WO2023005470A1 - 防爆阀和电池包 - Google Patents

防爆阀和电池包 Download PDF

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Publication number
WO2023005470A1
WO2023005470A1 PCT/CN2022/098579 CN2022098579W WO2023005470A1 WO 2023005470 A1 WO2023005470 A1 WO 2023005470A1 CN 2022098579 W CN2022098579 W CN 2022098579W WO 2023005470 A1 WO2023005470 A1 WO 2023005470A1
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Prior art keywords
explosion
proof valve
hole
fireproof net
hole area
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PCT/CN2022/098579
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English (en)
French (fr)
Inventor
陈许超
张海建
唐丽娟
杨振宇
张巧然
Original Assignee
蜂巢能源科技股份有限公司
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Application filed by 蜂巢能源科技股份有限公司 filed Critical 蜂巢能源科技股份有限公司
Priority to DE212022000184.2U priority Critical patent/DE212022000184U1/de
Publication of WO2023005470A1 publication Critical patent/WO2023005470A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/383—Flame arresting or ignition-preventing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/14—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member
    • F16K17/16—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs
    • 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 power batteries, in particular, to an explosion-proof valve and a battery pack.
  • the explosion-proof valve in the related art realizes the fire filtering function through the fireproof net, but it is difficult to ensure sufficient fire filtering ability, and cannot meet the high-intensity thermal runaway requirements, and flames will be ejected from the battery pack. Therefore, how to prevent flames from spraying out of the battery pack, and its fire filter structure has become one of the safety design hotspots of the battery pack.
  • the purpose of the present application is to provide an explosion-proof valve and a battery pack to at least partly solve the problems existing in the related art.
  • the application provides an explosion-proof valve, which includes an explosion-proof valve body, a gas-permeable membrane, a second fireproof net and a first fireproof net that are stacked in sequence along the Z direction, and the first fireproof net is provided with A first through-hole area with a plurality of first through-holes, the second through-hole area with a plurality of second through-holes is provided on the second fireproof net, and the first through-hole area and the second through-hole The zones are formed with gaps in the Z direction.
  • the overlapping area of each of the first through holes and the corresponding second through holes is no more than 70% of the area of any one of them.
  • neither the first through hole nor the second through hole has an area greater than 4mm 2 .
  • a first installation part is formed at the edge of the first fireproof net along the X direction, and the first installation part is staggered with the first through hole area along the Z direction, and the second fireproof net is arranged along the Z direction.
  • a second mounting portion is formed at the edge in the X direction, and the second mounting portion is flush with the second through hole area in the Z direction.
  • a support plate extending toward the Z direction of the plane where the first installation part is located is formed at the edge of the first through hole area along the Y direction, and the length of the support plate in the Z direction is smaller than that of the first through hole area
  • the Z-direction staggered distance from the first installation part is 1mm-2mm.
  • both ends of the support plate along the X direction are respectively spaced apart from the first installation portion, and a relief portion is formed between the support plate and the first installation portion.
  • the surface of the first installation part is attached to the surface of the second installation part.
  • a first welding hole is provided on the first installation part
  • a second welding hole is provided on the second installation part corresponding to the position of the first welding hole
  • a second welding hole is formed on the second installation part
  • the gap between the first through hole area and the second through hole area in the Z direction is not less than 5mm.
  • a battery pack including the explosion-proof valve described above.
  • the first fireproof net and the second fireproof net are set on the explosion-proof valve at the same time, and the gap between the first fireproof net and the second fireproof net is set at the same time, so that when solid particles are sprayed out of the second fireproof net, it can be intercepted by the first fireproof net.
  • Part of the solid particles are left in the gap between the first fire screen and the second fire screen to reduce the ejection of solid particles, which can more effectively improve the fire filtering performance of the explosion-proof valve compared with the traditional single-layer fire screen. Thereby improving the safety performance of the battery pack.
  • Fig. 1 is a schematic diagram of an explosion-proof valve according to an embodiment of the present application.
  • Fig. 2 is a schematic diagram of a first fire protection net in an explosion-proof valve according to an embodiment of the present application.
  • Fig. 3 is a front view of a second fire screen in an explosion-proof valve according to an embodiment of the present application.
  • Fig. 4 is a front view of the first fireproof net and the second fireproof net installed together in the explosion-proof valve according to an embodiment of the present application.
