LU602876B1 - Baking device for electrode coil of battery cell - Google Patents

Baking device for electrode coil of battery cell

Info

Publication number
LU602876B1
LU602876B1 LU602876A LU602876A LU602876B1 LU 602876 B1 LU602876 B1 LU 602876B1 LU 602876 A LU602876 A LU 602876A LU 602876 A LU602876 A LU 602876A LU 602876 B1 LU602876 B1 LU 602876B1
Authority
LU
Luxembourg
Prior art keywords
baking chamber
baking
nitrogen gas
battery cell
pressure
Prior art date
Application number
LU602876A
Other languages
French (fr)
Inventor
Lei Chen
Original Assignee
Henan Top Energy Tech Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Henan Top Energy Tech Co Ltd filed Critical Henan Top Energy Tech Co Ltd
Priority to LU602876A priority Critical patent/LU602876B1/en
Application granted granted Critical
Publication of LU602876B1 publication Critical patent/LU602876B1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

Disclosed is a baking device for an electrode coil of a battery cell, including: a baking chamber, a sealing door and a gas circulation assembly. The sealing door is used for sealing an entrance and exit of an electrode coil of a battery cell of the baking chamber; the gas circulation assembly is used for continuously inputting clean nitrogen gas into the baking chamber, and continuously discharging the nitrogen gas to circulate the nitrogen gas in the baking chamber; and a heating pipe is arranged on a rear side wall of the baking chamber, and is used for heating nitrogen gas entering the baking chamber. The device solves the problems of high energy consumption and long baking time, and also solves the problems of material relaxation and even the risk of base material falling off caused by the baking process of the traditional negative pressure baking device.

