CN217484010U

CN217484010U - Lithium cellization becomes and ageing tests pressurization anchor clamps

Info

Publication number: CN217484010U
Application number: CN202221006584.XU
Authority: CN
Inventors: 程乾龙; 薛历兴; 张阔; 岳治崇; 梁永吉
Original assignee: Cornex New Energy Co ltd
Current assignee: Cornex New Energy Co ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-09-23
Anticipated expiration: 2032-04-24

Abstract

The utility model provides a lithium cellization becomes and aging test pressurization anchor clamps belongs to lithium cell manufacturing and test equipment technical field. The compression clamp includes a table and a clamping assembly. The worktable is provided with a mounting surface. The clamping assembly comprises a base, an adjusting screw, a sliding block and a plurality of cushion blocks. The base is detachably connected to the mounting surface, the base is provided with a sliding rail, the end faces of two sides of the base are provided with first guide grooves parallel to the sliding rail, and two ends of the sliding rail are provided with a first boss and a second boss. The first boss is provided with an adjusting screw hole, the sliding block is slidably arranged on the sliding rail, two sides of the sliding block are provided with lugs protruding out of the mounting surface, and one side end surface of each lug facing the sliding rail is provided with a first limiting lug inserted in the first guide groove. The adjusting screw rod is arranged in the adjusting screw hole in a penetrating mode, and one end of the adjusting screw rod is abutted to the sliding block. Adopt this pressurization anchor clamps can provide even pressure for the lithium cell group who carries out formation and aging test, improve experimental effect when guaranteeing test efficiency.

Description

Lithium cellization becomes and ageing tests pressurization anchor clamps

Technical Field

The utility model relates to a lithium cell manufacturing and test equipment technical field, in particular to lithium cellization becomes and aging test pressurization anchor clamps.

Background

In the formation process of the lithium battery, the electrolyte chemically reacts on the surface of the negative electrode to form a layer of solid electrolyte interface film (SEI film), the SEI film has a good protection effect on the negative electrode, and the performance of the battery is determined by the quality of the formation effect. Research shows that the joint degree of the positive and negative pole pieces and the diaphragm has great influence on the interface forming of the SEI film, and the positive and negative pole pieces and the diaphragm in the battery need to keep constant pressure in the forming and aging processes of the lithium battery pack in the activation stage, so that an external clamp or pressure equipment is used for applying pressure to the battery in the forming and aging processes.

In the correlation technique, when carrying out the formation and the ageing tests of lithium cell group, in order to simulate the operating mode that lithium cell group applyed pressure to the battery at actual activation in-process, be in simultaneously and consider experimental research and development cost, generally adopt to set up the gasket in the both sides of lithium cell to utilize the form of binder clip centre gripping gasket to reach the effect of applying pressure to the battery.

For a small quantity of pressure equipment special for lithium battery purchase for research and development tests, the cost of the research and development tests is high. And adopt the mode of binder clip centre gripping gasket to exert pressure to the battery, though can satisfy the pressure feed to the lithium cell basically in order to realize improving the effect of laminating degree between the pole piece, the area of contact between binder clip and the gasket is less, and the pressure feed to the battery between gasket and the gasket is not even enough, need take off repeatedly at experimental in-process and adjust with the centre gripping, leads to experimental effect not good and test efficiency low.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a lithium cellization becomes and ageing test pressurization anchor clamps, simple structure convenient operation can provide even pressure for the lithium cell group that makes up and ageing test, improves experimental effect when guaranteeing test efficiency. The technical scheme is as follows:

the embodiment of the utility model provides a lithium cellization becomes and aging test pressurization anchor clamps, include:

the workbench is provided with a mounting surface;

the clamping assembly comprises a base, an adjusting screw rod, a sliding block and a plurality of cushion blocks, wherein the base is detachably connected to the mounting surface, a sliding rail parallel to the mounting surface is arranged on the base, first guide grooves are formed in end surfaces of two sides of the sliding rail on the base and parallel to the sliding rail, a first boss and a second boss which are arranged in a protruding mode in a direction perpendicular to the mounting surface are arranged at two ends of the sliding rail, an adjusting screw hole is formed in the first boss, the sliding block is slidably mounted on the sliding rail, lugs protruding towards the mounting surface are arranged on two sides of the sliding block, a first limiting lug is arranged on one side end surface of the lug facing the sliding rail and slidably inserted into the first guide groove, the adjusting screw rod is arranged in the adjusting screw hole in a penetrating mode, and one end of the adjusting screw rod is abutted to the sliding block, the plurality of cushion blocks are sequentially arranged between the sliding block and the second boss along the length direction of the sliding rail.

