CN219778941U - End socket for pressure relief battery - Google Patents

Abstract

The utility model relates to the technical field of soft package battery production, in particular to an end socket for a pressure relief battery, which comprises the following components: the top sealing assembly is used for sealing the top of the battery to be sealed, and the side sealing assembly is used for sealing the side part of the battery to be sealed; and when the top sealing component and the side sealing component are used for simultaneously sealing the top and the side of the battery to be sealed, the side part of the top sealing component, which is close to the battery to be sealed, is abutted against one end part of the side sealing component along the length direction of the side sealing component, or the side part of the side sealing component, which is close to the battery to be sealed, is abutted against one end part of the top sealing component along the length direction of the side sealing component. Therefore, the length of the top sealing assembly is increased by shortening the length of the side sealing assembly, or the length of the top sealing assembly is shortened by increasing the length of the side sealing assembly, so that the overlapping area can not appear at the top sealing position and the side sealing position, and the problem caused by secondary heat sealing at the junction of the top sealing and the side sealing can be effectively avoided.

Description

End socket for pressure relief battery

Technical Field

The utility model relates to the technical field of soft package battery production, in particular to an end socket for a pressure relief battery.

Background

The existing battery packaging technology generally adopts top sealing and side sealing firstly, so that the junction of the top sealing and the side sealing is subjected to secondary heat sealing, the aluminum plastic film at the junction of the top sealing and the side sealing is in oversmelting, the inside of the aluminum plastic film is a PP layer, the PP layer at the junction is oversmelting and then diffuses to the periphery, the middle aluminum layer is exposed at the junction of the top sealing and the side sealing, the exposed part of the aluminum layer is contacted with electrolyte after the liquid injection process, the aluminum layer is corroded, and the safety risk is caused.

Disclosure of Invention

The utility model aims to provide a pressure release battery seal head, which solves the technical problem that the battery packaging technology in the prior art generally adopts top sealing and side sealing, so that the junction of the top sealing and the side sealing is subjected to secondary heat sealing, and the aluminum plastic film at the junction of the top sealing and the side sealing is damaged to a certain extent.

The utility model provides a pressure relief battery seal head, which comprises: the top sealing assembly is used for sealing the top of the battery to be sealed, and the side sealing assembly is used for sealing the side part of the battery to be sealed;

and when the top sealing component and the side sealing component are used for simultaneously sealing the top and the side of the battery to be sealed, the side part, close to the battery to be sealed, of the top sealing component is abutted against one end part, along the length direction, of the side sealing component, or the side part, close to the battery to be sealed, of the side sealing component is abutted against one end part, along the length direction, of the top sealing component.

In the above technical solution, further, the top sealing assembly includes an upper top sealing member and a lower top sealing member, and are disposed in a vertically opposite manner along a preset direction; the side seal assembly comprises an upper side seal member and a lower side seal member, and the upper side seal member and the lower side seal member are arranged in an up-down opposite mode along the preset direction;

and when the top seal assembly and the side seal assembly simultaneously seal the top and the side of the battery to be sealed, the side part, close to the battery, of one of the lower side seal members abuts against one end part, along the length direction, of the other, of the lower top seal member, and correspondingly, the side part, close to the battery, of one of the upper side seal members abuts against one end part, along the length direction, of the other.

In any of the above technical solutions, further, the upper top sealing member is connected with the upper side sealing member.

In any of the above technical solutions, further, the upper top sealing member is detachably connected with the upper side sealing member.

In any one of the above technical solutions, further, one of the upper side seal member and the upper top seal member is provided with a first threaded hole, and the other of the upper side seal member and the upper top seal member is provided with a first kidney-shaped through hole;

the pressure relief battery seal head further comprises a first locking member, and a threaded part of the first locking member penetrates through the first kidney-shaped through hole to be connected with the first threaded hole so as to connect the upper side sealing member and the upper top sealing member together;

the first kidney-shaped through hole is a countersunk hole.

In any of the above technical solutions, further, the lower top sealing member is connected with the lower side sealing member.

