Device for collecting internal gas during battery formation

Abstract

The invention provides an internal gas collecting device during battery formation, and relates to the technical field of batteries, the internal gas collecting device comprises a base part, a flow guide part and a fixing part, the base part is provided with a flow guide cavity, and the flow guide cavity is used for being communicated with the interior of a battery; the flow guide part is arranged on the base part, is communicated with the flow guide cavity and is used for conveying gas in the battery to the gas collection bottle; the fixing part is connected with the base part and used for fixing the base part to the battery. According to the device for collecting the internal gas during battery formation provided by the embodiment of the invention, the gas in the battery is conveyed to the gas collecting bottle for storage through the flow guide component, and the base component is fixed on the battery through the fixing component, so that the stability of the collecting device is improved, and gas collection is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of batteries, and in particular to a device for collecting internal gas during battery formation. Background Art

[0002] Batteries are one of the most commonly used energy storage technologies, with applications ranging from small portable electronic devices to large electric vehicle battery packs. During the battery manufacturing process, the battery must undergo a formation process, which is the most expensive step in battery manufacturing, except for the cost of raw materials. During the formation process, the electrolyte decomposes on the anode surface, resulting in the formation of a solid electrolyte interface layer. The electrolyte interface layer acts as a protective layer to prevent electrolyte decomposition and solvent embedding into the graphite layer in subsequent cycles. There are several gas evolution mechanisms in the battery, the main source of which is the reduction of the electrolyte in the first cycle, while the electrolyte interface layer is formed on the anode surface. The gas generated during the formation of the electrolyte interface layer is degassed before the battery is sealed. The existing gas collection device lacks a fixing mechanism, which makes the gas collection device unstable after being fixed to the battery, affecting the gas collection effect. Summary of the invention

[0003] The invention provides a device for collecting internal gas during battery formation, which is used to solve the problem that the gas collecting device in the prior art is unstable after being fixed on the battery due to lack of a fixing mechanism.

[0004] The present invention provides a device for collecting internal gas during battery formation, comprising:

[0005] A base component, wherein the base component is provided with a flow guiding cavity, and the flow guiding cavity is used to communicate with the interior of the battery;

[0006] A flow guide component, disposed on the base component and communicated with the flow guide cavity, the flow guide component being used to transport the gas inside the battery to the gas collecting bottle;

[0007] The fixing component is connected to the base component and is used to fix the base component to the battery.

[0008] According to an embodiment of the present invention, a device for collecting internal gas during battery formation is provided, wherein the base component comprises:

[0009] substrate;

[0010] A sealing component is arranged on one side of the substrate, and the sealing component cooperates with the substrate to form the guide cavity.

[0011] According to an embodiment of the present invention, a device for collecting internal gas during battery formation is provided, wherein the sealing component comprises:

[0012] A flexible plug is in the shape of a circular ring, an annular groove is provided on one side of the substrate, and the flexible plug is embedded in the annular groove.

[0013] According to a device for collecting internal gas during battery formation provided by an embodiment of the present invention, the outer diameter of the flexible plug gradually decreases in a direction away from the substrate.

[0014] According to an embodiment of the present invention, a device for collecting internal gas during battery formation is provided, wherein the fixing component comprises:

[0015] Two clamping assemblies are hinged to the two ends of the base plate in a one-to-one correspondence, and the fixing component is suitable for switching between an open state and a clamping state; in the clamping state, the two clamping assemblies are connected to clamp the battery between the two clamping assemblies; in the open state, the two clamping assemblies are separated.

[0016] According to an embodiment of the present invention, a device for collecting internal gas during battery formation is provided, wherein the clamping assembly comprises:

[0017] A connecting rod, a first end of which is hinged to the base plate;

[0018] A clamping block connected to the second end of the connecting rod, wherein the clamping block is provided with a clamping portion;

[0019] The locking piece is hinged to the clamping block. In the clamping state, the two clamping blocks are clamped on the outer peripheral surface of the battery through the clamping portion, and the locking piece of one clamping assembly is connected to the clamping block of another clamping assembly.

