TWM532665U - Cell having double explosion proof valves and cover having double protective explosion proof valves thereof - Google Patents

Abstract

Cell having double explosion proof valves includes a shell, a core, a positive pole, a negative pole, a first cover and a second cover. The shell has a first opening and a second opening. The core is disposed the two openings. The first pole is disposed at the first opening and is electrically connected to the core. The second pole is disposed at the second opening and is electrically connected to the core. The first cover is disposed at the first opening and includes a first body and a first explosion proof film. The first body has a first top surface and a first bottom surface. The first body has a penetrated first explosion proof opening. The first bottom surface a first platform. The first explosion proof film is adhered to the first bottom surface. The second cover is disposed at the second opening and includes a second body and a second explosion proof film. The second body has a second top surface and a second bottom surface. The second body has a penetrated second explosion proof opening. The second bottom surface a second platform. The second explosion proof film is adhered to the second bottom surface.

Description

Double explosion-proof valve battery core and double protection explosion-proof valve cover body

The invention relates to the technical field of electric cells, in particular to a double explosion-proof valve battery core and a double protection explosion-proof valve cover body.

With the development of various energy technologies, the pursuit of more stable electrical energy storage devices has become the current direction of technological improvement. Due to its high stability, portability and wide application range, the battery has gradually become an important electric energy storage device. Therefore, the safety of the battery is more important.

In general, explosion-proof valves are installed in the cells to avoid internal short-circuits and external factors (serious impact or improper misuse) causing internal short circuits and causing battery explosion. At present, the explosion-proof valve of the battery core can only cause internal violent reaction to internal or external factors of the battery core, and the pressure is opened to the edge of the explosion. However, if a problem has occurred inside the battery core, it is impossible to eliminate the danger in time before further deterioration. In detail, when an abnormality occurs inside the battery, gas accumulates in the battery, and the inside of the battery is caused by a lack of process or external factors (impact or improper abuse), causing an internal short circuit to generate high temperature and a large amount of gas, when the internal pressure of the battery An explosion occurs when it is greater than the critical value of the explosion of the casing. The explosion-proof valve can instantly release the internal gas when the internal pressure of the battery is abnormal, so that the internal abnormality of the battery core is no longer deteriorated to generate high heat, and the heat dissipation of the diaphragm is prevented to prevent the explosion from occurring. However, the cell that has an abnormality does not prevent its deterioration.

However, there are still problems with the battery explosion-proof valve. For example, the explosion-proof valve cannot control the opening pressure or delay opening of the explosion-proof valve, and the internal thermal runaway of the diaphragm melting battery continues to generate high pressure and high heat until the housing explosion. In addition, since the inside of the cylindrical cell is filled with the pressure at both ends of the core of the core and is not rapidly transmitted to the other side, it is necessary for the battery to have a double-sided explosion-proof valve.

As described above, the present invention is to solve the present problem, and to provide a new type of explosion-proof valve with an accurate control of the opening of the explosion-proof valve and the abnormality of the battery core before the occurrence of an immediate danger.

According to an embodiment of the present invention, a double explosion-proof valve battery core includes a casing, at least one core, a positive pole, a negative pole, a first cover and a second cover. body. The housing has a first opening and a second opening. The winding core is disposed between the first opening of the housing and the second opening. The positive pole is located at the first opening. The positive pole is electrically connected to one of the cores of the core. The negative pole is located at the second opening. The pole is electrically connected to one of the cores of the core. The first cover body is disposed on the first opening of the housing, and the positive pole column is passed through the first cover body. The first cover body includes a first body and a first explosion-proof film. The first body has a first upper surface and a first lower surface. The first lower surface of the first body is configured to be mounted to the first opening of the housing. The first body has a first explosion vent. The first explosion vent extends from the first upper surface to the first lower surface. The first lower surface of the first body is provided with at least one first boss. The first boss is located inside the first explosion vent. The first explosion-proof membrane is attached to the first lower surface of the first body and is attached to the first explosion-proof opening. The second cover body is disposed on the second opening of the housing, and the negative pole pole is passed through the cover body. The second cover body includes a second body and a second explosion-proof film. The second body has a second upper surface and a second lower surface. The second lower surface of the second body is configured to be mounted to the second opening of the housing. The second body has a second explosion vent. The second explosion vent extends from the second upper surface to the second lower surface. The second lower surface of the second body is provided with at least one second boss. The second boss is located inside the second explosion vent. The second explosion-proof membrane is attached to the second lower surface of the second body and attached to the second explosion-proof opening.

