WO2024104442A1 - 下塑胶件、顶盖组件、储能装置及用电设备 - Google Patents

下塑胶件、顶盖组件、储能装置及用电设备 Download PDF

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Publication number
WO2024104442A1
WO2024104442A1 PCT/CN2023/132111 CN2023132111W WO2024104442A1 WO 2024104442 A1 WO2024104442 A1 WO 2024104442A1 CN 2023132111 W CN2023132111 W CN 2023132111W WO 2024104442 A1 WO2024104442 A1 WO 2024104442A1
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WO
WIPO (PCT)
Prior art keywords
top cover
explosion
proof valve
lower plastic
plastic part
Prior art date
Application number
PCT/CN2023/132111
Other languages
English (en)
French (fr)
Inventor
周文扬
Original Assignee
厦门海辰储能科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 厦门海辰储能科技股份有限公司 filed Critical 厦门海辰储能科技股份有限公司
Publication of WO2024104442A1 publication Critical patent/WO2024104442A1/zh

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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
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • 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
    • 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
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • 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
    • 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 technical field of battery assembly, and in particular to a lower plastic part, a top cover assembly, an energy storage device and an electrical device.
  • the lower plastic part of the top cover assembly is arranged between the explosion-proof valve and the battery cell, when a large amount of gas accumulates inside the battery, the lower plastic part will hinder the gas from flowing to the explosion-proof valve, resulting in failure to release pressure in time.
  • the embodiment of the present application discloses a lower plastic part, a top cover assembly, an energy storage device and an electrical device.
  • the lower plastic part can guide the gas to flow toward the explosion-proof valve, thereby effectively improving the safety of battery use.
  • the present application discloses a lower plastic part, which is applied to a top cover assembly, wherein the top cover assembly comprises a top cover body and an explosion-proof valve, wherein the explosion-proof valve is arranged on the top cover body, and the lower plastic part comprises:
  • first surface being used to be disposed on the top cover body
  • a second surface the second surface is arranged opposite to the first surface, the second surface is convexly provided with a protrusion, and a vent hole is provided on a side of the protrusion facing away from the second surface, the vent hole penetrates the first surface, and the vent hole is configured to correspond to the explosion-proof valve, so that when the explosion-proof valve is arranged on the top cover body, the explosion-proof valve is at least partially located in the vent hole along the thickness direction of the top cover body.
  • the vent hole can be used to set a corresponding explosion-proof valve, so that when the explosion-proof valve is set on the top cover body, the explosion-proof valve can be at least partially located in the vent hole, thereby the ventilation space of the vent hole is large, and the gas generated by the battery cell of the energy storage device can be quickly and timely guided directly to the explosion-proof valve, so that the explosion-proof valve can release pressure normally.
  • the provision of the raised portion can also serve to stop and limit the battery cell when the battery cell of the energy storage device expands or moves, so that a buffer space can be formed between the lower plastic part itself and the battery cell, thereby avoiding the situation in which the battery cell is damaged by the collision and shattering of the lower plastic part or the cutting of the tabs on the battery cell due to mechanical vibration during the transportation of the battery cell, thereby protecting the battery cell and thus facilitating the service life of the energy storage device.
  • the present application further discloses a top cover assembly, the top cover assembly comprising:
  • the vent hole is connected to the pressure relief hole along the through direction of the pressure relief control, so that when the explosion-proof valve is installed on the pressure relief hole, the explosion-proof valve can correspond to the vent hole and be at least partially located in the vent hole, which is more conducive to the vent hole directly guiding the airflow to the explosion-proof valve, ensuring normal pressure relief of the explosion-proof valve.
  • the present application further discloses an energy storage device, comprising a shell, a battery cell and a top cover assembly as described in the second aspect above, wherein the shell has an opening, the battery cell is accommodated in the shell, the top cover body of the top cover assembly is connected to the shell to seal the opening, the lower plastic part is arranged toward the battery cell, and along the opening direction of the shell, the protrusion is located between the explosion-proof valve and the battery cell.
  • the raised part can be used to stop the battery cell and prevent the battery cell from touching the lower plastic part during movement or expansion, thereby causing damage to the battery cell.
  • the raised part can also increase the distance between the battery cell and the explosion-proof valve, so that the gas can be better discharged through the raised part.
  • the air hole is drained to the explosion-proof valve to achieve normal pressure relief.
  • the present application further discloses an electrical device, comprising the energy storage device as described in the third aspect.
  • the electrical device having the energy storage device as described in the third aspect can also achieve the beneficial effect of effectively improving the safety of battery use.
  • the vent hole can be used to correspond to the explosion-proof valve arrangement, so that when the explosion-proof valve is arranged on the top cover body, the explosion-proof valve can be at least partially accommodated in the vent hole, thereby the ventilation space of the vent hole is large, and the gas generated by the battery cell of the energy storage device can be quickly and timely guided directly to the explosion-proof valve, so that the explosion-proof valve can normally release pressure.
  • the provision of the raised portion can also serve to stop and limit the battery cell when the battery cell of the energy storage device expands or moves, so that a buffer space can be formed between the lower plastic part itself and the battery cell, thereby avoiding the situation in which the battery cell is damaged by the collision and shattering of the lower plastic part or the cutting of the tabs on the battery cell due to mechanical vibration during the transportation of the battery cell, thereby protecting the battery cell and thus facilitating the service life of the energy storage device.
  • FIG1 is a schematic diagram of the structure of the lower plastic part of the present application.
  • FIG2 is a schematic diagram of FIG1 from another viewing angle
  • FIG3 is a partial enlarged view of point A in FIG1 ;
  • FIG4 is a side view of the lower plastic part of the present application.
  • FIG5 is a schematic structural diagram of a top cover assembly of the present application.
  • FIG6 is a schematic diagram of FIG5 from another viewing angle
  • FIG7 is a cross-sectional view of the top cover assembly of the present application.
  • FIG8 is a schematic diagram of the structure of the energy storage device of the present application.
  • FIG9 is an internal cross-sectional view of the energy storage device of the present application.
  • FIG. 10 is a schematic diagram of the structure of the explosion-proof valve of the present application projected onto the battery cell.
  • installed should be understood in a broad sense.
  • it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components.
  • installed can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components.
  • first means two or more.
  • the present application discloses a lower plastic part 10, which can be applied to a top cover assembly of an energy storage device.
