WO2020192164A1

WO2020192164A1 - Device for measuring sealing performance of pole column of energy-storing battery, and measurement method thereof

Info

Publication number: WO2020192164A1
Application number: PCT/CN2019/121402
Authority: WO
Inventors: 李军
Original assignee: 浙江天能电池(江苏)有限公司
Priority date: 2019-03-22
Filing date: 2019-11-28
Publication date: 2020-10-01
Also published as: CN109959488B; CN109959488A

Abstract

Provided are a device for measuring the sealing performance of a pole column of an energy-storing battery, and a measurement method thereof; a cylinder (2) connected to a control valve (12) is fixed on the lower crossbeam (301) of a bracket (3); a telescoping rod (201) of the cylinder (2) is oriented vertically upward, and a top platform (14) is arranged on the top of the telescoping rod (201); a sealing head (5) is fixed vertically downward at a position of an upper crossbeam (302) of the bracket (3) opposite to the top platform (14); the lower surface of the sealing head (5) is in communication with an air compression pump (7) by means of an air pipe (6); a pressure gauge (8) and a shut-off valve (9) also are mounted on the air pipe (6), and the shut-off valve (9) is located between the air compression pump (7) and the pressure gauge (8). The device and method can effectively test whether the quality of a sealant meets a standard; it is also possible to identify the actual cause of acid creep corrosion of a terminal, effectively solving the problem of acid creep corrosion, and reduce production costs.

Description

Device and method for detecting sealing performance of pole post of energy storage battery

Technical field

The invention relates to the field of battery manufacturing, in particular to a detection device and a detection method for the sealing performance of an energy storage battery pole.

Background technique

In the battery manufacturing process, the quality problem of the acid corrosion of the terminal often occurs. The acid corrosion of the terminal is caused by the incomplete sealing between the terminal and the terminal groove, which affects the sealing performance between the terminal and the terminal groove. The factor is the quality of the sealant used to seal the terminal groove and the terminal. Poor quality of the sealant will lead to poor bonding between the inner wall of the terminal groove and the outer wall of the terminal, making the seal between the two poor , Eventually lead to acid corrosion of the terminal; another reason that affects the sealing performance between the terminal and the terminal groove is due to the irregular operation of the staff, and the excessive screwing force during the charging process causes the sealant capillary phenomenon, and the sealant capillary phenomenon appears It will affect the sealing performance between the terminal and the terminal groove, resulting in defective products.

In the prior art, once the terminal has the problem of creeping acid corrosion, defective products will appear, and the high defective rate will seriously increase the production cost. Therefore, it is urgent to find a tool or method to test whether the sealant quality meets the standard. It is possible to find out the real cause of the acid corrosion of the terminal and correct it to avoid the problem from happening again.

Summary of the invention

Objective of the invention: In view of the problems in the prior art, the present invention provides an energy storage battery terminal sealing performance testing device and testing method thereof. The device and method can effectively test and determine whether the quality of the sealant meets the standard, and at the same time can find out The real reason for the corrosion of the terminals is to effectively solve the problem of the corrosion of the terminals and reduce the production cost.

Technical Solution: The present invention provides a device for detecting the sealing performance of the pole post of an energy storage battery. A cylinder connected with a control valve is fixed on the lower beam of the bracket, the telescopic rod of the cylinder is vertically upward, and the top of the telescopic rod is arranged The top platform; the upper beam of the bracket opposite to the top platform is fixed with a sealing head vertically downward, and the lower surface of the sealing head is in communication with a compressor through a gas pipe, and a pressure is also installed on the gas pipe A meter and a shut-off valve, the shut-off valve is located between the air compressor and the pressure gauge.

Further, a rubber nozzle is fixed on the lower surface of the sealing head, and the air outlet of the air pipe extends to the lower surface of the rubber nozzle. Since the rubber material has the performance of radial expansion under pressure, the gap between the sealing head and the terminal groove where the rubber nozzle is arranged under the sealing head is better sealed, which improves the detection reliability of the device.

The present invention also provides a method for detecting the sealing performance of battery poles, which includes the following steps: S1: install the terminal to be tested into the terminal slot of the middle cover, and connect the pole of the terminal to be tested with the terminal slot Seal with a sealing ring, and then use sealant to seal the pole and copper sheet of the terminal to be tested with the terminal groove to form an integral structure, wherein a part of the copper sheet extends outside the sealant; S2 : Turn the overall structure upside down, that is, place the copper sheet protruding out of the sealant downwards and the poles upwards, into the gap between the poles and the terminal groove Inject the detection liquid; S3: Place the inverted overall structure on the top platform, pull the control valve to raise the telescopic rod of the cylinder to the outer edge of the root of the terminal groove and the sealing head The lower surface is locked and sealed; S4: Manually press the compressor to inflate the space between the sealing head and the terminal groove through the air pipe, and close the pressure gauge after the pressure gauge reaches the preset value. The cut-off valve; S5: After the pressure is maintained for a preset time, open the cut-off valve, remove the overall mechanism, and observe whether there is any leakage of the detection liquid around the copper sheet of the terminal to be tested. If there is leakage, it can be determined The sealing performance of the sealant is poor, otherwise the sealing effect of the sealant is better.

