Battery cover positioning fixture and positioning installation method

Abstract

This invention relates to a battery cover positioning fixture and positioning installation method, comprising: a positioning support, wherein the top surface of the positioning support is provided with positioning bosses for positioning the battery cover at both ends in the length direction, and positioning blocking portions are provided at both ends of the top surface in the length direction, and the positioning blocking portions are arranged around the positioning bosses; the surface of the positioning boss is provided with a receiving platform, and the positioning support is provided with a lifting drive structure connected to the receiving platform for driving the receiving platform to rise and protrude from the surface of the positioning boss to receive a sealing ring; and the receiving platform can be lowered under the driving action of the lifting drive structure so that the sealing ring is embedded in the mounting hole of the battery cover.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and in particular to a battery cover positioning fixture and positioning installation method. Background Technology

[0002] Lithium-ion batteries, due to their advantages such as high capacity density, high specific energy, and long cycle life, have become the preferred batteries for portable electronic products, electric vehicles, and energy storage, and are increasingly widely used. A lithium-ion battery mainly consists of the following parts: a cell formed by winding positive electrode sheets, a separator, and a negative electrode sheet stacked sequentially; a casing covering the cell; a battery cover plate on top of the casing; and first and second terminals and an injection hole for injecting electrolyte on the battery cover plate.

[0003] Because lithium-ion batteries contain a large amount of chemical substances, a large amount of mixed gas is generated during charging and discharging, causing pressure to continuously accumulate inside the battery. If this pressure is not released in time, it can lead to an explosion. To prevent battery explosions, the pressure accumulated inside the battery needs to be released. The most common measure is to install a safety protection device on the battery top cover. Currently, the most common safety protection device involves stamping a longitudinal through hole in the battery top cover and then directly welding an explosion-proof sheet.

[0004] However, the battery top cover has poor strength and is very easy to deform during production and processing. After deformation, it cannot meet the requirements for the flatness of the battery cover when installing the sealing ring, positive terminal post, negative terminal post, and welding explosion-proof sheet, resulting in a high scrap rate. Summary of the Invention

[0005] Therefore, it is necessary to provide a battery cover positioning fixture and positioning installation method to address the above problems.

[0006] A positioning fixture for a battery cover includes: a positioning support, wherein the top surface of the positioning support has positioning bosses at both ends along its length for positioning the battery cover, and positioning guard portions are respectively provided at the edges of both ends along the length of the top surface, and the positioning guard portions are arranged around the positioning bosses; the surface of the positioning bosses is provided with a receiving platform, and the positioning support has a lifting drive structure inside, which is connected to the receiving platform, for driving the receiving platform to rise and protrude from the surface of the positioning bosses to receive a sealing ring; and the receiving platform can be lowered under the driving action of the lifting drive structure so that the sealing ring is embedded in the mounting hole of the battery cover.

[0007] In some embodiments, the lifting drive structure includes:

[0008] A push rod is inserted from the outside along the width direction of the positioning support into the first side of the positioning support;

[0009] A driving block is disposed inside the positioning support. The driving block is connected to the inner end of the top rod and can cooperate with the linear guide rail built into the positioning support to move along the width direction of the positioning support. The top of the driving block is provided with a driving surface that gradually slopes downward along the insertion direction of the top rod. The angle between the driving surface and the bottom surface of the positioning support is an acute angle.

[0010] The follower wheel has an axis of rotation parallel to the length direction of the positioning support, and the circumferential surface of the follower wheel is in contact with the inclined driving surface. The axis of rotation of the follower wheel is fixedly connected to the bottom of the receiving platform, and it can roll upward along the inclined surface when the push rod drives the driving block to move away from the first side.

[0011] In some embodiments, the lifting drive structure further includes a connecting plate disposed at the bottom of the receiving platform. A guide pin and a guide spring are connected to the connecting plate. The guide pin and the guide spring extend upward and are embedded at their top into a positioning cavity opened in the positioning support.