[0020] According to an embodiment of the present invention, a device for collecting internal gas during battery formation is provided, wherein the clamping assembly further comprises:

[0021] A connecting block is provided with a strip-shaped through hole extending along the thickness direction of the base plate, the connecting block is connected to the base plate via bolts in the strip-shaped through hole, and the first end of the connecting rod is hinged to the corresponding connecting block.

[0022] According to an embodiment of the present invention, a device for collecting internal gas during battery formation is provided. The outer peripheral surface of the battery is provided with a rolling groove, and the clamping portion is provided with a protrusion. In the clamping state, the protrusion is clamped in the rolling groove.

[0023] According to a device for collecting internal gas during battery formation provided by an embodiment of the present invention, the protrusion includes an arc-shaped ridge, the clamping portion includes an arc-shaped groove, and the arc-shaped ridge is located in the arc-shaped groove.

[0024] According to an embodiment of the present invention, a device for collecting internal gas during battery formation is provided, further comprising:

[0025] A conductive connector is disposed on the base component and is used for contacting the positive electrode of the battery.

[0026] The device for collecting internal gas during battery formation provided in an embodiment of the present invention transports the gas inside the battery to a gas collecting bottle for storage through a guide component, and fixes the base component to the battery through a fixing component, thereby improving the stability of the collecting device and facilitating gas collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of a device for collecting internal gas during battery formation provided by an embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the assembly of a device for collecting internal gas during battery formation provided by an embodiment of the present invention.

[0030] Reference numerals:

[0031] 10. Base component; 11. Diversion cavity; 12. Base plate; 13. Flexible plug; 14. Conductive connector;

[0032] 20. flow guide component; 21. quick connector; 22. connector; 23. exhaust pipe;

[0033] 30. fixing member; 31. connecting rod; 32. clamping block; 33. locking member; 34. clamping part; 35. connecting block; 36. arc-shaped convex ridge;

[0034] 40. Battery; 41. Rolling groove. DETAILED DESCRIPTION

[0035] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0038] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] Combine the following Figure 1-Figure 2 A device for collecting internal gas during battery formation according to an embodiment of the present invention is described.

[0041] like Figure 1 and Figure 2 As shown, the internal gas collection device during battery formation includes a base component 10, a flow guide component 20 and a fixing component 30. The base component 10 is provided with a flow guide cavity 11, and the flow guide cavity 11 is used to communicate with the inside of the battery 40. The flow guide component 20 is provided on the base component 10, and the flow guide component 20 is communicated with the flow guide cavity 11, and the flow guide component 20 is used to transport the gas inside the battery 40 to the gas collection bottle. The fixing component 30 is connected to the base component 10, and the fixing component 30 is used to fix the base component 10 to the battery 40.

[0042] The device for collecting internal gas during battery formation provided in an embodiment of the present invention transports the gas inside the battery 40 to a gas collecting bottle for storage through a guide component 20, and fixes the base component 10 to the battery 40 through a fixing component 30, thereby improving the stability of the collection device and facilitating gas collection.

[0043] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the base component 10 includes a substrate 12 and a sealing component. The substrate 12 is a plate-like structure. The material of the substrate 12 is an insulating material, such as plastic or rubber. The substrate 12 is used to provide an installation base for the guide component 20 and the fixing component 30. In this embodiment, the substrate 12 is a rectangular plate. Of course, the substrate 12 can also be a circular plate, a regular pentagonal plate or a plate of other shapes. The sealing component is arranged on one side of the substrate 12. The sealing component cooperates with the substrate 12 to enclose the guide cavity 11. The sealing component is used to seal with the battery opening to prevent the gas generated by the battery 40 from flowing out through the gap between the substrate 12 and the battery 40.

