Protective cover and battery monomer processing equipment

Abstract

The embodiment of the utility model provides a protective cover and battery monomer processing equipment. The protective cover comprises a body and at least one flange, the body forms a protective groove, the protective groove is used for allowing a pole and a pole insulator of the single battery to enter, the at least one flange protrudes out of the circumferential inner surface of the protective groove and extends in the depth direction of the protective groove, and the flange is used for abutting against the pole. According to the protective cover and the battery monomer processing equipment provided by the embodiment of the invention, the at least one flange used for abutting against the pole is arranged on the circumferential inner surface of the protective groove, and in the feeding process of the protective cover, the contact mode of the flange and the pole is close to point contact, so that the damage to the appearance of the pole is small when scratching occurs, and the reliability of the battery monomer processing equipment is improved. And the probability of short circuit of the battery monomers is low, so that the requirement on the feeding positioning precision in the direction of the flange can be reduced.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of battery technology, and in particular to a protective cover and battery cell processing equipment. Background Art

[0002] During the processing of battery cells, the end caps of the battery cells and the outer shell of the battery cells are usually connected by welding. During the welding process, a protective cover is required to cover the pole on the end cap to protect the pole and the pole insulation parts around it. The protective cover in the related technology has high requirements for feeding accuracy. If the feeding accuracy is insufficient, it is easy to cause problems such as pole appearance defects and battery cell short circuit. Utility Model Content

[0003] In view of this, embodiments of the present application hope to provide a protective cover and a battery cell processing device that can at least partially solve the above-mentioned problems.

[0004] The first aspect of an embodiment of the present application provides a protective cover, which includes: a main body, formed with a protective groove, wherein the protective groove is used for the pole and pole insulator of the battery cell to enter; and at least one flange, protruding from the circumferential inner surface of the protective groove and extending along the depth direction of the protective groove, wherein the flange is used to abut against the pole.

[0005] In the protective cover of this embodiment, at least one flange for abutting against the pole is arranged on the circumferential inner surface of the protective groove. During the feeding process of the protective cover, the contact between the flange and the pole is close to point contact. When scratches occur, the damage to the appearance of the pole is small, resulting in a low probability of short circuit in the battery cell. Therefore, the requirements for feeding positioning accuracy in the direction of the flange can be reduced.

[0006] On the other hand, in the actual welding process, the presence of the flange can reduce the contact area between the pole and the protective cover, thereby reducing the heat transfer between the protective cover and the pole, reducing the possibility of additional damage to the pole and the pole insulation, and having a better protection effect on the pole and the pole insulation.

[0007] On the other hand, the flange can also effectively reduce the displacement of the protective cover during the welding process and improve the welding accuracy and stability.

[0008] In some embodiments, there are multiple flanges, and the multiple flanges are distributed along the circumference of the protection groove.

[0009] In this embodiment, a plurality of peripheral edges distributed along the circumference of the protective groove are provided, thereby helping to reduce the positioning accuracy requirements in multiple directions during the feeding process of the protective cover and further reducing the heat exchange area between the protective cover and the pole during the welding process.

[0010] In some embodiments, the maximum width of the flange does not exceed the dimension of the pole insulator along the depth direction of the protection groove; and / or the maximum width of the flange does not exceed 0.5 mm.

[0011] In this embodiment, it helps to further reduce the probability of causing a short circuit in the battery cell when the flange and the pole are scratched.

[0012] In some embodiments, the width of the flange decreases in a direction away from the inner surface of the protection groove.

[0013] In this embodiment, the contact area between the flange and the pole can be further reduced, thereby further reducing damage to the appearance of the pole and the probability of causing a short circuit in the battery cell when a scratch occurs, and further reducing the contact area between the protective cover and the pole during the welding process.

[0014] In some embodiments, the maximum thickness of the flange protruding from the inner surface of the protective groove does not exceed 0.5 mm.

[0015] In this embodiment, the maximum thickness T of the flange is controlled within a range of no more than 0.5 mm. In this way, the size of the protective cover can be reduced as much as possible, so that the outer surface of the protective cover can be as far away from the welding medium emission source (such as a laser source) as possible during the welding process, thereby reducing the probability of damage to the protective cover during the welding process.

