Liquid injection flow monitoring device

Abstract

The utility model discloses a liquid injection flow monitoring device which is communicated with a pinch valve and comprises a liquid injection pipe and a liquid injection nozzle which are used for circulating electrolyte, and further comprises a sensor which is connected with the liquid injection pipe and is used for monitoring the circulating condition of the electrolyte in the liquid injection pipe. The sensor is arranged on the outer wall of the liquid injection pipe, so that the circulation condition of electrolyte in the liquid injection pipe can be monitored, whether the battery cell is in an absorbable state or not can be predicted according to the flow condition, and when the battery cell is in a non-absorbable state or is poor in absorption effect, the next circulation process is carried out, the liquid injection time is shortened, and the liquid injection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a liquid injection flow monitoring device. Background Art

[0002] Batteries generally include positive electrodes, negative electrodes, diaphragms and electrolytes, among which the electrolyte flows between the positive and negative electrodes of the battery and plays the role of conducting electrons, and is also the guarantee for the high performance of the battery. In the process of filling lithium-ion batteries, the electrolyte is mainly injected into the battery cell through the injection nozzle by means of an injection pump under pressure. However, in the actual injection process, there are the following problems: (1) During the pressurization process, it is impossible to predict the state of electrolyte absorption by the battery cell, and the injection can only be performed according to the pre-set process cycle parameters, and the injection efficiency is low; (2) At the end of the injection, it is impossible to know whether there is any electrolyte remaining in the device. If there is electrolyte remaining, when the battery cell is removed, it will cause the electrolyte to flow out and be wasted; (3) When changing the battery cell model, it is necessary to manually test the process parameters gradually, which consumes manpower and material resources and has low production line efficiency. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a liquid injection flow monitoring device, which can monitor the flow of electrolyte in the liquid injection tube, shorten the liquid injection time, and improve the liquid injection efficiency.

[0004] The technical solution of the utility model to solve the above problems is as follows:

[0005] A liquid injection flow monitoring device comprises a liquid injection pipe and a liquid injection nozzle, and also comprises a sensor arranged on the liquid injection pipe for monitoring the flow of electrolyte in the liquid injection pipe.

[0006] Preferably, the sensor is sleeved on the outer circumference of the injection tube.

[0007] Preferably, the injection tube is surrounded by support components for protecting the injection tube, and the support components include a top seat above the injection tube, a support platform below the injection tube, and a plurality of support rods vertically arranged between the top seat and the support platform.

[0008] Preferably, the top seat is arranged parallel to the support platform; and the injection pipe is perpendicular to the top seat.

[0009] Preferably, the device further comprises a base for mounting the liquid injection nozzle, and the liquid injection nozzle is mounted below the base.

[0010] Preferably, the base is arranged below the support platform.

[0011] Preferably, a first straight-through ferrule joint is provided between the injection pipe and the base for enhancing the sealing property of the injection pipeline.

[0012] Preferably, the device further comprises a tube clamping valve connected to the injection tube; a second straight-through ferrule joint for enhancing the sealing property of the injection pipeline is provided between the injection tube and the tube clamping valve.

[0013] The utility model has the following beneficial effects:

[0014] (1) The utility model installs a sensor on the outer wall of the injection tube, which can monitor the flow of electrolyte in the injection tube and predict whether the battery cell is in an absorbable state. When it is in an unabsorbable state or the absorption effect is poor, the next cycle process is carried out, thereby shortening the injection time and improving the injection efficiency;

[0015] (2) The utility model installs a sensor on the outer wall of the injection tube. If electrolyte still remains in the injection tube after the injection is completed, an alarm can be triggered, effectively preventing the electrolyte from flowing out and being wasted after the battery cell is removed;

[0016] (3) The utility model installs a sensor on the outer wall of the injection tube. When the battery cell model changes, the process parameters are quickly adjusted according to the electrolyte flow in the injection tube detected by the sensor, thereby reducing the loss of manpower and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] In the figure: 1-pinch valve, 2-liquid injection tube, 3-sensor, 4-liquid injection nozzle, 5-support assembly, 51-top seat, 52-support platform, 53-support column, 6-base, 71-first straight-through ferrule connector, 72-first straight-through ferrule connector. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the utility model and the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] A liquid injection flow monitoring device is connected to the pinch valve 1, such as Figure 1 As shown, it includes a support assembly 5 and a liquid injection assembly. The liquid injection assembly includes a liquid injection tube 2 connected to a pinch valve 1, and a liquid injection nozzle 4 is connected below the liquid injection tube 2. The electrolyte flows through the pinch valve 1 and the liquid injection tube 2 in sequence, and then enters the battery cell through the liquid injection nozzle 4. In order to prevent the electrolyte from overflowing, the liquid injection tube 2 and the pinch valve 1 are connected by a first straight ferrule joint 71 to enhance the sealing of the pipeline.