Optionally, the slide rail is provided with scale marks on an end face of at least one side in the length direction.

Optionally, the slide rail is provided with a second guide groove, the second guide groove is arranged along the length direction of the slide rail, and the cushion block is provided with a second limiting projection, and the second limiting projection is slidably mounted in the second guide groove.

Optionally, the base has two first bolt holes, one of the first bolt holes is located on a side of the first boss facing away from the slide rail, the other of the first bolt holes is located on a side of the second boss facing away from the slide rail, and the mounting surface has a second bolt hole matching with the two first bolt holes.

Optionally, the workbench comprises a top plate, a bottom plate and a plurality of vertical columns connected between the top plate and the bottom plate, the mounting surface is located on the top plate, and the second bolt hole penetrates through the top plate.

Optionally, the mounting surface has a mounting groove matching with an outer contour of the base, and the second bolt hole is located in the mounting groove.

Optionally, the mounting groove is communicated with an end face of one side of the top plate.

Optionally, the workbench, the base and the slider are all metal pieces with surfaces subjected to insulation treatment.

Optionally, the cushion block is a metal piece or a plastic structural piece with an insulated surface.

The embodiment of the utility model provides a beneficial effect that technical scheme brought includes at least:

before lithium cell formation and aging tests are required. The base of the clamping component can be fixedly arranged on the installation surface of the workbench. And a plurality of cushion blocks are sequentially arranged between the sliding block and the second boss along the length direction of the sliding rail. And then a plurality of soft package batteries forming the battery pack are placed on the slide rail of the clamping assembly, and two adjacent soft package batteries are separated by the cushion block. And then the end part of the adjusting screw pushes the sliding block abutted against the adjusting screw to move towards the second boss by screwing the adjusting screw. The sliding block can push the cushion blocks and the soft package battery clamped between the cushion blocks to be tightened to the second boss in the sliding process. When adjusting screw advanced can not twist the position, slider and second boss can realize the centre gripping fixed to a plurality of cushions and the laminate polymer battery that lie in between the two, and every two adjacent cushion homoenergetic simultaneously form pressure to the laminate polymer battery that presss from both sides between the two. The base can be detached and separated from the workbench, and the clamping assembly and the soft package batteries are placed together to be formed on the forming clamp or are placed into a high-temperature box for aging.

Adopt the utility model provides a pressurization anchor clamps. The slider is at the in-process that the slide rail removed under adjusting screw's promotion, and first spacing lug on its both ends lug moves in first guide way in step, and the cooperation structure of first spacing lug and first guide way can carry out spacing direction to the removal route of slider, guarantees that its route can not appear squinting for the slide rail, and then makes a plurality of cushions that it promoted also all provide pressure to laminate polymer battery along unanimous direction. According to the transmission characteristic of power, the pressure that is provided by the slider can evenly transmit for a plurality of laminate polymer battery through a plurality of cushions, can provide even pressure to a plurality of laminate polymer battery simultaneously through twisting adjusting screw, and simple structure and convenient operation improve experimental effect when guaranteeing test efficiency.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic perspective view of a lithium battery formation and aging test pressing fixture provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a workbench according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a clamping assembly according to an embodiment of the present invention in a non-operating state;

fig. 4 is a schematic structural diagram of a slider according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a cushion block provided in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of the clamping assembly according to the embodiment of the present invention in an operating state.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

In the correlation technique, when carrying out the formation and the aging test of lithium cell group, in order to simulate the operating mode that lithium cell group applyed pressure to the battery at actual activation in-process, be in simultaneously and consider experimental research and development cost, adopt to set up the gasket in the both sides of lithium cell usually to the form that utilizes the binder clip to press from both sides the gasket reaches the effect of applying pressure to the battery.

