Low-temperature cooling device for negative electrode material of lithium ion battery

Abstract

The utility model discloses a low-temperature cooling device for a negative electrode material of a lithium ion battery, and belongs to the technical field of lithium ion batteries. Comprising a shell, a conveying mechanism is arranged in the shell, a plurality of semiconductor chilling plates are arranged above the conveying mechanism, a charging barrel with the lower end gradually flattened is arranged above one end of the conveying mechanism, a drawing type material box is arranged below the other end of the conveying mechanism, and an inert gas bottle for inflating the charging barrel and the shell is arranged above the shell; the shell, the charging barrel and the material box form a whole with the closed interior in the running state of the device, the charging barrel with the gradually-flat lower end is arranged, so that a negative electrode material in the charging barrel can be flatly laid on the conveying mechanism when the conveying mechanism runs, and then the negative electrode material is conveyed into the material box after being uniformly cooled by the semiconductor chilling plate; and during operation, the inert gas bottle can enable the device to be filled with inert gas, so that the negative electrode material can be prevented from reacting with oxygen to form oxide, and the electrochemical performance is not influenced.

Description

Technical Field

[0001] The utility model provides a low-temperature cooling device for the negative electrode material of a lithium-ion battery, belonging to the technical field of lithium-ion batteries. Background Technique

[0002] A lithium-ion battery is an advanced rechargeable battery technology. It realizes the storage and release of electrical energy through the insertion and extraction process of lithium ions between the positive and negative electrode materials. The positive electrode is usually composed of lithium metal oxide, and the negative electrode uses graphite material. The two are separated by an electrolyte and a separator, allowing lithium ions to shuttle freely without short circuit. During charging, lithium ions migrate from the positive electrode to the negative electrode and store energy; during discharging, lithium ions return to the positive electrode to release energy for use. With its characteristics of high energy density, long cycle life, and no memory effect, lithium-ion batteries have become the preferred energy source in portable electronic devices, electric vehicles, and energy storage systems, playing a revolutionary role in the mobility and sustainable development of modern society.

[0003] Currently, in order to make the lattice structure of the negative electrode material of lithium-ion batteries more perfect and improve the crystallinity of the material, calcination is required, and after calcination, cooling is needed. The current cooling method is to adjust the temperature in the calcination furnace. However, since the negative electrode materials are all placed in a container, during cooling, the cooling effects of the negative electrode materials at different positions are different, and the temperature difference is relatively large. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that after the negative electrode material of the lithium-ion battery is calcined, the cooling effects of the negative electrode materials at different positions are different, and the temperature difference is relatively large.

[0005] In order to solve the above problems, the technical solution proposed by the utility model is: a low-temperature cooling device for the negative electrode material of a lithium-ion battery, including a housing. Inside the housing, a conveying mechanism is provided. Above the conveying mechanism, several semiconductor refrigeration chips are provided. Above one end of the conveying mechanism, there is a material cylinder with a gradually flattened lower end. Below the other end of the conveying mechanism, there is a pull-out material box. Above the housing, there is an inert gas cylinder for inflating the material cylinder and the inside of the housing. The housing, the material cylinder, and the material box form a closed whole inside during the operation of the device.

[0006] As an improvement, the conveying mechanism includes rotating rollers arranged on both sides of the housing, a conveyor belt sleeved on the two rotating rollers, and a motor arranged on one side of the housing and whose output shaft passes through the housing and is key-connected to one of the rotating rollers;

[0007] As an improvement, the upper end of the material cylinder is provided with a cover plate, and the width of the lower end of the material cylinder is smaller than the width of the conveyor belt;

[0008] As an improvement, one side of the material box is provided with a handle, the width inside the material box is greater than the width of the conveyor belt, and the end of the conveyor belt is located in the middle of the material box;

[0009] As an improvement, a gas cylinder placement rack for placing an inert gas cylinder is provided at the upper end of the outer shell;

[0010] As an improvement, a temperature sensor with a display screen for monitoring the temperature inside the outer shell is provided in the upper middle part of one side of the outer shell;

[0011] As an improvement, an observation window for observing the conveyor belt is provided on one side of the outer shell.

