Device capable of preventing corrosion during formation activation of battery opening

Abstract

The utility model discloses a device capable of preventing corrosion during formation activation of a battery opening. The device can effectively protect a formation cabinet. The formation cabinet comprises a positive pole fixing piece, a battery fixing clamp I, a battery fixing clamp II, a negative pole fixing piece, a positive pole aluminum sleeve, a negative pole aluminum sleeve, a positive pole column and a negative pole column; the first battery fixing clamp and the second battery fixing clamp are used for fixing a battery, the positive pole fixing piece is used for fixing a positive pole column, the negative pole fixing piece is used for fixing a negative pole column, the positive pole aluminum sleeve is clamped on the positive pole column, and the negative pole aluminum sleeve is clamped on the negative pole column. According to the utility model, the anti-corrosion aluminum sleeves are additionally arranged on the cabinet point clamp, and the sleeves are fixed on the positive electrode cabinet point and the negative electrode cabinet point of the formation cabinet, so that the electrolyte corrosion phenomenon can be effectively prevented; the utility model aims to block the corrosion condition of electrolyte, thereby blocking the corrosion phenomenon, reducing the cost and improving the efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to power / energy storage lithium ion battery processing technical field especially relates to a device that can prevent battery open formation activation from corrosion. BACKGROUND

[0002] The traditional battery open formation includes the following steps: starting formation activation battery, gas is generated in the battery, gas extrusion electrolyte emerges, electrolyte corrodes the battery and formation cabinet point, and the charging path is blocked.

[0003] Specifically, the battery in the traditional open formation cabinet is charged with the opening, and the gas generated in the battery during charging will press the electrolyte to emerge from the shell and cause the following two problems: ① the positive electrode end shell (with high voltage), electrolyte and formation cabinet point electrochemical corrosion, resulting in shell damage, ② electrolyte and cabinet point clamp contact chemical corrosion, resulting in open formation cabinet point blocking charging path and failure.

[0004] In order to solve the above problems, the utility model is proposed. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a device that can prevent battery open formation activation from corrosion.

[0006] The purpose of the utility model can be realized by the following technical scheme:

[0007] A device that can prevent battery open formation activation from corrosion, comprising a formation cabinet, the formation cabinet comprises a positive electrode fixing piece, a battery fixing clamp one, a battery fixing clamp two, a negative electrode fixing piece, a positive electrode aluminum sleeve, a negative electrode aluminum sleeve, a positive electrode column and a negative electrode column, the battery fixing clamp one and the battery fixing clamp two are used for fixing the battery, the positive electrode fixing piece is used for fixing the positive electrode column, the negative electrode fixing piece is used for fixing the negative electrode column, the positive electrode aluminum sleeve is clamped on the positive electrode column, and the negative electrode aluminum sleeve is clamped on the negative electrode column.

[0008] Preferably, the formation cabinet further comprises a base, a stand is arranged above the base, a fixing piece is arranged between the base and the stand, and the positive electrode fixing piece, the battery fixing clamp one, the battery fixing clamp two and the negative electrode fixing piece are sequentially arranged on one side of the stand from top to bottom.

[0009] Further, the positive electrode column further comprises a positive electrode sleeve, and the positive electrode column is fixed with the positive electrode fixing piece through the positive electrode sleeve.

[0010] Preferably, the negative electrode column further comprises a negative electrode sleeve, and the negative electrode is fixed with the negative electrode fixing piece through the negative electrode sleeve.

[0011] Further, the interior of the positive aluminum sleeve is a hole structure, the inner diameter of the hole structure is a stepped structure, the outer inner diameter of the hole structure is larger than the inner inner diameter, and the negative aluminum sleeve and the positive aluminum sleeve are the same structure.

[0012] Beneficial technical effects:

[0013] The utility model discloses a cabinet point clamp adds anticorrosive aluminum sleeve, and the sleeve is fixed on the positive and negative cabinet point of formation cabinet, which can effectively prevent electrolyte corrosion phenomenon; the utility model aims at breaking the corrosion condition of electrolyte, thereby breaking the occurrence of corrosion phenomenon and reducing cost and increasing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be further described below with reference to the drawings.

[0015] Figure 1 The utility model discloses a device structure schematic diagram for preventing corrosion when battery opening formation activation.

[0016] Figure 2 The utility model discloses a positive pole structure schematic diagram.

[0017] Figure 3 The utility model discloses a partial enlarged structure schematic diagram.

[0018] Figure 4 The utility model discloses a negative pole structure schematic diagram.

[0019] In the drawing, 1, positive pole; 2, positive aluminum sleeve; 3, battery; 4, base; 5, stand; 6, fixed part; 7, positive fixed part; 8, battery fixed clamp one; 9, battery fixed clamp two; 10, negative fixed part; 11, negative spring sleeve; 12, positive spring sleeve; 13, negative aluminum sleeve; 14, negative pole. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] REFERENCE Figures 1-4As shown, a device for preventing corrosion during the formation and activation of a battery opening includes a formation cabinet. The formation cabinet includes a positive electrode fixing component 7, a battery fixing clip 1 8, a battery fixing clip 2 9, a negative electrode fixing component 10, a positive electrode aluminum sleeve 2, a negative electrode aluminum sleeve 13, a positive electrode post 1, and a negative electrode post 14. The battery fixing clip 1 8 and the battery fixing clip 2 9 are used to fix the battery 3, the positive electrode fixing component 7 is used to fix the positive electrode post 1, the negative electrode fixing component 10 is used to fix the negative electrode post 14, the positive electrode aluminum sleeve 2 is clamped on the positive electrode post 1, and the negative electrode aluminum sleeve 13 is clamped on the negative electrode post 14.

