Electrode structure

Abstract

The utility model discloses an electrode structure and a transverse waterway used for machining a finish-drawing punch, the finish-drawing punch is used for machining a battery shell, the finish-drawing punch comprises at least two longitudinal waterways, and the electrode structure comprises a supporting rod used for stretching into one of the longitudinal waterways; and the electrode body is connected to the supporting rod and is used for being electrified and generating current so as to break down the two adjacent longitudinal water paths to form a transverse water path. According to the embodiment of the utility model, the electrode structure extends into the longitudinal waterways of the finish-broaching punch, and the electrode body is electrified to generate current, so that the two adjacent longitudinal waterways are broken down to form the transverse waterways, and the machining of the S-shaped waterways in the finish-broaching punch can be completed without contacting the working surface of the finish-broaching punch in the machining process; therefore, the working surface of the finish-drawing punch is not damaged, and the heat in the continuous drawing process of the finish-drawing punch is timely guided out.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery processing, in particular to an electrode structure. Background Art

[0002] The manufacturing process of new energy square battery shell mainly consists of in-mold stamping and stretching, cleaning, drying, testing and other links, among which the most core process is in-mold stamping and stretching. In the process of in-mold stamping and stretching, the fine drawing process is the most important process, which determines the size and quality of the product.

[0003] The fine drawing punch (also called the fine drawing punch or stretching punch) is an important die in the fine drawing process. During the continuous stretching process, the temperature of the punch continues to rise due to the thinning of the material, and the size of the punch changes, which eventually leads to unstable product size and easy appearance defects. In order to ensure that the heat of the fine drawing punch is timely discharged during the continuous stretching process, a heat dissipation water channel needs to be set inside the fine drawing punch, and the S-type heat dissipation water channel has the best heat dissipation effect.

[0004] Since no holes are allowed to appear in the front, back, left, right and bottom areas of the battery case fine-drawing punch that contact the product, the conventional S-type heat dissipation water channel processing solution will contact the tooling surface of the fine-drawing punch, which is easy to damage the tooling surface of the fine-drawing punch, thereby affecting the appearance of the product, resulting in the S-type heat dissipation water channel being difficult to use in the fine-drawing punch. Utility Model Content

[0005] The utility model aims to provide an electrode structure, aiming to solve the problem that the S-shaped water channel processing device in the prior art may damage the tooling surface in the fine drawing punch.

[0006] The present utility model provides an electrode structure for processing a transverse water channel of a fine drawing punch, wherein the fine drawing punch is used to process a battery shell, the fine drawing punch comprises at least two longitudinal water channels, and the electrode structure comprises:

[0007] A support rod, used to extend into one of the longitudinal waterways;

[0008] The electrode body is connected to the support rod and is used for being energized and generating current to break through two adjacent longitudinal waterways to form a transverse waterway.

[0009] Optionally, the electrode body includes a connecting portion and a guiding portion; the connecting portion is connected to the support rod, and the guiding portion is connected to the connecting portion and is protruding from one side of the support rod.

[0010] Optionally, a boss is provided on the guide portion, and the boss is provided to protrude in the axial direction of the support rod relative to the connecting portion.

[0011] Optionally, a side wall of the support rod close to the boss is in surface contact with one surface of the boss.

[0012] Optionally, the side wall of the support rod away from the boss is a plane.

[0013] Optionally, the connecting portion is fixedly connected to the end of the support rod through a first connecting member.

[0014] Optionally, the first connecting member is connected to the end of the support rod in the axial direction of the support rod.

[0015] Optionally, the connecting portion is fixedly connected to the middle portion of the support rod via a second connecting member.

[0016] Optionally, the support rod is a cylindrical structure or a square column structure.

[0017] Optionally, the support rod is made of metal.