In any of the above technical solutions, further, the lower top sealing member is detachably connected with the lower side sealing member.

In any one of the above technical solutions, further, one of the lower side sealing member and the lower side sealing member is provided with a second threaded hole, and the other of the lower side sealing member and the lower side sealing member is provided with a second kidney-shaped through hole;

the pressure relief battery seal head further comprises a second locking member, and a threaded part of the second locking member penetrates through the second kidney-shaped through hole to be connected with the second threaded hole so as to connect the lower side seal member and the lower top seal member together;

the second kidney-shaped through hole is a countersunk hole.

In any one of the above-described aspects, further, the upper top sealing member and/or the lower top sealing member is formed with a convex widening portion extending toward a main body portion of the battery to be packaged;

the upper top sealing member is provided with lug avoiding openings which are arranged at intervals along the length direction of the upper top sealing member, and the raised widening part is arranged between the two lug avoiding openings;

the minimum distance between the raised widening and the body portion of the battery to be packaged is less than or equal to 2mm.

In any of the above technical solutions, further, the upper side sealing member and the lower side sealing member are respectively provided with arc avoidance notches with openings relatively arranged, and are used for avoiding the pressure reducing valve.

Compared with the prior art, the utility model has the beneficial effects that:

according to the pressure relief battery seal head provided by the utility model, the length of the side seal assembly is shortened, the length of the top seal assembly is increased, or the length of the side seal assembly is increased, so that the overlapping area between the top seal position and the side seal position can not occur, the secondary heat sealing at the junction of the top seal and the side seal can be effectively avoided, the problem of excessive melting of an aluminum plastic film at the junction of the top and the side seal can not occur, the problem of exposure of the aluminum layer at the junction can not occur, the corrosion of the aluminum layer can not occur, and the safety risk can not occur, namely the safety and the reliability in the use process of the battery can be greatly improved.

In addition, all set up the arc of relative setting and dodge the breach on upper side seal component and downside seal component, its shape agrees with the relief valve of battery, utilize the high temperature of upper and lower side seal component during the seal, make plastic-aluminum membrane and the hot melt adhesive of relief valve both sides heat, after the heating with plastic-aluminum membrane heat seal layer hot melt together, make the pressure release battery accomplish the sealed effect of normal battery when not weakening seal intensity, and can carry out the pressure release to the battery from the lateral part of battery through the relief valve moreover, and then avoided the safety problem that leads to in the pressure release of tab department among the prior art.

In addition, by widening the upper and lower top seal members, the strength of the top seal is enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is an assembly diagram of a seal head and a battery core for a pressure relief battery according to an embodiment of the present utility model;

fig. 2 is another assembly diagram of a seal head and a battery core for a pressure relief battery according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a pressure relief battery seal head according to an embodiment of the present utility model;

fig. 4 is another schematic structural diagram of a pressure relief battery seal head according to an embodiment of the present utility model;

FIG. 5 is a schematic structural view of an upper side seal member and a lower side seal member according to an embodiment of the present utility model;

FIG. 6 is a schematic structural view of an upper top seal member and a lower top seal member according to an embodiment of the present utility model;

FIG. 7 is a schematic view of another structure of an upper top seal member and a lower top seal member according to an embodiment of the present utility model;

FIG. 8 is an assembled view of an upper top seal member and an upper side seal member provided in an embodiment of the present utility model;

fig. 9 is an assembly view of a lower top seal member and a lower side seal member according to an embodiment of the present utility model.

Reference numerals:

1-top seal assembly, 11-upper top seal member, 111-first kidney-shaped through hole, 1111-first through hole, 1112-second through hole, 12-lower top seal member, 121-second kidney-shaped through hole, 1211-third through hole, 1212-fourth through hole, 13-tab relief opening, 14-raised widening portion, 2-side seal assembly, 21-upper side seal member, 211-first threaded hole, 22-lower side seal member, 221-second threaded hole, 23-arc relief notch, 3-first locking member, 4-second locking member, 5-battery, 51-main body portion, 52-tab.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.

