CN213304196U

CN213304196U - Sealing structure for battery shell

Info

Publication number: CN213304196U
Application number: CN202022364391.9U
Authority: CN
Inventors: 胡江波; 曹志锋; 戴波
Original assignee: Shenzhen Heyi New Energy Technology Co ltd
Current assignee: Shenzhen Heyi New Energy Technology Co ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-05-28
Anticipated expiration: 2030-10-21

Abstract

The utility model discloses a sealing structure for a battery shell, which comprises a sealing and pressing component and a pressing platform component, wherein the sealing and pressing component comprises a sealing and pressing head; the pressure platform subassembly is including can drawing in or the first briquetting and the second briquetting of separation, and first briquetting is equipped with first breach groove, and the second briquetting is equipped with the second breach groove that corresponds with first breach groove, and first breach groove and second breach groove form holding tank when first briquetting and second briquetting draw in, and the position of holding the groove corresponds with the position of sealing the pressure head. When the battery shell is matched with the accommodating groove, the first pressing block and the second pressing block are folded to clamp the battery shell, so that the matching is realized, and under the condition, even if slight mismatching exists between the bottom shell and the accommodating groove, the matching can be smoothly realized; simultaneously, first briquetting and second briquetting and battery case's drain pan outer wall butt, and seal the pressure head and seal between drain pan and the upper cover and press to realize the seal of horizontal direction and seal the pressure of vertical direction, guarantee to seal and press the effect, improve and seal and press the reliability.

Description

Sealing structure for battery shell

Technical Field

The utility model relates to a battery packaging technology field especially relates to a sealing structure for battery case.

Background

Button cells, also commonly referred to as Button cells, refer to a type of battery that resembles a Button in shape. Button cells are generally larger in diameter and thinner in thickness than cylindrical cells. Button cell includes the casing and locates the electric core in the casing, and the casing includes drain pan and upper cover, and the upper cover forms the airtight space that is used for installing electric core with the drain pan cooperation, still is equipped with the sealing washer between upper cover and the drain pan.

In a conventional battery case sealing operation, an outer edge of the bottom case is bent toward an outer edge of the upper cover, so that the outer edge of the bottom case and the outer edge of the upper cover abut against each other, thereby completing the package. However, the bottom shell cannot guarantee the processing precision to a hundred percent in the processing process, and the processing precision of a die for sealing is more or less problematic. When the bottom shell is matched with the sealing mold, if a machining precision problem exists, on one hand, the bottom shell cannot be assembled with the sealing mold, on the other hand, additional prestress can be generated after the bottom shell is matched with the sealing mold, and after packaging is completed, the prestress can cause the situation that packaging is not firm and the like to occur at the sealed position, so that the packaging effect is poor.

SUMMERY OF THE UTILITY MODEL

Based on this, there is a need for a sealing structure for a battery case; this a sealing structure for battery case can improve the encapsulation effect.

The technical scheme is as follows:

one embodiment provides a sealing structure for a battery case, including:

the sealing and pressing assembly comprises a sealing and pressing head; and

the pressing platform assembly comprises a first pressing block and a second pressing block which can be folded or separated, the first pressing block is provided with a first notch groove, the second pressing block is provided with a second notch groove corresponding to the first notch groove, the first pressing block and the second pressing block are folded to form an accommodating groove, and the accommodating groove corresponds to the sealing head in position.

According to the sealing structure for the battery shell, when the battery shell is matched with the accommodating groove, the first pressing block and the second pressing block are folded to clamp the battery shell, so that the battery shell is matched, and even if slight mismatching exists between the bottom shell and the accommodating groove, the battery shell can be smoothly matched; simultaneously, first briquetting and second briquetting and battery case's drain pan outer wall butt, and seal the pressure head and seal between drain pan and the upper cover and press to realize the seal of horizontal direction and seal the pressure of vertical direction, guarantee to seal and press the effect, improve and seal and press the reliability.

The technical solution is further explained below:

in one embodiment, the first notch groove is a semicircular groove, the second notch groove is a semicircular groove, and the radius of the first notch groove is equal to the radius of the second notch groove.

In one embodiment, the first pressing block is semicircular in shape, and the first notch groove is formed in the side part of the first pressing block in the direction of the second pressing block;

the second pressing block is semicircular in shape, the second notch groove is formed in the side portion, located in the direction of the first pressing block, of the second pressing block, and the radius of the second pressing block is equal to that of the first pressing block.

