Sealing pin for pressure monitoring in battery production
By using sealed pins that can be used for pressure monitoring in battery production with a simple structure in battery production, combined with battery cell injection pressure detection pins and pressure sensors, the problem of difficult to monitor the static infiltration effect after battery injection is solved, and intuitive judgment of the battery infiltration effect and efficient production are achieved.
Patent Information
- Application Number
- CN202421557117.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During the battery production process, it is difficult for the prior art to effectively monitor and determine the effect of standing infiltration after battery injection, resulting in some batteries being infiltrated under the standards, which leads to poor results.
Design a sealed pin that can be used for pressure monitoring in battery production with a simple structure, indirect feedback absorption state, intuitive quantification of internal pressure, and convenient installation. The combination of the pin and pressure sensor of the battery cell is used to indirectly detect the absorption state of the electrolyte inside the battery cell.
The intuitive judgment of the battery's static infiltration effect is achieved, and the secondary rehydration caused by the discharge of the sealed pin is avoided, which improves production efficiency and product quality.
Smart Images
Figure CN222687290U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of battery production tools, and in particular relates to a sealing pin which can be used for pressure monitoring in battery production. Background Art
[0002] In the battery production process, after the injection process of square batteries and cylindrical batteries, in order to allow the electrolyte to fully infiltrate the pole pieces, the batteries need to be left to stand after injection. After standing for an appropriate period of time, the electrolyte completely infiltrates the pole pieces, and then the battery formation and post-processing are carried out; in the actual production process, due to the pursuit of battery performance or battery specifications, the pole pieces in the battery are compacted to a greater extent, and the gap between the bare battery cell and the external shell is smaller, which makes the injection process to ensure smooth electrolyte injection. The negative pressure circulation method of the sealing cover is adopted for injection; after the injection is completed, the injection port is immediately sealed with a sealing pin to prevent leakage of the electrolyte. After the battery is left to stand for a period of time, part of the free electrolyte in the battery infiltrates the pole pieces, and part is free between the gap between the bare battery cell and the shell, and will no longer leak out. , thereby pulling out the sealing pin and carrying out the subsequent process; the normal battery needs to be left standing for 1 to 3 days after filling, and when the battery design is changed, due to the compaction of the pole piece, the gap between the bare battery cell and the shell, the infiltration ability of the electrolyte itself or the absorption ability of the main material, the required standing time varies greatly, and even the same batch of batteries with the same specifications will vary due to fluctuations in equipment process capabilities. At present, it can only be determined whether the infiltration is sufficient by spot checking the battery cells after standing. This causes some batteries that do not meet the infiltration standards to enter the subsequent process, which will lead to defects; therefore, it is very necessary to provide a sealing pin that can be used for pressure monitoring in battery production, which has a simple structure, indirect feedback of the absorption state, intuitive quantification of the internal pressure, and convenient installation. Summary of the invention
[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a sealing pin which can be used for pressure monitoring in battery production and has a simple structure, indirect feedback of absorption status, intuitive quantification of internal pressure, and convenient installation.
[0004] The purpose of the utility model is achieved as follows: a sealing pin that can be used for pressure monitoring in battery production, which includes a battery cell and a battery cell injection pressure detection pin, a rubber plug is arranged on one side of the top of the battery cell, the rubber plug is connected to the battery cell in a detachable plug-in installation manner, a battery cell injection pressure detection pin is arranged inside the rubber plug, the battery cell injection pressure detection pin is connected to the rubber plug in a detachable plug-in installation manner, and one end of the battery cell injection pressure detection pin extends out of the rubber plug, and the other end penetrates the rubber plug and extends into the battery cell.
[0005] The battery core comprises a battery core body, and a liquid injection port is provided on one side of the top of the battery core body.
[0006] The rubber plug comprises an upper plug body, a middle plug body and a lower plug body. The upper plug body is a cylindrical structure with a groove formed inside, and the lower plug body is a boss structure. The lower plug body is plugged and matched with the liquid injection port.
[0007] The upper plug body, the middle plug body and the lower plug body are an integrally formed structure, and a through hole penetrating the upper plug body, the middle plug body and the lower plug body is arranged inside the rubber plug.
[0008] The battery cell injection pressure detection pin comprises a sealing pin body, a pressure sensor is arranged inside the sealing pin body, and the pressure sensor is connected to the sealing pin body through a set of connecting bolts.
[0009] Both ends of the pressure sensor extend out of the sealing pin body, one end of the pressure sensor is provided with a mounting plate, the other end is provided with a pressure sensing port, and an instrument panel is installed on the mounting plate.
[0010] The battery core liquid injection pressure detection pin is plugged into the through hole, and the pressure sensing port passes through the through hole and the liquid injection port extends into the battery core.