The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

A pressure relief battery seal according to some embodiments of the present utility model is described below with reference to fig. 1 to 9.

Example 1

Referring to fig. 1 to 4, an embodiment of the present utility model provides a pressure relief battery seal head, including: the top seal assembly 1 and the side seal assembly 2, the top seal assembly 1 is used for packaging the top of the battery 5 to be packaged, the side seal assembly 2 is used for packaging the side portion of the battery 5 to be packaged, and when the top seal assembly 1 and the side seal assembly 2 are used for packaging the top and the side portion of the battery 5 to be packaged simultaneously, the side portion, close to the battery 5 to be packaged, of the top seal assembly 1 is abutted against one end portion, along the length direction, of the side seal assembly 2.

Based on the structure described above, through shortening the length of side seal subassembly 2, increase the length of top seal subassembly 1 for the overlapping area can not appear in top seal position and side seal position, can effectively avoid top seal and side seal junction's secondary heat-seal, make the problem of excessive melting can not appear in the plastic-aluminum membrane of top side seal junction, and then can not appear the problem that the junction aluminium layer exposes, and the aluminium layer can not take place to corrode, and then can not appear the security risk, has also promoted security and reliability in the battery 5 use promptly greatly.

In this embodiment, preferably, as shown in fig. 1 to 4, the top sealing assembly 1 includes an upper top sealing member 11 and a lower top sealing member 12, and is disposed opposite from each other up and down in a predetermined direction, with the side portion of the battery 5 placed therebetween, and side-sealing is performed;

the side seal assembly 2 comprises an upper side seal member 21 and a lower side seal member 22, and are arranged in a vertically opposite manner along a preset direction, and the top of the battery 5 can be placed between the upper side seal member and the lower side seal member and is encapsulated at the top;

and when the top seal assembly 1 and the side seal assembly 2 simultaneously seal the top and side portions of the battery 5 to be sealed, the side portion of the lower top seal member 12, which is close to the battery 5 to be sealed, abuts against the front end of the lower side seal member 22 in the length direction thereof; along the length direction of the upper side sealing member 21, the side part of the upper top sealing member 11, which is close to the battery 5 to be packaged, is abutted against the front end of the upper side sealing member 21 along the length direction thereof, so that the overlapping area of the top sealing position and the side sealing position cannot occur, and the secondary heat sealing at the junction of the top sealing and the side sealing can be effectively avoided.

Preferably, as shown in fig. 6 and 7, the upper top sealing member 11 and the lower top sealing member 12 are symmetrically disposed with respect to the horizontal plane, and it can be seen that the upper side sealing member 21 and the lower side sealing member 22 are symmetrically disposed with respect to the horizontal plane.

Preferably, as shown in fig. 6 and 7, the upper top sealing member 11 and the lower top sealing member 12 are both rectangular parallelepiped structures.

Among them, it is preferable that, as shown in fig. 4 and 5, the upper side seal member 21 and the lower side seal member 22 are each of a structure having an L-shaped cross section in a direction perpendicular to the length direction thereof, and when packaged, vertical portions of the two L-shaped structures extending in the vertical direction can press against the side portions of the battery 5.

In this embodiment, as shown in fig. 3, 4 and 8, the upper top sealing member 11 is preferably connected to the upper side sealing member 21, and is used as a whole, so that the positions of the two members need to be calibrated and aligned, thereby improving the convenience of operation and improving the packaging efficiency. Of course, the upper top sealing member 11 and the upper side sealing member 21 may have no connection relationship, and only abut against each other.

Further, preferably, the upper top sealing member 11 is detachably connected with the upper side sealing member 21, so that later individual maintenance or replacement is facilitated, the integral scrapping caused by damage of one part is avoided, and the material cost is saved.

On this basis, preferably, as shown in fig. 5 to 7 and 8, the upper side sealing member 21 is provided with a first screw hole 211, the upper top sealing member 11 is provided with a first kidney-shaped through hole 111, the head for a pressure relief battery further includes a first locking member 3, and a screw portion of the first locking member 3 passes through the first kidney-shaped through hole 111 to be connected with the first screw hole 211 to connect the upper side sealing member 21 with the upper top sealing member 11.