  • the energy storage device may include a battery, which may be but is not limited to a cylindrical battery, a square battery, etc.
  • the top cover assembly may include a top cover body and an explosion-proof valve, which is arranged on the top cover body to relieve the pressure of the internal gas of the energy storage device, so as to prevent the safety accident of explosion caused by the inability to relieve the pressure inside the energy storage device due to gas accumulation.
  • the lower plastic part 10 includes a first surface 11 and a second surface 12. When the lower plastic part 10 is applied to the top cover assembly, the first surface 11 can be used to be arranged on the top cover body.
  • the second surface 12 can be arranged opposite to the first surface 11, and the second surface 12 can be convexly provided with a protrusion 12a.
  • the side of the protrusion 12a facing away from the second surface 12 is provided There is a vent hole 120, which passes through the protrusion 12a to the first surface 11, that is, the vent hole 120 passes through the protrusion 12a, the second surface 12, and the first surface 11 in sequence.
  • the vent hole 120 can be configured to correspond to the explosion-proof valve setting of the top cover assembly, so that when the explosion-proof valve is set on the top cover body, the explosion-proof valve can be at least partially located in the vent hole 120 along the thickness direction of the top cover body.
  • the vent hole 120 can be used to correspond to the explosion-proof valve, so that when the explosion-proof valve is provided on the top cover body, the explosion-proof valve can be at least partially accommodated in the vent hole 120, thereby the ventilation space of the vent hole 120 is larger, and the gas generated by the battery cell of the energy storage device can be quickly and timely guided directly to the explosion-proof valve, so that the explosion-proof valve can release pressure normally.
  • the provision of the raised portion 12a can also play a role in stopping and limiting the battery cell when the battery cell of the energy storage device expands or moves, so that a buffer space can be formed between the second surface 12 of the lower plastic part 10 and the battery cell, thereby avoiding the situation in which the lower plastic part 10 collides and breaks or cuts the tabs on the battery cell due to mechanical vibration during the transportation of the battery cell, thereby protecting the battery cell and further facilitating the service life of the energy storage device.
  • the energy storage device can be a square battery or a cylindrical battery.
  • the lower plastic part 10 can be a rectangular plate-like structure, that is, the first surface 11 and the second surface 12 are actually two surfaces of the lower plastic part 10 along its own thickness direction (i.e., the Z direction in Figures 1 and 2), and the protrusion 12a can also be set as a long strip protrusion, and its length direction can be consistent with the length direction of the lower plastic part 10 (i.e., the X direction in Figures 1 and 2), or, the length direction of the protrusion 12a can be consistent with the width direction of the lower plastic part 10 (i.e., the Y direction in Figures 1 and 2), which will be explained below.
  • the lower plastic part 10 further includes a first side surface 13 and a second side surface 14 opposite to the first side surface 13 , and the first side surface 13 and the second side surface 14 are both connected to the first surface 11 and the second surface 12 . That is, the first side surface 13 and the second side surface 14 may be two surfaces of the lower plastic part 10 along its own width direction.
  • the side of the raised portion 12a that is away from the second surface 12 is the third surface 121
  • the raised portion 12a further includes a third side surface 122 and a fourth side surface 123 opposite to the third side surface 122
  • the third side surface 122 and the fourth side surface 123 are connected to the third surface 121
  • the third side surface 122 is flush with the first side surface 13
  • the fourth side surface 123 is flush with the second side surface 14 .
  • the third side surface 122 and the fourth side surface 123 are two surfaces of the raised portion 12a along the width direction of the lower plastic
  • the third side surface 122 and the fourth side surface 123 are flush with the first side surface 13 and the fourth side surface 123 of the lower plastic part 10 , respectively.
  • the design of the second side surface 14, on the one hand, can make the lower plastic part 10 remain flat on the first side surface 13 and the second side surface 14, that is, the raised portion 12a and the lower plastic part 10 remain flat on the first side surface 13 and the second side surface 14, which is convenient for connecting the lower plastic part 10 with other components of the energy storage device (such as the mylar film).
  • the third side surface 122 and the fourth side surface 123 can also be used to increase the surface area of the first side surface 13 and the second side surface 14, thereby increasing the connection area between the lower plastic part 10 and other components of the energy storage device (such as the mylar film), thereby improving the connection reliability and connection stability between the lower plastic part 10 and other components of the energy storage device.
  • the top cover assembly when the top cover assembly is applied to an energy storage device, generally speaking, the top cover assembly will be connected to the shell of the energy storage device, and the shell of the energy storage device contains a battery cell, and the outer periphery of the battery cell is usually covered with a mylar film.
  • the mylar film can be connected to the lower plastic part 10 so that the mylar film can be fixed by the lower plastic part 10 to prevent it from falling off from the outer periphery of the battery cell.
  • the connection method between the mylar film and the lower plastic part 10 may include but is not limited to, for example, a snap connection and a hot melt connection.
  • the third side 122 and the fourth side 123 of the protrusion 12a can increase the surface area of the first side 13 and the second side 14 of the lower plastic part 10 respectively, thereby increasing the connection area with the mylar film, making the connection between the mylar film and the lower plastic part 10 more reliable.
  • the protrusion 12 a further includes a fifth side surface 124 and a sixth side surface 125 along the length direction of the lower plastic component 10 .
  • the sixth side surface 125 is disposed opposite to the fifth side surface 124 , and both the fifth side surface 124 and the sixth side surface 125 are connected to the third side surface 122 and the fourth side surface 123 .
  • the fifth side surface 124 and the sixth side surface 125 are two surfaces along the length direction of the lower plastic part 10
  • the lower plastic part 10 is usually provided with an adapter for connecting with the pole of the top cover assembly and the pole ear on the battery cell in the length direction
  • the distance between the fifth side surface 124 and the sixth side surface 125 may be smaller than the distance between the third side surface 122 and the fourth side surface 123, that is, for the protrusion 12a, its length direction is along the width direction of the lower plastic part 10, while the width direction of the protrusion 12a is along the length direction of the lower plastic part 10.
  • the protrusion height from the protrusion 12a to the second surface 12 is h1, and the distance between the first surface 11 and the second surface 12 is h2 (i.e., the thickness of the lower plastic part 10 itself), then 1.5 ⁇ h1/h2 ⁇ 6. It is much larger than the thickness of the lower plastic part 10 itself. This is based on the fact that when the explosion-proof valve is set on the top cover body, it is closer to the first surface 11 of the lower plastic part 10. Therefore, the raised height of the raised part 12a is much larger than the thickness of the lower plastic part 10 itself.
