Bearing piece

Abstract

The embodiment of the utility model provides a bearing piece, which comprises a clamping part, a supporting part and a supporting part, and is characterized in that the clamping part is used for clamping the surface of a top cover at a battery liquid injection port; the liquid injection groove is formed in one side of the clamping part, and the liquid injection groove is used for being nested with a liquid injection nozzle during liquid injection of the battery or a negative pressure suction nozzle during formation; the inserting part is arranged on the side, away from the liquid injection groove, of the clamping part and protrudes out of the clamping part, the inserting part is used for being inserted into a liquid injection hole in the liquid injection opening, and a first through hole communicated with the liquid injection groove is formed in the inserting part in a penetrating mode. During liquid injection and formation, the bearing piece is assembled at the liquid injection opening of the battery, so that the liquid injection opening or the negative pressure suction nozzle is prevented from being in direct contact with the top cover in the liquid injection or formation process, the effect that no electrolyte or crystal residues of the electrolyte are left at the liquid injection opening and the top cover area near the liquid injection opening can be achieved, and the quality of the battery is effectively improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery manufacturing, in particular to a supporting piece. BACKGROUND

[0002] At present, with the increasing energy shortage and the increasing environmental protection requirements, lithium ion batteries are applied more and more widely due to their excellent characteristics.

[0003] The manufacturing of secondary batteries such as lithium ion batteries generally needs to go through processes such as liquid injection, formation, sealing nail welding and the like, wherein the liquid injection and formation processes are prone to cause electrolyte and crystallization residues at the liquid injection port and the surrounding, which seriously affect the subsequent processing quality, appearance quality and even safety performance, such as pollution, corrosion, resulting in pores and burst points in the sealing nail welding. CONTENT OF THE UTILITY MODEL

[0004] The application aims to solve the problem that the existing secondary batteries are prone to cause electrolyte and crystallization residues at the liquid injection port and the surrounding during liquid injection and formation, thereby affecting the battery quality.

[0005] In order to solve the above problems, the application is realized by the following technical scheme:

[0006] The application provides a supporting piece, which comprises:

[0007] A clamping portion for clamping the surface of the top cover at the liquid injection port of the battery;

[0008] A liquid injection groove arranged on one side of the clamping portion, the liquid injection groove being used for being nested with the liquid injection nozzle during liquid injection or the negative pressure suction nozzle during formation;

[0009] A plug-in portion arranged on the side of the clamping portion away from the liquid injection groove and protruding from the clamping portion, the plug-in portion being used for being plugged into the liquid injection hole in the liquid injection port, and a first through hole being arranged in the plug-in portion and being in communication with the liquid injection groove.

[0010] Further, in the supporting piece, the clamping portion comprises a boss and a first platform extending from inside to outside, the boss being used for sinking into the liquid injection port, the first platform being used for clamping the surface of the top cover at the liquid injection port of the battery, a second through hole being arranged in the boss and being in communication with the liquid injection groove and the first through hole.

[0011] Further, in the supporting piece, the second through hole is in communication with the first through hole in alignment.

[0012] Further, in the supporting piece, the first through hole penetrates the plug-in portion in a direction perpendicular to the first platform.

[0013] Further, in the supporting member, the first platform is perpendicular to the boss.

[0014] Further, in the supporting member, the insertion part comprises a second platform arranged at the bottom of the boss, and a protrusion arranged at the side of the second platform away from the boss, and the first through hole penetrates the second platform and the protrusion.

[0015] Further, in the supporting member, the side surface of the boss is matched with the liquid injection port.

[0016] and / or the protrusion is matched with the liquid injection hole.

[0017] Further, in the supporting member, the second platform is assembled at the bottom of the boss through interference of a cylinder and a hole.

[0018] Further, in the supporting member, the surface of the boss towards the second platform has a multi-layer annular structure or a stripe structure; and / or

[0019] The material of the clamping part is aluminum alloy, stainless steel, Teflon, polypropylene, polyvinylidene fluoride or ethylene-propylene-diene rubber; and / or

[0020] The material of the insertion part is ethylene-propylene-diene rubber.

[0021] The application further provides a battery cleaning method using the supporting member, which comprises the following steps.

[0022] Before liquid injection of the battery, the supporting member is arranged at the liquid injection port of the battery, and the insertion part is inserted into the liquid injection hole in the liquid injection port.