Description

DESCRIPTION LU602876
BAKING DEVICE FOR ELECTRODE COIL OF BATTERY CELL
TECHNICAL FIELD
The present invention generally relates to the technical field of lithium batteries.
More specifically, the present invention relates to a baking device for an electrode coil of a battery cell.
BACKGROUND
With the rapid development of the new energy industry, as the core energy storage component, the performance and technical level of lithium batteries are directly related to the competitiveness and market position of products. The traditional baking process of an electrode coil of a battery cell has problems such as high energy consumption and long baking time. In addition, the traditional baking process of an electrode coil of a battery cell uses vacuum baking (i.e., negative pressure baking) to remove water. Its main principle is to forcibly remove the moisture in the pole piece by applying negative pressure to the electrode coil of the battery cell to achieve the effect of water removal.
During this process, the effect of negative pressure will lead to the risk of material relaxation or even the substrate falling off.
In view of this, there is an urgent need to provide a baking device different from the traditional negative pressure baking method to solve the problem.
SUMMARY LU602876
To solve at least one or more technical problems in the above background, the present invention provides a baking device for an electrode coil of a battery cell.
For this reason, the present invention provides the following technical solutions.
The present invention provides a baking device for an electrode coil of a battery cell, including: a baking chamber, a sealing door and a gas circulation assembly. The sealing door is used for sealing an entrance and exit of an electrode coil of a battery cell of the baking chamber when the electrode coil of the battery cell is baked; the gas circulation assembly is used for continuously inputting clean nitrogen gas into the baking chamber through a first intake port, and continuously discharging the nitrogen gas through a first exhaust port to circulate the nitrogen gas in the baking chamber, the first intake port and the first exhaust port are respectively located on opposite left and right sides inside the baking chamber, the gas circulation assembly is also used for maintaining a pressure in the baking chamber as a preset pressure, and the preset pressure is greater than an outside atmospheric pressure; and a heating pipe is arranged on a rear side wall of the baking chamber, and the heating pipe is used for heating nitrogen gas entering the baking chamber.
Preferably, two sides of the sealing door are hinged with levers and auxiliary arms, the other end of each lever is hinged to a telescopic end of a drive cylinder, a fixing end of the drive cylinder is hinged to a frame body of the device, and the other end of each auxiliary arm is hinged to the frame body.
Preferably, the device further includes latches for locking the sealing door when the sealing door seals the baking chamber.
Preferably, a first proportional flow valve is arranged on a nitrogen gas pipeline connected to the first intake port, and a second proportional flow valve is arranged on a nitrogen gas pipeline connected to the first exhaust port; and when the pressure in the baking chamber is the preset pressure, the amount of nitrogen gas passing through the first proportional flow valve is the same as that passing through the second proportional flow valve, to maintain the pressure in the baking chamber as the preset pressure.
Preferably, the nitrogen gas pipeline connected to the first intake port is furthe[ 502876 arranged with a hot air gun, and the hot air gun is used for preheating nitrogen gas about to enter the baking chamber.
Preferably, the device further includes a pressure relief valve communicated with the baking chamber, the pressure relief valve is used for timely releasing the pressure until the pressure in the baking chamber is lower than the preset pressure, causing the amount of nitrogen gas passing through the first proportional flow valve to be greater than that passing through the second proportional flow valve, and the pressure in the baking chamber to gradually reach the preset pressure; and the pressure relief valve is also used for releasing the pressure of the baking chamber when the pressure of the baking chamber is greater than the preset pressure.
Preferably, porous air outlet plates are arranged on the opposite left and right sides inside the baking chamber.
Preferably, the device further includes a cooling assembly for cooling the baked electrode coil of the battery cell before opening the sealing door.
Preferably, the cooling assembly is arranged below the baking chamber.
Preferably, the cooling assembly includes a second intake port and a second exhaust port for communicating the baking chamber, the second intake port and the second exhaust port being respectively located on opposite upper and lower sides inside the baking chamber, and also includes a blower, having an air outlet communicated with the second intake port, and an impeller entrance of the blower communicated with the second exhaust port to circulate nitrogen gas used for cooling the electrode coil of the battery cell in the baking chamber; and a condenser is arranged between the impeller entrance of the blower and the second exhaust port, and the condenser is used for cooling the nitrogen gas discharged from the second exhaust port.
The technical solutions provided by the present application may include the following beneficial effects:
