Positioning jig and riveting device

Abstract

The utility model relates to the technical field of batteries, in particular to a riveting positioning jig and a riveting device. The positioning jig comprises a bearing table and a pressing plate. Wherein the bearing table is used for bearing a battery substrate and is provided with a substrate groove matched with the battery substrate in shape, and the bearing table is provided with a plurality of first positioning parts around the substrate groove; the pressing plate is arranged above the bearing table, the lower surface of the pressing plate is provided with a positioning insertion piece used for being inserted into an air hole of the plastic sheet and a plurality of second positioning parts corresponding to the first positioning parts, and the second positioning parts are arranged to be aligned with the first positioning parts so that the riveting pieces on the plastic sheet can be aligned with the riveting grooves in the battery substrate. According to the base plate groove, the first positioning part, the second positioning part and the positioning plug-in unit, the riveting piece on the plastic sheet and the riveting groove in the battery base plate can be rapidly and accurately aligned, and the riveting efficiency of an existing riveting device applied to assembling of the lithium battery cover plate assembly is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a positioning fixture and a riveting device. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems, and consumer electronics, the demand for lithium battery structural components is constantly increasing. As an important structural component of lithium batteries, the cover plate assembly typically includes a metal battery substrate, a plastic sheet, and electrode posts. The battery substrate and plastic sheet are usually riveted together using a riveting device. Existing riveting devices used for assembling the battery substrate and plastic sheet suffer from low alignment accuracy between the riveting device and the battery substrate, between the riveting device and the plastic sheet, and between the battery substrate and the plastic sheet. Furthermore, the high complexity of using these riveting devices leads to low riveting efficiency in the assembly of lithium battery cover plates. Utility Model Content

[0003] The purpose of this invention is to overcome the problem of low riveting efficiency in existing riveting devices used for assembling lithium battery cover plate components, and to provide a positioning fixture and riveting device that improve the assembly efficiency of riveting devices for fixing lithium battery cover plate components.

[0004] To achieve the above objectives, this utility model provides a positioning fixture, which includes:

[0005] A support platform for supporting a battery substrate, having a substrate groove adapted to the shape of the battery substrate, and the support platform having a plurality of first positioning portions surrounding the substrate groove; and

[0006] A pressure plate is disposed above the support platform, and its lower surface is provided with a positioning plug for inserting a vent hole for inserting a plastic sheet and a plurality of second positioning parts corresponding to the first positioning part. The second positioning parts are configured to align with the first positioning parts so that the riveting parts on the plastic sheet and the riveting grooves on the battery substrate are aligned.

[0007] Preferably, the support platform is further provided with a plurality of fasteners around the substrate groove, the plurality of fasteners being configured to fix at least one of the battery substrate and the plastic sheet.

[0008] Preferably, the fixing member is configured to be drivable and slide into the substrate groove until the engaging portion of the fixing member extends into the substrate groove, wherein the engaging portion is configured as follows:

[0009] The lower surface is used to abut against the upper surface of the edge portion of the battery substrate, thereby engaging and fixing the battery substrate into the substrate groove; and / or the inner side of the engaging portion facing the plastic sheet is used to abut against the outer periphery of the plastic sheet to fix the horizontal position of the plastic sheet.

[0010] Preferably, the plurality of fixing members are respectively provided in one-to-one correspondence with the plurality of first positioning parts; the first positioning part is one of the insert and the slot, and the second positioning part is the other of the insert and the slot;

[0011] The inserter is configured to be inserted into the slot, directly or indirectly driving the fixing member to slide towards the substrate groove.

[0012] Preferably, the first positioning part is a slot, the second positioning part is a insert, the slot is disposed on the side of the fixing member away from the substrate groove, and the side of the fixing member away from the substrate groove is disposed in the slot when not subjected to external force;

[0013] The first side of the fastener facing the slot and the upper surface of the fastener are connected by a first inclined surface, and the second side of the insert facing the plastic sheet and the lower surface of the insert are connected by a second inclined surface.

[0014] The insert is configured to press down so that the second inclined surface fits against the first inclined surface, and transmits a horizontal force to the fixing member through the fitting surface, causing the fixing member to slide towards the substrate groove until the first side surface abuts against the second side surface.

[0015] Preferably, the support platform is provided with six fixing members, wherein two of the fixing members are respectively provided at both ends of the battery substrate, and the remaining four fixing members are respectively provided at the two long rectangular sides of the battery substrate.

[0016] Preferably, the lower surface of the pressure plate is further provided with a plurality of pressing members, which are configured to be driven to press down against the plastic sheet, so that the battery substrate and the plastic sheet are riveted and fixed under the pressure of the support platform and the pressing members.

[0017] Preferably, two pressing members are provided on the lower surface of the pressure plate, and the two pressing members are respectively provided for the positive electrode riveting part and the negative electrode riveting part of the plastic sheet.

[0018] Preferably, the upper surface of the support platform is further provided with a foolproof component, which is provided corresponding to the substrate casting hole of the battery substrate and is configured to be inserted sequentially into the substrate casting hole and the plastic sheet casting hole of the plastic sheet to prevent the battery substrate and the plastic sheet from being connected in reverse.

[0019] A second aspect of this utility model provides a riveting device, the riveting device comprising:

[0020] The above-mentioned positioning fixture; and

[0021] A pressing assembly is configured to drive the pressure plate downwards so that the battery substrate and the plastic sheet are riveted and fixed under the pressure of the support platform and the pressure plate.

