CN113285111A

CN113285111A - Preparation equipment and method of bending-resistant flexible battery

Info

Publication number: CN113285111A
Application number: CN202110374544.4A
Authority: CN
Inventors: 李贝; 杨跃玺; 张旺
Original assignee: Huzhou Rouchi Xinneng Technology Co ltd
Current assignee: Huzhou Rouchi Xinneng Technology Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-08-20

Abstract

The invention provides a preparation device and a preparation method of a bending-resistant flexible battery, wherein the preparation device comprises an upper die assembly and a lower die assembly, the lower die assembly bears a battery to be shaped, the upper die assembly is arranged above the lower die assembly, and the upper die assembly performs rolling shaping on the battery; the method comprises the steps of firstly, selecting a prefabricated mold, and placing the prefabricated mold on a track bottom mold; step two, feeding the battery; step three, adjusting the distance between the pressing units, and adjusting the distance between the pressing unit A and the pressing unit B according to the positions of the battery and the prefabricated mold; and step four, pressing and shaping, namely applying downward pressure F1 and leftward pushing force F2 to the rigid structural member to enable the pressing unit B to move along the upper surface of the prefabricated mould, and pressing the shape of the battery by the pressing unit A at the moment. The battery with one end fixed is loaded through the forming bottom die, the pressing unit A rolls the battery on the upper surface of the battery, and the shape of the battery is shaped into a corrugated shape matched with the surface of the forming bottom die.

Description

Preparation equipment and method of bending-resistant flexible battery

Technical Field

The invention relates to the technical field of flexible battery production equipment, in particular to preparation equipment and a preparation method of a bending-resistant flexible battery.

Background

The lithium ion battery is the battery with the widest application and the best comprehensive energy storage effect in the current society, and the applied products comprise a mobile phone, a tablet personal computer, an intelligent watch, a Bluetooth headset, a mobile power supply, an emergency power supply, an electric tool, an unmanned aerial vehicle for model airplane, a communication base station, outdoor energy storage, health monitoring, functional clothing and the like. The portable characteristic greatly facilitates the requirements of people on power consumption equipment in production and life.

The main flow application directions of the lithium ion battery mainly include two types, one is a high-capacity energy storage/power type product, and the other is a 3C digital consumption product. Lithium batteries adopted by 3C consumer electronic products mainly have two appearance structures, one is a cylindrical lithium ion battery, and the other is a soft package lithium ion battery. Due to diversified design and multi-space structure adaptability, the soft package type lithium ion battery occupies a main position in a consumer battery at present.

The flexible package lithium ion battery is one of the most common forms of the lithium ion battery, the basic composition units of the flexible package lithium ion battery are an outer package aluminum plastic film and an inner battery cell which is internally prepared by a positive electrode assembly, a negative electrode assembly and an isolation membrane assembly through an assembly process, and an internal ion channel is constructed by electrolyte with lithium ion conductivity injected into the flexible package lithium ion battery, so that the chemical portable battery which can be repeatedly charged and discharged for use is formed.

The appearance structure of soft-packing lithium cell is more fixed, is mostly the cuboid structure, according to the consumer space and different length, width and the thickness of different designs. Common mobile phones and tablet computers are classified into the category. The battery core is packaged by adopting a lighter aluminum-plastic composite film, the addition amount of electrolyte is effectively controlled, and the high utilization rate of space is realized. The energy density is more than three times of that of the lead-acid storage battery.

In the manufacturing process of the soft package type lithium ion battery, the migration distance of lithium ions is shortened by the close fit of the anode and the cathode, the inside of the battery is generally in a negative pressure state, and the battery body feels hard. The requirement on the hardness in production is a key control index of the lithium battery. Therefore, the lithium battery in general cannot be bent, twisted, and stretched.

