CN114335753A - Hot-pressing heating device and method for lithium ion battery after winding - Google Patents
Hot-pressing heating device and method for lithium ion battery after winding Download PDFInfo
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- CN114335753A CN114335753A CN202111392926.6A CN202111392926A CN114335753A CN 114335753 A CN114335753 A CN 114335753A CN 202111392926 A CN202111392926 A CN 202111392926A CN 114335753 A CN114335753 A CN 114335753A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a hot-pressing heating device and a method after a lithium ion battery is wound, wherein the device comprises a battery core pressing and heating assembly, a tab heating assembly and a driving assembly, wherein the battery core pressing and heating assembly and the tab heating assembly are both connected with the driving assembly; the battery cell pressing and heating assembly comprises a battery cell upper pressing plate (1) and a battery cell lower pressing plate (2) which are respectively arranged on the upper side and the lower side of the battery cell main body; the tab heating assembly comprises a tab upper heating plate (3) and a tab lower heating plate (4) which are respectively arranged on the upper side and the lower side of the electric core tab. Compared with the prior art, the invention can reduce the heating temperature, rapidly and flatly heat the battery core and reduce the heating time, thereby effectively improving the production efficiency and reducing the manufacturing cost of the lithium battery.
Description
Technical Field
The invention relates to the technical field of lithium battery manufacturing, in particular to a hot-pressing heating device and method for a lithium ion battery after being wound.
Background
The lithium ion battery has the advantages of high energy density, high average output voltage, no memory effect in use, wide working temperature range, excellent cycle performance and long service life, and is widely applied to the fields of electronic equipment and new energy automobiles.
Winding is one of important processes in the production process of lithium batteries, and a certain tension must be applied to the separator during winding so as to ensure the regularity among the positive plate, the separator and the negative plate. However, the tension in the process can cause the diaphragm to be elongated in the tape running direction, so that the diaphragm seriously extrudes the pole piece after winding, and the battery cell is deformed, the battery cell has poor appearance flatness, the inside of the battery cell also has the defects of diaphragm wrinkles and the like, the uneven thickness consistency of the battery cell is poor, the battery cell entering process is influenced, the difficulty of the entering process is increased, and even the battery cell is damaged when the battery cell enters the shell. Consequently need carry out the hot pressing to electric core before going into the shell and level, traditional hot pressing mode adopts the high temperature hot pressboard to heat electric core main part, relies on heat-conduction transfer heat, but electric core surface has the one deck barrier film, and heat transfer efficiency is low during the heating, and heating time is long, influences production efficiency.
Disclosure of Invention
The invention aims to provide a hot-pressing heating device and a hot-pressing heating method for a lithium ion battery after being wound, which are used for quickly and flatly heating a battery core.
The purpose of the invention can be realized by the following technical scheme: a hot-pressing heating device for a lithium ion battery after being wound comprises a battery cell pressing and heating assembly, a tab heating assembly and a driving assembly, wherein the battery cell pressing and heating assembly and the tab heating assembly are both connected with the driving assembly;
the battery cell pressing and heating assembly comprises a battery cell upper pressing plate and a battery cell lower pressing plate which are respectively arranged on the upper side and the lower side of the battery cell main body;
the tab heating assembly comprises an upper tab heating plate and a lower tab heating plate which are respectively arranged on the upper side and the lower side of a tab of the battery cell.
Preferably, the electric core upper pressing plate and the electric core lower pressing plate are internally provided with at least one heating body, the electric core main body can be uniformly covered, the whole electric core is ensured to be heated flatly, the consistency of the thickness of the electric core can be ensured, the gap between the positive electrode piece and the negative electrode piece can be reduced, and the heating efficiency is improved. The heating plate can evenly cover electric core utmost point ear on utmost point ear and under the utmost point ear, ensures to heat each position of electric core utmost point ear, can ensure to heat the uniformity, can improve heating efficiency again.
Preferably, the cell upper pressing plate is connected with a first driving assembly; and the lug upper heating plate is connected with a second driving assembly.
Further preferably, a first pressure sensor is arranged between the cell upper pressing plate and the first driving assembly; and a second pressure sensor is arranged between the upper heating plate of the tab and the second driving assembly.
Preferably, the cell upper pressing plate is connected with a first guide assembly; and the upper heating plate of the lug is connected with a second guide assembly.
