WO2025010674A1 - 下塑胶、端盖组件、储能装置及储能系统 - Google Patents

下塑胶、端盖组件、储能装置及储能系统 Download PDF

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Publication number
WO2025010674A1
WO2025010674A1 PCT/CN2023/107074 CN2023107074W WO2025010674A1 WO 2025010674 A1 WO2025010674 A1 WO 2025010674A1 CN 2023107074 W CN2023107074 W CN 2023107074W WO 2025010674 A1 WO2025010674 A1 WO 2025010674A1
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WO
WIPO (PCT)
Prior art keywords
lower plastic
connecting rib
push
vent
push point
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/CN2023/107074
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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 EP23944694.1A priority Critical patent/EP4734247A1/en
Priority to PCT/CN2023/107074 priority patent/WO2025010674A1/zh
Publication of WO2025010674A1 publication Critical patent/WO2025010674A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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 energy storage system.
  • the thickness of the battery end cap assembly is an important parameter that affects the battery's energy density per unit volume. If the end cap assembly is too thick, the battery's energy density per unit volume will be reduced.
  • the current end cap assembly includes a lower plastic for insulation between the top cap and the pole. In order to increase the battery's energy density per unit volume, the lower plastic is usually designed to be very thin.
  • the lower plastic During injection molding, the lower plastic usually needs to be completely cooled before demolding, which results in low production efficiency.
  • the ventilation plate of the lower plastic In order to improve production efficiency, when demolding the lower plastic that has not been completely cooled, the ventilation plate of the lower plastic is prone to warping, deformation, and die pulling, resulting in a low yield rate.
  • the technical problem to be solved by the present application is to provide a lower plastic, end cover assembly, energy storage device and energy storage system that are not prone to warping, deformation, die pulling and the like during demolding.
  • the present application provides a lower plastic, which includes:
  • the main body comprises a first surface and a second surface which are arranged opposite to each other along a first direction;
  • the vent portion comprises a vent plate, a first connecting rib, a second connecting rib and a connecting edge, the connecting edge is spaced from the main body along the second direction, the vent plate is located between the main body and the connecting edge along the second direction, the vent plate comprises a third surface and a fourth surface arranged opposite to each other along the first direction, the fourth surface is located on the side of the second surface opposite to the first surface along the first direction; the vent plate comprises vent holes penetrating the third surface and the fourth surface; the first connecting rib and the second connecting rib are arranged opposite to each other along the third direction, the two ends of the first connecting rib are respectively connected to the main body and the vent portion; the two ends of the second connecting rib are respectively connected to the main body and the vent portion; the first connecting rib and the second connecting rib are connected to the third surface along the first direction; the positions where the first connecting rib and the second connecting rib are connected to the third surface do not overlap with the vent holes;
  • the fourth surface is provided with a first push point at a position facing away from the third surface and connected to the first connecting rib; the fourth surface is provided with a second push point at a position facing away from the third surface and connected to the second connecting rib.
  • the vent is used to correspond to the explosion-proof valve, and can provide a gathering space for the explosion-proof valve when it is opened.
  • the vent can make the gas flow and gather under the explosion-proof valve.
  • the fourth surface is located along the first direction on the side of the second surface facing away from the first surface. If the thickness of the vent plate is controlled to remain unchanged, the vent will have a larger space for the explosion-proof valve to gather gas. Since the fourth surface is located along the first direction on the side of the second surface facing away from the first surface, the vent plate is more likely to be pulled and deformed during demolding.
  • the fourth surface is provided with a first push point and a second push point. When the lower plastic is demolded, the first push point and the second push point are used to contact the ejector pin in the mold respectively.
  • the lower plastic When the ejector pin in the mold is active, the lower plastic can be ejected to demold the lower plastic.
  • the first push point is arranged at the position of the fourth surface facing away from the third surface and connected to the first connecting rib.
  • the first connecting rib can improve the structural strength of the first push point.
  • the depression of the first push point can be reduced, the probability of mold pulling can be reduced, and the yield rate of the lower plastic can be improved.
  • the second push point is arranged at the position of the fourth surface facing away from the third surface and connected to the second connecting rib.
  • the second connecting rib can improve the structural strength of the second push point.
  • the structural strength is improved.
  • the depression degree of the second push point can be reduced, the probability of die pulling can be reduced, and the yield rate of the lower plastic can be improved.
  • No through holes are set in the area where the first connecting rib and the second connecting rib are connected to the ventilation plate, which can improve the structural strength of the connection between the first connecting rib, the second connecting rib and the ventilation plate, and thus improve the overall structural strength of the lower plastic.
  • the radius of the first pushing point is greater than the diameter of the third pushing point, and the radius of the second pushing point is greater than the radius of the third pushing point.
  • the first push point, the second push point and the third push point in the fourth surface are respectively in contact with the ejector pin of the mold.
  • the first push point, the second push point and the third push point are jointly subjected to force, which can demould the vent plate and improve the demoulding yield of the vent plate.
  • the first push point is arranged at the position of the fourth surface facing away from the third surface and connected to the first connecting rib;
  • the second push point is arranged at the position of the fourth surface facing away from the third surface and connected to the second connecting rib, and the positions where the first connecting rib and the second connecting rib are connected to the third surface do not overlap with the vent hole.
  • the position of the fourth surface facing away from the first connecting rib and connected to the third surface has a larger space to form a first push point with a larger radius
  • the position of the fourth surface facing away from the second connecting rib and connected to the third surface has a larger space to form a second push point with a larger radius.
  • the radius of the first push point and the second push point is larger
  • the contact area between the first push point and the second push point and the ejector pin in the mold is larger
  • the pressure between the first push point and the second push point and the ejector pin in the mold is smaller.
  • it can reduce the probability of warping or deformation caused by excessive force on the ventilation plate when the lower plastic is demolded.
  • it can demold the lower plastic in advance, and there is no need to wait until the lower plastic is completely cooled before performing the demolding action, thereby improving the production efficiency of the lower plastic.
  • the radius of the first pushing point and the second pushing point are both r1
  • the radius of the third pushing point is r2, and 1/3 ⁇ r2/r1 ⁇ 2/3.
  • the forces on various parts of the vent plate may be different.
  • the first push point, the second push point and the third push point do not overlap with the position of the vent hole.
  • the existence and arrangement of the vent hole will limit the radius of the first push point, the second push point and the third push point. If the value of r2/r1 is too small, taking r2 as a constant value will inevitably have a greater impact on the arrangement position of the vent hole, thereby affecting the ability of the vent plate to circulate gas. If the value of r2/r1 is too large, taking r2 as a constant value is not enough to balance the forces on various parts of the vent plate when the lower plastic is demoulded.
  • the vent plate includes a first end and a second end along the third direction, the plurality of third pushing points are divided into a first group, a second group and a third group, the second group has two or more third pushing points, the third pushing points in the first group are distributed between the first end and the first pushing point, the third pushing points in the second group are distributed between the first pushing point and the second pushing point, and the third pushing points in the third group are distributed between the second pushing point and the second end;
  • the distance between the third push point adjacent to the first push point in the first group and the first push point is d1
  • the distance between two adjacent third push points in the second group is d2
  • the distance between the third push point adjacent to the second push point in the third group and the second push point is d3, d2 ⁇ d1, d2 ⁇ d3.
  • the area between the two ends of the vent plate is susceptible to greater stress.
  • the more concentrated arrangement of the third push point between the first push point and the second push point can make the force on the vent plate more uniform when the lower plastic is demoulded, reduce the probability of mold pulling and deformation of the vent plate, and improve product yield.
  • 1/4 ⁇ d2/d1 ⁇ 3/4, 1/4 ⁇ d2/d3 ⁇ 3/4, can make the force of the ventilation plate more uniform when the lower plastic is demolded. If the ratio of d2/d1 is too small, the two ends of the ventilation plate are prone to warping when the lower plastic is demolded. If the ratio of d2/d1 is too large, the ventilation plate cannot be made to bear a more uniform force when the lower plastic is demolded, and the ventilation plate is prone to die pulling.
  • the first connecting rib, the second connecting rib, the main body, the connecting edge and the vent plate form a gas gathering space for the explosion-proof valve to gather gas
  • the first connecting rib has two ends.
  • the area between the two ends of the second connecting rib is arched in a direction away from the second connecting rib, and the area between the two ends of the second connecting rib is arched in a direction away from the first connecting rib;
  • the explosion-proof valve includes an explosion-proof piece and an explosion-proof hole arranged on the top cover, the outer periphery of the explosion-proof piece is welded to the inner wall of the explosion-proof hole to form a weld mark portion, the surface of the first connecting rib facing away from the ventilation plate and the surface of the second connecting rib facing away from the ventilation plate are in contact with the top cover, and the projection of the weld mark portion along the first direction is located in the gas gathering space.
  • the gas gathering space can provide gas for the explosion-proof valve to gather gas, and on the other hand, it can guide the gas, thereby allowing the gas in the energy storage device to be discharged from the opened explosion-proof valve to the outside of the energy storage device. Since the area between the two ends of the first connecting rib is arched in the direction away from the second connecting rib, and the area between the two ends of the second connecting rib is arched in the direction away from the first connecting rib, the gas gathering space can be increased, making it convenient for more gas in the energy storage device to be discharged from the opened explosion-proof valve to the outside of the energy storage device.
  • the first connecting rib and the second connecting rib are arranged outside the explosion-proof plate of the explosion-proof valve to prevent the wound electrode assembly from impacting the lower plastic when the battery accidentally falls, thereby causing the explosion-proof valve to open by mistake, thereby improving the safety performance of the battery.
