Sealing performance detection equipment for battery top cover

Abstract

The utility model relates to the technical field of battery detection equipment, particularly provides sealing performance detection equipment for a battery top cover, and aims to solve the problem that the sealing performance detection equipment in the prior art cannot detect the sealing performance of the battery top cover in a low-temperature environment. In order to achieve the purpose, the sealing performance detection equipment comprises a sealing cavity; the clamping assembly is arranged to be capable of clamping the battery top cover, so that the rubber sealing structure of the battery top cover is positioned in the sealing cavity, and the sealing cavity is isolated into two parts; the refrigerating device is used for refrigerating the sealing cavity; and the detection assembly comprises a detection gas introduction device and an air tightness leakage detection device, and the detection gas introduction device and the air tightness leakage detection device are respectively communicated with one of the two parts of the sealing cavity so as to detect the sealing performance of the battery top cover. According to the utility model, the sealing performance of the rubber sealing structure of the battery top cover in a low-temperature environment can be detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery detection equipment technical field, specifically provide a kind of sealing performance detection equipment for battery top cover. BACKGROUND

[0002] With the rapid development of electric vehicles, energy storage, 3C and other fields, the demand for lithium-ion batteries increases year by year, and lithium-ion batteries have entered a stage of rapid growth. The battery top cover of the lithium-ion battery includes a top cover plate and a pole post disposed on the top cover plate. The pole post and the welding ring are integrally formed by encapsulating, and then the welding ring is welded and fixed with the top cover sheet, so as to realize the installation of the pole post on the top cover sheet. Since the pole post and the welding ring are integrally formed by encapsulating with a sealing ring, the sealing effect will directly affect the use effect and service life of the battery, so it is necessary to detect the sealing performance of the top cover by a sealing performance detection device.

[0003] However, the battery sometimes needs to be used in a low temperature environment, and the sealing ring may affect the sealing performance of the battery top cover due to shrinkage and other reasons caused by cold. However, the existing sealing performance detection device cannot detect the sealing performance of the battery top cover in a low temperature environment.

[0004] Therefore, there is a need in the art for a new sealing performance detection device for a battery top cover to solve the above problems. SUMMARY

[0005] The utility model aims at solving the above technical problem, i.e. solving the problem that the sealing performance detection device of the prior art cannot detect the sealing performance of the battery top cover in a low temperature environment.

[0006] The utility model provides a kind of sealing performance detection equipment for battery top cover, the sealing performance detection equipment includes: sealing cavity;Clamping assembly, the clamping assembly is set to be capable of clamping the battery top cover, to position the rubber sealing structure of the battery top cover in the sealing cavity, and the sealing cavity is isolated into two parts;Refrigeration device, the refrigeration device is used to refrigerate the sealing cavity;Detection assembly, the detection assembly includes detection gas inlet device and gas tightness leak detection device, the detection gas inlet device and the gas tightness leak detection device are respectively communicated with one of the two parts of the sealing cavity, to detect the sealing performance of the battery top cover.

[0007] In the technical scheme, the rubber sealing structure of the battery top cover is positioned in the sealing cavity, and the battery top cover divides the sealing cavity into two parts, so that the detection gas is introduced into one of the two parts of the sealing cavity through the gas introduction device, and the gas pressure or the concentration of the detection gas in the other part of the sealing cavity is detected through the gas tightness leak detection device, so that the sealing performance of the rubber sealing structure can be detected, and the refrigeration device is used to refrigerate the sealing cavity, so that the rubber sealing structure in the sealing cavity can be in a low-temperature environment, and the sealing performance of the rubber sealing structure of the battery top cover in the low-temperature environment can be detected. In addition, the refrigeration device can be controlled to refrigerate or not to refrigerate and the temperature of refrigeration, so that the utility model can be applied to different detection requirements, thereby improving the detection effect and the detection efficiency.

[0008] In the specific embodiment of the sealing performance detection device for the battery top cover, the refrigeration device comprises a refrigerant circuit, and a compressor, a condenser, an expansion valve and an evaporator sequentially arranged on the refrigerant circuit, and the evaporator is arranged at the top of the sealing cavity.

[0009] In the technical scheme, the refrigerant is compressed by the compressor, enters the condenser to be condensed and radiated, then enters the evaporator to be evaporated and absorbed after throttling by the expansion valve, and then returns to the compressor for compression, so that the evaporator continuously absorbs heat to refrigerate the sealing cavity, and frequent replacement of the refrigerant is avoided. In addition, since the cold air moves downward, the evaporator is arranged at the top of the sealing cavity, so that better refrigeration effect can be achieved.

