Battery cell shell and processing device

Abstract

The utility model provides a battery cell shell and a shell processing device, the battery cell shell comprises a shell body with an opening at one end, the peripheral wall of the shell body is provided with two side wall parts which are oppositely arranged along the thickness direction of a battery cell, and a bulge which is arched outwards is formed on at least one side wall part of the shell body. According to the battery cell shell disclosed by the utility model, the bulge which is arched outwards is formed on at least one side wall part of the battery cell shell, so that limiting and supporting between two adjacent battery cell shells are facilitated, a gap can be formed between two adjacent battery cells, and the contact area between the two adjacent battery cells is reduced, so that heat transfer between the two battery cells is reduced, and the service life of the battery cell shell is prolonged. According to the invention, the thermal runaway influence can be reduced, the heat dissipation effect of the battery cell can be improved, and the bulges are directly formed on the side wall part, so that the number of parts can be reduced, and the assembly efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery cell shell. The utility model also relates to a processing device for processing the shell. Background Art

[0002] With the promotion and application of power batteries, people pay more and more attention to the safety of power batteries. The battery module includes multiple battery cells arranged side by side. In the prior art, the surface of the battery cell shell is smooth, such as square batteries, including long thin blade metal hard shell batteries, etc. When such battery cells are arranged in parallel, the large surfaces of the two battery cells (the two side surfaces arranged oppositely along the thickness direction of the battery cell) are usually fitted together, or a separate partition structure such as foam is set between the large surfaces of the two battery cells.

[0003] In the above structure, the solution of making the large surfaces of two adjacent battery cells completely fit together is easy to accumulate heat due to the large contact area, which is not conducive to the heat dissipation of the battery cells. At the same time, when thermal runaway occurs, this solution of making the large surfaces of two battery cells fit together will also aggravate the heat conduction between adjacent battery cells, which is easy to cause thermal runaway and is not conducive to the safety of the battery.

[0004] In addition, the solution of directly contacting the large surfaces of the two battery cells also has the problem of stress concentration, which is not conducive to the performance of the battery cells. In addition, the provision of a separation structure such as foam will increase the number of parts, making the assembly process more complicated and the use effect is not ideal. Utility Model Content

[0005] In view of this, the utility model aims to provide a battery cell shell to improve the safety of the battery cell.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A battery cell shell comprises a shell body with an open end, the peripheral wall of the shell body comprises two side wall parts which are arranged oppositely along the thickness direction of the battery cell, and at least one of the side wall parts is formed with a protrusion which arches outwards.

[0008] Further, the protrusions are multiple and spaced apart; and / or,

[0009] The protrusions are provided on both side wall parts, and the protrusions on the two side wall parts are arranged in a staggered manner.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The battery cell shell of the utility model is advantageous for limiting support between two adjacent battery cell shells by forming a protrusion that arches outward on at least one side wall portion thereof, and can form a gap between two adjacent battery cells, and is advantageous for reducing the contact area between the two adjacent battery cells, thereby facilitating reduction of heat transfer between the two battery cells, and is advantageous for reducing the influence of thermal runaway, and is also advantageous for improving the heat dissipation effect of the battery cells, and by directly forming the protrusion on the side wall portion, it is advantageous for reducing the number of components, thereby facilitating improvement of assembly efficiency.

[0012] In addition, there are multiple protrusions, which is beneficial to improving the stability of support and limitation between the two battery cells; the protrusions on the two side wall parts are staggered, which is beneficial for the protrusions on the two battery cell shells to not interfere with each other, thereby having a better use effect.

[0013] Another object of the utility model is to provide a shell processing device, which is used to process the battery cell shell as described above;

[0014] The processing device comprises an inner mold body inserted in the shell body, an extrusion block arranged in the inner mold body and capable of sliding toward the side wall portion, and a force transmission rod slidably arranged on the inner mold body, and the outer periphery of the force transmission rod is provided with a push portion arranged corresponding to the extrusion block;

[0015] The extrusion block has a first position in which it is accommodated in the inner mold body and located on one side of the pushing portion, and a second position in which when the force transmission rod slides, it is pushed by the pushing portion and extends out of the inner mold body. In the second position, the extrusion block can extrude the side wall portion outward to form the protrusion on the side wall portion.