Wearable intelligent electronic equipment is hot in recent market, and the product kind uses intelligent wrist-watch, intelligent bracelet, bluetooth headset etc. as leading, and the battery system of its adoption is mostly soft-packing lithium cell. The requirements for the exquisite design and multifunction of the product place higher demands on the capacity and energy density of the battery. However, on the premise that the energy density of the lithium battery reaches the material performance of the ceiling, it is difficult to greatly improve the battery capacity of the electronic product through the improvement of the material performance.

Meanwhile, the development of the flexible electronic industry has been provided with rudiments domestically, and scientific and technological products such as flexible screens and flexible circuits indicate a new direction for the development of wearable intelligent electronics. Future industries such as intelligent wearing, intelligent clothes and the like can better meet the wearing comfort requirement of the human body and better accord with the engineering design of the human body. A technological innovation is also needed for batteries as an energy source for intelligent wearable electronic devices.

The patent application No. 201580062212.5 discloses providing a flexible battery. A flexible battery according to an exemplary embodiment of the present invention includes an electrode assembly, and an exterior member that encloses the electrode assembly together with an electrolyte, wherein at least one face of the exterior member includes a first pattern portion and a second pattern portion for contracting and expanding when bent, the first pattern portion and the second pattern portion having mutually different patterns.

However, in the prior art solution, there are the following technical problems: 1. the extrusion molding of the die causes the stress generated inside the battery to cause the fracture of the electric conductor; 2. the external film of the battery is damaged by extrusion, so that the battery fails.

Disclosure of Invention

Aiming at the problems, the invention provides a preparation device of a bending-resistant flexible battery, which is characterized in that a forming bottom die is arranged to bear a battery with one fixed end, and a pressing unit A is used for rolling the upper surface of the battery, so that the shape of the battery is shaped into a corrugated shape matched with the surface of the forming bottom die, and the technical problems that in the prior art, the inner part of the battery generates stress to cause conductor fracture and the outer film of the battery is damaged due to extrusion to cause battery failure caused by die extrusion forming are solved.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a preparation equipment of flexible battery of resistant type that bends, its characterized in that includes mould subassembly and lower mould subassembly, the battery of waiting the plastic is born to the lower mould subassembly, go up the mould subassembly set up in the top of lower mould subassembly, should go up the mould subassembly right the battery carries out the roll extrusion plastic.

As an improvement, the lower die assembly comprises a base, a fixture arranged on the base and a forming bottom die which is detachable from the base, the forming bottom die is arranged on one side of the fixture, the battery is placed on the forming bottom die, and one end of the battery is clamped by the fixture.

As an improvement, the upper surface of the forming bottom die is provided with corrugated grooves with regular or irregular depths and regular or irregular intervals, and the forming bottom die is made of metal or organic materials, has certain hardness and is insulated on the surface.

As an improvement, the upper die assembly comprises a rigid structural member and a pressing unit a arranged at one end of the rigid structural member, the rigid structural member bears a vertical downward pressure F1 and a horizontal force F2, and the pressing unit a applies acting force to the battery on the forming bottom die to shape the battery.

As an improvement, the lower die assembly further comprises a track bottom die and a prefabricated die, wherein the track bottom die is arranged on the other side of the fixture relative to the forming bottom die, and the prefabricated die is placed on the track bottom die.

As an improvement, the upper die assembly further comprises a pressing unit B, the pressing unit B is arranged on the rigid structural member, the pressing unit B is consistent with the pressing unit a in the height direction, and the pressing unit B is arranged corresponding to the prefabricated die.

As an improvement, the forming bottom die and the track bottom die are arranged in parallel, and the shape of the upper surface of the forming bottom die is consistent with that of the upper surface of the track bottom die.

As an improvement, the pressing unit B and the pressing unit a both comprise a connecting rod and a roller shaft, the roller shaft freely rotates relative to the connecting rod, and the outer diameter of the roller shaft is smaller than the concave inner diameter of the upper surface of the forming bottom die.

As an improvement, the device also comprises a transverse guide rail and a linear bearing, and the two connecting rods are connected to the transverse guide rail through the linear bearing.