  • the two to contact and short-circuit may also cause the two to contact and short-circuit, affecting the safety of the energy storage device. If h1/h2 is too large, the protruding height of the protrusion 12a is too large, and the protrusion 12a occupies more internal space of the energy storage device, resulting in that the internal space of the energy storage device cannot be effectively utilized, affecting the energy density of the energy storage device.
  • h1/h2 may be 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, etc.
  • the shape and size of the vent hole 120 may be roughly matched with the shape and size of the explosion-proof valve.
  • the size of the vent hole 120 being matched with the size of the explosion-proof valve may mean that the size of the vent hole 120 is equal to or slightly larger than the size of the explosion-proof valve.
  • the shape of the vent hole 120 being matched with the shape of the explosion-proof valve may mean that the shape of the vent hole 120 is roughly the same as the shape of the explosion-proof valve.
  • the vent hole 120 may also be in the shape of a long strip, and the length direction of the vent hole 120 may be along the length direction of the lower plastic part 10, so that the length of the vent hole 120 can be set longer, and when the protrusion 12a contacts the battery cell of the energy storage device, the vent hole 120 is not easily blocked by the battery cell and the structure on the battery cell, thereby ensuring that the vent hole 120 can still guide the gas to the explosion-proof valve, so that the explosion-proof valve can achieve normal pressure relief.
  • vent hole 120 may be an oblong hole, and the vent hole 120 has an annular inner wall surface, and the annular inner wall surface includes a first wall surface 120a and a second wall surface 120b along its own length direction, and a third wall surface 120c and a fourth wall surface 120d along its own width direction.
  • the first wall surface 120a may be arranged adjacent to the fifth side surface 124
  • the second wall surface 120b may be arranged adjacent to the sixth side surface 125
  • the third wall surface 120c is arranged toward the third side surface 122
  • the fourth wall surface 120d is arranged toward the fourth side surface 123.
  • the distance from the first wall surface 120a to the fifth side surface 124, and the distance from the second wall surface 120b to the sixth side surface 125 are both smaller than the distance from the third wall surface 120c to the third side surface 122, and the distance from the fourth wall surface 120d to the fourth side surface 123.
  • the length of the vent hole 120 is slightly smaller than the width of the protrusion 12a, while the width of the vent hole 120 is significantly smaller than the length of the protrusion 12a.
  • the length of the vent hole 120 is made as large as possible, thereby further reducing the probability of the vent hole 120 being blocked when the protrusion 12a contacts the battery cell of the energy storage device.
  • the lower plastic part 10 disclosed in the first aspect of the present application is provided with a protrusion 12a on the second surface 12 of the lower plastic part 10, and a vent hole 120 having a shape and size roughly matching the shape and size of the explosion-proof valve is provided on the protrusion 12a, so that when the lower plastic part 10 is connected to the top cover body of the top cover assembly, the explosion-proof valve can be provided corresponding to the vent hole 120, and can at least partially correspond to the opening of the vent hole 120 located on the first surface 11, so that the explosion-proof valve is at least partially located in the opening of the vent hole 120 on the first surface 11, that is, the explosion-proof valve is just opposite to the vent hole 120.
  • the ventilation space of the vent hole 120 is large, and the gas generated by the battery cell of the energy storage device can be quickly, timely and effectively guided directly to the explosion-proof valve, so that the explosion-proof valve can normally release pressure, prevent gas from accumulating inside the energy storage device, and thereby improve the safety of the energy storage device.
  • the present application further discloses a top cover assembly 20, which includes a top cover body 21, an explosion-proof valve 22, and the lower plastic part 10 as described in the first aspect.
  • the top cover body 21 is provided with a through pressure relief hole 210, that is, the pressure relief hole 210 penetrates both sides of the top cover body 21 in the thickness direction, and the explosion-proof valve 22 is sealed in the pressure relief hole 210.
  • the first surface 11 of the lower plastic part 10 can be connected to the top cover body 21, and the vent 120 on the lower plastic part 10 is arranged corresponding to the pressure relief hole 210, so that when the explosion-proof valve 22 does not seal the pressure relief hole 210, the vent 120 can be connected to the pressure relief hole 210 along the through direction of the pressure relief hole 210, so that the vent 120 can be arranged corresponding to the explosion-proof valve 22, which is more conducive to the vent 120 directly guiding the airflow to the explosion-proof valve 22, ensuring the normal pressure relief of the explosion-proof valve 22.
  • the explosion-proof valve 22 has a fourth surface 220 facing the second surface 12 of the lower plastic part 10, and along the thickness direction of the top cover body 21 (the thickness direction of the top cover body 21 is consistent with the thickness direction of the lower plastic part 10), there is a distance between the fourth surface 220 and the side of the protrusion 12a that is away from the second surface 12 (that is, the third surface 121 of the protrusion 12a), that is, even if the explosion-proof valve 22 is arranged corresponding to the opening of the vent 120, there is a distance between the fourth surface 220 and the second surface 12, so when the battery cell of the energy storage device stops at the protrusion 12a, it actually stops at the third surface 121 of the protrusion 12a, and the battery cell is not easy to touch the explosion-proof valve 22, so that it can be ensured that during the use of the energy storage device, there is a distance between the battery cell and the explosion-proof valve 22, thereby ensuring that the gas can be discharged to the explosion-proof valve 22 Gather.
  • S1: S2 may be 1/19, 1/18, 1/17, 1/16, etc. Due to the provision of the vent hole 120 on the protruding portion 12a, and the explosion-proof valve 22 may be at least partially located in the vent hole 120, the vent hole 120 has a sufficient ventilation area.
  • the size of the explosion-proof valve 22 may be appropriately reduced, so that the aperture of the pressure relief hole 210 on the top cover body 21 may be correspondingly reduced, so that the corresponding area of the structural weakness of the top cover body 21 is reduced.
  • the problem of failure caused by the explosion-proof valve 22 being easily touched due to its oversized size can be reduced, which is conducive to improving the overall structural stability of the energy storage device.
  • an energy storage device 30 which may include a housing 31, a battery cell 32, and a top cover assembly 20 as described in the second aspect above.
  • the housing 31 may have an opening, so that the battery cell 32 can be loaded into the housing 31 through the opening to be accommodated in the housing 31.