In one embodiment, the first pressing block is further provided with a first flange, the first flange is arranged along the groove edge of the first notch groove, the second pressing block is further provided with a second flange, the second flange is arranged along the groove edge of the second notch groove, and the first flange and the second flange are matched to form an annular flange when the first pressing block and the second pressing block are folded.

In one embodiment, the first pressing block is movably arranged, the second pressing block is fixedly arranged, and the first pressing block can move towards the second pressing block so as to enable the first pressing block and the second pressing block to be folded.

In one embodiment, the pressing table assembly further comprises a moving plate and a pedestal, the first pressing block is fixed on the moving plate, the second pressing block is fixed on the pedestal, and the moving plate can move towards the pedestal so as to fold the first pressing block and the second pressing block.

In one embodiment, the moving plate is provided with a first mounting groove, the first mounting groove is formed corresponding to the first pressing block, and the first pressing block is fixed on the moving plate through the first mounting groove;

the pedestal is provided with a second mounting groove, the second mounting groove corresponds to the second pressing block, and the second pressing block is fixed on the pedestal through the second mounting groove.

In one embodiment, the first mounting groove and the second mounting groove are both blind grooves.

In one embodiment, the pedestal is further provided with an avoiding groove, the avoiding groove extends towards the moving plate and extends to the outer side of the pedestal, and the avoiding groove is formed corresponding to the moving plate.

In one embodiment, one end of the sealing and pressing head is provided with a sealing and pressing groove, the sealing and pressing assembly further comprises an installation cylinder and a fastening cylinder, and the fastening cylinder is used for fixing the other end of the sealing and pressing head on the installation cylinder.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Furthermore, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements in the drawings are drawn only by way of example, and not necessarily to true scale.

FIG. 1 is a general schematic diagram of an encapsulation machine in one embodiment that takes the form of a closure for a battery housing;

fig. 2 is a schematic overall structure diagram of a sealing structure for a battery case in the embodiment of fig. 1;

fig. 3 is an exploded view of the overall structure of a sealing structure for a battery case in the embodiment of fig. 1;

FIG. 4 is a schematic view of an assembled structure of a first pressing block and a second pressing block in the embodiment of FIG. 1;

FIG. 5 is a schematic view of the overall structure of the stage in the embodiment of FIG. 1;

FIG. 6 is a schematic view of the overall structure of the moving plate in the embodiment of FIG. 1;

fig. 7 is a sectional view of the overall structure of the sealing assembly in the embodiment of fig. 1.

Reference is made to the accompanying drawings in which:

110. sealing and pressing head; 111. sealing the pressure groove; 120. mounting the cylinder; 130. a fastening cylinder; 201. accommodating grooves; 210. a first pressing block; 211. a first notch groove; 212. a first flange; 220. a second pressing block; 221. a second notch groove; 222. a second flange; 230. moving the plate; 231. a first mounting groove; 240. a pedestal; 241. a second mounting groove; 242. an avoidance groove; 310. a first driving member; 320. a second driving member; 321. a moving block; 330. a first movable plate; 340. a second movable plate; 350. a guide post; 361. a first movable block; 362. a second movable block; 410. a first mounting plate; 411. avoiding the through hole; 420. a second mounting plate; 500. a battery.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

in order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

The housing of a button cell generally comprises a bottom shell and an upper cover, and the packaging is completed by connecting the outer edge of the bottom shell and the outer edge of the upper cover during the packaging process.

The packaging machine can realize the encapsulation operation to the casing, places the casing at work and does, and the drain pan is located the lower part, and the upper cover is located the drain pan, seals the pressure head and is located the top of upper cover, and the during operation seals the pressure head and removes towards the downside to through external force with the outward flange of drain pan lateral buckling inwards, after buckling, the outward flange of drain pan and the outward flange butt of upper cover, thereby accomplish the encapsulation.

In the process, the sealing head is equivalent to an upper die for pressing the bottom shell, and the structure for placing the bottom shell is equivalent to a lower die.

Referring to fig. 1 to 3, an embodiment provides a sealing structure for a battery case, including a sealing and pressing assembly and a pressing table assembly. Wherein:

the sealing and pressing assembly is equivalent to an upper die and is used for pressing the bottom shell, and the pressing platform assembly is equivalent to a lower die and is used for positioning and supporting the bottom shell (or the shell).

Referring to fig. 1, the sealing and pressing assembly includes a sealing and pressing head 110. The sealing head 110 is pressed to perform the sealing operation.