  • the ventilation plate and the main body are spaced apart to form a first ventilation opening
  • the ventilation plate and the connecting edge are spaced apart to form a second ventilation opening
  • both the first ventilation opening and the second ventilation opening are connected to the air gathering space.
  • the first vent and the second vent facilitate the gas in the energy storage device to enter the gas gathering space and then be discharged from the gas gathering space to the outside of the energy storage device; the first vent and the second vent are located on both sides of the vent plate along the second direction, and the negative pressure generated by the first vent entering the gas gathering space can balance the negative pressure generated by the second vent entering the gas gathering space.
  • the force stability of the vent plate is improved, and the structural stability of the lower plastic is further improved.
  • the ventilation portion also includes a first reinforcement rib and a second reinforcement rib, wherein two ends of the first reinforcement rib are respectively connected to the main body and the connecting edge, and the first reinforcement rib is connected to the first end of the ventilation plate in an arc; two ends of the second reinforcement rib are respectively connected to the main body and the connecting edge, and the second reinforcement rib is connected to the second end of the ventilation plate in an arc, wherein the first connecting rib and the second connecting rib are located between the first reinforcement rib and the second reinforcement rib.
  • the first reinforcing rib and the second reinforcing rib can enhance the connection strength between the vent plate and the main body, and can also improve the structural strength of the vent portion, further improving the overall strength of the lower plastic. Avoid the vent plate from forming sharp portions at right angles along the third direction, and prevent the wound electrode assembly from impacting the lower plastic and being scratched by the sharp portions when the battery accidentally falls, causing an internal short circuit.
  • the main body also has a mounting boss, the mounting boss includes a fifth surface and a sixth surface arranged opposite to each other along the first direction, the fifth surface protrudes from the first surface, and the sixth surface is located between the first surface and the second surface along the first direction; the mounting boss is also provided with a mounting through hole passing through the fifth surface and the sixth surface.
  • the mounting boss is used to mount the pole, and the pole passes through the mounting through hole.
  • the fifth surface protrudes from the first surface, and the sixth surface is located between the first surface and the second surface along the first direction, so that the first surface and the fifth surface form a step, and the pole will not directly act on the first surface, reducing the possibility of deformation of the main body when the pole is installed in the mounting through hole.
  • the step formed by the second surface and the sixth surface can limit the position of the pole and improve the installation stability of the pole.
  • the main body includes a first side edge and a second side edge arranged opposite to each other along the third direction, and the main body also includes a third side edge connected to the first connecting rib and the second connecting rib, and the first side edge, the second side edge and the third side edge all protrude from the second surface.
  • the first side edge, the second side edge and the third side edge can improve the overall strength of the thin sheet-like main body in the second direction and the third direction.
  • the provision of the third side edge can improve the connection strength between the main body plate and the first connecting rib and the second connecting rib.
  • the distance between the first surface and the second surface along the first direction is h1
  • the size of the third side along the first direction is h2, and 1/3 ⁇ h1/h2 ⁇ 2/3.
  • the dimension of the third side along the first direction is larger than the dimension from the first surface to the second surface, so that the connection area between the main body and the first connecting rib and the second connecting rib is larger, and the connection strength between the first connecting rib, the second connecting rib and the third side can be improved. If the value of h1/h2 is too small, when the distance between the first surface and the second surface is a certain value, the dimension of the third side along the first direction will be too large, which will make the dimension of the third side along the first direction too large, resulting in too much space occupied by the lower plastic.
  • the lower plastic also includes a sinker, the sinker is connected to an end of the main body away from the ventilation portion, the sinker includes a seventh surface and an eighth surface arranged opposite to each other along the first direction, and the eighth surface protrudes from the second surface.
  • the sinker can improve the structural strength of the lower plastic.
  • the sinker and the first side, the second side and the third side form an installation space.
  • the components connected to the lower plastic in the end cover assembly can be connected to the lower plastic in the installation space, which can improve the structural compactness of the end cover assembly.
  • the sinker, the first side, the second side and the third side can have a limiting effect on the components installed in the installation space.
  • the seventh surface is provided with a plurality of grooves arranged along a third direction, and a through hole is provided at the bottom of each groove.
  • the sinker is provided with a groove to reduce the weight of the lower plastic, reduce the material required for molding the sinker, and reduce the cost.
  • the through hole can be used to circulate gas and release the pressure inside the energy storage device.
  • a plurality of fourth pushing points are provided on the second surface, and the plurality of fourth pushing points are symmetrically arranged with respect to the symmetry plane.
  • the fourth push point is used to make the lower plastic abut against the ejector pin in the mold when demolding.
  • the fourth push point is pushed to demold the lower plastic, reduce the possibility of mold pulling and deformation of the main body, and improve the production yield of the lower plastic.
  • the eighth surface is provided with a plurality of fifth pushing points, and the plurality of fifth pushing points are symmetrically arranged with respect to the symmetry plane.
  • the fifth push point is used to make the lower plastic come into contact with the ejector pin in the mold when demolding.
  • the fifth push point is pushed to demold the lower plastic, thereby reducing the possibility of die pulling and deformation of the sinker and improving the production yield of the lower plastic.
  • the lower plastic is symmetrical about the symmetry plane.
  • the overall uniformity of the lower plastic can be improved, the overall structural strength of the lower plastic can be improved, and the production yield of the lower plastic can be improved. It can be obtained that the first push point is symmetrical with the second push point, the plurality of third push points are symmetrically arranged, the plurality of fourth push points are symmetrically arranged, and the plurality of fifth push points are symmetrically arranged, so that the overall force of the lower plastic can be more uniform when demolding the lower plastic, and the possibility of the lower plastic being pulled and deformed can be reduced.
  • an end cap assembly comprising:
  • the plastic is lowered as described in the first aspect
  • a top cover which is arranged on the lower plastic
  • An explosion-proof valve is installed on the top cover and corresponds to the vent portion.
  • the present application discloses an energy storage device, which includes a battery cell assembly, a transition piece, and the end cover assembly described in the second aspect, wherein the transition piece connects the battery cell assembly and the end cover assembly.
  • the present application discloses an energy storage system, comprising a conversion device, a load and the energy storage device as described in the third aspect, wherein the conversion device is used to convert energy to output electrical energy, the conversion device is electrically connected to the energy storage device, and the energy storage device is electrically connected to the load.
  • FIG1 is a schematic diagram of the structure of an energy storage system provided in one embodiment of the present application.
  • FIG2 is a schematic diagram of the structure of an energy storage device provided in one embodiment of the present application.
  • FIG3 is a schematic structural diagram of an end cover assembly provided in one embodiment of the present application.
  • FIG4 is an exploded schematic diagram of FIG3 ;
  • FIG5 is a schematic diagram of the structure of an end cap assembly provided by an embodiment of the present application with the lower plastic omitted;
  • FIG6 is a schematic diagram of the three-dimensional structure of the lower plastic provided in one embodiment of the present application.
  • FIG7 is a schematic structural diagram of FIG6 from another perspective
  • FIG8 is a plan view of FIG7
  • FIG9 is a cross-sectional view taken along line A-A in FIG8 .
  • 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.
  • the present application 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:
  • the energy storage device provided in the embodiment of the present application is applied to an energy storage system, which includes a light energy conversion device (photovoltaic panel 2000), a wind energy conversion device (wind turbine 3000), a power grid 4000 and an energy storage device 1000.
  • the light energy conversion device and the wind energy conversion device belong to or are conversion devices.
  • the energy storage device 1000 is loaded in an energy storage cabinet and can be installed outdoors. Specifically, the photovoltaic panel 2000 can convert solar energy into electrical energy during the period of low electricity prices.
  • the energy storage device 1000 is used to store the electrical energy and supply it to the power grid 4000 during peak electricity consumption, or to supply power when the power grid 4000 is powered off/out of power.
  • the wind energy conversion device (wind turbine 3000) can convert wind energy into electrical energy.
  • the energy storage device 1000 is used to store the electrical energy and supply it to the power grid 4000 during peak electricity consumption, or to supply power when the power grid 4000 is powered off/out of power.
  • the transmission of electrical energy can be transmitted using high-voltage
  • the number of energy storage devices 1000 can be several, and several energy storage devices 1000 are connected in series or in parallel. Several energy storage devices 1000 are supported and electrically connected by isolation plates (not shown). In this embodiment, “several” refers to two or more. An energy storage box can also be provided outside the energy storage device 1000 to accommodate the energy storage device 1000.
  • 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 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.
  • the energy storage device 1000 includes a cell assembly 1100, an adapter, and an end cap assembly 1200.
  • the cell assembly 1100 is connected to the end cap assembly 1200 through the adapter.
  • the adapter is connected between the cell assembly 1100 and the end cap assembly 1200.
  • the cell assembly 1100 can output electrical energy, and the end cap assembly 1200 is used to be electrically connected to a load or a conversion device.
  • the present application also discloses an end cap assembly 1200, which includes a lower plastic 100, a top cover 200 and an explosion-proof valve 300.
  • the lower plastic 100 and the top cover 200 cooperate to locate the position of the pole 400.
  • the pole 400 is also electrically connected to the battery cell assembly 1100.
  • the lower plastic 100 has good insulation performance and can reduce the possibility of leakage of the pole 400.
  • the explosion-proof valve 300 is used to release the pressure inside the energy storage device 1000 when the inside of the energy storage device 1000 has a high pressure, thereby reducing the possibility of explosion of the energy storage device 1000 due to excessive internal pressure.
