Negative pressure cup assembly

Abstract

The utility model discloses a negative pressure cup assembly which comprises a negative pressure cup body, a negative pressure suction nozzle, a negative pressure suction nozzle rod and a detection assembly, and the negative pressure cup body is provided with a containing cavity; the top of the negative-pressure suction nozzle rod is connected with the bottom of the negative-pressure cup body and is communicated with the accommodating cavity; the negative pressure suction nozzle sleeves the negative pressure suction nozzle rod, is communicated with the negative pressure suction nozzle rod, and is used for being communicated with a liquid injection opening of the battery; the negative pressure suction nozzle rod and / or the negative pressure suction nozzle are / is communicated with a detection pipe, the detection pipe is communicated with a negative pressure detection meter through an adapter pipe, and the negative pressure detection meter can detect the negative pressure value in the negative pressure suction nozzle rod and / or the negative pressure suction nozzle. According to the technical scheme, the negative pressure value in the negative pressure suction nozzle rod or the negative pressure suction nozzle can be detected, negative pressure value data are fed back to the formation system at the first time, then the formation system takes corresponding measures according to the fed-back negative pressure value, the safety of a battery cell is guaranteed, and the formation quality of the battery cell is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery formation machine technology, and in particular to a negative pressure cup assembly. Background Technology

[0002] During the manufacturing process of lithium batteries, they need to be charged and formed. However, the heat generated during charging will raise the temperature of the electrolyte, and the expanding electrolyte will overflow from the injection port. To prevent this overflowing electrolyte from spreading to the surface of the battery casing, a negative pressure cup is commonly used to collect the overflowing electrolyte. Therefore, the manufacturing cost of the negative pressure cup is directly related to the overall manufacturing cost of the lithium battery.

[0003] The negative pressure suction rod in the existing negative pressure cup assembly is just an ordinary through rod without a negative pressure detection device. This makes it easy for electrolyte crystallization to block the negative pressure suction rod without being detected in time. This can lead to the failure of individual cell formation and even the serious consequence of the cell being burst by the gas generated during the formation process. Utility Model Content

[0004] The main purpose of this invention is to provide a negative pressure cup assembly, which is designed to detect the negative pressure value inside the negative pressure suction nozzle rod and the negative pressure suction nozzle, thereby determining whether there is a blockage and improving the quality of cell formation.

[0005] To achieve the above objectives, the negative pressure cup assembly proposed in this utility model includes:

[0006] A negative pressure cup body having a receiving cavity;

[0007] A negative pressure suction rod, the top of which is connected to the bottom of the negative pressure cup body and communicates with the receiving cavity;

[0008] A negative pressure suction nozzle is sleeved on a negative pressure suction nozzle rod and connected to the negative pressure suction nozzle rod. The negative pressure suction nozzle is used to connect to the battery's liquid filling port.

[0009] A detection tube is connected to the negative pressure suction nozzle rod and / or the negative pressure suction nozzle. The detection tube is connected to a negative pressure measuring instrument through an adapter tube. The negative pressure measuring instrument can detect the negative pressure value inside the negative pressure suction nozzle rod and / or the negative pressure suction nozzle.

[0010] Furthermore, the detection tube is connected to the side wall of the negative pressure suction nozzle rod.

[0011] Furthermore, the detection tube and the negative pressure suction nozzle rod are integrally formed.

[0012] Furthermore, in the upward direction, the detection tube gradually extends away from the side wall of the negative pressure suction nozzle rod.

[0013] Furthermore, the angle between the detection tube and the negative pressure suction nozzle rod is 30 to 60 degrees.

[0014] Furthermore, the negative pressure suction nozzle rod has a first negative pressure channel inside, the negative pressure suction nozzle has a second negative pressure channel inside, the detection tube has a detection hole inside, the first negative pressure channel is connected to the second negative pressure channel, and the two ends of the detection hole are connected to the first negative pressure channel and the adapter tube.