[0016] In some embodiments, along the depth direction of the protective groove, the protective groove includes a accommodating section and a guide section, the flange is arranged on the accommodating section, the notch of the protective groove is formed on the guide section, and the inner surface of the guide section is formed as a first guide surface, and from the direction close to the accommodating section to the direction away from the accommodating section, the first guide surface extends obliquely in the direction away from the central axis of the protective groove.

[0017] In this embodiment, the first guide surface can provide a guiding function during the loading process, which can further reduce the positioning accuracy requirement during loading.

[0018] In some embodiments, the depth of the guide section is not less than the free lowering height of the protective cover.

[0019] In this embodiment, the depth H1 of the guide section is not less than the free falling height of the protective cover, so that the first guide surface can play a guiding role during the entire process of the protective cover falling in a free fall manner, thereby improving the guiding effect of the first guide surface.

[0020] In some embodiments, along the depth direction of the protective groove, one end of the flange is flush with an end of the guide section close to the accommodating section, the depth of the guide section is less than the height of the pole, and the sum of the depth of the guide section and the extended height of the flange is greater than the height of the pole.

[0021] In this embodiment, it can be ensured that the pole is in contact with the flange during the loading process, thereby ensuring that the flange can exert its positioning effect.

[0022] In some embodiments, a side surface of the flange facing the notch of the protection groove is formed as a second guide surface, and the second guide surface is connected to the first guide surface and is arranged coplanarly.

[0023] In this embodiment, the cooperation between the first guide surface and the second guide surface can further improve the smoothness of the falling of the protective cover.

[0024] In some embodiments, the body forms two protection grooves spaced apart along a first direction, each protection groove is away from the inner surface of the other protection groove along the first direction, and a flange is provided on each of the inner surfaces on opposite sides along a second direction, the first direction and the second direction intersect, and the first direction and the second direction are both perpendicular to the depth direction of the protection groove.

[0025] Compared with providing flanges on the inner surfaces of the two opposite sides of each positioning groove along the first direction, in this embodiment, while reducing the positioning accuracy requirement of the protective cover along the first direction, the size of the protective cover along the first direction can be reduced, thereby reducing the probability of damage to the protective cover during welding.

[0026] A second aspect of an embodiment of the present application provides a battery cell processing device, which includes a welding mechanism and a protective mechanism for protecting a pole and a pole insulating column during welding, wherein the protective mechanism includes the protective cover described in the first aspect of the embodiment of the present application.

[0027] The battery cell processing equipment of the embodiment of the present application has all the advantages of the protective cover described in any of the above embodiments, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of one side of the protective cover of an embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of the structure of the other side of the protective cover of an embodiment of the present application;

[0030] Figure 3 for Figure 1 AA section schematic diagram of the middle protective cover;

[0031] Figure 4 for Figure 1 A magnified schematic diagram of part B;

[0032] Figure 5 for Figure 1 A magnified schematic diagram of part C;

[0033] Figure 6 for Figure 3 Enlarged schematic diagram of part D in the figure.

[0034] Description of Reference Numerals

[0035] 1. Main body; 11. Protection groove; 11a. Notch; 111. Accommodating section; 112. Guide section; 113. First guide surface; 12. Avoidance groove; 13. Positioning groove; 14. Groove; 15. Positioning hole; 2. Flange; 21. Second guide surface. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0037] The various specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in the utility model will not be described separately.

[0038] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or related points. It should be understood that the directions "above", "below", "outside" and "inside" are all directions in normal use, and the directions "left" and "right" refer to the left and right directions shown in the specific corresponding schematic diagrams, which may be the left and right directions in normal use or not.

[0039] It should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a 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 further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0040] In the description of the present application, the orientations or positional relationships of “first direction”, “second direction” and “depth direction” are based on the orientations or positional relationships shown in the accompanying drawings, wherein the “first direction” is the direction indicated by the arrow L1 in the accompanying drawings, the “second direction” is the direction indicated by the arrow L2 in the accompanying drawings, and the “depth direction” is the direction indicated by the arrow L3 in the accompanying drawings. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0042] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0044] An embodiment of the present application provides a protective cover and a battery cell processing device, wherein the protective cover is used to cover the end cover of the battery cell to protect the pole and the pole insulating member on the end cover during the welding process.