[0018] The embodiment of the utility model extends the electrode structure into the longitudinal water channel of the fine drawing punch, and the electrode body in the electrode structure is energized to generate current, so that the two adjacent longitudinal water channels are punctured, thereby forming a transverse water channel. During the processing, it is not necessary to contact the working surface of the fine drawing punch, and the processing of the S-shaped water channel in the fine drawing punch can be completed, so the working surface of the fine drawing punch will not be damaged, thereby ensuring that the heat in the continuous stretching process of the fine drawing punch is promptly discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of an S-shaped water channel inside a battery shell fine drawing punch provided in an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the structure of a battery shell fine drawing punch provided by an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the structure of the electrode structure provided by an embodiment of the utility model;

[0023] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the local A in the middle;

[0024] Figure 5A schematic diagram of the structure of the electrode body provided in an embodiment of the utility model;

[0025] Figure 6 A schematic structural diagram of an electrode body from another perspective provided in an embodiment of the utility model;

[0026] Figure 7 Another schematic diagram of the electrode structure provided by the embodiment of the utility model;

[0027] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of the local B in the middle;

[0028] Fig. 9 A schematic diagram of the working principle of the electrode structure provided by the embodiment of the utility model;

[0029] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure of the local C in the middle;

[0030] Fig.11 A schematic structural diagram of a support rod provided in an embodiment of the utility model.

[0031] Description of the symbols in the figure:

[0032] 1. Fine drawing punch; 11. Horizontal waterway; 111. Upper horizontal waterway; 112. Lower horizontal waterway; 12. Longitudinal waterway; 13. Longitudinal water inlet; 14. Longitudinal water outlet;

[0033] 2. electrode structure; 21. support rod; 211. flat position; 22. electrode body; 221. connecting part; 222. guide part; 2221. boss;

[0034] 3. The first connecting piece. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0037] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0038] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0039] like Figure 1 and Figure 2 The figure is a schematic diagram of the structure of the fine drawing punch 1 for processing the battery shell and its internal S-shaped water channel. The S-shaped water channel includes a transverse water channel 11 and a longitudinal water channel 12. The single complete water channel of the fine drawing punch 1 of the battery shell is composed of an upper transverse water channel 111, a lower transverse water channel 112 and a longitudinal water channel 12 in an S-shaped staggered manner. During the continuous stretching process of the fine drawing punch, the coolant enters from the longitudinal water inlet 13 of the fine drawing punch 1, passes through the internal S-shaped water channel, and flows out from the longitudinal water outlet 14, so that the heat inside the fine drawing punch is exchanged by the coolant during continuous production, thereby achieving the purpose of temperature control.

[0040] Among them, the longitudinal water channel 12 can be processed by the conventional deep hole drilling process in the prior art, that is, a CNC machine tool with a large stroke in the Z direction and a specially made extended drill bit are used to process the longitudinal water channel 12 of the fine drawing punch 1, while the transverse water channel 11 is processed by the discharge of the electrode structure 2 in the following embodiments. The following embodiments specifically explain the specific structure of the electrode structure 2 and the process of energizing and generating current to break through two adjacent longitudinal water channels 12 to form a transverse water channel 11.

[0041] Combination Figures 1 to 3The embodiment of the utility model provides an electrode structure 2 for processing the transverse water channel 11 of the fine drawing punch 1. The fine drawing punch 1 is used to process the battery shell. The fine drawing punch 1 includes at least two longitudinal water channels 12. The electrode structure 2 includes: a support rod 21, which is used to extend into one of the longitudinal water channels 12; an electrode body 22, and the electrode body 22 is connected to the support rod 21, which is used to energize and generate current to break through the two adjacent longitudinal water channels 12 to form the transverse water channel 11. The design of the support rod 21 enables it to smoothly extend into one of the longitudinal water channels 12 of the fine drawing punch 1, so that the electrode body 22 can reach the specified position in the longitudinal water channel 12. The electrode body 22 is connected to the support rod 21, which can be energized and generate current. When the electrode body 22 is energized, it will generate an electric field, which can break through the material between the two adjacent longitudinal water channels 12, thereby forming a transverse water channel 11 between them, and the transverse water channel 11 is connected to the two adjacent longitudinal water channels 12, which greatly improves the processing efficiency and quality.

[0042] In this embodiment, by extending the electrode structure 2 into the longitudinal waterway 12 of the fine drawing punch 1, the electrode body 22 in the electrode structure 2 is energized to generate current, so that the two adjacent longitudinal waterways 12 are broken down, thereby forming a transverse waterway 11. During the processing, it is not necessary to contact the working surface of the fine drawing punch, so the S-shaped waterway processing in the fine drawing punch can be completed, so the working surface of the fine drawing punch will not be damaged, and the S-shaped waterway processing in the fine drawing punch 1 can be completed, thereby ensuring that the heat in the continuous stretching process of the fine drawing punch 1 is timely discharged. In the process of the electrode structure 2 breaking through the transverse waterway, the upper end of the support rod 21 is connected to the fixed clamp of the discharge device. At this time, the upper end of the support rod 21 exceeds the position of the longitudinal water inlet 13 of the fine drawing punch 1, that is, it is located outside the longitudinal waterway 12, and the fixed clamp can control the support rod 21 to move along the xyz direction.

