Battery cell liquid absorption amount detection device

Abstract

The utility model discloses a device for detecting the liquid absorption amount of a battery cell, which comprises a detection box, the interior of the detection box is hollow to form a cavity, the cavity is provided with the battery cell, and the bottom of the detection box is provided with a weight measuring mechanism; the electrolyte barrel is communicated with the detection box through a liquid injection pipeline; the waste liquid barrel is communicated with the detection box through a liquid discharge pipeline; and the main control equipment is used for receiving the weight measuring signals sent by the weight measuring mechanism before and after liquid injection of the battery cell so as to obtain the liquid absorption amount of the battery cell. According to the utility model, the weight of the battery cell can be calculated by injecting and discharging the electrolyte into and out of the detection box with the battery cell, manual intervention is not needed, the liquid absorption amount of the battery cell can be automatically detected and recorded, and the working efficiency and the detection precision are improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a device for detecting the amount of liquid absorbed by a battery cell. Background Technology

[0002] As a crucial component of battery cells, electrolytes play a vital role in the electrical and safety performance of the cells. The electrolyte is like the blood within the battery cell, through which charged ions are transported and inserted or extracted. Excessive electrolyte can cause the battery to overheat or even fail directly, while insufficient electrolyte may lead to a sharp decline in cycle performance.

[0003] Currently, the importance of electrolyte injection volume to cell design is self-evident. Traditional testing methods involve immersing the cell in electrolyte and manually removing it for measurement to detect changes in cell weight. This method requires multiple contacts with the electrolyte, and during handling, some electrolyte drips from the cell, causing harm to the environment and human health, while also wasting labor costs. Furthermore, during manual cell handling and measurement, electrolyte residue on hands or dripping onto the ground can lead to a decrease in cell weight, causing inaccurate weighing and resulting in inaccurate test results. Utility Model Content

[0004] To overcome at least one of the defects described in the prior art, this utility model provides a battery cell electrolyte absorption detection device. The weight of the battery cell can be calculated by injecting and discharging electrolyte into a detection box containing the battery cell, without manual intervention. This automatically completes the detection and recording of the battery cell electrolyte absorption, improving work efficiency and detection accuracy.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A battery cell liquid absorption detection device includes: a detection box, the detection box having a hollow interior forming a cavity, the cavity being filled with a battery cell, and a weighing mechanism at the bottom of the detection box; an electrolyte tank, the electrolyte tank being connected to the detection box via an injection pipe; a waste liquid tank, the waste liquid tank being connected to the detection box via a drain pipe; and a main control device, the main control device being used to receive weighing signals from the weighing mechanism before and after battery cell liquid injection, so as to obtain the liquid absorption of the battery cell.

[0007] By adopting the above scheme, the weight of the battery cell placed in the test box can be measured by a weighing mechanism. Then, after adding electrolyte, the weight of the battery cell can be measured by the weighing mechanism. The difference between the weights before and after can be used to determine the saturated electrolyte absorption of the battery cell. The measurement is accurate and there is no need for manual repeated handling of the battery cell.

[0008] Furthermore, the side wall of the detection box has an opening, the opening is provided with a removable sealing cover, and a sealing layer is provided between the sealing cover and the detection box.

[0009] By adopting the above solution and setting an opening, it is easy to insert the battery cell, and the sealing layer can ensure that the test box maintains a good sealing and isolation effect from the outside world.

[0010] Furthermore, parallel slide rails are provided on both sides of the opening of the detection box, and the sealing cover is provided with a sliding structure that is slidably connected to the parallel slide rails.

[0011] By adopting the above solution, the sliding assembly's sealing cover is tightly sealed and easy to open and close.

[0012] Furthermore, in the parallel slide rail and the sliding structure, one is an outwardly protruding rib structure and the other is an inwardly recessed groove structure, and the rib structure and the groove structure cooperate with each other.

[0013] By adopting the above solution, the sliding effect can be improved while simultaneously achieving the sealing effect.