  • the top cover body 21 of the top cover assembly 20 is connected to the housing 31 to seal the opening of the housing 31.
  • the lower plastic part 10 is located on the side of the top cover body 21 facing the inside of the housing 31, that is, the lower plastic part 10 is arranged toward the battery cell 32, and along the opening direction of the housing 31, the protrusion 12a may be located between the explosion-proof valve 22 and the battery cell 32.
  • the opening direction of the shell 31 is actually consistent with the through direction of the pressure relief hole 210 on the top cover body 21 .
  • the protrusion 12a By making the protrusion 12a on the lower plastic part 10 located between the explosion-proof valve 22 and the battery cell 32 in the opening direction of the housing 31, the protrusion 12a can be used to stop and limit the battery cell 32, preventing the battery cell 32 from touching the lower plastic part 10 during movement or expansion, thereby causing damage to the battery cell 32. At the same time, the protrusion 12a can also increase the distance between the battery cell 32 and the explosion-proof valve 22, so that the gas can be better guided to the explosion-proof valve 22 through the vent hole 120 of the protrusion 12a, thereby achieving normal pressure relief.
  • the battery cell 32 may include a top end 32a and a bottom end 32b disposed opposite to the top end 32a, the bottom end 32b of the battery cell 32 may be adjacent to the bottom of the housing 31, and the top end 32a of the battery cell 32 may be adjacent to the top of the housing 31, that is, the top end 32a of the battery cell 32 is adjacent to the opening of the housing 31.
  • the top end 32a may have a top end surface 320, and along the opening direction of the housing 31, the projection area of the explosion-proof valve 22 on the top end surface 320 is a first area 320a, and no insulating film is attached to the first area 320a.
  • the first area 320a is the area of the top surface 320 corresponding to the explosion-proof valve 22 .
  • An insulating film is not attached to a region 320 a , so that the insulating film can prevent the gas generated by the battery cell 32 from being blocked, so that the gas can be gathered through the first region 320 a and guided to the explosion-proof valve 22 .
  • the area of the top surface 320 other than the first area 320a may be the second area 320b, and the second area 320b may be affixed with an insulating film 3201.
  • the insulating film 3201 By affixing the insulating film 3201 to the areas other than the first area 320a of the top surface 320, other areas of the top surface 320 other than the first area 320a can be sealed, and the gas in these other areas cannot pass through, thereby making it easier for the gas to be concentrated in the first area 320a where the insulating film is not affixed, and thus more conducive to the explosion-proof valve 22 to achieve the pressure relief function.
  • the insulating film 3201 is attached to the second region 320b (the insulating film 3201 is shown in a filled cross-hatching manner in the figure), while the insulating film is not attached to the first region 320a.