[0043] Further, such as Figure 4 As shown, the electrode body 22 includes a connecting portion 221 and a guiding portion 222; the connecting portion 221 is connected to the support rod 21, and the guiding portion 222 is connected to the connecting portion 221 and is protruded relative to one side of the support rod 21. In this embodiment, the connecting portion 221 and the guiding portion 222 jointly determine the depth of the transverse waterway 11 formed by the two adjacent longitudinal waterways 12, that is, the connecting portion 221 and the guiding portion 222 determine the height of the discharge area of ​​the electrode body 22. The protruding design of the guiding portion 222 enables the guiding portion 222 to play a guiding and positioning role during the processing. The side of the connecting portion 221 to which the guiding portion 222 is connected will be the side toward which the guide portion 222 will be penetrated when the power is turned on, ensuring that the current can accurately act on the position to be processed.

[0044] Specifically, since the support rod 21 extends toward the depth direction of the longitudinal waterway 12, that is, the length direction of the longitudinal waterway 12, and the guide portion 222 is connected to the connection portion 221 and is protruded relative to one side of the support rod 21, the guide portion 222 is arranged toward the width direction of the support rod 21, and because the connection portion 221 is connected to the support rod 21, the guide portion 222 can be arranged on the left side of the connection portion 221 or on the right side of the connection portion 221. That is, when the guide portion 222 is connected to the left side of the connection portion 221, the support rod 21 extends into the longitudinal waterway 12 to start processing the transverse waterway 11, and the guide portion 222 moves to the left to form a transverse waterway 11 extending to the left, and when the guide portion 222 is connected to the right side of the connection portion 221, the support rod 21 extends into the longitudinal waterway 12 to start processing the transverse waterway 11, and the guide portion 222 moves to the right to form a transverse waterway 11 extending to the right. In specific implementation, the same electrode structure 2 can be used. When it is necessary to discharge in different directions of the longitudinal water channel 12, it is only necessary to rotate the direction of the electrode structure 2 to face the corresponding direction.

[0045] Further, such as Figure 5 As shown, a boss 2221 is provided on the guide portion 222, and the boss 2221 is provided protrudingly in the axial direction of the support rod 21 relative to the connection portion 221, for example, provided at the upper end of the guide portion 222 or the lower end of the guide portion 222. In this embodiment, the provision of the boss 2221 deepens the height of the discharge area of ​​the electrode body 22. The higher the height of the discharge area of ​​the electrode body 22, the deeper the depth of the transverse waterway 11. Therefore, whether the boss 2221 is provided at the upper end of the guide portion 222 or at the lower end of the guide portion 222, the height of the discharge area of ​​the electrode body 22 can be deepened, or the boss 2221 can be provided at both the upper end and the lower end of the same side of the guide portion 222 to further deepen the height of the discharge area of ​​the electrode body 22.

[0046] In this embodiment, the overall structure composed of the support rod 21 , the connecting portion 221 , the guiding portion 222 and the boss 2221 is an L-shaped electrode structure.

[0047] In this embodiment, the side wall of the support rod 21 close to the boss 2221 is in surface contact with one side of the boss 2221. The purpose of this design is to make the side wall of the support rod 21 close to the boss 2221 have a larger contact area with one side of the boss 2221, so that the alignment and fixation between the support rod 21 and the boss 2221 are more stable. The surface contact can be a plane contact, for example, the side wall of the support rod 21 close to the boss 2221 is a vertical plane, and the side of the boss 2221 close to the support rod 21 is also a vertical plane; the surface contact can be an inclined surface contact, for example, the side wall of the support rod 21 close to the boss 2221 is an inclined surface, and the side of the boss 2221 close to the support rod 21 is an adapted inclined surface; or the surface contact can also be an arc surface contact, for example, the side wall of the support rod 21 close to the boss 2221 is an outer convex arc surface, and the side of the boss 2221 close to the support rod 21 is a matching inner concave arc surface.