In one embodiment, the first lower surface of the first body is provided with two first bosses, and the second lower surface of the second body is provided with two second bosses.

In one embodiment, the material of the first explosion-proof membrane and the second explosion-proof membrane is aluminum foil.

In an embodiment, the first boss and the second boss are a triangular column, a quadrangular column, a pentagonal column, a hexagonal column or a cylinder.

The double-protection explosion-proof valve cover body of the double explosion-proof valve battery according to an embodiment of the present invention is installed on a casing of a battery core. The double protection explosion-proof valve cover body comprises a body and an explosion-proof membrane. The body has an upper surface and a lower surface. The lower surface of the body is mounted on the housing of the double explosion-proof valve battery. The body has an explosion-proof port. The explosion-proof opening penetrates from the upper surface to the lower surface. The lower surface of the body is provided with at least one boss. The boss is located inside the explosion vent. The explosion-proof membrane is attached to the lower surface of the body.

In an embodiment, the lower surface of the body is provided with two bosses.

In one embodiment, the material of the explosion-proof membrane is aluminum foil.

In an embodiment, the boss is a triangular cylinder, a quadrangular prism, a pentagonal cylinder, a hexagonal cylinder or a cylinder.

According to the double explosion-proof valve battery core and the double-protection explosion-proof valve cover body disclosed in the above novel embodiment, since the present invention is explosion-proof through the explosion-proof membrane and the boss in the explosion-proof hole, the pressure inside the double explosion-proof valve battery is greater than At the critical pressure of the explosion-proof membrane design, the gas can break through the explosion-proof membrane and achieve the effect of releasing gas. In this way, the pressure inside the double explosion-proof valve battery can be avoided and the explosion is caused. Since the explosion-proof hole is provided with a boss, the double explosion-proof valve battery core can be pre-expanded by the boss in advance for the abnormal condition. The valve battery fails, and the internal reaction of the double explosion-proof valve battery is stopped, that is, the double explosion-proof valve battery core and the double-protection explosion-proof valve cover body of the present invention can truly achieve the explosion-proof and prevent the dangerous effect of the double explosion-proof valve battery from deteriorating.

The above description of the present invention and the following description of the embodiments are intended to illustrate and explain the principles of the present invention and to provide a further explanation of the scope of the invention.

The detailed features and advantages of the present invention are described in detail below in the embodiments, which are sufficient to enable anyone skilled in the art to understand the technical contents of the present invention and to implement the present invention. Any related art and related art can easily understand the related purposes and advantages of the present invention. The following examples are intended to describe the present invention in further detail, but do not limit the scope of the present invention in any way.

In the following description, the first, second, third, etc. words used are used to distinguish different elements, components, and regions in the drawings. These words are not intended to limit elements, components, or regions. That is, the first element, the first component, and the first region described may also be the second component, the second component, and the second region, without departing from the spirit and scope of the present proposal.

In the following description, the terms "upper, lower, left, right, and the like" are used to describe the relative relationship of the elements in the drawings. That is to say, without departing from the spirit and scope of this proposal, the stated statement A may also be above B.

First, please refer to FIG. 1 and FIG. 2. FIG. 1 is a schematic view showing the assembly of the double explosion-proof valve battery core according to an embodiment of the present invention, and FIG. 2 is an exploded view of the double explosion-proof valve battery core of FIG. As shown in the figure, the double explosion-proof valve battery 1 disclosed in the embodiment comprises a casing 10, at least one core 20, a positive pole 30, a negative pole 40, a first cover 50 and a first Two cover body 60. The double explosion-proof valve battery 1 disclosed in this embodiment can be applied to, for example, an electric vehicle.

The housing 10 has a first opening 11 and a second opening 12 opposite to each other. It should be noted that after the double explosion-proof valve battery 1 is assembled, the first opening 11 and the second opening 12 are shielded and sealed by the first cover 50 and the second cover 60.

The core 20 is disposed between the first opening 11 and the second opening 12 of the housing. In FIG. 2, the number of the cores 20 is exemplified by one, but is not limited thereto. In other embodiments, the number of cores 20 may also be multiple, and the plurality of cores may be in parallel.

The positive pole 30 is located on the first cover 50. The positive pole 30 is electrically connected to one of the cores 20 of the core 20 (not shown). In detail, the positive electrode post 30 and the winding core 20 of the present embodiment are connected to each other by means of welding. In the present embodiment, the shape of the first electrode 30 is matched to the outer shape of the casing 10, that is, in the shape of a disk. However, the user can also select other suitable shapes depending on the appearance of the housing 10.