[0015] Furthermore, the cross-section of the detection tube is circular.

[0016] Furthermore, the adapter pipe is made of a soft material.

[0017] Furthermore, the adapter pipe is made of Teflon.

[0018] Furthermore, the negative pressure cup assembly also includes a mounting base, which has a through hole through which the negative pressure suction nozzle rod passes. The negative pressure suction nozzle rod is movably inserted through the through hole. An installation gap is formed between the mounting base and the negative pressure suction nozzle rod at the through hole. A spring is sleeved on the outer periphery of the negative pressure suction nozzle rod, and the spring passes through the installation gap. The detection tube is located at the bottom of the negative pressure suction nozzle rod and between the spring and the negative pressure suction nozzle.

[0019] Compared with the prior art, the detection tube in the negative pressure cup assembly of this utility model is connected to the negative pressure detection meter through an adapter tube, so that the negative pressure detection meter can monitor the negative pressure value inside the negative pressure suction rod and the negative pressure suction nozzle in real time. Then, the negative pressure value data can be fed back to the formation system in the first time. The formation system can then take corresponding measures based on the feedback negative pressure value to ensure the safety of the battery cell and improve the formation quality of the battery cell. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the negative pressure cup assembly of this utility model;

[0021] Figure 2 This is an exploded view of the negative pressure cup assembly of this utility model;

[0022] Figure 3 This is a cross-sectional view of the negative pressure cup assembly of this utility model.

[0023] Explanation of reference numerals: 100, negative pressure cup body; 110, receiving cavity; 200, negative pressure suction rod; 210, first negative pressure channel; 300, negative pressure suction nozzle; 310, second negative pressure channel; 410, adapter tube; 420, negative pressure gauge; 500, detection tube; 510, detection hole; 600, mounting base; 610, through hole; 620, installation gap; 630, spring. Detailed Implementation

[0024] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 3 This utility model proposes a negative pressure cup assembly.

[0026] The negative pressure cup assembly includes a negative pressure cup body 100, a negative pressure suction rod 200, and a detection component. The negative pressure cup body 100 has a receiving cavity 110. The top of the negative pressure suction rod 200 is connected to the bottom of the negative pressure cup body 100 and communicates with the receiving cavity 110. A negative pressure suction nozzle 300 is sleeved on the negative pressure suction rod 200 and communicates with the negative pressure suction rod 200. The negative pressure suction nozzle 300 is used to communicate with the battery's liquid filling port. A detection tube 500 is connected to the negative pressure suction rod 200 and / or the negative pressure suction nozzle 300. The detection tube 500 is connected to a negative pressure gauge 420 through an adapter tube 410. The negative pressure gauge 420 can detect the negative pressure value inside the negative pressure suction rod 200 and / or the negative pressure suction nozzle 300.

[0027] Specifically, the negative pressure cup assembly is used in battery formation equipment to perform negative pressure formation on the battery cells and extract the electrolyte during the formation process. After entering the negative pressure formation process, the negative pressure source is turned on to draw the electrolyte inside the battery cell into the negative pressure cup 100 along with the gas through the negative pressure suction rod 200 and the negative pressure suction nozzle 300. The electrolyte is retained in the negative pressure cup 100. After the negative pressure formation process is completed, the negative pressure source is turned off, and the positive pressure source applies positive pressure to the negative pressure cup 100. This positive pressure is used to blow the electrolyte retained in the negative pressure cup 100 back into the battery cell, thereby achieving electrolyte recirculation. A detection tube 500 can be installed on the negative pressure suction nozzle 300, the negative pressure suction nozzle rod 200, or both. The key is that the detection tube 500 can be connected to the negative pressure meter 420 via the adapter pipe 410 to detect the negative pressure value and determine whether the negative pressure inside the negative pressure suction nozzle rod 200 and the negative pressure suction nozzle 300 is within the normal range. With this setup, the detection tube 500 is connected to the negative pressure meter 420 via the adapter pipe 410, allowing the negative pressure meter 420 to monitor the negative pressure value inside the negative pressure suction nozzle rod 200 and the negative pressure suction nozzle 300 in real time. This data can then be fed back to the formation system immediately, enabling the formation system to take appropriate measures based on the feedback negative pressure value to ensure cell safety and improve cell formation quality.