[0044] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the sealing assembly includes a flexible plug 13. The material of the flexible plug 13 is silicone, rubber or other flexible materials. The flexible plug 13 is in a circular ring shape, and the guide cavity 11 is located in the central area surrounded by the flexible plug 13. An annular groove is provided on one side of the substrate 12, and the flexible plug 13 is embedded in the annular groove. Of course, the installation method of the flexible plug 13 is not limited to this. The flexible plug 13 can also be bonded to the substrate 12 or the flexible plug 13 and the substrate 12 can be integrally formed. Part of the outer diameter of the flexible plug 13 is smaller than the inner diameter of the battery opening. When collecting gas, the flexible plug 13 is inserted into the battery opening, and the flexible plug 13 is sealed with the battery opening.

[0045] It should be noted here that the shape of the flexible plug 13 is not limited to a circular ring, and may also be a rectangular ring or other shapes, which is specifically determined according to the shape of the battery.

[0046] In another embodiment of the present invention, at least part of the inner diameter of the flexible plug 13 is larger than the inner diameter of the battery opening. When collecting gas, the flexible plug 13 is sleeved on the outer periphery of the battery opening, which can also achieve a sealed fit between the flexible plug 13 and the battery opening.

[0047] In another embodiment of the present invention, Figure 1 and Figure 2 As shown, the outer diameter of the flexible plug 13 gradually decreases in the direction away from the substrate 12. The outer diameter of the side of the flexible plug 13 away from the substrate 12 is smaller than the inner diameter of the battery opening, and the outer diameter of the side of the flexible plug 13 close to the substrate 12 is larger than the inner diameter of the battery opening. After the side of the flexible plug 13 away from the substrate 12 is inserted into the battery opening, as the insertion depth of the flexible plug 13 increases, the flexible plug 13 fits more tightly with the battery opening, and the sealing effect is better.

[0048] In one embodiment of the present invention, the fixing component 30 includes two clamping assemblies, which are symmetrically arranged and hinged to the two ends of the substrate 12 one by one. The fixing component 30 is suitable for switching between an open state and a clamping state; in the clamping state, the two clamping assemblies are connected to clamp the battery 40 between the two clamping assemblies; in the open state, the two clamping assemblies are separated.

[0049] It should be noted here that the number of clamping components is not limited to two, and may be one, four or more. When one clamping component is provided, the clamping block 32 is provided in a ring shape.

[0050] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the clamping assembly includes a connecting rod 31, a clamping block 32 and a locking member 33. The connecting rod 31 is used to connect the substrate 12 and the clamping block 32. The length of the connecting rod 31 is greater than the thickness of the substrate 12. The first end of the connecting rod 31 is hinged to the substrate 12 through a first pin shaft, and the clamping block 32 is connected to the second end of the connecting rod 31. Specifically, the clamping block 32 and the second end of the connecting rod 31 can be hinged or fixedly connected. When the clamping block 32 is fixedly connected to the second end of the connecting rod 31, the connecting rod 31 is perpendicular to the clamping block 32. The clamping block 32 and the connecting rod 31 rotate around the first pin shaft to switch the fixing component 30 between the clamped state and the open state.

[0051] The clamping block 32 is provided with a clamping portion 34, and the clamping portion 34 includes an arc-shaped card slot, which is a semicircular card slot, and the curvature of the arc-shaped card slot is adapted to the curvature of the outer peripheral surface of the battery 40. The locking member 33 is hinged to the clamping block 32 through a second pin shaft. In the clamping state, the two clamping blocks 32 are clamped to the outer peripheral surface of the battery 40 through their respective clamping portions 34, and the locking member 33 of one clamping assembly is connected to the clamping block 32 of the other clamping assembly. The clamping assembly is fixed by the locking member 33 to prevent the two clamping assemblies from separating.