  • the length direction of the lower plastic 100 is defined as the X-axis direction
  • the width direction of the lower plastic 100 is defined as the Y-axis direction
  • the thickness direction of the lower plastic 100 is defined as the Z-axis direction.
  • the present application also discloses a lower plastic 100, which includes a main body 110, a vent 120 and a sink 130.
  • the thickness direction of the main body 110 is a first direction, and the first direction is the Z-axis direction.
  • the vent 120, the main body 110 and the sink 130 are sequentially connected along a second direction.
  • the second direction is the X-axis direction.
  • the lower plastic 100 is made of insulating material.
  • the lower plastic 100 can be formed by an injection molding process. It can be understood that the main body 110, the venting portion 120 and the sink 130 are all made of insulating materials.
  • the main body 110 includes a first surface 111 and a second surface 112 that are disposed opposite to each other along a first direction.
  • the main body 110 is substantially in a plate shape.
  • the main body 110 includes a first side 114 and a second side 115 that are arranged opposite to each other along a third direction, and the third direction is the Y-axis direction.
  • the main body 110 also includes a third side 116 connected to the first connecting rib 122 and the second connecting rib 123, and the two ends of the third side 116 are respectively connected to the first side 114 and the second side 115, and the first side 114, the second side 115 and the third side 116 all protrude from the second surface 112 along the Z-axis.
  • the first side 114, the second side 115 and the third side 116 can improve the overall strength of the main body 110, and the third side 116 can also improve the connection strength between the main plate and the first connecting rib 122 and the second connecting rib 123.
  • the sink 130, the first side 114, the second side 115 and the third side 116 form an installation space.
  • the components in the end cover assembly 1200 that are connected to the lower plastic 100 can be connected to the lower plastic 100 in the installation space, which can improve the structural compactness of the end cover assembly 1200.
  • the sink 130, the first side 114, the second side 115 and the third side 116 can have a limiting effect on the components installed in the installation space, which can improve the structural strength of the end cover assembly 1200.
  • the distance between the first surface 111 and the second surface 112 along the first direction is h1
  • the size of the third side 116 along the first direction is h2, 1/3 ⁇ h1/h2 ⁇ 2/3.
  • the distance from the first surface 111 to the second surface 112 along the first direction is the thickness of the middle area of the main body 110 surrounded by the sink 130, the first side 114, the second side 115 and the third side 116.
  • the size of the third side 116 along the first direction is greater than the size from the first surface 111 to the second surface 112, so that the connection area between the main body 110 and the first connecting rib 122 and the second connecting rib 123 is larger, thereby improving the connection strength between the first connecting rib 122, the second connecting rib 123 and the third side 116. If the value of h1/h2 is too small, when the distance between the first surface 111 and the second surface 112 is a certain value, the dimension of the third side 116 along the first direction will be too large, which will cause the dimension of the third side 116 along the first direction to be too large, resulting in too much space occupied by the lower plastic 100, which will reduce the energy density of the energy storage device 1000.
  • the ventilation portion 120 includes a ventilation plate 121, a first connecting rib 122, a second connecting rib 123 and a connecting edge 124, the connecting edge 124 is spaced apart from the main body 110 along the second direction, the ventilation plate 121 is located between the main body 110 and the connecting edge 124 along the second direction, the ventilation plate 121 includes a third surface 121a and a fourth surface 121b arranged opposite to each other along the first direction, the fourth surface 121b is located along the first direction on the side of the second surface 112 opposite to the first surface 111; the ventilation plate 121 includes a ventilation hole 121c passing through the third surface 121a and the fourth surface 121b; the first connecting rib 122 and the second connecting rib 123 are symmetrically arranged about a symmetry plane M, the symmetry plane M is located between the two ends of the ventilation plate 121 arranged opposite to each other along a third direction, and the third direction is the Y-axis direction.
  • the two ends of the first connecting rib 122 are connected to the main body 110 and the connecting edge 124 respectively; the two ends of the second connecting rib 123 are connected to the main body 110 and the connecting edge 124 respectively; the first connecting rib 122 and the second connecting rib 123 are connected to the third surface 121a along the first direction; the positions where the first connecting rib 122 and the second connecting rib 123 are connected to the third surface 121a do not overlap with the vent hole 121c.
  • the horizontal plane where the first surface 111 is located is higher than the horizontal plane where the second surface 112 is located
  • the horizontal plane where the third surface 121a is located is higher than the horizontal plane where the fourth surface 121b is located
  • the horizontal plane where the fourth surface 121b is located is lower than the horizontal plane where the second surface 112 is located.
  • the horizontal plane where the third surface 121a is located is lower than the horizontal plane where the second surface 112 is located. It can be understood that there may be a height difference between the third surface 121a and the second surface 112.
  • the first connecting rib 122, the second connecting rib 123, the main body 110, the connecting edge 124 and the vent plate 121 form a gas collecting space 125 for collecting gas in the explosion-proof valve 300.
  • the gas collecting space 125 allows gas to flow and gather under the explosion-proof valve.
  • the area between the two ends of the first connecting rib 122 is arched away from the second connecting rib 123.
  • the area is arched in a direction away from the first connecting rib 122.
  • the cross-sections of the first connecting rib 122 and the second connecting rib 123 are roughly arc-shaped.
  • the gas gathering space 125 can provide gas gathering for the explosion-proof valve 300 on the one hand, and can guide the gas on the other hand, so that the gas in the energy storage device 1000 is discharged from the opened explosion-proof valve 300 to the outside of the energy storage device 1000. Since the area between the two ends of the first connecting rib 122 is arched in a direction away from the second connecting rib 123, and the area between the two ends of the second connecting rib 123 is arched in a direction away from the first connecting rib 122, the gas gathering space 125 can be enlarged, which facilitates more gas in the energy storage device 1000 to be discharged from the opened explosion-proof valve 300 to the outside of the energy storage device 1000.
  • the explosion-proof valve 300 includes an explosion-proof piece 310 and an explosion-proof hole 320 provided on the top cover.
  • the outer periphery of the explosion-proof piece 310 is welded to the inner wall of the explosion-proof hole 320 to form a weld mark 330.
  • the surface of the first connecting rib 122 facing away from the vent plate 121 and the surface of the second connecting rib 123 facing away from the vent plate 121 abut against the top cover 200.
  • the projection of the weld mark 330 along the first direction is located in the gas gathering space 125.
  • the first connecting rib 122 and the second connecting rib 123 are provided outside the explosion-proof piece 310 of the explosion-proof valve, which can prevent the wound electrode assembly from impacting the lower plastic when the battery accidentally falls, causing the explosion-proof valve to be opened by mistake, thereby improving the safety performance of the battery.
  • the vent plate 121 and the main body 110 are spaced apart to form a first vent 126, and the vent plate 121 and the connecting edge 124 are spaced apart to form a second vent 127. Both the first vent 126 and the second vent 127 are connected to the gas gathering space 125.
  • the first vent 126 can be symmetrically arranged with the second vent 127, so that the ventilation volume of the first vent 126 and the ventilation flow rate of the second vent 127 can be substantially the same.
  • the first vent 126 and the second vent 127 can facilitate the gas in the energy storage device 1000 to enter the gas gathering space 125, and then be discharged from the gas gathering space 125 to the outside of the energy storage device 1000; the first vent 126 and the second vent 127 are located on both sides of the vent plate 121 along the second direction, and the negative pressure generated by the first vent 126 entering the gas gathering space 125 can balance the negative pressure generated by the second vent 127 entering the gas gathering space 125.
  • the force stability of the ventilation plate 121 is improved, and the structural stability of the lower plastic 100 is further improved.
  • the vent portion 120 further includes a first reinforcing rib 128 and a second reinforcing rib 129.
  • the two ends of the first reinforcing rib 128 are respectively connected to the main body 110 and the connecting edge 124, and the first reinforcing rib 128 is connected to the first end 121g of the vent plate 121 in an arc;
  • the two ends of the second reinforcing rib 129 are respectively connected to the main body 110 and the connecting edge 124, and the second reinforcing rib 129 is connected to the second end 121h of the vent plate 121 in an arc.
  • first connecting rib 122 and the second connecting rib 123 are located between the first reinforcing rib 128 and the second reinforcing rib 129.
  • the first reinforcing rib 128 and the second reinforcing rib 129 can enhance the connection strength between the vent plate 121 and the main body 110, and can also improve the structural strength of the vent portion 120, and further improve the overall strength of the lower plastic 100.
  • the fourth surface 121b is provided with a first push point 121d at a position facing away from the third surface 121a and connected to the first connecting rib 122 ; the fourth surface 121b is provided with a second push point 121e at a position facing away from the third surface 121a and connected to the second connecting rib 123 .
  • the vent 120 is used to correspond to the explosion-proof valve 300, and can provide a gas gathering space for the explosion-proof valve 300 when it is opened.
  • the vent 120 can make the gas flow and gather under the explosion-proof valve.
  • the fourth surface 121b is located along the first direction on the side of the second surface 112 facing away from the first surface 111. If the thickness of the vent plate 121 is controlled to remain unchanged, the vent 120 will have a larger space for the explosion-proof valve 300 to gather gas. Since the fourth surface 121b is located along the first direction on the side of the second surface 112 facing away from the first surface 111, the vent plate 121 is more likely to be pulled and deformed during demolding.
  • the fourth surface 121b is provided with a first push point 121d and a second push point 121e.
  • the first push point 121d and the second push point 121e are used to contact the ejector pin in the mold respectively.
  • the ejector pin in the mold is movable and can eject the lower plastic 100 to demold the lower plastic 100.
