Air tightness detection system for storage battery

Abstract

The utility model discloses an air tightness detection system for a storage battery, and relates to the technical field of storage battery production. The device comprises an air source output pipeline, wherein the output end of the air source output pipeline is connected with a pressurizing pipeline and a negative pressure pipeline in parallel; the pressurizing pipeline is sequentially connected with an electromagnetic valve A, a pressurizing unit, an electromagnetic valve B and a detection device A in series; the air inlet end of the electromagnetic valve A is connected with an air source output pipeline; the negative pressure pipeline is sequentially connected with an electromagnetic valve C, a pressure reduction unit, an electromagnetic valve D and a detection device B in series; and the air inlet end of the electromagnetic valve C is connected with an air source output pipeline. According to the utility model, positive pressure detection and negative pressure detection can be carried out on the storage battery respectively by using the detection device A and the detection device B, so that the air tightness detection of the storage battery is more sufficient, the situation that misjudgment is easy to occur due to single positive pressure detection is avoided, and the reliability of air tightness detection of the storage battery is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of storage battery manufacturing technology, and in particular relates to an airtightness testing system for storage batteries. Background Technology

[0002] The airtightness test after sealing the battery cover and terminals is directly related to major defect modes such as battery grid failure and battery acid leakage failure, and is an essential testing step in the current battery production process.

[0003] For example, Chinese utility model CN204389125U discloses a battery airtightness testing device. The device has six air nozzles that correspond one-to-one with the individual cells of the battery to be tested. The spacing of the air nozzles can be adjusted according to the spacing of different battery cells, thus making it suitable for different models of battery cells. It can quickly complete the testing of the entire battery.

[0004] However, existing battery airtightness testing only performs positive pressure testing, not negative pressure testing. During positive pressure testing, electrolytes or lead powder inside the battery can easily clog the cracks, causing the test to show as normal and leading to misjudgment. This results in low reliability of battery airtightness testing. Utility Model Content

[0005] The purpose of this invention is to provide an airtightness testing system for storage batteries. By setting up a booster pipeline and a negative pressure pipeline, and using testing device A and testing device B, the system can perform positive and negative pressure tests on the storage battery respectively, thus solving the problem that existing systems only perform positive pressure tests, resulting in low reliability of storage battery airtightness testing.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to an airtightness testing system for storage batteries, comprising an air source output pipeline, with a booster pipeline and a negative pressure pipeline connected in parallel at the output end of the air source output pipeline; the booster pipeline is connected in series with a solenoid valve A, a booster unit, a solenoid valve B, and a detection device A; wherein the air inlet of the solenoid valve A is connected to the air source output pipeline; the negative pressure pipeline is connected in series with a solenoid valve C, a pressure reducing unit, a solenoid valve D, and a detection device B; wherein the air inlet of the solenoid valve C is connected to the air source output pipeline.

[0008] As a preferred technical solution of this utility model, it also includes an electromagnetic reversing valve, wherein the boosting unit and the depressurizing unit are respectively connected to the port on one side of the electromagnetic reversing valve, and the electromagnetic valve B and the electromagnetic valve D are respectively connected to the port on the other side of the electromagnetic reversing valve, for switching the connection state between the detection device A and the detection device B and the boosting pipeline and the negative pressure pipeline, respectively, through the electromagnetic reversing valve.

[0009] As a preferred embodiment of this utility model, a compensation pipeline is connected between the exhaust end of the pressure reducing unit and the intake end of the pressure boosting unit, and a one-way valve is connected in series in the compensation pipeline.

[0010] As a preferred embodiment of this utility model, a gas source processing unit is connected in series in the gas source output pipeline.

[0011] As a preferred embodiment of this utility model, a pressure gauge A is connected in the connecting pipe between the solenoid valve B and the detection device A, and a pressure gauge B is connected in the connecting pipe between the solenoid valve D and the detection device B.

[0012] As a preferred embodiment of this invention, the pressurization unit is an air pump.

[0013] As a preferred embodiment of this invention, the pressure reduction unit is a negative pressure generator.