[0052] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the locking member 33 includes a fixed screw and a nut. The first end of the clamping block 32 is provided with a mounting groove, and the first end of the fixed screw is hinged to the side wall of the mounting groove through a second pin shaft. The second end of the clamping block 32 is provided with a locking groove, and the second end of the fixed screw is threadedly matched with the nut. In the clamped state, the second end of the fixed screw of one clamping block 32 is clamped in the locking groove of another clamping block 32, and is locked in the locking groove by the nut. When it is necessary to open, just loosen the nut, separate the second end of the fixed screw from the locking groove, and the two clamping blocks 32 can be separated. Preferably, the nut is a stainless steel butterfly nut. During installation, the second end of the fixed screw can be fixed by turning the stainless steel butterfly nut by hand, without the need to use tools such as wrenches, which is more convenient to operate.

[0053] In another embodiment of the present invention, the second end of the clamping block 32 is provided with a through hole, the first end of the fixing screw is provided with a strip-shaped through hole, and the first end of the fixing screw is hinged to the side wall of the mounting groove through the second pin shaft in the strip-shaped through hole. Since the second pin shaft is provided in the strip-shaped through hole, the fixing screw can move a certain distance relative to the second pin shaft, so that the second end of the fixing screw can be inserted into the through hole or pulled out from the through hole. In the clamped state, the second end of the fixing screw is inserted into the through hole at the second end of the clamping block 32 and is locked in the through hole by a nut. When it is necessary to open, just loosen the nut, separate the second end of the fixing screw from the through hole, and the two clamping blocks 32 can be separated.

[0054] In another embodiment of the present invention, the locking member 33 includes a buckle and a buckle tongue, the first end of the fixing screw is hinged to the buckle through a second pin, and the buckle tongue is arranged at the second end of the clamping block 32. In the clamping state, the buckle on one clamping block 32 is buckled with the buckle tongue of another clamping block 32, thereby realizing the connection between the two clamping blocks 32.

[0055] In one embodiment of the present invention, Figure 2As shown, the clamping assembly also includes a connecting block 35, two connecting blocks 35 are provided, and the two connecting blocks 35 are arranged at both ends of the substrate 12 in a one-to-one correspondence. The connecting block 35 is provided with a strip through hole extending along the thickness direction of the substrate 12, that is, the strip through hole extends along the up and down direction. The connecting block 35 is connected to the substrate 12 through bolts in the strip through hole, and the first end of the connecting rod 31 is hinged to the corresponding connecting block 35 through a first pin shaft.

[0056] Since the strip-shaped through hole extends in the up-down direction, the height of the connection block 35 can be adjusted by bolts during use. When the height of the connection block 35 needs to be adjusted, it is only necessary to loosen the bolts in the strip-shaped through hole, adjust the connection block 35 to a suitable height, and then tighten the bolts to ensure that the protrusion can be accurately stuck in the rolling groove 41 during installation.

[0057] In one embodiment of the present invention, the clamping assembly includes a fixing ring (not shown) and a plurality of screws (not shown). The fixing ring is a circular ring body. Of course, the fixing ring can also be a rectangular ring body, a regular polygonal ring body or a ring body of other shapes. The shape of the fixing ring is specifically determined according to the shape of the battery 40. The fixing ring is used to be sleeved on the outer periphery of the battery 40. A plurality of threaded through holes are arranged at intervals on the fixing ring. The plurality of screws are threadedly matched with the plurality of threaded through holes in a one-to-one correspondence. When the fixing component 30 is in a clamped state, the fixing ring is sleeved on the outer periphery of the battery 40, and the screws are tightened so that the screws are stuck in the rolling groove 41 of the battery 40. When the fixing component 30 is opened, the screws are loosened to separate the fixing ring from the battery 40.