[0011] The beneficial effects of the utility model are as follows: the utility model is a sealing pin that can be used for pressure monitoring in battery production, which mainly solves the problem of determining the static infiltration effect after battery liquid injection. The battery liquid injection pressure detection pin is mainly composed of a sealing pin body, a pressure sensor, an instrument panel and a pressure sensing port. In use, the battery liquid injection pressure detection pin is inserted into the through hole in the rubber plug of the battery after liquid injection, and the pressure sensing port extends into the battery. The pressure inside the battery is sensed through the pressure sensing port at the bottom of the pressure sensor. As the electrolyte is absorbed by the electrode, the internal pressure of the battery is reduced, thereby detecting the pressure inside the battery through the instrument panel. The pressure display on the dial feeds back the absorption status of the electrolyte by the battery cell; the utility model uses a pressure sensor to indirectly detect the absorption status of the electrolyte inside the battery cell; the pressure sensor has a digital display, which can intuitively quantify the internal pressure; the product specifications of the battery cell injection pressure detection pin of the utility model are the same as the existing sealing pin and can be used directly; the utility model can intuitively determine whether the static infiltration effect meets the standard, and there is no need to worry about secondary fluid replenishment caused by overflow after pulling out the sealing pin; the utility model has the advantages of simple structure, indirect feedback of absorption status, intuitive quantification of internal pressure, and easy installation. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the use state of the utility model.
[0013] Figure 2 It is a schematic diagram of the structure of the battery cell of the utility model.
[0014] Figure 3 It is a structural schematic diagram of the rubber plug of the utility model.
[0015] Figure 4 It is a structural schematic diagram of the battery core injection pressure detection pin of the utility model.
[0016] In the figure: 1, battery cell 11, battery cell body 12, liquid injection port 2, rubber plug 21, upper plug body 22, middle plug body 23, lower plug body 24, through hole 3, battery cell liquid injection pressure detection pin 31, sealing pin body 32, pressure sensor 33, connecting bolt 34, mounting plate 35, instrument panel 36, pressure sensing port. DETAILED DESCRIPTION
[0017] The utility model is further described below in conjunction with the accompanying drawings. Example
[0018] like Figure 1-4 As shown, a sealing pin that can be used for pressure monitoring in battery production includes a battery cell 1 and a battery cell injection pressure detection pin 3. A rubber plug 2 is provided on one side of the top of the battery cell 1, and the rubber plug 2 is connected to the battery cell 1 in a detachable plug-in installation manner. The battery cell injection pressure detection pin 3 is provided inside the rubber plug 2, and the battery cell injection pressure detection pin 3 is connected to the rubber plug 2 in a detachable plug-in installation manner, and one end of the battery cell injection pressure detection pin 3 extends out of the rubber plug 2, and the other end penetrates the rubber plug 2 and extends into the battery cell 1.
[0019] The utility model discloses a sealing pin which can be used for pressure monitoring in battery production, and mainly solves the problem of determining the static infiltration effect after battery liquid injection. The battery liquid injection pressure detection pin 3 is mainly composed of a sealing pin body 31, a pressure sensor 32, an instrument panel 35 and a pressure sensing port 36. In use, the battery liquid injection pressure detection pin 3 is inserted into the through hole 24 in the rubber plug 2 of the battery cell 1 after liquid injection, and the pressure sensing port 36 extends into the battery cell 1. The pressure inside the battery cell 1 is sensed through the pressure sensing port 36 at the bottom of the pressure sensor 32. As the electrolyte is absorbed by the pole piece, the internal pressure of the battery cell 1 is reduced, thereby The pressure display on the instrument panel 35 feeds back the absorption status of the electrolyte by the battery cell 1; the utility model uses a pressure sensor 32 to indirectly detect and feed back the absorption status of the electrolyte inside the battery cell 1; the pressure sensor 32 has a digital display, which can intuitively quantify the internal pressure; the product specifications of the battery cell injection pressure detection pin 3 of the utility model are the same as the existing sealing pin and can be used directly; the utility model can intuitively determine whether the static infiltration effect is up to standard, and there is no need to worry about secondary fluid replenishment caused by overflow after pulling out the sealing pin; the utility model has the advantages of simple structure, indirect feedback of absorption status, intuitive quantification of internal pressure, and easy installation. Example
[0020] like Figure 1-4As shown, a sealing pin that can be used for pressure monitoring in battery production includes a battery cell 1 and a battery cell injection pressure detection pin 3. A rubber plug 2 is provided on one side of the top of the battery cell 1, and the rubber plug 2 is connected to the battery cell 1 in a detachable plug-in installation manner. The battery cell injection pressure detection pin 3 is provided inside the rubber plug 2, and the battery cell injection pressure detection pin 3 is connected to the rubber plug 2 in a detachable plug-in installation manner, and one end of the battery cell injection pressure detection pin 3 extends out of the rubber plug 2, and the other end penetrates the rubber plug 2 and extends into the battery cell 1.
[0021] The battery cell 1 includes a battery cell body 11 , and a liquid injection port 12 is opened on one side of the top of the battery cell body 11 .