  • the first push point 121d is provided at a position of the fourth surface 121b that is opposite to the third surface 121a and connected to the first connecting rib 122.
  • the first connecting rib 122 can improve the structural strength of the first push point 121d.
  • the second push point 121e is disposed at a position of the fourth surface 121b facing away from the connection between the third surface 121a and the second connecting rib 123.
  • the second connecting rib 121e contacts and pushes the lower plastic 100 to be demolded, the second connecting rib 123 can improve the structural strength of the second pushing point 121e.
  • the depression of the second pushing point 121e can be reduced, the probability of mold pulling can be reduced, and the yield rate of the lower plastic 100 can be improved.
  • No through hole is set in the area where the first connecting rib 122 and the second connecting rib 123 are connected to the ventilation plate 121, which can improve the connection strength of the first connecting rib 122, the second connecting rib 123 and the ventilation plate 121, and further improve the overall structural strength of the lower plastic 100.
  • the fourth surface 121b is also provided with a plurality of third push points 121f, the radius of the first push point 121d is greater than the diameter of the third push point 121f, and the radius of the second push point 121e is greater than the radius of the third push point 121f.
  • the plurality of third push points 121f can be arranged along the Y-axis direction, and the plurality of push points are symmetrically arranged along the Y-direction.
  • the first push point 121d, the second push point 121e and the third push point 121f in the fourth surface 121b are respectively in contact with the ejector pin of the mold.
  • the first push point 121d, the second push point 121e and the third push point 121f are jointly subjected to force, so that the vent plate 121 can be demoulded, thereby improving the demoulding yield rate of the vent plate 121.
  • the first push point 121d is located at the position of the fourth surface 121b facing away from the third surface 121a and connected to the first connecting rib 122
  • the second push point 121e is located at the position of the fourth surface 121b facing away from the third surface 121a and connected to the second connecting rib 123
  • the positions where the first connecting rib 122 and the second connecting rib 123 are connected to the third surface 121a do not overlap with the vent hole 121c
  • the radius of the first push point 121d and the second push point 121e is larger, the contact area between the first push point 121d, the second push point 121e and the ejector pin in the mold is larger, and the pressure between the first push point 121d, the second push point 121e and the ejector pin in the mold is smaller, which can reduce the probability of warping or deformation of the lower plastic 100 due to excessive force on the vent plate 121 when demolding.
  • the lower plastic 100 can be demolded in advance, and there is no need to wait until the lower plastic 100 is completely cooled before demolding, thereby improving the production efficiency of the lower plastic 100.
  • the radius of the first push point 121d and the second push point 121e are both r1, and the radius of the third push point 121f is r2, 1/3 ⁇ r2/r1 ⁇ 2/3.
  • the forces on each part of the vent plate 121 may be different.
  • the probability of the vent plate 121 being warped or deformed due to excessive concentration of forces on the local part is reduced.
  • the first push point 121d, the second push point 121e and the third push point 121f do not overlap with the position of the vent hole 121c.
  • vent hole 121c The existence and arrangement of the vent hole 121c will limit the radius size of the first push point 121d, the second push point 121e and the third push point 121f. If the value of r2/r1 is too small, r2 is taken as a constant value, which will inevitably greatly affect the arrangement of the vent holes 121c and the ability of the vent plate 121 to circulate gas. If the value of r2/r1 is too large, r2 is taken as a constant value, which is insufficient to balance the forces on various parts of the vent plate 121 when the lower plastic 100 is demolded.
  • the vent plate 121 includes a first end 121g and a second end 121h along the third direction, and a plurality of third push points 121f are divided into a first group, a second group and a third group.
  • the second group has more than two third push points 121f.
  • the third push points 121f in the first group are distributed between the first end 121g and the first push point 121d
  • the third push points 121f in the second group are distributed between the first push point 121d and the second push point 121e
  • the third push points 121f in the third group are distributed between the second push point 121e and the second end 121h. It can be obtained that the third push points 121f in the second group are located at the center of the fourth surface 121b.
  • the third push points 121f in the second group are more concentratedly distributed at the center of the fourth surface 121b, so that the forces on each part of the vent plate 121 can be balanced when the lower plastic 100 is demolded.
  • the distance between the third push point 121f adjacent to the first push point 121d in the first group and the first push point 121d is d1
  • the distance between two adjacent third push points 121f in the second group is d2
  • the distance between the third push point 121f adjacent to the second push point 121e in the third group and the second push point 121e is d3, d2 ⁇ d1, d2 ⁇ d3.
  • the vent plate 121 When the lower plastic 100 is demolded, the area between the first end 121g and the second end 121h of the vent plate 121 is susceptible to greater stress, so that the third push point 121f between the first push point 121d and the second push point 121e is arranged more concentratedly, so that the force on the vent plate 121 is more uniform when the lower plastic 100 is demolded, and the vent plate 121 can be reduced. probability and improve product yield.
  • the main body 110 also has a mounting boss 113, which includes a fifth surface 113b and a sixth surface 113c arranged opposite to each other along the first direction, the fifth surface 113b protrudes from the first surface 111, and the sixth surface 113c is located between the first surface 111 and the second surface 112 along the first direction; the mounting boss 113 is also provided with a mounting through hole 113a that passes through the fifth surface 113b and the sixth surface 113c.
  • the mounting boss 113 is used to mount the pole 400, and the pole 400 passes through the mounting through hole 113a.
  • the fifth surface 113b protrudes from the first surface 111
  • the sixth surface 113c is located between the first surface 111 and the second surface 112 along the first direction, so that the first surface 111 and the fifth surface 113b form a step, and the pole 400 will not directly act on the first surface 111, reducing the possibility of deformation of the main body 110 when the pole 400 is installed in the mounting through hole 113a.
  • the step formed by the second surface 112 and the sixth surface 113c can limit the position of the pole 400 and improve the installation stability of the pole 400.
  • the sinking platform 130 is connected to one end of the main body 110 away from the vent 120 .
  • the sinking platform 130 includes a seventh surface 131 and an eighth surface 132 that are oppositely disposed along a first direction.
  • the eighth surface 132 protrudes from the second surface 112 .
  • the seventh surface 131 is provided with a plurality of grooves 133 arranged along the third direction, and a through hole 133a is provided at the bottom of each groove 133.
  • the grooves 133 provided on the sink 130 can reduce the weight of the lower plastic 100, reduce the material required for molding the sink 130, and reduce the cost.
  • the through hole 133a can be used for circulating gas.
  • the second surface 112 is provided with a plurality of fourth push points 112a, which are symmetrically arranged about the symmetry plane M.
  • the fourth push points 112a are used to make the lower plastic 100 abut against the ejector pins in the mold when demolding. When the ejector pins in the mold move, the fourth push points 112a are pushed, so that the lower plastic 100 can be demolded, the possibility of mold pulling and deformation of the main body 110 is reduced, and the production yield of the lower plastic 100 is improved.
  • the eighth surface 132 is provided with a plurality of fifth push points 132a, which are symmetrically arranged about the symmetry plane M.
  • the fifth push points 132a are used to make the lower plastic 100 abut against the ejector pins in the mold when demolding. When the ejector pins in the mold move, the fifth push points 132a are pushed, so that the lower plastic 100 can be demolded, the possibility of die pulling and deformation of the sink 130 is reduced, and the production yield of the lower plastic 100 is improved.
  • the lower plastic 100 is symmetrical about the symmetry plane M, and the symmetry plane M is perpendicular to the third direction.
  • the overall uniformity of the lower plastic 100 can be improved, the overall structural strength of the lower plastic 100 can be improved, and the production yield of the lower plastic 100 can be improved.
  • the first push point 121d is symmetrical with the second push point 121e
  • the plurality of third push points 121f are symmetrically arranged
  • the plurality of fourth push points 112a are symmetrically arranged
  • the plurality of fifth push points 132a are symmetrically arranged, which can make the overall force of the lower plastic 100 more uniform when demolding the lower plastic 100, and can reduce the possibility of die pulling and deformation of the lower plastic 100.
  • connection can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or mechanical connection.