[0016] Furthermore, the extrusion blocks are multiple and spaced apart along the height direction of the inner mold body, and the force transmission rod is provided with multiple pushing parts respectively used for pushing the extrusion blocks.

[0017] Furthermore, the force transmission rods are arranged in two rows at intervals on the inner mold body, and a plurality of the force transmission rods in the two rows are staggered along the length direction of the inner mold body;

[0018] The extrusion blocks are a plurality of blocks slidably disposed on both sides of the inner mold body corresponding to the force transmission rods in each column.

[0019] Furthermore, the force transmission rod is provided with a plurality of grooves spaced apart along its length direction, and the pushing portion is formed between two adjacent grooves;

[0020] In the first position, the end of the extrusion block is located in the corresponding groove.

[0021] Furthermore, the groove wall of the groove has a guiding portion for guiding the pushing portion to push the extrusion block.

[0022] Furthermore, an elastic member is provided between each of the extrusion blocks and the inner mold body, and the elastic member is used to drive the extrusion block to return from the second position to the first position.

[0023] Furthermore, it also includes two outer mold bodies arranged opposite to each other, and a clamping space for clamping the shell body is formed between the two outer mold bodies;

[0024] The outer mold body is provided with a limiting portion which is arranged in a one-to-one correspondence with the extrusion block, and the limiting portion can abut against the protrusion to limit the movement of the extrusion block.

[0025] Further, the limiting portion includes a limiting groove provided on the outer mold body; and / or,

[0026] The distance between the two outer mold bodies is adjustable.

[0027] Compared with the prior art, the utility model has the following advantages:

[0028] The shell processing device described in the utility model drives the force transmission rod to slide, so that the side wall part can be pushed outward by the pushing part to push the extrusion block, which is conducive to forming a bulge on the side wall part. The processing device has a simple structure, is easy to operate, and has a good processing effect.

[0029] In addition, the extrusion blocks are arranged in a plurality at intervals along the height direction of the inner mold body, which is conducive to using one force transmission rod to push multiple extrusion blocks at the same time, thereby facilitating the molding efficiency of the protrusions. The force transmission rods are arranged in two rows, and the two rows of force transmission rods are arranged in a staggered manner, which is conducive to molding multiple protrusions arranged in a staggered manner on both sides of the shell body, further improving the efficiency of molding the protrusions on the shell body. The provision of the groove on the force transmission rod is conducive to the accommodation of the end of the extrusion block, thereby facilitating the pushing effect of the pushing portion on the extrusion block.

[0030] In addition, by setting the guide part, it is beneficial to further improve the pushing effect of the pushing part on the extrusion block. By setting the elastic part between the extrusion block and the inner mold body, it is beneficial to drive the extrusion block back. The outer mold body clamps the shell body, and the setting of the limit part is beneficial to improve the processing effect of the protrusion. The structure of the limit groove is simple, easy to form the structure, and also beneficial to the forming effect of the protrusion; the adjustable spacing between the two outer mold bodies can realize the processing of shell bodies of different thicknesses, which is beneficial to improve the flexibility and versatility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0032] Figure 1 This is a schematic diagram of the structure of the battery cell housing according to the first embodiment of the utility model;

[0033] Figure 2 This is a schematic diagram of the structure of the two battery cell shells matching each other according to the first embodiment of the utility model;

[0034] Figure 3 for Figure 2 A magnified view of part A in FIG.

[0035] Figure 4 This is a schematic structural diagram of the inner mold body, the force transmission rod and the extrusion block according to the second embodiment of the utility model;

[0036] Figure 5 This is a schematic diagram of the structure of the structural device described in Embodiment 2 of the present utility model;

[0037] Figure 6 for Figure 5 Left view in;

[0038] Figure 7 for Figure 6 A schematic diagram of the structure of the extrusion block in the first position;

[0039] Figure 8 for Figure 6 Schematic diagram of the structure of the extrusion block in the second position.