[0022] Through the above technical solution, the positioning fixture provided by this utility model has a substrate groove and multiple first positioning parts on the support platform, and multiple second positioning parts and positioning plugs on the lower surface of the pressure plate. The substrate groove defines the position between the battery substrate and the support platform; the multiple first and second positioning parts align the support platform and the pressure plate; and the positioning plugs align the pressure plate and the plastic sheet. The substrate groove, first positioning parts, second positioning parts, and positioning plugs together enable rapid and accurate alignment of the riveting parts on the plastic sheet and the riveting groove on the battery substrate, improving the riveting efficiency of existing riveting devices used in the assembly of lithium battery cover plates. Attached Figure Description

[0023] Figure 1 This is a cross-sectional structural diagram of the positioning fixture provided by this utility model in an assembled state;

[0024] Figure 2 This is a cross-sectional structural diagram of the positioning fixture provided by this utility model in a separated state;

[0025] Figure 3 This is a schematic diagram of the battery substrate facing the plastic sheet side in this utility model;

[0026] Figure 4 This is a top view of the support platform provided by this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the plastic sheet facing the battery substrate in this utility model;

[0028] Figure 6 This is a bottom view of the pressure plate provided by this utility model;

[0029] Figure 7 This is another cross-sectional structural diagram of the positioning fixture provided by this utility model in an assembled state;

[0030] Figure 8 yes Figure 7 A partial enlarged view of part I of the positioning fixture shown;

[0031] Figure 9 yes Figure 7A partial enlarged view of part II of the positioning fixture shown;

[0032] Figure 10 yes Figure 7 A partial enlarged view of part III of the positioning fixture shown;

[0033] Figure 11 This is a cross-sectional structural diagram of the riveting device provided by this utility model.

[0034] Explanation of reference numerals in the attached figures

[0035] 1-Riveting device; 10-Positioning fixture; 20-Pressure assembly; 30-Control host; 40-Monitor; 50-Frame; 60-Cover plate assembly;

[0036] 11-Supporting platform; 12-Pressure plate; 101-Slot; 102-Insertion tool; 111-First positioning part; 112-Fixing component; 113-Limiting protrusion; 114-Footing component; 121-Second positioning part; 122-Positioning insert; 123-Crimping component; 1121-Interlocking part; 1231-Fixing part; 1232-Crimping part;

[0037] 11a-Substrate groove; 11a0-Base groove; 11a1-Positive electrode groove; 11a2-Explosion-proof groove; 11a3-Negative electrode groove; 102a-Second side surface; 102b-Second inclined surface; 112a-First side surface; 112b-First inclined surface; 113a-Third side surface;

[0038] 61-Battery substrate; 62-Plastic sheet; 610-Substrate body; 611-Positive electrode part; 612-Explosion-proof part; 613-Negative electrode part; 620-Riveting part; 621-Positive electrode riveting part; 622-Ventilating part; 623-Negative electrode riveting part;

[0039] 610a - Riveting groove; 610b - Substrate casting hole; 620a - Plastic sheet casting hole; 621a - Positive electrode hole; 622a - Vent hole; 623a - Negative electrode hole. Detailed Implementation

[0040] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0041] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] Furthermore, the terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0043] Please see Figures 1 to 6 , Figure 1 This is a cross-sectional structural diagram of the positioning fixture provided by this utility model in an assembled state; Figure 2 This is a cross-sectional structural diagram of the positioning fixture provided by this utility model in a separated state; Figure 3 This is a schematic diagram of the battery substrate facing the plastic sheet side in this utility model; Figure 4 This is a top view of the support platform provided by this utility model; Figure 5 This is a schematic diagram of the structure of the plastic sheet facing the battery substrate in this utility model; Figure 6 This is a bottom view of the pressure plate provided by this utility model. This utility model provides a positioning fixture 10, which includes a support platform 11 and a pressure plate 12. The support platform 11 supports a battery substrate 61 and has a substrate groove 11a adapted to the shape of the battery substrate 61. The support platform 11 has multiple first positioning portions 111 arranged around the substrate groove 11a. The pressure plate 12 is positioned above the support platform 11, and its lower surface has positioning inserts 122 for inserting vent holes 622a into a plastic sheet 62 and multiple second positioning portions 121 corresponding to the first positioning portions 111. The second positioning portions 121 are configured to align with the first positioning portions 111 so that the riveting members 620 on the plastic sheet 62 and the riveting grooves 610a on the battery substrate 61 are aligned.

[0044] It is understood that the positioning fixture 10 provided by this utility model is used for assembling the cover plate assembly 60 of a lithium battery. The cover plate assembly 60 is an important structural component of the lithium battery, which is typically made of a metal battery substrate 61 (see...). Figure 3 ) and plastic sheet 62 (see Figure 5 The battery substrate 61 and the plastic sheet 62 are connected by riveting. When assembling the battery substrate 61 and the plastic sheet 62, the riveting groove 610a of the battery substrate 61 is usually placed upward on the support platform 11 of the riveting device 1, and the riveting piece 620 of the plastic sheet 62 is placed downward on the battery substrate 61, so that the riveting piece 620 of the plastic sheet 62 and the riveting groove 610a of the battery substrate 61 correspond to each other. Then, the pressing assembly 20 drives the pressure plate 12 located above the support platform 11 to press down, so that the battery substrate 61 and the plastic sheet 62 are brought closer to each other under the squeezing action of the support platform 11 and the pressure plate 12, until the riveting piece 620 enters the riveting groove 610a to complete the riveting of the battery cover assembly 60.