[0012] In some embodiments, there are two guide pins and two guide springs, symmetrically arranged on both sides of the receiving platform. This symmetrical arrangement ensures smooth guiding and further reduces the probability of the receiving platform deviating in the lifting direction.

[0013] In some embodiments, the lifting drive structure further includes a spring-back mechanism, which includes a guide rod and a first spring sleeved on the surface of the guide rod. The guide rod is located along the width direction on the side of the drive block away from the top rod. One end of the guide rod is connected to the drive block, and the other end passes through the second side of the positioning support. The two ends of the first spring abut against the inner wall of the second side and the drive block, respectively.

[0014] In some embodiments, there are two or more positioning supports arranged sequentially along the width direction; the lifting drive structure further includes a linkage rod disposed between two adjacent positioning supports, with the two ends of the linkage rod inserted into one positioning support from the outside along the width direction from the second side and into another adjacent positioning support from the first side, and the two ends of the linkage rod being connected to the drive block in the two positioning supports respectively.

[0015] In some embodiments, a second spring is fitted onto the portion of the linkage rod near the top rod and placed on the positioning support, with the two ends of the second spring abutting against the inner wall of the second side and the drive block, respectively.

[0016] In some embodiments, there are two or more positioning supports, and the lifting drive structures of adjacent positioning supports that are at the same position in the length direction are connected by a linkage rod.

[0017] In some embodiments, the positioning enclosure includes three positioning enclosure blocks, which are respectively located at the end in the length direction and on both sides in the width direction.

[0018] In some embodiments, the positioning boss is square and protrudes 2-5mm from the top surface.

[0019] A positioning installation method includes the following steps:

[0020] The battery cover to be assembled is placed on the positioning support. Both ends of the battery cover in the length direction are positioned by positioning bosses. The mounting holes on the battery cover are set to correspond to the receiving platform a of the positioning support.

[0021] When a sealing ring needs to be installed, the lifting drive structure is operated to drive the receiving platform a to rise and protrude from the surface of the positioning boss;

[0022] The sealing ring is placed on the receiving platform, and the receiving platform a is lowered under the driving action of the lifting drive structure so that the sealing ring is coaxially embedded into the mounting hole of the battery cover, thereby realizing the assembly of the sealing ring.

[0023] The aforementioned battery cover positioning fixture has at least the following beneficial technical effects:

[0024] This embodiment enables the assembly of the sealing ring; the positioning fixture provides a positioning space for the battery cover. After the battery cover is placed on its surface, the positioning boss can cooperate to position and support the electrode mounting parts on both sides of the battery cover in the length direction. After the battery cover is positioned, the structure is stable and will not bend or deform when it moves or is assembled on the production line. It can meet the requirements for the flatness of the battery cover when installing the positive terminal post, negative terminal post, or welding the explosion-proof sheet, thus improving the assembly yield.

[0025] In this embodiment, the positioning barrier is arranged around the circumference of the battery cover to limit the positioning of the battery cover. This works together with the positioning boss to prevent the battery cover from slipping on the surface of the positioning support when the positioning fixture moves on the production line, which would prevent the terminal posts and other parts from being assembled in the preset manner, or cause the product to be scrapped due to the deviation in the assembly position. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a battery cover positioning fixture provided in an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A partial sectional view;

[0028] Figure 3 for Figure 2 Sectional view along axis AA;

[0029] Figure 4 for Figure 1 A schematic diagram of the structure after removing one positioning support;

[0030] Figure 5 for Figure 4 A diagram showing the state of the lifting and lowering drive structure after the receiving platform has been raised.

[0031] Figure 6 A schematic diagram of the sealing ring being assembled to the battery cover;

[0032] In the diagram, 1000 is the positioning fixture; 1100 is the positioning support; 1101 is the positioning boss; 1101a is the receiving platform; 1102 is the positioning enclosure; 1200 is the lifting drive structure; 1201 is the top rod; 1202 is the drive block; 1202a is the drive surface; 1203 is the linear guide rail; 1204 is the follower wheel; 1205 is the connecting plate; 1206 is the guide pin; 1207 is the guide spring; 1208a is the guide rod; 1208b is the first spring; 1209 is the linkage rod; 1209a is the second spring; 10 is the battery cover; 101 is the mounting hole; and 102 is the sealing ring. Detailed Implementation

[0033] The invention will now be further described with reference to the accompanying drawings.