[0010] In the specific embodiment of the sealing performance detection device for the battery top cover, the clamping assembly comprises a base and a pressing structure arranged above the base; a first recess and a first sealing structure are arranged at the top of the base, and the first sealing structure is arranged at the outer periphery of the first recess; a second recess and a second sealing structure are arranged at the bottom of the pressing structure, the second sealing structure is arranged at the outer periphery of the second recess, the second sealing structure is opposite to the first sealing structure and can abut against each other, the first recess, the second recess, the first sealing structure and the second sealing structure jointly form the sealing cavity, and the battery top cover is clamped between the first sealing structure and the second sealing structure.

[0011] In the technical scheme, the first sealing structure and the second sealing structure abut against each other to clamp and fix the battery top cover. In addition, the first groove, the second groove, the first sealing structure and the second sealing structure jointly form a sealing cavity. The position of the battery top cover can be adjusted to position the rubber sealing structure of the battery top cover in the sealing cavity. The battery top cover divides the sealing cavity into two parts, one part is formed by the first groove, the first sealing structure and the battery top cover, and the other part is formed by the second groove, the second sealing structure and the battery top cover.

[0012] In the specific embodiment of the sealing performance detection device for the battery top cover, the first sealing structure and the second sealing structure are sealing rings.

[0013] In the technical scheme, the sealing ring has good sealing performance and various sizes and shapes can be selected, which can be applied to the rubber sealing structure of the battery top cover of different sizes and shapes, is convenient to use and can save costs.

[0014] In the specific embodiment of the sealing performance detection device for the battery top cover, the pressing structure is formed by at least a part of the shell of the refrigeration device.

[0015] In the technical scheme, the shell of the refrigeration device and the pressing structure are integrated, and the pressing structure does not need to be separately arranged, which simplifies the installation and saves materials.

[0016] In the specific embodiment of the sealing performance detection device for the battery top cover, the base is provided with a first channel, and the first channel is in communication with the first groove and the gas-tight leak detection device, respectively.

[0017] In the technical scheme, the first channel is arranged on the base to communicate the gas-tight leak detection device with one part of the sealing cavity formed by the first groove, the first sealing structure and the battery top cover.

[0018] In the specific embodiment of the sealing performance detection device for the battery top cover, the pressing structure is provided with a second channel, and the second channel is in communication with the second groove and the detection gas inlet device, respectively.

[0019] In the technical scheme, the first channel is arranged on the pressing structure to communicate the detection gas inlet device with the other part of the sealing cavity formed by the second groove, the second sealing structure and the battery top cover.

[0020] In the specific embodiment of the sealing performance detection device for the battery top cover, the clamping assembly further comprises a gas cylinder, and a cylinder rod of the gas cylinder is connected with the pressing structure to drive the pressing structure to vertically move.

[0021] In the case of adopting the technical scheme, when the cylinder drives the pressing structure to move upward, the first sealing structure and the second sealing structure can be separated to place the battery top cover between the first sealing structure and the second sealing structure, when the cylinder drives the pressing structure to move downward, the battery top cover can be pressed and fixed, and the abutting force between the first sealing structure and the second sealing structure is improved, and then the sealing effect is improved.

[0022] In the specific embodiment of the sealing performance detection equipment for the battery top cover, the refrigerant in the refrigerant circuit is R134A or R600A.

[0023] In the case of adopting the technical scheme, R134A has the characteristics of high stability and safety and non-toxicity, and can realize safe and stable refrigeration effect; R600A has the characteristics of large evaporation latent heat, strong cooling capacity and good flow performance, and can realize rapid refrigeration.

[0024] In the specific embodiment of the sealing performance detection equipment for the battery top cover, the detection gas inlet device is a helium gas inlet device, and the air tightness leak detection device is a helium mass spectrometer leak detector.

[0025] In the case of adopting the technical scheme, the helium mass spectrometer leak detector first evacuates one part of the two parts of the sealed cavity, then the helium gas inlet device introduces helium gas into the other part of the two parts of the sealed cavity, and then the helium mass spectrometer leak detector detects the helium gas concentration of the evacuated part. Since the sealed cavity is isolated into two parts by the battery top cover, the sealing performance of the rubber sealing structure of the battery top cover can be judged according to the change of the helium gas concentration.