  • Fig. 5 is a side view of the first fireproof net and the second fireproof net installed together in the explosion-proof valve according to an embodiment of the present application.
  • Fig. 6 is a schematic diagram of an explosion-proof valve installed on an upper casing of a battery pack according to an embodiment of the present application.
  • the explosion-proof valve is set in a space rectangular coordinate system to describe its direction, and the explosion-proof valve is defined to have X direction, Y direction and Z direction perpendicular to each other, wherein the Z direction is the stacking direction of each component.
  • Direction that is, the height direction of the explosion-proof valve.
  • reference may be made to the directions of the coordinate axes marked in FIG. 2 .
  • the purpose of using terms such as "first” and “second” is to distinguish different components, and does not have sequence or importance.
  • the same reference numerals in different drawings denote the same or similar elements unless otherwise explained.
  • an explosion-proof valve which includes an explosion-proof valve body 4, a gas-permeable membrane 3, a second fire-proof net 2 and a first stacked explosion-proof valve along the Z direction.
  • a fireproof net 1 the first through hole area 11 with a plurality of first through holes 111 can be arranged on the first fireproof net 1
  • the second through hole 211 with a plurality of second through holes can be arranged on the second fireproof net 2.
  • the through hole area 21 and a gap is formed between the first through hole area 11 and the second through hole area 21 in the Z direction.
  • the first fireproof net 1 and the second fireproof net 2 are set on the explosion-proof valve at the same time, and the gap between the first fireproof net 1 and the second fireproof net 2 is set so that when solid particles are ejected from the second fireproof net 2, the first fireproof net will pass through the first fireproof net.
  • the interception of the net 1 can keep part of the solid particles in the gap between the first fire net 1 and the second fire net 2, and reduce the ejection of solid particles.
  • the explosion-proof valve can be more effectively improved. Excellent fire filtering performance, thereby improving the safety performance of the battery pack.
  • the material of the first fireproof net 1 and the second fireproof net 2 can be stainless steel, and the thickness needs to be greater than 0.5mm, so as to ensure the strength of the first fireproof net 1 and the second fireproof net 2, the stainless steel material is durable Corrosion and high temperature resistance are good, which can effectively prevent the collapse of the first fireproof net 1 and the second fireproof net 2 when the battery pack is thermally out of control.
  • the first fireproof net 1 and the second fireproof net 2 The material can also be other corrosion-resistant and high-temperature-resistant materials, which is not limited in this application.
  • each first through hole 111 and the corresponding second through hole 211 is no more than 70% of the area of either of them.
  • This arrangement can On the basis of the above scheme, more solid particles can be more effectively intercepted between the first fireproof net 1 and the second fireproof net 2 to improve the fire filtering performance of the explosion-proof valve. At the same time, it can also prevent the explosion-proof valve from being blocked by the melt produced by thermal runaway, which affects the ventilation performance.
  • each first through hole 111 is a parallelogram arranged laterally (almost along the X direction).
  • each second through hole 211 is a parallelogram arranged vertically (almost along the Y direction).
  • This shape can effectively improve the misalignment rate between the two layers of through holes, but in other implementations of the present application
  • the shape of the first through hole 111 and the second through hole 211 is not limited to parallelogram, for example, the first through hole 111 and the second through hole 211 can be circular, rectangular, trapezoidal, polygonal and other irregular shapes. Shape, this application does not make any limitation to this.
  • the areas of the first through hole 111 and the second through hole 211 are not greater than 4 mm 2 , and the areas of the first through hole 111 and the second through hole 211 are set within this range to ensure Keep solid particles in the battery pack as much as possible without affecting the smooth discharge of gas.
  • each first through hole 111 or among the second through holes 211 can be kept consistent, so as to reduce costs during mold making and mass production.
  • the size of the edge of the first through hole area 11 may be too small.
  • the size of the first through hole 111 at the edge may be Appropriately shrink to prevent the edge of the battery pack from being broken when thermal runaway occurs.
  • a first installation part 12 may be formed at the edge of the first fireproof net 1 along the X direction, and the first installation part 12 may be aligned with the first installation part 12 along the Z direction.
  • the through-hole areas 11 are arranged in a staggered manner, and a second installation part 22 may be formed at the edge of the second fireproof net 2 along the X direction, and the second installation part 22 is flush with the second through-hole area 21 in the Z direction.