[0048] Furthermore, the side wall of the support rod 21 close to the boss 2221 and the side wall of the support rod 21 away from the boss 2221 are both vertical planes. In this embodiment, both side walls of the support rod 21 are designed as vertical plane structures. Such a design shortens the overall width of the electrode structure 2, making it easier for it to enter the longitudinal waterway 12, generate current to break through when powered, so that the transverse waterway 11 is formed between two adjacent longitudinal waterways 12.

[0049] Further, such as Figure 4 As shown, the connecting portion 221 is fixedly connected to the end of the support rod 21 by the first connecting member 3. The first connecting member 3 can be a screw, a rivet, a positioning pin, etc. Specifically, the support rod 21 and the connecting portion 221 are fixed together by fixing screws. It should be noted that the first connecting member 3 has a precise size and shape, which can ensure that the connecting portion 221 and the support rod 21 are accurately aligned and fixedly connected together. The shape of the cross section of the connecting portion 221 can be designed to be the same or similar to the cross-sectional shape of the support rod 21, so that the connecting portion 221 does not affect the electrode structure 2 from entering the longitudinal waterway 12.

[0050] In this embodiment, the first connecting member 3 is connected to the end of the support rod 21 from the axial direction of the support rod 21. Connecting from the axial direction means that the first connecting member 3 is installed along the length direction of the support rod 21, and the connecting portion 221 is fixed to the end of the support rod 21 (i.e., a position close to the lower end of the support rod 21), which can ensure a close fit and a firm connection between the connecting portion 221 and the support rod 21, reduce the overall width of the electrode structure 2, make the electrode structure 2 more compact, and only extend the length slightly in the length direction. When processing, only the insertion depth of the electrode structure 2 needs to be adjusted, which does not affect the processing of the transverse waterway.

[0051] In the above embodiment, combined with Figure 1 , Figures 3 to 6As shown, when it is necessary to process the lower transverse waterway 112, the support rod 21 is extended into the longitudinal waterway 12 so that the electrode body 22 reaches the designated position below. When it is necessary to process the upper transverse waterway 111, it is only necessary to control the fixed clamp to pull up the support rod 21 for a distance so that the support rod 21 moves upward until the electrode body 22 moves to the upper designated position where the upper transverse waterway 111 can be processed, and the upper transverse waterway 111 can be processed. Thus, the transverse waterways at the upper and lower positions are processed using the same electrode structure 2. In another embodiment, the connecting portion 221 can also be fixedly connected to the middle of the support rod 21 through the second connecting member, so that when it is necessary to process the upper transverse waterway 111, the position of the support rod 21 can be not adjusted, and the support rod 21 can be directly inserted at the same depth. At this time, the second connecting member can fix the connecting portion 221 on the support rod 21 from the side of the support rod 21.

[0052] In some embodiments, the electrode body 22 may be provided only at the end of the support rod 21, or only at the middle of the support rod 21. The electrode body 22 may even be provided at both the end and the middle of the support rod 21, so that the upper transverse waterway 111 and the lower transverse waterway 112 may be processed simultaneously, and of course, the power-on sequence may be controlled to process the upper transverse waterway 111 and the lower transverse waterway 112 in sequence.

[0053] like Figures 7 to 10 As shown, it is a schematic diagram of the working principle of the electrode structure 2, where a is set as the total width of the electrode body 22, b is set as the maximum discharge depth of the electrode body 22, c is set as the discharge area height of the electrode body 22, d is set as the total height of the electrode structure 2, e is set as the minimum spacing between two adjacent longitudinal waterways 12, f is set as the diameter of the longitudinal waterway 12, g is set as the maximum depth of the longitudinal waterway 12, and s is set as the effective discharge depth of the electrode body 22.

[0054] The electrode structure 2 in this embodiment needs to ensure that the total height d of the L-shaped electrode structure is greater than the maximum depth g of the longitudinal waterway 12, and the total width a of the L-shaped electrode structure is less than the diameter f of the longitudinal waterway 12, so that the electrode can be smoothly placed in the longitudinal water inlet 13 of the longitudinal waterway 12.