The device continuously inputs clean nitrogen gas into the baking chamber and 502876 continuously discharges nitrogen gas to circulate the nitrogen gas in the baking chamber, and maintains the pressure in the baking chamber slightly greater than the external atmospheric pressure, so that the pressure in the baking chamber keeps a positive pressure state, thus changing the problems of high energy consumption and long baking time existing in the traditional baking device, and also solving the problems of material relaxation and even the risk of base material falling off caused by the traditional negative pressure baking device.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts.
FIG. 1 is a perspective view of an embodiment of the present invention;
FIG. 2 is a left side view of an embodiment of the present invention; and
FIG. 3 is an internal structural diagram of a baking chamber according to an embodiment of the present invention.
Reference numerals and denotations thereof. 11-baking chamber; 12-sealing door; 21-lever; 22-auxiliary arm; 23-drive cylinder; 24-frame body; 31-latch; 71-porous air outlet plate; 101-blower; and 102-condenser.
DETAILED DESCRIPTION LU602876
Embodiments will now be described with reference to the drawings. It is to be understood that, for simplicity and clarity of illustration, reference numerals may be repeated in the drawings to indicate corresponding or similar elements where deemed appropriate. In addition, the present invention sets forth many specific details to provide a thorough understanding of the embodiments described herein. However, those of ordinary skill in the art will appreciate that the embodiments described herein can be practiced without these specific details. In other instances, well-known methods, procedures and components have not been described in detail so as not to obscure the embodiments described herein. Moreover, this description is not to be construed as limiting the scope of the embodiments described herein.
Referring to FIGS. 1 to 3, an embodiment of the present invention provides a baking device for an electrode coil of a battery cell, including: a baking chamber 11, a sealing door 12 and a gas circulation assembly. The sealing door 12 is used for sealing an entrance and exit of an electrode coil of a battery cell of the baking chamber 11 when the electrode coil of the battery cell is baked; the gas circulation assembly is used for continuously inputting clean nitrogen gas into the baking chamber 11 through a first intake port, and continuously discharging the nitrogen gas through a first exhaust port to circulate the nitrogen gas in the baking chamber 11, the first intake port and the first exhaust port are respectively located on opposite left and right sides inside the baking chamber 11, the gas circulation assembly is also used for maintaining a pressure in the baking chamber 11 as a preset pressure, and the preset pressure is greater than an outside atmospheric pressure; and a heating pipe is arranged on a rear side wall of the baking chamber 11, and the heating pipe is used for heating nitrogen gas entering the baking chamber 11.
In the specific way in which the sealing door 12 seals the baking chamber 11 mentioned above, two sides of the sealing door 12 are hinged with levers 21 and auxiliary arms 22, the other end of each lever 21 is hinged to a telescopic end of a drive cylinder 23, a fixing end of the drive cylinder 23 is hinged to a frame body 24 of the device, and the other end of each auxiliary arm 22 is hinged to the frame body 24.
In the above embodiment, the device further includes latches 31 for locking th 1502876 sealing door 12 when the sealing door 12 seals the baking chamber 11. The arrangement of the latches 31, that is, after the levers 21 controlled by the drive cylinder 23 and the auxiliary arms 22 control the sealing door 12 to seal, the arrangement of the latches 31 further fixes the sealing door 12, improves the sealing effect, and at the same time provides safety guarantee to prevent air leakage caused by the gap between the baking chamber 11 and the sealing door 12 due to the positive pressure in the baking chamber 11.
In one embodiment, a first proportional flow valve is arranged on a nitrogen gas pipeline connected to the first intake port, and a second proportional flow valve is arranged on a nitrogen gas pipeline connected to the first exhaust port; and when the pressure in the baking chamber 11 is the preset pressure, the amount of nitrogen gas passing through the first proportional flow valve is the same as that passing through the second proportional flow valve, to maintain the pressure in the baking chamber 11 as the preset pressure.
It can be understood that in an initial state, the pressure in the baking chamber 11 is normal pressure, and the gas in the baking chamber 11 is replaced by introducing nitrogen gas at the first intake port, and during the replacement process, it is necessary to keep the first exhaust port to normally discharge nitrogen gas, and the amount of introduced nitrogen gas is the same as that of discharged nitrogen gas. After the gas replacement in the baking chamber 11 is completed, the amount of nitrogen gas passing through the first proportional flow valve is larger than that passing through the second proportional flow valve, and the pressure in the baking chamber 11 is gradually increased to a preset pressure. At this time, the preset pressure value is maintained only by making the amount of nitrogen gas passing through the first proportional flow valve and the amount of nitrogen gas passing through the second proportional flow valve the same, so that the positive pressure state in the baking chamber 11 is maintained.
