A battery-forming conductive structure

Abstract

This invention relates to the field of lithium battery formation technology and discloses a conductive structure for battery formation, including a lithium battery formation apparatus. The apparatus includes a lithium battery placement base, an equipment frame above the base, and a conductive formation equipment assembly fixedly mounted at the bottom of the frame. Lithium batteries are placed inside the base, and the bottom of the conductive formation equipment assembly contacts the top of the lithium batteries. A cylinder is fixedly mounted in the middle of the top of the frame. The conductive formation equipment assembly consists of multiple conductive formation mechanisms. This conductive structure uses an adjustable stroke cylinder to precisely control the contact between the battery and the copper strip, greatly improving the contact rate and the equipment's yield rate. Furthermore, when the battery model changes, only the cylinder stroke needs to be adjusted to the appropriate position for formation, allowing the equipment to meet the formation needs of various battery models and improving its performance.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery formation, in particular to a battery formation conductive structure. Background Art

[0002] In the current lithium battery industry, all manufacturers have strict requirements on the formation process in order to improve battery performance and production efficiency. The current formation technology on the market has the following problems:

[0003] 1. Before formation, the battery is manually placed on a fixture with a silicone pad, and then the fixture with the battery is placed on the formation station of the formation machine. In the process of contacting the copper bar and pressing down, the elastic deformation of the silicone pad is used to compensate for batteries of different heights on one side (bottom). This bottom compensation is not enough to ensure that all batteries have good contact with the copper bar, and problems such as leakage and low voltage will still occur, thereby reducing the battery formation qualification rate. In addition, the silicone pad at the bottom of the fixture will be damaged and deformed after long-term use, resulting in a gradual decrease in the compensation effect or even failure. When the silicone pad is replaced due to damage, the battery fixture needs to be disassembled and the silicone pad removed, which greatly occupies manpower and production resources and affects production efficiency.

[0004] 2. When the copper strip is in contact with the electrode during the formation process, oxidation will occur due to the conduction, which will reduce the conductivity of the copper strip, resulting in a long charging time and a lower qualified rate. In the prior art, the copper strip oxidation problem is generally solved by grinding. As the copper strip is frequently polished, the copper strip will

[0005] The copper strips are constantly worn out and gradually lose their effectiveness, and eventually the entire structure needs to be dismantled to replace the worn copper strips. During the entire process, a lot of human resources and production time are wasted.

[0006] 3. The existing formation structure generally uses a fixed-stroke cylinder to control the lifting of the copper strip. The fixed-stroke cylinder cannot be adjusted according to the actual battery position. In actual production, there will be problems such as excessive pressure to cause short circuit or insufficient pressure to cause poor contact. In addition, the fixed-stroke cylinder can only be used for batteries of one height model. When the battery height model changes, the cylinder or structure needs to be replaced for normal use, which has too many limitations.

[0007] In order to solve the above technical problems, the present invention provides a battery formation conductive structure. Summary of the invention

[0008] In view of the shortcomings of the prior art, the present invention provides a battery-formed conductive structure to solve the problems raised by the above-mentioned background technology.

[0009] The present invention provides the following technical scheme: a battery formation conductive structure, comprising a lithium battery formation device, the lithium battery formation device comprising a lithium battery placement base, an equipment frame is arranged above the lithium battery placement base, a formation conductive equipment group is fixedly installed at the bottom of the equipment frame, lithium batteries are placed inside the lithium battery placement base, the bottom of the formation conductive equipment group is in contact with the top of the lithium battery, a cylinder is fixedly installed in the middle of the top of the equipment frame, the formation conductive equipment group is composed of a plurality of formation conductive mechanisms, the formation conductive mechanism is composed of a contact copper strip, a sealing strip, a conductive copper strip, a conductive block, a butterfly bolt, an upper sealing block, left and right sealing blocks, a quick-insert elbow joint, an air guide tube and a lower sealing block, the bottom of the contact copper strip is tightly assembled with the top of the sealing strip, and the conductive copper strip is assembled at the bottom of the sealing strip. The ports at the bending points of both ends of the conductive copper strip pass through the fixing holes at both ends of the contact copper strip. There are two butterfly bolts, which are located on both sides of the contact copper strip. The butterfly bolts are connected to the contact copper strip, and the contact copper strip fixes the conductive copper strip inside through the butterfly bolts. Conductive blocks are provided on both sides of the sealing strip, and the conductive blocks are tightly assembled with both sides of the sealing strip. The top of the contact copper strip and the bottom of the conductive copper strip are respectively equipped with an upper sealing block and a lower sealing block, and the outer side of the sealing strip is equipped with left and right sealing blocks. An air duct is installed on the top of the contact copper strip, and a quick-plug elbow is connected to the top of the air duct. An equipment column is fixedly installed on the top of the equipment rack, and there are four equipment columns, which are respectively located at the four corners of the top of the equipment rack. The sealing strip is hollow in design and can be filled with gas.

