Shaping tool for battery shell
By designing the outer expansion section of the battery casing and the outer expansion section of the inner pressure assembly, the problem of fitting accuracy between the cover plate and the casing of the blade battery casing was solved, thus improving the product yield.
Patent Information
- Application Number
- CN202423118350.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-17
AI Technical Summary
The blade battery has a low fit between the cover and the casing, and the flatness of the large surface of the casing material affects the final fit accuracy and product yield.
Design a shaping fixture for a battery casing, including an outer expansion section and an inner pressure section. Through a multi-stage shaping structure of the outer expansion layer and the inner pressure layer, the two ends of the battery casing are shaped by outer expansion and inner pressure respectively, ensuring the consistency and accuracy of the openings.
It effectively improves the consistency of the shell opening, ensures a good fit between the cover and the shell, and improves the product yield.
Smart Images
Figure CN223603178U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the blade battery manufacturing technical field especially relates to an opening shaping frock. BACKGROUND
[0002] In recent years, the state vigorously supports new energy industry, especially lithium ion battery driven new energy automobile has become an important trend of industry development, and the proportion in the market gradually increases, is becoming the mainstream development direction. In the production process of lithium ion battery, the current mainly has two types of soft package battery and aluminum shell battery, and in the Chinese market, the application of aluminum shell battery occupies the dominant position.
[0003] In the aluminum shell battery, the blade battery can effectively improve the safety of the battery, increase the energy density of the battery and help to realize the CTP (Cell to Pack, battery monomer direct assembly) structure of the battery pack due to its unique blade structure, so it becomes an important lithium battery structure form. However, the shell of the blade battery usually adopts an ultra-thin structure, which leads to low matching precision between the cover plate and the shell. In addition, the large surface flatness problem of the shell raw material also affects the final shell cover matching precision and product yield. SUMMARY
[0004] The utility model discloses a battery shell shaping frock, solve above technical problem,
[0005] A battery shell shaping frock, comprising,
[0006] The shell outer expansion part can be controlled to be inserted into the first end of the battery shell, the shell outer expansion part includes a plurality of outer expansion layers connected in sequence along the first direction, the first outer expansion layer is arranged outside the first end, and the tail outer expansion layer is embedded inside the first end.
[0007] The shell inner pressure part can be controlled to be sleeved on the second end of the battery shell, the shell inner pressure part includes a plurality of inner pressure layers connected in sequence along the first direction, and the second end can be controlled to be arranged in the inner pressure layer.
[0008] Preferably, the battery shell includes four rectangular sides, one of the rectangular sides is provided with a protrusion on the inner side and the outer side along the length direction of the battery shell, a first R angle is arranged between the rectangular sides, and the diameter of the first R angle is 1mm-5mm.
[0009] Preferably, the outer expansion layer includes an upper and lower symmetrical outer expansion wide surface and a left and right symmetrical outer expansion narrow surface, and the outer expansion wide surface and the outer expansion narrow surface are both trapezoidal inclined surfaces.
[0010] Preferably, the side surface of the outer expansion layer embedded in the inside of the first end is provided with a first groove matched with the protrusion, and the first groove is at the same horizontal height as the protrusion.
[0011] The inside surface of the first outer expansion layer is provided with a second groove matched with the protrusion, and the second groove is at the same horizontal height as the protrusion.
[0012] Preferably, the outer expansion layer is provided with an outer expansion opening close to the first end, and the outer expansion openings of the plurality of outer expansion layers are sequentially reduced along the first direction.
[0013] The inner pressure layer is provided with an inner pressure opening close to the second end, and the inner pressure openings of the plurality of inner pressure layers are sequentially reduced along the first direction.
[0014] Preferably, a second R angle is arranged between the outer expansion wide surface and the outer expansion narrow surface, and the diameter of the second R angle is 0.1mm-0.3mm smaller than the diameter of the first R angle.
[0015] Preferably, the inner pressure layer comprises an upper and lower symmetrical inner pressure wide surface and a left and right symmetrical inner pressure narrow surface, and the inner pressure wide surface and the inner pressure narrow surface are both trapezoidal inclined surfaces.