Preferably, in the S4, the preset value is less than the top pressure of the cylinder, and the preset value is 15-40 kpa. The pressure applied from the upper end between the sealing head and the terminal groove should be less than the top pressure of the cylinder to ensure the accuracy of the test results.

Preferably, in the S5, the preset time is 50-80s.

Preferably, in the S3, before placing the overall structure upside down on the top table, the coloring paper is also laid flat on the top table. If the quality of the sealant is poor, under the action of the upper pressure, the detection liquid will go down from the space between the terminal slot and the sealing head, through the inner wall of the terminal slot and the sealant and/or between the sealant and the outer wall of the terminal. Leakage until the detection liquid leaks along the outer wall of the terminal to the color paper below. In this way, as long as there is detection liquid on the color paper, it can be judged that the seal between the terminal and the terminal groove is not good, and the quality of the sealant can also be judged. It's bad, the judgment is simple and convenient.

Preferably, the colored paper is rice paper.

Preferably, the detection liquid is black ink.

Beneficial effects: When the device detects the sealing performance between the terminal and the terminal groove, only the terminal and the terminal groove are sealed into an integral structure with a sealant, and then the overall structure is inverted, and the terminal groove and the pole post of the terminal Inject the test liquid into the gap between the two, and then place the inverted overall structure on the top platform, move the top platform to the terminal groove root outer edge of the overall structure and seal the sealing head through the cylinder, and then use the air compressor to seal the sealing head and The space between the terminal grooves is inflated and pressurized. After the pressure in the space reaches a certain value, if the sealant between the terminal and the terminal groove is well sealed, the pressure in the above space will not press the detection liquid into the pole The gap between the outer wall and the sealant, that is, the detection liquid will not leak from the gap between the outer wall of the copper sheet at the bottom of the terminal and the sealant; on the contrary, if the sealant between the terminal and the terminal groove is not properly sealed, the above The pressure in the space will press the detection liquid into the gap between the outer wall of the pole and the sealant, that is, the detection liquid will leak out from the gap between the outer wall of the copper sheet at the bottom of the terminal and the sealant; check whether the liquid has leaked by naked eyes Can get it.

It can be seen that the device has a simple structure, quick and convenient detection, and can detect the tightness of the sealant; at the same time, through the above detection methods, it can also simulate the internal creeping trajectory of the terminal to find the true cause of the creeping, and provide an effective guarantee for improving product quality.

Description of the drawings

Figure 1 is a schematic diagram of the structure of an energy storage battery terminal sealing performance testing device;

Figure 2 is a schematic diagram of the structure when the terminal to be tested is installed in the terminal slot and placed upright;

Figure 3 is a schematic diagram of the structure when the terminal to be tested is installed in the terminal slot and the testing liquid is injected upside down;

FIG. 4 is a schematic diagram of the structure when the sealing performance testing device of the pole post of the energy storage battery is used for testing the sealing performance of the terminal on the side.

detailed description

The present invention will be described in detail below in conjunction with the drawings.

Implementation mode 1:

This embodiment provides a device for detecting the sealing performance of an energy storage battery pole column, as shown in Figure 1, which is mainly composed of a cylinder 2, a bracket 3, a sealing head 5 and a pneumatic pump 7. The telescopic rod 201 of the cylinder 2 is fixed vertically upwards On the lower beam of the bracket 3, the cylinder 2 is connected with a control valve 12, and the top of the telescopic rod 201 of the cylinder 2 is provided with a top platform 14; the upper beam 302 of the bracket 3 is fixed vertically downward at a position opposite to the top platform 14 The sealing head 5, in order to improve the sealing performance of the sealing head 5, a rubber nozzle 11 is also fixed on the lower surface of the sealing head 5 on the lower surface of the sealing head 5. The air pipe 6 extends from the upper part of the sealing head 5 through its interior to its lower surface, And the outlet of the air pipe 6 extends to the lower surface of the rubber nozzle 11, that is, the lower surface of the rubber nozzle 11 communicates with the compressor 7 through the air pipe 6. A pressure gauge 8 and a shut-off valve 9 are also installed on the air pipe 6, and the shut-off valve 9 is located at the pressure Between the air pump 7 and the pressure gauge 8.

The test steps for testing the sealing of battery poles using this device are as follows:

S1: As shown in Figure 2, first install the terminal 1 to be tested into the terminal groove 401 of the middle cover 4, and seal the pole 101 of the terminal 1 to be tested and the terminal groove 401 with a sealing ring 402, and then use a sealant 13 Seal the pole 101 and the copper sheet 102 of the terminal 1 to be tested with the terminal groove 401 to form an integral structure, in which a part of the copper sheet 102 extends to the outside of the sealant 13;

S2: As shown in Figure 3, the overall structure is inverted, that is, the copper sheet 102 protruding outside the sealant 13 is placed downward and the pole 101 is upward, and the inspection is injected into the gap between the pole 101 and the terminal groove 401 Liquid 15; In the present invention, the detection liquid 15 can use black ink.