In the above embodiment, the nitrogen gas pipeline connected to the first intake port is further arranged with a hot air gun, and the hot air gun is used for preheating nitrogen gas about to enter the baking chamber 11.
The preheating of nitrogen gas entering the baking chamber 11 reduces 12602876 temperature-rising time after the nitrogen gas enters the baking chamber 11, and helps to improve the baking efficiency of the electrode coil of the battery cell.
In one embodiment, the device further includes a pressure relief valve communicated with the baking chamber 11, the pressure relief valve is used for timely releasing the pressure until the pressure in the baking chamber 11 is lower than the preset pressure, causing the amount of nitrogen gas passing through the first proportional flow valve to be greater than that passing through the second proportional flow valve, and the pressure in the baking chamber 11 to gradually reach the preset pressure. A pressure value in the baking chamber 11 is made lower than the external air pressure after timely pressure relief, and then the pressure in the baking chamber 11 gradually reaches the preset pressure by controlling the incoming amount of nitrogen gas to be larger than the discharging amount, which helps to carry out the baking moisture out of the baking chamber 11 by discharging the nitrogen gas.
In addition, when the pressure of the baking chamber 11 is greater than the preset pressure, the pressure relief valve is also used for relieving the pressure of the baking chamber 11 to improve the safety of the use of the device.
In another embodiment, porous air outlet plates 71 are arranged on the opposite left and right sides inside the baking chamber 11. The function of providing the porous air outlet plate 71 is to allow nitrogen gas to enter the baking chamber 11 and then spread throughout the baking chamber 11, thereby improving the uniformity of the nitrogen gas passing through the electrode coil of the battery cell and improving the baking effect.
In yet another embodiment, the device further includes a cooling assembly for cooling the baked electrode coil of the battery cell before opening the sealing door 12.
In the above-described embodiment, the cooling assembly is arranged below the baking chamber 11. Since an air duct for cooling is easy to generate condensed water during the cooling process of the electrode coil of the battery cell after the baking is completed, the air duct is arranged below the baking chamber 11 to prevent the condensed water from flowing to the baking chamber 11, thereby avoiding affecting the baked electrode coil of the battery cell.
Specifically, in one embodiment, the cooling assembly includes a second intake Part 502876 and a second exhaust port for communicating the baking chamber 11, the second intake port and the second exhaust port being respectively located on opposite upper and lower sides inside the baking chamber 11, and also includes a blower 101, having an air outlet communicated with the second intake port, and an impeller entrance of the blower 101 communicated with the second exhaust port to circulate nitrogen gas used for cooling the electrode coil of the battery cell in the baking chamber 11; and a condenser 102 is arranged between the impeller entrance of the blower 101 and the second exhaust port, and the condenser 102 is used for cooling the nitrogen gas discharged from the second exhaust port. Since the cold air is heavy and the hot air is light, the second intake port is arranged on an upper side of the baking chamber 11, and the second exhaust port is arranged on a lower side of the baking chamber 11.
The aforementioned cooling air duct is used for connecting the air outlet of the blower 101 and the second intake port, the air duct is also used for connecting the second exhaust port and the impeller entrance of the blower 101, and the condenser 102 is arranged on a circuit of the air duct.
It is to be understood that the possible terms "first" or "second" and the like in the claims, specification, and drawings disclosed in the present invention are used to distinguish different objects, and are not used to describe a specific order. The terms “including” and "containing" as used in the specification and claims disclosed herein indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or collections thereof.
It is also to be understood that the terminology used in the present disclosure specification is for the purpose of describing particular embodiments only, and is not intended to limit the disclosure of the present disclosure. As used in the present disclosure specification and claims, singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly dictates otherwise. It is to be further understood that the term "and/or" as used in the present disclosure specification and claims refers to and includes any combination and all possible combinations of one or more of the associated listed items.
Although the embodiment of the present invention is as described above, th8 502876 contents are only embodiments adopted to facilitate the understanding of the present invention, and are not used to limit the scope and application scenarios of the present invention.
Any skilled person in the technical field mentioned in this present invention can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this present invention, but the patent protection scope of the present invention must still be subject to the scope defined by the attached claims.