Referring to fig. 2 and 3, the pressing table assembly includes a first pressing block 210 and a second pressing block 220 that can be folded or separated, the first pressing block 210 is provided with a first notch groove 211, the second pressing block 220 is provided with a second notch groove 221 corresponding to the first notch groove 211, when the first pressing block 210 and the second pressing block 220 are folded, the first notch groove 211 and the second notch groove 221 form a receiving groove 201, and the position of the receiving groove 201 corresponds to the position of the pressing head 110.

According to the sealing structure for the battery shell, when the shell of the battery 500 is matched with the accommodating groove 201, the first pressing block 210 and the second pressing block 220 are folded to clamp the shell of the battery 500, so that the matching is realized, and under the condition, even if slight mismatching exists between the bottom shell and the accommodating groove 201, the matching can be smoothly realized; simultaneously, first briquetting 210 and second briquetting 220 and the drain pan outer wall butt of battery 500's casing, and seal the pressure head 110 and seal the pressure between drain pan and the upper cover to realize the seal of horizontal direction and seal the pressure of vertical direction, guarantee to seal and press the effect, improve and seal and press the reliability.

In one embodiment, referring to fig. 3 and 4, the first notch groove 211 is a semicircular groove, the second notch groove 221 is a semicircular groove, and a radius of the first notch groove 211 is equal to a radius of the second notch groove 221.

As shown in fig. 3 and 4, the first notch groove 211 is a semicircular groove, and the second notch groove 221 is a semicircular groove, so as to meet the requirement of placing and positioning the circular button battery 500 and ensure reliable positioning.

In the embodiment shown in fig. 4, the first notch groove 211 is formed through the first pressing piece 210, the second notch groove 221 is formed through the second pressing piece 220, and after the first pressing piece 210 and the second pressing piece 220 are spliced, the first notch groove 211 and the second notch groove 221 form a circular receiving groove 201. During the sealing operation, the bottom case of the button cell 500 is placed in the receiving groove 201.

In one embodiment, referring to fig. 2 to 4, the first pressing block 210 is semicircular, and the first notch groove 211 is formed on a side portion of the first pressing block 210 in the direction of the second pressing block 220.

In one embodiment, referring to fig. 2 to 4, the second pressing block 220 is semicircular, the second notch groove 221 is formed on a side portion of the second pressing block 220 in the direction of the first pressing block 210, and the radius of the second pressing block 220 is equal to the radius of the first pressing block 210.

In the embodiment shown in fig. 4, the first pressing piece 210 is semicircular, the second pressing piece 220 is semicircular, the radius of the first pressing piece 210 is equal to the radius of the second pressing piece 220, when the first pressing piece 210 and the second pressing piece 220 are spliced, a circular block structure is formed, and a circular accommodating groove 201 is formed in the middle of the circular block structure.

In one embodiment, referring to fig. 4, the first pressing block 210 further has a first flange 212, the first flange 212 is disposed along a groove edge of the first notch groove 211, the second pressing block 220 further has a second flange 222, the second flange 222 is disposed along a groove edge of the second notch groove 221, and the first flange 212 and the second flange 222 cooperate to form an annular flange when the first pressing block 210 and the second pressing block 220 are folded.

In the embodiment shown in fig. 4, the first flange 212 is disposed along a groove edge of the first cutaway groove 211 and forms a semicircular flange structure, and the second flange 222 is disposed along a groove edge of the second cutaway groove 221 and forms a semicircular flange structure. With such an arrangement, when the first pressing block 210 and the second pressing block 220 are spliced, the first flange 212 and the second flange 222 form a circular annular flange, and the annular flange is arranged corresponding to the edge of the casing of the button cell 500 to perform a limiting or positioning function.

In one embodiment, referring to fig. 1 to 3, the first pressing piece 210 is movably disposed, the second pressing piece 220 is fixedly disposed, and the first pressing piece 210 can move toward the second pressing piece 220, so that the first pressing piece 210 and the second pressing piece 220 are folded.

In the embodiment shown in fig. 2, the first pressing block 210 can move towards the second pressing block 220 under the pushing action of the second driving member 320, so as to realize the folding operation (splicing) of the first pressing block 210 and the second pressing block 220; meanwhile, the first pressing block 210 can also move in the direction away from the second pressing block 220 under the pushing action of the second driving member 320, so that the separation operation of the first pressing block 210 and the second pressing block 220 is realized.