Further preferably, the first driving assembly and the second driving assembly both comprise air cylinders, the air cylinders are fixed on the upper top plate, and the first guiding assembly and the second guiding assembly both comprise guide posts arranged on the upper top plate in a penetrating mode.
Preferably, the upper heating plate of the tab is connected with the upper top plate through two guide posts, so that the up-and-down movement stability of the upper heating plate of the tab is ensured. The battery cell upper press plate is connected with the upper top plate through the two guide posts, so that the stability of the battery cell upper press plate in up-and-down motion is ensured.
Still further preferably, the cell lower pressing plate and the tab lower heating plate are fixed on the lower base plate, and the upper top plate is fixed above the lower base plate through the upright post. Preferably, the edges of the upper top plate and the lower bottom plate are provided with four symmetrically arranged mounting holes, the four stand columns are arranged in the four mounting holes respectively, and the hot-pressing heating device is more balanced and stable after the stand columns are mounted.
Preferably, the device further comprises a cell positioning assembly for positioning the cell.
Further preferably, the battery cell positioning assembly includes a fixing block disposed at a tail portion of the battery cell main body. The fixed block is fixed at the tail part of the winding electric core and used for positioning the winding electric core.
Preferably, at least one heating body is arranged in the lug upper heating plate and the lug lower heating plate. When heating electric core utmost point ear, the heat-generating body generates heat earlier, later gives the hot plate under hot plate and the utmost point ear on the utmost point ear with the heat transfer, and then heating electric core utmost point ear and main part. For improving the heating uniformity, a heating body can be respectively arranged at the contact part of the lug of the battery cell in the lug upper heating plate and the lug lower heating plate, so that the heat conduction is more uniform and faster, and the heating efficiency is improved.
In the invention, the upper lug heating plate can evenly clamp and heat the winding battery core lug when approaching the lower lug heating plate, the upper lug heating plate is connected with the pressure sensor and used for controlling the pressure for heating the lug, and the lower lug heating plate is connected with the lower bottom plate and used for heating the winding battery core lug together with the upper lug heating plate. The electric core upper press plate and the electric core lower press plate level and compact the coiling electric core main body under the action of pressure, the electric core upper press plate is connected with the pressure sensor and used for controlling the pressure of the level electric core, the electric core lower press plate is connected with the lower base and level, compact and heat the coiling electric core main body together with the electric core upper press plate, and the heating time of the whole electric core is shortened.
A hot-pressing heating method after a lithium ion battery is wound is carried out by using the device, and comprises the following steps:
s1: placing the wound battery cell on a battery cell lower pressing plate, and placing a lug in front of the battery cell on a lug lower heating plate;
s2: the driving assembly is used for driving the cell upper pressing plate to move downwards to contact the cell main body, and the driving assembly is used for driving the lug upper heating plate to move downwards to contact the cell lug;
s3: heating the battery core lug and the main body by the lug upper heating plate, the lug lower heating plate, the battery core upper pressing plate and the battery core lower pressing plate;
s4: and driving the upper pressing plate of the battery core and the upper heating plate of the lug to move upwards by using the driving assembly, taking out the battery core and completing heating.
Further preferably, in step S2, the pressure applied to the cell body by the cell upper pressing plate is controlled to 8000N to 15000N by the first pressure sensor, and the pressure applied to the cell tab by the tab upper heating plate is controlled to 50N to 200N by the second pressure sensor.
Compared with the prior art, the invention has the following advantages:
1. the device can reduce the heating temperature, quickly and flatly heat the cell main body and the electrode lug, and reduce the heating time, thereby effectively improving the production efficiency and reducing the manufacturing cost of the lithium battery;
2. in the device, the cell upper pressing plate and the cell lower pressing plate are directly contacted with the cell main body to level and heat the cell, the lug upper heating plate and the lug lower heating plate are directly contacted with the cell lug to conduct heat, the heating temperature is low, the heating speed is high, and the production efficiency is increased;
3. the cell upper pressing plate and the cell lower pressing plate can uniformly cover the cell main body, the cell is leveled under the action of pressure, gaps between the positive and negative pole pieces are reduced, the cell upper pressing plate and the cell lower pressing plate can simultaneously heat the cell main body, the lug upper heating plate and the lug lower heating plate can uniformly cover the cell lugs, and each position of the cell lugs is heated, so that the heating consistency can be ensured, the cell lugs can be rapidly heated at a lower temperature under the action of the cell upper pressing plate and the cell lower pressing plate, the heating temperature is reduced, the heating efficiency is increased, and the manufacturing cost of the lithium battery is reduced;
4. the device has simple structure and is easy to realize multistage series connection and automation.