[0045] However, existing riveting devices 1 used for riveting and fixing battery substrate 61 and plastic sheet 62 suffer from low alignment accuracy between the riveting device 1 and battery substrate 61, between the riveting device 1 and plastic sheet 62, and between the battery substrate 61 and plastic sheet 62. This severely affects the efficiency of existing riveting devices 1 used for assembling lithium battery cover assembly 60. To address this problem, this invention provides a positioning fixture 10 for riveting device 1. This positioning fixture 10 has a simple structure and is easy to use, achieving precise alignment between the positioning fixture 10, battery substrate 61, and plastic sheet 62, greatly improving the assembly efficiency of cover assembly 60.

[0046] The support platform 11 provided by this utility model has a substrate groove 11a adapted to the shape of the battery substrate 61. In some optional embodiments, see [reference needed]. Figure 3 The battery substrate 61 includes a substrate body 610 and a positive electrode portion 611, an explosion-proof portion 612, and a negative electrode portion 613 sequentially disposed along the length of the substrate body 610. The positive electrode portion 611, the explosion-proof portion 612, and the negative electrode portion 613 all protrude from the side of the battery substrate 61 away from the plastic sheet 62. The positive electrode portion 611 and the negative electrode portion 613 are square in shape, with a positive electrode riveting groove 610a surrounding the positive electrode portion 611 and a negative electrode riveting groove 610a surrounding the negative electrode portion 613. An explosion-proof valve is provided on the side of the explosion-proof portion 612 away from the plastic sheet.

[0047] In some alternative implementations, see [link / reference] Figure 1 , Figure 2 and Figure 5The substrate groove 11a includes a base groove 11a0 and positive electrode sub-grooves 11a1, explosion-proof sub-grooves 11a2, and negative electrode sub-grooves 11a3, which are formed on the bottom surface of the base groove 11a0 and correspond to the shapes of the positive electrode portion 611, the explosion-proof portion 612, and the negative electrode portion 613. When the positioning fixture 10 is used for riveting assembly of the cover plate assembly 60, the positive electrode sub-grooves 11a1, the explosion-proof sub-grooves 11a2, and the negative electrode sub-grooves 11a3 are formed to correspond to the positive electrode portion 611, the explosion-proof portion 612, and the negative electrode portion 613, so that the battery substrate 61 can be stably placed on the support platform 11, ensuring that the position between the battery substrate 61 and the support platform 11 is relatively fixed.

[0048] The above are examples of specific structures of the substrate groove 11a and the battery substrate 61 used therein provided by this utility model, and should not be construed as limiting the structure of the substrate groove 11a and the battery substrate 61 used therein provided by this utility model. The substrate groove 11a of this utility model can be configured in various shapes, thereby being applied to the assembly of various types of battery cover assemblies 60. The specific shape of the substrate groove 11a should not be construed as limiting the support platform 11 provided by this utility model.

[0049] The pressure plate 12 is disposed above the support platform 11. It is understood that the pressure plate 12 is configured to align with the support platform 11 so that the riveting member 620 on the plastic sheet 62 and the riveting groove 610a on the battery substrate 61 are aligned. In some optional embodiments, see [reference needed]. Figure 5 The plastic sheet 62 includes a positive electrode riveting portion 621, a venting portion 622, and a negative electrode riveting portion 623 arranged sequentially along its length. The positive electrode riveting portion 621 and the negative electrode riveting portion 623 are square, with a positive electrode hole 621a and a negative electrode hole 623a respectively located in their center. A riveting member 620 is provided around the positive electrode hole 621a and the negative electrode hole 623a on the side of the positive electrode riveting portion 621 and the negative electrode hole 623a facing the battery substrate 61. The riveting member 620 is used to insert into the riveting groove 610a of the battery substrate 61 to assemble the plastic sheet 62 and the battery substrate 61.

[0050] See Figure 1 , Figure 2 , Figure 4 and Figure 6The support platform 11 is provided with a plurality of first positioning portions 111 around the substrate groove 11a, and the lower surface of the pressure plate 12 is provided with a plurality of second positioning portions 121 corresponding to the first positioning portions 111. It can be understood that the first positioning portions 111 are configured to align with the second positioning portions 121, thereby aligning the pressure plate 12 and the support platform 11, and further enabling the alignment of the riveting member 620 and the riveting groove 610a of the battery substrate 61 and the plastic sheet 62 located on the support platform 11.

[0051] The first positioning part 111 and the second positioning part 121 can be, but are not limited to, a combination of protrusions and grooves, a magnetic component positioning combination, a snap-fit ​​component positioning combination, etc. The above are examples of the structures of the first positioning part 111 and the second positioning part 121 provided by this utility model, and should not be construed as limiting the structures of the first positioning part 111 and the second positioning part 121 provided by this utility model. Any combination of components that can achieve mutual alignment will fall within the protection scope of the first positioning part 111 and the second positioning part 121 provided by this utility model.

