Battery cell liquid leakage detection device
The battery cell leakage detection device, which combines an oven and a humidifier with litmus paper, solves the problem of difficult leakage identification during battery cell manufacturing, and improves detection accuracy and finished product qualification rate.
Patent Information
- Application Number
- CN202520169272.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-23
AI Technical Summary
In the existing technology, pouch battery cells are prone to damage or delamination during the manufacturing process due to improper handling. This makes it difficult to fully identify the leakage through visual inspection, affecting the cell's energy density, volume, and finished product qualification rate.
A detection device combining an oven and a humidifier with litmus paper is used. By accelerating the reaction of acidic gas generated by the leaking battery cell with litmus paper, the color change of the litmus paper is used to detect whether there is leakage in the battery cell, thus improving the accuracy of detection.
It enables accurate detection of cell leakage, improves the pass rate of finished cells and testing efficiency, and avoids leakage problems that go undetected due to minor external damage.
Smart Images
Figure CN223727348U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of battery detection, in particular to a battery leakage detection device. BACKGROUND
[0002] Soft package battery is the third generation of lithium battery developed on the basis of the original steel shell, aluminum shell and plastic shell battery. Soft package battery is widely favored by domestic and foreign users due to its advantages of lighter, thinner, good safety performance, high appearance requirement, high energy density, stable discharge platform, excellent power performance, environmental protection and no pollution. Soft package battery products are widely used in electric vehicles, mobile power sources, digital electronic products, intelligent wearable products, electric toys and many other fields.
[0003] Nowadays, the market has higher and higher requirements for the energy density, volume and performance of the battery, and the appearance of the battery is also getting higher and higher. If there is a pressure mark on the surface of the battery during the manufacturing process of the soft package battery, the battery may leak, which greatly affects the energy density of the battery, makes the battery unable to reduce the volume well, and the battery sticker is also affected, ultimately affecting the qualified rate of the finished battery and the production efficiency.
[0004] In related technologies, in order to avoid problems in the appearance of the battery, the appearance of the battery usually needs to be checked. However, the battery is relatively soft, and the detection process is prone to damage due to improper operation. The battery is also prone to delamination and leakage during packaging. It is impossible to completely identify and pick out defective products by appearance inspection. Utility model content
[0005] To solve or partially solve the problems in the related art, the present application provides a battery leakage detection device which can accurately detect the leakage of the battery surface.
[0006] The first aspect of the present application provides a battery leakage detection device, which comprises an oven, a humidifier and a detection mechanism; the humidifier is located in the oven, and the humidifier is used to adjust the humidity in the oven; the detection mechanism is located in the oven, and the detection mechanism comprises a storage site and a litmus paper, the storage site is used to store the battery, and the litmus paper is placed in the storage site.
[0007] Further, the detection mechanism comprises a plurality of storage boxes, the storage site is located in the storage box, and the storage box is stacked in the oven.
[0008] Further, the litmus paper is a plurality of, and the litmus paper corresponds to the storage box one by one.
[0009] Further, the storage box is provided with an opening, and the opening faces upward.
[0010] Further, the litmus paper is placed at the opening.
[0011] Further, the humidifier comprises a water tank, a top end of the water tank is provided with a tank opening, the water tank is used for storing water, and the water tank releases water vapor through the tank opening.
[0012] Further, the length of the water tank is 40-50 cm, the width of the water tank is 20-30 cm, and the depth of the water tank is 10-20 cm.
[0013] Further, the height of the liquid level in the water tank is 60-80% of the depth of the water tank.
[0014] Further, the humidifier comprises a liquid level sensor, the liquid level sensor is installed on the water tank, and the liquid level sensor is used for detecting the liquid level of the water tank.
[0015] Further, the humidifier comprises a water filling pipe and a water valve, the water filling pipe is in communication with the water tank, and the water valve is installed on the water filling pipe.
[0016] The technical scheme provided in the application can have the following beneficial effects: the storage site is arranged to store the battery cell, the litmus paper is placed on the storage site, the oven and the humidifier are used to accelerate the generation of acidic gas by the leaking battery cell, the generated acidic gas reacts with the litmus paper, and thus the discoloration of the litmus paper can be used to understand whether the battery cell is damaged and leaks, the appearance damage of the battery cell is avoided, and the precision of the battery cell detection is improved, and the qualified rate of the battery cell product is improved.
[0017] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS
[0018] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the different views of the drawings.
[0019] Figure 1 is a structural schematic diagram of a battery cell leakage detection device shown in an embodiment of the application.
[0020] The reference signs: oven 1, humidifier 2, water tank 21, water filling pipe 22, detection mechanism 3, storage site 31, litmus paper 32, storage box 33, and battery cell 100. DETAILED DESCRIPTION
[0021] Embodiments of the present application will be described in more detail with reference to the drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.