Drawings
FIG. 1 is a schematic structural diagram of a hot-pressing heating device after a lithium ion battery is wound;
in the figure: 1-a cell upper pressing plate, 2-a cell lower pressing plate, 3-a tab upper heating plate, 4-a tab lower heating plate, 5-a first driving assembly, 6-a second driving assembly, 7-a first pressure sensor, 8-a second pressure sensor, 9-a first guiding assembly, 10-a second guiding assembly, 11-an upper top plate, 12-a lower bottom plate, 13-a stand column, 14-a cell positioning assembly and 15-a cell.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples.
Example 1
A hot-pressing heating device for a lithium ion battery after being wound comprises a first driving assembly 5 (air cylinder), a second driving assembly 6 (air cylinder), a first guide assembly 9 (guide pillar), a second guide assembly 10 (guide pillar), a stand column 13, an upper top plate 11, a lower bottom plate 12, a cell upper pressing plate 1, a cell lower pressing plate 2, a first pressure sensor 7, a second pressure sensor 8, a cell positioning assembly 14 (fixed block), a lug upper heating plate 3 and a lug lower heating plate 4, wherein the first driving assembly 5 is fixed on the upper top plate 11 and is connected with the cell upper pressing plate 1 through the first pressure sensor 7, and the cell upper pressing plate 1 is connected with the upper top plate 11 through the first guide assembly 9; the second driving assembly 6 is fixed on the upper top plate 11, the lug upper heating plate 3 is connected with the second driving assembly 6 through a second pressure sensor 8, and the lug upper heating plate 3 is connected with the upper top plate 11 through a second guide assembly 10; the upper top plate 11 and the lower bottom plate 12 are fixed through a vertical column 13; the cell positioning component 14 is fixed on the lower base plate 12 by screws, so that the cell positioning is facilitated; the battery cell lower pressing plate 2 is fixed on the lower bottom plate 12 through a screw; the lower heating plate 4 for the tab is fixed on the lower base plate 12 through screws.
Example 2
A method for heating a cell using the lithium ion battery of embodiment 1 in a hot press apparatus after winding, comprising the steps of:
step one, placing a wound battery core 15 on a battery core lower pressing plate 2, wherein the position of a main body of the battery core 15 is moderate, the tail part of the battery core 15 is flush with a battery core positioning component 14, and a lug at the front part of the battery core 15 is placed on a lug lower heating plate 4;
step two, starting the first driving assembly 5, driving the cell upper pressing plate 1 to move downwards by the first driving assembly 5 until the cell upper pressing plate contacts with the cell 15 main body, and stopping the first driving assembly 5 when the value of the first pressure sensor 7 reaches 8000-15000N;
step three, starting a second driving assembly 6, driving the lug upper heating plate 3 to move downwards by the second driving assembly 6 until the lug upper heating plate contacts with a lug of a battery cell 15, and stopping the second driving assembly 6 when the value of a second pressure sensor 8 reaches 50-200N;
and step four, starting heat sources in the battery cell upper pressing plate 1, the battery cell lower pressing plate 2, the lug upper heating plate 3 and the lug lower heating plate 4, heating the battery cell 15 main body and the lug, stopping heating until the temperature of the battery cell 15 reaches 80-120 ℃, opening the second driving assembly 6 and the first driving assembly 5, moving the lug upper heating plate 3 and the battery cell upper pressing plate 1 upwards, taking out the battery cell 15, and finishing heating.
In the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. A hot-pressing heating device after a lithium ion battery is wound is characterized by comprising a battery cell pressing and heating assembly, a tab heating assembly and a driving assembly, wherein the battery cell pressing and heating assembly and the tab heating assembly are both connected with the driving assembly;
the battery cell pressing and heating assembly comprises a battery cell upper pressing plate (1) and a battery cell lower pressing plate (2) which are respectively arranged on the upper side and the lower side of the battery cell main body;
the tab heating assembly comprises a tab upper heating plate (3) and a tab lower heating plate (4) which are respectively arranged on the upper side and the lower side of the electric core tab.
2. The lithium ion battery post-winding hot-pressing heating device according to claim 1, wherein the cell upper pressing plate (1) is connected with a first driving assembly (5); and the lug upper heating plate (3) is connected with a second driving assembly (6).