[0012] Advantages of the utility model:

[0013] By providing a barrel with a gradually flattened lower end, the negative electrode material in the barrel can be laid flat on the conveying mechanism when the conveying mechanism operates, and then evenly cooled by a semiconductor refrigerating sheet and conveyed into the material box. And when operating, the inert gas cylinder will fill the inside of the device with inert gas, which can avoid the negative electrode material reacting with oxygen to form oxides and affecting the electrochemical performance. Description of the drawings

[0014] Figure 1 is a schematic structural diagram of a low-temperature cooling device for a negative electrode material of a lithium-ion battery of the present utility model Figure 1 .

[0015] Figure 2 is a schematic structural diagram of a low-temperature cooling device for a negative electrode material of a lithium-ion battery of the present utility model Figure 2 .

[0016] Figure 3 is a schematic diagram of the internal structure of the outer shell of a low-temperature cooling device for a negative electrode material of a lithium-ion battery of the present utility model.

[0017] Figure 4 is a schematic diagram when the cover plate of a low-temperature cooling device for a negative electrode material of a lithium-ion battery of the present utility model is lifted and the material box is pulled out.

[0018] 1. Outer shell; 101. Observation window; 2. Conveying mechanism; 201. Roller; 202. Conveyor belt; 203. Motor; 3. Semiconductor refrigerating sheet; 4. Barrel; 401. Cover plate; 5. Material box; 501. Handle; 6. Inert gas cylinder; 601. Gas cylinder placement rack; 7. Temperature sensor. Detailed implementation manners

[0019] The present utility model will be further described below with reference to the drawings.

[0020] According to Figure 1As shown in Figure 4, the present utility model provides a low-temperature cooling device for a negative electrode material of a lithium-ion battery, which includes a housing 1. Inside the housing 1, a conveying mechanism 2 is provided. Above the conveying mechanism 2, a number of semiconductor refrigeration chips 3 are provided. Above one end of the conveying mechanism 2, there is a material cylinder 4 with a gradually flattened lower end. Below the other end of the conveying mechanism 2, there is a pull-out material box 5. Above the housing 1, there is an inert gas cylinder 6 for inflating inert gas into the material cylinder 4 and the inside of the housing 1. The housing 1, the material cylinder 4, and the material box 5 form an internally sealed whole during the operation of the device. At the upper end of the housing 1, there is a gas cylinder placement rack 601 for placing the inert gas cylinder 6. In the upper middle part of one side of the housing 1, there is a temperature sensor 7 with a display screen for monitoring the temperature inside the housing 1. On one side of the housing 1, there is an observation window 101 through which the conveyor belt 202 can be observed. By setting the material cylinder 4 with a gradually flattened lower end, the negative electrode material in the material cylinder 4 can be laid flat on the conveying mechanism 2 when the conveying mechanism 2 is running, and then evenly cooled by the semiconductor refrigeration chips 3 and conveyed into the material box 5. And during operation, the inert gas cylinder 6 will fill the inside of the device with inert gas, which can prevent the negative electrode material from reacting with oxygen to form oxides and affecting the electrochemical performance.

[0021] According to Figure 2 As shown: The conveying mechanism 2 includes roller shafts 201 arranged on both sides of the housing 1, a conveyor belt 202 sleeved on the two roller shafts 201, and a motor 203 arranged on one side of the housing 1 and whose output shaft passes through the housing 1 and is key-connected to one of the roller shafts 201. In this way, the motor 203 can drive one of the roller shafts 201 to rotate, thereby driving the conveyor belt 202 to move.