[0040] Description of reference numerals:

[0041] 1. Shell body; 2. Inner mold body; 3. Force transmission rod; 4. Extrusion block; 5. Clamping block; 6. Spring;

[0042] 101, side wall portion; 102, side wall portion; 103, bottom wall; 104, protrusion;

[0043] 201, slide groove; 202, installation groove;

[0044] 301. groove; 302. push portion. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0046] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0048] Embodiment 1

[0049] This embodiment relates to a battery cell housing, the overall structure of which is as follows: Figure 1 As shown in , the battery cell housing includes a shell body 1 with an open end. The peripheral wall of the shell body 1 has two side wall parts 101 arranged opposite to each other along the thickness direction of the battery cell, and at least one side wall part 101 is formed with a protrusion 104 arched outward.

[0050] The peripheral wall of the shell body 1 further includes two side wall portions 102 arranged opposite to each other along the length direction of the shell body 1, and a bottom wall portion 103 arranged at the end of the shell body 1 relative to the opening. The two side wall portions 101 and the two side wall portions 102 are arranged in connection and constitute the peripheral wall of the shell body 1.

[0051] As a preferred embodiment, there are multiple protrusions 104 in this embodiment. Figure 1 As shown in , the protrusions 104 on the side wall portion 101 are arranged in multiple rows at intervals along the length direction of the shell body 1, and the protrusions 104 in each row are arranged in multiple rows at intervals along the height direction of the shell body 1. Figure 2 and Figure 3 As shown in , when the battery cells are arranged in the battery module, the protrusions 104 can abut against the adjacent battery cell shells, so that two adjacent battery cells are separated by multiple protrusions 104, thereby further improving the supporting and limiting effect of the two adjacent battery cells.

[0052] In addition, if Figure 1 As shown in , both side wall portions 101 are provided with protrusions 104, and the protrusions 104 on the side wall portions 101 are arranged in a staggered manner. Figure 2As shown in , the staggered arrangement of the multiple protrusions 104 on the two side wall portions 101 means that the projections of the multiple protrusions 104 on the two side wall portions 101 in the thickness direction of the shell body 1 do not overlap each other. This arrangement enables the multiple protrusions 104 on two adjacent shell bodies 1 to abut against each other, thereby facilitating the heat dissipation effect between two adjacent battery cells and further reducing the impact of thermal runaway.

[0053] The battery cell shell of the present embodiment is facilitated to provide limited support between two adjacent battery cell shells by forming a protrusion 104 that arches outward on at least one side wall portion 101 thereof, and can form a gap between two adjacent battery cells, and is conducive to reducing the contact area between the two adjacent battery cells, thereby facilitating the reduction of heat transfer between the two battery cells, thereby reducing the impact of thermal runaway, and also facilitating improving the heat dissipation effect of the battery cells. By directly forming the protrusion 104 on the side wall portion 101, the number of components is reduced, thereby facilitating improving assembly efficiency.

[0054] Embodiment 2

[0055] This embodiment relates to a shell processing device, which is used to process the battery cell shell in the first embodiment. Figures 4 to 6 As shown in the figure, the processing device includes an inner mold body 2 inserted in the shell body 1, an extrusion block 4 arranged in the inner mold body 2 and capable of sliding toward the side wall part 101, and a force transmission rod 3 slidably arranged on the inner mold body 2, and the outer periphery of the force transmission rod 3 is provided with a pushing portion 302 arranged corresponding to the extrusion block 4.

[0056] The extrusion block 4 has a first position in which the extrusion block 4 is accommodated in the inner mold body 2 and is located on one side of the push portion 302, and a second position in which the force transmission rod 3 is pushed by the push portion 302 and extends out of the inner mold body 2 when the force transmission rod 3 slides. In the second position, the extrusion block 4 can press the side wall portion 101 outward to form a protrusion 104 on the side wall portion 101.

[0057] The shell processing device of this embodiment drives the force transmission rod 3 to slide, and can push the extrusion block 4 outwardly through the pushing portion 302 to push the side wall portion 101, which is conducive to forming a protrusion 104 on the side wall portion 101. The processing device has a simple structure, is easy to operate, and has a good processing effect.