The negative pole 40 is located on the second cover 60. The negative pole 40 is electrically connected to one of the cores of the core 20 (not shown). In detail, between the negative electrode post 40 and the winding core 20 of the present embodiment, the effect of joining is achieved by means of welding. In the present embodiment, the shape of the second electrode 40 is matched to the outer shape of the housing 10, that is, in the form of a disk. However, the user can also select other suitable shapes depending on the appearance of the housing 10. As described above, since the positive pole 30 and the negative pole 40 are respectively soldered to the positive and negative poles of the winding core 20, when the user connects the load to the positive pole 30 and the negative pole 40, respectively, a complete structure can be formed. The loop.

The first cover 50 is disposed at the first opening 11 of the housing 10. In detail, the positive pole 30 is located in the first cover 50. In this way, in addition to the first cover 50, the first cover 50 can achieve the effect of fixing the positive pole 30.

3 and FIG. 4A, FIG. 3 is a perspective view of the first cover of FIG. 1, and FIG. 4A is a cross-sectional view of FIG. 3 taken along line A-A'. As shown, the first cover 50 includes a first body 51 and a first explosion-proof membrane 52. In detail, the first body 51 has a first upper surface 511 and a first lower surface 512, wherein the first upper surface 511 is a side of the first body 51 facing the outer side of the double explosion-proof valve cell 1, and the first The lower surface 512 is the side that represents the interior of the first body 51 facing the double explosion-proof valve cell 1. The first lower surface 512 of the first body 51 is mounted on the first opening 11 of the housing 10 . The first body 51 has a first explosion-proof opening 513. The first explosion-proof opening 513 penetrates from the first upper surface 511 to the first lower surface 512. In the present embodiment, the inner diameter W _{O1 of the} first explosion-proof opening 513 on the first upper surface 511 is smaller than the inner diameter W _{I1 of the} first explosion-proof opening 513 on the first lower surface 512. The first lower surface 512 of the first body 51 is provided with a first boss 53 which is located inside the first explosion-proof opening 513. It should be noted that the explosion-proof valve referred to in the present case refers to the structure of the first body 51, the first explosion-proof membrane 52 and the first boss 53 in the first cover. The first explosion-proof membrane 52 is attached to the first lower surface 512 of the first body 51 via, for example, polyphthalamide. The first explosion-proof membrane 52 of the present invention is not combined with the first body 51 by conventional welding or stamping, but can avoid the breakdown of the explosion-proof membrane caused by the sand hole and the laser power caused by the laser welding film, or the power is insufficient and the laser cannot be accurately focused. Causes the virtual welding, so that the double explosion-proof valve battery hides the leakage (electrolyte) condition, the electrolyte is a strong acid leakage problem will lead to the corrosion of the surrounding facilities of the double explosion-proof valve battery, and the double explosion-proof valve battery itself will cause double The energy of the explosion-proof valve battery is rapidly degraded, and the failure of the battery of the double-explosion-proof valve causes the entire battery pack to fail. In this embodiment and some other embodiments, the first explosion-proof film 52 is made of aluminum foil. However, in other embodiments, the first explosion-proof film 52 may also use other suitable materials.

As described above, when the pressure inside the double explosion-proof valve battery 1 is greater than the critical pressure, the gas can break through the first explosion-proof membrane 52 to achieve the effect of releasing the gas, and the pressure inside the double explosion-proof valve battery 1 can be successfully avoided. High and explosive. In this embodiment and some other embodiments, the critical exhaust pressure of the first explosion-proof membrane 52 is determined by the size of the aluminum foil and the explosion-proof aperture, that is, when the pressure inside the double explosion-proof valve battery 1 is greater than or equal to the first explosion-proof When the critical pressure of the membrane 52 is designed, the gas can break through the first explosion-proof membrane 52 to release the gas, thereby avoiding the explosion of the double explosion-proof valve battery 1. On the other hand, the first boss 53 can quickly puncture the first explosion-proof membrane 52, so that when the abnormality or improper use of the interior of the double-explosion-proof valve battery 1 causes damage to the interior of the double-explosion-proof valve battery 1, the first explosion-proof membrane 52 is raised. The first explosion-proof membrane 52 can be puncture to disable the double explosion-proof valve battery 1 to avoid potential hazards.