[0045] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0046] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0047] The battery cell includes a shell. The shell can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), etc. The shell includes an end cover and a shell body, the shell body is provided with an opening, and the end cover is provided on the opening. The shell body can be provided with one or more openings. One or more end covers can also be provided.

[0048] The end cover is provided with a pole and a pole insulator. The pole is electrically connected to the electrode assembly in the shell. The pole insulator is used to insulate the pole from the end cover to avoid short circuit.

[0049] In some embodiments, the pole insulating member is also referred to as upper plastic, and the pole insulating member may be an insulating member arranged around the pole, such as a plastic member, a silicone member, etc.

[0050] During the processing of battery cells, the end caps and shells need to be welded. The high temperature and strong light generated during the welding process may damage the poles and pole insulators, affecting the performance and safety of the battery cells. Therefore, the poles and pole insulators need to be protected during the welding process.

[0051] The related technology provides a protective cover with a protective groove formed on the protective cover. During welding, the pole and the pole insulation are located in the protective groove. In order to improve the feeding accuracy of the protective cover, the inner surface of the protective groove is usually set to fit the pole as closely as possible.

[0052] The present application proposes that one of the defects of this type of protective cover is that it requires high positioning accuracy during loading. Specifically, if the protective cover is not positioned accurately during loading, the protective cover may scratch the pole, and the protective cover and the pole are in line contact during the friction process, which may cause serious defects in the appearance of the pole, and may even scratch out a metal wire with a length exceeding the creepage distance, thereby causing a short circuit in the battery cell. Another defect is that the large area contact between the protective cover and the pole will increase the heat transfer during the welding process, which may cause additional damage to the pole and the pole insulation.

[0053] In response to the above problems, a protective cover of an embodiment of the present application is proposed. The protective cover of the embodiment of the present application includes a main body and at least one flange. The main body forms a protective groove for the pole and pole insulation of the battery cell to enter. At least one flange protrudes from the circumferential inner surface of the protective groove and extends along the depth direction of the protective groove. The flange is used to abut against the pole.

[0054] In the protective cover of this embodiment, at least one flange for abutting against the pole is provided on the circumferential inner surface of the protective groove. During the feeding process of the protective cover, the contact mode between the flange and the pole is close to point contact, and the damage to the appearance of the pole in the event of a scratch is small, resulting in a low probability of a short circuit in the battery cell. Therefore, the requirements for the feeding positioning accuracy in the direction of the flange can be reduced. On the other hand, during the actual welding process, the contact area between the flange and the pole is small, thereby reducing the heat transfer between the protective cover and the pole, and reducing the possibility of additional damage to the pole and the pole insulation. On the other hand, the flange can also effectively reduce the displacement of the protective cover during the welding process, thereby improving the accuracy and stability of welding.

[0055] Reference Figure 1-Figure 4 The protective cover of the embodiment of the present application includes a main body 1 and at least one flange 2. The main body 1 forms a protective groove 11, and the protective groove 11 is used for the pole and the pole insulation of the battery cell to enter. At least one flange 2 protrudes from the circumferential inner surface of the protective groove 11 and extends along the depth direction of the protective groove 11. The flange 2 is used to abut against the pole.

[0056] The specific shape of the main body 1 is not limited. As an example, the main body 1 can be a plate-like structure. The shape of the main body 1 can be similar to that of the end cover, but the size is smaller than the size of the end cover. In actual use, one side surface of the main body 1 along the thickness direction is in contact with the side surface of the end cover facing away from the shell, and the outer periphery of the main body 1 is located on the inner side of the outer periphery of the end cover, thereby exposing the outer periphery of the shell for welding operations.

[0057] The shape of the protection groove 11 matches the shape of the pole. As an example, the pole can be in the shape of a cylinder, a hexagonal prism or a rectangular body, and accordingly, the groove can be a circular groove, a hexagonal groove or a rectangular groove. This application is mainly described by taking the pole as a rectangular body and the groove as a rectangular groove as an example.