[0026] Compared with the prior art, the sealing performance detection equipment for the battery top cover has the following advantages: the rubber sealing structure of the battery top cover is positioned in the sealed cavity, and the battery top cover isolates the sealed cavity into two parts. Therefore, the detection gas inlet device introduces detection gas into one part of the two parts of the sealed cavity, and the air tightness leak detection device detects the air pressure or the concentration of the detection gas in the other part of the sealed cavity. The sealing performance of the rubber sealing structure can be detected. The refrigeration device cools the sealed cavity, so that the rubber sealing structure in the sealed cavity can be in a low-temperature environment. The sealing performance of the rubber sealing structure of the battery top cover in a low-temperature environment is detected. In addition, the refrigeration device can control whether to cool and the temperature of the refrigeration to adapt to different detection requirements, thereby improving the detection effect and efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] The preferred embodiments of the utility model will be described below in combination with the drawings, and the drawings are as follows:

[0028] Figure 1is the cross-sectional structure schematic diagram of the battery top cover;

[0029] Figure 2 is the overall structure schematic diagram of the sealing performance detection equipment for the battery top cover of the utility model;

[0030] Figure 3 is the partial structure schematic diagram of the refrigeration device of the utility model.

[0031] Explanation of reference signs:

[0032] 1-sealing cavity, 2-clamping assembly, 3-refrigeration device, 4-detection assembly, 5-battery top cover, 21-base, 22-pressing structure, 31-refrigerant circuit, 32-compressor, 33-condenser, 34-expansion valve, 35-evaporator, 41-detection gas inlet device, 42-gas tightness leak detection device, 51-top cover body, 52-rubber sealing structure, 53-pole, 211-first groove, 212-first sealing structure, 213-first channel, 221-second groove, 222-second sealing structure, 223-second channel. DETAILED DESCRIPTION

[0033] Some embodiments of the utility model will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not used to limit the protection scope of the utility model. Those skilled in the art can make adjustments according to the needs in order to adapt to specific application occasions.

[0034] It should be noted that in the description of the utility model, the terms "center", "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not indicative or suggestive of the related devices or elements must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, in the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0035] Moreover, it needs to be explained that, in the description of the utility model, ordinal numbers "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In addition, in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connected" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection, it can be mechanical connection, or electrical connection, it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] Based on the background technology pointed out that the sealing performance detection equipment of the prior art cannot detect the sealing performance of the battery top cover in low temperature environment, and the sealing performance detection equipment for battery top cover of the utility model is used to realize the detection of the sealing performance of the rubber sealing structure of the battery top cover in low temperature environment.

[0037] Firstly refer to Figure 1 , the figure shows the cross-sectional structure of the battery top cover. As Figure 1 Indicated, the battery top cover 5 includes a top cover body 51, a rubber sealing structure 52, a pole 53 and a welding ring, the pole 53 and the welding ring are integrally formed by rubber sealing structure 52, then the welding ring is welded and fixed with the top cover body 51, and the sealing performance of the rubber sealing structure 52 will directly affect the use effect and service life of the battery.

[0038] Next refer to Figure 2 And Figure 3 , Figure 2 The overall structure of the sealing performance detection equipment for battery top cover of the utility model is shown, Figure 3 The partial structure of the refrigeration device of the utility model is shown. As Figure 2 And Figure 3 Indicated, the sealing performance detection equipment of the utility model includes a sealing cavity 1, a clamping assembly 2, a refrigeration device 3 and a detection assembly 4.