3. The hot-pressing heating device after the lithium ion battery is wound according to claim 2, wherein a first pressure sensor (7) is arranged between the cell upper pressing plate (1) and the first driving assembly (5); and a second pressure sensor (8) is arranged between the lug upper heating plate (3) and the second driving assembly (6).
4. The lithium ion battery hot-pressing heating device after winding according to claim 2, characterized in that the cell upper pressing plate (1) is connected with a first guide assembly (9); and the lug upper heating plate (3) is connected with a second guide assembly (10).
5. The lithium ion battery hot-pressing heating device after winding according to claim 4, characterized in that the first driving assembly (5) and the second driving assembly (6) each comprise a cylinder fixed on the upper top plate (11), and the first guiding assembly (9) and the second guiding assembly (10) each comprise a guide post penetrating the upper top plate (11).
6. The hot-pressing heating device after the lithium ion battery is wound according to claim 5, wherein the cell lower pressing plate (2) and the tab lower heating plate (4) are fixed on the lower bottom plate (12), and the upper top plate (11) is fixed above the lower bottom plate (12) through the upright post (13).
7. The lithium ion battery post-winding hot-pressing heating device according to claim 1, characterized in that the device further comprises a cell positioning assembly (14) for positioning the cells.
8. The lithium ion battery post-winding hot-pressing heating device of claim 7, characterized in that the cell positioning assembly (14) comprises a fixing block arranged at the tail of the cell body.
9. The lithium ion battery post-winding hot-pressing heating device according to claim 1, wherein at least one heating body is arranged in each of the tab upper heating plate (3) and the tab lower heating plate (4);
and at least one heating body is arranged in each of the cell upper pressing plate (1) and the cell lower pressing plate (2).
10. A method for hot-press heating of a lithium ion battery after winding, characterized by using the apparatus according to any one of claims 1 to 9, comprising the steps of:
s1: placing the wound battery cell on a battery cell lower pressing plate (2), and placing a lug in front of the battery cell on a lug lower heating plate (4);
s2: the driving assembly is used for driving the cell upper pressing plate (1) to move downwards to contact the cell main body, and the driving assembly is used for driving the lug upper heating plate (3) to move downwards to contact the cell lug;
s3: heating the battery cell lug and the main body by using the lug upper heating plate (3), the lug lower heating plate (4), the battery cell upper pressing plate (1) and the battery cell lower pressing plate (2);
s4: and driving the cell upper pressing plate (1) and the lug upper heating plate (3) to move upwards by using the driving assembly, taking out the cell and completing heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111392926.6A CN114335753A (en) | 2021-11-23 | 2021-11-23 | Hot-pressing heating device and method for lithium ion battery after winding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111392926.6A CN114335753A (en) | 2021-11-23 | 2021-11-23 | Hot-pressing heating device and method for lithium ion battery after winding |
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| CN114335753A true CN114335753A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111392926.6A Pending CN114335753A (en) | 2021-11-23 | 2021-11-23 | Hot-pressing heating device and method for lithium ion battery after winding |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205723816U (en) * | 2016-04-05 | 2016-11-23 | 东莞市德瑞精密设备有限公司 | Hot pressing mechanism |
| CN106654391A (en) * | 2017-01-20 | 2017-05-10 | 宁德时代新能源科技股份有限公司 | Hot press unit for electricity core |
| CN209266512U (en) * | 2019-02-11 | 2019-08-16 | 多氟多新能源科技有限公司 | A kind of stacked naked battery core cold-hot pressure carrier |
| CN211556053U (en) * | 2020-01-10 | 2020-09-22 | 深圳市坤鼎自动化有限公司 | Self-lifting type lithium battery cell hot-pressing device |
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2021
- 2021-11-23 CN CN202111392926.6A patent/CN114335753A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205723816U (en) * | 2016-04-05 | 2016-11-23 | 东莞市德瑞精密设备有限公司 | Hot pressing mechanism |
| CN106654391A (en) * | 2017-01-20 | 2017-05-10 | 宁德时代新能源科技股份有限公司 | Hot press unit for electricity core |
| CN209266512U (en) * | 2019-02-11 | 2019-08-16 | 多氟多新能源科技有限公司 | A kind of stacked naked battery core cold-hot pressure carrier |
| CN211556053U (en) * | 2020-01-10 | 2020-09-22 | 深圳市坤鼎自动化有限公司 | Self-lifting type lithium battery cell hot-pressing device |
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