In one embodiment, referring to fig. 2 and 3, the pressing table assembly further includes a moving plate 230 and a base 240, the first pressing block 210 is fixed on the moving plate 230, the second pressing block 220 is fixed on the base 240, and the moving plate 230 can move towards the base 240, so that the first pressing block 210 and the second pressing block 220 are folded.

In the embodiment shown in fig. 2, the first pressing block 210 is fixed on the moving plate 230, the second pressing block 220 is fixed on the pedestal 240, the pedestal 240 is fixedly disposed, and the moving plate 230 can move under the pushing action of the second driving member 320, so as to realize the folding or separating operation of the first pressing block 210 and the second pressing block 220.

In one embodiment, referring to fig. 3 and 6, the moving plate 230 is provided with a first mounting groove 231, the first mounting groove 231 is opened corresponding to the first pressing block 210, and the first pressing block 210 is fixed on the moving plate 230 through the first mounting groove 231.

Referring to the embodiment shown in fig. 2 and 3, the moving plate 230 is provided with a first mounting groove 231, the first mounting groove 231 is a semicircular groove, the radius of the first mounting groove 231 is equal to the radius of the first pressing block 210, the first pressing block 210 is fixed on the moving plate 230 through the first mounting groove 231, and after the first pressing block 210 is fixed, the side edge of the moving plate 230 is aligned with the side edge of the first pressing block 210.

Further, the first pressing block 210 may be fixed to the moving plate 230 by means of screw fastening.

In one embodiment, referring to fig. 3 and 5, the pedestal 240 is provided with a second mounting groove 241, the second mounting groove 241 is opened corresponding to the second pressing block 220, and the second pressing block 220 is fixed on the pedestal 240 through the second mounting groove 241.

Referring to the embodiment shown in fig. 2 and 3, the pedestal 240 is provided with a second mounting groove 241, the second mounting groove 241 is a semicircular groove, the radius of the second mounting groove 241 is equal to the radius of the second pressing block 220, and the second pressing block 220 is fixed on the pedestal 240 through the second mounting groove 241.

Further, the second pressing block 220 may be fixed to the pedestal 240 by means of screw fastening.

In one embodiment, referring to fig. 3, 5 and 6, the first mounting groove 231 and the second mounting groove 241 are both blind grooves.

In the embodiment shown in fig. 5, the second mounting groove 241 of the pedestal 240 is a blind groove, so that the second pressing block 220 can be fastened by screws or the like.

In the embodiment shown in fig. 6, the first mounting groove 231 of the moving plate 230 is a blind groove, so that the first pressing block 210 is fastened by a screw or the like.

In one embodiment, referring to fig. 2, fig. 3 and fig. 5, the pedestal 240 is further provided with an avoiding groove 242, the avoiding groove 242 extends toward the moving plate 230 and extends to the outer side of the pedestal 240, and the avoiding groove 242 is opened corresponding to the moving plate 230.

In the embodiment shown in fig. 5, the pedestal 240 is provided with an avoiding groove 242, and the avoiding groove 242 is provided with a predetermined depth on the moving plate 230, so that the moving plate 230 does not interfere with the pedestal 240 when being matched with the pedestal, and finally the first pressing block 210 and the second pressing block 220 are smoothly folded together to form the receiving groove 201.

In the embodiment shown in fig. 5, the opening depth of the avoiding groove 242 is greater than the opening depth of the second mounting groove 241, and after the second pressing piece 220 is fixed on the pedestal 240 through the second mounting groove 241, the side edge of the second pressing piece 220 is aligned with the groove wall of the avoiding groove 242.

In one embodiment, referring to fig. 7, one end of the sealing head 110 is provided with a sealing groove 111, the sealing assembly further includes a mounting cylinder 120 and a fastening cylinder 130, and the fastening cylinder 130 is used for fixing the other end of the sealing head 110 to the mounting cylinder 120.

In the embodiment shown in fig. 7, the mounting cylinder 120 is fixedly disposed, and the upper end of the sealing head 110 is fastened below the mounting cylinder 120 by the fastening cylinder 130. Referring to fig. 1, during operation, the mounting tube 120 moves downward to drive the pressing head 110 to move downward, and the groove wall of the pressing groove 111 performs bending pressing operation on the bottom case of the battery 500, which is not described again.

Referring to fig. 1, there is provided a packaging machine using the sealing structure for a battery case according to any one of the embodiments, wherein:

the first mounting plate 410 and the second mounting plate 420 are fixedly arranged at intervals, the first movable plate 330 and the second movable plate 340 are respectively fixed at two ends of the guide column 350, the guide column 350 can extend and retract on the first mounting plate 410 and the second mounting plate 420, the first movable plate 330 is located at the lower end of the first mounting plate 410, and the second movable plate 340 is located at the upper end of the second mounting plate 420.