[0022] It should be understood that, although the terms "first", "second", "third", etc. are used to describe various information in the present application, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.
[0023] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0024] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0025] In the related art, in order to avoid the appearance problem of the battery cell, it is usually necessary to check the appearance of the battery cell. However, the battery cell is relatively soft, and the detection process is prone to damage due to improper operation. When the battery cell is packaged, delamination and liquid leakage are prone to occur. The appearance of the whole detection cannot completely identify and pick out defective products. In view of the above problems, the present application provides a battery cell liquid leakage detection device, which can accurately detect the liquid leakage on the surface of the battery cell.
[0026] The technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings.
[0027] Figure 1 is a structural schematic diagram of a battery cell liquid leakage detection device.
[0028] Referring to Figure 1 , the battery cell 100 liquid leakage detection device comprises an oven 1, a humidifier 2, and a detection mechanism 3. The humidifier 2 is located in the oven 1, and the humidifier 2 is used to adjust the humidity in the oven 1, preferably the humidity in the oven 1 is controlled at 50-90%. The detection mechanism 3 is located in the oven 1, and the detection mechanism 3 comprises a storage site 31 and a litmus paper 32, the storage site 31 is used to store the battery cell 100, and the litmus paper 32 is placed in the storage site 31. Since the battery cell 100 with indentation or damage to the outer tube is prone to liquid leakage, the liquid leaked by the liquid leakage battery cell 100 is mostly acidic liquid, the leaked acidic liquid is volatile, the volatile acidic liquid will produce acidic gas, and the litmus paper 32 can react with the acidic gas, so that the litmus paper 32 turns yellow, so the litmus paper 32 can be used to detect whether the battery cell 100 has a liquid leakage phenomenon.
[0029] The oven 1 can bake the battery cell 100 in the oven 1, thereby accelerating the liquid leakage condition of the liquid leakage battery cell 100. The humidifier 2 can release water vapor in the oven 1, thereby adjusting the humidity of the internal environment of the oven 1, accelerating the reaction between the litmus paper 32 and the acidic gas released by the liquid leakage battery cell 100, in order to ensure that the litmus paper 32 and the acidic gas released by the liquid leakage battery cell 100 fully react, and improve the accuracy of detection, the baking time of the oven 1 is greater than or equal to two hours, wherein the battery cell 100 needs to be kept in a stationary state, preferably the baking time of the oven 1 is two to six hours. The baking temperature of the oven 1 is kept at 40-50°C, so that the battery cell 100 and the litmus paper 32 are in an environment of 40-50°C.
[0030] The present application stores the battery cell 100 by setting the storage site 31, places the litmus paper 32 in the storage site 31, uses the oven 1 and the humidifier 2 to accelerate the generation of acidic gas by the liquid leakage battery cell 100, makes the generated acidic gas react with the litmus paper 32, thereby understanding whether the battery cell 100 has a damage and liquid leakage condition through the discoloration of the litmus paper 32, avoiding that the appearance damage of the battery cell 100 is too small to be observed, thereby improving the accuracy of the battery cell 100 detection and improving the qualified rate of the finished battery cell 100.
[0031] The detection mechanism 3 comprises a plurality of storage boxes 33, the storage positions 31 are located in the storage boxes 33, and the storage boxes 33 are arranged in a stacked manner in the oven 1. The stacked storage boxes 33 can save the internal space of the oven 1, so that a plurality of battery cells 100 can be detected at one time. When it is necessary to arrange the storage boxes 33 in the oven 1 and arrange them in a stacked manner, the storage boxes 33 can be placed in the oven 1 by hand or a mechanical hand, preferably, the plurality of storage boxes 33 are arranged in a stacked manner in the oven 1 by a mechanical hand, so as to ensure that the storage boxes 33 are arranged in a stacked and neat manner. After the oven 1 is baked, the oven 1 can be opened, the storage boxes 33 are taken out one by one by the mechanical hand, and then a worker observes the discoloration of the litmus paper on the storage boxes 33.
[0032] The litmus paper 32 is a plurality of litmus papers, and the litmus paper 32 corresponds to the storage box 33 one by one. Each storage box 33 corresponds to a storage position 31, and each storage position 31 can place one battery cell 100, so that each litmus paper 32 can detect the corresponding battery cell 100, and the worker can accurately find out which battery cell 100 has the problem of liquid leakage.
[0033] The storage box 33 is provided with an opening, and the battery cell 100 can be placed in the storage position 31 in the storage box 33 from the opening. In some embodiments, the opening faces upward, the storage box 33 is made of a hard material, the storage box 33 can protect the battery cell 100 from being crushed, and the top end of the storage box 33 is higher than the top end of the battery cell 100 received in the storage box 33, so as to ensure that the upper storage box 33 will not press the battery cell 100, and to avoid test errors; the upper storage box 33 can also cover the opening of the lower storage box 33, so as to avoid the acidic gas generated by the upper battery cell 100 from affecting the litmus paper 32 in the lower storage box 33, thereby improving the accuracy of detection. In some embodiments, the opening faces the horizontal direction, and the battery cell 100 can be inserted into the storage box 33 from the opening on the side of the storage box 33.