[0014] Furthermore, a monitoring pipe communicating with the outside is provided inside the cavity. The monitoring pipe is arranged vertically, and the side wall of the monitoring pipe is connected to the inner side wall of the detection box. A water inlet space is left between the bottom of the monitoring pipe and the bottom of the detection box.

[0015] By adopting the above scheme, the monitoring pipeline exhibits obvious capillary action, which helps determine whether the battery cell is saturated with electrolyte and facilitates the calculation of the rate of change of the liquid level inside the monitoring pipeline, thereby determining whether the liquid level is stable.

[0016] Furthermore, the electrolyte tank is equipped with a delivery pump for conveying electrolyte into the cavity of the detection box, the delivery pump being electrically connected to the main control equipment, and / or, the waste liquid tank is equipped with a suction pump for absorbing electrolyte in the cavity of the detection box, the suction pump being electrically connected to the main control equipment.

[0017] By adopting the above scheme, electrolyte can be delivered or discharged into the cavity of the detection box.

[0018] Furthermore, the diameter R1 of the monitoring pipe satisfies the following range: 1mm≤R1≤5mm.

[0019] By adopting the above scheme, capillary action is more obvious in the diameter range of 1mm-5mm, and the stability of the liquid level change can be used to determine whether the cell is saturated with electrolyte.

[0020] Furthermore, the sealing cover is also provided with a push-pull device.

[0021] By adopting the above method, it is easier to manually open or close the sealing cover.

[0022] Furthermore, the monitoring pipeline is provided with graduation lines, and / or, an infrared identification device for identifying the liquid level height inside the monitoring pipeline is provided outside the detection box.

[0023] By adopting the above scheme, the scale line can facilitate personnel to observe the liquid level and changes in the liquid level, and can also intelligently detect the liquid level and changes in the liquid level through an infrared recognition device, thereby realizing intelligent detection.

[0024] Furthermore, it also includes power supply equipment for supplying power to the main control equipment.

[0025] By adopting the above solution, power can be supplied to some main control equipment that does not have its own power supply.

[0026] In summary, the battery cell liquid absorption detection device provided by this utility model has the following technical effects:

[0027] 1. During the testing process, there is no need for manual contact with the battery cell, so there is no issue of electrolyte contamination of the environment or contact hazard to the human body;

[0028] 2. It can achieve intelligent detection, which is more reliable and produces more accurate test data compared to manual operation;

[0029] 3. Because the cavity of the detection box is sealed and isolated from the outside world when electrolyte is added, there is no external contamination, and the electrolyte can be reused;

[0030] 4. By adopting a main control equipment to replace manual calculation, the efficiency of calculation and detection is significantly improved. Attached Figure Description

[0031] Figure 1 This is a simplified model structural diagram of an embodiment of the present utility model;

[0032] Figure 2 This is a schematic diagram of the principle block structure of an embodiment of the present utility model.

[0033] The meanings of the reference numerals in the attached drawings are as follows: 1. Detection box; 11. Cavity; 12. Opening; 121. Parallel slide rail; 13. Sealing cover; 131. Sliding structure; 14. Sealing layer; 15. Push-pull device; 2. Monitoring pipe; 21. Scale line; 3. Weighing mechanism; 4. Electrolyte tank; 41. Transfer pump; 42. Injection pipe; 5. Waste liquid tank; 51. Suction pump; 52. Drainage pipe; 6. Main control equipment; 7. Infrared identification device; 8. Power supply equipment; 9. Battery cell. Detailed Implementation