The second cover 60 is disposed at the second opening 12 of the housing 10 . In detail, the negative electrode post 40 runs through the second cover 60. In this way, in addition to shielding and sealing the second opening 12, the second cover 60 can also achieve the effect of fixing the negative pole 40.

5 and FIG. 6A, FIG. 5 is a perspective view of the second cover of FIG. 1, and FIG. 6A is a cross-sectional view of FIG. 5 taken along line BB'. As shown, the second cover 60 includes a second body 61 and a second explosion-proof membrane 62. In detail, the second body 61 has a second upper surface 611 and a second lower surface 612, wherein the second upper surface 611 is a side of the second body 61 facing the outside of the double explosion-proof valve cell 1, and the second The lower surface 612 is a side that represents the interior of the second body 61 facing the double explosion-proof valve cell 1. The second lower surface 612 of the second body 61 is configured to be mounted on the second opening 12 of the housing 10 . The second body 61 has a second explosion vent 613. The second explosion vent 613 extends from the second upper surface 611 to the second lower surface 612. In the present embodiment, the inner diameter W _{O2 of the} second explosion-proof opening 613 on the second upper surface 611 is smaller than the inner diameter W _{I2 of the} second explosion-proof opening 613 on the second lower surface 612. The second lower surface 612 of the second body 61 is provided with at least one second boss 63. The second boss 63 is located inside the second explosion-proof port 613. It should be noted that the explosion-proof valve referred to in the present case refers to the structure of the first body 51, the first explosion-proof membrane 52 and the first boss 53 in the first cover. The second explosion-proof membrane 62 is attached to the second lower surface 612 of the second body 61 via, for example, polyphthalamide. The second explosion-proof membrane 62 of the present invention is not combined with the second body 61 by conventional welding or stamping, and can avoid the breakdown of the explosion-proof membrane caused by the sand hole and the laser power caused by the laser welding film, or the power is insufficient and the laser cannot be accurately focused. Causes the virtual welding, so that the double explosion-proof valve battery hides the leakage (electrolyte) condition, the electrolyte is a strong acid leakage problem will lead to the corrosion of the surrounding facilities of the double explosion-proof valve battery, and the double explosion-proof valve battery itself will cause double The energy of the explosion-proof valve battery is rapidly degraded, and the failure of the battery of the double-explosion-proof valve causes the entire battery pack to fail. In this embodiment and some other embodiments, the second explosion-proof film 62 is made of aluminum foil. However, in other embodiments, the second explosion-proof film 62 may also use other suitable materials.

As described above, when the pressure inside the double explosion-proof valve battery 1 is greater than the critical pressure, the gas can break through the second explosion-proof membrane 62 to achieve the effect of releasing the gas, and the pressure inside the double explosion-proof valve battery 1 can be successfully avoided. High and explosive. In this embodiment and some other embodiments, when the second explosion-proof membrane 62 is designed to have a critical exhaust pressure, the gas can break through the second explosion-proof membrane 62 to release the gas, thereby avoiding the explosion of the double explosion-proof valve battery 1. Similarly, the second boss 63 can quickly puncture the second explosion-proof membrane 62, so that when the abnormality or improper use of the interior of the double-explosion-proof valve battery 1 causes damage to the interior of the double-explosion-proof valve battery 1, the second explosion-proof membrane 62 is raised. The second explosion-proof membrane 62 can be puncture to disable the double explosion-proof valve battery 1 to avoid potential hazards.

As described above, since the present invention is provided with the first explosion-proof membrane 52 and the second explosion-proof membrane 62 for explosion-proof, when the pressure inside the double explosion-proof valve battery 1 is greater than the design critical pressure, the gas can break through the first explosion-proof membrane 52, The second explosion-proof membrane 62 can achieve the effect of releasing gas. Thereby, the double explosion-proof valve battery 1 of the present invention and the first cover body 50 and the second cover body 60 can successfully achieve the explosion-proof effect.

In more detail, the composition of the explosion-proof membrane and the boss of the present case has the effect of preventing an explosion caused by a violent reaction in the battery of the double explosion-proof valve. That is, the gas is discharged before the explosion to avoid thermal runaway caused by the repeated reaction of the double explosion-proof valve cells. In the case of a slight abnormality inside the double explosion-proof valve battery and the danger of the abnormality is not enlarged, the boss will break the explosion-proof membrane through the bulge to make the double explosion-proof valve battery fail in advance, making the use of the double explosion-proof valve battery safer.