[0022] The rubber plug 2 includes an upper plug body 21 , a middle plug body 22 and a lower plug body 23 . The upper plug body 21 is a cylindrical structure with a groove formed inside. The lower plug body 23 is a boss structure. The lower plug body 23 is plugged into and matched with the liquid injection port 12 .
[0023] The upper plug body 21 , the middle plug body 22 and the lower plug body 23 are an integrally formed structure, and a through hole 24 penetrating the upper plug body 21 , the middle plug body 22 and the lower plug body 23 is provided inside the rubber plug 2 .
[0024] The battery cell injection pressure detection pin 3 comprises a sealing pin body 31 , a pressure sensor 32 is arranged inside the sealing pin body 31 , and the pressure sensor 32 is connected to the sealing pin body 31 via a set of connecting bolts 33 .
[0025] Both ends of the pressure sensor 32 extend out of the sealing pin body 31 . A mounting plate 34 is disposed at one end of the pressure sensor 32 , and a pressure sensing port 36 is disposed at the other end. A dashboard 35 is mounted on the mounting plate 34 .
[0026] The battery cell injection pressure detection pin 3 is plugged into the through hole 24 , and the pressure sensing port 36 penetrates through the through hole 24 and the injection port 12 and extends into the battery cell 1 .
[0027] The utility model discloses a sealing pin which can be used for pressure monitoring in battery production, and mainly solves the problem of determining the static infiltration effect after battery liquid injection. The battery liquid injection pressure detection pin 3 is mainly composed of a sealing pin body 31, a pressure sensor 32, an instrument panel 35 and a pressure sensing port 36. In use, the battery liquid injection pressure detection pin 3 is inserted into the through hole 24 in the rubber plug 2 of the battery cell 1 after liquid injection, and the pressure sensing port 36 extends into the battery cell 1. The pressure inside the battery cell 1 is sensed through the pressure sensing port 36 at the bottom of the pressure sensor 32. As the electrolyte is absorbed by the pole piece, the internal pressure of the battery cell 1 is reduced, thereby The pressure display on the instrument panel 35 feeds back the absorption status of the electrolyte by the battery cell 1; the utility model uses a pressure sensor 32 to indirectly detect and feed back the absorption status of the electrolyte inside the battery cell 1; the pressure sensor 32 has a digital display, which can intuitively quantify the internal pressure; the product specifications of the battery cell injection pressure detection pin 3 of the utility model are the same as the existing sealing pin and can be used directly; the utility model can intuitively determine whether the static infiltration effect is up to standard, and there is no need to worry about secondary fluid replenishment caused by overflow after pulling out the sealing pin; the utility model has the advantages of simple structure, indirect feedback of absorption status, intuitive quantification of internal pressure, and easy installation.
Claims
1. A sealing pin for pressure monitoring in battery production, comprising a battery cell and a battery cell injection pressure detection pin, characterized in that: A rubber plug is provided on one side of the top of the battery cell, and the rubber plug is connected to the battery cell in a detachable plug-in installation manner. A battery cell injection pressure detection pin is provided inside the rubber plug, and the battery cell injection pressure detection pin is connected to the rubber plug in a detachable plug-in installation manner, and one end of the battery cell injection pressure detection pin extends out of the rubber plug, and the other end penetrates the rubber plug and extends into the battery cell.
2. A sealing pin for pressure monitoring in battery production according to claim 1, characterized in that: The battery core comprises a battery core body, and a liquid injection port is provided on one side of the top of the battery core body.
3. A sealing pin for pressure monitoring in battery production according to claim 2, characterized in that: The rubber plug comprises an upper plug body, a middle plug body and a lower plug body. The upper plug body is a cylindrical structure with a groove formed inside, and the lower plug body is a boss structure. The lower plug body is plugged and matched with the liquid injection port.
4. A sealing pin for pressure monitoring in battery production according to claim 3, characterized in that: The upper plug body, the middle plug body and the lower plug body are an integrally formed structure, and a through hole penetrating the upper plug body, the middle plug body and the lower plug body is arranged inside the rubber plug.
5. A sealing pin for pressure monitoring in battery production according to claim 4, characterized in that: The battery cell injection pressure detection pin comprises a sealing pin body, a pressure sensor is arranged inside the sealing pin body, and the pressure sensor is connected to the sealing pin body through a set of connecting bolts.
6. A sealing pin for pressure monitoring in battery production according to claim 5, characterized in that: Both ends of the pressure sensor extend out of the sealing pin body, one end of the pressure sensor is provided with a mounting plate, the other end is provided with a pressure sensing port, and an instrument panel is installed on the mounting plate.
7. A sealing pin for pressure monitoring in battery production according to claim 6, characterized in that: The battery core liquid injection pressure detection pin is plugged into the through hole, and the pressure sensing port passes through the through hole and the liquid injection port extends into the battery core.