The invention also provides a preparation method of the bending-resistant flexible battery, wherein a forming bottom die is arranged to bear the battery with one fixed end, the pressing unit A is used for rolling the upper surface of the battery, the pressing unit B is matched to move along the upper surface of the prefabricated die, so that the shape of the battery is the same as that of the prefabricated die, the free end of the battery has a shrinkage space in the rolling process, the internal stress is eliminated, and the bending-resistant flexible battery is beneficial to processing and forming.

a preparation method of a bending-resistant flexible battery is characterized by comprising the following steps:

selecting a prefabricated mold, selecting the corresponding prefabricated mold according to the shape of a battery to be processed and formed, and placing the prefabricated mold on a track bottom mold;

secondly, feeding the battery, namely clamping one end of the battery to be processed on a clamp, and enabling a main body of the battery to lie on the forming bottom die;

adjusting the distance between the pressing units, namely adjusting the distance between the pressing unit A and the pressing unit B according to the positions of the battery and the prefabricated mold, so that the pressing unit A corresponds to the right end part of the battery and the pressing unit B corresponds to the right end part of the prefabricated mold;

and step four, pressing and shaping, namely applying downward pressure F1 and leftward pushing force F2 to the rigid structural member to enable the pressing unit B to move along the upper surface of the prefabricated mould, and at the moment, pressing the shape of the battery by the pressing unit A to enable the shape of the battery to be identical to that of the prefabricated mould.

The invention has the beneficial effects that:

(1) according to the invention, the forming bottom die is arranged to bear the battery with one fixed end, the pressing unit A is used for rolling on the upper surface of the battery, and the pressing unit B is matched to move along the upper surface of the prefabricated die, so that the shape of the battery is the same as that of the prefabricated die, and the free end of the battery has a shrinkage space in the rolling process, so that the internal stress is eliminated, and the forming is facilitated;

(2) the forming bottom die and the track bottom die matched with the forming bottom die are arranged in the forming device, so that flexible batteries with different shapes are shaped, the structure is simple and reliable, and diversified production of products is facilitated;

(3) according to the invention, the prefabricated mould is arranged to bear the pressure in the vertical direction, so that the stress on the surface of the battery is uniform, and the external coated film and the internal conductor of the battery are protected from being damaged;

(4) according to the invention, the roller shaft is arranged to roll and press against the battery, and the diameter of the roller shaft is smaller than the inner diameter of the recess on the upper surface of the forming bottom die, so that the bending of the battery is smooth, and the bonding degree of the battery and the forming bottom die is good.

In conclusion, the invention has the advantages of stress relief, convenience in replacement, battery protection and the like, and is particularly suitable for the technical field of flexible battery production equipment.

Drawings

FIG. 1 is an overall elevational schematic view of the present invention;

FIG. 2 is a schematic structural view of an upper die assembly of the present invention;

FIG. 3 is a schematic view of the lower die assembly of the present invention;

FIG. 4 is a partial schematic view of the reshaping operation of the present invention;

FIG. 5 is an enlarged view of the point A in FIG. 4;

FIG. 6 is a schematic view of the preformed mold corresponding to the formation of a battery according to the present invention;

FIG. 7 is a second schematic view of the preformed mold corresponding to the formation of the battery of the present invention;

FIG. 8 is a process flow diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example one

As shown in fig. 1 to 7, a manufacturing apparatus for a bending-resistant flexible battery is characterized by comprising an upper die assembly 1 and a lower die assembly 2, wherein the lower die assembly 2 carries a battery 3 to be shaped, the upper die assembly 1 is arranged above the lower die assembly 2, and the upper die assembly 1 performs roll shaping on the battery 3.

Further, lower mould component 2 includes base 211, sets up anchor clamps 241 on this base 211 and relatively base 211 detachable takes shape die block 221, take shape die block 221 set up in one side of anchor clamps 241, battery 3 places on taking shape die block 221 and this battery 3's one end by anchor clamps 241 centre gripping.