[0034] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0035] To facilitate understanding of the embodiments of this utility model, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0038] See Embodiment 1 of this utility model. Figures 1-2 As shown, a battery cell liquid absorption detection device is disclosed, including a detection box 1, an electrolyte tank 4, a waste liquid tank 5, a main control unit 6, and a power supply unit 8. The detection box 1 is, but is not limited to, a rectangular box or a cylindrical box. The detection box 1 has a hollow cavity 11 inside, which can accommodate the battery cell 9. A monitoring pipe 2 communicating with the outside is provided in the cavity 11. A weighing mechanism 3 is provided at the bottom of the detection box 1. The weighing mechanism 3 can be a spring scale or an electronic scale. The detection box 1 and the weighing mechanism 3 can be integrated. The detection box 1 is assembled or directly placed on the weighing mechanism 3; the electrolyte tank 4 is connected to the detection box 1 through the injection pipe 42, and the waste liquid tank 5 is connected to the detection box 1 through the drain pipe 52, thereby realizing the injection or discharge of electrolyte into the cavity 11 of the detection box 1. The power supply equipment 8 and the weighing mechanism 3 are both electrically connected to the main control equipment 6. The main control equipment 6 receives the weighing signal of the weighing mechanism 3, which is beneficial for measuring the cell 9 before and after liquid absorption, thereby calculating the amount of liquid absorbed by the cell 9.

[0039] In some embodiments, the monitoring pipe 2 can be omitted. When the weighing mechanism 3 detects that the cell weight is no longer changing, it proves that the cell is saturated with liquid. At this time, the cell weight before and after liquid injection can be calculated, thereby calculating the amount of liquid absorbed by the cell 9.

[0040] In this embodiment 1, the detection box 1 is a rectangular box, and an opening 12 is provided on the side wall of the detection box 1. The opening 12 is provided with a removable sealing cover 13, and a sealing layer 14 is provided between the sealing cover 13 and the detection box 1. The sealing layer 14 is preferably rubber or foam. Specifically, the opening 12 is located on the top surface of the rectangular box. By providing the opening 12, it is easy to insert the battery cell 9. The sealing layer 14 can ensure that the detection box 1, except for the monitoring pipe 2, maintains a good sealing and isolation effect from the outside world, so that the monitoring pipe 2 has obvious capillary phenomenon, which helps to determine whether the battery cell 9 is saturated with electrolyte. The detection box 1 has parallel slide rails 121 on both sides of the opening 12. The sealing cover 13 has a sliding structure 131 that slides with the parallel slide rails 121. The slidingly assembled sealing cover 13 provides a tight seal and is easy to open and close. One of the parallel slide rails 121 and the sliding structure 131 is an outwardly protruding rib structure, and the other is an inwardly recessed groove structure. The rib structure and the groove structure cooperate with each other. The cross-sectional shapes of the rib structure and the groove structure include, but are not limited to, teardrop, trapezoidal, toothed, or T-shaped shapes. This improves the sliding effect while ensuring a good seal. The weight of the battery cell 9 placed in the detection box 1 can be easily measured by the weighing mechanism 3. After adding electrolyte and waiting for the liquid level in the monitoring pipe 2 to stabilize, the electrolyte is drained, and the weight of the battery cell 9 is measured again by the weighing mechanism 3. The difference in weight before and after measurement yields the saturated liquid absorption of the battery cell 9. The test is accurate and eliminates the need for repeated manual handling of the battery cell 9.

[0041] It should be noted that in other embodiments, the opening 12 can be located above the side wall of the detection box 1. The opening 12 can also be inclined, so that the parallel slide rails 121 are located on the top and side surfaces of the detection box 1, respectively. The sealing cover 13 is set along the inclined direction of the opening 12, which is more conducive to inserting the battery cell 9. Of course, the opening 12 can also be designed in other shapes, so that the sealing cover 13 and the opening 12 are hinged or rotated. This embodiment does not impose specific limitations, as long as the battery cell 9 can be inserted and a sealing effect can be achieved. The minimum height of the opening 12 needs to be higher than the height of the electrolyte, and the electrolyte height needs to completely submerge the battery cell 9. In some embodiments, in order to facilitate the opening and closing of the sealing cover 13, a push-pull device 15 can be optionally provided on the sealing cover 13, which is conducive to manually opening or closing the sealing cover 13.