[0022] The formation cabinet also includes a base 4, with a column 5 on top of the base 4. A fixing member 6 is provided between the base 4 and the column 5 for fixation. From top to bottom, a positive electrode fixing member 7, a battery fixing clip 1 8, a battery fixing clip 2 9, and a negative electrode fixing member 10 are arranged on one side of the column 5. The battery fixing clip 1 8 and the battery fixing clip 2 9 are used to clamp the main structure of the battery 3.

[0023] Battery 3 includes a positive electrode and a negative electrode. The positive electrode is in contact with the positive electrode post 1. A positive electrode aluminum sleeve 2 is installed below the positive electrode post 1. The positive electrode post 1 also includes a positive electrode spring sleeve 12. The positive electrode post 1 is fixed to the positive electrode fixing member 7 through the positive electrode spring sleeve 12. The negative electrode is in contact with the negative electrode post 14. A negative electrode aluminum sleeve 13 is installed above the negative electrode post 14. The negative electrode post 14 also includes a negative electrode spring sleeve 11. The negative electrode is fixed to the negative electrode fixing member 10 through the negative electrode spring sleeve 11.

[0024] The positive electrode aluminum sleeve 2 has a porous structure inside, and the inner diameter of the porous structure is stepped. The outer inner diameter 21 of the porous structure is larger than the inner inner diameter 22. The positive electrode aluminum sleeve 2 is fastened to the positive electrode post 1 through the stepped structure inside the positive electrode aluminum sleeve 2.

[0025] The negative electrode aluminum sleeve 13 and the positive electrode aluminum sleeve 2 have the same structure.

[0026] The following uses a 4680 battery as an example to illustrate the preparation methods of the positive and negative aluminum sleeves, as well as the working steps of the device that can prevent corrosion during the activation of the battery opening formation:

[0027] Step 1: Make an aluminum column with a diameter of 14mm and a height of 25mm;

[0028] Step 2: Fix the aluminum column on the lathe, control the cutting tool to drill a hole with a diameter of 12.8mm and a depth of 15mm, and drill another hole with a diameter of 12.5mm and a depth of 20mm.

[0029] Step 3: Remove burrs. The surfaces of the positive and negative aluminum sleeves should be flat. Inner circle 1 has an inner diameter of 12.85mm and a depth of 15.2mm, and inner circle 2 has an inner diameter of 12.52mm and a depth of 20.0mm.

[0030] Step 4: Connect the positive and negative aluminum sleeves to form the positive and negative terminals of the cabinet, and then tap them firmly with a hammer.

[0031] Step 5: Adjust the cabinet height; the distance between the cabinet points for 4680 batteries should be 76mm.

[0032] Step 6: Place the lithium-ion 4680 batteries that have been injected with electrolyte into the cabinet;

[0033] Step 7: Start the open-type formation process, using a charging current of 0.2C to maintain a constant current and voltage to 4200mV, with a charging cut-off current of 0.02C;

[0034] Step 8: Start the vacuum formation chamber, with a vacuum level of -0.5 MPa;

[0035] Step 9: After charging is complete, open the oven with the opening formed and observe whether the liquid leakage corrodes the cabinet.

[0036] Step 10: Check the voltage and resistance of the opened battery for abnormalities, and clean up any residual liquid;

[0037] Step 11: Seal the lithium battery 4680 with steel nails and wrap it with a protective film for preservation. Manufacturing is complete.

[0038] This invention prevents electrolyte corrosion by using positive and negative aluminum sleeves, making it simple, convenient, and practical. It solves the problem of electrolyte corrosion in lithium / sodium batteries caused by open-cell formation processes, effectively improving battery yield and extending the lifespan of the cabinet.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for preventing corrosion during the activation of a battery opening formation process, characterized in that, The device includes a formation cabinet, which includes a positive electrode fixing component (7), a battery fixing clip one (8), a battery fixing clip two (9), a negative electrode fixing component (10), a positive electrode aluminum sleeve (2), and a negative electrode aluminum sleeve (13). The battery fixing clip one (8) and the battery fixing clip two (9) are used to fix the battery (3), the positive electrode fixing component (7) is used to fix the positive electrode post (1), the negative electrode fixing component (10) is used to fix the negative electrode post (14), the positive electrode aluminum sleeve (2) is clamped on the positive electrode post (1), and the negative electrode aluminum sleeve (13) is clamped on the negative electrode post (14).

2. The device for preventing corrosion during battery opening formation activation according to claim 1, characterized in that, The formation cabinet also includes a base (4), a column (5) is provided above the base (4), and a fixing member (6) is provided between the base (4) and the column (5) for fixing. A positive electrode fixing member (7), a battery fixing clip one (8), a battery fixing clip two (9) and a negative electrode fixing member (10) are arranged sequentially from top to bottom on one side of the column (5).

3. The device for preventing corrosion during battery opening formation activation according to claim 2, characterized in that, The positive electrode post (1) also includes a positive electrode spring sleeve (12), and the positive electrode post (1) is fixed to the positive electrode fixing member (7) through the positive electrode spring sleeve (12).

4. The device according to claim 2 for preventing corrosion during battery opening formation activation, characterized in that, The negative electrode post (14) also includes a negative electrode spring sleeve (11), and the negative electrode is fixed to the negative electrode fixing member (10) through the negative electrode spring sleeve (11).

5. The device according to claim 4 for preventing corrosion during battery opening formation activation, characterized in that, The positive electrode aluminum sleeve (2) has a porous structure inside, and the inner diameter of the porous structure is a stepped structure. The outer inner diameter (21) of the porous structure is larger than the inner inner diameter (22). The negative electrode aluminum sleeve (13) and the positive electrode aluminum sleeve (2) have the same structure.

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