[0052] In some alternative implementations, see [link / reference] Figure 2 The vent 622 of the plastic sheet 62 is provided corresponding to the explosion-proof part 612 of the battery substrate 61. The vent 622 protrudes outward from the side opposite to the explosion-proof part 612 and has multiple vent holes 622a on the side opposite to the explosion-proof part 612. The positioning fixture 10 provided by this utility model is also described in reference. Figure 1 and Figure 2 The pressure plate 12 is disposed above the support platform 11, and its lower surface is provided with a positioning plug 122 for inserting a vent hole 622a into the plastic sheet 62. The positioning plug 122 is located at the center of the pressure plate 12, corresponding to the explosion-proof part 612 of the battery substrate 61 and the vent hole 622 of the plastic sheet 62. Optionally, the lower end of the positioning plug 122 is adapted to the shape of the vent hole 622a.

[0053] When the positioning fixture 10 provided by this utility model is applied to the assembly of the battery substrate 61 and the plastic sheet 62, the battery substrate 61 is first placed with the riveting groove 610a facing upwards into the substrate groove 11a to align the battery substrate 61 and the support platform 11. Then, the plastic sheet 62 is placed with the riveting piece 620 facing downwards, corresponding to the riveting groove 610a, on the battery substrate 61. The pressure plate 12 is driven to press down, causing the first positioning part 111 and the positioning part to align with each other, thereby aligning the pressure plate 12 and the support platform 11. Afterwards, the pressure plate 12 continues to press down until the positioning plug 122 is inserted into the vent hole 622a to align the pressure plate 12 and the plastic sheet 62. Finally, the pressure plate 12 is pressed down to the target position so that the riveting piece 620 is inserted into the riveting groove 610a of the battery substrate 61 to assemble the plastic sheet 62 and the battery substrate 61. The first positioning part 111, the second positioning part 121, the substrate groove 11a and the positioning plug 122 together enable the riveting part 620 on the plastic sheet 62 and the riveting groove 610a on the battery substrate 61 to achieve rapid and accurate alignment, thereby improving the riveting efficiency of the existing riveting device 1 used for assembling lithium battery cover plate assembly 60.

[0054] Please see Figure 7 and Figure 8 , Figure 7 This is another cross-sectional structural diagram of the positioning fixture provided by this utility model in an assembled state; Figure 8 yes Figure 7 A partially enlarged view of part I of the positioning fixture shown. In some preferred embodiments, a plurality of fasteners 112 are also provided on the support platform 11 around the substrate groove 11a, the plurality of fasteners 112 being configured to fix at least one of the battery substrate 61 and the plastic sheet 62.

[0055] It is understandable that although the substrate groove 11a on the support platform 11 is adapted to the shape of the battery substrate 61, gaps still exist between the battery substrate 61 and the substrate groove 11a in order to ensure that the battery substrate 61 can be safely, smoothly, and without damage placed into the substrate groove 11a. These gaps affect the alignment accuracy between the battery substrate 61 and the support platform 11. Based on the above problems, some embodiments provide multiple fasteners 112 around the substrate groove 11a. The fasteners 112 can fix the battery substrate 61, thereby further improving the alignment accuracy between the battery substrate 61 and the support platform 11.

[0056] It is understandable that although the positioning plug 122 can be inserted into the vent hole 622a to align the plastic sheet 62 and the pressure plate 12, the plastic sheet 62 has many grooves and protrusions on its upper and lower surfaces. When the pressure plate 12 presses down to assemble the battery substrate 61 and the plastic sheet 62, the plastic sheet 62 is prone to horizontal displacement under pressure, which affects the alignment accuracy of the plastic sheet 62 and the battery substrate 61, resulting in a decrease in the assembly quality of the plastic sheet 62 and the battery substrate 61. Based on this, some embodiments provide multiple fasteners 112 around the substrate groove 11a. The fasteners 112 can fix the plastic sheet 62, thereby further improving the alignment accuracy of the battery substrate 61 and the support platform 11.

[0057] It should be noted that the fixing member 112 can be, but is not limited to, a fixing buckle, fastener, fixing block, flexible fixing member, etc. The above are examples of the structure of the fixing member 112 provided by this utility model, and should not be construed as limiting the structure of the fixing member 112 provided by this utility model. It should be noted that the plurality of fixing members 112 are configured to fix at least one of the battery substrate 61 and the plastic sheet 62, which can be understood as: the fixing member 112 is used to fix the battery substrate 61; or the fixing member 112 is used to fix the plastic sheet 62; or a portion of the fixing members 112 is used to fix the battery substrate, and another portion of the fixing members 112 is used to fix the plastic sheet 62; or the fixing member 112 is configured to fix both the battery substrate 61 and the plastic sheet 62 simultaneously.

[0058] Please refer to it again. Figure 2 , Figure 7 and Figure 8 In some preferred embodiments, the fixing member 112 is configured to be drivable and slide into the substrate groove 11a until the engaging portion 1121 of the fixing member 112 extends into the substrate groove 11a. The engaging portion 1121 is configured such that its lower surface abuts against the upper surface of the edge portion of the battery substrate 61, thereby engaging and fixing the battery substrate 61 into the substrate groove 11a; and / or the inner surface of the engaging portion 1121 facing the plastic sheet 62 abuts against the outer periphery of the plastic sheet 62 to fix the horizontal position of the plastic sheet 62.