[0039] The clamping assembly 2 comprises a base 21 and a pressing structure 22 arranged above the base 21, the pressing structure 22 being a shell of the refrigeration device 3; the top of the base 21 is provided with a first groove 211 and a first sealing structure 212, the first sealing structure 212 being arranged at the outer periphery of the first groove 211; the bottom of the pressing structure 22 is provided with a second groove 221 and a second sealing structure 222, the second sealing structure 222 being arranged at the outer periphery of the second groove 221, the second sealing structure 222 being opposite to the first sealing structure 212 and capable of abutting against each other, the first groove 211, the second groove 221, the first sealing structure 212 and the second sealing structure 222 jointly forming a sealing cavity 1, and the battery top cover 5 is clamped between the first sealing structure 212 and the second sealing structure 222. Through the abutment of the first sealing structure 212 and the second sealing structure 222, the clamping and fixing of the battery top cover 5 are realized, and the first groove 211, the second groove 221, the first sealing structure 212 and the second sealing structure 222 jointly form the sealing cavity 1, the rubber sealing structure 52 of the battery top cover 5 can be positioned in the sealing cavity 1 by adjusting the position of the battery top cover 5, and the battery top cover 5 divides the sealing cavity 1 into two parts, one part being formed by the first groove 211, the first sealing structure 212 and the battery top cover 5, and the other part being formed by the second groove 221, the second sealing structure 222 and the battery top cover 5. Among them, the first sealing structure 212 and the second sealing structure 222 can be sealing rings. The clamping assembly 2 further comprises a gas cylinder, the cylinder rod of the gas cylinder being connected with the pressing structure 22 to drive the vertical movement of the pressing structure 22; when the gas cylinder drives the upward movement of the pressing structure 22, the first sealing structure 212 and the second sealing structure 222 can be separated to place the battery top cover 5 between the first sealing structure 212 and the second sealing structure 222, and when the gas cylinder drives the downward movement of the pressing structure 22, the battery top cover 5 can be tightly fixed, and the abutting force between the first sealing structure 212 and the second sealing structure 222 is improved, thereby improving the sealing effect.

[0040] The refrigeration device 3 comprises a shell and a refrigerant circuit 31, and sequentially arranged on the refrigerant circuit 31 are a compressor 32, a condenser 33, an expansion valve 34 and an evaporator 35, the refrigerant in the refrigerant circuit 31 can be R134A or R600A, or R410A or R140A, etc., the compressor 32 is arranged in the shell, the evaporator 35 is arranged at the top of the sealed cavity 1 and is mounted on the bottom of the shell, the condenser 33 can be mounted on the outer wall of the shell or the inner wall of the shell, when the condenser 33 is mounted on the inner wall of the shell, a ventilation hole is arranged on the shell at the position where the condenser 33 is mounted, so that the condenser 33 exchanges heat with air. The refrigerant is compressed by the compressor 32, enters the condenser 33 to be condensed and radiated heat, then passes through the expansion valve 34 to be throttled, enters the evaporator 35 to be evaporated and absorb heat, and then returns to the compressor 32 to be compressed, repeatedly circulates, the evaporator 35 continuously absorbs heat to realize refrigeration for the sealed cavity 1 and avoid frequent replacement of the refrigerant, in addition, since the cold air moves downward, the evaporator 35 is arranged at the top of the sealed cavity 1, so that better refrigeration effect can be achieved.

[0041] The detection assembly 4 comprises a detection gas inlet device 41 and an air tightness detection device 42, the base 21 is provided with a first channel 213, the first channel 213 is respectively communicated with the first groove 211 and the air tightness detection device 42, the pressing structure 22 is provided with a second channel 223, the second channel 223 is respectively communicated with the second groove 221 and the detection gas inlet device 41, and the detection gas inlet device 41 and the air tightness detection device 42 are respectively communicated with one of the two parts of the sealed cavity 1, so as to detect the sealing performance of the battery top cover 5.

[0042] Since the rubber sealing structure 52 of the battery top cover 5 is positioned in the sealed cavity 1, and the battery top cover 5 divides the sealed cavity 1 into two parts, the detection gas is introduced into one of the two parts of the sealed cavity 1 through the detection gas inlet device 41, and the air pressure or the concentration of the detection gas in the other part of the sealed cavity 1 is detected through the air tightness detection device 42, so that the sealing performance of the rubber sealing structure 52 can be detected, and the rubber sealing structure 52 in the sealed cavity 1 can be in a low-temperature environment through the refrigeration of the refrigeration device 3, so that the sealing performance of the rubber sealing structure 52 of the battery top cover 5 in a low-temperature environment can be detected. In addition, whether to refrigerate and the temperature of refrigeration can be controlled through the refrigeration device 3, so that the utility model can also be applied to different detection requirements, thereby improving the detection effect and the detection efficiency.