[0058] Taking the main body 1 as a plate-like structure as an example, the depth direction of the protection groove 11 can be parallel to the thickness direction of the main body 1, and the protection groove 11 can form a notch 11a on one side surface of the main body 1 along the thickness direction, and the pole and the pole insulator can enter the protection groove 11 through the notch 11a.

[0059] It should be noted that the depth of the accommodating groove should not be less than the height of the pole protruding from the end cover, so that the pole can fully enter the accommodating groove, and after the pole fully enters the accommodating groove, the side surface of the main body 1 facing the end cover can fit with the end cover, thereby reducing the probability of the welding medium entering the protective groove 11 through the gap between the main body 1 and the end cover during welding, causing damage to the pole and the pole insulation.

[0060] The flange 2 protrudes from the circumferential inner surface of the protection groove 11 and extends in the depth direction of the protection groove 11. It can be understood that during the feeding process, the protection cover will slide along the pole. In the case where the flange 2 is not provided, if the feeding accuracy is insufficient, one side surface of the protection groove 11 may interfere with the pole. At this time, the side surface will form a line contact with the pole as a whole and scratch the pole. The scratch may cause serious appearance defects on the pole, and the scratch may generate metal wires, and the length of the metal wires may exceed the creepage distance between the pole and the end cover, causing a short circuit of the battery cell.

[0061] In the case where the flange 2 is added, when interference occurs, only the flange 2 on the side where the flange 2 is located will come into contact with the pole, and since the flange 2 itself extends along the depth direction of the protection groove 11 rather than along the circumference of the protection groove 11, the contact between the flange 2 and the pole will be close to point contact. Even if scratches occur, the damage to the appearance of the pole is relatively small, and it is difficult for the scratches to form long metal wires to cause a short circuit in the battery cell.

[0062] The specific extension range of the flange 2 along the depth direction of the protection groove 11 is not limited, for example, it can extend from a position close to the groove opening 11 a of the protection groove 11 to a position close to the groove bottom of the protection groove 11 .

[0063] The flange 2 may be formed as an integral structure with the body 1 , or may be connected to the inner surface of the protective groove 11 by bonding, welding, or the like, and there is no limitation to this.

[0064] The number of flanges 2 can be one or more, and there is no limitation on this. It is understandable that even if only one flange 2 is provided, the above-mentioned effect can be achieved at least on the side where the flange 2 is located.

[0065] In the protective cover of this embodiment, at least one flange 2 for abutting against the pole is arranged on the circumferential inner surface of the protective groove 11. During the feeding process of the protective cover, the contact mode between the flange 2 and the pole is close to point contact. When scratches occur, the damage to the appearance of the pole is small, resulting in a low probability of short circuit in the battery cell. Therefore, the requirements for the feeding positioning accuracy in the direction of the flange 2 can be reduced.

[0066] On the other hand, during the actual welding process, the presence of the flange 2 can reduce the contact area between the pole and the protective cover, thereby reducing the heat transfer between the protective cover and the pole, reducing the possibility of additional damage to the pole and the pole insulation, and having a better protection effect on the pole and the pole insulation.

[0067] On the other hand, the flange 2 can also effectively reduce the displacement of the protective cover during the welding process, thereby improving the welding accuracy and stability.

[0068] In some embodiments, reference Figure 1 and Figure 4 There are multiple flanges 2 , and the multiple flanges 2 are distributed along the circumference of the protection groove 11 .

[0069] by Figure 4 Taking the rectangular groove as an example, the protective groove 11 has four inner surfaces in the circumferential direction, and multiple flanges 2 can be respectively arranged on different inner surfaces, such as one flange 2 can be arranged on each of the four inner surfaces, or one flange 2 can be arranged on three of the inner surfaces.

[0070] Those skilled in the art can reasonably set the specific position of each flange 2 according to the potential deviation direction of the protective cover during the actual material feeding process, and there is no limitation to this.

[0071] In this embodiment, a plurality of peripheral edges distributed along the circumference of the protective groove 11 are provided, thereby helping to reduce the positioning accuracy requirements in multiple directions during the protective cover feeding process and further reducing the heat exchange area between the protective cover and the pole during the welding process.