  • Electrical connection can be direct connection or indirect connection through an intermediate medium, can be internal connection between two elements or interaction between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

一种下塑胶、端盖组件、储能装置及储能系统，下塑胶(100)包括主体部(110)和通气部(120)：通气部(120)包括通气板(121)、第一连接筋(122)、第二连接筋(123)和连接边(124)，通气板(121)包括相背设置的第三表面(121a)和第四表面(121b)，第一连接筋(122)、第二连接筋(123)与第三表面(121a)相连；第四表面(121b)于背向第三表面(121a)与第一连接筋(122)相连处的位置设有第一推点(121d)；第四表面(121b)于背向第三表面(121a)与第二连接筋(123)相连处的位置设有第二推点(121e)。

Description

下塑胶、端盖组件、储能装置及储能系统 技术领域
本申请涉及储能技术领域，特别是涉及一种下塑胶、端盖组件、储能装置及储能系统。
背景技术
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。
下塑胶在注塑成型时，通常需要完全冷却后才能脱模，生产效率低。为了提高生产效率，将还未完全冷却的下塑胶脱模时，下塑胶的通气板容易出现翘曲、变形、拉模等现象，良品率较低。
发明内容
本申请所要解决的技术问题在于，提供一种在脱模时不易出现翘曲、变形、拉模等现象的下塑胶、端盖组件、储能装置及储能系统。
第一方面，本申请提供一种下塑胶，其包括：
主体部，包括沿第一方向相背设置第一表面和第二表面；
通气部，所述通气部包括通气板、第一连接筋、第二连接筋和连接边，所述连接边与所述主体部沿第二方向相间隔，所述通气板沿所述第二方向位于所述主体部和所述连接边之间，所述通气板包括沿所述第一方向相背设置的第三表面和第四表面，所述第四表面沿所述第一方向位于所述第二表面背向所述第一表面的一方；所述通气板包括贯通所述第三表面和所述第四表面的通气孔；所述第一连接筋和所述第二连接筋沿第三方向相对设置，所述第一连接筋的两端分别与所述主体部、所述通气部相连；所述第二连接筋的两端分别与所述主体部、所述通气部相连；所述第一连接筋、所述第二连接筋沿所述第一方向与所述第三表面相连；所述第一连接筋、所述第二连接筋连接于所述第三表面的位置与所述通气孔不重叠；
其中，所述第四表面于背向所述第三表面与所述第一连接筋相连处的位置设有第一推点；所述第四表面于背向所述第三表面与所述第二连接筋相连处的位置设有第二推点。
通气部用于与防爆阀对应，能够为防爆阀在开启时提供聚气的聚气空间，通气部能够使气体流动并汇集至防爆阀下方。使所述第四表面沿所述第一方向位于所述第二表面背向所述第一表面的一方，若控制通气板的厚度不变，通气部会具有更大的空间供防爆阀聚气。由于所述第四表面沿所述第一方向位于所述第二表面背向所述第一表面的一方，使得通气板在脱模时更容易出现拉模、变形等现象。在第四表面设有第一推点和第二推点，下塑胶在脱模时，第一推点、第二推点用于分别与模具中顶针接触，模具中的顶针活动时，能够将下塑胶顶出，使下塑胶脱模。其中，第一推点设于所述第四表面中背向所述第三表面与所述第一连接筋相连处的位置，顶针与第一推点接触并推动下塑胶脱模时，第一连接筋能够提高第一推点的结构强度，在第一推点受到顶针推力时，能够降低第一推点的凹陷程度，降低出现拉模概率，提高下塑胶的良品率。第二推点设于所述第四表面中背向所述第三表面与所述第二连接筋相连处的位置，顶针与第二推点接触并推动下塑胶脱模时，第二连接筋能够提高第二推点的结 构强度，在第二推点受到顶针的推力时，能降低第二推点的凹陷程度，降低拉模概率，提高下塑胶的良品率。第一连接筋和第二连接筋与通气板连接的区域不设置通孔，能够提高第一连接筋、第二连接筋与通气板的连接结构强度，进而能够提高下塑胶的整体结构强度。
结合第一方面，在一种可能的实现方式中，所述第一推点的半径大于所述第三推点的直径，所述第二推点的半径大于所述第三推点的半径。
第四表面中的第一推点、第二推点和第三推点分别与模具的顶针抵接，模具的顶针活动时，第一推点、第二推点和第三推点共同受力，能够使通气板脱模，提高通气板的脱模良品率。由于第一推点设于所述第四表面中背向所述第三表面与所述第一连接筋相连处的位置；第二推点设于第四表面中背向所述第三表面与所述第二连接筋相连处的位置，而所述第一连接筋、所述第二连接筋连接于所述第三表面的位置与所述通气孔不重叠。可以得到，第四表面中背向所述第一连接筋与第三表面相连处的位置具有较大空间形成半径较大第一推点，第四表面中背向所述第二连接筋与第三表面相连处的位置具有较大空间形成半径较大第二推点。相对于第三推点，第一推点和第二推点的半径较大，第一推点、第二推点与模具中顶针的接触面积较大，第一推点、第二推点与模具中顶针之间的压强会较小，一方面能够降低下塑胶脱模时因通气板局部受力过大而形成翘曲或变形的概率。另一方面能够提前使下塑胶脱模，不需要等到下塑胶完全冷却再执行脱模动作，提升下塑胶的生产效率。
结合第一方面，在一种可能的实现方式中，所述第一推点和所述第二推点的半径均为r1，所述第三推点的半径为r2，1/3≤r2/r1≤2/3。
下塑胶在脱模时，通气板的各个局部受力可能不相同，通过设置与第三推点不同半径的第一推点和第二推点，降低通气板局部受力过于集中而出现翘曲或变形的概率。第一推点、第二推点和第三推点与通气孔的位置不重叠，通气孔的存在以及排布会限制第一推点、第二推点和第三推点的半径。若r2/r1的值过小，以r2为定值，势必对通气孔的布置位置产生较大的影响，从而会影响通气板流通气体的能力。若r2/r1的值过大，以r2为定值，不足以均衡下塑胶在脱模时通气板各个局部的受力。
结合第一方面，在一种可能的实现方式中，所述通气板沿所述第三方向包括第一端和第二端，所述多个第三推点分为第一组、第二组和第三组，所述第二组具有两个以上所述第三推点，所述第一组中的所述第三推点分布于所述第一端和所述第一推点之间，所述第二组中的所述第三推点分布于所述第一推点和所述第二推点之间，所述第三组中的所述第三推点分布于所述第二推点和所述第二端之间；
其中，所述第一组中与所述第一推点相邻的第三推点与所述第一推点的距离为d1，所述第二组中相邻两个第三推点之间的距离为d2，所述第三组中与所述第二推点相邻的第三推点与所述第二推点之间的距离为d3，d2＜d1，d2＜d3。
下塑胶在脱模时，通气板两端之间的区域容易受到较大的应力，使第一推点和第二推点之间的第三推点较为集中的布置，能够使下塑胶在脱模时通气板的受力更均匀，能够降低通气板出现拉模、变形的概率，提高产品良率。
结合第一方面，在一种可能的实现方式中，1/4≤d2/d1≤3/4，1/4≤d2/d3≤3/4。
1/4≤d2/d1≤3/4，1/4≤d2/d3≤3/4，能够在下塑胶进行脱模时使通气板的受力更为均匀。若d2/d1的比值过小，下塑胶在脱模时，通气板的两端容易出现翘曲，若d2/d1的比值过大，在下塑胶脱模时不能达到使通气板受力更为均匀的效果，通气板容易出现拉模的现象。
结合第一方面，在一种可能的实现方式中，所述第一连接筋、所述第二连接筋、所述主体部、所述连接边和所述通气板围成用于供防爆阀聚气的聚气空间，所述第一连接筋两端之 间的区域朝远离于所述第二连接筋的方向拱起，所述第二连接筋两端之间的区域朝远离于所述第一连接筋的方向拱起；
所述防爆阀包括防爆片和设于顶盖的防爆孔，所述防爆片的外周与防爆孔的内壁焊接形成焊痕部，所述第一连接筋背向所述通气板的表面和所述第二连接筋背向所述通气板的表面与所述顶盖抵接，所述焊痕部沿所述第一方向的投影位于所述聚气空间内。
聚气空间一方面能够供防爆阀聚气，另一方面能够为气体导向，进而使储能装置内的气体从开启的防爆阀处排出至储能装置外。由于所述第一连接筋两端之间的区域朝远离于所述第二连接筋的方向拱起，所述第二连接筋两端之间的区域朝远离于所述第一连接筋的方向拱起，能够增大聚气空间，方便储能装置内更多气体从开启的防爆阀处排出至储能装置外。第一连接筋和第二连接筋设于防爆阀的防爆片之外，避免电池意外跌落时，卷绕式电极组件冲击下塑胶，进而造成防爆阀误开启，提升电池的安全性能。
结合第一方面，在一种可能的实现方式中，所述通气板与所述主体部相间隔形成第一通气口，所述通气板与所述连接边相间隔形成第二通气口，所述第一通气口、所述第二通气口均与所述聚气空间连通。
第一通气口和第二通气口能够方便储能装置内的气体进入到聚气空间，再从聚气空间排出到储能装置外；第一通气口和第二通气口处于通气板沿第二方向的两侧，从第一通气口进入到聚气空间产生负压能够均衡从第二通气口进入聚气空间而产生的负压。提高通气板的受力稳定性，进一步提高下塑胶的结构稳定性。
结合第一方面，在一种可能的实现方式中，所述通气部还包括第一加强筋和第二加强筋，所述第一加强筋的两端分别与所述主体部、所述连接边相连，且所述第一加强筋与所述通气板的第一端呈弯弧连接；所述第二加强筋的两端分别与所述主体部、所述连接边相连，且所述第二加强筋与所述通气板的第二端呈弯弧连接，其中，第一连接筋和第二连接筋处于第一加强筋和第二加强筋之间。
通过第一加强筋和第二加强筋能够增强通气板与主体部的连接强度，还能够提高通气部的结构强度，进一步提高下塑胶的整体强度。避免通气板沿第三方向两端直角连接形成尖锐部，防止电池意外跌落时，卷绕式电极组件冲击下塑胶被尖锐部划伤电极组件的电极片造成内部短路。
结合第一方面，在一种可能的实现方式中，所述主体部还具有安装凸台，所述安装凸台包括沿所述第一方向相对设置的第五表面和第六表面，所述第五表面凸出于所述第一表面，所述第六表面沿所述第一方向位于所述第一表面和所述第二表面之间；所述安装凸台还设有贯穿所述第五表面和所述第六表面的安装通孔。