Fig. 1 is a schematic perspective view of a lithium battery formation and aging test pressurization fixture provided by an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a workbench according to an embodiment of the present invention. Fig. 3 is a schematic structural diagram of the clamping assembly according to an embodiment of the present invention in a non-operating state. Fig. 4 is a schematic structural diagram of a slider according to an embodiment of the present invention. Fig. 5 is a schematic structural diagram of a cushion block according to an embodiment of the present invention. Fig. 6 is a schematic structural diagram of the clamping assembly according to the embodiment of the present invention in an operating state. As shown in fig. 1 to 6, by practice, the applicant provides a lithium battery formation and aging test pressurization fixture, which comprises a workbench 1 and a clamping assembly 2.

The table 1 has a mounting surface 1 a. The clamping assembly 2 includes a base 21, an adjustment screw 22, a slider 23, and a plurality of spacers 24. The base 21 is detachably connected to the mounting surface 1a, the base 21 is provided with a sliding rail 211 parallel to the mounting surface 1a, the base 21 is provided with first guide grooves 212 on end surfaces at two sides of the sliding rail 211, and the first guide grooves 212 are parallel to the sliding rail 211. Both ends of the slide rail 211 have a first boss 213 and a second boss 214 arranged to project in a direction perpendicular to the mounting surface 1a, and the first boss 213 has an adjustment screw hole 2131 thereon. The sliding block 23 is slidably mounted on the sliding rail 211, two sides of the sliding block 23 are provided with lugs 231 protruding toward the mounting surface 1a, one end surface of the lug 231 facing the sliding rail 211 is provided with a first limit lug 2311, and the first limit lug 2311 is slidably inserted into the first guide groove 212. The adjusting screw 22 is inserted into the adjusting screw hole 2131, and one end of the adjusting screw abuts against the sliding block 23, and the plurality of cushion blocks 24 are sequentially arranged between the sliding block 23 and the second boss 214 along the length direction of the sliding rail 211.

In the embodiment of the present invention, before the lithium battery formation and aging test are performed. The base 21 of the clamping unit 2 may be first fixedly mounted on the mounting surface 1a of the table 1. The plurality of spacers 24 are sequentially disposed between the slider 23 and the second boss 214 along the length direction of the slide rail 211. And then a plurality of soft package batteries m forming the battery pack are placed on the sliding rail 211 of the clamping component 2, and every two adjacent soft package batteries m are separated by the cushion block 24. Then, by screwing the adjusting screw 22, the end of the adjusting screw 22 pushes the slider 23 in contact therewith to move toward the second boss 214. The sliding block 23 pushes the plurality of spacers 24 and the pouch battery m clamped between the spacers 24 to tighten toward the second protrusion 214 during the sliding process. When the adjusting screw 22 is pushed to the position where the adjusting screw cannot be screwed, the sliding block 23 and the second boss 214 can clamp and fix the plurality of cushion blocks 24 and the soft-package battery m between the two, and meanwhile, every two adjacent cushion blocks 24 can form pressure on the soft-package battery m between the two. Afterwards can be with the separation of dismantling on base 21 by workstation 1, with clamping component 2 and a plurality of laminate polymer battery m together place to become to press from both sides and go on becoming or put into the high-temperature chamber and age.

Adopt the utility model provides a pressurization anchor clamps. In the process that the sliding block 23 moves along the sliding rail 211 under the pushing of the adjusting screw 22, the first limiting convex blocks 2311 on the convex lugs 231 at the two ends of the sliding block move synchronously in the first guide grooves 212, and the matching structures of the first limiting convex blocks 2311 and the first guide grooves 212 can limit and guide the moving path of the sliding block 23, so that the path can not deviate relative to the sliding rail 211, and then the plurality of cushion blocks 24 pushed by the sliding block can provide pressure for the soft package battery m along the same direction. According to the transmission characteristic of power, the pressure that is provided by slider 23 can evenly transmit for a plurality of laminate polymer battery m through a plurality of cushion 24, can provide even pressure to a plurality of laminate polymer battery m simultaneously through twisting adjusting screw 22, and simple structure and convenient operation improve experimental effect when guaranteeing test efficiency.