[0010] Preferred.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The battery is formed into a conductive structure. The battery is formed into a conductive structure using an advanced inflatable elastic mechanism to compensate for the error in battery height. The copper bar is a square EPDM sealing strip. The sealing strip is hollow and can be filled with gas. Before formation, the gas source is turned on to allow the EPDM sealing strip to be filled with gas and expand. The cylinder is controlled to press down. When pressed down, the sealing ring produces elastic deformation to compensate for the contact direction of the battery electrodes, thereby increasing the contact rate between the battery positive electrode and the copper bar, thereby improving the equipment qualification rate. This structure does not use silicone pads, which can save time in replacing silicone pads and can also improve production efficiency. Silicone pads are expensive. When producing batteries, silicone pads generally need to be replaced in about a week. Now silicone pads can be omitted, which can greatly save costs.

[0013] 2. The battery is formed into a conductive structure. Through the butterfly bolts and sealing and clamping structures on both sides, the conductive copper strip can be replaced without overall disassembly, saving a lot of time for replacing wearing parts and improving production efficiency. At the same time, the sealing and clamping structure can make the sealing of the sealing strip more stable, which guarantees the performance of the equipment.

[0014] 3. The battery formation conductive structure adopts an adjustable stroke cylinder to accurately control the contact between the battery and the copper bar, which greatly improves the contact rate between the battery and the copper bar, and also improves the qualified rate of the equipment. When the battery model changes, it only needs to adjust the cylinder stroke to the appropriate position to carry out the formation, so that the equipment can meet the formation needs of various types of batteries and improve the performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the lithium battery formation device of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the conductive forming equipment group of the present invention;

[0017] Figure 3 It is a schematic diagram of the structure of the conductive mechanism of the present invention;

[0018] Figure 4 It is an exploded view of the conductive structure of the present invention.

[0019] In the figure: 1. lithium battery formation device; 2. cylinder; 3. lithium battery placement base; 4. equipment frame; 5. lithium battery; 6. formation conductive equipment group; 7. formation conductive mechanism; 7-1. contact copper strip; 7-2. sealing strip; 7-3. conductive copper strip; 7-4. conductive block; 7-5. butterfly bolt; 7-6. upper sealing block; 7-7. left and right sealing blocks; 7-8. quick-plug elbow joint; 7-9. air guide pipe; 7-10. lower sealing block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-4A battery formation conductive structure includes a lithium battery formation device 1, the lithium battery formation device 1 includes a lithium battery placement base 3, an equipment frame 4 is arranged above the lithium battery placement base 3, an equipment column is fixedly installed on the top of the equipment frame 4, and the number of equipment columns is four, and the four equipment columns are respectively located at the four corners of the top of the equipment frame 4, and a formation conductive equipment group 6 is fixedly installed at the bottom of the equipment frame 4, and a lithium battery 5 is placed inside the lithium battery placement base 3, and the bottom of the formation conductive equipment group 6 is in contact with the top of the lithium battery 5. A cylinder 2 is fixedly installed in the middle of the top of the equipment frame 4, and an adjustable stroke cylinder 2 is used to accurately control the contact between the lithium battery 5 and the conductive copper strip 7-3, which greatly improves the contact between the lithium battery 5 and the conductive copper strip The contact rate of 7-3 also improves the qualified rate of the equipment, and when the model of the lithium battery 5 changes, it only needs to adjust the stroke of the cylinder 2 to the appropriate position to carry out the formation, so that the equipment can meet the formation needs of various models of lithium batteries 5, and improve the performance of the equipment. The formation conductive equipment group 6 is composed of multiple formation conductive mechanisms 7, and the formation conductive mechanism 7 is composed of a contact copper strip 7-1, a sealing strip 7-2, a conductive copper strip 7-3, a conductive block 7-4, a butterfly bolt 7-5, an upper sealing block 7-6, left and right sealing blocks 7-7, a quick-insert elbow joint 7-8, an air guide tube 7-9 and a lower sealing block 7-10. The bottom of the contact copper strip 7-1 is tightly assembled with the top of the sealing strip 7-2, and the conductive copper strip 7-3 is assembled on the sealing strip 7 -2, and the ports at the bent ends of the conductive copper strip 7-3 pass through the fixing holes at the two ends of the contact copper strip 7-1. There are two butterfly bolts 7-5, which are located on both sides of the contact copper strip 7-1. The butterfly bolts 7-5 are connected to the contact copper strip 7-1. The contact copper strip 7-1 fixes the conductive copper strip 7-3 inside through the butterfly bolts 7-5. The conductive copper strip 7-3 can be replaced without disassembling the whole body through the butterfly bolts 7-5 and the sealing clamping structure on both sides, which saves a lot of disassembly and assembly time for replacing wearing parts and improves production efficiency. At the same time, the sealing clamping structure can make the sealing of the sealing strip 7-2 more stable, which has a guarantee effect on the performance of the equipment. The sealing strip 7-2 is provided with Conductive block 7-4, conductive block 7-4 and both sides of sealing strip 7-2 are tightly assembled, upper sealing block 7-6 and lower sealing block 7-10 are respectively assembled on the top of contact copper strip 7-1 and the bottom of conductive copper strip 7-3, left and right sealing blocks 7-7 are assembled on the outer side of sealing strip 7-2, air guide tube 7-9 is installed on the top of contact copper strip 7-1, and quick-plug elbow joint 7-8 is connected to the top of air guide tube 7-9, battery formation conductive mechanism 7 adopts advanced inflation elastic mechanism to compensate for the error of battery height, square EPDM sealing strip 7-2 is on the conductive copper strip 7-3, sealing strip 7-2 is hollow design, gas can be filled inside, before formation, open the gas source to let the inside of EPDM sealing strip 7-2 be filled with gas and expand;Control cylinder 2 to press down. When pressing down, the sealing ring produces elastic deformation to compensate for the contact direction of the battery electrode, which improves the contact rate between the positive electrode of the battery and the copper bar, thereby improving the qualified rate of the equipment. This structure does not use silicone pads, which can save time for replacing silicone pads and improve production efficiency. Silicone pads are expensive. When producing batteries, silicone pads generally need to be replaced in about a week. Now silicone pads can be omitted, which can greatly save costs. ;