[0059] The engaging portion 1121 is configured such that its lower surface abuts against the upper surface of the edge portion of the battery substrate 61, thereby engaging and fixing the battery substrate 61 into the substrate groove 11a. When the fixing member 112 fixes the battery substrate 61 and the plastic sheet 62, multiple engaging portions 1121 located around the substrate groove 11a simultaneously extend into the substrate groove 11a. The lower surfaces of the multiple engaging portions 1121 abut against the upper surface of the edge portion of the battery substrate 61, and the battery substrate 61 is fixed in position under the combined action of the engaging portions 1121 and the substrate groove 11a.

[0060] The inner side of the engaging portion 1121 facing the plastic sheet 62 is used to abut against the outer periphery of the plastic sheet 62 to fix the horizontal position of the plastic sheet 62. When the fixing member 112 fixes the battery substrate 61 and the plastic sheet 62, a plurality of engaging portions 1121 located around the substrate groove 11a simultaneously extend into the substrate groove 11a, and the inner sides of the plurality of engaging portions 1121 simultaneously abut against the outer periphery of the plastic sheet 62. The plastic sheet 62 is fixed in a horizontal position under the abutment of the plurality of engaging portions 1121.

[0061] It is understood that the fastener 112 provided in this embodiment is a sliding engagement fastener. Figure 7 and Figure 8 A specific embodiment is illustrated. In this embodiment, the fastener 112 simultaneously secures the battery substrate 61 to the substrate groove 11a and fixes the plastic sheet 62 to a horizontal position. It should be noted that in other embodiments, the engaging portion 1121 may only engage and fix the battery substrate 61 into the substrate groove 11a by its lower surface abutting against the upper surface of the edge portion of the battery substrate 61, or it may only fix the plastic sheet 62 to a horizontal position by its inner surface abutting against the outer periphery of the plastic sheet 62.

[0062] Please refer to it again. Figure 5 , Figure 6 , Figure 7 and Figure 8 In some preferred embodiments, a plurality of the fixing members 112 are respectively provided in a one-to-one correspondence with a plurality of the first positioning parts 111; the first positioning part 111 is one of the insert 102 and the slot 101, and the second positioning part 121 is the other of the insert 102 and the slot 101; the insert 102 is configured to be inserted into the slot 101, directly or indirectly driving the fixing member 112 to slide toward the substrate groove 11a.

[0063] The first positioning part 111 is one of the insert 102 and the slot 101, and the second positioning part 121 is the other of the insert 102 and the slot 101. It is understood that in this embodiment, multiple inserts 102 are respectively inserted into multiple slots 101 to achieve alignment between the pressure plate 12 and the support platform 11. Optionally, the slot 101 has a shape adapted to the insert 102, thereby improving the alignment accuracy between the pressure plate 12 and the support platform 11.

[0064] The plurality of fixing members 112 are respectively arranged in a one-to-one correspondence with the plurality of first positioning parts 111, and the inserter 102 is configured to be inserted into the slot 101, directly or indirectly driving the fixing member 112 to slide toward the substrate groove 11a. In some optional embodiments, the insert 102 is configured to insert into the slot 101, thereby triggering an elastic member located at the bottom of the slot 101. The elastic member pops out toward the fixing member 112, thereby pushing the fixing member 112 to slide toward the substrate groove 11a. In some optional embodiments, the insert 102 is configured to be inserted into the slot 101 and pressed by the surface of the slot 101 toward the insert 102, thereby triggering an elastic member connected to the insert 102. The elastic member pops out toward the fixing member 112, thereby pushing the fixing member 112 to slide toward the substrate groove 11a. In some optional embodiments, the structure of the slot 101 can convert a portion of the vertical force applied when the pressure plate 12 is pressed down into a horizontal force to drive the fixing member 112 to slide toward the substrate groove 11a. In some optional embodiments, the structure of the insert 102 can convert a portion of the vertical force applied when the pressure plate 12 is pressed down into a horizontal force to drive the fixing member 112 to slide toward the substrate groove 11a.

[0065] It should be noted that the above are examples of how the inserter 102 described in this utility model is configured to be inserted into the slot 101 to directly or indirectly drive the fixing member 112 to slide towards the substrate groove 11a. This should not be interpreted as a limitation on the specific manner in which the inserter 102 described in this utility model is configured to be inserted into the slot 101 to directly or indirectly drive the fixing member 112 to slide towards the substrate groove 11a. Any inserter 102 and slot 101 structure that can achieve the sliding of the fixing member 112 towards the substrate groove 11a will fall within the protection scope of this utility model.

[0066] Please refer to it again. Figure 2 , Figure 7 and Figure 8 And please see Figure 9 , Figure 9 yes Figure 7A partially enlarged view of part II of the positioning fixture shown. In some preferred embodiments, the first positioning part 111 is a slot 101, and the second positioning part 121 is a insert 102. The slot 101 is disposed on the side of the fixing member 112 facing away from the substrate groove 11a, and the side of the fixing member 112 facing away from the substrate groove 11a is disposed in the slot 101 when not subjected to external force. The first side 112a of the fixing member 112 facing the slot 101 and the upper surface of the fixing member 112 are connected by a first inclined surface 112b, and the second side 102a of the insert 102 facing the plastic sheet 62 and the lower surface of the insert 102 are connected by a second inclined surface 102b. The inserter 102 is configured to press down so that the second inclined surface 102b fits against the first inclined surface 112b, and transmits a horizontal force to the fixing member 112 through the fitting surface, causing the fixing member 112 to slide towards the substrate groove 11a until the first side surface 112a abuts against the second side surface 102a.