[0042] To improve the detection effect of the monitoring pipeline, in this embodiment 1, the monitoring pipeline 2 is set vertically, and the lower side wall of the monitoring pipeline 2 is connected to the inner side wall of the detection box 1. A water inlet space is left between the bottom of the monitoring pipeline 2 and the bottom of the detection box 1. The upper end of the monitoring pipeline 2 extends outward through the top wall of the detection box 1. The extension length needs to be longer than the capillary rise of the internal electrolyte, so as to facilitate the calculation of the change rate by monitoring the liquid level inside the monitoring pipeline 2, thereby determining whether the liquid level is stable.

[0043] It should be noted that the diameter R1 of the monitoring pipe 2 meets the following range: 1mm ≤ R1 ≤ 5mm. Within the diameter range of 1mm-5mm, capillary action is more pronounced. The stability of the liquid level change can be used to determine whether the battery cell 9 is saturated with electrolyte. When the liquid level is stable, it proves that the battery cell 9 is saturated with electrolyte. To make it more intuitive to manually observe the liquid level fluctuation in the monitoring pipe 2, optionally, a scale line 21 can be provided on the monitoring pipe 2 to facilitate personnel observation of the liquid level height and changes.

[0044] In order to enable the main control equipment 6 to intelligently control the injection and discharge of electrolyte, a delivery pump 41 is provided in the electrolyte tank 4 to deliver electrolyte into the cavity 11 of the detection box 1. The delivery pump 41 is electrically connected to the main control equipment 6. And / or, a suction pump 51 is provided in the waste liquid tank 5 to absorb electrolyte in the cavity 11 of the detection box 1. The suction pump 51 is electrically connected to the main control equipment 6, which can realize the delivery or discharge of electrolyte into the cavity 11 of the detection box 1. In this embodiment 1, both the delivery pump 41 and the suction pump 51 are present, and the main control equipment 6 is a smart computer or a laptop computer, and the power supply equipment 8 is the power cord of the smart computer or laptop computer. The control effect can be achieved through the internal program of the computer. In other embodiments, the main control equipment 6 and the power supply equipment 8 are not specifically limited, and in order to completely absorb the electrolyte in the detection box 1, the bottom wall of the detection box 1 can be provided with a slope to assist the suction pump 51 in completely absorbing the electrolyte in the detection box 1, thereby improving the test accuracy.

[0045] In some embodiments, to achieve intelligent detection, an infrared identification device 7 for identifying the liquid level in the monitoring pipe 2 is also provided outside the detection box 1. The infrared identification device 7 can intelligently detect the liquid level and its changes, thus achieving intelligent detection instead of manual detection. It should be noted that in this embodiment 1, the main control device can be connected to the weighing mechanism 3, the delivery pump 41, the suction pump 51, and the infrared identification device 7 via wired or wireless connection, as long as data transmission is possible.

[0046] The specific steps for detecting the amount of liquid absorbed are as follows:

[0047] First, open the sealing cover 13 and insert the battery cell 9, then close the sealing cover 13. At this time, the main control equipment 6 sends a weighing command to the weighing mechanism 3 and records the weighing data M1. The main control equipment 6 controls the electrolyte tank 4 to automatically extract a certain amount of electrolyte into the cavity 11 of the detection box 1. At this time, the main control equipment 6 sends a weighing command to the weighing mechanism 3 and records the weighing data M2. The infrared identification device 7 or manual identification monitors the liquid level inside the monitoring pipe 2. When the liquid level remains stable for a period of time, it is considered that the battery cell has completely absorbed the liquid. At this time, the main control equipment 6 sends a weighing command to the weighing mechanism 3 and records the weighing data M3. The main control equipment 6 calculates the difference between M3 and M1 to obtain the saturated liquid absorption of the battery cell 9.

