CN216980660U

CN216980660U - Battery roll core hot-pressing system

Info

Publication number: CN216980660U
Application number: CN202220637803.8U
Authority: CN
Inventors: 黄立军; 杨中舒
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2022-07-15
Anticipated expiration: 2032-03-16

Abstract

The utility model discloses a battery roll core hot-pressing system, which comprises a baking device, a roll core feeding device and a hot-pressing device, wherein the baking device comprises a baking tray, a rolling tray feeding device and a hot-pressing device; the baking device is used for heating the coiled core, and the coiled core feeding device is used for feeding materials to the hot pressing device; the hot-pressing device comprises a first driving mechanism, an upper hot-pressing plate, an upper short-circuit detection plate, a lower hot-pressing plate, a second driving mechanism and a lower short-circuit detection plate, wherein the output end of the first driving mechanism is connected with the upper hot-pressing plate and the upper short-circuit detection plate, the lower hot-pressing plate is fixed under the upper hot-pressing plate, and the output end of the second driving mechanism is connected with the lower short-circuit detection plate arranged under the upper short-circuit detection plate. The hot pressing system has the advantages that the hot pressing system ensures that the temperature requirement of the winding core before hot pressing is met, reduces the hot pressing time of the hot pressing device, prevents the phenomenon that the pole piece falls off and even breaks during shaping of the bending part of the winding core, ensures the quality of a battery at the later stage, and improves the production efficiency of the system.

Description

Battery roll core hot-pressing system

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a battery roll core hot-pressing system.

Background

In the winding process of the battery winding core, certain tension must be applied to the diaphragm to ensure the uniformity between the positive plate, the diaphragm and the negative plate, however, the tension in the process can cause the diaphragm to be elongated in the tape running direction, the shrinkage of the diaphragm in the tape running direction is large, the diaphragm can seriously extrude the pole piece, thereby causing the deformation of the battery core after the battery core assembling process, the battery core after the deformation has poor appearance flatness, the inside has the defects of diaphragm folds and the like, the quality problems of low capacity, poor cycle performance, fast self-discharge and the like can be caused, particularly, the thicker battery core is wound, and the deformation problem after the winding is particularly prominent. In addition, the consistency of the thickness of the loose battery core is poor, which can affect the battery core casing process, increase the difficulty of the casing process, and even cause the damage of the battery core during casing.

In the current assembly procedure, a wound battery cell is generally placed on a template, the pressure of a pressure cylinder and the temperature of the template are set, then the upper and lower templates are used for shaping the battery cell under the action of certain pressure and temperature to achieve the consistency of the thickness of the battery cell, so that the elasticity of the battery cell is reduced, the qualified rate of the battery cell is reduced, the consistency of the thickness of the finished product battery cell is ensured, for example, the Chinese utility model patent publication No. CN209515904U discloses a hot-pressing shaping device for a winding core, in particular to the hot-pressing mode, but the winding core adopting the mode is in a normal temperature state when initially pressed and does not meet the temperature requirement of hot pressing, so that the pole piece is easy to fall powder or even break in the shaping of the bending part of the winding core when initially pressed, moreover, the hot pressing and finishing time is long, the pole pieces are easy to fall off powder and even break, the electronic transmission of the battery is limited in the later period, the internal resistance of the battery is increased, and the quality of the battery is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is how to prevent the phenomenon that the pole piece is broken even when the bending part of the winding core is shaped.

In order to solve the technical problems, the utility model provides the following technical scheme:

a battery roll core hot-pressing system comprises a baking device, a roll core feeding device and a hot-pressing device;

the baking device is used for heating the winding core, and the winding core feeding device is used for feeding materials to the hot-pressing device;

the hot-pressing device comprises a first driving mechanism, an upper hot-pressing plate, an upper short-circuit detection plate, a lower hot-pressing plate, a second driving mechanism and a lower short-circuit detection plate, wherein the output end of the first driving mechanism is connected with the upper hot-pressing plate and the upper short-circuit detection plate, the lower hot-pressing plate is fixed under the upper hot-pressing plate, and the output end of the second driving mechanism is connected with the lower short-circuit detection plate arranged under the upper short-circuit detection plate.

This hot pressing system passes through baking equipment is to rolling up the core heating for roll up the core and carry out heat treatment before the hot pressing, guaranteed roll core temperature requirement when reaching hot pressing and putting before hot pressing and put the time of hot pressing and putting, not only prevent to roll up the core and bend that the pole piece falls whitewashed or cracked phenomenon even takes place in the department's plastic, guarantee the quality of later stage battery, still improved the production efficiency of this system.

Preferably, hot press unit still includes first base and second base, baking equipment's output is close to first base setting, second base, roll up core loading attachment, lower hot pressboard and second actuating mechanism are all fixed on first base, fix on the second base first actuating mechanism.

Preferably, the baking device comprises a conveying mechanism and an oven, wherein the output end of the conveying mechanism is arranged close to the first base, and the conveying mechanism fixes the oven.