[0072] In some embodiments, reference Figure 5 , the maximum width W of the flange 2 does not exceed the dimension of the pole insulator along the depth direction of the protection groove 11; and / or the maximum width of the flange 2 does not exceed 0.5 mm.

[0073] The maximum width W of the flange 2 here should be understood as the maximum dimension of the flange 2 along the circumference of the protection groove 11. Not exceeding should be understood as less than or equal to.

[0074] It can be understood that during the feeding process, the length of the contact portion between the flange 2 and the pole will not exceed the maximum width of the flange 2. Therefore, even if metal wires are generated due to scratches, the maximum length of the metal wires will basically not exceed the maximum width W of the flange 2. In this embodiment, the maximum width W of the flange 2 does not exceed the dimension of the pole insulator along the depth direction of the protection groove 11, and / or the maximum width of the flange 2 does not exceed 0.5 mm. In this way, the metal wires generated by scratches will be smaller than the above-mentioned size range, and it is difficult for the metal wires of this length to cross the pole insulator and connect the pole to the end cover.

[0075] In this embodiment, the maximum width of the flange 2 may satisfy only one of the above two numerical ranges, or may satisfy both of the above two numerical ranges (i.e., the maximum width of the flange 2 is smaller than the dimension of the pole insulating column along the depth direction and 0.5 mm).

[0076] In this embodiment, the lower limit of the maximum width of the flange 2 can be specifically determined by those skilled in the art based on actual manufacturing costs, process levels, etc. As an example, the maximum width of the flange 2 is not less than 0.1 mm.

[0077] In a specific embodiment, the maximum width of the flange 2 may be 0.1-0.5 mm, such as 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc.

[0078] It should be noted that, when there are multiple flanges 2 , the maximum widths of the multiple flanges 2 may be the same or different.

[0079] In this embodiment, it helps to further reduce the probability of causing a short circuit in the battery cell when the flange 2 and the pole are scratched.

[0080] In some embodiments, the width of the flange 2 decreases in a direction away from the inner surface of the protection groove 11 .

[0081] In this embodiment, the reduction in the width of the flange 2 in the direction away from the protection groove 11 may be continuous or discontinuous, and there is no limitation on this. As an example, the cross-section of the flange 2 (a cross-section perpendicular to the depth direction of the protection groove 11) may be in the shape of a triangle, a trapezoid, a semicircle, a semi-ellipse, an arc, an irregular shape, etc.

[0082] In this embodiment, the contact area between the flange 2 and the pole can be further reduced, thereby further reducing damage to the appearance of the pole and the probability of causing a short circuit in the battery cell when scratches occur, and further reducing the contact area between the protective cover and the pole during welding.

[0083] In some embodiments, the maximum thickness T of the flange 2 protruding from the inner surface of the protection groove 11 does not exceed 0.5 mm.

[0084] In this embodiment, the maximum thickness T of the flange 2 protruding from the inner surface of the protection groove 11 should be understood as the maximum dimension of the flange 2 in a direction perpendicular to the inner surface of the protection groove 11. Not exceeding should be understood as less than or equal to.

[0085] The lower limit of the maximum thickness of the flange 2 should be determined based on the minimum distance required to prevent the inner surface of the protection groove 11 from making linear contact with the pole. As an example, the maximum thickness T of the flange 2 is not less than 0.1 mm.

[0086] In a specific embodiment, the maximum thickness T of the flange 2 is in the range of 0.1-0.5 mm, such as 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc.

[0087] It should be noted that, when there are multiple flanges 2 , the maximum thicknesses of the multiple flanges 2 may be the same or different.

[0088] In this embodiment, the maximum thickness T of the flange 2 is controlled within a range of no more than 0.5 mm. In this way, the size of the protective cover can be reduced as much as possible, so that the outer surface of the protective cover can be as far away from the welding medium emission source (such as a laser source) as possible during the welding process, thereby reducing the probability of damage to the protective cover during the welding process.