As is apparent from the above-described structure, the upper side seal member 21 and the upper top seal member 11 are assembled together using bolts, kidney-shaped holes, and screw holes, not only a detachable connection structure is formed, but also a connection structure with an adjustable position is formed, specifically, the upper top seal member 11 can be moved relative to the upper side seal member 21, thereby adjusting the position of the upper top seal member 11, that is, the gap between the upper top seal member 11 and the lower top seal member 12 can be adjusted, and adapting the thickness of the top of the battery 5 to be packaged differently.

Among them, it is preferable that the first kidney-shaped through hole 111 extends in the vertical direction and the horizontal direction, that is, the length direction thereof is in the same direction as the vertical direction and the depth direction thereof is in the same direction as the horizontal direction, as shown in fig. 5 to 7.

Preferably, as shown in fig. 5 to 7, the first kidney-shaped through hole 111 is a countersunk hole, that is, the first kidney-shaped through hole 111 includes a first through hole 1111 and a second through hole 1112 which are kidney-shaped holes, and are sequentially arranged along the thickness direction of the upper top sealing member 11, the first through hole 1111 is a large hole, the second through hole 1112 is a small hole, and a step surface is formed at a position where the two meet, and further, preferably, the first locking member 3 is a bolt, and a limit head portion thereof abuts against the step surface formed by the first through hole 1111 and the second through hole 1112, so as to play a role of limiting.

In this case, the number of the first locking members 3 may be preferably two, and sequentially spaced along the first kidney-shaped through holes 111, as shown in fig. 1, but the number of the first locking members 3 is not limited thereto, and may be one, three, or the like.

In this embodiment, as shown in fig. 3, 4 and 9, the lower top sealing member 12 is preferably connected to the lower side sealing member 22, and is used as a whole, so that the positions of the two members need to be calibrated and aligned, thereby improving the convenience of operation and improving the packaging efficiency. Of course, the lower top seal member 12 and the lower side seal member 22 may also have no connection relationship, and only abut together.

Further, the lower top seal member 12 is preferably removably connected to the lower side seal member 22 for later individual repair or replacement, avoiding total scrap due to damage to one component, and saving material costs.

In this embodiment, preferably, as shown in fig. 5 to 7 and 9, the lower seal member 22 is provided with a second screw hole 221, the lower top seal member 12 is provided with a second kidney-shaped through hole 121, the head for a pressure relief battery further includes a second locking member 4, and the screw portion of the second locking member 4 passes through the second kidney-shaped through hole 121 to be connected with the second screw hole 221 to connect the lower seal member 22 with the lower top seal member 12.

As is apparent from the above-described structure, the lower side seal member 22 and the lower top seal member 12 are assembled together using bolts, kidney-shaped holes, and screw holes, not only a detachable connection structure is formed, but also a connection structure with an adjustable position is formed, specifically, the lower top seal member 12 can be moved relative to the lower side seal member 22, thereby adjusting the position of the lower top seal member 12, that is, adjusting the gap between the upper top seal member 11 and the lower top seal member 12, adapting to the thickness of the top of the battery 5 to be packaged differently.

Among them, it is preferable that the second kidney-shaped through hole 121 extends in the vertical direction and the horizontal direction, that is, the length direction thereof is in the same direction as the vertical direction and the depth direction thereof is in the same direction as the horizontal direction, as shown in fig. 6 and 7.

Preferably, as shown in fig. 6 and 7, the second kidney-shaped through hole 121 is a countersunk hole, that is, the second kidney-shaped through hole 121 includes a third through hole 1211 and a fourth through hole 1212 which are kidney-shaped holes, and are sequentially arranged along the thickness direction of the lower top sealing member 12, the third through hole 1211 is a large hole, the fourth through hole 1212 is a small hole, and a step surface is formed at a position where the two cross, and further preferably, the first locking member 3 is a bolt, and a limit head portion thereof abuts against the step surface formed by the third through hole 1211 and the fourth through hole 1212, so as to play a role of limiting.