安装凸台用于安装极柱，极柱贯穿安装通孔。其中，所述第五表面凸出于所述第一表面，所述第六表面沿所述第一方向位于所述第一表面和所述第二表面之间，使得第一表面和第五表面形成台阶，极柱不会直接作用在第一表面上，降低在将极柱安装至安装通孔时使主体部出现变形的可能性。第二表面和第六表面形成台阶能够限制极柱的位置，提高极柱的安装稳定性。
结合第一方面，在一种可能的实现方式中，所述主体部包括沿所述第三方向相背设置的第一侧边和第二侧边，所述主体部还包括与所述第一连接筋、所述第二连接筋相连的第三侧边，所述第一侧边、所述第二侧边和所述第三侧边均凸出于所述第二表面。
第一侧边、第二侧边和第三侧边能够提高薄片状主体部在第二方向、第三方向上的整体强度，第三侧边的设置能够提高主体板与第一连接筋、第二连接筋的连接强度。
结合第一方面，在一种可能的实现方式中，所述第一表面和所述第二表面沿所述第一方向的距离为h1，所述第三侧边沿所述第一方向的尺寸为h2，1/3≤h1/h2≤2/3。
可以得出，第三侧边沿第一方向的尺寸大于第一表面到第二表面的尺寸，使得主体部与第一连接筋、第二连接筋的连接面积更大，能够提高第一连接筋、第二连接筋与第三侧边的连接强度。若h1/h2的值过小，在第一表面和所述第二表面的距离为一定值时，第三侧边沿第一方向的尺寸会过大，会使得第三侧边沿第一方向的尺寸过大，造成下塑胶占用空间过大。若h1/h2的值过大，在第一表面和所述第二表面的距离为一定值时，第三侧边沿第一方向的尺寸过小，对提高第一连接筋、第二连接筋与第三侧边的连接强度的效果不明显。
结合第一方面，在一种可能的实现方式中，所述下塑胶还包括沉台，所述沉台连接于所述主体部远离所述通气部的一端，所述沉台包括沿所述第一方向相对设置的第七表面和第八表面，所述第八表面凸出于所述第二表面。
沉台能够提高下塑胶的结构强度，沉台和第一侧边、第二侧边和第三侧边围成安装空间，端盖组件中与下塑胶相连的部件可以在安装空间与下塑胶相连，能够提高端盖组件的结构紧凑性，沉台、第一侧边、第二侧边和第三侧边能够对安装至安装空间的部件具有限位作用。
结合第一方面，在一种可能的实现方式中，所述第七表面设有沿第三方向排布的多个凹槽，每个凹槽的底部均设有通孔。
沉台设有凹槽能够减轻下塑胶的重量，减少成型沉台所需的材料，降低成本。通孔能够用于流通气体，能够释放储能装置内部的压力。
结合第一方面，在一种可能的实现方式中，所述第二表面设有多个第四推点，所述多个第四推点关于所述对称面对称设置。
第四推点用于使下塑胶脱模时与模具中的顶针相抵接，模具中的顶针活动时，推动第四推点，能够使下塑胶脱模，降低主体部出现拉模、形变的可能性，提高下塑胶的生产良率。
结合第一方面，在一种可能的实现方式中，所述第八表面设有多个第五推点，所述多个第五推点关于所述对称面对称设置。
第五推点用于使下塑胶脱模时与模具中的顶针相抵接，模具中的顶针活动时，推动第五推点，能够使下塑胶脱模，降低沉台出现拉模、形变的可能性，提高下塑胶的生产良率。
结合第一方面，在一种可能的实现方式中，所述下塑胶关于所述对称面对称。
能够提高下塑胶的整体均匀性，能够提高下塑胶整体的结构强度，提高下塑胶的生产良率。可以得到，第一推点与第二推点对称、多个第三推点对称设置、多个第四推点对称设置以及多个第五推点对称设置，在脱模下塑胶时能够使下塑胶的整体受力更为均匀，能够降低下塑胶拉模、变形的可能性。
第二方面，本申请公开了一种端盖组件，其包括：
如第一方面所述下塑胶；
顶盖，盖设于所述下塑胶；
防爆阀，安装于所述顶盖，并与所述通气部相对应。
第三方面，本申请公开了一种储能装置，其包括电芯组件、转接件和第二方面所述的端盖组件，所述转接件连接所述电芯组件和所述端盖组件。
第四方面，本申请公开了一种储能系统，其包括转换装置、负载和如第三方面所述的储能装置，所述转换装置用于转换能量以输出电能，所述转换装置与所述储能装置电连接，所述储能装置与所述负载电连接。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1为本申请一实施例提供的储能系统的结构示意图；
图2为本申请一实施例提供的储能装置的结构示意图；
图3为本申请一实施例提供的端盖组件的结构示意图；
图4为图3的分解示意图；
图5为本申请一实施例提供的端盖组件省略下塑胶的结构示意图；
图6为本申请一实施例提供的下塑胶的立体结构示意图；
图7为图6的另一视角的结构示意图；
图8为图7的平面示图；
图9为图8中A-A的剖视图。
附图标记说明：
1000、储能装置；1100、电芯组件；1200、端盖组件；
100、下塑胶；
110、主体部；111、第一表面；112、第二表面；112a、第四推点；113、安装凸台；113a、
安装通孔；113b、第五表面；113c、第六表面；114、第一侧边；115、第二侧边；116、第三侧边；
120、通气部；121、通气板；121a、第三表面；121b、第四表面；121c、通气孔；121d、
第一推点；121e、第二推点；121f、第三推点；121g、第一端；121h、第二端；122、第一连接筋；123、第二连接筋；124、连接边；125、聚气空间；126、第一通气口；127、第二通气口；128、第一加强筋；129、第二加强筋；
130、沉台；131、第七表面；132、第八表面；132a、第五推点；133、凹槽；133a、通
孔；M、对称面；
200、顶盖；
300、防爆阀；310、防爆片；320、防爆孔；330、焊痕部；400、极柱；
2000、光伏板；3000、风机；4000、电网。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。
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，本申请提供一种储能装置，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。
请参考图1，本申请实施例提供的储能装置应用于一种储能系统，该储能系统包括光能转换装置(光伏板2000)、风能转换装置(风机3000)、电网4000以及储能装置1000，光能转换装置和风能转换装置属于或是转换装置。该储能装置1000装载于储能柜，可以安装于室外。具体的，光伏板2000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电网4000，或者在电网4000断电/停电时进行供电。风能转换装置(风机3000)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电网4000，或者在电网4000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。
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，数个储能装置1000采用隔离板(图未示)进行支撑及电连接。本实施例中，“数个”是指两个及两个以上。储能装置1000外部还可以设有储能箱，用于收容储能装置1000。
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。
请参见图2，储能装置1000包括电芯组件1100、转接件和端盖组件1200，电芯组件1100通过转接件与端盖组件1200相连，具体地，转接件连接于电芯组件1100合端盖组件1200之间。电芯组件1100能够输出电能，端盖组件1200用于与负载或转换装置电连接。
请参见图3-图5，本申请还公开了一种端盖组件1200，端盖组件1200包括下塑胶100、顶盖200和防爆阀300，下塑胶100和顶盖200配合能够定位极柱400的位置，极柱400还与电芯组件1100电连接，下塑胶100具有良好的绝缘性能，能够降低极柱400漏电的可能性。防爆阀300用于在储能装置1000的内部具有较高压强时泄去储能装置1000内部的压力，降低储能装置1000因内部压力过大而发生爆炸的可能性。
为方便描述，定义下塑胶100的长度方向为X轴方向，下塑胶100的宽度方向为Y轴方向，下塑胶100的厚度方向为Z轴方向。
请参见图6-图9，本申请还公开了一种下塑胶100，其包括主体部110、通气部120和沉台130，主体部110的厚度方向为第一方向，第一方向为Z轴方向。通气部120、主体部110和沉台130沿第二方向依次相连。其中，第二方向为X轴方向。下塑胶100为绝缘材质制成， 下塑胶100可以通过注塑工艺成型，可以理解的，主体部110、通气部120和沉台130均为绝缘材质。
主体部110包括沿第一方向相背设置的第一表面111和第二表面112，主体部110大致呈板状。
主体部110包括沿第三方向相背设置的第一侧边114和第二侧边115，第三方向为Y轴方向。主体部110还包括与第一连接筋122、第二连接筋123相连的第三侧边116，第三侧边116的两端分别与第一侧边114、第二侧边115相连，第一侧边114、第二侧边115和第三侧边116均沿Z轴凸出于第二表面112。第一侧边114、第二侧边115和第三侧边116能够提高主体部110的整体强度，第三侧边116还能够提高主体板与第一连接筋122、第二连接筋123的连接强度。
沉台130、第一侧边114、第二侧边115和第三侧边116围成安装空间，端盖组件1200中与下塑胶100相连的部件可以在安装空间与下塑胶100相连，能够提高端盖组件1200的结构紧凑性，沉台130、第一侧边114、第二侧边115和第三侧边116能够对安装至安装空间的部件具有限位作用，能够提高端盖组件1200的结构强度。