[0014] This utility model has the following beneficial effects:

[0015] This invention, by setting up a booster pipeline and a negative pressure pipeline, and using detection device A and detection device B, can realize positive and negative pressure detection of the battery respectively, making the battery airtightness detection more thorough and avoiding the possibility of misjudgment caused by single positive pressure detection, thereby effectively improving the reliability of battery airtightness detection.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an airtightness testing system for a storage battery according to the present invention.

[0019] Figure 2 This is a schematic diagram showing the connection status of detection device A and detection device B with the booster pipeline and the negative pressure pipeline, respectively, after switching.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1-Gas source output pipeline, 2-Boosting pipeline, 3-Negative pressure pipeline, 4-Detection device A, 5-Detection device B, 6-Solenoid directional valve, 7-Compensation pipeline, 101-Gas source processing unit, 201-Solenoid valve A, 202-Boosting unit, 203-Solenoid valve B, 301-Solenoid valve C, 302-Pressure reducing unit, 303-Solenoid valve D, 401-Pressure gauge A, 501-Pressure gauge B, 701-Check valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Example 1

[0025] Please see Figure 1 As shown, this utility model is an airtightness testing system for storage batteries, including a gas source output pipeline 1, with a booster pipeline 2 and a negative pressure pipeline 3 connected in parallel at the output end of the gas source output pipeline 1. A gas source processing unit 101 is connected in series in the gas source output pipeline 1, which processes the gas source gas, such as by filtering, separating moisture, separating oil and gas, and regulating pressure. At the same time, a pressure gauge is also connected to the gas source output pipeline 1 to facilitate real-time monitoring of the gas source pressure.

[0026] The booster pipeline 2 is connected in series with solenoid valve A201, booster unit 202, solenoid valve B203 and detection device A4.

[0027] Among them, the air inlet of solenoid valve A201 is connected to air source output pipeline 1, the booster unit 202 is an air pump, and pressure gauge A401 is connected in the connecting pipeline between solenoid valve B203 and detection device A4.

[0028] During testing, the testing device A4 is connected to the battery, solenoid valves A201 and B203 are opened, and the booster unit 202 injects air into the battery. When the pressure gauge A401 reaches the pressure set value, the booster unit 202 stops, and solenoid valves A201 and B203 close, keeping the battery under pressure. At this time, the change in the pressure gauge A401 value is observed. If the pressure gauge A401 can maintain a certain pressure within the specified time, it indicates that the battery airtightness test is qualified; otherwise, it is unqualified.

[0029] The negative pressure pipeline 3 is connected in series with a solenoid valve C301, a pressure reducing unit 302, a solenoid valve D303, and a detection device B5; wherein, the air inlet of the solenoid valve C301 is connected to the air source output pipeline 1, the pressure reducing unit 302 is a negative pressure generator, and a pressure gauge B501 is connected in the connecting pipeline between the solenoid valve D303 and the detection device B5.

[0030] During the negative pressure test, the testing device B5 is connected to the battery, solenoid valves C301 and D303 are opened, and the pressure reducing unit 302 works, causing a negative pressure to be generated inside the battery. When the pressure gauge B501 reaches the specified value, solenoid valves C301 and D303 are closed, and the pressure reducing unit 302 stops. If the pressure gauge B501 can maintain a certain pressure within the specified time, it means that the battery airtightness test is qualified; otherwise, it is unqualified.

[0031] After the positive pressure test, the battery is connected to the testing device B5 for a negative pressure test. After the negative pressure test, the battery is connected to the testing device A4 for a positive pressure test. This completes both the positive and negative pressure tests on the battery. If both the positive and negative pressure tests are qualified, it means that the battery's airtightness test is qualified. This makes the battery airtightness test more thorough and avoids the possibility of misjudgment that can easily occur with a single positive pressure test, thus effectively improving the reliability of the battery airtightness test.