[0034] To facilitate understanding of the present invention, various embodiments as defined by the claims will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings, which include various specific details to aid this understanding, but these details should be considered merely exemplary. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Accordingly, those skilled in the art will recognize that variations and modifications can be made to the various embodiments described herein without departing from the scope of the invention as defined by the appended claims. Furthermore, descriptions of well-known functions and constructions may be omitted for clarity and brevity.

[0035] It will be apparent to those skilled in the art that the following description of various embodiments of the invention is provided for illustrative purposes only and is not intended to limit the invention as defined by the appended claims.

[0036] Throughout the specification and claims of this application, the words “comprising” and “including,” as well as variations thereof, such as “comprising of” and “including,” mean “including but not limited to,” and are not intended to exclude other components, elements, or steps. Features, elements, or characteristics described in connection with a particular aspect, embodiment, or example of the invention are to be understood as applicable to any other aspect, embodiment, or example described herein, unless incompatible therewith.

[0037] It should be understood that the singular forms “a,” “an,” and “the” include plural references unless the context explicitly specifies otherwise. The expressions “comprising” and / or “may comprise” as used in this invention are intended to indicate the presence of a corresponding function, operation, or element, and are not intended to limit the presence of one or more functions, operations, and / or elements. Furthermore, in this invention, the terms “comprising” and / or “having” are intended to indicate the presence of the features, quantities, operations, elements, and components disclosed in the applications, or combinations thereof. Therefore, the terms “comprising” and / or “having” should be understood as implying the additional possibility of one or more other features, quantities, operations, elements, and components, or combinations thereof.

[0038] In this invention, the expression "or" includes any or all combinations of the words listed together. For example, "A or B" can include either A or B, or it can include both A and B.

[0039] It should be understood that when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element; when an element is said to be "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or there may be an intervening element at the same time.

[0040] The terms "up," "down," "left," and "right" mentioned in the text are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms (such as those defined in common dictionaries) should be interpreted as having the meaning consistent with the relevant field and the context of this specification, and should not be interpreted in an idealized or overly formal sense unless expressly defined herein. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0042] like Figure 1 As shown, in one embodiment of the present invention, a positioning fixture for a battery cover is provided, comprising:

[0043] The positioning support 1100 has positioning bosses 1101 for positioning the battery cover 10 at both ends of its top surface in the length direction. Positioning enclosure portions 1102 are provided at both ends of the top surface in the length direction, and the positioning enclosure portions 1102 are arranged around the positioning bosses 1101.

[0044] The surface of the positioning boss 1101 is provided with a receiving platform 1101a. The positioning support 1100 is provided with a lifting drive structure 1200 inside, which is connected to the receiving platform 1101a. It is used to drive the receiving platform 1101a to rise and protrude from the surface of the positioning boss 1101 to receive the sealing ring 102. The receiving platform 1101a can also be lowered under the driving action of the lifting drive structure 1200 so that the sealing ring 102 can be embedded in the mounting hole 101 of the battery cover plate 10.

[0045] Specifically, the battery cover 10 to be assembled is placed on the positioning support 1100, and both ends of the battery cover 10 in the length direction are positioned by positioning bosses 1101. The battery cover 10 is provided with mounting holes 101, and the mounting holes 101 are correspondingly set with the receiving platform 1101a. When the sealing ring 102 needs to be installed, the lifting drive structure 1200 drives the receiving platform 1101a to rise and protrude from the surface of the positioning bosses 1101. At this time, the sealing ring 102 is fitted onto the receiving platform 1101a. Then, the receiving platform 1101a is lowered under the driving action of the lifting drive structure 1200 so that the sealing ring 102 is just coaxially embedded into the mounting hole 101 of the battery cover 10, thereby realizing the assembly of the sealing ring 102.