[0058] In one embodiment of the present invention, the outer circumferential surface of the battery 40 is provided with a rolling groove 41, which can be an annular groove extending along the circumference of the battery 40, or an arc groove extending along the circumference of the battery 40. When the rolling groove 41 is an arc groove, the arc groove needs to be provided with at least two sections to cooperate with the corresponding clamping assembly. The clamping portion 34 is provided with a protrusion, and in the clamping state, the protrusion is clamped in the rolling groove 41. By clamping the protrusion into the rolling groove 41, the fixing component 30 can be fixed to prevent the base component 10 from moving along the axial direction of the battery 40 due to the internal gas pressure of the battery 40.

[0059] In one embodiment of the present invention, the protrusion includes an arcuate convex rib 36, which is located in the arcuate slot, and the length of the arcuate convex rib 36 is the same as the length of the arcuate slot. The arcuate convex rib 36 can be located in the middle of the arcuate slot or at the edge of the arcuate slot.

[0060] In one embodiment of the present invention, the internal gas collection device during battery formation further includes a conductive connector 14, which is disposed on the base component 10. Specifically, the conductive connector 14 is a metal rod, and the conductive connector 14 penetrates the substrate 12. In order to improve the sealing performance, the conductive connector 14 and the substrate 12 are sealed by a sealant or a sealing ring. The conductive connector 14 is used to contact the positive electrode of the battery 40 to lead out the positive electrode of the battery 40. The end of the conductive connector 14 away from the battery 40 is connected to the positive electrode of the formation device, and the negative electrode of the battery 40 is connected to the negative electrode of the formation device after the injection.

[0061] In one embodiment of the present invention, the flow guide component 20 includes a connector 22 , which is disposed on the substrate 12 , and a first end of the connector 22 is connected to the flow guide cavity 11 . In this embodiment, the connector 22 is an elbow connector.

[0062] Furthermore, the flow guide component 20 also includes a quick connector 21, which is connected to the second end of the connector 22 and the exhaust pipe 23. The quick connector 21 can be provided to facilitate the connection between the connector 22 and the exhaust pipe 23.

[0063] Combine the following Figure 1 to Figure 2 Describe a specific embodiment of the invention, such as Figure 1 to Figure 2 As shown, the device for collecting internal gas during battery formation includes a base component 10, a guide component 20, a fixing component 30 and a conductive connector 14. The base component 10 includes a substrate 12 and a sealing component. The substrate 12 is a plate-like structure. The substrate 12 is a non-conductor. The substrate 12 is used to provide an installation basis for the guide component 20 and the fixing component 30. In this embodiment, the substrate 12 is a rectangular plate body. The length of the substrate 12 is greater than the outer diameter of the battery 40 to ensure that both ends of the substrate 12 protrude relative to the battery 40, providing activity space for the two clamping components.

[0064] The sealing component is arranged on one side of the substrate 12, and the sealing component cooperates with the substrate 12 to enclose the flow guide cavity 11, and the sealing component is used to seal with the battery opening. The sealing component includes a flexible plug 13, and the material of the flexible plug 13 is rubber. The flexible plug 13 is annular, and the flow guide cavity 11 is located in the central area surrounded by the flexible plug 13. An annular groove is arranged on one side of the substrate 12, and the flexible plug 13 is embedded in the annular groove. The outer diameter of the flexible plug 13 gradually decreases in the direction away from the substrate 12. Specifically, the outer diameter of the side of the flexible plug 13 away from the substrate 12 is smaller than the inner diameter of the battery opening, and the outer diameter of the side of the flexible plug 13 close to the substrate 12 is larger than the inner diameter of the battery opening.

[0065] The outer circumferential surface of the battery 40 is provided with a rolling groove 41 , which is an annular groove extending along the circumference of the battery 40 . The cross section of the rolling groove 41 is V-shaped to ensure that as long as the arc-shaped convex ridge 36 is stuck on the edge of the rolling groove 41 , it can automatically slide into the rolling groove 41 .