The battery 3 to be processed is placed on the clamp 241 and clamped after being sealed by the coating, the clamp 241 clamps the electrode end of the battery, the welding part of the electrode is protected from being damaged, the other end of the battery is a free end, and the battery has a shrinkage allowance in the process of being pressed and shaped, so that the battery core is prevented from being damaged due to large stress generated by pressing.

Further, the upper surface of the forming bottom mold 221 has corrugated grooves with regular or irregular depths and regular or irregular intervals, and the forming bottom mold 221 is made of a metal material or an organic material, has a certain hardness, and has an insulating surface.

It should be noted that the corrugated groove on the upper surface of the forming bottom mold 221 determines the shape of the battery 3, and the replaceable forming bottom mold 221 facilitates rapid production of batteries 3 with different shapes, which is convenient and fast.

Further, the upper die assembly 1 includes a rigid structural member 131 and a pressing unit a11 disposed at one end of the rigid structural member 131, the rigid structural member 131 receives a vertical downward pressure F1 and a horizontal force F2, and the pressing unit a11 applies a force to the battery 3 on the forming bottom die 221 to shape the battery.

Further, the lower die assembly 2 further includes a track bottom die 222 and a prefabricated die 231, the track bottom die 222 is disposed on the other side of the fixture 241 relative to the forming bottom die 221, and the prefabricated die 231 is disposed on the track bottom die 222.

Further, the upper mold assembly 1 further includes a pressing unit B12, the pressing unit B12 is disposed on the rigid structural member 131, the pressing unit B12 is aligned with the pressing unit a11 in the height direction, and the pressing unit B12 is disposed corresponding to the prefabricated mold 231.

It should be noted that the prefabricated mold 231 is used for bearing the pressure transmitted from the rigid structural member 131 to the pressing unit B12, so that the pressure received by the battery 3 to the pressing unit a11 is uniform and stable, and a large pressing force cannot be generated to press the battery 3, thereby protecting the battery.

Further, the forming bottom die 221 and the track bottom die 222 are arranged in parallel, and the upper surface of the forming bottom die 221 and the upper surface of the track bottom die 222 keep the same shape.

Further, each of the pressing unit B12 and the pressing unit a11 includes a link 111 and a roller 113, the roller 113 freely rotates relative to the link 111, and an outer diameter of the roller 113 is smaller than a concave inner diameter of the upper surface of the forming die 221.

The roller shaft is pressed against the battery in a rolling manner, and the diameter of the roller shaft is smaller than the inner diameter of the recess on the upper surface of the forming bottom die, so that the battery is smoothly bent, and the adhesion degree of the battery and the forming bottom die is good.

Further, the device also comprises a transverse guide rail 121 and a linear bearing 112, and both the connecting rods 111 are connected to the transverse guide rail 121 through the linear bearing 112.

Example two

As shown in fig. 8, a method for manufacturing a bending-resistant flexible battery is characterized by comprising the following steps:

step one, selecting a prefabricated mold, selecting a corresponding prefabricated mold 231 according to the shape of the battery 3 to be processed and formed, and placing the prefabricated mold 231 on the track bottom mold 222;

step two, charging the battery, namely clamping one end of the battery 3 to be processed on a clamp 241, and enabling the main body of the battery 3 to lie on a forming bottom die 221;

adjusting the distance between the pressing units, namely adjusting the distance between the pressing unit A11 and the pressing unit B12 according to the positions of the battery 3 and the prefabricated mold 231, so that the pressing unit A11 corresponds to the right end part of the battery 3, and the pressing unit B12 corresponds to the right end part of the prefabricated mold 231;

step four, pressing and shaping, namely applying a downward pressure F1 and a leftward pushing force F2 to the rigid structural member 131, so that the pressing unit B12 moves along the upper surface of the prefabricated mold 231, and at this time, the pressing unit a11 presses the shape of the battery 3, so that the shape of the battery 3 is the same as that of the prefabricated mold 231.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a preparation equipment of flexible battery of resistant crooked type which characterized in that, includes mould subassembly (1) and lower mould subassembly (2), lower mould subassembly (2) bear battery (3) of treating the plastic, go up mould subassembly (1) set up in the top of lower mould subassembly (2), should go up mould subassembly (1) right battery (3) carry out the roll extrusion plastic.