Optionally, the slide rail 211 is provided with a scale mark 215 on an end surface of at least one side in the length direction. For example, in the embodiment of the present invention, the tightening degree of the adjusting screw 22 is often required to be changed according to the number of the pouch batteries m clamped on the pressing jig or the test requirements. By providing a scale 215 with an accuracy of 1mm on the side end face of the slide rail 211. When the adjusting screw 22 is screwed to push the slider 23 to move, the relative position of the slider 23 and the scale mark 215 can be observed to realize accurate adjustment of the pressure. When the soft package batteries m with the same number are tested for multiple times, the consistency of pressure applied at each time can be ensured, and the pressurizing precision and the test effect of the pressurizing clamp are improved.

Optionally, the sliding rail 211 has a second guiding groove 216, the second guiding groove 216 is disposed along the length direction of the sliding rail 211, and the cushion block 24 has a second limiting protrusion 241, and the second limiting protrusion 241 is slidably installed in the second guiding groove 216. Illustratively, in the embodiment of the present invention, through set up the second guide way 216 on slide rail 211 and cooperate with the spacing lug 241 of second on the cushion 24, can remove and carry out further spacing direction to the removal route of cushion 24 when extrudeing after cushion 24 receives the thrust of slider 23, make its route can not appear squinting for slide rail 211, further improve the uniformity to the laminate polymer battery m transmission pressure that it gripped, guarantee the pressurization precision and the experimental effect of pressurization anchor clamps.

Optionally, the base 21 has two first bolt holes 217, one of the first bolt holes 217 is located on a side of the first boss 213 facing away from the slide rail 211, the other first bolt hole 217 is located on a side of the second boss 214 facing away from the slide rail 211, and the mounting surface 1a has a second bolt hole 11 matching with the two first bolt holes 217. Exemplarily, in the embodiment of the present invention, the base 21 is bolted to the workbench 1 through the first bolt hole 217 and the second bolt hole 11, and the structure is simple, the structure is tight, the assembly and disassembly are convenient, and the test efficiency can be effectively improved.

Alternatively, the table 1 includes a top plate 1b, a bottom plate 1c, and a plurality of columns 1d connected between the top plate 1b and the bottom plate 1c, the mounting surface 1a is located on the top plate 1b, and the second bolt holes 11 penetrate through the top plate 1 b. Exemplarily, in the embodiment of the present invention, the support structure of the middle hollow-out portion formed by the top plate 1b, the bottom plate 1c and the plurality of columns 1d is configured to the working platform 1, so that the material usage and the production cost of the whole pressing fixture can be effectively reduced. Meanwhile, when the base 21 and the table 1 are fixedly connected, since the adjusting screw hole 2131 is connected and provided above one end of the base 21 close to the first boss 213, there is a possibility that the fixing is difficult to be performed by inserting a screw into the first bolt hole 217 from above the base 21. At this time, the screw is screwed into the second bolt hole 11 through the space below the top plate 1b, and the screw is fixedly connected to the second bolt hole 11 and the first bolt hole 217 in this order from the opposite direction. Make things convenient for the experimenter to carry out the dismouting operation, further improved test efficiency.

Optionally, the mounting surface 1a has a mounting groove 12 thereon, the mounting groove 12 matches the outer contour of the base 21, and the second bolt hole 11 is located in the mounting groove 12. For example, in the embodiment of the present invention, by providing the mounting groove 12 on the mounting surface 1a, the tester can align the base 21 with the mounting groove 12 and then perform corresponding mounting. Guarantee base 21 after installing mounting groove 12, the second bolt hole 11 that first bolt hole 217 on base 21 can be accurate and in mounting groove 12 aligns, makes things convenient for testing personnel to carry out quick fixed connection, has further improved efficiency of software testing.

Alternatively, the mounting groove 12 communicates with an end face of one side of the top plate 1 b. Exemplarily, in the embodiment of the present invention, after the clamping of the clamping assembly 2 to the plurality of pouch batteries m is completed and the bolt connection between the base 21 and the workbench 1 is released. Can follow the length direction of slide rail 211 with whole centre gripping subassembly 2 along the horizontal direction by a side roll-off and the separation of roof 1b, make things convenient for the testing personnel to grip and take out from mounting groove 12, further improve test efficiency.