[0023] After the insertion part is inserted into the liquid injection hole in the liquid injection port, a liquid injection nozzle is nested in the liquid injection groove for liquid injection.

[0024] After liquid injection of the battery, a negative pressure suction nozzle is nested in the liquid injection groove for formation; or after formation and re-liquid injection, the supporting member is taken out of the liquid injection port.

[0025] After formation, the supporting member is taken out of the liquid injection port.

[0026] Compared with the prior art, the application has the following advantages.

[0027] In the embodiment of the present application, the supporting member comprises a clamping portion for clamping the surface of the top cover at the liquid injection port of the battery, a liquid injection groove arranged at one side of the clamping portion, the liquid injection groove being used for being nested with the liquid injection nozzle during liquid injection or the negative pressure suction nozzle during formation, and a plug-in portion arranged at the side of the clamping portion away from the liquid injection groove and protruding from the clamping portion, the plug-in portion being used for being plugged into the liquid injection hole in the liquid injection port, and a first through hole in communication with the liquid injection groove being arranged through the plug-in portion.

[0028] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is one of the cross-sectional views of the supporting member provided in the embodiment of the present application;

[0030] Figure 2 is one of the top views of the supporting member provided in the embodiment of the present application;

[0031] Figure 3 is the second cross-sectional view of the supporting member provided in the embodiment of the present application;

[0032] Figure 4 is the second top view of the supporting member provided in the embodiment of the present application;

[0033] Figure 5 is the cross-sectional view of the top cover in the embodiment of the present application;

[0034] Figure 6 is the top view of the top cover in the embodiment of the present application;

[0035] Figure 7 is the combined schematic view of the supporting member and the top cover in the embodiment of the present application;

[0036] Figure 8 is the flowchart of the battery cleaning method provided in the embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0038] Currently, the manufacturing of secondary batteries such as lithium ion batteries generally needs to go through processes including liquid injection, formation, sealing nail welding and the like. Among them, the liquid injection and formation processes are prone to cause electrolyte and crystallization to remain at the liquid injection port and the surrounding, which has a serious impact on the subsequent processing quality, appearance quality, and even safety performance, such as pollution, corrosion, causing porosity and blasting of the sealing nail welding.

[0039] In order to avoid a series of adverse effects of electrolyte and crystallization at the liquid injection port on the process and product, in the prior art, the electrolyte and crystallization can be removed by manual wiping, automatic cleaning or adhesive film pasting before sealing nail welding, testing, film wrapping and the like.

[0040] Among them, manual wiping has problems of low efficiency, poor stability, damage to personnel health and the like; the automatic wiping and cleaning method needs to use certain mechanisms or auxiliary materials to realize wiping, blowing, adsorption or a combination of several schemes, which has problems of relatively complex structure, high cost of consumables, and being not conducive to later maintenance and the like; the adhesive film pasting method avoids electrolyte and crystallization residues to a certain extent, but this method has high requirements for adhesive effect, and it is difficult to paste evenly and smoothly inside the liquid injection port, which leads to electrolyte entering or poor air tightness, thereby affecting the liquid injection and formation process effect. In addition, after tearing off the adhesive film, there is a problem of residual adhesive.

[0041] In view of the above problems, the present application provides a supporting piece 10, as shown in Figures 1-4 and Figure 7 , which comprises: a clamping part 11 for clamping the surface of the top cover 20 at the battery liquid injection port 21; a liquid injection groove 12 arranged on one side of the clamping part 11, the liquid injection groove 12 is used for nesting with the liquid injection nozzle during battery liquid injection or the negative pressure suction nozzle during formation; a plug-in part 13 arranged on the side of the clamping part 11 away from the liquid injection groove 12 and protruding from the clamping part 11, the plug-in part 13 is used for plugging at the liquid injection hole 22 in the liquid injection port 21, and a first through hole 14 in communication with the liquid injection groove 12 is arranged through the plug-in part 13. As shown in Figures 5-6 , the liquid injection port 21 is provided on the top cover 20, and the liquid injection hole 22 is a through hole located at the middle position of the liquid injection port 21, which communicates the liquid injection port 21 with the inside of the battery.

[0042] In the present application, the above-mentioned supporting piece 10 can be used for liquid injection and formation of secondary batteries such as lithium ion batteries and sodium ion batteries.