Preferably, roll up core loading attachment and press from both sides and get the mechanism including lead screw moving mechanism, material loading cylinder, fixed plate and clamp, lead screw moving mechanism fixes on first base, lead screw moving mechanism's removal end is fixed the material loading cylinder, the output of material loading cylinder is connected the fixed plate, the fixed clamp that can press from both sides and get the core of rolling is got the mechanism on the fixed plate.

Preferably, lead screw moving mechanism includes slide rail, fixing base, thread bush, slider, driving motor and lead screw, the slide rail parallel fixation is on first base, the fixing base bottom be equipped with slide rail complex slider, the fixing base bottom still is fixed with the thread bush, driving motor fixes on first base, driving motor's output connection lead screw, driving motor's one end and thread bush cooperation are kept away from to the lead screw.

Preferably, the clamping mechanism comprises a clamping cylinder and a clamping plate, the two clamping cylinders are fixed on one side of the fixing plate close to the hot pressing device, and the clamping plates are fixed at the output ends of the two clamping cylinders and are arranged oppositely.

Preferably, the upper short circuit detection plate is connected with the output end of the first driving mechanism through a spring; the spring can take place corresponding deformation according to the dynamics that last short circuit detection board pushed down, and the phenomenon that the pressure was excessive and caused electric core utmost point ear pressure to break takes place when avoiding first actuating mechanism to push down and pressure is excessive when second actuating mechanism upwards pushed.

Compared with the prior art, the utility model has the beneficial effects that:

1. this hot pressing system passes through baking equipment is to rolling up the core heating for roll up the core and carry out heat treatment before the hot pressing, guaranteed roll core temperature requirement when reaching hot pressing and putting before hot pressing and put the time of hot pressing and putting, not only prevent to roll up the core and bend that the pole piece falls whitewashed or cracked phenomenon even takes place in the department's plastic, guarantee the quality of later stage battery, still improved the production efficiency of this system.

2. Through the setting of spring, the phenomenon that the pressure is excessive when first actuating mechanism pushes down and the pressure is excessive when second actuating mechanism pushes up and causes electric core utmost point ear to press absolutely takes place.

Drawings

Fig. 1 is a schematic structural diagram of a battery roll core hot-pressing system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a baking apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a core loading device according to an embodiment of the utility model;

fig. 4 is a schematic structural diagram of a hot press apparatus according to an embodiment of the present invention.

Detailed Description

In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless explicitly stated or limited otherwise, 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 implying any 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 application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, the present embodiment discloses a battery roll core hot pressing system, which includes a baking device 1, a roll core feeding device 2 and a hot pressing device 3.

Referring to fig. 2, baking equipment 1 includes conveying mechanism 11 and oven 12, conveying mechanism 11's output is close to hot press unit 3 and sets up, conveying mechanism 11 is last solid oven 12, oven 12 is used for heating the book core for roll core carries out the heat treatment before the hot pressing, has guaranteed that roll core reaches the temperature requirement when hot pressing is put in order and has reduced the time of hot pressing before hot pressing is put in order, not only prevents to roll core and bends and fall pole piece powder or even cracked phenomenon emergence in the department of shaping, guarantees the quality of later stage battery, has still improved the production efficiency of this system.

Further, the conveying mechanism 11 is a belt conveying mechanism.

Referring to fig. 3, the core feeder 2 is used to feed a core to the hot press 3; roll up core loading attachment 2 includes lead screw moving mechanism 21, material loading cylinder 22, fixed plate 23 and presss from both sides and get mechanism 24, the removal end of lead screw moving mechanism 21 is fixed material loading cylinder 22, the drive lead screw moving mechanism 21 drives material loading cylinder 22 removes, the output of material loading cylinder 22 is connected fixed plate 23, fixed plate 23 is close to the fixed clamp that can press from both sides the clamp that gets the core of hot press unit 3 and gets mechanism 24.

Screw rod moving mechanism 21 includes slide rail 211, fixing base 212, thread bush (not shown in the figure), slider (not mark in the figure), driving motor 213 and lead screw 214, slide rail 211 parallel fixation is on hot press unit 3, fixing base 212 bottom is equipped with the slider with slide rail 211 complex, fixing base 212 bottom still is fixed with the thread bush, driving motor 213 is fixed at hot press unit 3, lead screw 214 is connected to driving motor 213's output, the one end and the thread bush cooperation that driving motor 213 was kept away from to lead screw 214.

The clamping mechanism 24 comprises a clamping cylinder 241 and a clamping plate 242, two clamping cylinders 241 are fixed on one side of the fixing plate 23 close to the hot pressing device 3, the clamping plate 242 is fixed on the output ends of the two clamping cylinders 241, and the clamping plates 242 are arranged oppositely.