Here, preferably, as shown in fig. 9, the number of the second locking members 4 may be two and sequentially spaced along the second kidney-shaped through holes 121, and of course, the number of the second locking members 4 is not limited thereto, but may be one, three, that is, more than two, and the like.

In this embodiment, preferably, as shown in fig. 4, both the upper top sealing member 11 and the lower top sealing member 12 are formed with a convex widening 14 extending toward the main body portion 51 of the battery 5 to be packaged.

According to the structure, the strength of the top sealing structure is improved, the packaging effect is improved, and the service life of the top sealing structure is prolonged.

Further, as shown in fig. 4, it is preferable that the raised widened portion 14 has a regular rectangular parallelepiped structure and is identical to both the length direction and the width direction of the rectangular parallelepiped-shaped upper top seal member 11 or lower top seal member 12.

On this basis, preferably, as shown in fig. 2, the distance between the raised widened portion 14 and the main body portion 51 of the battery 5 to be packaged is less than or equal to 2mm, and the raised widened portion 14 is disposed between the two tab avoiding openings 13, avoiding damage to the separator and the positive and negative electrode sheets during packaging.

Note that: the shape of the aforementioned convex widening 14 is not limited to a rectangular parallelepiped shape, but may be a shaped block, particularly when it is of an irregular structure, to ensure that the minimum distance between the convex widening 14 and the main body portion 51 of the battery 5 to be packaged is less than or equal to 2mm.

In this embodiment, it is preferable that the upper top sealing member 11 is formed with tab relief openings 13 provided at intervals along its length direction, as shown in fig. 1, 8 and 9, to avoid crushing the tab 52.

Further, preferably, the number of the tabs 52 is two, and correspondingly, two tab avoiding openings 13 are provided at intervals in sequence along the longitudinal direction of the upper top seal member 11.

In this embodiment, as shown in fig. 1, 8 and 9, the upper side sealing member 21 and the lower side sealing member 22 are preferably provided with arc-shaped avoiding notches 23 with opposite openings, respectively, and are used for avoiding the pressure reducing valve.

According to the above-described structure, the seal Shi Li is heated by the hot melt adhesive on both sides of the upper and lower side seal members 22, and is thermally fused with the heat seal layer of the aluminum plastic film after being heated, so that the strength of the seal is not weakened, the seal is sealed, and the pressure of the battery 5 can be relieved from the side of the battery 5 through the pressure relief valve, thereby avoiding the safety problem caused by pressure relief at the tab 52 in the prior art.

Preferably, the two arc-shaped avoidance notches 23 are matched with the pressure release valve after being butted.

Example two

The second embodiment of the present utility model also provides a pressure relief battery seal head, which is an improvement based on the first embodiment, the technical content disclosed in the first embodiment is not repeated, and the disclosure of the first embodiment also belongs to the disclosure of the present embodiment.

The difference between the pressure relief battery end socket provided in this embodiment and the pressure relief battery end socket provided in the first embodiment is that:

when the top seal assembly 1 and the side seal assembly 2 simultaneously seal the top and side portions of the battery 5 to be sealed, the side portion of the side seal assembly 2, which is close to the battery 5 to be sealed, abuts against one end portion of the top seal assembly 1 in the length direction thereof.

As can be seen from this, the side portion of one of the lower side seal members 22, which is close to the battery 5, abuts against one end portion of the lower top seal member 12 in its own length direction, and correspondingly, the side portion of one of the upper side seal members 21, which is close to the battery 5, abuts against one end portion of the upper top seal member 11 in its own length direction.

Correspondingly, countersunk kidney-shaped holes may be formed in each of the upper side seal member 21 and the lower side seal member 22, correspondingly, threaded holes are formed in each of the upper top seal member 11 and the lower top seal member 12, and then the upper side seal member 21 and the upper top seal member 11 are connected by a fastening member such as a bolt, and the lower side seal member 22 and the lower top seal member 12 are connected by another fastening member such as a bolt (the structure in this embodiment is not shown in the figure).