[0048] In summary, the battery cell liquid absorption detection device provided by this utility model has the following technical effects:

[0049] 1. During the testing process, there is no need for manual contact with the battery cell, so there is no issue of electrolyte contamination of the environment or contact hazard to the human body;

[0050] 2. It can achieve intelligent detection, which is more reliable and produces more accurate test data compared to manual operation;

[0051] 3. Because the cavity of the detection box is sealed and isolated from the outside world when electrolyte is added, there is no external contamination, and the electrolyte can be reused;

[0052] 4. By adopting a main control equipment to replace manual calculation, the efficiency of calculation and detection is significantly improved.

[0053] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A device for detecting the amount of liquid absorbed by a battery core, characterized in that: include: A detection box (1), wherein the interior of the detection box (1) is hollow to form a cavity (11), the cavity (11) is provided with a battery cell, and a weight measuring mechanism (3) is provided at the bottom of the detection box (1); An electrolyte barrel (4), the electrolyte barrel (4) being connected to the detection box (1) via a liquid injection pipe (42); A waste liquid barrel (5), the waste liquid barrel (5) being connected to the detection box (1) via a liquid discharge pipe (52); The main control equipment (6) is used to receive the weighing signal before and after the battery cell is filled with liquid sent by the weighing mechanism (3) to obtain the amount of liquid absorbed by the battery cell.

2. A device for detecting the amount of liquid absorbed by a battery core according to claim 1, characterized in that: The side wall of the detection box (1) is provided with an opening (12), the opening (12) is provided with a detachable sealing cover (13), and a sealing layer (14) is provided between the sealing cover (13) and the detection box (1).

3. A device for detecting the amount of liquid absorbed by a battery core according to claim 2, characterized in that: Parallel slide rails (121) are arranged on both sides of the opening (12) of the detection box (1), and the sealing cover (13) is provided with a sliding structure (131) slidably connected to the parallel slide rails (121).

4. A device for detecting the amount of liquid absorbed by a battery core according to claim 3, characterized in that: One of the parallel slide rail (121) and the sliding structure (131) is a convex rib structure protruding outwards, and the other is a groove structure recessed inwards, and the convex rib structure and the groove structure cooperate with each other.

5. A device for detecting the amount of liquid absorbed by a battery core according to any one of claims 1 to 4, characterized in that: A monitoring pipe (2) communicating with the outside is arranged in the cavity (11); the monitoring pipe (2) is arranged in a vertical direction, and the side wall of the monitoring pipe (2) is connected to the inner side wall of the detection box (1); a water inlet space is left between the bottom of the monitoring pipe (2) and the bottom of the detection box (1).

6. A device for detecting the amount of liquid absorbed by a battery core according to any one of claims 1 to 4, characterized in that: The electrolyte barrel (4) is provided with a delivery pump (41) for delivering electrolyte to the cavity (11) of the detection box (1), and the delivery pump (41) is electrically connected to the main control equipment (6); and / or, the waste liquid barrel (5) is provided with a suction pump (51) for absorbing the electrolyte in the cavity (11) of the detection box (1), and the suction pump (51) is electrically connected to the main control equipment (6).

7. A device for detecting the amount of liquid absorbed by a battery core according to claim 5, characterized in that: The diameter R1 of the monitoring pipe (2) satisfies the following range: 1 mm ≤ R1 ≤ 5 mm.

8. A device for detecting the amount of liquid absorbed by a battery core according to any one of claims 2 to 4, characterized in that: The sealing cover (13) is also provided with a push-pull device (15).

9. A device for detecting the amount of liquid absorbed by a battery core according to claim 5, characterized in that: The monitoring pipe (2) is provided with scale lines (21), and / or the detection box (1) is provided with an infrared recognition device (7) outside for identifying the height of the liquid level in the monitoring pipe (2).

10. A device for detecting the amount of liquid absorbed by a battery core according to any one of claims 1 to 4, characterized in that: It also includes a power supply device (8), wherein the power supply device (8) is used to supply power to the main control equipment (6).

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