  • the second fireproof net 2 has a planar structure, which is beneficial to suppress the deformation of the explosion-proof gas-permeable membrane 3 during vibration, reduce the fatigue damage of the gas-permeable membrane 3, and improve the reliability of the explosion-proof valve.
  • a support plate 13 extending toward the Z direction of the plane where the first mounting part 12 is located may be formed at the edge of the first through hole area 11 along the Y direction,
  • the length of the plate 13 in the Z direction is smaller than the distance between the first through hole area 11 and the first mounting part 12 in the Z direction, and the distance L from the edge of the support plate 13 in the Z direction to the plane where the first mounting part 12 is located may be 1mm-2mm. This distance is to avoid interference with the upper casing of the battery pack during installation, and this reserved space is designed for avoidance.
  • both ends of the support plate 13 along the X direction are respectively spaced apart from the first installation portion 12 , and a avoidance portion 14 is formed between the support plate 13 and the first installation portion 12 , used to avoid the upper case of the battery pack during installation.
  • the surface of the first installation part 12 is attached to the surface of the second installation part 22 to effectively enhance the welding strength.
  • the first mounting portion 12 may be provided with a first welding hole 121
  • the second mounting portion 22 may be provided with a second welding hole 221 corresponding to the position of the first welding hole 121
  • a groove 222 with an opening facing the first mounting portion 12 is formed on the second mounting portion 22
  • the second welding hole 221 may be disposed in the groove bottom of the groove 222 .
  • the welding method between the first mounting part 12 and the second mounting part 22 is fusion welding, and the solder is passed through the first welding hole 121 and the second welding hole 221, and then welding is performed, and the solder will melt in the groove 222, thereby ensuring The solder will not overflow the first fireproof net 1 and the second fireproof net 2 , and the surfaces of the first fireproof net 1 and the second fireproof net 2 can also be kept flush.