The first driving member 310 may be a device capable of outputting telescopic power, such as an electric push rod, a hydraulic push rod, a pneumatic push rod, or the like, the first mounting plate 410 is provided with an avoidance through hole 411, the first movable block 361 and the second movable block 362 are rotatably connected, the lower end of the first movable block 361 is rotatably connected with the upper end of the first movable plate 330, the upper end of the second movable block 362 is rotatably connected with the lower end of the second mounting plate 420, the output end of the first driving member 310 is rotatably connected with the first movable block 361 or the second movable block 362, when the first driving member 310 outputs telescopic motion, the first movable block 361 and the second movable block 362 can swing, so as to drive the first movable plate 330 to move, the first movable plate 330 drives the guide column 350 to extend and retract, so as to drive the second movable plate 340 at the other end of the guide column 350 to move.

The second driving member 320 is fixed on the second mounting plate 420, the second driving member 320 is a device capable of outputting telescopic power, and may be arranged in the same manner as the first driving member 310, the moving block 321 is arranged on the second driving member 320, the moving plate 230 is fixed on the moving block 321, and the pedestal 240 is fixed on the second mounting plate 420. Thus, when the second driving member 320 pushes the moving block 321 to move, the moving block 321 can drive the moving plate 230 to move, and the moving plate 230 drives the first pressing block 210 to move, so that the first pressing block 210 and the second pressing block 220 are folded or separated.

Referring to fig. 1 to 3, there are three first pressing blocks 210 and three second pressing blocks 220, three sealing pressing heads 110, three mounting cylinders 120 and three fastening cylinders 130, and the upper end of the mounting cylinder 120 is fixed on the second movable plate 340.

Optionally, the sealing grooves 111 on different sealing heads 110 have different structures, so as to seal the housing of the battery 500 for three times, thereby improving the sealing effect.

It should be noted that, the number of the sealing heads 110 may be set based on different strain characteristics caused by the material of the battery case, if the strain is large, three, four or even more sealing heads are set to perform multiple sealing operations, and the accommodating grooves 201 are correspondingly set, which is not described herein again.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A sealing structure for a battery case, comprising:

the sealing and pressing assembly comprises a sealing and pressing head; and

2. The sealing structure for a battery case according to claim 1, wherein the first notch groove is a semicircular groove, the second notch groove is a semicircular groove, and a radius of the first notch groove is equal to a radius of the second notch groove.

3. The sealing structure for a battery case according to claim 2, wherein the first pressing piece is provided in a semicircular shape, and the first notch groove is provided on a side portion of the first pressing piece in the direction of the second pressing piece;

4. The sealing structure for a battery case according to claim 1, wherein the first pressing piece is further provided with a first flange disposed along a groove edge of the first cutout groove, the second pressing piece is further provided with a second flange disposed along a groove edge of the second cutout groove, and the first flange and the second flange cooperate to form an annular flange when the first pressing piece and the second pressing piece are folded.

5. The sealing structure for a battery case according to any one of claims 1 to 4, wherein the first pressing piece is movably disposed, the second pressing piece is fixedly disposed, and the first pressing piece is movable toward the second pressing piece to close the first pressing piece and the second pressing piece.

6. The sealing structure for a battery case according to claim 5, wherein the pressing table assembly further comprises a moving plate and a pedestal, the first pressing block is fixed on the moving plate, the second pressing block is fixed on the pedestal, and the moving plate is capable of moving toward the pedestal to close the first pressing block and the second pressing block.

7. The sealing structure for the battery shell as claimed in claim 6, wherein the moving plate is provided with a first mounting groove, the first mounting groove is formed corresponding to the first pressing block, and the first pressing block is fixed on the moving plate through the first mounting groove;

8. The sealing structure for a battery case according to claim 7, wherein the first mounting groove and the second mounting groove are both blind grooves.

9. The sealing structure for battery cases according to claim 8, wherein the pedestal further has an avoiding groove extending toward the moving plate and extending to the outside of the pedestal, and the avoiding groove is opened corresponding to the moving plate.

10. The sealing structure for the battery shell as claimed in claim 5, wherein one end of the sealing head is provided with a sealing groove, the sealing assembly further comprises a mounting tube and a fastening tube, and the fastening tube is used for fixing the other end of the sealing head on the mounting tube.