  • the gas generated by the battery cell 32 can be gathered to the vent hole 120 on the protrusion 12a through the first region 320a, so as to be guided to the explosion-proof valve 22 through the vent hole 120.
  • the insulating film 3201 may include but is not limited to a blue film, an isolation film, and the like.
  • the battery cell 32 provided therein may include one or more.
  • the multiple battery cells 32 may be arranged in sequence along the width direction of the top cover body 21, and an air flow channel may be formed between two adjacent battery cells 32, the projection of the air flow channel on the top cover body 21 may be located on the explosion-proof valve 22, and the air flow channel is connected to the vent 120 and the inside of the housing 31.
  • the gas generated between the multiple battery cells 32 can be drained by the air flow channel, and then it is convenient to drain to the vent 120 to concentrate at the explosion-proof valve 22, which is conducive to the explosion-proof valve 22 to achieve the pressure relief function.
  • the present application further discloses an electrical device (not shown), which may include the energy storage device of the third aspect.
  • the electrical device may include but is not limited to a vehicle, an energy storage system, and an electronic product (such as a mobile phone, a laptop computer, a tablet computer, etc.).

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
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Abstract

本申请公开了一种下塑胶件、顶盖组件、储能装置及用电设备。下塑胶件应用于顶盖组件，顶盖组件包括顶盖本体及防爆阀，防爆阀设置于顶盖本体，下塑胶件包括第一表面和第二表面，第一表面用于设置于顶盖本体，第二表面与第一表面相背设置，第二表面凸设有凸起部，凸起部的背离第二表面的一面设有通气孔，通气孔贯通至第一表面，通气孔被配置为对应于防爆阀设置，以在防爆阀设置于所述顶盖本体时，沿顶盖本体的厚度方向上，防爆阀至少部分位于通气孔中。采用本申请的方案，通气孔的通气空间较大，能够快速且及时将储能装置的电芯产生的气体直接引导至防爆阀处，使得防爆阀能够正常泄压。

Description

下塑胶件、顶盖组件、储能装置及用电设备
相关交叉引用
本申请要求于2022年11月16日提交中国专利局、申请号为2022230493008、公开名称为“下塑胶件、顶盖组件、储能装置及用电设备”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本申请涉及电池装配技术领域，尤其涉及一种下塑胶件、顶盖组件、储能装置及用电设备。
背景技术
在电池的使用过程中，由于电池在过充、过放、短路或恶劣环境(高温高湿、高压低压环境)使用时，电池的温度上升并产生大量的气体，导致电池的内部压力增大，若不及时泄压，则可能导致电池发生爆炸。基于此，相关技术中，为了确保电池的安全性，多采用在电池的顶盖组件上开设泄压孔，并在泄压孔处设置防爆阀，当电池内部的压力达到阈值时，气体可以通过防爆阀进行泄压，以降低电池发生爆炸的危险。
然而，由于防爆阀和电池的电芯之间设置有顶盖组件的下塑胶件，在电池的内部产生大量气体聚集时，下塑胶件会阻碍气体向防爆阀流动，导致无法及时泄压。
发明内容
本申请实施例公开一种下塑胶件、顶盖组件、储能装置及用电设备，下塑胶件能够引导气体向防爆阀流动，从而有效提高电池的使用安全性。
为了实现上述目的，第一方面，本申请公开了一种下塑胶件，应用于顶盖组件，所述顶盖组件包括顶盖本体以及防爆阀，所述防爆阀设置于所述顶盖本体，所述下塑胶件包括：
第一表面，所述第一表面用于设置于所述顶盖本体；
第二表面，所述第二表面与所述第一表面相背设置，所述第二表面凸设有凸起部，所述凸起部的背离所述第二表面的一面设有通气孔，所述通气孔贯穿所述第一表面，所述通气孔被配置为对应于所述防爆阀设置，以在所述防爆阀设置于所述顶盖本体时，沿所述顶盖本体的厚度方向上，使所述防爆阀至少部分位于所述通气孔中。
通过在下塑胶件的第二表面设置凸起部，同时在凸起部上设置贯穿下塑胶件的第一表面的通气孔，利用该通气孔能够用于对应防爆阀设置，从而当防爆阀设置在顶盖本体上时，该防爆阀能够至少部分位于通气孔中，由此通气孔的通气空间较大，能够快速且及时将储能装置的电芯产生的气体直接引导至防爆阀处，使得防爆阀能够正常泄压。
此外，凸起部的设置，还能够在储能装置的电芯发生膨胀或移动时，对电芯起到抵止限位电芯的作用，使得下塑胶件自身和电芯之间能够形成缓冲空间，避免了电芯运输过程中由于机械振动导致下塑胶件碰撞震碎或割裂电芯上的极耳而对电芯造成损坏的情况，起到保护电芯的作用，进而有利于提高储能装置的使用寿命。
第二方面，本申请还公开了一种顶盖组件，该顶盖组件包括：
顶盖本体，所述顶盖本体上设有贯通的泄压孔；
防爆阀，所述防爆阀密封于所述泄压孔；以及
如上述第一方面所述的下塑胶件，所述通气孔沿所述泄压孔的贯通方向连通于所述泄压孔。
这样，通气孔沿泄压控的贯通方向连通于泄压孔，从而当防爆阀安装于泄压孔时，防爆阀可对应该通气孔且至少部分位于该通气孔中，从而更有利于通气孔直接引导气流至防爆阀处，确保防爆阀的正常泄压。