[0016] Preferably, the inner side surface of the inner pressure layer is provided with a third groove matched with the protrusion, and the third groove is at the same horizontal height as the protrusion.
[0017] Preferably, the thickness of the inner pressure wide surface is greater than the thickness of the inner pressure narrow surface.
[0018] A third R angle is arranged between the inner pressure wide surface and the inner pressure narrow surface, and the diameter of the third R angle is 0.1mm-0.3mm smaller than the diameter of the first R angle.
[0019] Preferably, the spacing between the outer expansion layers is 1mm-5mm, and the spacing between the inner pressure layers is 1mm-5mm.
[0020] The beneficial effects of the battery shell are as follows: the shell expansion part is used for expanding and shaping one end of the battery shell, the shell contraction part is used for contracting and shaping the other end of the battery shell, the problem of poor consistency of the shell opening large surface is effectively solved, the assembly can be better matched with the cover plate, and the product yield is improved. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 is an assembly drawing of the shaping tool of the battery shell of the utility model;
[0022] Figure 2 is a schematic view of the battery shell of the utility model;
[0023] Figure 3 This is a schematic diagram of the outer expansion portion of the shell of this utility model;
[0024] Figure 4 This is a schematic diagram of the internal pressure section of the housing of this utility model.
[0025] In the attached figures: 1. Outer expansion of the casing; 11. Outer expansion layer; 111. Outer expansion wide surface; 112. Outer expansion narrow surface; 113. First groove; 114. Second groove; 115. Second radius (R-angle); 116. Outer expansion step stop; 2. Battery casing; 21. Rectangular side; 22. Protrusion; 23. First radius (R-angle); 3. Inner pressure part of the casing; 31. Inner pressure layer; 311. Inner pressure wide surface; 312. Inner pressure narrow surface; 313. Third radius (R-angle); 314. Inner pressure step stop. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.
[0029] A shaping fixture for battery casings, such as Figures 1 to 4 As shown, including,
[0030] The outer casing expansion portion 1 is controllably inserted into the first end of the battery casing 2. The outer casing expansion portion 1 includes multiple expansion layers 11 connected sequentially along a first direction (i.e., the direction indicated by arrow A). The first expansion layer 11 is located on the outside of the first end, and the expansion layer 11 at the tail end is embedded inside the first end.
[0031] The inner pressure part 3 is controllably covered on the second end of the battery housing 2. The inner pressure part 3 includes a plurality of inner pressure layers 31 connected in sequence along the first direction, and the second end is controllably disposed within the inner pressure layer 31.
[0032] Specifically, the utility model provides a kind of shaping tool of battery shell, by shell outer expansion part 1, shell inner pressure part 3 together cooperation is directed to battery shell 2 shaping, shell outer expansion part 1 has multiple outer expansion layers 11, shell inner pressure part 3 has multiple inner pressure layers 31, by shell outer expansion part 1 to the one end of battery shell 2 is shaped, by shell inner pressure part 3 to the other end of battery shell 2 is shaped, can optimize shell opening size, so that opening is more standardized, effectively solve the problem of shell opening large face consistency, can better cooperate with cover plate to complete assembly, to improve product optimization rate.
[0033] The outer expansion opening of the plurality of outer expansion layers 11 gradually decreases along the first direction, the outer expansion layer 11 of the tail portion is embedded in the interior of the first end, and the first outer expansion layer 11 is arranged on the outside of the first end. According to the size of the battery shell 2, the shell outer expansion part 1 is controllably movable along the first direction into the first end until it stops moving after reaching the preset opening size of the first end.
[0034] The inner pressure opening of the plurality of inner pressure layers 31 gradually decreases along the first direction, the first inner pressure layer 31 is sleeved on the second end of the battery shell 2, and according to the size of the battery shell 2, the shell inner pressure part 3 is controllably movable along the second direction opposite to the first direction until it stops moving after reaching the preset opening size of the second end. The utility model can be used to prepare a high-frequency welded blade shell that meets the production requirements. The aluminum shell can be made to be 0.3 mm, the steel shell can be made to be 0.05 mm, and the specific size of the composite shell needs to be determined according to the material.
