Battery gas collecting device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery gas collecting device. The battery gas collecting device comprises a collecting pipe, a push rod assembly and a baffle, an opening penetrates through the top of the collecting pipe, and a through hole and a gas hole penetrate through the bottom of the collecting pipe. One end of the push rod assembly is sealed through the opening and movably penetrates into the collecting pipe. One end of the baffle is sealed, movably penetrates through the through hole and extends into the collecting pipe, and the baffle is provided with a detection position for blocking the air hole and a collecting position for opening the air hole. When the baffle is located at the collecting position, the collecting pipe is communicated with the battery through the air hole. The push rod assembly is pulled to slide outwards in the axial direction of the collecting pipe so that the battery gas can be sucked into the collecting pipe, and after collection is completed, the baffle moves to the detection position. The battery gas is rapidly collected by pulling the push rod assembly, and meanwhile, the gas hole is closed through the baffle, so that the sealing performance of the collecting pipe is ensured, the structure of the battery gas collecting device is simplified, and the collecting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery gas collection device. Background Art

[0002] During the first charge of a lithium battery, a solid electrolyte interface film will form on the negative electrode surface. This process is called the formation stage. During the formation stage, a certain amount of gas is usually produced inside the battery. The accumulation of gas will cause problems such as battery volume expansion and impedance increase, leading to electrical performance degradation.

[0003] In order to detect and analyze the composition of battery gas in the formation stage, the existing battery gas collection device connects the inside of the battery with the air bag through a pipeline, and the vacuum mechanism draws the air bag into a negative pressure state so that the gas inside the battery enters the air bag. The existing battery gas collection device needs to use a vacuum mechanism and an air bag, which increases the structural complexity of the battery gas collection device, makes the gas collection operation more cumbersome, and reduces the battery gas collection efficiency. Utility Model Content

[0004] The utility model aims to provide a battery gas collection device to simplify the structure of the battery gas collection device and improve the battery gas collection efficiency.

[0005] To achieve this purpose, the technical solution adopted by the utility model is:

[0006] Battery gas collection device, including

[0007] A collecting tube, wherein the top of the collecting tube is provided with an opening, and the bottom of the collecting tube is provided with a through hole and an air hole;

[0008] A push rod assembly, one end of which is sealed through the opening and movably penetrates the collecting tube;

[0009] A baffle, one end of which is sealed and moves through the through hole and extends into the collecting tube, and the baffle has a detection position for blocking the pores and a collection position for opening the pores.

[0010] As a preferred embodiment, the battery gas collection device also includes a locking rod, and a limiting hole is also provided through the bottom of the collection tube. One end of the locking rod is sealed and moves through the limiting hole and extends into the collection tube to tighten or loosen the baffle.

[0011] As a preferred embodiment, the baffle is provided with a first hole and a second hole along the moving direction. When the baffle is located at the detection position, the first hole is coaxially connected with the limiting hole, and the locking rod is sealed and penetrated in the limiting hole and the first hole in sequence; when the baffle is located at the collection position, the second hole is coaxially connected with the limiting hole, and the locking rod is sealed and penetrated in the limiting hole and the second hole in sequence.

[0012] As a preferred solution, one end of the first hole and the second hole in the axial direction both penetrates the bottom surface of the baffle, and the other end of the first hole and the second hole in the axial direction are both closed.

[0013] As a preferred solution, the baffle includes a pressing plate and a handle, one end of the pressing plate is connected to the handle, and the other end of the pressing plate is sealed and moves through the through hole and extends into the collecting tube to block or open the pores.

[0014] As a preferred embodiment, the inner bottom wall of the collecting tube is provided with a slide groove, the through hole is connected with the side wall of the slide groove, and the air hole is located on the bottom wall of the slide groove; the pressure plate extends into the collecting tube and is slidably arranged in the slide groove.

[0015] As a preferred solution, the battery gas collection device further comprises a release pipe, one end of which is connected to the bottom of the collection pipe, and the other end of which has an openable and closable gas outlet.

[0016] As a preferred solution, a switch valve is provided on the release pipe, and the switch valve can open or close the air outlet.

[0017] As a preferred solution, a flow meter is provided on the release pipe.

[0018] As a preferred solution, the battery gas collection device further comprises a needle, and the needle is detachably connected and installed in the air hole.