  • the gap between the first through-hole area 11 and the second through-hole area 21 in the Z direction is not less than 5 mm, ensuring that the gap between the first through-hole area 11 and the second through-hole area 21 is sufficient, so that The first fireproof net 1 can block more solid particles, and at the same time, the increased gap can also prevent the explosion-proof valve from being blocked by melt produced by thermal runaway, thereby improving the performance of the explosion-proof valve.
  • the present application also provides a battery pack, the battery pack includes the above-mentioned explosion-proof valve, and the battery pack has all the beneficial effects of the above-mentioned explosion-proof valve, which will not be repeated here.
  • any combination of various implementations of the present application can also be made, as long as they do not violate the idea of the present application, they should also be regarded as the content of the present application.

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

Abstract

本申请涉及一种防爆阀和电池包，其中，防爆阀包括沿Z向依次堆叠的防爆阀本体、透气膜、第二防火网以及第一防火网，第一防火网上设置有具有多个第一通孔的第一通孔区，第二防火网上设置有具有多个第二通孔的第二通孔区，且第一通孔区与第二通孔区在Z向形成有间隙。当电池包发生热失控时，电池包内会积聚大量气体与固体颗粒物，内部压力会急剧增加。当有固体颗粒物喷出第二防火网时，通过第一防火网的拦截，可以将部分固体颗粒物留在第一防火网和第二防火网的间隙中，减少固体颗粒物的喷出，可以更有效的提高防爆阀的滤火性能，进而提高电池包的安全性能。

Description

防爆阀和电池包
本申请要求在2021年07月28日提交中国专利局、申请号为202121743548.7、发明名称为“防爆阀和电池包”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及动力电池技术领域，具体地，涉及一种防爆阀和电池包。
背景技术
纯电动汽车作为新能源汽车的一种正在兴起，许多传动燃油车平台直接通过将发动机结构更换为动力电池包结构来将汽车动力源由燃油更换为电池。随着新能源补贴的下降，低成本的电池包设计成为各大电池厂研发设计的重点，但在考虑低成本的同时应首先确保安全性。在相关技术中，由于电池包的下壳体边梁高度较低，无法安装防爆阀，因此防爆阀只能安装于电池包的上壳体处。同时，相关技术中防爆阀通过防火网来实现滤火功能，但难以保证足够的滤火能力，无法满足高强度的热失控要求，会有火焰从电池包内喷出。因此如何防止火焰从电池包内喷出，其滤火结构成为电池包的安全设计热点之一。
发明内容
本申请的目的是提供一种防爆阀和电池包，以至少部分地解决相关技术中所存在的问题。
为了实现上述目的，本申请提供一种防爆阀，所述防爆阀包括沿Z向依次堆叠的防爆阀本体、透气膜、第二防火网以及第一防火网，所述第一防火网上设置有具有多个第一通孔的第一通孔区，所述第二防火网上设置 有具有多个第二通孔的第二通孔区，且所述第一通孔区与所述第二通孔区在Z向形成有间隙。
可选地，每个所述第一通孔与位置对应的所述第二通孔的重叠面积不大于两者中任一者的面积的70％。
可选地，所述第一通孔与所述第二通孔面积均不大于4mm 2。
可选地，所述第一防火网沿X向的边缘处形成有第一安装部，所述第一安装部沿Z向与所述第一通孔区错开设置，所述第二防火网沿X向的边缘处形成有第二安装部，所述第二安装部在Z向上与所述第二通孔区平齐。
可选地，所述第一通孔区沿Y向的边缘处形成有朝向所述第一安装部所在平面Z向延伸的支板，所述支板Z向长度小于所述第一通孔区与所述第一安装部Z向错开的距离，所述距离为1mm-2mm。
可选地，所述支板沿X向的两端分别间隔于所述第一安装部，所述支板与所述第一安装部之间形成为避让部。
可选地，所述第一安装部的表面贴合于所述第二安装部的表面。