其中，第一表面111和第二表面112沿第一方向的距离为h1，第三侧边116沿第一方向的尺寸为h2，1/3≤h1/h2≤2/3。第一表面111到第二表面112沿第一方向的距离为主体部110中被沉台130、第一侧边114、第二侧边115和第三侧边116所包围的中间区域的厚度。可以得出，第三侧边116沿第一方向的尺寸大于第一表面111到第二表面112的尺寸，使得主体部110与第一连接筋122、第二连接筋123的连接面积更大，进而能够提高第一连接筋122、第二连接筋123与第三侧边116的连接强度。若h1/h2的值过小，在第一表面111和第二表面112的距离为一定值时，第三侧边116沿第一方向的尺寸会过大，会使得第三侧边116沿第一方向的尺寸过大，造成下塑胶100占用空间过大，会降低储能装置1000的能量密度。若h1/h2的值过大，在第一表面111和第二表面112的距离为一定值时，第三侧边116沿第一方向的尺寸过小，对提高第一连接筋122、第二连接筋123与第三侧边116的连接强度的效果不明显。
通气部120包括通气板121、第一连接筋122、第二连接筋123和连接边124，连接边124与主体部110沿第二方向相间隔，通气板121沿第二方向位于主体部110和连接边124之间，通气板121包括沿第一方向相背设置的第三表面121a和第四表面121b，第四表面121b沿第一方向位于第二表面112背向第一表面111的一方；通气板121包括贯通第三表面121a和第四表面121b的通气孔121c；第一连接筋122和第二连接筋123关于对称面M对称设置，对称面M位于通气板121沿第三方向相对设置的两端中间，第三方向为Y轴方向。第一连接筋122的两端分别与主体部110、连接边124相连；第二连接筋123的两端分别与主体部110、连接边124相连；第一连接筋122、第二连接筋123沿第一方向与第三表面121a相连；第一连接筋122、第二连接筋123连接于第三表面121a的位置与通气孔121c不重叠。其中，沿Z轴方向，第一表面111的所在水平面高于第二表面112的所在水平面，第三表面121a的所在水平面高于第四表面121b所在水平面，且第四表面121b所在水平面低于第二表面112所在水平面。在一种可能的实现方式中，第三表面121a所在水平面低于第二表面112所在水平面，可以理解地，第三表面121a和第二表面112可以存在高度差。
第一连接筋122、第二连接筋123、主体部110、连接边124和通气板121围成用于供防爆阀300聚气的聚气空间125，聚气空间125能够使气体流动并汇集至防爆阀下方。第一连接筋122两端之间的区域朝远离于第二连接筋123的方向拱起，第二连接筋123两端之间的 区域朝远离于第一连接筋122的方向拱起。其中，沿Z轴方向，第一连接筋122以及第二连接筋123的截面大致呈弧形。聚气空间125一方面能够供防爆阀300聚气，另一方面能够为气体导向，进而使储能装置1000内的气体从开启的防爆阀300处排出至储能装置1000外。由于第一连接筋122两端之间的区域朝远离于第二连接筋123的方向拱起，第二连接筋123两端之间的区域朝远离于第一连接筋122的方向拱起，能够增大聚气空间125，方便储能装置1000内更多气体从开启的防爆阀300处排出至储能装置1000外。
请参见图4和图5，防爆阀300包括防爆片310和设于顶盖的防爆孔320，防爆片310的外周与防爆孔320的内壁焊接形成焊痕部330，第一连接筋122背向通气板121的表面和第二连接筋123背向通气板121的表面与顶盖200抵接，焊痕部330沿第一方向的投影位于聚气空间125内。其中，第一连接筋122和第二连接筋123设于防爆阀的防爆片310之外，能够避免电池意外跌落时，卷绕式电极组件冲击下塑胶，造成防爆阀误开启，进而能够提升电池的安全性能。
通气板121与主体部110相间隔形成第一通气口126，通气板121与连接边124相间隔形成第二通气口127，第一通气口126、第二通气口127均与聚气空间125连通。在本申请提供的实施例中，第一通气口126能够与第二通气口127对称设置，使得第一通气口126的通风量和第二通气口127的通风流量能够大致相同。第一通气口126和第二通气口127能够方便储能装置1000内的气体进入到聚气空间125，再从聚气空间125排出到储能装置1000外；第一通气口126和第二通气口127处于通气板121沿第二方向的两侧，从第一通气口126进入到聚气空间125产生负压能够均衡从第二通气口127进入聚气空间125而产生的负压。提高通气板121的受力稳定性，进一步提高下塑胶100的结构稳定性。
通气部120还包括第一加强筋128和第二加强筋129，第一加强筋128的两端分别与主体部110、连接边124相连，且第一加强筋128与通气板121的第一端121g呈弯弧连接；第二加强筋129的两端分别与主体部110、连接边124相连，且第二加强筋129与通气板121的第二端121h呈弯弧连接。其中，第一连接筋122和第二连接筋123处于第一加强筋128和第二加强筋129之间。通过第一加强筋128和第二加强筋129能够增强通气板121与主体部110的连接强度，还能够提高通气部120的结构强度，进一步提高下塑胶100的整体强度。
其中，第四表面121b于背向第三表面121a与第一连接筋122相连处的位置设有第一推点121d；第四表面121b于背向第三表面121a与第二连接筋123相连处的位置设有第二推点121e。
通气部120用于与防爆阀300对应，能够为防爆阀300在开启时提供聚气的聚气空间，通气部120能够使气体流动并汇集至防爆阀下方。为了提高防爆阀300的聚气空间，使第四表面121b沿第一方向位于第二表面112背向第一表面111的一方，若控制通气板121的厚度不变，通气部120会具有更大的空间供防爆阀300聚气。由于第四表面121b沿第一方向位于第二表面112背向第一表面111的一方，使得通气板121在脱模时更容易出现拉模、变形等现象。在第四表面121b设有第一推点121d和第二推点121e，下塑胶100在脱模时、第一推点121d、第二推点121e用于分别与模具中顶针接触，模具中的顶针活动，能够将下塑胶100顶出，使下塑胶100脱模。其中，第一推点121d设于第四表面121b中背向第三表面121a与第一连接筋122相连处的位置，顶针与第一推点121d接触并推动下塑胶100脱模时，第一连接筋122能够提高第一推点121d的结构强度，在第一推点121d受到顶针推力时，能够降低第一推点121d的凹陷程度，降低出现拉模概率，提高下塑胶100的良品率。第二推点121e设于第四表面121b中背向第三表面121a与第二连接筋123相连处的位置，顶针与第二推点 121e接触并推点下塑胶100脱模时，第二连接筋123能够提高第二推点121e的结构强度，在第二推点121e受到顶针的推力时，能降低第二推点121e的凹陷程度，降低拉模概率，提高下塑胶100的良品率。第一连接筋122和第二连接筋123与通气板121连接的区域不设置通孔，能够提高第一连接筋122、第二连接筋123与通气板121的连接强度，进而能够提高下塑胶100的整体结构强度。
第四表面121b还设有多个第三推点121f，第一推点121d的半径大于第三推点121f的直径，第二推点121e的半径大于第三推点121f的半径。多个第三推点121f能够沿Y轴方向排布，多个推点沿Y方向对称设置。第四表面121b中的第一推点121d、第二推点121e和第三推点121f分别与模具的顶针抵接，模具的顶针活动时，第一推点121d、第二推点121e和第三推点121f共同受力，能够使通气板121脱模，提高通气板121的脱模良品率。由于第一推点121d设于第四表面121b中背向第三表面121a与第一连接筋122相连处的位置；第二推点121e设于第四表面121b中背向第三表面121a与第二连接筋123相连处的位置，而第一连接筋122、第二连接筋123连接于第三表面121a的位置与通气孔121c不重叠。可以得到，第四表面121b中背向第一连接筋122与第三表面121a相连处的位置具有较大空间形成半径较大的第一推点121d，第四表面121b中背向第二连接筋123与第三表面121a相连处的位置具有较大空间形成半径较大的第二推点121e。相对于第三推点121f，第一推点121d和第二推点121e的半径较大，第一推点121d、第二推点121e与模具中顶针的接触面积较大，第一推点121d、第二推点121e与模具中顶针之间的压强会较小，一方面能够降低下塑胶100脱模时因通气板121局部受力过大而形成翘曲或变形的概率。另一方面能够提前使下塑胶100脱模，不需要等到下塑胶100完全冷却再执行脱模，提升下塑胶100的生产效率。
在本申请提供的实施例中，第一推点121d和第二推点121e的半径均为r1，第三推点121f的半径为r2，1/3≤r2/r1≤2/3。下塑胶100在脱模时，通气板121的各个局部受力可能不相同，通过设置与第三推点121f不同半径的第一推点121d和第二推点121e，降低通气板121局部受力过于集中而出现翘曲或变形的概率。第一推点121d、第二推点121e和第三推点121f与通气孔121c的位置不重叠，通气孔121c的存在以及排布会限制第一推点121d、第二推点121e和第三推点121f的半径大小。若r2/r1的值过小，以r2为定值，势必较大的影响到通气孔121c的布置位置，会影响通气板121流通气体的能力。若r2/r1的值过大，以r2为定值，不足以均衡下塑胶100在脱模时通气板121各个局部的受力。
通气板121沿第三方向包括第一端121g和第二端121h，多个第三推点121f分为第一组、第二组和第三组，第二组具有两个以上第三推点121f，第一组中的第三推点121f分布于第一端121g和第一推点121d之间，第二组中的第三推点121f分布于第一推点121d和第二推点121e之间，第三组中的第三推点121f分布于第二推点121e和第二端121h之间；可以得到，第二组中的第三推点121f位于第四表面121b居中的位置。使第二组中的第三推点121f更为集中的分布于第四表面121b的居中位置，在下塑胶100脱模时能够均衡通气板121各局部的受力。
其中，第一组中与第一推点121d相邻的第三推点121f与第一推点121d的距离为d1，第二组中相邻两个第三推点121f之间的距离为d2，第三组中与第二推点121e相邻的第三推点121f与第二推点121e之间的距离为d3，d2＜d1，d2＜d3。