第三方面，本申请还公开了一种储能装置，该所述储能装置包括壳体、电芯以及如上述第二方面所述的顶盖组件，所述壳体具有开口，所述电芯容纳于所述壳体中，所述顶盖组件的所述顶盖本体连接于所述壳体以封盖所述开口，所述下塑胶件朝向所述电芯设置，沿所述壳体的开口方向上，所述凸起部位于所述防爆阀和所述电芯之间。
这样，利用凸起部可起到抵止限位电芯的作用，防止电芯在移动或膨胀过程中触碰到下塑胶件而导致电芯出现损伤的情况。同时，利用凸起部还能够增大电芯和防爆阀之间的间距，从而使得气体能够更好地经由凸起部的通 气孔处引流至防爆阀处，实现正常泄压。
第四方面，本申请还公开了一种用电设备，包括如上述第三方面所述的储能装置。具有该第三方面所述的储能装置的用电设备，其同样能够实现有效提高电池的使用安全性的有益效果。
与现有技术相比，本申请的有益效果在于：
通过在下塑胶件的第二表面设置凸起部，同时在凸起部上设置贯穿下塑胶件的第一表面的通气孔，利用该通气孔能够用于对应防爆阀设置，从而当防爆阀设置在顶盖本体上时，该防爆阀能够至少部分容纳于通气孔中，由此通气孔的通气空间较大，能够快速且及时将储能装置的电芯产生的气体直接引导至防爆阀处，使得防爆阀能够正常泄压。
此外，凸起部的设置，还能够在储能装置的电芯发生膨胀或移动时，对电芯起到抵止限位电芯的作用，使得下塑胶件自身和电芯之间能够形成缓冲空间，避免了电芯运输过程中由于机械振动导致下塑胶件碰撞震碎或割裂电芯上的极耳而对电芯造成损坏的情况，起到保护电芯的作用，进而有利于提高储能装置的使用寿命。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请的下塑胶件的结构示意图；
图2是图1的另一视角的示意图；
图3是图1中的A处的局部放大图；
图4是本申请的下塑胶件的侧视图；
图5是本申请的顶盖组件的结构示意图；
图6是图5的另一视角的示意图；
图7是本申请的顶盖组件的剖视图；
图8是本申请的储能装置的结构示意图；
图9是本申请的储能装置的内部剖视图；
图10是本申请的防爆阀投影在电芯上的结构示意图。
主要附图标记
10、下塑胶件；11、第一表面；12、第二表面；13、第一侧面；14、第二侧面；12a、凸起部；120、通气孔；120a、第一壁面；120b、第二壁面；120c、第三壁面；120d、第四壁面；121、第三表面；122、第三侧面；123、第四侧面；124、第五侧面；125、第六侧面；20、顶盖组件；21、顶盖本体；210、泄压孔；22、防爆阀；220、第四表面；30、储能装置；31、壳体；32、电芯；32a、顶端；32b、底端；320、顶端面；320a、第一区域；320b、第二区域；3201、绝缘膜。
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做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。
术语“安装”、“设置”、“设有”、“连接”、“相连”应做广义理解。例如，可以是固定连接，可拆卸连接，或整体式构造；可以是机械连接，或电连接；可以是直接相连，或者是通过中间媒介间接相连，又或者是两个装置、元件或组成部分之间内部的连通。对于本领域普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
此外，术语“第一”、“第二”等主要是用于区分不同的装置、元件或组成部分(具体的种类和构造可能相同也可能不同)，并非用于表明或暗示所指示装置、元件或组成部分的相对重要性和数量。除非另有说明，“多个”的含义为两个或两个以上。
下面将结合实施例和附图对本申请的技术方案作进一步的说明。
请一并参阅图1至图4，本申请公开了一种下塑胶件10，其可应用于储能装置的顶盖组件。其中，该储能装置可包括电池，该储能装置可为但不局限于圆柱电池、方形电池等。该顶盖组件可包括顶盖本体以及防爆阀，防爆阀设置于顶盖本体，以对储能装置的内部气体进行泄压，防止储能装置内部因气体聚集无法泄压而导致爆炸的安全事故。具体地，该下塑胶件10包括第一表面11以及第二表面12，当将下塑胶件10应用于顶盖组件时，该第一表面11可用于设置于顶盖本体。该第二表面12可与第一表面11相背设置，且第二表面12可凸设有凸起部12a。凸起部12a的背离第二表面12的一面设 有通气孔120，通气孔120自凸起部12a贯通至第一表面11，即，通气孔120依次贯穿凸起部12a、第二表面12、第一表面11，该通气孔120可被配置为对应于顶盖组件的防爆阀设置，以在防爆阀设置在顶盖本体上时，沿顶盖本体的厚度方向上，该防爆阀可至少部分位于该通气孔120中。
可见，通过在下塑胶的第二表面12设置凸起部12a，同时在凸起部12a上设置贯穿下塑胶件10的第一表面11的通气孔120，利用该通气孔120能够用于对应防爆阀设置，从而当防爆阀设置在顶盖本体上时，该防爆阀能够至少部分容纳于通气孔120中，由此通气孔120的通气空间较大，能够快速且及时将储能装置的电芯产生的气体直接引导至防爆阀处，使得防爆阀能够正常泄压。
进一步地，凸起部12a的设置，还能够在储能装置的电芯发生膨胀或移动时，起到抵止限位电芯的作用，使得下塑胶件10的第二表面12和电芯之间能够形成缓冲空间，避免了电芯运输过程中由于机械振动导致下塑胶件10碰撞震碎或割裂电芯上的极耳而对电芯造成损坏的情况，起到保护电芯的作用，进而有利于提高储能装置的使用寿命。
由前述可知，该储能装置可为方形电池或者是圆柱形电池。以该储能装置为方形电池为例，则该下塑胶件10可为长方形板状结构，即，第一表面11和第二表面12实际上是该下塑胶件10的沿其自身厚度方向(即图1、图2中的Z方向)上的两个表面，该凸起部12a可同样设置为长条状凸起，且其长度方向可与下塑胶件10的长度方向(即图1、图2中的X方向)一致，或者，该凸起部12a的长度方向可与下塑胶件10的宽度方向(即图1、图2中的Y方向)一致，以下将针对此进行说明。
如图1至图3所示，一些实施例中，该下塑胶件10还包括第一侧面13和与第一侧面13相背的第二侧面14，第一侧面13以及第二侧面14均连接于第一表面11和第二表面12。即，该第一侧面13、第二侧面14可为下塑胶件10的沿其自身宽度方向上的两个表面。凸起部12a的背离第二表面12的一面为第三表面121，凸起部12a还包括第三侧面122和与第三侧面122相背的第四侧面123，第三侧面122、第四侧面123连接于该第三表面121，且第三侧面122齐平于第一侧面13，第四侧面123齐平于第二侧面14。换言之，第三侧面122、第四侧面123为凸起部12a的沿下塑胶宽度方向上的两个表面，且第三侧面122和第四侧面123分别齐平于下塑胶件10的第一侧面13、 第二侧面14的设计，一方面能够使得下塑胶件10在第一侧面13、第二侧面14上整体保持平整，即使得凸起部12a和下塑胶件10在第一侧面13、第二侧面14上保持平整，便于下塑胶件10与储能装置的其他部件(例如mylar膜)的连接。另一方面，由于凸起部12a凸出该下塑胶件10设置，因此，第三侧面122、第四侧面123还能够用于增大第一侧面13、第二侧面14的表面积，从而能够增大下塑胶件10与储能装置的其他部件(例如mylar膜)的连接面积，进而提高下塑胶件10与储能装置的其他部件的连接可靠性和连接稳定性。