[0066] The fixing component 30 includes two clamping assemblies, which are symmetrically arranged and hinged to the two ends of the substrate 12 one by one. The fixing component 30 is suitable for switching between an open state and a clamping state. In the clamping state, the two clamping assemblies are connected to clamp the battery 40 between the two clamping assemblies. In the open state, the two clamping assemblies are separated.

[0067] The clamping assembly includes a connecting rod 31, a connecting block 35, a clamping block 32 and a locking member 33. The two connecting blocks 35 are arranged at both ends of the substrate 12 in a one-to-one correspondence. The connecting block 35 is provided with a strip-shaped through hole extending in the thickness direction of the substrate 12. There are two strip-shaped through holes, which are arranged at intervals along the width direction of the substrate 12. A bolt is arranged in each strip-shaped through hole to fix the connecting block 35 to the end of the substrate 12. The material of the connecting block 35 can be the same as that of the substrate 12 or different. Two connecting parts are provided on the side of the connecting block 35 away from the substrate 12. The two connecting parts are arranged at intervals. The first end of the connecting rod 31 can be movably inserted between the two connecting parts, and the first end of the connecting rod 31 is hinged to the two connecting parts through a first pin shaft.

[0068] The length of the connecting rod 31 is greater than the thickness of the substrate 12. A second connecting portion is provided on one side of the clamping block 32. The second end of the connecting rod 31 is fixedly connected to the second connecting portion of the corresponding clamping block 32. The connecting rod 31 is perpendicular to the clamping block 32. A clamping portion 34 is provided on the other side of the clamping block 32. The clamping portion 34 includes an arc-shaped card slot, which is a semicircular card slot. The curvature of the arc-shaped card slot matches the curvature of the outer peripheral surface of the battery 40. The clamping portion 34 is provided with a protrusion. In the clamped state, the protrusion is clamped in the rolling groove 41. The protrusion includes an arc-shaped convex rib 36. The arc-shaped convex rib 36 is located in the arc-shaped card slot. The length of the arc-shaped convex rib 36 is the same as the length of the arc-shaped card slot. The arc-shaped convex rib 36 is located at the edge of the arc-shaped card slot.

[0069] The locking member 33 includes a fixing screw and a stainless steel butterfly nut. The first end of the clamping block 32 is provided with a mounting groove, and the first end of the fixing screw is hinged to the side wall of the mounting groove through a second pin. The second end of the clamping block 32 is provided with a locking groove, and the second end of the fixing screw is threadedly matched with the stainless steel butterfly nut. In the clamped state, the second end of the fixing screw is clamped in the locking groove of another clamping block 32 and locked in the locking groove through the stainless steel butterfly nut. When it is necessary to open, just loosen the stainless steel butterfly nut, separate the second end of the fixing screw from the locking groove, and the two clamping blocks 32 can be separated.

[0070] The conductive connector 14 is disposed on the base component 10 . Specifically, the conductive connector 14 is a metal rod. The conductive connector 14 passes through the substrate 12 . The conductive connector 14 and the substrate 12 are sealed by a sealant or a sealing ring.

[0071] The flow guide component 20 includes a connector 22 and a quick connector 21. The connector 22 is disposed on the substrate 12. The first end of the connector 22 is connected to the flow guide cavity 11. In this embodiment, the connector 22 is an elbow connector. The quick connector 21 is connected to the second end of the connector 22 and the exhaust pipe 23.