下塑胶100在脱模时，位于通气板121中第一端121g和第二端121h之间的区域容易受到较大的应力，使第一推点121d和第二推点121e之间的第三推点121f较为集中的布置，能够使下塑胶100在脱模时通气板121的受力更均匀，能够降低通气板121出现拉模、变形的 概率，提高产品良率。
1/4≤d2/d1≤3/4，1/4≤d2/d3≤3/4。1/4≤d2/d1≤3/4，1/4≤d2/d3≤3/4，能够在下塑胶100进行脱模时使通气板121的受力更为均匀。若d2/d1的比值过小，下塑胶100在脱模时，通气板121的两端容易出现翘曲，若d2/d1的比值过大，在下塑胶100进行脱模时不能达到使通气板121受力更为均匀的效果，通气板121容易出现拉模的现象。
主体部110还具有安装凸台113，安装凸台113包括沿第一方向相对设置的第五表面113b和第六表面113c，第五表面113b凸出于第一表面111，第六表面113c沿第一方向位于第一表面111和第二表面112之间；安装凸台113还设有贯穿第五表面113b和第六表面113c的安装通孔113a。
安装凸台113用于安装极柱400，极柱400贯穿安装通孔113a。其中，第五表面113b凸出于第一表面111，第六表面113c沿第一方向位于第一表面111和第二表面112之间，使得第一表面111和第五表面113b形成台阶，极柱400不会直接作用在第一表面111上，降低在将极柱400安装至安装通孔113a时使主体部110出现变形的可能性。第二表面112和第六表面113c形成台阶能够限制极柱400的位置，提高极柱400的安装稳定性。
沉台130连接于主体部110远离通气部120的一端，沉台130包括沿第一方向相对设置的第七表面131和第八表面132，第八表面132凸出于第二表面112。
第七表面131设有沿第三方向排布的多个凹槽133，每个凹槽133的底部均设有通孔133a。沉台130设有凹槽133能够减轻下塑胶100的重量，减少成型沉台130所需的材料，降低成本，通孔133a能够用于流通气体。
第二表面112设有多个第四推点112a，多个第四推点112a关于对称面M对称设置。第四推点112a用于使下塑胶100脱模时与模具中的顶针相抵接，模具中的顶针活动时，推动第四推点112a，能够使下塑胶100脱模，降低主体部110出现拉模、形变的可能性，提高下塑胶100的生产良率。
第八表面132设有多个第五推点132a，所述多个第五推点132a关于对称面M对称设置。第五推点132a用于使下塑胶100脱模时与模具中的顶针相抵接，模具中的顶针活动时，推动第五推点132a，能够使下塑胶100脱模，降低沉台130出现拉模、形变的可能性，提高下塑胶100的生产良率。
下塑胶100关于对称面M对称，对称面M与第三方向垂直。能够提高下塑胶100的整体均匀性，能够提高下塑胶100整体的结构强度，提高下塑胶100的生产良率。可以得到，第一推点121d与第二推点121e对称、多个第三推点121f对称设置、多个第四推点112a对称设置以及多个第五推点132a对称设置，在脱模下塑胶100时能够使下塑胶100的整体受力更为均匀，能够降低下塑胶100出现拉模、变形的可能性。
需要说明，本申请实施例中所有方向性指示(诸如上、下、左、右、前、后……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，在本申请中如涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“连接”、“固定”等应做广义理解，例如，“固定”可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是 电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
另外，本申请各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (19)

  1. 一种下塑胶，其中，包括：
    主体部，包括沿第一方向相背设置的第一表面和第二表面；
    通气部，所述通气部包括通气板、第一连接筋、第二连接筋和连接边，所述连接边与所述主体部沿第二方向相间隔，所述通气板沿所述第二方向位于所述主体部和所述连接边之间，所述通气板包括沿所述第一方向相背设置的第三表面和第四表面，所述第四表面沿所述第一方向位于所述第二表面背向所述第一表面的一方；所述通气板包括贯通所述第三表面和所述第四表面的通气孔；所述第一连接筋的两端分别与所述主体部、所述连接边相连；所述第二连接筋的两端分别与所述主体部、所述连接边相连；所述第一连接筋、所述第二连接筋沿所述第一方向与所述第三表面相连；所述第一连接筋、所述第二连接筋连接于所述第三表面的位置与所述通气孔不重叠；所述第一连接筋和所述第二连接筋关于对称面对称，所述对称面位于所述通气板沿第三方向相对设置的两端中间；
    其中，所述第四表面于背向所述第三表面与所述第一连接筋相连处的位置设有第一推点；所述第四表面于背向所述第三表面与所述第二连接筋相连处的位置设有第二推点。
  2. 如权利要求1所述的下塑胶，其中，所述第四表面还设有多个第三推点，所述第一推点的半径大于所述第三推点的直径，所述第二推点的半径大于所述第三推点的半径。
  3. 如权利要求2所述的下塑胶，其中，所述第一推点和所述第二推点的半径均为r1，所述第三推点的半径为r2，1/3≤r2/r1≤2/3。
  4. 如权利要求2所述的下塑胶，其中，所述通气板沿所述第三方向包括第一端和第二端，所述多个第三推点分为第一组、第二组和第三组，所述第二组具有两个以上所述第三推点，所述第一组中的所述第三推点分布于所述第一端和所述第一推点之间，所述第二组中的所述第三推点分布于所述第一推点和所述第二推点之间，所述第三组中的所述第三推点分布于所述第二推点和所述第二端之间；
    其中，所述第一组中与所述第一推点相邻的第三推点与所述第一推点的距离为d1，所述第二组中相邻两个第三推点之间的距离为d2，所述第三组中与所述第二推点相邻的第三推点与所述第二推点之间的距离为d3，d2＜d1，d2＜d3。
  5. 如权利要求4所述的下塑胶，其中，1/4≤d2/d1≤3/4，1/4≤d2/d3≤3/4。
  6. 如权利要求1-5任一项所述的下塑胶，其中，所述第一连接筋、所述第二连接筋、所述主体部、所述连接边和所述通气板围成用于供防爆阀聚气的聚气空间，所述第一连接筋两端之间的区域朝远离于所述第二连接筋的方向拱起，所述第二连接筋两端之间的区域朝远离于所述第一连接筋的方向拱起；
    所述防爆阀包括防爆片和设于顶盖的防爆孔，所述防爆片的外周与防爆孔的内壁焊接形成焊痕部，所述第一连接筋背向所述通气板的表面和所述第二连接筋背向所述通气板的表面与所述顶盖抵接，所述焊痕部沿所述第一方向的投影位于所述聚气空间内。
  7. 如权利要求6所述的下塑胶，其中，所述通气板与所述主体部相间隔形成第一通气口，所述通气板与所述连接边相间隔形成第二通气口，所述第一通气口、所述第二通气口均与所述聚气空间连通。
  8. 如权利要求6所述的下塑胶，其中，所述通气部还包括第一加强筋和第二加强筋，所述第一加强筋的两端分别与所述主体部、所述连接边相连，且所述第一加强筋与所述通气板的第一端呈弯弧连接；所述第二加强筋的两端分别与所述主体部、所述连接边相连，且所述第二加强筋与所述通气板的第二端呈弯弧连接，其中，第一连接筋和第二连接筋处于第一加强筋和第二加强筋之间。
  9. 如权利要求1-8任一项所述的下塑胶，其中，所述主体部还具有安装凸台，所述安装凸台包括沿所述第一方向相对设置的第五表面和第六表面，所述第五表面凸出于所述第一表面，所述第六表面沿所述第一方向位于所述第一表面和所述第二表面之间；所述安装凸台还设有贯穿所述第五表面和所述第六表面的安装通孔。
  10. 如权利要求1-9任一项所述的下塑胶，其中，所述主体部包括沿所述第三方向相背设置的第一侧边和第二侧边，所述主体部还包括与所述第一连接筋、所述第二连接筋相连的第三侧边，所述第一侧边、所述第二侧边和所述第三侧边均凸出于所述第二表面。
  11. 如权利要求10所述的下塑胶，其中，所述第一表面和所述第二表面沿所述第一方向的距离为h1，所述第三侧边沿所述第一方向的尺寸为h2，1/3≤h1/h2≤2/3。
  12. 如权利要求1-10任一项所述的下塑胶，其中，还包括沉台，所述沉台连接于所述主体部远离所述通气部的一端，所述沉台包括沿所述第一方向相对设置的第七表面和第八表面，所述第八表面凸出于所述第二表面。
  13. 如权利要求12所述的下塑胶，其中，所述第七表面设有沿第三方向排布的多个凹槽，每个凹槽的底部均设有通孔。
  14. 如权利要求1-13任一项所述的下塑胶，其中，所述第二表面设有多个第四推点，所述多个第四推点关于所述对称面对称设置。
  15. 如权利要求12所述的下塑胶，其中，所述第八表面设有多个第五推点，所述多个第五推点关于所述对称面对称设置。
  16. 如权利要求1-15任一项所述的下塑胶，其中，所述下塑胶关于所述对称面对称。
  17. 一种端盖组件，其特征在于，包括：
    如权利要求1-16任一项所述下塑胶；
    顶盖，盖设于所述下塑胶；
    防爆阀，安装于所述顶盖，并与所述通气部相对应。
  18. 一种储能装置，其中，包括电芯组件、转接件和如权利要求17所述的端盖组件，所述转接件连接所述电芯组件和所述端盖组件。
  19. 一种储能系统，其中，包括转换装置、负载和如权利要求18所述的储能装置，所述转换装置用于转换能量以输出电能，所述转换装置与所述储能装置电连接，所述储能装置与所述负载电连接。
PCT/CN2023/107074 2023-07-12 2023-07-12 下塑胶、端盖组件、储能装置及储能系统 Pending WO2025010674A1 (zh)

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