[0034] The litmus paper 32 is placed at the opening, so that the litmus paper 32 is more easily contacted with the water vapor released by the humidifier 2, thereby improving the reaction speed of the litmus paper 32.
[0035] The humidifier 2 comprises a water tank 21, and the top end of the water tank 21 is provided with a slot. The water tank 21 is used for storing water, and the water tank 21 releases water vapor through the slot. When the oven 1 bakes the battery cell 100, the water in the water tank 21 also evaporates quickly, and the water vapor in the water tank 21 can be quickly released from the slot. Preferably, the length of the water tank 21 is 40-50 cm, the width of the water tank 21 is 20-30 cm, and the depth of the water tank 21 is 10-20 cm, so as to avoid that the water tank 21 occupies too much internal space of the oven 1, and to facilitate more battery cells 100 to be placed in the oven 1, thereby indirectly improving the detection efficiency of the battery cells 100.
[0036] The height of the liquid surface in the water tank 21 is 60-80% of the depth of the water tank 21. The humidifier 2 comprises a liquid level sensor installed on the water tank 21, which is used to detect the height of the liquid surface in the water tank 21. When the liquid surface in the water tank 21 is lower than 60% of the depth of the water tank 21, the liquid level sensor sends a signal to the controller, and the controller sends an alarm. The staff or external equipment replenishes water to the water tank 21, or the oven 1 stops baking the battery cell 100, so as to avoid that the environment around the battery cell 100 is too dry to make the litmus paper 32 react with the acidic gas.
[0037] In some embodiments, the humidifier 2 comprises a water filling pipe 22 and a water valve. The water filling pipe 22 is connected to the water tank 21, and the water valve is installed on the water filling pipe 22. The water valve can control the opening and closing of the water filling pipe 22. When the liquid level sensor detects that the liquid surface is lower than 60% of the depth of the water tank 21, the liquid level sensor sends a signal to the controller, and the controller controls the water valve to open. The water filling pipe 22 introduces water from the external equipment to the water tank 21, so as to replenish water to the water tank 21. When the liquid level sensor detects that the liquid surface is higher than 80% of the depth of the water tank 21, the liquid level sensor sends a signal to the controller, and the controller controls the water valve to close. The water filling pipe 22 stops replenishing water from the external equipment to the water tank 21, so as to avoid that the water in the water tank 21 overflows the water tank 21.
[0038] The solutions of the present application have been described in detail above with reference to the accompanying drawings. In the above-described embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. It should also be appreciated by those skilled in the art that the actions and modules involved in the description are not necessarily required by the present application. In addition, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined and reduced in sequence according to actual needs, and the modules in the device embodiments of the present application can be combined, divided and reduced according to actual needs.
[0039] The above has described various embodiments of the present application. The above description is exemplary and is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical applications or improvements to the technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.
Claims
1. An electric cell leakage detection device, characterized by comprising: The oven comprises: an oven; a humidifier, which is located in the oven, and is used to adjust the humidity in the oven; a detection mechanism, which is located in the oven, and comprises a storage site and a litmus paper, the storage site is used to store a battery, and the litmus paper is placed in the storage site.
2. The cell leakage detection apparatus according to claim 1, characterized by: The detection mechanism comprises a plurality of storage boxes, the storage site is located in the storage box, and the storage boxes are arranged in a stacked manner in the oven.
3. The cell leakage detection apparatus of claim 2, wherein: The litmus paper is in one-to-one correspondence with the storage box.
4. The cell leakage detection apparatus of claim 2, wherein: The storage box is provided with an opening, and the opening faces upward.
5. The cell leakage detection apparatus of claim 4, wherein: The litmus paper is placed in the opening.
6. The cell leakage detection apparatus of claim 1, wherein: The humidifier comprises a water tank, the top end of the water tank is provided with a slot, the water tank is used to store water, and the water tank releases water vapor through the slot.
7. The cell leakage detection apparatus of claim 6, wherein: The length of the water tank is 40-50 cm, the width of the water tank is 20-30 cm, and the depth of the water tank is 10-20 cm.
8. The cell leakage detection apparatus of claim 7, wherein: The height of the liquid level in the water tank is 60-80% of the depth of the water tank.
9. The cell leakage detection apparatus of claim 6, wherein: The humidifier comprises a liquid level sensor, which is installed on the water tank and is used to detect the liquid level of the water tank.
10. The cell leakage detection apparatus of claim 6, wherein: The humidifier comprises a water pipe and a water valve, the water pipe is in communication with the water tank, and the water valve is installed on the water pipe.