[0046] This embodiment enables the assembly of the sealing ring 102; the positioning fixture 1000 provides a positioning space for the battery cover 10. After the battery cover 10 is placed on its surface, the positioning boss 1101 can cooperate to position and support the electrode mounting parts on both sides of the length direction of the battery cover 10. After the battery cover 10 is positioned, the structure is stable and will not bend or deform when it is moved or assembled on the production line. It can meet the requirements for the flatness of the battery cover 10 when installing the positive terminal post, the negative terminal post, or welding the explosion-proof sheet, thereby improving the assembly yield.

[0047] The positioning enclosure 1102 is arranged around the circumference of the battery cover 10 to limit the battery cover 10. It works together with the positioning boss 1101 to prevent the battery cover 10 from sliding on the surface of the positioning support 1100 when the positioning fixture 1000 moves on the production line, which would prevent the terminal post and other parts from being assembled in the preset manner, or cause the product to be scrapped due to the deviation of the assembly position.

[0048] refer to Figure 2 and Figure 3In some embodiments, the lifting drive structure 1200 includes:

[0049] The top rod 1201 is inserted into the first side of the positioning support 1100 from the outside along the width direction of the positioning support 1100;

[0050] A drive block 1202 is disposed inside the positioning support 1100. The drive block 1202 is connected to the inner end of the push rod 1201 and can move along the width direction of the positioning support 1100 along the linear guide 1203 built into the positioning support 1100. The top of the drive block 1202 is provided with a drive surface 1202a that gradually slopes downward along the insertion direction of the push rod 1201. The angle between the drive surface 1202a and the bottom surface of the positioning support 1100 is an acute angle.

[0051] The follower wheel 1204 has an axis parallel to the length direction of the positioning support 1100, and its circumferential surface is in contact with the inclined driving surface 1202a. The axis of rotation of the follower wheel 1204 is fixedly connected to the bottom of the receiving platform 1101a, and is used to roll upward along the inclined surface when the push rod 1201 drives the driving block 1202 to move away from the first side.

[0052] Specifically, the push rod 1201 moves into the positioning support 1100 along the insertion direction, simultaneously pushing the drive block 1202 to move. As the drive block 1202 moves, the follower wheel 1204 rolls upward along the inclined surface, thereby driving the receiving platform 1101a to move upward.

[0053] The lifting drive structure 1200 in this embodiment can convert the horizontal driving force of the top rod 1201 into the vertical driving force, saving the vertical arrangement space of the entire structure and reducing the overall thickness. The inclined surface driving method can ensure smooth lifting and achieve stepless fine adjustment of the lifting height with high adjustment accuracy. In addition, the follower wheel 1204 can roll along the inclined drive surface 1202a, with low frictional resistance, smooth movement without jamming, and no noise due to friction.

[0054] refer to Figure 3 In some embodiments, the lifting drive structure 1200 further includes a connecting plate 1205 located at the bottom of the receiving platform 1101a. A guide pin 1206 and a guide spring 1207 are connected to the connecting plate 1205. The guide pin 1206 and the guide spring 1207 extend upward and are embedded at their tops into the positioning cavity opened in the positioning support 1100.

[0055] Specifically, the guide pin 1206 and the guide spring 1207 can provide guidance for the lifting and lowering of the receiving platform 1101a, ensuring that it always moves in the vertical direction, and avoiding the inability to assemble the sealing ring 102 and other parts in the preset manner due to tilting or deviation in the moving direction, or the product being scrapped due to the misalignment of the sealing ring 102 assembly position.

[0056] refer to Figure 3 In some embodiments, there are two guide pins 1206 and two guide springs 1207, symmetrically arranged on both sides of the receiving platform 1101a. This symmetrical arrangement ensures smooth guidance and further reduces the probability of the receiving platform 1101a deviating in the lifting direction.