[0022] According to Figure 1 、 3 As shown: At the upper end of the material cylinder 4, there is a cover plate 401, and the width of the lower end of the material cylinder 4 is smaller than the width of the conveyor belt 202. In this way, the material flowing out of the material cylinder 4 can all be laid flat on the conveyor belt 202.

[0023] According to Figure 1 、 3 As shown: On one side of the material box 5, there is a handle 501. The width inside the material box 5 is greater than the width of the conveyor belt 202, and the end of the conveyor belt 202 is located in the middle of the material box 5. In this way, the material box 5 can collect the negative electrode material falling from the conveyor belt 202.

[0024] Principle of the present utility model: During use, first open the valve of the inert gas cylinder 6 to fill the interior of the device with inert gas. Then, turn on the motor 203 and the semiconductor refrigeration sheet 3. The motor 203 drives the roller 201 to rotate, causing the conveyor belt 202 to move. Observe the temperature of the semiconductor refrigeration sheet 3 through the temperature sensor 7. When the temperature reaches the required value, lift the cover plate 401, and then quickly take out the calcined negative electrode material from the calcining furnace and pour it into the material cylinder 4. Then, cover the cover plate 401 again and close the valve of the inert gas cylinder 6. The negative electrode material passes through the lower end of the material cylinder 4 and then spreads out on the conveyor belt 202. The spread negative electrode material can be quickly cooled with a small temperature difference. The cooled negative electrode material falls into the material box 5 and is collected together. When in use, take out the material box 5 through the handle 501 and quickly seal the material box 5. When in use, take out the material from the material box 5.

[0025] The present utility model and its implementation manners have been described above. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present utility model, design similar structural modes and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present utility model.

Claims

1. A low temperature cooling device for negative electrode materials of lithium ion batteries; characterized in that: The invention comprises an outer shell (1), wherein a conveying mechanism (2) is arranged inside the outer shell (1), a plurality of semiconductor cooling plates (3) are arranged above the conveying mechanism (2), a barrel (4) whose lower end is gradually flattened is arranged above one end of the conveying mechanism (2), a pull-out material box (5) is arranged below the other end of the conveying mechanism (2), an inert gas bottle (6) for inflating the barrel (4) and the outer shell (1) is arranged above the outer shell (1), and the outer shell (1), the barrel (4) and the material box (5) form an internally sealed whole when the device is in operation.

2. A low temperature cooling device for negative electrode materials of lithium ion batteries according to claim 1, characterized in that: The conveying mechanism (2) comprises rollers (201) arranged on both sides of the housing (1), a conveyor belt (202) sleeved on the two rollers (201), and a motor (203) arranged on one side of the housing (1) and having an output shaft passing through the housing (1) and key-connected to one of the rollers (201).

3. A low temperature cooling device for negative electrode materials of lithium ion batteries according to claim 2, characterized in that: The upper end of the barrel (4) is provided with a cover plate (401), and the width of the lower end of the barrel (4) is smaller than the width of the conveyor belt (202).

4. A low temperature cooling device for negative electrode materials of lithium ion batteries according to claim 2, characterized in that: A handle (501) is provided on one side of the material box (5), the width of the interior of the material box (5) is greater than the width of the conveyor belt (202), and the end of the conveyor belt (202) is located in the middle of the material box (5).

5. The low temperature cooling device for negative electrode material of lithium ion battery according to claim 1, characterized in that: The upper end of the housing (1) is provided with a gas cylinder placement rack (601) for placing an inert gas cylinder (6).

6. A low temperature cooling device for negative electrode materials of lithium ion batteries according to claim 1, characterized in that: A temperature sensor (7) with a display screen for monitoring the internal temperature of the casing (1) is provided at the upper middle portion of one side of the casing (1).

7. A low temperature cooling device for negative electrode materials of lithium ion batteries according to claim 2, characterized in that: An observation window (101) capable of observing the conveyor belt (202) is provided on one side of the housing (1).

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