[0019] The beneficial effects of the utility model are:

[0020] The battery gas collection device proposed by the utility model includes a collection tube, a push rod assembly and a baffle. When the baffle is located at the collection position, the collection tube is connected to the inside of the battery through the opened pores. The push rod assembly is pulled outward along the axial direction of the collection tube to slide so as to suck the battery gas inside the battery into the collection tube. When the battery gas collection process is completed, the baffle is moved to the detection position of blocking the pores so as to transfer the battery gas in a closed form. By pulling the push rod assembly, the inside of the collection tube is made into a negative pressure environment so as to quickly collect the battery gas. At the same time, the pores are closed by the baffle to ensure the sealing performance of the collection tube and avoid leakage or contamination of the battery gas. This not only simplifies the structure of the battery gas collection device, but also improves the battery gas collection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a battery gas collection device provided by an embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the structural decomposition of the battery gas collection device provided in an embodiment of the utility model.

[0023] The names and numbers of the components in the figure are as follows:

[0024] 1. Collecting tube; 10. Opening; 11. Through hole; 12. Limiting hole; 13. Air hole; 14. Ear plate; 2. Push rod assembly; 21. Rod body; 22. Piston; 3. Baffle; 31. Pressing plate; 311. First hole; 312. Second hole; 32. Handle; 4. Locking rod; 5. Release tube; 6. Switch valve; 7. Needle. DETAILED DESCRIPTION

[0025] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0029] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0030] The existing battery gas collection device connects the inside of the battery with the air bag through a pipeline, and the vacuum mechanism draws the air bag into a negative pressure state so that the gas inside the battery enters the air bag. The existing battery gas collection device requires the use of a vacuum mechanism and an air bag, which increases the structural complexity of the battery gas collection device, makes the gas collection operation more cumbersome, and reduces the battery gas collection efficiency.

[0031] To solve the above problems, Figure 1 and Figure 2 As shown, this embodiment proposes a battery gas collection device, which can be used for gas collection in the battery formation stage. Of course, the battery gas collection device can also be used in other processes that require gas collection. Specifically, the battery gas collection device includes a collection tube 1, a push rod assembly 2 and a baffle 3. The top of the collection tube 1 is penetrated with an opening 10, and the bottom of the collection tube 1 is penetrated with a through hole 11 and an air hole 13. One end of the push rod assembly 2 is sealed through the opening 10 and is movably penetrated in the collection tube 1. One end of the baffle 3 is sealed and movably passes through the through hole 11 and extends into the collection tube 1. The baffle 3 has a detection position for blocking the air hole 13 and a collection position for opening the air hole 13. When the baffle 3 is in the collection position, the collection tube 1 is connected to the inside of the battery through the opened air hole 13. The push rod assembly 2 is pulled outward along the axial direction of the collection tube 1 (ab direction in the figure) to slide the battery gas inside the battery into the collection tube 1. After the battery gas collection process is completed, the baffle 3 can be moved to the detection position of the air hole 13 to transfer the battery gas in a closed form. By pulling the push rod assembly 2, the inside of the collection tube 1 is in a negative pressure environment to quickly collect the battery gas. At the same time, the air hole 13 is closed by the baffle 3 to ensure the sealing performance of the collection tube 1 and avoid leakage or contamination of the battery gas, which not only simplifies the structure of the battery gas collection device, but also improves the collection efficiency of the battery gas.

[0032] Furthermore, the battery gas collection device further comprises a needle 7, which is detachably connected and installed in the pore 13. By installing the needle 7 at the bottom of the collection tube 1, the needle 7 is inserted into the weak area of ​​the edge of the battery cap, so that the collection tube 1 is smoothly connected with the inside of the battery through the needle 7, which is easy to operate, reduces the difficulty of collecting battery gas, and improves the collection efficiency. Figure 2 As shown, an input tube is protruding outward from the bottom end of the collecting tube 1, and an air hole 13 is axially penetrated through the input tube. The large end of the needle 7 is sleeved on the input tube.

[0033] In this embodiment, the collection tube 1 can be a syringe barrel, and the push rod assembly 2 includes a rod body 21 and a piston 22. The piston 22 is detachably mounted on one end of the rod body 21. The piston 22 extends into the collection tube 1 through the opening 10 at the top of the collection tube 1, and the piston 22 slides in a sealed manner on the inner wall of the collection tube 1 along the ab direction in the figure. Two symmetrical ear plates 14 are horizontally extended outward from the top of the collection tube 1. When the rod body 21 is manually pushed and pulled, the two fingers of the operator are pressed on the lower surface of the two ear plates 14 respectively, and the other finger of the operator is pressed on the top of the rod body 21. When the rod body 21 is pulled from b to a toward the outside of the collection tube 1, the collection tube 1 is in a negative pressure environment, and the battery gas is sucked into the collection tube 1 through the needle 7. When the rod body 21 is pushed from a to b toward the inside of the collection tube 1, the battery gas in the collection tube 1 is released to the outside of the collection tube 1 under the pressure of the piston 22. The above-mentioned collection tube 1, the push rod assembly 2 and the needle 7 are basically the same as the structure of the existing medical syringe.