[0057] refer to Figure 2 In some embodiments, the lifting drive structure 1200 further includes a spring-back mechanism, which includes a guide rod 1208a and a first spring 1208b sleeved on the surface of the guide rod 1208a. The spring-back mechanism is located on the side of the drive block 1202 away from the top rod 1201 along the width direction. One end of the guide rod 1208a is connected to the drive block 1202, and the other end passes through the second side of the positioning support 1100. The two ends of the first spring 1208b abut against the inner wall of the second side and the drive block 1202, respectively.

[0058] Specifically, when the push rod 1201 moves into the positioning support 1100 along the insertion direction and drives the receiving platform 1101a to move upward, the guide rod 1208a also moves along the insertion direction of the push rod 1201. At this time, since the two ends of the first spring 1208b abut against the inner wall of the second side and the drive block 1202 respectively, the first spring 1208b will be compressed and store energy. When it is necessary to operate the raised receiving platform 1101a to descend, the push rod 1201 is released. At this time, the compressed first spring 1208b rebounds and releases energy, pushing the drive block 1202 to move in the opposite direction, and the follower wheel 1204 rolls downward along the inclined surface, thereby driving the receiving platform 1101a to move downward and reset.

[0059] In this embodiment, the first spring 1208b is used to reset the lifting drive structure 1200, eliminating the need for reverse operation of the top rod 1201 and saving energy. The guide rod 1208a ensures that the rebound direction of the first spring 1208b is stable, ensuring that it is always compressed and extended in the preset direction. This avoids damage to the mechanism due to deviation in the compression or rebound direction, preventing the receiving platform 1101a from descending normally, which in turn prevents the assembly of components such as the sealing ring 102 in the preset manner, or causes product scrap due to deviation in the assembly position of the sealing ring 102.

[0060] refer to Figure 2In some embodiments, there are two or more positioning supports 1100, arranged sequentially along the width direction; the lifting drive structure 1200 also includes a linkage rod 1209, which is disposed between two adjacent positioning supports 1100. The two ends of the linkage rod 1209 are respectively inserted into one positioning support 1100 from the outside along the width direction from the second side and into another adjacent positioning support 1100 from the first side, and the two ends of the linkage rod 1209 are respectively connected to the drive block 1202 in the two positioning supports 1100.

[0061] Specifically, the push rod 1201 moves into the positioning support 1100 along the insertion direction, simultaneously pushing the drive block 1202 to move. As the drive block 1202 moves, the follower wheel 1204 rolls upward along the inclined surface, thereby driving the receiving platform 1101a to move upward. At the same time as the drive block 1202 moves, it drives the drive block 1202 in the adjacent positioning support 1100 to move in the same direction through the linkage rod 1209, thereby enabling the receiving platform 1101a in the other positioning support 1100 to move upward.

[0062] In this embodiment, multiple positioning supports 1100 are arranged simultaneously. The movement of a top rod 1201 can realize the lifting and lowering of multiple receiving platforms 1101a, thereby realizing the assembly of sealing rings 102 on multiple battery cover plates 10. The positioning fixture 1000 provides positioning space for multiple battery cover plates 10. After the multiple battery cover plates 10 are positioned, the structure is stable and will not bend or deform when they move or are assembled on the production line. It can meet the requirements for the flatness of the battery cover plates 10 when installing positive and negative terminals or welding explosion-proof sheets, thereby improving the yield and work efficiency of assembly.

[0063] refer to Figure 2 In some embodiments, a second spring 1209a is sleeved on the part of the linkage rod 1209 near the top rod 1201 and placed on the positioning support 1100. The two ends of the second spring 1209a abut against the inner wall of the second side and the driving block 1202, respectively.

[0064] Specifically, when the push rod 1201 moves into the positioning support 1100 along the insertion direction and drives the receiving platform 1101a to move upward, the linkage rod 1209 also moves along the insertion direction of the push rod 1201. At this time, since the two ends of the second spring 1209a abut against the inner wall of the second side and the drive block 1202 respectively, the second spring 1209a will be compressed and store energy. When it is necessary to operate the raised receiving platform 1101a to descend, the push rod 1201 is released. At this time, the compressed second spring 1209a rebounds and releases energy, pushing the drive block 1202 to move in the opposite direction, and the follower wheel 1204 rolls downward along the inclined surface, thereby driving the receiving platform 1101a to move downward and reset.