[0035] In a preferred embodiment, referring to Figure 2 , the battery shell 2 includes four rectangular sides 21, and the inner side and the outer side of one of the rectangular sides 21 are provided with a protrusion 22 along the length direction of the battery shell 2. The first R angle 23 is arranged between the rectangular sides 21, and the diameter of the first R angle is 1 mm-5 mm.
[0036] Specifically, the battery shell 2 is designed according to product requirements, and a shell meeting the size requirements is prepared in advance. The shell is prepared by high-frequency welding, so that the narrow side of the shell has a protrusion 22.
[0037] The shell outer expansion part 1 is inserted into the interior of the first end of the battery shell 2, and plays a role of fixing and expanding the shell opening, avoiding the problem of concave or small size of the shell. The internal expansion space distance is determined in cooperation with the external size and the shell measurement size.
[0038] The shell inner pressure part 3 is sleeved on the surface of the second end of the battery shell 2, and plays a role of shrinking the shell opening, avoiding the problem of excessive size of the shell. The external compression space distance needs to be determined in cooperation with the internal size and the shell test size.
[0039] The thickness of the battery shell 2 is in the range of 0.1mm-1mm, the material of the battery shell 2 includes aluminum shell, steel shell and other different materials, the diameter of the first R angle 23 is in the range of 1mm-5mm, which ensures the maximum utilization efficiency of the shell internal space.
[0040] The shell material is high-frequency welded and mutually dissolved, which may cause high-frequency welding convex welding mark, i.e. convex 22, the outer convex size is trimmed by using inner and outer scraping wire technology, and the outer convex value is ensured to be within a certain tolerance range.
[0041] In a preferred embodiment, referring to Figure 3 , the outer expansion layer 11 includes an upper and lower symmetrical outer expansion wide surface 111 and a left and right symmetrical outer expansion narrow surface 112, and the outer expansion wide surface 111 and the outer expansion narrow surface 112 are both trapezoidal inclined surfaces, forming a trapezoidal structure for expansion;
[0042] The side surface of the outer expansion layer 11 embedded in the first end is provided with a first groove 113 matched with the convex 22, and the first groove 113 is at the same horizontal height as the convex 22;
[0043] The inner side surface of the first outer expansion layer 11 is provided with a second groove 114 matched with the convex 22, and the second groove 114 is at the same horizontal height as the convex 22;
[0044] The outer expansion layer 11 is provided with an outer expansion opening near the first end, and the outer expansion openings of the plurality of outer expansion layers 11 are sequentially reduced along the first direction;
[0045] The inner pressure layer 31 is provided with an inner pressure opening near the second end, and the inner pressure openings of the plurality of inner pressure layers 31 are sequentially reduced along the first direction.
[0046] Specifically, the shell expansion part 1 includes a multi-stage outer expansion trapezoidal structure, which facilitates one-time, two-time or multiple-time outer expansion shaping of the battery shell 2, and can inhibit stress rebound after the shell is stressed and constrained.
[0047] The outer expansion wide surface 111 and the outer expansion narrow surface 112 are both trapezoidal inclined surfaces, which facilitates smooth expansion of the shell at a point, gradually increases the expansion size, and ensures the flatness and linearity of the large and small surfaces of the shell.
[0048] In a preferred embodiment, the spacing between the outer expansion layers 11 is 1mm-5mm, and the spacing between the inner pressure layers 31 is 1mm-5mm.
[0049] Specifically, an outer expansion step gap 116 for fixing and connecting appears every 1-5 mm, the next level of outer expansion layer 11 is matched with the opening of the outer expansion step gap 116, if the gap between the battery shell 2 and the shell expansion part 1 is too large, it can be transferred to the next level of outer expansion layer 11 for continuous shaping, if the shaping opening of the outer expansion layer 11 is at the optimal point at this time, the shell is fixed through the outer expansion step gap 116, avoiding the difference in the position of the shaping fixed point of the shell each time, causing the size of the opening to be different.