[0021] In addition, in order to install the injection nozzle 4 and further improve the sealing of the pipeline, a base 6 is provided between the injection tube 2 and the injection nozzle 4. The injection nozzle 4 is sleeved on the lower end of the base 6, and the injection tube 2 is connected to the base 6 via a second straight-through ferrule joint 72.

[0022] When injecting liquid into the battery, in order to improve the injection efficiency and prevent the electrolyte from overflowing and wasting, it is necessary to apply downward pressure to the device so that the injection nozzle 4 fits tightly with the battery cell. However, the injection tube 2 above the injection nozzle 4 is prone to deformation after being subjected to a large pressure, which affects the injection. Therefore, a support assembly 5 is provided on the periphery of the injection tube 2 to protect the injection tube 2. The support assembly 5 includes a top seat 51 provided below the clamping valve 1 and a support platform 52 provided above the base 6. The top seat 51 and the support platform 52 are parallel to each other and are perpendicular to the injection tube 2. A plurality of support rods 53 are vertically installed between the top seat 51 and the support platform 52 to protect the injection tube 2 and prevent it from being deformed due to excessive pressure.

[0023] In addition, a sealing ring is provided between the support platform 52 and the base 6 to improve the sealing performance of the pipeline and prevent leakage of the electrolyte.

[0024] In order to detect the circulation of electrolyte in the pipeline, a sensor 3 is attached to the outer wall of the injection tube 2 to monitor the flow value of electrolyte in the injection tube 2 in real time, and judge the degree of electrolyte absorption by the battery core according to the flow value in the tube. When the battery core is in an unabsorbable state or the absorption effect is poor, that is, the electrolyte flow value in the injection tube 2 is weak or lower than the set value, the next cycle process can be directly carried out in advance, which shortens the injection time and improves the injection efficiency. And when the injection cycle process is over, if there is still electrolyte in the injection tube 2, the sensor 3 will sound an alarm to avoid the waste caused by the residual electrolyte in the injection tube 2 after the injection nozzle 4 is separated from the battery core. In addition. If the injection battery core model needs to be replaced, the worker can quickly adjust the process parameters according to the electrolyte circulation in the injection tube 2 detected by the sensor 3, reducing the loss of manpower and material costs.

Claims

1. A liquid injection flow monitoring device, characterized in that: It comprises a liquid injection tube (2) and a liquid injection nozzle (4), and also comprises a sensor (3) arranged on the liquid injection tube (2) for monitoring the flow of electrolyte in the liquid injection tube (2); the sensor (3) is sleeved on the outer periphery of the liquid injection tube (2).

2. The liquid injection flow monitoring device according to claim 1, characterized in that: The injection pipe (2) is provided with a support assembly (5) for protecting the injection pipe (2) around its periphery. The support assembly (5) comprises a top seat (51) provided above the injection pipe (2), a support platform (52) provided below the injection pipe (2), and a plurality of support rods (53) vertically provided between the top seat (51) and the support platform (52).

3. The liquid injection flow monitoring device according to claim 2, characterized in that: The top seat (51) is arranged in parallel with the support platform (52); and the injection pipe (2) is perpendicular to the top seat (51).

4. The liquid injection flow monitoring device according to claim 2, characterized in that: The device further comprises a base (6) for mounting the liquid injection nozzle (4), wherein the liquid injection nozzle (4) is mounted below the base (6).

5. The liquid injection flow monitoring device according to claim 4, characterized in that: The base (6) is arranged below the support platform (52).

6. The liquid injection flow monitoring device according to claim 4, characterized in that: A first straight-through ferrule joint (71) for enhancing the sealing performance of the liquid injection pipeline is provided between the liquid injection pipe (2) and the base (6).

7. The liquid injection flow monitoring device according to claim 1, characterized in that: The device further comprises a tube clamping valve (1) connected to the liquid injection tube (2); a second straight-through ferrule joint (72) for enhancing the sealing performance of the liquid injection pipeline is provided between the liquid injection tube (2) and the tube clamping valve (1).

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