The hot-press device 3 comprises a first base 31, a second base 32, a first driving mechanism 33, an upper hot-press plate 34, an upper short-circuit detection plate 35, a lower hot-press plate 36, a second driving mechanism 37 and a lower short-circuit detection plate 38, wherein the second base 32 and the core feeding device 2 are fixed on the first base 31, the first driving mechanism 33 is fixed on the second base 32, the output end of the first driving mechanism 33 penetrates through the second base 32 and is connected with the upper hot-press plate 34 and the upper short-circuit detection plate 35, the lower hot-press plate 36 is fixed on the first base 31 right below the upper hot-press plate 34, the second driving mechanism 37 is fixed on the first base 31, and the output end of the second driving mechanism 37 is connected with the lower short-circuit detection plate 38 arranged right below the upper short-circuit detection plate 35. Specifically, the first driving mechanism 33 drives the upper hot pressing plate 34 to press down and approach the lower hot pressing plate 36, so as to realize hot pressing of the winding core, meanwhile, the first driving mechanism 33 also drives the upper short circuit detection plate 35 to press the top surface of the upper tab of the winding core, and the second driving mechanism 37 drives the lower short circuit detection plate 38 to press the bottom surface of the upper tab of the winding core, so as to realize short circuit detection of the tab.

Further, the upper short circuit detection plate 35 is connected with the output end of the first driving mechanism 33 through a spring 39, and the spring 39 deforms correspondingly according to the downward pressing force of the upper short circuit detection plate 35, so that the phenomenon that the tab is broken due to excessive pressure when the first driving mechanism 33 presses downward and excessive pressure when the second driving mechanism 37 presses upward is avoided.

Still further, the first driving mechanism 33 and the second driving mechanism 37 are both driven by an air cylinder.

The working principle of the embodiment is as follows: conveying the winding cores onto a conveying mechanism 11 and into an oven 12 to heat the winding cores, and conveying the heated winding cores onto a first base 31 through the conveying mechanism 11; then material loading cylinder 22 drives fixed plate 23 is close to the core of rolling up after the heating, and the redriving press from both sides and get cylinder 241, gets the core clamp through two splint 242, then material loading cylinder 22 drives fixed plate 23 retrieves, restarts driving motor 213 and drives lead screw 214 and rotate, and then drives fixing base 212 redrives after being close to hot pressing device 3 material loading cylinder 22 is close to through fixed plate 23 hot pressing board 36 downwards to place the core that splint 242 got on hot pressing board 36 down, then material loading cylinder 22 drives fixed plate 23 retrieves. And then driving the first driving mechanism 33 to drive the upper hot pressing plate 34 and the upper short circuit detection plate 35 to press down, and simultaneously driving the second driving mechanism 37 to drive the lower short circuit detection plate 35 to ascend, so as to realize hot pressing and finishing of the winding core and short circuit detection of the tab.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not to be construed as limiting the claims.

The above-mentioned embodiments only represent the embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the concept of the present invention, and these embodiments are all within the protection scope of the present invention.

Claims

1. The utility model provides a battery rolls up core hot pressing system which characterized in that: comprises a baking device, a winding core feeding device and a hot-pressing device;

2. The battery roll core hot pressing system of claim 1, characterized in that: the hot pressing device further comprises a first base and a second base, the output end of the baking device is close to the first base, the second base, the roll core feeding device, the lower hot pressing plate and the second driving mechanism are fixed on the first base, and the first driving mechanism is fixed on the second base.

3. The battery roll core hot pressing system of claim 2, characterized in that: the baking device comprises a conveying mechanism and an oven, wherein the output end of the conveying mechanism is close to the first base, and the conveying mechanism is fixedly arranged on the oven.

4. The battery roll core hot pressing system of claim 2, characterized in that: roll up core loading attachment includes that lead screw moving mechanism, material loading cylinder, fixed plate and clamp get the mechanism, lead screw moving mechanism fixes on first base, lead screw moving mechanism's removal end is fixed the material loading cylinder, the output of material loading cylinder is connected the fixed plate, the fixed clamp that can press from both sides and get the core of rolling is got the mechanism on the fixed plate.

5. The battery roll core hot pressing system of claim 4, wherein: the screw rod moving mechanism comprises a slide rail, a fixed seat, a threaded sleeve, a slide block, a driving motor and a screw rod, the slide rail is parallelly fixed on a first base, the slide block matched with the slide rail is arranged at the bottom of the fixed seat, the threaded sleeve is further fixed at the bottom of the fixed seat, the driving motor is fixed on the first base, the output end of the driving motor is connected with the screw rod, and one end, away from the driving motor, of the screw rod is matched with the threaded sleeve.

6. The battery roll core hot pressing system of claim 4, wherein: the clamping mechanism comprises a clamping cylinder and a clamping plate, two clamping cylinders are fixed on one side of the fixing plate close to the hot pressing device, and the output ends of the two clamping cylinders are fixed with the clamping plate and are arranged oppositely.

7. The battery roll core hot pressing system of claim 1, characterized in that: and the upper short circuit detection plate is connected with the output end of the first driving mechanism through a spring.