According to the pressure relief battery seal head, the length of the side seal assembly 2 is increased, the length of the top seal assembly 1 is shortened, the overlapping area between the top seal position and the side seal position can not occur, the secondary heat sealing at the junction of the top seal and the side seal can be effectively avoided, the problem of excessive melting of an aluminum plastic film at the junction of the top side seal can not occur, the problem that the aluminum layer at the junction is exposed can not occur, the aluminum layer cannot be corroded, the safety risk can not occur, and the safety and the reliability of the battery 5 in the use process are also greatly improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The utility model provides a pressure release battery seal head which characterized in that includes: the top sealing assembly is used for sealing the top of the battery to be sealed, and the side sealing assembly is used for sealing the side part of the battery to be sealed;

and when the top sealing component and the side sealing component are used for simultaneously sealing the top and the side of the battery to be sealed, the side part, close to the battery to be sealed, of the top sealing component is abutted against one end part, along the length direction, of the side sealing component, or the side part, close to the battery to be sealed, of the side sealing component is abutted against one end part, along the length direction, of the top sealing component.

2. The pressure relief battery closure according to claim 1, wherein the top sealing assembly comprises an upper top sealing member and a lower top sealing member, and are disposed in a vertically opposite manner along a predetermined direction; the side seal assembly comprises an upper side seal member and a lower side seal member, and the upper side seal member and the lower side seal member are arranged in an up-down opposite mode along the preset direction;

and when the top seal assembly and the side seal assembly simultaneously seal the top and the side of the battery to be sealed, the side part, close to the battery, of one of the lower side seal members abuts against one end part, along the length direction, of the other, of the lower top seal member, and correspondingly, the side part, close to the battery, of one of the upper side seal members abuts against one end part, along the length direction, of the other.

3. The pressure relief battery closure according to claim 2, wherein the upper top seal member is connected to the upper side seal member.

4. The pressure relief battery closure according to claim 3, wherein said upper top seal member is removably connected to said upper side seal member.

5. The pressure relief battery closure according to claim 4, wherein one of the upper side seal member and the upper top seal member is provided with a first threaded hole, and the other of the upper side seal member and the upper top seal member is provided with a first kidney-shaped through hole;

the pressure relief battery seal head further comprises a first locking member, and a threaded part of the first locking member penetrates through the first kidney-shaped through hole to be connected with the first threaded hole so as to connect the upper side sealing member and the upper top sealing member together;

the first kidney-shaped through hole is a countersunk hole.

6. The pressure relief battery closure according to claim 2, wherein the lower top seal member is connected to the lower side seal member.

7. The pressure relief battery closure according to claim 6, wherein said lower top seal member is removably connected to said lower side seal member.

8. The pressure relief battery closure according to claim 7, wherein one of the lower side seal member and the lower side seal member is provided with a second threaded hole, and the other of the lower side seal member and the lower side seal member is provided with a second kidney-shaped through hole;

the pressure relief battery seal head further comprises a second locking member, and a threaded part of the second locking member penetrates through the second kidney-shaped through hole to be connected with the second threaded hole so as to connect the lower side seal member and the lower top seal member together;

the second kidney-shaped through hole is a countersunk hole.

9. The head for a pressure relief battery according to claim 2, wherein the upper top sealing member and/or the lower top sealing member is formed with a raised widened portion extending toward a main body portion of a battery to be packaged;

the upper top sealing member is provided with lug avoiding openings which are arranged at intervals along the length direction of the upper top sealing member, and the raised widening part is arranged between the two lug avoiding openings;

the minimum distance between the raised widening and the body portion of the battery to be packaged is less than or equal to 2mm.

10. The head for a pressure relief battery according to any one of claims 2 to 9, wherein the upper side seal member and the lower side seal member are respectively provided with arc-shaped avoidance notches with openings arranged opposite to each other, and are used for avoiding a pressure relief valve.