[0065] In this embodiment, the second spring 1209a is used to reset the lifting drive structure 1200, eliminating the need for reverse operation of the top rod 1201 and saving energy. The linkage rod 1209 can ensure the stability of the rebound direction of the second spring 1209a, ensuring that it is always compressed and extended in the preset direction. This avoids damage to the mechanism due to deviation in the compression or rebound direction, preventing the receiving platform 1101a from descending normally, which in turn prevents the assembly of components such as the sealing ring 102 in the preset manner, or causes product scrap due to deviation in the assembly position of the sealing ring 102.

[0066] refer to Figure 2 In some embodiments, there are two or more positioning supports 1100, and the lifting drive structures 1200 of adjacent positioning supports 1100 are connected by a linkage rod 1209, which are arranged sequentially along the width direction and are located at the same position along the length direction.

[0067] In this embodiment, multiple positioning supports 1100 are arranged simultaneously. Through the linkage rod 1209, the synchronous lifting and lowering of multiple receiving platforms 1101a can be realized, thereby realizing the assembly of sealing rings 102 on multiple battery cover plates 10. The multiple positioning supports 1100 of the positioning fixture 1000 provide positioning and placement space for multiple battery cover plates 10. After the multiple battery cover plates 10 are positioned, the structure is stable and will not bend or deform when they move or are assembled on the production line at the same time. This can meet the requirements for the flatness of the battery cover plates 10 when installing positive and negative terminals or welding explosion-proof sheets, thereby improving the yield and work efficiency of the assembly.

[0068] refer to Figure 1 In some embodiments, the positioning enclosure 1102 includes three positioning enclosure blocks, which are respectively located at the end in the length direction and on both sides in the width direction. In this embodiment, a total of six positioning enclosure blocks are arranged around the circumference of the battery cover 10 to enclose and limit the battery cover 10, thereby working together with the positioning boss 1101 to prevent the battery cover 10 from slipping on the surface of the positioning support 1100 when the positioning fixture 1000 moves on the production line.

[0069] refer to Figure 1 In some embodiments, the positioning boss 1101 is square and protrudes 2-5mm from the top surface. Actual usage tests show that the positioning boss 1101 with this design shape and size will not be suspended in the middle due to being too high, nor will it be damaged due to being too low, causing the middle of the battery cover 10 to come into contact with the surface of the positioning support 1100. This achieves stable positioning and support for the electrode mounting portions on both sides of the battery cover 10 along its length. After being positioned, the battery cover 10 has a stable structure and will not bend or deform.

[0070] In the above description, although expressions such as "first" and "second" may be used to describe various elements of the invention, they are not intended to limit the corresponding elements. For example, the above expressions are not intended to limit the order or importance of corresponding elements. The above expressions are used to distinguish one component from another.

[0071] The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. Singular expressions include plural expressions unless there are significant differences in context or approach between them.