Referring to FIG. 3 and FIG. 4A , in the embodiment and some other embodiments, the first lower surface 512 of the first body 51 is further provided with a first protrusion 53 . The shape of the first boss 53 is, for example but not limited to, a triangular prism, a quadrangular prism, a pentagonal cylinder, a hexagonal cylinder or a cylinder. The first boss 53 faces the first explosion-proof film 52. Thereby, during the process in which the pressure inside the double explosion-proof valve battery 1 is raised to cause the first explosion-proof membrane 52 to swell, once the first explosion-proof membrane 52 touches the first boss 53, the first explosion-proof membrane 52 is broken. It can release gas. In this way, it is further ensured that the first explosion-proof membrane 52 is broken when the critical pressure of the design is reached, and the safety of the double explosion-proof valve battery 1 can be further improved.

Referring to FIG. 5 and FIG. 6A , in the embodiment and some other embodiments, the second lower surface 612 of the second body 61 is further provided with a second protrusion 63 . The shape of the second boss 63 is, for example but not limited to, a triangular prism, a quadrangular prism, a pentagonal cylinder, a hexagonal cylinder or a cylinder. The second boss 63 faces the second explosion-proof film 62. Thereby, during the process in which the pressure inside the double explosion-proof valve battery 1 rises to cause the second explosion-proof membrane 62 to rise, once the second explosion-proof membrane 62 touches the second boss 63, the second explosion-proof membrane 62 is broken. It can release gas. In this way, it is further ensured that the second explosion-proof membrane 62 is broken when the critical pressure of the design is reached, and the safety of the double explosion-proof valve battery 1 can be further improved.

It should be noted that in the above embodiment, the first body 51 is provided with the first boss 53 and the second body 61 is also provided with the second boss 63, but the present invention is not limited thereto. In other embodiments, only the first boss 53 may be provided alone or the second boss 63 may be separately provided.

In addition, please refer to FIG. 4B and FIG. 6B , FIG. 4B is a schematic cross-sectional view of a double explosion-proof valve battery core according to another embodiment of the present invention, and FIG. 6B is a double explosion-proof valve battery core according to another embodiment of the present invention. Cutaway schematic. In this embodiment and some other embodiments, the first lower surface 512 of the first body 51 is provided with two first protrusions 53 , and the second lower surface 612 of the second body 61 is provided with two second protrusions 63 . Thereby, the corresponding first explosion-proof membrane 62 and the second explosion-proof membrane 62 can be quickly puncture, thereby avoiding dangers.

In addition, the double-explosion-proof valve battery core is provided with an explosion-proof membrane and a boss at both ends, so that the pressure accumulated inside the double explosion-proof valve core can be released through either side, so that it is safer to use.

According to the double explosion-proof valve battery core and the double-protection explosion-proof valve cover body disclosed in the above novel embodiment, since the new type is explosion-proof through the adhesive type explosion-proof membrane, the internal pressure of the double explosion-proof valve battery core is greater than the critical pressure of the explosion-proof membrane design. At this time, the gas can break through the explosion-proof membrane to achieve the effect of releasing the gas. In this way, the pressure inside the double explosion-proof valve battery can be avoided and the explosion can be avoided. In addition, in combination with the design of the boss, the explosion-proof membrane can be instantly punctured, and the double-explosion-proof valve core of the abnormality can be invalidated, and the thermal runaway of the double-explosion-proof valve cell is prevented. That is to say, the double explosion-proof valve core of the present invention and the double-protection explosion-proof valve cover body can surely achieve the effect of exposing the explosion-proof and preventing the double-explosion-proof valve battery core which has been mutated before the continuous deterioration does not occur, so that the double explosion-proof valve battery core The use is safer.

In addition, in some embodiments of the present invention, when a plurality of double explosion-proof valve batteries are assembled into a battery, the explosion-proof valves of the respective double explosion-proof valve batteries can also be connected through a pipeline to achieve a modular effect. In this way, the gas inside the explosion-proof valve can be uniformly discharged, thereby further improving the safety of the battery.

Although the embodiments of the present invention are disclosed as described above, it is not intended to limit the present invention, and those skilled in the art can, without departing from the spirit and scope of the present invention, the shapes, structures, and features described in the scope of the present application. And the spirit of the invention is subject to change. Therefore, the scope of patent protection of the present invention is subject to the definition of the scope of the patent application attached to this specification.