S3: Lay the color-developing paper 16 (rice paper can be used in the present invention) on the top platform. The color-developing paper 16 is provided with a through hole 1601 that just allows the copper sheet 102 to pass through, and the inverted overall structure is placed on the top platform 14. As shown in Figure 4, pass one end of the copper sheet 102 extending from the sealant 13 through the through hole 1601, pull the control valve 12 to raise the telescopic rod 201 of the cylinder 2 to the outer edge of the root of the terminal groove 401 and the rubber nozzle 11 The lower surface is locked and sealed;

S4: The hand compressed air pump 7, inflates the space between the rubber nozzle 11 and the terminal groove 401 through the air pipe 6, until the reading of the pressure gauge 8 reaches 15-40kpa, close the shut-off valve 9;

S5: After maintaining the pressure for 50-80s, open the shut-off valve 9, remove the overall mechanism, and observe whether there is any leakage of the detection liquid 15 around the copper sheet 102 of the terminal 1 to be tested or around the through hole 1601. If there is leakage, it can be judged to be sealed The sealing performance of the glue 13 is poor, otherwise the sealing effect of the sealant 13 is better.

The foregoing embodiments are only to illustrate the technical ideas and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement them accordingly, and cannot limit the scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

A testing device for the sealing performance of an energy storage battery pole, which is characterized in that a cylinder (2) connected with a control valve (12) is fixed on a lower beam (301) of a bracket (3), and the cylinder (2) is telescopic The rod (201) is vertically upward, and the top of the telescopic rod (201) is provided with a top platform (14); the upper beam (302) of the bracket (3) is positioned vertically opposite to the top platform (14) A sealing head (5) is fixed downward, and the lower surface of the sealing head (5) communicates with a compressor (7) through a gas pipe (6), and a pressure gauge (8) and A stop valve (9), the stop valve (9) is located between the air compressor (7) and the pressure gauge (8).
The testing device for the sealing performance of the energy storage battery pole according to claim 1, wherein a rubber nozzle (11) is fixed on the lower surface of the sealing head (5), and the air outlet of the air pipe (6) Extend to the lower surface of the rubber nozzle (11).
A method for testing the sealing performance of battery poles, which is characterized in that the testing is performed using the energy storage battery terminal sealing performance testing device according to claim 1 or 2, comprising the following steps:

S1: Install the terminal to be tested (1) into the terminal slot (401) of the middle cover (4), and connect the pole (101) of the terminal to be tested (1) and the terminal slot (401) It is sealed by a sealing ring (402), and then a sealant (13) is used to seal the pole (101) and copper sheet (102) of the terminal (1) to be tested with the terminal groove (401) to form an integral structure, wherein, A part of the copper sheet (102) protrudes to the outside of the sealant (13);

S2: Invert the overall structure, that is, place the copper sheet (102) protruding out of the sealant (13) facing downwards and the pole (101) facing upwards, facing the pole (101) Inject a detection liquid (15) into the gap between and the terminal groove (401);

S3: Place the inverted overall structure on the top platform (14), pull the control valve (12) to raise the telescopic rod (201) of the air cylinder (2) to lift the terminal slot (401) The outer edge of the root of) is locked and sealed with the lower surface of the sealing head (5);

S4: Manually press the air compressor (7) to inflate the space between the sealing head (5) and the terminal groove (401) through the air pipe (6) to the pressure gauge (8) After the reading reaches the preset value, close the shut-off valve (9);

S5: After holding the pressure for a preset time, open the shut-off valve (9), remove the overall mechanism, and observe whether there is leakage of the detection liquid (15) around the copper sheet (102) of the terminal (1) to be tested If there is leakage, it can be determined that the sealing performance of the sealant (13) is poor, otherwise the sealing effect of the sealant (13) is better.
The detection method of an energy storage battery terminal sealing performance detection device according to claim 3, characterized in that, in the S4, the preset value is less than the top pressure of the cylinder (2), and the preset Set the value to 15-40kpa.
The detection method of an energy storage battery terminal sealing performance detection device according to claim 3, wherein, in the S5, the preset time is 50-80s.
The detection method of an energy storage battery pole sealing performance detection device according to any one of claims 3, characterized in that, in the S3, the overall structure is placed upside down on the top platform (14) Before loading, the color developing paper (16) is also laid on the top platform (14).
The detection method of an energy storage battery terminal sealing performance detection device according to claim 6, wherein the color-developing paper (16) is rice paper.
The detection method of an energy storage battery terminal sealing performance detection device according to any one of claims 3 to 7, wherein the detection liquid (15) is black ink.