[0034] like Figure 1 and Figure 2 As shown, the side wall at the bottom of the collecting tube 1 is penetrated with a through hole 11, and the through hole 11 is connected to the inside of the collecting tube 1. The baffle 3 includes a pressing plate 31 and a handle 32, one end of the pressing plate 31 is connected to the handle 32, and the other end of the pressing plate 31 is sealed and movable through the through hole 11 and extends into the collecting tube 1 to block or open the pores 13. By providing the handle 32, it is convenient to manually pull or push the baffle 3 so that the baffle 3 can be quickly switched between the detection position and the collection position. Specifically, when the pressing plate 31 is manually pulled toward the outside of the collecting tube 1 along the cd direction, the baffle 3 is pulled from the detection position to the collection position; when the pressing plate 31 is manually pushed toward the inside of the collecting tube 1 along the cd direction, the baffle 3 is pushed from the collection position to the detection position.

[0035] Furthermore, a slide groove (not shown) is provided on the inner bottom wall of the collection tube 1, the through hole 11 is connected to the side wall of the slide groove, and the air hole 13 is located on the bottom wall of the slide groove. The pressing plate 31 extends into the collection tube 1 and is slidably arranged in the slide groove. Through the sliding cooperation between the pressing plate 31 and the slide groove, the slide groove has a guiding effect on the pressing plate 31, thereby improving the stability of the pressing plate 31 in reciprocating movement between the detection position and the collection position.

[0036] like Figure 2 As shown, the battery gas collection device also includes a locking rod 4. The bottom of the collection tube 1 is also penetrated by a limiting hole 12. One end of the locking rod 4 is sealed and moves through the limiting hole 12 and extends into the collection tube 1 to tighten or loosen the baffle 3. When the baffle 3 is in the collection position, the locking rod 4 presses against the baffle 3 to lock the position of the baffle 3 in the collection tube 1 to prevent the baffle 3 from shifting and blocking the air hole 13. When the battery gas is collected, the locking rod 4 releases the baffle 3 and can move the baffle 3 from the collection position to the detection position. Finally, the locking rod 4 presses against and locks the baffle 3 again to make the baffle 3 completely block the air hole 13 to prevent the battery gas in the collection tube 1 from leaking or being contaminated.

[0037] The locking rod 4 of this embodiment is a rubber plug, which is not only low in cost and can be used repeatedly, but also has good elastic deformation to ensure good sealing between the rubber plug and the limiting hole 12. By inserting or pulling the rubber plug into or out of the limiting hole 12, the position of the baffle 3 can be quickly locked or unlocked, which is easy to operate and improves the collection efficiency of battery gas.

[0038] like Figure 2 As shown, the baffle 3 is provided with a first hole 311 and a second hole 312 at intervals along the moving direction (ab direction in the figure). When the baffle 3 is located at the detection position, the first hole 311 is coaxially connected with the limiting hole 12, and the locking rod 4 is sequentially sealed and penetrated in the limiting hole 12 and the first hole 311. When the baffle 3 is located at the collection position, the second hole 312 is coaxially connected with the limiting hole 12, and the locking rod 4 is sequentially sealed and penetrated in the limiting hole 12 and the second hole 312. Through the reciprocating movement of the baffle 3 along the ab direction, one of the first hole 311 and the second hole 312 is directly opposite to and connected with the limiting hole 12, so that the baffle 3 can be accurately moved to the detection position or the collection position, thereby improving the displacement accuracy of the baffle 3.

[0039] It should be noted that one end of the first hole 311 and the second hole 312 in the axial direction both penetrate the bottom surface of the baffle 3, and the other ends of the first hole 311 and the second hole 312 in the axial direction are both closed. Since the first hole 311 and the second hole 312 are both blind holes, the battery gas in the collection tube 1 (especially when releasing the battery gas outward) will not squeeze the locking rod 4, thereby preventing the locking rod 4 from being squeezed out of the limiting hole 12 and causing battery gas leakage. At the same time, under the pressure of the battery gas, the baffle 3 will fit tightly in the limiting groove, further improving the sealing effect of the collection tube 1.