2. The apparatus for manufacturing a bending-resistant flexible battery according to claim 1, wherein the lower mold assembly (2) comprises a base (211), a clamp (241) disposed on the base (211), and a forming mold (221) which is detachable with respect to the base (211), the forming mold (221) is disposed on one side of the clamp (241), the battery (3) is placed on the forming mold (221) and one end of the battery (3) is clamped by the clamp (241).

3. The manufacturing equipment of the bending-resistant flexible battery according to claim 2, wherein the upper surface of the forming bottom die (221) is provided with corrugated grooves with regular or irregular depth and regular or irregular intervals, and the forming bottom die (221) is made of metal or organic material, has certain hardness, and has an insulated surface.

4. The apparatus for manufacturing a flexible battery of the bending resistance type according to claim 2, wherein the upper mold assembly (1) comprises a rigid structure (131) and a pressing unit A (11) disposed at one end of the rigid structure (131), the rigid structure (131) is subjected to a vertical downward pressure F1 and a horizontal force F2, and the pressing unit A (11) applies a force to the battery (3) on the forming bottom mold (221) to shape the battery.

5. The manufacturing apparatus of a bending-resistant flexible battery according to claim 4, wherein the lower mold assembly (2) further comprises a track bottom mold (222) and a pre-mold (231), the track bottom mold (222) is disposed on the other side of the fixture (241) relative to the forming bottom mold (221), and the pre-mold (231) is disposed on the track bottom mold (222).

6. The apparatus for manufacturing a bending-resistant flexible battery according to claim 5, wherein the upper mold assembly (1) further comprises a pressing unit B (12), the pressing unit B (12) is disposed on the rigid structural member (131), the pressing unit B (12) is aligned with the pressing unit A (11) in a height direction, and the pressing unit B (12) is disposed corresponding to the prefabricated mold (231).

7. The manufacturing equipment of the bending-resistant flexible battery according to claim 5, wherein the forming bottom die (221) and the track bottom die (222) are arranged in parallel, and the upper surface of the forming bottom die (221) and the upper surface of the track bottom die (222) are kept consistent in shape.

8. The manufacturing equipment of a flexible battery of bending resistance type according to claim 6, wherein said pressing unit B (12) and said pressing unit A (11) each comprise a connecting rod (111) and a roller (113), said roller (113) is free to rotate relative to said connecting rod (111), and the outer diameter of said roller (113) is smaller than the inner diameter of the recess of the upper surface of said forming die (221).

9. The manufacturing equipment of the flexible battery with bending resistance as claimed in claim 8, further comprising a transverse guide rail (121) and a linear bearing (112), wherein both of the connecting rods (111) are connected to the transverse guide rail (121) through the linear bearing (112).

10. A preparation method of a bending-resistant flexible battery is characterized by comprising the following steps:

step one, selecting a prefabricated mould, selecting a corresponding prefabricated mould (231) according to the shape of a battery (3) to be processed and formed, and placing the prefabricated mould (231) on a track bottom mould (222);

secondly, feeding the battery, namely clamping one end of the battery (3) to be processed on a clamp (241), and enabling a main body of the battery (3) to lie on a forming bottom die (221);

adjusting the distance between the pressing units, namely adjusting the distance between the pressing unit A (11) and the pressing unit B (12) according to the positions of the battery (3) and the prefabricated mold (231), so that the pressing unit A (11) corresponds to the right end part of the battery (3) and the pressing unit B (12) corresponds to the right end part of the prefabricated mold (231);

and step four, pressing and shaping, namely applying downward pressure F1 and leftward thrust F2 to the rigid structural part (131) to enable the pressing unit B (12) to move along the upper surface of the prefabricated mould (231), and pressing the shape of the battery (3) by the pressing unit A (11) at the moment to enable the shape of the battery (3) to be identical to the shape of the prefabricated mould (231).