举例来说，当顶盖组件应用于储能装置时，通常来说，顶盖组件会和储能装置的壳体连接，而储能装置的壳体内部容纳有电芯，电芯外周通常包覆mylar膜，此时，可通过将mylar膜和下塑胶件10进行连接，使得mylar膜能够被下塑胶件10所固定，避免其从电芯的外周脱落。示例性的，mylar膜和下塑胶件10的连接方式可包括但不局限于例如扣合连接、热熔连接。不论是哪种连接方式，由于该凸起部12a的存在，且凸起部12a的第三侧面122、第四侧面123分别与第一侧面13、第二侧面14齐平，因此，凸起部12a的第三侧面122、第四侧面123能够分别增大下塑胶件10的第一侧面13、第二侧面14的表面积，从而增大与mylar膜的连接面积，使得mylar膜和下塑胶件10的连接更加可靠。
进一步地，该凸起部12a还包括沿下塑胶件10的长度方向上的第五侧面124和第六侧面125，该第六侧面125与第五侧面124相背设置，且第五侧面124、第六侧面125均连接于第三侧面122、第四侧面123。考虑到第五侧面124、第六侧面125为沿下塑胶件10的长度方向上的两个表面，而下塑胶件10的长度方向上通常还要设置用于与顶盖组件的极柱以及电芯上的极耳连接的转接件，因此，为了减少凸起部12a在下塑胶件10的长度方向上的空间占用，以对下塑胶件10上的转接件的设置预留足够位置，第五侧面124至第六侧面125之间的距离可小于第三侧面122至第四侧面123之间的距离，即，对于凸起部12a而言，其长度方向为沿着下塑胶件10的宽度方向，而凸起部12a的宽度方向则为沿着下塑胶件10的长度方向。
如图4所示，一些实施例中，该凸起部12a至第二表面12的凸起高度为h1，第一表面11至第二表面12之间的距离为h2(即下塑胶件10的自身厚度)，则1.5≤h1/h2≤6。由此可知，凸起部12a相对第二表面12的凸起高度 远大于该下塑胶件10的自身厚度，这是基于，防爆阀设置于顶盖本体时，其更靠近下塑胶件10的第一表面11，因此，设置凸起部12a的凸起高度远大于下塑胶件10的自身厚度，不仅能够兼顾储能装置具有良好的能量密度，而且还能够有效阻隔下塑胶件10自身和储能装置的电芯，杜绝了电芯与位于通气孔120中的防爆阀发生接触的可能，实现充分阻隔电芯和防爆阀，提高储能装置的使用安全性。若h1/h2过小的话，即，凸起部12a的凸出高度较小，则可能导致该凸起部12a不能充分隔开电芯和防爆阀，这样可能导致电芯与防爆阀接触，一方面容易导致气体流动至防爆阀处的阻力过大，影响防爆阀的正常开阀，另一方面还可能造成二者接触短路，影响储能装置的使用安全性。而若h1/h2过大，则凸起部12a的凸出高度过大，凸起部12a占用储能装置的内部空间较多，导致储能装置的内部空间无法被有效利用，影响储能装置的能量密度。
示例性的，h1/h2可为2、2.5、3、3.5、4、4.5、5、5.5等。
如图3所示，可选地，该通气孔120的形状、尺寸可大致与防爆阀的形状、尺寸相适配。通气孔120的尺寸与防爆阀的尺寸相适配可以是指：通气孔120的尺寸等于或者是略大于防爆阀的尺寸。而通气孔120的形状与防爆阀的形状相适配可以是指：通气孔120的形状大致与防爆阀的形状相同。通常来说，防爆阀为长条片状，则该通气孔120同样可为长条状，且该通气孔120的长度方向可沿着下塑胶件10的长度方向，从而，通气孔120的长度可以设置较长，在凸起部12a与储能装置的电芯接触时，通气孔120不容易被电芯以及电芯上的结构堵塞，从而确保通气孔120依然能够将气体引导至防爆阀处，使得防爆阀可实现正常泄压。
进一步地，该通气孔120可为腰圆形孔，该通气孔120具有环形内壁面，其环形内壁面包括沿其自身长度方向上的第一壁面120a、第二壁面120b，以及沿其自身宽度方向上的第三壁面120c、第四壁面120d，该第一壁面120a可临近第五侧面124设置，第二壁面120b可临近第六侧面125设置，而第三壁面120c朝向第三侧面122设置，第四壁面120d则朝向第四侧面123设置，由于该通气孔120的长度方向沿下塑胶件10的长度方向，因此，该第一壁面120a至第五侧面124的间距、以及第二壁面120b至第六侧面125的间距，均小于第三壁面120c至第三侧面122、以及第四壁面120d至第四侧面123的间距。
可见，通气孔120在凸起部12a上设置时，通气孔120的长度略小于该凸起部12a的宽度，而通气孔120的宽度明显小于凸起部12a的长度，这样，在确保凸起部12a的结构强度的同时，还使得通气孔120的长度尽可能做得比较大，由此在凸起部12a和储能装置的电芯接触时，进一步降低通气孔120被堵塞的几率。
本申请第一方面公开的下塑胶件10，通过在下塑胶件10的第二表面12设置凸起部12a，并在凸起部12a上设置形状、尺寸大致与防爆阀的形状、尺寸相适配的通气孔120，从而当下塑胶件10连接于顶盖组件的顶盖本体时，该防爆阀可对应于该通气孔120设置，且可至少部分对应着通气孔120的位于第一表面11上的开口，以使得防爆阀至少部分位于该通气孔120的于第一表面11上的开口中，即，防爆阀刚好正对着通气孔120，这样，通气孔120的通气空间较大，能够快速且及时有效地将储能装置的电芯产生的气体直接引导至防爆阀处，使得防爆阀能够正常泄压，防止气体聚集在储能装置内部，进而提高储能装置的使用安全性。
请参阅图5至图7，第二方面，本申请还公开了一种顶盖组件20，该顶盖组件20包括顶盖本体21、防爆阀22以及如上述第一方面所述的下塑胶件10。该顶盖本体21上设有贯通的泄压孔210，即，泄压孔210贯通顶盖本体21厚度方向上的两侧，该防爆阀22密封于泄压孔210。下塑胶件10的第一表面11可连接于该顶盖本体21，且该下塑胶件10上的通气孔120对应该泄压孔210设置，从而，当防爆阀22未密封该泄压孔210时，该通气孔120可沿泄压孔210的贯通方向连通于该泄压孔210，进而使得该通气孔120能够与防爆阀22对应设置，从而更有利于通气孔120直接引导气流至防爆阀22处，确保防爆阀22的正常泄压。
可选地，防爆阀22具有朝向下塑胶件10的第二表面12的第四表面220，沿顶盖本体21的厚度方向上(该顶盖本体21的厚度方向与下塑胶件10的厚度方向一致)，第四表面220至凸起部12a的背离第二表面12的一面(即凸起部12a的第三表面121)之间具有间距，即，即便该防爆阀22对应着该通气孔120的开口设置，但由于第四表面220至第二表面12之间具有间距，从而当储能装置的电芯抵止于凸起部12a时，实际上是抵止于凸起部12a的第三表面121时，电芯不易于触碰到防爆阀22，从而可以确保在储能装置使用过程中，电芯和防爆阀22之间具有间距，进而确保气体能够向防爆阀22处 聚集。
可选地，防爆阀22的第四表面220的表面积可为S1，该顶盖本体21的设有泄压孔210的表面的表面积可为S2，S1：S2＝1/20-1/15。示例性的，S1：S2可为1/19、1/18、1/17、1/16等。由于该凸起部12a上的通气孔120的设置，且防爆阀22至少部分可位于通气孔120，因此，该通气孔120具有足够的通气面积，在这种情况下，该防爆阀22的尺寸可适当减小，从而顶盖本体21上的泄压孔210的孔径可相应减小，使得顶盖本体21的结构薄弱处对应的面积减小，在储能装置安装时，可以降低因防爆阀22尺寸过大而容易被触碰导致失效的问题，有利于提高储能装置的整体结构稳定性。