[0028] Please see Figures 1 to 3 Furthermore, a detection tube 500 is connected to the side wall of the negative pressure suction nozzle rod 200. In this way, the negative pressure detector 420 can detect the negative pressure inside the negative pressure suction nozzle rod 200 through the detection tube 500, and then feed it back to the formation system to ensure the quality of cell formation.

[0029] Please see Figures 1 to 3 Furthermore, the detection tube 500 and the negative pressure suction rod 200 are integrally formed. Specifically, this solution uses an integral molding method, which is simple to process; only the adapter tube 410 needs to be connected to the detection tube 500. Simultaneously, the negative pressure suction rod 200 and the detection tube 500 can be made of the same material, which simplifies the molding process. Of course, the detection tube 500 can also be connected to the negative pressure suction rod 200 via an adapter device, as long as the negative pressure gauge 420 can detect the internal negative pressure value of the negative pressure suction rod 200.

[0030] Please see Figures 1 to 3 Furthermore, in an upward direction, the detection tube 500 gradually extends away from the side wall of the negative pressure nozzle rod 200. In other embodiments, the detection tube 500 may also be directly perpendicular to the side wall of the negative pressure nozzle rod 200.

[0031] Please see Figures 1 to 3 Furthermore, the angle between the detection tube 500 and the negative pressure suction rod 200 is 30 to 60 degrees. For example, the angle between the detection tube 500 and the negative pressure suction rod 200 is 30 degrees, 45 degrees, 60 degrees, etc.

[0032] Please see Figures 1 to 3 Furthermore, the negative pressure suction rod 200 has a first negative pressure channel 210 inside, the negative pressure suction nozzle 300 has a second negative pressure channel 310 inside, and the detection tube 500 has a detection hole 510 inside. The first negative pressure channel 210 connects to the second negative pressure channel 310, and the two ends of the detection hole 510 connect the first negative pressure channel 210 and the adapter tube 410. Specifically, when the negative pressure cup body 100, the negative pressure suction rod 200, and the negative pressure suction nozzle 300 are assembled, the receiving cavity 110, the first channel, the second channel, and the detection hole 510 are interconnected. By setting the detection tube 500, the receiving cavity 110, the first channel, and the second channel are connected to the detection hole 510 and connected to the negative pressure meter 420 through the adapter tube 410 to detect the negative pressure value and determine whether the negative pressure inside the negative pressure suction rod 200 is within the normal range.

[0033] Please see Figure 2Furthermore, the cross-section of the detection tube 500 is circular. The circular shape of the detection tube 500 facilitates the connection of the adapter tube 410 to the detection tube 500. Simultaneously, the diameter of the adapter tube 410 can be larger than the diameter of the detection tube 500, allowing the adapter tube 410 to fit over the outer circumference of the detection tube 500 and communicate with it.

[0034] Furthermore, the adapter 410 is made of a flexible material. By making the adapter 410 a flexible tube, it can bypass the components of the battery formation equipment and connect to the first negative pressure channel 210 of the negative pressure gauge 420 and the negative pressure suction nozzle 200, which is beneficial for space arrangement. Specifically, the detection tube 500 can be made rigid to facilitate the connection of the adapter 410.

[0035] Furthermore, the transfer tube 410 is made of Teflon. Teflon material has the property of preventing electrolyte corrosion, ensuring the normal operation of the detection function.