[0043] Optionally, the detection gas inlet device 41 is a helium inlet device, and the airtightness leak detection device 42 is a helium mass spectrometer leak detector. The helium mass spectrometer leak detector first evacuates one part of the two sections of the sealed cavity 1, then introduces helium into the other part of the two sections of the sealed cavity 1 through the helium inlet device. The helium mass spectrometer leak detector then detects the helium concentration in the evacuated section. Since the sealed cavity 1 is isolated into two parts by the battery top cover 5, the sealing performance of the rubber sealing structure 52 of the battery top cover 5 can be determined based on the change in helium concentration. When the sealing performance of the rubber sealing structure 52 of the battery top cover 5 is good and meets the usage requirements, helium cannot pass through the battery top cover 5 into the evacuated section. At this time, the helium mass spectrometer leak detector cannot detect helium. However, when the helium mass spectrometer leak detector detects helium, it indicates that there is a problem with the sealing performance of the battery top cover 5. In addition to helium, the gas introduction device 41 can also be an argon, nitrogen, hydrogen, or other gas introduction device. In addition to determining the sealing performance by obtaining the concentration of the gas to be tested, the gas tightness detection device can also determine the sealing performance by detecting changes in gas pressure. Those skilled in the art can make adjustments as needed.

[0044] Those skilled in the art will understand that, although the above combination Figure 1 The description states that the pressing structure 22 is the outer shell of the refrigeration device 3, but this is not a limitation. The pressing structure 22 can also be part of the outer shell of the refrigeration device 3, or it can be a separate structure, as long as the pressing structure 22 is provided with the second groove 221 and the second sealing structure 222. When the pressing structure 22 is a separate structure, the refrigeration device 3 can be located above the pressing mechanism or in other positions, as long as it can cool the sealed cavity 1.

[0045] It should be noted that the above embodiments are only used to illustrate the principle of this utility model and are not intended to limit the scope of protection of this utility model. Without departing from the principle of this utility model, those skilled in the art can adjust the above embodiments so that this utility model can be applied to more specific application scenarios.

[0046] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A sealing performance detection apparatus for a battery top cover, characterized by, The sealing performance detection device comprises: a sealing cavity; a clamping assembly arranged to clamp the battery top cover so as to position the rubber sealing structure of the battery top cover in the sealing cavity and isolate the sealing cavity into two parts; a refrigeration device for refrigerating the sealing cavity; a detection assembly comprising a detection gas inlet device and a gas tightness leak detection device, which are respectively communicated with one of the two parts of the sealing cavity to detect the sealing performance of the battery top cover.

2. The sealing performance detection device for the battery top cover according to claim 1, wherein the refrigeration device comprises a refrigerant circuit and a compressor, an evaporator, an expansion valve and a condenser sequentially arranged on the refrigerant circuit, and the evaporator is arranged at the top of the sealing cavity.

3. The sealing performance detection device for the battery top cover according to claim 1, wherein the clamping assembly comprises a base and a pressing structure arranged above the base; the top of the base is provided with a first groove and a first sealing structure, and the first sealing structure is arranged at the outer periphery of the first groove; the bottom of the pressing structure is provided with a second groove and a second sealing structure, and the second sealing structure is arranged at the outer periphery of the second groove, the second sealing structure is opposite to and abuts against the first sealing structure, and the first groove, the second groove, the first sealing structure and the second sealing structure jointly form the sealing cavity, and the battery top cover is clamped between the first sealing structure and the second sealing structure.

4. The sealing performance detection device for the battery top cover according to claim 3, wherein the first sealing structure and the second sealing structure are sealing rings.

5. The sealing performance detection device for the battery top cover according to claim 3, wherein the pressing structure is composed of at least a part of the shell of the refrigeration device.

6. The sealing performance detection device for the battery top cover according to claim 3, wherein a first channel is arranged on the base, and the first channel is respectively communicated with the first groove and the gas tightness leak detection device.

7. The sealing performance detection device for the battery top cover according to claim 3, wherein a second channel is arranged on the pressing structure, and the second channel is respectively communicated with the second groove and the detection gas inlet device.

8. The sealing performance detection device for the battery top cover according to claim 3, wherein the clamping assembly further comprises a pneumatic cylinder, and a cylinder rod of the pneumatic cylinder is connected with the pressing structure to drive the pressing structure to move vertically.

9. The sealing performance detection device for the battery top cover according to claim 2, wherein the refrigerant in the refrigerant circuit is R134A or R600A.

10. The sealing performance detection device for the battery top cover according to claim 1, wherein the detection gas inlet device is a helium gas inlet device, and the gas tightness leak detection device is a helium mass spectrometer leak detector.

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