端盖组件、储能装置及用电设备
CN116404321A (zh) * 2023-05-31 2023-07-07 深圳海辰储能控制技术有限公司 下塑胶、端盖组件、储能装置及用电设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022156090A1 (zh) * 2021-01-20 2022-07-28 江苏正力新能电池技术有限公司 一种动力电池顶盖结构及动力电池
CN115588817A (zh) * 2022-11-11 2023-01-10 深圳海润新能源科技有限公司 下塑胶件、顶盖组件、储能装置及用电设备
CN115863864A (zh) * 2023-02-09 2023-03-28 深圳海润新能源科技有限公司 下塑胶组件、储能装置及用电设备
CN115939692A (zh) * 2023-02-09 2023-04-07 深圳海润新能源科技有限公司 下塑胶组件、端盖组件、储能装置及用电设备
CN116404321A (zh) * 2023-05-31 2023-07-07 深圳海辰储能控制技术有限公司 下塑胶、端盖组件、储能装置及用电设备

Also Published As

Publication number Publication date
EP4734276A1 (en) 2026-04-29

Similar Documents

Publication Publication Date Title
CN116565480B (zh) 下塑胶、端盖组件、储能装置及用电设备
CN116365123B (zh) 下塑胶、端盖组件、储能装置和用电设备
EP4535522A1 (en) Lower plastic part, end cover assembly, energy storage device and electrical equipment
CN116581495B (zh) 绝缘件、端盖组件、储能装置和用电设备
CN116365122B (zh) 下塑胶、端盖组件、储能装置和用电设备
CN116387711B (zh) 下塑胶、端盖组件、储能装置和用电设备
CN116470197B (zh) 端盖组件、储能装置及用电设备
CN116780067B (zh) 储能装置及用电设备
CN116404321B (zh) 下塑胶、端盖组件、储能装置及用电设备
US12374742B1 (en) Lower plastic member, end cover assembly, energy storage apparatus, and power consuming device
CN116799447B (zh) 下塑胶、端盖组件、储能装置和用电设备
CN116799385A (zh) 端盖组件、储能装置和用电设备
CN116742229B (zh) 储能装置及用电设备
WO2025010682A1 (zh) 下塑胶、端盖组件、储能装置及用电设备
WO2024243939A1 (zh) 下塑胶、端盖组件、储能装置及用电设备
CN116780127A (zh) 下塑胶、端盖组件、储能装置及用电设备
CN119786905A (zh) 绝缘件、端盖组件、储能装置及用电设备
CN116799391A (zh) 下塑胶、储能装置及用电设备
EP4734275A1 (en) End cap assembly, energy storage apparatus and electric device
CN116454492B (zh) 下塑胶、端盖组件、储能装置及用电设备
WO2024243937A1 (zh) 下塑胶、端盖组件、储能装置和用电设备
WO2025010679A1 (zh) 绝缘件、端盖组件、储能装置和用电设备
WO2024243930A1 (zh) 下塑胶、端盖组件、储能装置和用电设备
WO2024243943A1 (zh) 下塑胶、端盖组件、储能装置及用电设备
CN221978159U (zh) 储能装置和用电设备

Legal Events

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

Ref document number: 23944702

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2023944702

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2023944702

Country of ref document: EP

Effective date: 20260122

WWE Wipo information: entry into national phase

Ref document number: 202647015533

Country of ref document: IN

NENP Non-entry into the national phase

Ref country code: DE