[0055] In a specific embodiment, the electrode structure 2 is placed vertically into the longitudinal water channel 12 to a specified depth, the support rod 21 is exposed from the longitudinal water inlet 13, and is fixed in the fixed jaws of the discharge operation device, and the fixed jaws can move along the xyz direction according to the settings. The discharge device is operated to move the electrode structure 2 laterally so that the boss 2221 contacts the side wall of the longitudinal water channel 12, and the contact serves as the discharge starting position. When setting the effective discharge depth s, it is necessary to ensure that e / 2 < s to ensure that the next discharge can penetrate; and it is necessary to ensure that s < b to avoid the support rod 21 contacting the side wall of the longitudinal water channel 12 and causing damage to the water channel. Start the discharge switch, at this time, the electrode body 22 will move laterally while discharge machining until the effective discharge depth s is reached and the discharge stops.

[0056] After the discharge device restores the electrode body 22 to its initial fixed position, the L-shaped electrode structure is taken out and placed into an adjacent longitudinal waterway 12 . The above operation is repeated so that the electrode body 22 discharges and penetrates the other two adjacent longitudinal waterways 12 to form a transverse waterway 11 .

[0057] Repeat the above operation until all the upper transverse water channels 111 and the lower transverse water channels 112 are opened, and the processing of the S-shaped water channel in the fine drawing punch is completed.

[0058] In this embodiment, the support rod 21 is a cylindrical structure or a square column structure. The shape of the support rod 21 depends on the size and depth of the longitudinal waterway 12. Therefore, the shape of the support rod 21 needs to match the size of the longitudinal waterway 12. That is, the shape of the support rod 21 should be selected to ensure that it can adapt to and be stably placed in the longitudinal waterway 12 without being too large or too small.

[0059] When the support rod 21 is a cylindrical structure, Fig.11 As shown, in order to make the side wall of the support rod 21 close to the boss 2221 have a larger contact area with one side of the boss 2221, so that the alignment and fixation between the support rod 21 and the boss 2221 are more stable, and the overall width of the electrode structure 2 can be shortened, so that it is easier to enter the longitudinal waterway 12, and energize to generate current to break down and form the transverse waterway 11, the two side walls of the support rod 21 are designed to be flat 211, so that the side wall of the support rod 21 close to the boss 2221 and the side wall of the support rod 21 away from the boss 2221 are both vertical planes.

[0060] The support rod 21 is made of metal, which has good electrical conductivity and corrosion resistance. Specifically, the support rod 21 can be made of steel or aluminum alloy. When the electrode structure 2 is inserted into the longitudinal waterway 12 for processing, the fixed clamp of the discharge operation device fixes the support rod 21. At this time, the discharge operation device discharges, and the support rod 21 conducts electricity to make the electrode body energized to generate current, so that the two adjacent longitudinal waterways 12 can be broken down to form the transverse waterway 11.

[0061] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0062] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive.

[0063] Inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "including a..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. An electrode structure for processing a transverse water channel of a fine drawing punch, wherein the fine drawing punch is used to process a battery shell, and the fine drawing punch comprises at least two longitudinal water channels, characterized in that: The electrode structure comprises: A support rod, used to extend into one of the longitudinal waterways; The electrode body is connected to the support rod and is used for being energized and generating current to break through two adjacent longitudinal waterways to form a transverse waterway.

2. The electrode structure according to claim 1, characterized in that: The electrode body comprises a connecting portion and a guiding portion; the connecting portion is connected to the supporting rod, and the guiding portion is connected to the connecting portion and is protruded relative to one side of the supporting rod.

3. The electrode structure according to claim 2, characterized in that: A boss is arranged on the guide portion, and the boss is arranged to protrude in the axial direction of the support rod relative to the connecting portion.

4. The electrode structure according to claim 3, characterized in that: The side wall of the support rod close to the boss is in surface contact with one surface of the boss.

5. The electrode structure according to claim 4, characterized in that: The side wall of the support rod away from the boss is a vertical plane.

6. The electrode structure according to claim 2, characterized in that: The connecting portion is fixedly connected to the end of the supporting rod through a first connecting member.

7. The electrode structure according to claim 6, characterized in that: The first connecting member is connected to the end of the supporting rod in the axial direction of the supporting rod.

8. The electrode structure according to claim 2, characterized in that: The connecting portion is fixedly connected to the middle portion of the supporting rod through a second connecting member.

9. The electrode structure according to any one of claims 1 to 8, characterized in that: The support rod is a cylindrical structure or a square column structure.

10. The electrode structure according to any one of claims 1 to 8, characterized in that: The support rod is made of metal.

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