[0036] Please see Figures 1 to 3 Furthermore, the negative pressure cup assembly also includes a mounting base 600, which has a through hole 610 through which the negative pressure suction rod 200 passes. The negative pressure suction rod 200 is movably inserted through the through hole 610. A mounting gap 620 is formed between the mounting base 600 and the negative pressure suction rod 200 at the through hole 610. A spring 630 is sleeved on the outer periphery of the negative pressure suction rod 200 and extends into the mounting gap 620. A detection tube 500 is located at the bottom of the negative pressure suction rod 200 and between the spring 630 and the negative pressure suction 300. Thus, when the negative pressure cup assembly is in use, it is driven downwards by the drive device on the battery formation equipment, allowing the negative pressure suction nozzle 300 on the negative pressure cup assembly to press against the electrolyte inlet of the battery cell. The spring 630 acts as a buffer when the negative pressure suction nozzle 300 presses against the electrolyte inlet, enhancing the stability of the negative pressure suction nozzle 300 at the battery electrolyte inlet. The detection tube 500 is located near the bottom of the negative pressure suction nozzle rod 200. The negative pressure gauge 420 can detect the negative pressure value inside the negative pressure suction nozzle rod 200 through the detection tube 500, making reasonable use of the idle position of the negative pressure suction nozzle rod 200 while ensuring the effectiveness of negative pressure detection.

[0037] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. All equivalent structural transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A negative pressure cup assembly, characterized in that, The negative pressure cup assembly includes: A negative pressure cup body having a receiving cavity; A negative pressure suction rod, the top of which is connected to the bottom of the negative pressure cup body and communicates with the receiving cavity; A negative pressure suction nozzle is sleeved on a negative pressure suction nozzle rod and connected to the negative pressure suction nozzle rod. The negative pressure suction nozzle is used to connect to the battery's liquid filling port. A detection tube is connected to the negative pressure suction nozzle rod and / or the negative pressure suction nozzle. The detection tube is connected to a negative pressure measuring instrument through an adapter tube. The negative pressure measuring instrument can detect the negative pressure value inside the negative pressure suction nozzle rod and / or the negative pressure suction nozzle.

2. The negative pressure cup assembly as described in claim 1, characterized in that, The detection tube is connected to the side wall of the negative pressure suction nozzle rod.

3. The negative pressure cup assembly as described in claim 2, characterized in that, The detection tube is integrally formed with the negative pressure suction nozzle rod.

4. The negative pressure cup assembly as described in claim 3, characterized in that, In the upward direction, the detection tube gradually extends away from the side wall of the negative pressure suction nozzle rod.

5. The negative pressure cup assembly as described in claim 4, characterized in that, The angle between the detection tube and the negative pressure suction nozzle rod is 30 to 60 degrees.

6. The negative pressure cup assembly as described in claim 3, characterized in that, The negative pressure suction nozzle rod has a first negative pressure channel inside, the negative pressure suction nozzle has a second negative pressure channel inside, the detection tube has a detection hole inside, the first negative pressure channel is connected to the second negative pressure channel, and the two ends of the detection hole are connected to the first negative pressure channel and the adapter tube.

7. The negative pressure cup assembly as described in claim 1, characterized in that, The detection tube has a circular cross-section.

8. The negative pressure cup assembly as described in claim 1, characterized in that, The adapter tube is made of a soft material.

9. The negative pressure cup assembly as described in claim 8, characterized in that, The adapter pipe is made of Teflon.

10. The negative pressure cup assembly as described in any one of claims 1 to 9, characterized in that, The negative pressure cup assembly also includes a mounting base with a through hole for the negative pressure suction nozzle rod to pass through. The negative pressure suction nozzle rod is movably inserted through the through hole. An installation gap is formed between the mounting base and the negative pressure suction nozzle rod at the through hole. A spring is sleeved on the outer periphery of the negative pressure suction nozzle rod and extends into the installation gap. The detection tube is located at the bottom of the negative pressure suction nozzle rod and between the spring and the negative pressure suction nozzle.

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