可选地，所述第一安装部上设置有第一焊孔，所述第二安装部上对应与所述第一焊孔的位置设置有第二焊孔，所述第二安装部上形成有开口朝向所述第一安装部的凹槽，所述第二焊孔设置在所述凹槽的槽底中。
可选地，所述第一通孔区与所述第二通孔区在Z向上的间隙不小于5mm。
根据本申请的再一个方面，还提供一种电池包，包括根据以上所述的防爆阀。
通过上述技术方案，当电池包发生热失控时，电池包内会积聚大量气体与固体颗粒物，内部压力会急剧增加，当防爆阀泄压时，需要将电池包内产生的大量高温气体短时间内排出，同时尽可能的将固体颗粒物留在电池包内。防爆阀上同时设置第一防火网和第二防火网，同时第一防火网和 第二防火网间隙设置，使得当有固体颗粒物喷出第二防火网时，通过第一防火网的拦截，可以将部分固体颗粒物留在第一防火网和第二防火网的间隙中，减少固体颗粒物的喷出，这相比于传统技术上的单层防火网可以更有效的提高防爆阀的滤火性能，进而提高电池包的安全性能。
本申请的其他特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图用于提供对本申请的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本申请，但并不构成对本申请的限制。在附图中：
图1是根据本申请一种实施方式的防爆阀的示意图。
图2是根据本申请一种实施方式的防爆阀中，第一防火网的示意图。
图3是根据本申请一种实施方式的防爆阀中，第二防火网的主视图。
图4是根据本申请一种实施方式的防爆阀中，第一防火网和第二防火网安装在一起后的主视图。
图5是根据本申请一种实施方式的防爆阀中，第一防火网和第二防火网安装在一起后的侧视图。
图6是根据本申请一种实施方式的防爆阀安装于电池包上壳体上的示意图。
附图标记说明
1-第一防火网；11-第一通孔区；111-第一通孔；12-第一安装部；121-第一焊孔；13-支板；14-避让结构；2-第二防火网；21-第二通孔区；211-第二通孔；22-第二安装部；221-第二焊孔；222-凹槽；3-透气膜；4-防爆阀本体。
具体实施方式
以下结合附图对本申请的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请，并不用于限制本申请。
在本申请中，为方便描述，将防爆阀设置于空间直角坐标系中进行对其方向的描述，定义防爆阀具有相互垂直的X方向、Y方向和Z方向，其中Z方向为各部件堆叠的方向，也即防爆阀的高度方向。具体地，可以参考图2中所标识的坐标轴方向。本申请在未作相反说明的情况下，使用的术语“第一”、“第二”等词的目的在于区分不同的部件，并不具有顺序性和重要性。此外，在下面的描述中，当涉及到附图时，除非另有解释，不同的附图中相同的附图标记表示相同或相似的要素。
根据本申请的一种实施方式，如图1至图3所示，提供一种防爆阀，该防爆阀包括沿Z向依次堆叠的防爆阀本体4、透气膜3、第二防火网2以及第一防火网1，第一防火网1上可以设置有具有多个第一通孔111的第一通孔区11，第二防火网2上可以设置有具有多个第二通孔211的第二通孔区21，且第一通孔区11与第二通孔区21在Z向形成有间隙。
通过上述技术方案，当电池包发生热失控时，电池包内会积聚大量气体与固体颗粒物，内部压力会急剧增加，当防爆阀泄压时，需要将电池包内产生的大量高温气体短时间内排出，同时尽可能的将固体颗粒物留在电池包内。防爆阀上同时设置第一防火网1和第二防火网2，且第一防火网1和第二防火网2间隙设置，使得当有固体颗粒物喷出第二防火网2时，通过第一防火网1的拦截，可以将部分固体颗粒物留在第一防火网1和第二防火网2的间隙中，减少固体颗粒物的喷出，相比于传统的单层防火网可以更有效的提高防爆阀的滤火性能，进而提高电池包的安全性能。
需要说明的是，第一防火网1和第二防火网2的材质均可以为不锈钢材质，且厚度需大于0.5mm，以保证第一防火网1和第二防火网2的强度，不锈钢材质耐腐蚀、耐高温性能好，可以有效防止电池包热失控时第一防火网1和第二防火网2发生崩坏，在本申请其他实施例中，第一防火网1和第二防火网2的材质也可以使其他耐腐蚀耐高温材料，本申请对此不做 任何限定。
可选地，如图2-图4所示，每个第一通孔111与位置对应的第二通孔211的重叠面积不大于两者中任一者的面积的70％，此种设置可以在上述方案的基础上更有效的将更多的固体颗粒物拦截在第一防火网1和第二防火网2之间提高防爆阀的滤火性能。同时也能避免防爆阀被热失控产生的熔融物封堵防爆阀影响透气性能。
需要说明的是，在本实施例中，如图3和图4所示，第一通孔区11中，每个第一通孔111均为横向(大体沿X方向)设置的平行四边形，在第二通孔区21中，每个第二通孔211均为纵向(大体沿Y方向)设置的平行四边形，此种形状可以有效提升两层通孔间的错位率，但在本申请其他实施例中，第一通孔111和第二通孔211的形状并不限定于平行四边形，例如，第一通孔111和第二通孔211可以为圆形、矩形、梯形、多边形以及其他不规则形状，本申请对此不做任何限定。
由于在电池包发生热失控时，所产生的大部分燃烧的固体颗粒物无法通过4mm 2的孔隙。因此，根据本申请的一种实施方式，第一通孔111与第二通孔211面积均不大于4mm 2，第一通孔111与第二通孔211面积设定在该范围内，以保证尽可能的将固体颗粒物留在电池包内同时又不影响气体顺利排出。