Alternatively, the table 1, the base 21 and the slider 23 are all metal members with surfaces subjected to insulation treatment. The cushion block 24 is a metal or plastic structural member with an insulated surface. Exemplarily, in the embodiment of the present invention, for each part in the worktable 1 and the clamping assembly 2, the metal member after insulation treatment is adopted to improve the overall practical life of the pressing fixture on the basis of ensuring the safety of personnel. For the cushion block 24 which only plays a role in clamping and conducting pressure to the soft package battery m, the plastic structural member is adopted, so that the material cost can be further reduced while the test effect is achieved.

Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item appearing in front of the word "comprising" or "comprises" includes the element or item listed after the word "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.

The above description is only an optional embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a lithium cellization becomes and ageing tests pressurization anchor clamps which characterized in that includes:

a table (1), wherein the table (1) is provided with a mounting surface (1 a);

the clamping assembly (2) comprises a base (21), an adjusting screw rod (22), a sliding block (23) and a plurality of cushion blocks (24), wherein the base (21) is detachably connected to the mounting surface (1a), a sliding rail (211) parallel to the mounting surface (1a) is arranged on the base (21), a first guide groove (212) is formed in the end surface of the base (21) on two sides of the sliding rail (211), the first guide groove (212) is parallel to the sliding rail (211), a first boss (213) and a second boss (214) which are arranged in a protruding mode in the direction perpendicular to the mounting surface (1a) are arranged at two ends of the sliding rail (211), an adjusting screw hole (2131) is formed in the first boss (213), the sliding block (23) is installed on the sliding rail (211) in a sliding mode, lugs (231) protruding towards the mounting surface (1a) are arranged on two sides of the sliding block (23), the end face, facing the sliding rail (211), of one side of the lug (231) is provided with a first limiting convex block (2311), the first limiting convex block (2311) is slidably inserted into the first guide groove (212), the adjusting screw rod (22) is arranged in the adjusting screw hole (2131) in a penetrating mode, one end of the adjusting screw rod is abutted to the sliding block (23), and the plurality of cushion blocks (24) are sequentially arranged between the sliding block (23) and the second boss (214) along the length direction of the sliding rail (211).

2. The lithium battery formation and aging test pressing jig as claimed in claim 1, wherein the slide rail (211) is provided with scale marks (215) on an end surface of at least one side in a length direction.

3. The lithium battery formation and aging test pressurization fixture according to claim 1, characterized in that the slide rail (211) is provided with a second guide groove (216), the second guide groove (216) is arranged along the length direction of the slide rail (211), the cushion block (24) is provided with a second limit projection (241), and the second limit projection (241) is slidably installed in the second guide groove (216).

4. The lithium battery formation and aging test pressurization fixture according to claim 1, characterized in that, the base (21) is provided with two first bolt holes (217), wherein one of the first bolt holes (217) is located on a side of the first boss (213) facing away from the slide rail (211), wherein the other first bolt hole (217) is located on a side of the second boss (214) facing away from the slide rail (211), and the mounting surface (1a) is provided with a second bolt hole (11) matching with the two first bolt holes (217).

5. The lithium cellization and aging test pressurization fixture according to claim 4, characterized in that, the working table (1) comprises a top plate (1b), a bottom plate (1c) and a plurality of upright posts (1d) connected between the top plate (1b) and the bottom plate (1c), the mounting surface (1a) is located on the top plate (1b), and the second bolt holes (11) penetrate through the top plate (1 b).

6. The lithium battery formation and aging test pressurization fixture according to claim 5, characterized in that, the mounting surface (1a) is provided with a mounting groove (12), the mounting groove (12) matches with the outer contour of the base (21), and the second bolt hole (11) is positioned in the mounting groove (12).

7. The pressure clamp for lithium battery formation and aging test as set forth in claim 6, wherein the mounting groove (12) communicates with an end surface of one side of the top plate (1 b).

8. The pressure clamp for lithium battery formation and aging test according to any one of claims 1 to 7, wherein the work table (1), the base (21) and the slide block (23) are all metal pieces with surfaces subjected to insulation treatment.

9. The pressure clamp for the lithium battery formation and aging test as claimed in any one of claims 1 to 7, wherein the cushion block (24) is a metal member or a plastic structural member with an insulated surface.