[0050] In a preferred embodiment, a second R angle 115 is provided between the outer expansion wide surface 111 and the outer expansion narrow surface 112, and the diameter of the second R angle 115 is 0.1-0.3 mm smaller than that of the first R angle 23.
[0051] Specifically, each level of outer expansion layer 11 has a welding mark reserved space, i.e., the first groove 113 and the second groove 114, which can provide space for the welding mark of the shell high-frequency welding, avoiding the deformation of the welding mark affecting the straightness of the narrow surface.
[0052] The second R angle 115 is also designed in coordination with the size of the first R angle 23 inside the shell, and the diameter of the second R angle 115 is 0.1-0.3 mm smaller than that of the first R angle 23, reserving a stress rebound space to prevent the first R angle 23 from being damaged.
[0053] In a preferred embodiment, referring to Figure 4 , the inner pressure layer 31 includes an upper and lower symmetrical inner pressure wide surface 311 and a left and right symmetrical inner pressure narrow surface 312, both of which are trapezoidal inclined surfaces, forming a trapezoidal structure for inner pressure.
[0054] Specifically, the shell inner pressure part 3 includes multiple levels of trapezoidal structures for inner pressure, which facilitates one-time, two-time or multiple-time inner sub-shaping of the battery shell 2, can inhibit the stress rebound of the shell after being stressed and bound, and the battery shell 2 can be closely matched with the shell inner pressure part 3, so that the opening size of the shell is controllable.
[0055] It is convenient for the shell to contract smoothly little by little, so that the second end expansion gradually decreases, ensuring the planarity and straightness of the large and small surfaces of the shell.
[0056] An inner pressure step gap 314 appears every 1-5 mm, which is used to connect the next level of inner pressure layer 31, and the next level of inner pressure layer 31 is matched with the opening of the inner pressure step gap 314, if the gap between the shell and the shell inner pressure part 3 is too large, it can be transferred to the next level of inner pressure layer 31 for continuous shaping, if the shaping opening of the shell inner pressure part 3 is at the optimal point at this time, the shell is fixed through the inner pressure step gap 314, avoiding the difference in the position of the shaping fixed point of the shell each time, causing the size of the opening to be different.
[0057] In a preferred embodiment, the inner side of the inner pressure layer 31 is provided with a third groove matching the protrusion 22, and the third groove is at the same horizontal level as the protrusion 22.
[0058] The thickness of the inner pressure wide surface 311 is greater than the thickness of the inner pressure narrow surface 312, which prevents the shell from being damaged or deformed due to excessive expansion force, and increases the thickness of the wide surface to make the inner pressure part 3 of the shell more stable.
[0059] The third R angle 313 is provided between the inner pressure wide surface 311 and the inner pressure narrow surface 312, and the diameter of the third R angle 313 is 0.1mm-0.3mm smaller than the diameter of the first R angle 23.
[0060] Specifically, each level of the inner pressure layer 31 has a welding mark reserved space, i.e. a third groove, which provides space for the welding mark of the shell high-frequency welding, and avoids the deformation of the welding mark affecting the straightness of the narrow surface.
[0061] The third R angle 313 is designed in cooperation with the first R angle 23, and the diameter of the third R angle 313 is 0.1mm-0.3mm smaller than the diameter of the first R angle 23, which reserves a stress rebound space to avoid damage to the first R angle 23.
[0062] The utility model discloses a cooperation of shell outer expansion part 1 and shell inner pressure part 3, and the shaping operation of the wide surface and the narrow surface of the shell is carried out. The shell outer expansion part 1 is inserted into the inside of the shell and is used for shaping the flatness of the inner layer and the first R angle 23. The shell inner pressure part 3 is externally bound, and the flatness of the surface of the shell and the first R angle 23 are shaped, and the mutual action can prevent stress rebound of the opening of the shell and prevent deformation of the opening.