需要说明的是，在本申请的实施方式中，每个第一通孔111之间或第二通孔211之间可以保持大小形状一致，以便于模具制作及大批量生产时降低成本。在第一通孔区11中，根据第一通孔111的大小及排布而在第一通孔区11边缘处会出现尺寸过小的情况，此时边缘处的第一通孔111尺寸可以适当缩小，以防止电池包发生热失控时边缘处被崩坏。
根据本申请的一种实施方式，如图2和图3所示，第一防火网1沿X向的边缘处可以形成有第一安装部12，第一安装部12可以沿Z向与第一通孔区11错开设置，第二防火网2沿X向的边缘处可以形成有第二安装部22，第二安装部22在Z向上与第二通孔区21平齐。第二防火网2为平面结构，有利于提高振动时抑制防爆透气膜3的变形，减少透气膜3的疲劳破坏，提升防爆阀的可靠性。
根据本申请的一种实施方式，如图2和图5所示，第一通孔区11沿Y 向的边缘处可以形成有朝向第一安装部12所在平面Z向延伸的支板13，支板13Z向长度小于第一通孔区11与第一安装部12Z向错开的距离，支板13的Z向边缘处到第一安装部12所在平面的距离L可以为1mm-2mm。该距离是为了避免安装过程中与电池包上壳体干涉，设计有该预留空间进行避让。
可选地，如图2、图5和图6所示，支板13沿X向的两端分别间隔于第一安装部12，支板13与第一安装部12之间形成为避让部14，用以在安装过程中避让电池包上壳体。
根据本申请的一种实施方式，如图5所示，第一安装部12的表面贴合于第二安装部22的表面，以有效增强焊接强度。
可选地，如图3和图5所示，第一安装部12上可以设置有第一焊孔121，第二安装部22上对应与第一焊孔121的位置设置有第二焊孔221，第二安装部22上形成有开口朝向第一安装部12的凹槽222，第二焊孔221可以设置在凹槽222的槽底中。第一安装部12和第二安装部22之间的焊接方式为熔焊，将焊料贯穿第一焊孔121和第二焊孔221，再进行焊接，焊料会熔化在凹槽222中，从而保证焊料不会溢出第一防火网1与第二防火网2，还能保持第一防火网1与第二防火网2表面齐平。
根据本申请的一种实施方式，第一通孔区11与第二通孔区21在Z向上的间隙不小于5mm，保证第一通孔区11与第二通孔区21中间空隙充足，使得第一防火网1可以阻拦更多固体颗粒物，同时，间隙增大也可以防止防爆阀被热失控产生的熔融物封堵，提高防爆阀的性能。
在上述方案的基础上，本申请还提供一种电池包，该电池包包括上述防爆阀，且该电池包具有上述防爆阀所有有益效果，这里不再赘述。
以上结合附图详细描述了本申请的优选实施方式，但是，本申请并不限于上述实施方式中的具体细节，在本申请的技术构思范围内，可以对本申请的技术方案进行多种简单变型，这些简单变型均属于本申请的保护范围。
此外，本申请的各种不同的实施方式之间也可以进行任意组合，只要其不违背本申请的思想，其同样应当视为本申请的内容。

Claims (10)

  1. 一种防爆阀，其特征在于，所述防爆阀包括沿Z向依次堆叠的防爆阀本体(4)、透气膜(3)、第二防火网(2)以及第一防火网(1)，所述第一防火网(1)上设置有具有多个第一通孔(111)的第一通孔区(11)，所述第二防火网(2)上设置有具有多个第二通孔(211)的第二通孔区(21)，且所述第一通孔区(11)与所述第二通孔区(21)在Z向形成有间隙。
  2. 根据权利要求1所述的防爆阀，其特征在于，每个所述第一通孔(111)与位置对应的所述第二通孔(211)的重叠面积不大于两者中任一者的面积的70％。
  3. 根据权利要求1所述的防爆阀，其特征在于，所述第一通孔(111)与所述第二通孔(211)面积均不大于4mm 2。
  4. 根据权利要求1所述的防爆阀，其特征在于，所述第一防火网(1)沿X向的边缘处形成有第一安装部(12)，所述第一安装部(12)沿Z向与所述第一通孔区(11)错开设置；
    所述第二防火网(2)沿X向的边缘处形成有第二安装部(22)，所述第二安装部(22)在Z向上与所述第二通孔区(21)平齐。
  5. 根据权利要求4所述的防爆阀，其特征在于，所述第一通孔区(11)沿Y向的边缘处形成有朝向所述第一安装部(12)所在平面Z向延伸的支板(13)，所述支板(13)Z向长度小于所述第一通孔区(11)与所述第一安装部(12)Z向错开的距离，所述距离为1mm-2mm。
  6. 根据权利要求5所述的防爆阀，其特征在于，所述支板(13)沿X向的两端分别间隔于所述第一安装部(12)，所述支板(13)与所述第一安装部(12)之间形成为避让部(14)。
  7. 根据权利要求4所述的防爆阀，其特征在于，所述第一安装部(12)的表面贴合于所述第二安装部(22)的表面。
  8. 根据权利要求7所述的防爆阀，其特征在于，所述第一安装部(12)上设置有第一焊孔(121)，所述第二安装部(22)上对应与所述第一焊孔(121)的位置设置有第二焊孔(221)，所述第二安装部(22)上形成有开口朝向所述第一安装部(12)的凹槽(222)，所述第二焊孔(221)设置在所述凹槽(222)的槽底中。
  9. 根据权利要求1所述的防爆阀，其特征在于，所述第一通孔区(11)与所述第二通孔区(21)在Z向上的间隙不小于5mm。
  10. 一种电池包，其特征在于，包括权利要求1-9中所述任意一项所述的防爆阀。
PCT/CN2022/098579 2021-07-28 2022-06-14 防爆阀和电池包 WO2023005470A1 (zh)

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