[0072] Specific operating steps of the internal gas collection device during battery formation:

[0073] 1. Place the substrate 12 on the upper part of the battery 40, align the flexible plug 13 with the battery opening, and press the substrate 12 hard to insert the flexible plug 13 into the battery opening, so that the flexible plug 13 and the battery opening are sealed;

[0074] 2. Rotate the two clamping blocks 32 so that the protrusions are inserted into the rolling grooves 41;

[0075] 3. If the height of the clamping block 32 is not appropriate, resulting in the protrusion being unable to fit into the rolling groove 41, loosen the bolts at both ends of the base plate 12 and adjust the height of the connecting block 35 to ensure that the protrusion can fit into the rolling groove 41;

[0076] 4. Rotate the fixing screw so that the second end of the fixing screw is inserted into the locking groove of another clamping block 32, and tighten the stainless steel butterfly nut so that the second end of the fixing screw is locked in the locking groove through the stainless steel butterfly nut;

[0077] 5. Use the conductive connector 14 to contact the positive electrode of the battery 40 to lead out the positive electrode of the battery 40; the end of the conductive connector 14 away from the battery 40 is connected to the positive electrode of the formation device, and the negative electrode of the battery 40 is connected to the negative electrode of the formation device after the liquid is injected;

[0078] 6. Connect the quick connector 21 to the exhaust pipe 23, and use the flow guide component 20 and the exhaust pipe 23 to transport the gas generated inside the battery 40 after liquid injection to the gas collecting bottle.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for collecting internal gas during battery formation, characterized in that: include: A base component, wherein the base component is provided with a flow guiding cavity, and the flow guiding cavity is used to communicate with the interior of the battery; A flow guide component, disposed on the base component and communicated with the flow guide cavity, the flow guide component being used to transport the gas inside the battery to the gas collecting bottle; The fixing component is connected to the base component and is used to fix the base component to the battery.

2. The device for collecting internal gas during battery formation according to claim 1, characterized in that: The base component comprises: substrate; A sealing component is arranged on one side of the substrate, and the sealing component cooperates with the substrate to form the guide cavity.

3. The device for collecting internal gas during battery formation according to claim 2, characterized in that: The sealing assembly comprises: A flexible plug is in the shape of a circular ring, an annular groove is provided on one side of the substrate, and the flexible plug is embedded in the annular groove.

4. The device for collecting internal gas during battery formation according to claim 3, characterized in that: The outer diameter of the flexible plug gradually decreases in a direction away from the substrate.

5. The device for collecting internal gas during battery formation according to any one of claims 2 to 4, characterized in that: The fixing member comprises: Two clamping assemblies, the two clamping assemblies are hinged to the two ends of the base plate in a one-to-one correspondence, and the fixing component is suitable for switching between an open state and a clamping state; in the clamping state, the two clamping assemblies are connected to clamp the battery between the two clamping assemblies; in the open state, the two clamping assemblies are separated.

6. The device for collecting internal gas during battery formation according to claim 5, characterized in that: The clamping assembly comprises: A connecting rod, a first end of which is hinged to the base plate; A clamping block connected to the second end of the connecting rod, wherein the clamping block is provided with a clamping portion; The locking piece is hinged to the clamping block. In the clamping state, the two clamping blocks are clamped on the outer peripheral surface of the battery through the clamping portion, and the locking piece of one clamping assembly is connected to the clamping block of another clamping assembly.

7. The device for collecting internal gas during battery formation according to claim 6, characterized in that: The clamping assembly further comprises: A connecting block is provided with a strip-shaped through hole extending along the thickness direction of the base plate, the connecting block is connected to the base plate via bolts in the strip-shaped through hole, and the first end of the connecting rod is hinged to the corresponding connecting block.

8. The device for collecting internal gas during battery formation according to claim 6, characterized in that: The outer peripheral surface of the battery is provided with a rolling groove, and the clamping portion is provided with a protrusion. In the clamping state, the protrusion is clamped in the rolling groove.

9. The device for collecting internal gas during battery formation according to claim 8, characterized in that: The protrusion includes an arc-shaped convex ridge, the clamping portion includes an arc-shaped clamping groove, and the arc-shaped convex ridge is located in the arc-shaped clamping groove.

10. The device for collecting internal gas during battery formation according to any one of claims 1 to 4, characterized in that: Also includes: A conductive connector is disposed on the base component and is used for contacting the positive electrode of the battery.

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