[0058] Based on the above overall introduction, an exemplary structure of the processing device shown in this embodiment is as follows Figure 3 and Figure 7 In this embodiment, the shape of the inner mold body 2 is adapted to the shape and specification of the inner cavity of the shell body 1, so that the shell body 1 can be supported, so that the structure of the shell body 1 is not easily deformed during the process of the extrusion block 4 extruding the side wall portion 101, so that the shell body 1 has better structural stability.

[0059] In order to facilitate the installation of the force transmission rod 3, a slide groove 201 is provided on the inner mold body 2, and the force transmission rod 3 is slidably arranged in the slide groove 201. Among them, the slide groove 201 is arranged along the height direction of the inner mold body 2, and the force transmission rod 3 slides into the slide groove 201 through the top opening of the slide groove 201, and can slide along the height direction of the inner mold body 2 under the driving of external force.

[0060] As a preferred embodiment, the cross section of the force transmission rod 3 is an oblong shape, and the cross section of the slide groove 201 is adapted to the force transmission rod 3. Figure 3 As shown in the figure, the cross-sections of the force transmission rod 3 and the slide groove 201 are both oblong. Under the guidance of the slide groove 201, the force transmission rod 3 can only slide along the height direction and cannot rotate around its own axis, which is beneficial to ensure that the pushing part 302 can be set corresponding to the extrusion block 4, and then can push the extrusion block 4 to slide.

[0061] The dowel rod 3 of this embodiment with an oblong cross section has the advantages of simple structure, easy layout and implementation, and good use effect. It should be noted that the dowel rod 3 of this embodiment can have a cross section other than an oblong shape, as long as it can prevent the dowel rod 3 from rotating relative to the inner mold body 2.

[0062] As a preferred embodiment, Figure 3 As shown in , the force transmission rod 3 is provided with a plurality of grooves 301 arranged at intervals along its length direction, and the push portion 302 is formed between two adjacent grooves 301. In other words, due to the arrangement of the grooves 301, the portion between two adjacent grooves 301 protrudes relative to the groove bottom of the groove 301, thereby achieving a push effect. The structure of the groove 301 here is simple, easy to process and shape, and the push effect of cooperating with the push portion 302 is good.

[0063] Benru Figure 3 As shown in the figure, the extrusion block 4 is columnar, and both ends of the extrusion block 4 are chamfered, which is conducive to improving the extrusion block 4 when extruding the side wall part 101, and it is easy to form a protrusion 104 on the side wall part 101. When the force transmission rod 3 slides, the extrusion block 4 can be pushed by the pushing part 302 to make the extrusion block 4 have better sliding stability.

[0064] To facilitate the installation of the extrusion block 4, a mounting groove 202 extending along the thickness direction is provided on the side of the inner mold body 2. One end of the mounting groove 202 is connected to the slide groove 201, and the other end of the mounting groove 202 is open. The extrusion block 4 is slidably arranged in the mounting groove 202. The structure of the mounting groove 202 here is simple and easy to arrange and implement.

[0065] For the convenience of the following description, the end of the extrusion block 4 used for extruding the side wall portion 101 is called the extrusion end, and the end of the extrusion block 4 used for receiving the push of the push portion 302 is called the push end. Figure 7 As shown in , when the extrusion block 4 is in the first position, the extrusion end is located in the installation groove 202, and the push end extends into the slide groove 201 and is located in a groove 301 thereof. At this time, the force transmission rod 3 is inserted into the slide groove 201, and a gap is formed between the bottom end of the force transmission rod 3 and the bottom end of the slide groove 201. Figure 8 As shown in , as the force transmission rod 3 slides downward, the pushing portion 302 can push the pushing end, thereby causing the extrusion block 4 to slide outward of the installation groove 202 , thereby extruding the side wall portion 101 , thereby forming a protrusion 104 on the side wall portion 101 .

[0066] In this embodiment, the groove wall of the groove 301 has a guiding portion for guiding the pushing portion 302 to push the extrusion block 4. Specifically, the guiding portion here is an arc surface provided on the upper and lower sides of the groove 301, and the arc surface is used to form a smooth transition between the pushing portion 302 and the groove 301, so as to guide the pushing portion 302 to push the extrusion block 4, so that the extrusion block 4 has better sliding stability.