[0063] The shell outer expansion part 1 mainly plays the role of supporting the concave shell from inside, and has a ladder-shaped structure with multiple levels of deep shaping. Each level is a ladder surface, which is used for gradually supporting the inside of the shell. When the space of each level is sufficient, it directly jumps to the next level. When the optimal position of the level is reached, there is a shaping fixed step, which ensures that the supporting effect of each shell is the same, ensures the consistency of the flatness and size of the wide surface of the shell, and meets the batch of shells and cover plates.
[0064] The narrow surface of each ladder surface in the shell outer expansion part 1 is provided with a welding mark reserved space, i.e. a first groove 113 and a second groove 114, to avoid deformation caused by the welding mark.
[0065] The shell inner pressure part 3 is also a multi-stage structure, and is used for shell flatness shaping stage by stage.
[0066] The above description is only the preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious change obtained by applying the content of the present application description and drawings should be included in the protection scope of the present application.
Claims
1. A battery case shaping tool characterized by, The battery shell comprises a shell outer expansion part controllably inserted into the first end of the battery shell, the shell outer expansion part comprising a plurality of outer expansion layers connected in sequence along a first direction, the first outer expansion layer being arranged outside the first end, and the tail outer expansion layer being embedded inside the first end; The battery shell comprises a shell inner pressure part controllably sleeved on the second end of the battery shell, the shell inner pressure part comprising a plurality of inner pressure layers connected in sequence along the first direction, and the second end being controllably arranged in the inner pressure layer. The battery shell comprises four rectangular sides, one of which has a protrusion on the inner side and the outer side along the length direction of the battery shell, and a first R angle is arranged between the rectangular sides, and the diameter of the first R angle is 1mm-5mm.
2. The battery case shaping tool according to claim 1, wherein The outer expansion layer comprises an upper and lower symmetric outer expansion wide surface and a left and right symmetric outer expansion narrow surface, and the outer expansion wide surface and the outer expansion narrow surface are both trapezoidal inclined surfaces.
3. The battery case shaping tool according to claim 2, wherein The side surface of the outer expansion layer embedded inside the first end is provided with a first groove matched with the protrusion, and the first groove is at the same horizontal height as the protrusion; 4. The battery case shaping tool according to claim 2, wherein The inner side surface of the first outer expansion layer is provided with a second groove matched with the protrusion, and the second groove is at the same horizontal height as the protrusion. The outer expansion layer is provided with an outer expansion opening close to the first end, and the outer expansion openings of the plurality of outer expansion layers are sequentially reduced along the first direction; 5. The battery case shaping tool according to claim 1, wherein The inner pressure layer is provided with an inner pressure opening close to the second end, and the inner pressure openings of the plurality of inner pressure layers are sequentially reduced along the first direction. The second R angle between the outer expansion wide surface and the outer expansion narrow surface has a diameter smaller than the diameter of the first R angle by 0.1mm-0.3mm.
6. The battery case shaping tool according to claim 3, wherein The inner pressure layer comprises an upper and lower symmetric inner pressure wide surface and a left and right symmetric inner pressure narrow surface, and the inner pressure wide surface and the inner pressure narrow surface are both trapezoidal inclined surfaces.
7. The battery case shaping tool according to claim 2, wherein The inner side surface of the inner pressure layer is provided with a third groove matched with the protrusion, and the third groove is at the same horizontal height as the protrusion.
8. The battery case shaping tool according to claim 2, wherein The thickness of the inner pressure wide surface is greater than the thickness of the inner pressure narrow surface; 9. The battery case shaping tool according to claim 7, wherein The third R angle between the inner pressure wide surface and the inner pressure narrow surface has a diameter smaller than the diameter of the first R angle by 0.1mm-0.3mm. The spacing between the outer expansion layers is 1mm-5mm, and the spacing between the inner pressure layers is 1mm-5mm.
10. The battery case shaping tool according to claim 1, wherein