[0032] Example 2

[0033] like Figure 2 As shown, based on Embodiment 1, it also includes an electromagnetic reversing valve 6, wherein the boosting unit 202 and the pressure reducing unit 302 are respectively connected to the port on one side of the electromagnetic reversing valve 6, and the electromagnetic valves B203 and D303 are respectively connected to the port on the other side of the electromagnetic reversing valve 6, for switching the connection state between the detection device A4 and the detection device B5 and the boosting pipeline 2 and the negative pressure pipeline 3 respectively through the electromagnetic reversing valve 6.

[0034] Specifically, when the boosting unit 202 is connected to the solenoid valve B203 by the solenoid reversing valve 6, and the pressure reducing unit 302 is connected to the solenoid valve D303, the process of positive pressure detection by the detection device A4 and negative pressure detection by the detection device B5 in Embodiment 1 is carried out.

[0035] After the positive or negative pressure of the battery is detected, the solenoid reversing valve 6 switches to the conduction state, so that the boosting unit 202 is connected to the solenoid valve D303, and the pressure reducing unit 302 is connected to the solenoid valve B203.

[0036] At this time, the boosting unit 202 injects gas into the battery through the detection device B5, and the positive pressure detection of the battery is realized through the detection device B5. Meanwhile, the depressurization unit 302 performs negative pressure detection of the battery through the detection device A4. Thus, the positive and negative pressure detection of the battery can be completed in one clamping, which effectively reduces the number of clamping operations for positive and negative pressure detection of the battery, thereby improving the overall detection efficiency.

[0037] As another preferred embodiment, a compensation pipeline 7 is connected between the exhaust end of the pressure reducing unit 302 and the intake end of the pressure boosting unit 202, and a one-way valve 701 is connected in series in the compensation pipeline 7, so that the gas in the compensation pipeline 7 can only flow from the pressure reducing unit 302 to the pressure boosting unit 202, that is, the exhaust of the pressure reducing unit 302 is connected to the intake of the pressure boosting unit 202, which achieves the effect of gas compensation, thereby making full use of the gas source, reducing the gas source consumption, and effectively saving gas source and overall energy consumption.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A gas tightness detection system for a battery, characterized by: The air source output pipeline (1) is connected with the pressure increasing pipeline (2) and the negative pressure pipeline (3) in parallel at the output end. The pressure increasing pipeline (2) is connected with the electromagnetic valve A (201), the pressure increasing unit (202), the electromagnetic valve B (203) and the detection device A (4) in sequence; the air inlet end of the electromagnetic valve A (201) is connected with the air source output pipeline (1). The negative pressure pipeline (3) is connected with the electromagnetic valve C (301), the pressure decreasing unit (302), the electromagnetic valve D (303) and the detection device B (5) in sequence; the air inlet end of the electromagnetic valve C (301) is connected with the air source output pipeline (1).

2. A system for detecting air tightness of a battery according to claim 1, wherein The electromagnetic valve B (203) and the electromagnetic valve D (303) are connected with the ports on the other side of the electromagnetic switching valve (6) respectively, and the electromagnetic switching valve (6) is used for switching the connection state between the detection device A (4) and the detection device B (5) and the pressure increasing pipeline (2) and the negative pressure pipeline (3) respectively.

3. A system for detecting the gas tightness of a battery according to claim 1 or 2, characterized in that, The exhaust end of the pressure decreasing unit (302) is connected with the air inlet end of the pressure increasing unit (202), and a one-way valve (701) is connected in the compensation pipeline (7).

4. The system for detecting air tightness of a battery according to claim 1, wherein The air source output pipeline (1) is connected with the air source processing unit (101).

5. The system for detecting air tightness of a battery according to claim 1, wherein The connection pipeline between the electromagnetic valve B (203) and the detection device A (4) is connected with the pressure gauge A (401), and the connection pipeline between the electromagnetic valve D (303) and the detection device B (5) is connected with the pressure gauge B (501).

6. The system for detecting air tightness of a battery according to claim 1 or 2, wherein The pressure increasing unit (202) is a gas pump.

7. The system for detecting air tightness of a battery according to claim 1 or 2, wherein The pressure decreasing unit (302) is a negative pressure generator.

Images