[0067] In addition, an elastic member is provided between each extrusion block 4 and the inner mold body 2, and the elastic member is used to drive the extrusion block 4 to return from the second position to the first position. The provision of the spring 6 here is not only conducive to the return of the extrusion block 4, but also facilitates the loading and unloading of the inner mold body 2 in the shell body 1, thereby having a better use effect.

[0068] Specifically, the elastic member is a spring 6 disposed in the mounting groove 202 and sleeved outside the extrusion block 4. A limiting surface is provided corresponding to the end of the spring 6 facing the side wall portion 101, and a limiting block is provided on the outer periphery of the extrusion block 4 corresponding to the end of the spring 6 facing the slide groove 201, and the two ends of the spring 6 are respectively located between the limiting block and the limiting surface. The extrusion block 4 can be accommodated in the mounting groove 202 when the spring 6 is in the initial state, and compressed to store energy when the extrusion block 4 slides outward, thereby facilitating the return of the extrusion block 4.

[0069] As a preferred embodiment, the extrusion blocks 4 are arranged in a plurality at intervals along the height direction of the inner mold body 2, and the force transmission rod 3 is provided with a plurality of pushing parts 302 for pushing each extrusion block 4. Figure 3 As shown in , in this embodiment, by sliding a force transmission rod 3, a row of extrusion blocks 4 can be pushed simultaneously, thereby facilitating improving the processing efficiency of the protrusions 104.

[0070] In addition, in order to make the protrusions 104 arranged in multiple rows on the side wall portion 101, the extrusion blocks 4 are arranged in multiple rows spaced apart along the width direction of the shell body 1, and the multiple protrusions 104 in each row are spaced apart along the height direction of the shell body 1. At this time, multiple force transmission rods 3 can be slidably arranged on the inner mold body 2, and the number of force transmission rods 3 corresponds to the number of rows of the extrusion blocks 4. Such an arrangement can further improve the processing efficiency of the protrusions 104.

[0071] Furthermore, the shell processing device in this embodiment can also form the protrusions 104 on the two side wall parts 101 at the same time. Figure 5 As shown in , at this time, the force transmission rods 3 are arranged in two rows at intervals on the inner mold body 2, and the multiple force transmission rods 3 in the two rows are staggered along the length direction of the inner mold body 2, and the extrusion blocks 4 are multiple and slidably arranged on both sides of the inner mold body 2 corresponding to the force transmission rods 3 in each row. Here, the two rows of force transmission rods 3 are staggered, which is conducive to the staggered arrangement of the multiple protrusions 104 formed on the two side wall parts 101, thereby facilitating the support and matching effect between the two adjacent shells.

[0072] It is understandable that, during specific implementation, the position, quantity, etc. of the extrusion block 4 can be adjusted according to usage requirements. In this case, the position and quantity of the force transmission rod 3 can match the extrusion block 4.

[0073] like Figure 5 and Figure 6 As shown in , the shell processing device in this embodiment also includes two outer mold bodies 5 arranged opposite to each other, and a clamping space for clamping the shell body 1 is formed between the two outer mold bodies 5. The outer mold body 5 is provided with a limiting portion arranged in a one-to-one correspondence with the extrusion block 4, and the limiting portion can abut against the protrusion 104 to limit the movement of the extrusion block 4. The clamping of the shell body 1 by the outer mold body 5 is conducive to the cooperation with the inner mold body 2, thereby improving the stability of the shell body 1 during the molding process of the protrusion 104. The setting of the limiting portion is also conducive to preventing excessive extrusion of the extrusion block 4, so that the height of the protrusion 104 meets the design requirements.

[0074] In terms of specific structure, the limiting part includes a limiting groove provided on the inner wall of the installation half groove. As a preferred shape of the limiting groove, it is adapted to the shape of the protrusion 104, which is not only conducive to improving the limiting effect of the limiting groove on the extrusion block 4, but also conducive to improving the molding effect of the protrusion 104, and has good practicality.

[0075] In order to further improve the use effect of the processing device, the distance between the two outer mold bodies 5 is adjustable. For example, in a specific implementation, the two outer mold bodies 5 are connected by bolts passing through the two and nuts screwed with the bolts. At this time, the distance between the two outer mold bodies 5 can be changed according to the thickness of the shell body 1 to meet the processing requirements of shell bodies 1 with different thicknesses. Of course, in addition to bolts and nuts, other structures that are conducive to changing the distance between the two outer mold bodies 5 can also be used, as long as the use requirements are met.