1‧‧‧Double explosion-proof valve cells
10‧‧‧shell
11‧‧‧ first opening
12‧‧‧ second opening
20‧‧‧Volume core
30‧‧‧positive pole
40‧‧‧Negative pole
50‧‧‧First cover
51‧‧‧First Ontology
511‧‧‧ first upper surface
512‧‧‧First lower surface
513‧‧‧First explosion-proof opening
52‧‧‧First explosion-proof membrane
53‧‧‧First boss
60‧‧‧Second cover
61‧‧‧Second ontology
611‧‧‧Second upper surface
612‧‧‧Second lower surface
613‧‧‧second explosion-proof opening
62‧‧‧Second explosion-proof membrane
63‧‧‧second boss

1 is a schematic view showing the assembly of a double explosion-proof valve battery core according to an embodiment of the present invention; FIG. 2 is an exploded perspective view of the double explosion-proof valve battery core of FIG. 1; FIG. 3 is a perspective view of the first cover body of FIG. 4A is a schematic cross-sectional view taken along line A-A' of FIG. 3; FIG. 4B is a schematic cross-sectional view of a double explosion-proof valve battery core according to another embodiment of the present invention; FIG. 5 is a perspective view of the second cover body of FIG. Figure 6A is a cross-sectional view taken along line BB' of Figure 5. 6B is a schematic cross-sectional view of a double explosion-proof valve battery core according to another embodiment of the present invention.

51‧‧‧First Ontology

511‧‧‧ first upper surface

512‧‧‧First lower surface

513‧‧‧First explosion-proof opening

52‧‧‧First explosion-proof membrane

53‧‧‧First boss

Claims (8)

A double explosion-proof valve battery core, comprising: a casing having a first opening and a second opening; at least one core disposed between the first opening and the second opening of the casing; a positive pole, located in the first opening, the positive pole is electrically connected to one of the cores of the core; a negative pole is located in the second opening, and the negative pole is electrically connected to one of the coils a first cover body is disposed in the first opening of the housing, and the positive pole column runs through the first cover body, the first cover body comprises: a first body having a first upper surface And a first lower surface, the first lower surface of the first body is configured to be mounted on the first opening of the housing, the first body has a first explosion-proof port, and the first explosion-proof port is from the first An upper surface penetrates the first lower surface, the first lower surface of the first body is provided with at least one first boss, the first boss is located inside the first explosion vent; and a first explosion-proof film Attaching to the first lower surface of the first body and attaching the first explosion-proof opening; And a second cover disposed on the second opening of the housing, wherein the negative pole colloids through the second cover, the second cover comprises: a second body having a second upper surface and a a second lower surface, the second lower surface of the second body is configured to be mounted on the second opening of the housing, the second body has a second explosion opening, and the second explosion opening is from the second The second lower surface of the second body is provided with at least one second protrusion, the second protrusion is located inside the second explosion-proof opening; and a second explosion-proof film is attached Attached to the second lower surface of the second body and attached to the second explosion vent. The double explosion-proof valve battery core according to claim 1, wherein the first lower surface of the first body is provided with two first bosses, and the second lower surface of the second body is provided with two second portions. Boss. The double explosion-proof valve battery core according to claim 1 or 2, wherein the first explosion-proof membrane and the second explosion-proof membrane are made of aluminum foil. The double explosion-proof valve battery according to claim 1 or 2, wherein the first boss and the second boss are a triangular column, a quadrangular column, a pentagonal column, a hexagonal column or a cylinder . The utility model relates to a double protection explosion-proof valve cover body of a double explosion-proof valve battery, which is arranged on a casing of a double explosion-proof valve battery core, comprising: a body having an upper surface and a lower surface, wherein the lower surface of the body is used for a casing mounted on the double explosion-proof valve battery, the body has an explosion-proof opening, the explosion-proof opening penetrates from the upper surface to the lower surface, and the lower surface of the body is provided with at least one boss, the boss is located An inner side of the explosion vent; and an explosion-proof film attached to the lower surface of the body. The double protection explosion-proof valve cover body of the double explosion-proof valve battery core according to claim 5, wherein the lower surface of the body is provided with two bosses. The double-protection explosion-proof valve cover body of the double explosion-proof valve battery body as claimed in claim 5 or 6, wherein the explosion-proof membrane is made of aluminum foil. The double-protection explosion-proof valve cover body of the double explosion-proof valve battery according to claim 5 or 6, wherein the boss is a triangular column shape, a quadrangular column shape, a pentagonal column shape, a hexagonal column shape or a cylindrical shape.