[0072] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

[0073] Those skilled in the art will understand that the technical features of the above embodiments can be omitted, added, or combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, and simple transformations that those skilled in the art can conceive of, as well as structural transformations that adapt to and functionally modify the prior art, should be considered within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that although the present invention has been shown and described with reference to various embodiments, those skilled in the art can make various modifications and improvements in form and detail without departing from the concept of the present invention, and without departing from the scope of the invention as defined by the appended claims. All such modifications and improvements fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A battery cover positioning jig, comprising: a positioning support, a top surface of the positioning support being provided with positioning bosses at both ends in a length direction for positioning a battery cover, edges of the top surface at both ends in the length direction being provided with positioning fences, and the positioning fences being provided corresponding to the positioning bosses; a surface of the positioning boss being provided with a receiving platform, the positioning support being internally provided with a lifting driving structure connected to the receiving platform for driving the receiving platform to rise out of the surface of the positioning boss to receive a sealing ring, the sealing ring being fitted on the receiving platform, and the receiving platform and the sealing ring being capable of descending under the driving action of the lifting driving structure to embed the sealing ring into a mounting hole of the battery cover; the lifting driving structure comprising: a top rod inserted into a first side of the positioning support along a width direction of the positioning support from outside; a driving block provided in the positioning support, the driving block being connected to an inner end of the top rod and being capable of moving along the width direction of the positioning support in cooperation with a linear guide internally provided in the positioning support, a top portion of the driving block being provided with a driving surface gradually inclined downward along a direction of insertion of the top rod, and an included angle between the driving surface and a bottom surface of the positioning support being an acute angle; a follower wheel, an axis of a rotating shaft of the follower wheel being parallel to the length direction of the positioning support, a circumferential surface of the follower wheel being in contact with the inclined driving surface, the rotating shaft of the follower wheel being fixedly connected to a bottom portion of the receiving platform and being capable of rolling upward along the inclined surface and driving the receiving platform to move upward when the top rod drives the driving block to move away from the first side, and being capable of rolling downward along the inclined surface and driving the receiving platform and the sealing ring to descend when the top rod drives the driving block to move toward the first side. 2.The battery cover positioning jig according to claim 1, wherein the lifting driving structure further comprises a connecting plate provided at the bottom portion of the receiving platform, the connecting plate being provided with a guide pin and a guide spring connected thereto, the guide pin and the guide spring respectively extending upward and having top portions embedded in positioning cavities provided in the positioning support. 3.The battery cover positioning jig according to claim 2, wherein the guide pin and the guide spring are respectively provided with two guide pins and two guide springs symmetrically provided at both sides of the receiving platform. 4.The battery cover positioning jig according to claim 1, wherein the lifting driving structure further comprises a rebound mechanism, the rebound mechanism comprising a guide rod and a first spring sleeved on a surface of the guide rod, the guide rod being provided at a side of the driving block away from the top rod in the width direction, one end of the guide rod being connected to the driving block and the other end of the guide rod penetrating through a second side of the positioning support, and both ends of the first spring being respectively abutted against an inner wall of the second side and the driving block. 5.The battery cover positioning jig according to claim 1, wherein ​ The positioning supports are two or more and are arranged in sequence along the width direction; the lifting driving structure further comprises a linkage rod arranged between two adjacent positioning supports, two ends of the linkage rod are respectively inserted into one positioning support from the second side and into another adjacent positioning support from the first side along the width direction from outside, and the two ends of the linkage rod are respectively connected with the driving blocks in the two positioning supports.

6. The battery cover positioning jig according to claim 5, wherein The part of the linkage rod close to the top rod and placed in the positioning support is sleeved with a second spring, two ends of the second spring are respectively abutted against the inner wall of the second side and the driving block.

7. The battery cover positioning jig according to claim 1, wherein The positioning supports are two or more and are arranged in sequence along the width direction and are connected by linkage rods between the lifting driving structures at the same position along the length direction of adjacent positioning supports.

8. The battery cover positioning jig according to claim 1, wherein The positioning enclosure comprises three positioning enclosure blocks, and the three positioning enclosure blocks are respectively arranged at the length direction end and the width direction two sides.

9. A positioning and mounting method using the battery cover positioning jig according to any one of claims 1-8, comprising the following steps: The battery cover to be assembled is placed on the positioning support, the two ends of the battery cover along the length direction are respectively positioned by the positioning bosses, and the mounting holes on the battery cover are arranged corresponding to the receiving tables of the positioning support; When a sealing ring needs to be mounted, the receiving table is driven to rise and protrude from the surface of the positioning boss by operating the lifting driving structure; The sealing ring is sleeved on the receiving table, and the receiving table is driven to descend by the lifting driving structure to coaxially embed the sealing ring into the mounting hole of the battery cover, thereby realizing the assembly of the sealing ring. ​

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