[0076] When the shell processing device in this embodiment is used, the inner mold body 2 is first prepared so that the force transmission rod 3 is located in the corresponding slide groove 201 and the extrusion block 4 is accommodated in the corresponding installation groove 202. Then, the inner mold body 2 equipped with the extrusion block 4 and the force transmission rod 3 is installed in the shell body 1, and then the shell body 1 is clamped in the clamping space.

[0077] By applying external force to the force transmission rods 3, each force transmission rod 3 slides downward, and then pushes each extrusion block 4 to slide, so that the extrusion block 4 slides from the first position to the second position, and with the cooperation of the limiting groove, a plurality of protrusions 104 are formed on the side wall portion 101. Then the force transmission rods 3 are driven to reset, and at this time, the extrusion block 4 slides from the second position to the first position under the action of the spring 6. Finally, after releasing the clamping of the outer mold body 5 on the shell body 1, the inner mold body 2 can be taken out.

[0078] The shell processing device of this embodiment has the advantages of simple structure, easy operation, and good molding effect, and has good promotion significance. The above description is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery cell casing, characterized in that: The battery comprises a shell body with an open end, wherein the peripheral wall of the shell body comprises two side wall parts which are arranged oppositely along the thickness direction of the battery core, and at least one of the side wall parts is formed with a protrusion which arches outwards.

2. The battery cell casing according to claim 1, characterized in that: The protrusions are multiple and spaced apart; and / or, The protrusions are provided on both side wall parts, and the protrusions on the two side wall parts are arranged in a staggered manner.

3. A shell processing device, characterized in that: The processing device is used to process the battery cell shell according to claim 1 or 2; The processing device comprises an inner mold body inserted in the shell body, an extrusion block arranged in the inner mold body and capable of sliding toward the side wall portion, and a force transmission rod slidably arranged on the inner mold body, and the outer periphery of the force transmission rod is provided with a push portion arranged corresponding to the extrusion block; The extrusion block has a first position in which it is accommodated in the inner mold body and located on one side of the pushing portion, and a second position in which when the force transmission rod slides, it is pushed by the pushing portion and extends out of the inner mold body. In the second position, the extrusion block can extrude the side wall portion outward to form the protrusion on the side wall portion.

4. The shell processing device according to claim 3, characterized in that: The extrusion blocks are multiple and spaced apart along the height direction of the inner mold body, and the force transmission rod is provided with multiple pushing parts respectively used for pushing the extrusion blocks.

5. The shell processing device according to claim 4, characterized in that: The force transmission rods are arranged in two rows at intervals on the inner mold body, and a plurality of the force transmission rods in the two rows are staggered along the length direction of the inner mold body; The extrusion blocks are a plurality of blocks slidably disposed on both sides of the inner mold body corresponding to the force transmission rods in each column.

6. The shell processing device according to claim 3, characterized in that: The force transmission rod is provided with a plurality of grooves arranged at intervals along its length direction, and the push portion is formed between two adjacent grooves; In the first position, the end of the extrusion block is located in the corresponding groove.

7. The shell processing device according to claim 6, characterized in that: The groove wall of the groove has a guide portion for guiding the pushing portion to push the extrusion block.

8. The shell processing device according to claim 3, characterized in that: An elastic member is provided between each of the extrusion blocks and the inner mold body, and the elastic member is used to drive the extrusion block to return from the second position to the first position.

9. The shell processing device according to any one of claims 3 to 8, characterized in that: It also includes two outer mold bodies arranged opposite to each other, and a clamping space for clamping the shell body is formed between the two outer mold bodies; The outer mold body is provided with a limiting portion which is arranged in a one-to-one correspondence with the extrusion block, and the limiting portion can abut against the protrusion to limit the movement of the extrusion block.

10. The shell processing device according to claim 9, characterized in that: The limiting portion includes a limiting groove provided on the outer mold body; and / or, The distance between the two outer mold bodies is adjustable.

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