[0022] Working principle: 1. When using for the first time, place the lithium batteries 5 in the lithium battery placement stand 3 in a row. After placing the lithium battery placement stand 3, adjust the contact copper strip 7-1 according to the positive position of the lithium battery 5 in the stand. The standard is that the conductive copper strip 7-3 on the EPDM sealing strip 7-2 is aligned with the positive electrode. Turn on the gas source and adjust the air pressure to a suitable size. The gas enters the sealing strip 7-2 from the quick-insert elbow 7-8 to expand and deform the sealing strip 7-2. Then lower the cylinder 2 to allow the conductive copper strip 7-3 to contact with all the positive electrodes of the lithium batteries 5 and adjust to the best contact position.

[0023] After completing the above operations, turn on the power of the formation equipment, control the cylinder 2 to lower the copper bar to the set height through the hand valve, turn on the formation power switch, and run the formation program;

[0024] The operating cylinder 2 presses down the 7-3 conductive copper strip to contact the positive electrode of the lithium battery 5, cooperates with the inflation elastic mechanism for compensation, and then uses a constant current power supply to form the lithium battery 5.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery formation conductive structure, comprising a lithium battery formation device (1), characterized in that: The lithium battery formation device (1) comprises a lithium battery placement base (3), an equipment frame (4) is arranged above the lithium battery placement base (3), a formation conductive equipment group (6) is fixedly installed at the bottom of the equipment frame (4), lithium batteries (5) are placed inside the lithium battery placement base (3), the bottom of the formation conductive equipment group (6) is in contact with the top of the lithium battery (5), a cylinder (2) is fixedly installed in the middle of the top of the equipment frame (4), the formation conductive equipment group (6) is composed of a plurality of formation conductive mechanisms (7), and the formation conductive mechanism (7) is a conductive mechanism. The electrical mechanism (7) is composed of a contact copper strip (7-1), a sealing strip (7-2), a conductive copper strip (7-3), a conductive block (7-4), a butterfly bolt (7-5), an upper sealing block (7-6), left and right sealing blocks (7-7), a quick-plug elbow joint (7-8), an air guide tube (7-9) and a lower sealing block (7-10). The bottom of the contact copper strip (7-1) is tightly assembled with the top of the sealing strip (7-2), the conductive copper strip (7-3) is assembled on the bottom of the sealing strip (7-2), and the ports at the bent ends of the conductive copper strip (7-3) pass through the contact copper strip. The sealing strip (7-2) has fixing holes at both ends of the sealing strip (7-1), the number of the butterfly bolts (7-5) is two, the two butterfly bolts (7-5) are located on both sides of the contact copper strip (7-1), the butterfly bolts (7-5) are connected to the contact copper strip (7-1), the contact copper strip (7-1) fixes the internal conductive copper strip (7-3) through the butterfly bolts (7-5), the two sides of the sealing strip (7-2) are provided with conductive blocks (7-4), the conductive blocks (7-4) are tightly assembled with the two sides of the sealing strip (7-2), the top of the contact copper strip (7-1) and the conductive copper strip The bottom of the equipment rack (7-3) is respectively equipped with an upper sealing block (7-6) and a lower sealing block (7-10), the outer side of the sealing strip (7-2) is equipped with left and right sealing blocks (7-7), the top of the contact copper strip (7-1) is equipped with an air guide tube (7-9), and the top of the air guide tube (7-9) is connected to a quick-plug elbow joint (7-8), the top of the equipment rack (4) is fixedly equipped with equipment columns, and the number of equipment columns is four, and the four equipment columns are respectively located at the four corners of the top of the equipment rack (4), and the sealing strip (7-2) is hollow in design and can be filled with gas.

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