[0043] Wherein, because when the supporting member 10 is assembled at the battery liquid injection port 21, the plug-in part 13 can be plugged at the liquid injection hole 22 in the liquid injection port 21, and the clamping part 11 can be clamped on the surface of the top cover 20 at the battery liquid injection port 21, the liquid injection groove 12 can be nested with the liquid injection nozzle during the battery liquid injection or the negative pressure suction nozzle during the formation, and the first through hole 14 in the plug-in part 13 is provided with a first through hole 14 in communication with the liquid injection groove 12, so that after the electrolyte flows out of the liquid injection nozzle during the liquid injection, the electrolyte directly enters the inside of the battery through the liquid injection groove 12 and the first through hole 14, avoiding the direct contact between the liquid injection nozzle or the negative pressure suction nozzle and the top cover 20 during the liquid injection or the formation, and achieving the effect that there is no electrolyte or its crystalline residue in the liquid injection port 21 and the area of the top cover 20 near the liquid injection port 21, thereby effectively improving the quality of the battery.

[0044] Optionally, in an embodiment, the clamping part 11 comprises a boss 111 extending from inside to outside and a first platform 112, the boss 111 is used for sinking into the liquid injection port 21 of the battery, and the first platform 112 is used for clamping on the surface of the top cover 20 at the liquid injection port 21 of the battery, and the boss 111 is provided with a second through hole 15 in communication with the liquid injection groove 12 and the first through hole 14.

[0045] Wherein, because the boss 111 can sink into the liquid injection port 21 of the battery, and the plug-in part 13 is arranged on the side of the clamping part 11 away from the liquid injection groove 12, specifically on the side of the boss 111 away from the liquid injection groove 12, so that the plug-in part 13 can also be smoothly inserted into the liquid injection port 21; at the same time, because the second through hole 15 is in communication with the liquid injection groove 12 and the first through hole 14, so that the first through hole 14 is in communication with the liquid injection groove 12, when the liquid injection groove 12 is nested with the liquid injection nozzle during the battery liquid injection, so that after the electrolyte flows out of the liquid injection nozzle during the liquid injection, the electrolyte directly enters the inside of the battery through the liquid injection groove 12, the second through hole 15 and the first through hole 14, avoiding the direct contact between the liquid injection nozzle and the top cover 20 during the liquid injection, and effectively preventing the electrolyte from polluting the top cover 20; when the liquid injection groove 12 is nested with the negative pressure suction nozzle during the formation of the battery, so that the generated gas and more electrolyte directly enter the negative pressure suction nozzle through the first through hole 14, the second through hole 15 and the liquid injection groove 12, thereby being discharged from the battery, avoiding the direct contact between the negative pressure suction nozzle and the top cover 20 during the formation, and effectively preventing the electrolyte from polluting the top cover 20.

[0046] The first platform 112 is a flat structure connecting the negative pressure nozzle and the supporting member 10 during formation, which can effectively prevent the electrolyte from polluting the top cover 20. Optionally, the first platform 112 is circular, square or irregular, and its size is larger than the liquid injection nozzle, the negative pressure nozzle and the liquid injection port 21, so as to be closely nested with the liquid injection nozzle during battery liquid injection or the negative pressure nozzle during formation. In a specific embodiment, the first platform 112 is a circular structure, and its thickness is greater than 0.1 mm, specifically 0.1-2 mm, and its diameter is 7-30 mm, which ensures that the negative pressure nozzle during formation can be completely contacted, so as not to affect the negative pressure effect during formation and to prevent the electrolyte from polluting the cover plate.

[0047] Optionally, in an embodiment, the second through hole 15 is aligned with the first through hole 14 for conduction, for example, it can be a concentric structure, and the two together form a channel for the electrolyte to enter the inside of the battery during liquid injection or a formation exhaust channel.

[0048] Optionally, in an embodiment, the side surface of the boss 111 is adapted to the liquid injection port 21, so that the boss 111 can be nested inside the liquid injection port 21, thereby playing a role in isolating the liquid injection nozzle from contacting the inner wall of the liquid injection port 21. Optionally, the boss 111 can be a cylindrical structure or a conical structure, which can better contact the inner wall of the liquid injection port 21. The diameter of the boss 111 is slightly smaller than the diameter of the liquid injection port 21, which can prevent the electrolyte or rubber from being polluted and facilitate the removal of the supporting member 10. Optionally, in a specific embodiment, the diameter of the boss 111 is 6-10 mm, and the depth is 2-10 mm.