[0067] The side of the fixing member 112 facing away from the substrate groove 11a is disposed within the slot 101 when not subjected to external force. It is understood that when the fixing member 112 provided in this embodiment is not subjected to external force, the first inclined surface 112b and the first side surface 112a are located within the slot 101. The insert 102 is configured to press down to make the second inclined surface 102b conform to the first inclined surface 112b. It is understood that in this embodiment, the first inclined surface 112b and the second inclined surface 102b have the same inclination angle.

[0068] When the pressure plate 12 provided in this embodiment presses down to assemble the battery substrate 61 and the plastic sheet 62, the pressure plate 12 is first driven to move vertically downward until the first inclined surface 112b contacts the second inclined surface 102b; then the pressure plate 12 continues to press down, and the first inclined surface 112b and the second inclined surface 102b decompose a portion of the downward force transmitted by the pressure plate 12 into a horizontal thrust that pushes the fixing member 112 to slide towards the substrate groove 11a, and a sliding friction force between the first inclined surface 112b and the second inclined surface 102b, thereby realizing the pushing of the fixing member 112 towards the substrate groove 11a. The fixing member 112 slides until the bend of the first inclined surface 112b and the first side surface 112a abuts against the bend of the second inclined surface 102b and the second side surface 102a. At this time, the engaging part 1121 extends into the substrate groove 11a. Then the pressure plate 12 continues to press down, the insert 102 is inserted into the slot 101, and the first side surface 112a abuts against the second side surface 102a, so that the insert 102 is limited by the slot 101 and the fixing member 112 to achieve the alignment of the pressure plate 12 and the support platform 11.

[0069] In some optional embodiments, the first inclined surface 112b and the first side surface 112a are smoothly connected, and the second inclined surface 102b and the second side surface 102a are smoothly connected, thereby making the insertion of the inserter 102 into the slot 101 smoother. In some optional embodiments, the support platform 11 is also provided with a plurality of limiting protrusions 113 corresponding to the slot 101 (see... Figure 2 , Figure 7 and Figure 9 The limiting protrusion 113 has a third side 113a facing away from the plastic sheet 62. When the inserter 102 is inserted into the slot 101, the third side 113a abuts against the first side 112a. The limiting protrusion 113 enhances the positioning accuracy of the positioning fixture 10.

[0070] Please refer to it again. Figure 3 , Figure 4 , Figure 5 and Figure 6 In some preferred embodiments, the support platform 11 is provided with six fixing members 112, wherein two fixing members 112 are respectively provided at both ends of the battery substrate 61, and the remaining four fixing members 112 are respectively provided at the two long rectangular sides of the battery substrate 61.

[0071] It is understandable that the battery substrate 61 and the plastic sheet 62 are mostly rectangular or approximately rectangular in shape, see reference. Figure 3 and Figure 4 In this embodiment, two fixing members 112 corresponding to both ends of the battery substrate 61 restrict the position of the battery substrate 61 and / or the plastic sheet 62 in its length direction, and four fixing members 112 corresponding to the two long rectangular sides of the battery substrate 61 restrict the position of the battery substrate 61 and / or the plastic sheet 62 in its width direction. The two fixing members 112 corresponding to each long rectangular side of the battery substrate 61 make the fixing of the battery substrate 61 and the position restriction of the plastic sheet 62 by the fixing members 112 more stable.

[0072] Please refer to it again. Figure 1 , Figure 2 , Figure 6 and Figure 7 And please see Figure 10 , Figure 10 yes Figure 7A partial enlarged view of part III of the positioning fixture shown. In some preferred embodiments, the lower surface of the pressure plate 12 is further provided with a plurality of pressing members 123, which are configured to be driven to press down against the plastic sheet 62, so that the battery substrate 61 and the plastic sheet 62 are riveted and fixed under the pressure of the support platform 11 and the pressing members 123.

[0073] Understandably, the surface of the plastic sheet 62 facing away from the battery substrate 61 is usually smooth but uneven. Directly holding the plastic sheet 62 against the battery substrate 61 by the lower surface of the pressure plate 12 to rivet and fix the plastic sheet 62 and the battery substrate 61 can easily cause displacement of the battery substrate 61 and the plastic sheet 62 during the pressing process, thereby affecting assembly efficiency and production quality. It can also easily cause the plastic sheet 62 to bend and deform, affecting the quality of the assembled cover plate assembly 60.

[0074] Based on the above technical problems, the positioning fixture 10 of the riveting device 1 for the battery cover provided in this embodiment has a plurality of pressing members 123 on the lower surface of the pressure plate 12 for pressing down the plastic sheet 62 to rivet the plastic sheet 62 and the battery substrate 61. The plurality of pressing members 123 disperses the force points of the pressure plate 12 on the plastic sheet 62, avoiding displacement of the plastic sheet 62 caused by the smooth surface of the plastic sheet 62 facing away from the battery substrate 61 coming into contact with the smooth lower surface of the pressure plate 12. In some optional embodiments, the shape of the pressing member 123 is adapted to the shape of the plastic sheet 62 facing away from the battery substrate 61, further avoiding the problem of bending and deformation of the plastic sheet 62 caused by the uneven plastic sheet 62 coming into contact with the flat lower surface of the pressure plate 12.