[0089] In some embodiments, reference Figure 3 Along the depth direction of the protective groove 11, the protective groove 11 includes a receiving section 111 and a guide section 112, the flange 2 is arranged on the receiving section 111, the notch 11a of the protective groove 11 is formed on the guide section 112, and the inner surface of the guide section 112 is formed as a first guide surface 113. From the direction close to the receiving section 111 to the direction away from the receiving section 111, the first guide surface 113 extends obliquely in the direction away from the central axis of the protective groove 11.

[0090] It can be understood that the central axis of the protection groove 11 is parallel to the depth direction of the protection groove 11 .

[0091] Taking the receiving groove as a rectangular groove as an example, the four inner surfaces of the guide section 112 can all extend obliquely in a direction away from the central axis of the protection groove 11, and the inclination angles of the four surfaces can be the same. Taking the receiving groove as a circular groove as an example, the inner surface of the guide section 112 can be a conical surface.

[0092] Since the notch 11a of the protection groove 11 is formed in the guide section 112, it means that the first guide surface 113 will be the first part of the protection groove 11 to contact the pole, and since the first guide surface 113 is inclined in the direction away from the central axis of the protection groove 11 (that is, inclined in the direction away from the pole), in the case of inaccurate positioning, the guide section 112 can provide a guiding effect to guide the pole to slide into the accommodating section 111 and abut against the flange 2.

[0093] In this embodiment, the first guide surface 113 can provide a guiding function during the loading process, which can further reduce the positioning accuracy requirement during loading.

[0094] In some embodiments, reference Figure 6 , the depth H1 of the guide section 112 is not less than the free lowering height of the protective cover.

[0095] In the actual material feeding process, a robotic arm is usually used to move the protective cover to a fixed position above the end cover, and then the protective cover is released to allow the protective cover to fall in a free fall manner. At this position, the distance between the end of the guide section 112 close to the end cover and the end cover is the free fall height.

[0096] In this embodiment, the depth H1 of the guide section 112 is not less than the free falling height of the protective cover, so that the first guide surface 113 can play a guiding role during the entire process of the protective cover falling in a free fall manner, thereby improving the guiding effect of the first guide surface 113.

[0097] In some embodiments, still referring to Figure 6 Along the depth direction of the protection groove 11, one end of the flange 2 is flush with the end of the guide section 112 close to the accommodating section 111, the depth H1 of the guide section 112 is less than the height of the pole, and the sum of the depth H1 of the guide section 112 and the extended height H2 of the flange 2 is greater than the height of the pole.

[0098] The height of the pole here should be understood as the height of the pole protruding from the end cover.

[0099] In this embodiment, it can be ensured that the pole contacts the flange 2 during the loading process, thereby ensuring that the flange 2 can exert its positioning effect.

[0100] In some embodiments, still referring to Figure 6 A side surface of the flange 2 facing the notch 11 a of the protection groove 11 is formed as a second guide surface 21 , and the second guide surface 21 is connected to the first guide surface 113 and is arranged on the same plane.

[0101] The second guide surface 21 is connected to the first guide surface 113 and is arranged on the same plane. It should be understood that the second guide surface 21 and the first guide surface 113 are connected and are located on the same inclined plane.

[0102] In this embodiment, the cooperation between the first guide surface 113 and the second guide surface 21 can further improve the smoothness of the falling of the protective cover.

[0103] In some embodiments, reference Figure 1 and Figure 4 The main body 1 forms two protective grooves 11 spaced apart along a first direction, and each protective groove 11 has an inner surface away from the other protective groove 11 along the first direction, and a flange 2 is provided on each of the inner surfaces on the opposite sides along the second direction. The first direction and the second direction intersect, and the first direction and the second direction are both perpendicular to the depth direction of the protective groove 11.

[0104] As an example, the first direction is perpendicular to the second direction. Taking the body 1 as a plate-shaped structure as an example, the first direction is the length direction of the body 1, and the second direction is the width direction of the body 1.

[0105] In this embodiment, the two protection grooves 11 are respectively used for two poles on the end cover (such as the positive pole and the negative pole on the end cover of the square shell battery) to enter, so that only one protection cover needs to be loaded to simultaneously protect the two poles.