[0049] Optionally, in an embodiment, the first platform 112 is perpendicular to the boss 111, specifically, the side of the first platform 112 facing the boss 111 is perpendicular to the side of the boss 111, which facilitates the insertion of the supporting member 10 into the liquid injection port 21 or the removal of the supporting member 10 from the liquid injection port 21.

[0050] Optionally, in an embodiment, the insertion part 13 is adapted to the liquid injection hole 22, specifically, the outer wall of the insertion part 13 is adapted to the liquid injection hole 22, so that the insertion part 13 can be nested with the side wall of the liquid injection hole 22, thereby playing a role in isolating the liquid injection nozzle from contacting the inner wall of the liquid injection hole 22. In addition, since the liquid injection hole 22 is a through hole located at the middle position of the liquid injection port 21, it communicates the liquid injection port 21 with the inside of the battery, and the first through hole 14 is arranged in the insertion part 13, and the insertion part 13 is adapted to the liquid injection hole 22, so that when the insertion part 13 is inserted into the liquid injection hole 22, the first through hole 14 and the liquid injection hole 22 can be better isolated, and the electrolyte flowing out of the first through hole 14 can be prevented from contacting the side wall of the liquid injection hole 22, thereby preventing the liquid injection hole 22 from being polluted.

[0051] Optionally, in one embodiment, the above-mentioned plug-in portion 13 includes a second platform 131 disposed at the bottom of the boss 111 and a protrusion 132 disposed on the side of the second platform 131 opposite to the boss 111. That is, the plug-in portion 13 is formed by the second platform 131 and the protrusion 132. The protrusion 132 is used to insert into the liquid injection hole 22, and the first through hole 14 penetrates the second platform 131 and the protrusion 132, thereby directly connecting the inside of the battery with the liquid injection nozzle or the negative pressure suction nozzle through the liquid injection groove 12, the second through hole 15 and the first through hole 14.

[0052] Optionally, the first through hole 14 extends through the insertion part 13 in a direction perpendicular to the first platform 112, making the gas-liquid transmission path shorter, which facilitates the inflow of electrolyte during battery injection and the outflow of gas and liquid during formation, thereby speeding up the process and saving process time.

[0053] Optionally, the second platform 131 is arranged parallel to the first platform 112, and the second platform 131 is perpendicular to the boss 111. Specifically, the side of the second platform 131 facing the boss 132 is perpendicular to the side of the boss 132, which makes it convenient to insert the boss 132 into the injection hole 22 or pull it out from the injection hole 22.

[0054] In this embodiment, the second platform 131 is a contact platform between the bottom of the support 10 and the bottom of the injection port 21, serving as an isolation and sealing function. Optionally, in one embodiment, the second platform 131 can be a circular planar structure with a diameter ranging from 6 to 10 mm and a thickness ranging from 0.1 mm to 1 mm.

[0055] Optionally, in one embodiment, the second platform 131 and the boss 111 are integrated, which can ensure the overall structural strength of the support member 10 and prevent the insertion part 13 from separating or falling off from the holding part 11 due to frequent insertion and removal.

[0056] Alternatively, in one implementation, such as Figures 3-4 As shown, the second platform 131 is interference-fitted to the bottom of the boss 111 via a cylinder and a hole, facilitating disassembly and replacement of the insertion part 13 when it is damaged due to electrolyte corrosion or other reasons. Optionally, in one specific embodiment, an assembly hole 16 is provided at the bottom of the boss 111, and an assembly post 17 facing the boss 111 is provided on the second platform 131, thereby interfering-fitting the second platform 111 to the bottom of the boss 111 via the assembly hole 16 and the assembly post 17.

[0057] Optionally, in one embodiment, the surface of the protrusion 111 facing the second platform 131 has a multi-layered annular structure or striped structure to improve the sealing effect between the protrusion 111 and the second platform 131, thereby achieving sealing and support and preventing electrolyte from entering the injection port 21 and causing residue.

[0058] Optionally, the material of the clamping part 11 is aluminum alloy, stainless steel, Teflon, polypropylene (PP), polyvinylidene fluoride (PVDF), or ethylene-propylene-diene rubber.