请参阅图8至图10，第三方面，本申请还公开了一种储能装置30，该储能装置30可包括壳体31、电芯32以及如上述第二方面所述的顶盖组件20。具体地，该壳体31可具有开口，从而电芯32可通过该开口装入壳体31以容纳于壳体31中。该顶盖组件20的顶盖本体21连接于壳体31以封盖壳体31的开口。下塑胶件10位于顶盖本体21的朝向壳体31内部的一侧，即，下塑胶件10朝向电芯32设置，且沿壳体31的开口方向上，该凸起部12a可位于防爆阀22和电芯32之间。
可以理解的是，该壳体31的开口方向上实际上与顶盖本体21上的泄压孔210的贯通方向一致。
通过使得下塑胶件10上的凸起部12a在壳体31的开口方向上位于防爆阀22和电芯32之间，从而利用凸起部12a可起到抵止限位电芯32的作用，防止电芯32在移动或膨胀过程中触碰到下塑胶件10而导致电芯32出现损伤的情况。同时，利用凸起部12a还能够增大电芯32和防爆阀22之间的间距，从而使得气体能够更好地经由凸起部12a的通气孔120处引流至防爆阀22处，实现正常泄压。
如图9和图10所示，可选地，电芯32可包括顶端32a以及与顶端32a相背设置的底端32b，该电芯32的底端32b可临近壳体31的底部，而电芯32的顶端32a则可临近壳体31的顶部，即，电芯32的顶端32a靠近壳体31的开口。该顶端32a可具有顶端面320，沿壳体31的开口方向上，防爆阀22在顶端面320上的投影区域为第一区域320a，该第一区域320a上未贴设绝缘膜。
由于第一区域320a为顶端面320的对应防爆阀22的区域，因此，在第 一区域320a上未贴设绝缘膜，可以避免绝缘膜阻隔电芯32产生的气体，使得气体能够经由该第一区域320a处汇聚并引流至防爆阀22处。
进一步地，顶端面320的除第一区域320a之外的区域可为第二区域320b，第二区域320b则可贴设绝缘膜3201。采用在顶端面320的除了第一区域320a之外的区域均贴设绝缘膜3201，从而能够封盖顶端面320的除第一区域320a之外的其他区域，而这些其他区域气体无法通过，由此使得气体更容易集中至未贴设绝缘膜的第一区域320a进行汇聚，进而更有利于防爆阀22实现泄压功能。
例如，如图10所示，图中示出了在第二区域320b上贴设绝缘膜3201(图中用填充剖面线方式示出该绝缘膜3201)，而第一区域320a未贴设绝缘膜的情况。从图10中可知，电芯32产生的气体可经由通过第一区域320a汇聚至凸起部12a上的通气孔120处，以实现通过通气孔120引流至防爆阀22处。
可选地，该绝缘膜3201可包括但不局限于蓝膜、隔离膜等。
可选地，本申请的储能装置30中，其设置的电芯32可包括一个或多个。当电芯32包括多个时，多个电芯32可沿着顶盖本体21的宽度方向依次排列，且相邻的两个电芯32之间可形成气流通道，该气流通道在顶盖本体21上的投影可位于防爆阀22上，且该气流通道连通于通气孔120和壳体31的内部。由此，可以使得多个电芯32之间产生的气体能够被气流通道进行引流，进而便于引流至通气孔120以集中至防爆阀22处，有利于防爆阀22实现泄压功能。
第四方面，本申请还公开了一种用电设备(未图示)，该用电设备可包括上述第三方面的储能装置。具体地，该用电设备可包括但不局限于车辆、储能系统、电子产品(例如手机、笔记本电脑、平板电脑等)。
以上对本申请实施例公开的下塑胶件、顶盖组件、储能装置及用电设备进行了详细介绍，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下塑胶件、顶盖组件、储能装置及用电设备及其核心思想；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，本说明书内容不应理解为对本申请的限制。

Claims (12)

  1. 一种下塑胶件，其中，应用于顶盖组件，所述顶盖组件包括顶盖本体以及防爆阀，所述防爆阀设置于所述顶盖本体，所述下塑胶件包括：
    第一表面，所述第一表面用于设置于所述顶盖本体；
    第二表面，所述第二表面与所述第一表面相背设置，所述第二表面凸设有凸起部，所述凸起部的背离所述第二表面的一面设有通气孔，所述通气孔贯通至所述第一表面，所述通气孔被配置为对应于所述防爆阀设置，以在所述防爆阀设置于所述顶盖本体时，沿所述顶盖本体的厚度方向上，使所述防爆阀至少部分位于所述通气孔中。
  2. 根据权利要求1所述的下塑胶件，其中，所述凸起部自所述第二表面的凸起高度为h1，所述第一表面至所述第二表面之间的距离为h2，1.5≤h1/h2≤6。
  3. 根据权利要求1所述的下塑胶件，其中，所述下塑胶件还包括第一侧面和与所述第一侧面相背的第二侧面，所述第一侧面以及所述第二侧面均连接于所述第一表面和所述第二表面；
    所述凸起部背离所述第二表面的一面为第三表面，所述凸起部还包括第三侧面和与所述第三侧面相背的第四侧面，所述第三侧面、所述第四侧面连接于所述第三表面，所述第三侧面齐平于所述第一侧面，所述第四侧面齐平于所述第二侧面。
  4. 根据权利要求3所述的下塑胶件，其中，所述通气孔为长条孔，所述通气孔的长度方向沿所述下塑胶件的长度方向。
  5. 一种顶盖组件，其中，所述顶盖组件包括：
    顶盖本体，所述顶盖本体上设有贯通的泄压孔；
    防爆阀，所述防爆阀密封于所述泄压孔；以及
    如权利要求1-4任一项所述的下塑胶件，所述通气孔沿所述泄压孔的贯通方向连通于所述泄压孔。
  6. 根据权利要求5所述的顶盖组件，其中，所述防爆阀具有邻近所述下塑胶件的所述第二表面的第四表面，沿所述顶盖本体的厚度方向上，所述第四表面至所述凸起部的背离所述第二表面的一面之间具有间距。
  7. 根据权利要求5或6所述的顶盖组件，其中，所述防爆阀的表面积为S1，所述顶盖本体的设有所述泄压孔的表面的表面积为S2，S1：S2＝1/20-1/15。
  8. 一种储能装置，其中，所述储能装置包括壳体、电芯以及如权利要求5-7 任一项所述的顶盖组件，所述壳体具有开口，所述电芯容纳于所述壳体中，所述顶盖组件的所述顶盖本体连接于所述壳体以封盖所述开口，所述下塑胶件朝向所述电芯设置，沿所述壳体的开口方向上，所述凸起部位于所述防爆阀和所述电芯之间。
  9. 根据权利要求8所述的储能装置，其中，所述电芯包括顶端和与所述顶端相背设置的底端，所述顶端靠近所述壳体的开口，所述顶端具有顶端面，沿所述壳体的开口方向上，所述防爆阀在所述顶端面上的投影区域为第一区域，所述第一区域未贴设绝缘膜。
  10. 根据权利要求9所述的储能装置，其中，所述顶端面的除所述第一区域之外的区域为第二区域，所述第二区域贴设有绝缘膜。
  11. 根据权利要求9所述的储能装置，其中，所述电芯为多个，多个所述电芯沿所述顶盖本体的宽度方向依次排列，相邻的两个所述电芯之间形成气流通道；
    所述气流通道在所述顶盖本体上的投影位于所述防爆阀上，且所述气流通道连通于所述通气孔和所述壳体的内部。
  12. 一种用电设备，其中，包括如权利要求9-11任一项所述的储能装置。
PCT/CN2023/132111 2022-11-16 2023-11-16 下塑胶件、顶盖组件、储能装置及用电设备 WO2024104442A1 (zh)

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