[0106] It can be understood that the distribution of the two protective grooves 11 along the first direction means that the positioning accuracy of the two protective grooves 11 in the first direction are interrelated. Therefore, in this embodiment, a flange 2 is provided on the inner surface of each positioning groove away from the other protective groove 11 along the first direction, so that the inner surface of the positioning groove close to the other positioning groove along the first direction will not be scratched.

[0107] Compared with providing flanges 2 on the inner surfaces of the two opposite sides of each positioning groove along the first direction, in this embodiment, while reducing the positioning accuracy requirement of the protective cover along the first direction, the size of the protective cover along the first direction can be reduced, thereby reducing the probability of damage to the protective cover during welding.

[0108] In some embodiments, reference Figure 1 and Figure 3 The body 1 may also be formed with an avoidance groove 12 for the pressure relief mechanism (such as an explosion-proof valve) on the end cover to enter. In this way, when the pressure relief mechanism is provided on the end cover, the body 1 can still be closely attached to the end cover.

[0109] In some embodiments, reference Figure 2 and Figure 3 A clamping groove 13 for inserting the power output end of the driving component is formed on one side of the body 1 away from the notch 11a of the protection groove 11. When the driving component drives the body 1 to move toward the end cover, the power output end of the driving component can extend into the clamping groove 13 to fix the body 1. The driving component can be a linear motor or a cylinder, etc., which facilitates the alignment and connection of the output end of the driving component and the protection cover to facilitate automated operation.

[0110] In some embodiments, reference Figure 2 and Figure 3 Two grooves 14 are formed on the main body 1, and the grooves 14 are used for the hook claws of the driving component to enter. The grooves 14 penetrate the main body 1 along the second direction. The two grooves 14 are distributed along the first direction. In actual use, after the power output end extends into the locking groove 13, the hook claws of the driving component can extend into the grooves 14, thereby fixing the power output end in the locking groove 13.

[0111] In some embodiments, the groove 14 may be disposed in the locking groove 13 , or a portion of the groove 14 may be disposed in the locking groove 13 .

[0112] In some embodiments, at least one positioning hole 15 is formed on one side of the body 1 away from the notch 11a of the protection groove 11, and the positioning hole 15 is used for the positioning pin of the drive assembly to cooperate and insert, so as to realize the positioning of the drive assembly. As an example, the number of positioning holes 15 can be two, which are respectively arranged on the opposite sides of the positioning groove 13 along the first direction. Alternatively, the number of positioning holes 15 can be four, and two positioning holes 15 are respectively arranged on the opposite sides of the positioning groove 13 along the first direction, and the two positioning holes 15 on the same side are distributed along the second direction.

[0113] In some embodiments, a guiding slope may be provided at the entrance of the positioning hole 15 .

[0114] The protective cover involved in one or more of the above embodiments will be described in more detail and detail below in conjunction with a specific embodiment.

[0115] Reference Figure 1-Figure 6 The protective cover of the embodiment of the present application includes a body 1 and a flange 2. The body 1 is a plate-like structure, and the body 1 forms two protective grooves 11, and the protective grooves 11 are used for the poles and pole insulators on the end cover to enter. The two protective grooves 11 are distributed along a first direction, and the first direction is the length direction of the body 1.

[0116] The flange 2 protrudes from the circumferential inner surface of the protection groove 11 and extends along the depth direction of the protection groove 11. At least one flange 2 is arranged in each protection groove 11, and the flange 2 is used to abut against the pole.

[0117] Specifically, three flanges 2 are arranged in each protective groove 11, one flange 2 is arranged on the inner surfaces of the two opposite sides of the protective groove 11 along the second direction, and one inner surface away from the other protective groove 11 along the first direction, and the flange 2 is arranged in the middle position of the corresponding inner surface.

[0118] The maximum width W of the flange 2 does not exceed the dimension of the pole insulator along the depth direction of the protection groove 11, more specifically, the maximum width W of the flange 2 does not exceed 0.5 mm. The maximum thickness T of the flange 2 protruding from the inner surface of the protection groove 11 does not exceed 0.5 mm.