[0075] In some preferred embodiments, two pressing members 123 are provided on the lower surface of the pressure plate 12, and the two pressing members 123 are respectively provided corresponding to the positive electrode riveting portion 621 and the negative electrode riveting portion 623 of the plastic sheet 62. It can be understood that the provision of two pressing members 123 corresponding to the positive electrode riveting portion 621 and the negative electrode riveting portion 623 of the plastic sheet 62 can ensure the riveting quality during the pressing process while reducing the impact on other parts of the plastic sheet 62.

[0076] In some alternative implementations, see [link / reference] Figure 1 , Figure 2 and Figure 10The pressing member 123 includes a fixing part 1231 and a pressing part 1232 connected around the fixing part 1231. The two fixing parts 1231 are respectively configured to pass through the positive electrode hole 621a and the negative electrode hole 623a of the plastic sheet 62 to abut against the positive electrode part 611 and the negative electrode part 613 of the battery substrate 61. The two pressing parts 1232 are configured to abut against the positive electrode riveting part 621 on the side away from the battery substrate 61 and the negative electrode riveting part 623 on the side away from the battery substrate 61 of the plastic sheet 62, so that the battery substrate 61 and the plastic sheet 62 are riveted and fixed.

[0077] It is understood that in the above embodiment, the fixing part 1231 protrudes beyond the pressing part 1232. The fixing part 1231 firmly fixes the positive electrode part 611 and the negative electrode part 613 of the battery substrate 61 onto the support platform 11, further fixing the battery substrate 61 during the riveting process and preventing displacement caused by pressure on the battery substrate 61 during riveting. The pressing part 1232 realizes the riveting of the plastic sheet 62 and the battery substrate 61. In the above embodiment, the amount of downward pressure on the plastic part can be controlled by setting the length of the fixing part 1231 extending beyond the pressing part 1232, thus avoiding damage to the battery components caused by excessive downward pressure.

[0078] Please refer to it again. Figure 1 , Figure 2 , Figure 3 , Figure 4 ,and Figure 5 In some preferred embodiments, the upper surface of the support platform 11 is further provided with a foolproof member 114. The foolproof member 114 is provided corresponding to the substrate casting hole 610b of the battery substrate 61 and is configured to be inserted sequentially into the substrate casting hole 610b and the plastic sheet casting hole 620a of the plastic sheet 62 to prevent the battery substrate 61 and the plastic sheet 62 from being connected in reverse.

[0079] It is understood that the plastic sheet 62 is provided with a plastic sheet casting hole 620a, and the battery substrate 61 is provided with a substrate casting hole 610b. After the unicorn and the battery substrate 61 are riveted together, the plastic sheet casting hole 620a and the substrate casting hole 610b form a casting channel. (See reference...) Figure 4 The existing plastic sheet 62 has a relatively symmetrical shape, making it easy to reverse it, causing the plastic sheet 62 and the battery substrate 61 to be connected incorrectly, resulting in the inability to cast the cover plate assembly 60 after assembly. Based on the above technical problems, the support platform 11 provided in this embodiment is provided with a foolproof component 114 corresponding to the casting hole 610b of the substrate on its upper surface, which can effectively prevent the battery substrate 61 and the plastic sheet 62 from being connected incorrectly.

[0080] Please refer to it again. Figure 1 And please see Figure 11 , Figure 11 This is a cross-sectional structural diagram of the riveting device provided by this utility model. This utility model provides a riveting device 1, which includes the aforementioned positioning fixture 10 and a pressing assembly 20. The pressing assembly 20 is configured to drive the pressure plate 12 downwards, causing the battery substrate 61 and the plastic sheet 62 to be riveted and fixed under the pressure of the support platform 11 and the pressure plate 12.

[0081] It is understood that the riveting device 1 provided by this utility model is applied to the manufacturing of the cover plate assembly 60 of a lithium battery, specifically to the riveting assembly of the battery substrate 61 and the plastic sheet 62. The positioning fixture 10 includes a support platform 11 and a pressure plate 12. The support platform 11 supports the battery substrate 61 and the plastic sheet 62 placed on the battery substrate 61. The pressure plate 12 is driven downward by the pressing assembly 20, causing the riveting member 620 of the plastic sheet 62 to insert into the riveting groove 610a of the battery substrate 61, thereby achieving the assembly of the battery substrate 61 and the plastic sheet 62.

[0082] The pressing assembly 20 is configured to drive the pressure plate 12 downwards. The pressing assembly 20 can be, but is not limited to, a pneumatic pressing device, an electric pressing device, etc. For some specific embodiments, see [reference needed]. Figure 9 The pressing assembly 20 is a pneumatic pressing device, located above the positioning fixture 10, and connected to the positioning fixture 10 via a frame 50. The above is an example of the structure of the pressing assembly 20 provided by this utility model and should not be construed as limiting the structure of the pressing assembly 20 provided by this utility model.