Claims (10)

CLAIMS LU602876
1. A baking device for an electrode coil of a battery cell, comprising: a baking chamber (11), a sealing door (12) and a gas circulation assembly, wherein the sealing door (12) is used for sealing an entrance and exit of an electrode coil of a battery cell of the baking chamber (11) when the electrode coil of the battery cell is baked; the gas circulation assembly is used for continuously inputting clean nitrogen gas into the baking chamber (11) through a first intake port, and continuously discharging the nitrogen gas through a first exhaust port to circulate the nitrogen gas in the baking chamber (11), the first intake port and the first exhaust port are respectively located on opposite left and right sides inside the baking chamber (11), the gas circulation assembly is also used for maintaining a pressure in the baking chamber (11) as a preset pressure, and the preset pressure is greater than an outside atmospheric pressure; and a heating pipe is arranged on a rear side wall of the baking chamber (11), and the heating pipe is used for heating nitrogen gas entering the baking chamber (11).
2. The baking device for an electrode coil of a battery cell according to claim 1, wherein two sides of the sealing door (12) are hinged with levers (21) and auxiliary arms (22), the other end of each lever (21) is hinged to a telescopic end of a drive cylinder (23), a fixing end of the drive cylinder (23) is hinged to a frame body (24) of the device, and the other end of each auxiliary arm (22) is hinged to the frame body (24).
3. The baking device for an electrode coil of a battery cell according to claim 2, further comprising latches (31) for locking the sealing door (12) when the sealing door (12) seals the baking chamber (11).
4. The baking device for an electrode coil of a battery cell according to claim lu602876 wherein a first proportional flow valve is arranged on a nitrogen gas pipeline connected to the first intake port, and a second proportional flow valve is arranged on a nitrogen gas pipeline connected to the first exhaust port, and when the pressure in the baking chamber (11) is the preset pressure, the amount of nitrogen gas passing through the first proportional flow valve is the same as that passing through the second proportional flow valve, to maintain the pressure in the baking chamber (11) as the preset pressure.
5. The baking device for an electrode coil of a battery cell according to claim 4, wherein the nitrogen gas pipeline connected to the first intake port is further arranged with a hot air gun, and the hot air gun is used for preheating nitrogen gas about to enter the baking chamber (11).
6. The baking device for an electrode coil of a battery cell according to claim 4, further comprising a pressure relief valve communicated with the baking chamber (11), wherein the pressure relief valve is used for timely releasing the pressure until the pressure in the baking chamber (11) is lower than the preset pressure, causing the amount of nitrogen gas passing through the first proportional flow valve to be greater than that passing through the second proportional flow valve, and the pressure in the baking chamber (11) to gradually reach the preset pressure; and the pressure relief valve is also used for releasing the pressure of the baking chamber (11) when the pressure of the baking chamber (11) is greater than the preset pressure.
7. The baking device for an electrode coil of a battery cell according to claim 1, wherein porous air outlet plates (71) are arranged on the opposite left and right sides inside the baking chamber (11).
8. The baking device for an electrode coil of a battery cell according to claim 1, further comprising a cooling assembly for cooling the baked electrode coil of the battery cell before opening the sealing door (12).
9. The baking device for an electrode coil of a battery cell according to claim Bus02876 wherein the cooling assembly is arranged below the baking chamber (11).
10. The baking device for an electrode coil of a battery cell according to claim 9, wherein the cooling assembly comprises a second intake port and a second exhaust port for communicating the baking chamber (11), the second intake port and the second exhaust port being respectively located on opposite upper and lower sides inside the baking chamber (11), and also comprises a blower (101), having an air outlet communicated with the second intake port, and an impeller entrance of the blower (101) communicated with the second exhaust port to circulate nitrogen gas used for cooling the electrode coil of the battery cell in the baking chamber (11); and a condenser (102) is arranged between the impeller entrance of the blower (101) and the second exhaust port, and the condenser (102) is used for cooling the nitrogen gas discharged from the second exhaust port.
LU602876A 2025-08-12 2025-08-12 Baking device for electrode coil of battery cell LU602876B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
LU602876A LU602876B1 (en) 2025-08-12 2025-08-12 Baking device for electrode coil of battery cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU602876A LU602876B1 (en) 2025-08-12 2025-08-12 Baking device for electrode coil of battery cell

Publications (1)

Publication Number Publication Date
LU602876B1 true LU602876B1 (en) 2026-02-12

Family

ID=98772536

Family Applications (1)

Application Number Title Priority Date Filing Date
LU602876A LU602876B1 (en) 2025-08-12 2025-08-12 Baking device for electrode coil of battery cell

Country Status (1)

Country Link
LU (1) LU602876B1 (en)

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