[0040] like Figure 1 and Figure 2As shown, the battery gas collection device further includes a release pipe 5, one end of which is connected to the bottom of the collection pipe 1, and the other end of the release pipe 5 has an openable and closable gas outlet. After the battery gas is collected, the end of the release pipe 5 with the gas outlet is connected to the detection mechanism to transfer the battery gas to the detection mechanism, which is convenient for processing and analyzing the battery gas and improves the convenience of battery gas transfer.

[0041] Specifically, an output pipe is protruding outward from the side wall at the bottom of the collecting tube 1, and a connecting hole 11 is provided through the output pipe. One end of the release pipe 5 is sealed and sleeved on the output pipe, so that the interior of the collecting tube 1 is connected with the release pipe 5 through the connecting hole 11. A switch valve 6 is provided on the release pipe 5, and the switch valve 6 can open or close the gas outlet. When releasing the battery gas in the collecting tube 1, it is only necessary to open the switch valve 6, which is easy to operate.

[0042] Furthermore, a flow meter is provided on the release tube 5, and the release amount of the battery gas each time can be accurately recorded by the flow meter, so as to accurately control the transfer of a certain amount of battery gas to different detection mechanisms.

[0043] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A battery gas collection device, characterized in that: include A collecting pipe (1), wherein the top of the collecting pipe (1) is provided with an opening (10), and the bottom of the collecting pipe (1) is provided with a through hole (11) and an air hole (13); A push rod assembly (2), one end of which is sealed through the opening (10) and movably penetrates the collecting pipe (1); A baffle (3), one end of which is sealed and moves through the through hole (11) and extends into the collecting tube (1), and the baffle (3) has a detection position for blocking the air hole (13) and a collection position for opening the air hole (13).

2. The battery gas collection device according to claim 1, characterized in that: The battery gas collection device also includes a locking rod (4), and a limiting hole (12) is also provided through the bottom of the collection tube (1). One end of the locking rod (4) is sealed and movably passes through the limiting hole (12) and extends into the collection tube (1) to tighten or loosen the baffle (3).

3. The battery gas collection device according to claim 2, characterized in that: The baffle plate (3) is provided with a first hole (311) and a second hole (312) at intervals along the moving direction; when the baffle plate (3) is located at the detection position, the first hole (311) is coaxially connected to the limiting hole (12), and the locking rod (4) is sealed and penetrated in the limiting hole (12) and the first hole (311) in sequence; when the baffle plate (3) is located at the collection position, the second hole (312) is coaxially connected to the limiting hole (12), and the locking rod (4) is sealed and penetrated in the limiting hole (12) and the second hole (312) in sequence.

4. The battery gas collection device according to claim 3, characterized in that: One end of the first hole (311) and the second hole (312) along the axial direction both penetrates the bottom surface of the baffle (3), and the other end of the first hole (311) and the second hole (312) along the axial direction are both closed.

5. The battery gas collection device according to claim 1, characterized in that: The baffle (3) comprises a pressing plate (31) and a handle (32); one end of the pressing plate (31) is connected to the handle (32); the other end of the pressing plate (31) is sealed and movably passes through the through hole (11) and extends into the collecting pipe (1) to block or open the air hole (13).

6. The battery gas collection device according to claim 5, characterized in that: The inner bottom wall of the collecting tube (1) is provided with a slide groove, the through hole (11) is connected to the side wall of the slide groove, and the air hole (13) is located on the bottom wall of the slide groove; the pressing plate (31) extends into the collecting tube (1) and is slidably arranged in the slide groove.

7. The battery gas collection device according to claim 1, characterized in that: The battery gas collection device further comprises a release pipe (5), one end of which is connected to the bottom of the collection pipe (1), and the other end of which is provided with an openable and closable gas outlet.

8. The battery gas collection device according to claim 7, characterized in that: The release pipe (5) is provided with a switch valve (6), and the switch valve (6) can open or close the gas outlet.

9. The battery gas collection device according to claim 7, characterized in that: The release pipe (5) is provided with a flow meter.

10. The battery gas collection device according to any one of claims 1 to 9, characterized in that: The battery gas collection device further comprises a needle (7), and the needle (7) is detachably connected and mounted to the air hole (13).

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