[0083] In some optional embodiments, the riveting device 1 further includes a control host 30, which is configured to control at least one of the pressing rate and pressing pressure of the pressing assembly 20. The control host 30 can provide automatic control of the pressing assembly 20 by controlling the pressing rate and pressing pressure. In some optional embodiments, the riveting device 1 further includes a monitor 40, which is configured to monitor at least one of the pressure and pressing amount of the pressing assembly 20. Optionally, the monitor 40 can transmit the pressure and pressing pressure monitoring data of the pressing assembly 20 to the control host 30, which analyzes the test results and guides the action of the pressing assembly 20, thereby achieving automatic control of the riveting device 1.

[0084] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Those skilled in the art should understand that the above embodiments or implementations are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or implementations, or equivalent substitutions can be made to some technical features, without departing from the scope and spirit of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the different embodiments or implementations can be combined in any manner.

Claims

1. A positioning fixture (10), characterized in that, The positioning fixture (10) includes: A support platform (11) for supporting a battery substrate (61) has a substrate groove (11a) adapted to the shape of the battery substrate (61), and the support platform (11) is provided with a plurality of first positioning portions (111) around the substrate groove (11a); and A pressure plate (12) is disposed above the support platform (11), and its lower surface is provided with a positioning plug (122) for inserting a vent hole (622a) for inserting a plastic sheet (62) and a plurality of second positioning parts (121) corresponding to the first positioning part (111). The second positioning part (121) is configured to be aligned with the first positioning part (111) so that the rivet (620) on the plastic sheet (62) and the rivet groove (610a) on the battery substrate (61) are aligned.

2. The positioning fixture (10) according to claim 1, characterized in that, The support platform (11) is also provided with a plurality of fasteners (112) around the substrate groove (11a), the plurality of fasteners (112) being configured to fix at least one of the battery substrate (61) and the plastic sheet (62).

3. The positioning fixture (10) according to claim 2, characterized in that, The fixing member (112) is configured to be drivable and slide into the substrate groove (11a) until the engaging portion (1121) of the fixing member (112) extends into the substrate groove (11a), and the engaging portion (1121) is configured as follows: The lower surface is used to abut against the upper surface of the edge portion of the battery substrate (61) to engage and fix the battery substrate (61) into the substrate groove (11a); and / or the inner side of the engaging portion (1121) facing the plastic sheet (62) is used to abut against the outer periphery of the plastic sheet (62) to fix the horizontal position of the plastic sheet (62).

4. The positioning fixture (10) according to claim 3, characterized in that, Each of the aforementioned fasteners (112) is respectively provided in a one-to-one correspondence with a plurality of the first positioning parts (111); the first positioning part (111) is one of the insert (102) and the slot (101), and the second positioning part (121) is the other of the insert (102) and the slot (101); The inserter (102) is configured to insert into the slot (101) and directly or indirectly drive the fixing member (112) to slide towards the substrate groove (11a).

5. The positioning fixture (10) according to claim 4, characterized in that, The first positioning part (111) is a slot (101), and the second positioning part (121) is a insert (102). The slot (101) is disposed on the side of the fixing member (112) away from the substrate groove (11a), and the side of the fixing member (112) away from the substrate groove (11a) is disposed in the slot (101) when not subjected to external force. The first side (112a) of the fastener (112) facing the slot (101) and the upper surface of the fastener (112) are connected by a first inclined surface (112b), and the second side (102a) of the insert (102) facing the plastic sheet (62) and the lower surface of the insert (102) are connected by a second inclined surface (102b). The insert (102) is configured to press down to make the second inclined surface (102b) fit against the first inclined surface (112b), and transmit a horizontal force to the fixing member (112) through the fitting surface of the insert (102) and the fixing member (112), driving the fixing member (112) to slide towards the substrate groove (11a) until the first side surface (112a) abuts against the second side surface (102a).

6. The positioning fixture (10) according to any one of claims 2-5, characterized in that, The support platform (11) is provided with six fixing members (112), two of which are respectively provided at both ends of the battery substrate (61), and the remaining four fixing members (112) are respectively provided at the two long rectangular sides of the battery substrate (61).

7. The positioning fixture (10) according to any one of claims 1-5, characterized in that, The lower surface of the pressure plate (12) is also provided with a plurality of pressing parts (123). The pressing parts (123) are configured to be driven to press down against the plastic sheet (62), so that the battery substrate (61) and the plastic sheet (62) are riveted and fixed under the pressure of the support platform (11) and the pressing parts (123).

8. The positioning fixture (10) according to claim 7, characterized in that, Two pressing parts (123) are provided on the lower surface of the pressure plate (12), and the two pressing parts (123) are respectively provided for the positive electrode riveting part (621) and the negative electrode riveting part (623) of the plastic sheet (62).

9. The positioning fixture (10) according to any one of claims 1-5, characterized in that, The upper surface of the support platform (11) is also provided with a foolproof component (114). The foolproof component (114) is provided corresponding to the substrate casting hole (610b) of the battery substrate (61) and is configured to be inserted into the substrate casting hole (610b) and the plastic sheet casting hole (620a) of the plastic sheet (62) in sequence to prevent the battery substrate (61) and the plastic sheet (62) from being reversed.

10. A riveting device (1), characterized in that, The riveting device (1) includes: The positioning fixture (10) according to any one of claims 1-9; and The pressing assembly (20) is configured to drive the pressure plate (12) to press down so that the battery substrate (61) and the plastic sheet (62) are riveted and fixed under the pressure of the support platform (11) and the pressure plate (12).

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