[0119] Along the depth direction of the protection groove 11, the protection groove 11 includes a receiving section 111 and a guide section 112. The flange 2 is arranged in the receiving section 111, and along the depth direction of the protection groove 11, one end of the flange 2 is flush with one end of the guide section 112 close to the receiving section 111.

[0120] The notch 11a of the protection groove 11 is formed in the guide section 112, and the inner surface of the guide section 112 is formed as a first guide surface 113. From the direction close to the accommodation section 111 to the direction away from the accommodation section 111, the first guide surface 113 extends obliquely in the direction away from the central axis of the protection groove 11. The side surface of the flange 2 facing the notch 11a of the protection groove 11 is formed as a second guide surface 21, and the second guide surface 21 and the first guide surface 113 are connected and arranged in the same plane.

[0121] Along the depth direction of the protection groove 11, one end of the flange 2 is flush with the end of the guide section 112 close to the accommodating section 111, and the depth H1 of the guide section 112 is less than the height of the pole and not less than the free lowering height of the protection cover. The sum of the depth H1 of the guide section 112 and the extended height H2 of the flange 2 is greater than the height of the pole.

[0122] An embodiment of the present application further provides a battery cell processing device, which includes a welding mechanism and a protection mechanism for protecting a pole and a pole insulating column during welding, wherein the protection mechanism includes a protective cover as described in any of the above embodiments.

[0123] In some embodiments, the protection mechanism further includes a driving assembly for driving the protection cover to move toward the end cover.

[0124] The battery cell processing equipment of the embodiment of the present application has all the advantages of the protective cover described in any of the above embodiments, which will not be repeated here.

[0125] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0126] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A protective cover, characterized in that: The protective cover comprises: A body, formed with a protection groove, the protection groove is used for the pole and the pole insulating member of the battery cell to enter; and At least one flange protrudes from the circumferential inner surface of the protection groove and extends along the depth direction of the protection groove, and the flange is used to abut against the pole.

2. The protective cover according to claim 1, characterized in that: There are multiple flanges, and the multiple flanges are distributed along the circumference of the protection groove.

3. The protective cover according to claim 1, characterized in that: The maximum width of the flange does not exceed the dimension of the pole insulator along the depth direction of the protection groove; and / or The maximum width of the flange does not exceed 0.5 mm.

4. The protective cover according to claim 1, characterized in that: The width of the flange decreases in a direction away from the inner surface of the protection groove.

5. The protective cover according to claim 1, characterized in that: The maximum thickness of the flange protruding from the inner surface of the protection groove does not exceed 0.5 mm.

6. The protective cover according to claim 1, characterized in that: Along the depth direction of the protective groove, the protective groove includes a accommodating section and a guide section, the flange is arranged on the accommodating section, the notch of the protective groove is formed on the guide section, and the inner surface of the guide section is formed as a first guide surface, and from the direction close to the accommodating section to the direction away from the accommodating section, the first guide surface extends obliquely in the direction away from the central axis of the protective groove.

7. The protective cover according to claim 6, characterized in that: The depth of the guide section is not less than the free lowering height of the protective cover.

8. The protective cover according to claim 6, characterized in that: Along the depth direction of the protection groove, one end of the flange is flush with one end of the guide section close to the accommodating section, the depth of the guide section is less than the height of the pole, and the sum of the depth of the guide section and the extended height of the flange is greater than the height of the pole.

9. The protective cover according to claim 6, characterized in that: A side surface of the flange facing the notch of the protection groove is formed as a second guide surface, and the second guide surface is connected to the first guide surface and is arranged on the same plane.

10. The protective cover according to any one of claims 1 to 9, characterized in that: The main body forms two protection grooves spaced apart along a first direction, each protection groove has an inner surface away from the other protection groove along the first direction, and a flange is provided on each of the inner surfaces on opposite sides along a second direction, the first direction intersects with the second direction, and the first direction and the second direction are both perpendicular to the depth direction of the protection groove.

11. A battery monomer processing device, characterized in that: The battery cell processing equipment comprises a welding mechanism and a protection mechanism for protecting a pole and a pole insulating column during welding, wherein the protection mechanism comprises the protection cover according to any one of claims 1 to 10.

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