[0059] Optionally, the material of the plug-in part 13 is ethylene-propylene-diene rubber, which has low density, high filling, excellent aging resistance, corrosion resistance, electrical insulation, and ozone resistance, so that the plug-in part 13 does not need to be replaced frequently, and the support 10 does not pollute the inside of the battery.

[0060] In actual application, the support 10 needs to be assembled at the liquid injection port 21 before the battery is injected with liquid, and then the processes of primary injection, infiltration, formation, aging, secondary injection, recovery of the support 10, and sealing nail welding are sequentially performed. The specific operation process of assembly and recovery of the support 10 includes: before injection, the support 10 is assembled in the liquid injection port 21, the first through hole 14 is inserted into the liquid injection hole 22, the lower flat surface of the boss 111 is flatly attached to the bottom surface of the liquid injection port 21, the injection nozzle is inserted into the liquid injection groove 12 during injection, and is well attached to the liquid injection groove 12, the electrolyte enters the inside of the battery through the liquid injection hole 22, the second through hole 15, and the channel formed by the second through hole 15, the negative pressure suction nozzle is flatly attached to the support 10 during formation, and the electrolyte or crystal is left on the support 10 rather than the liquid injection port 21 and its surrounding; when the support 10 is recovered, the support 10 is removed and cleaned with alcohol for subsequent reuse.

[0061] It should be noted that the top cover 20 or the cover plate applicable in the embodiments of the present application only provides one application scenario, and should not be restricted or limited, and the applicable scenario should be considered as a similar structure for achieving injection or formation through the liquid injection port 21, which is not limited to square batteries, cylindrical batteries, and the like.

[0062] In summary, the support 10 provided in the embodiments of the present application can avoid electrolyte or crystal residue in the process of lithium batteries and the like, is easy to automate, convenient to maintain, reusable, reduces production cost, and improves processing and appearance quality.

[0063] In order to solve the above problems, the embodiments of the present application also provide a battery cleaning method based on the above support 10, as shown in Figure 8 The cleaning method includes steps 101-104.

[0064] Step 101, before the battery is injected with liquid, the support is assembled in the liquid injection port of the battery, and the plug-in part is plugged into the liquid injection hole 22 in the liquid injection port.

[0065] In this step, because the clamping portion of the supporting member can clamp the surface of the top cover at the liquid injection port of the battery, and the plug-in portion is arranged on the side of the clamping portion away from the liquid injection groove and protrudes from the clamping portion, the plug-in portion can be plugged into the liquid injection hole in the liquid injection port,

[0066] Step 102, after the plug-in portion is plugged into the liquid injection hole in the liquid injection port, the liquid injection nozzle is nested in the liquid injection groove and liquid injection is performed.

[0067] In this step, because the liquid injection groove is arranged on the side of the clamping portion, the liquid injection groove is used for nesting the liquid injection nozzle during liquid injection of the battery or the negative pressure suction nozzle during formation to assemble the supporting member, and the first through hole in communication with the liquid injection groove is arranged through the plug-in portion, so that after the plug-in portion is plugged into the liquid injection hole in the liquid injection port, when the liquid injection groove is nested with the liquid injection nozzle during liquid injection of the battery, the electrolyte flows out of the liquid injection nozzle during liquid injection and directly enters the inside of the battery through the liquid injection groove, the second through hole and the first through hole, avoiding direct contact between the liquid injection nozzle and the top cover during the liquid injection process, and effectively preventing the electrolyte from polluting the top cover.

[0068] Step 103, after liquid injection of the battery, the negative pressure suction nozzle is nested in the liquid injection groove and formation is performed.

[0069] In this step, because the liquid injection groove is arranged on the side of the clamping portion, the liquid injection groove is used for nesting the liquid injection nozzle during liquid injection of the battery or the negative pressure suction nozzle during formation to assemble the supporting member, and the first through hole in communication with the liquid injection groove is arranged through the plug-in portion, so that after the plug-in portion is plugged into the liquid injection hole in the liquid injection port, when the liquid injection groove is nested with the negative pressure suction nozzle during formation of the battery, the gas and excess electrolyte directly enter the negative pressure suction nozzle through the first through hole, the second through hole and the liquid injection groove, thereby being discharged from the battery, avoiding direct contact between the negative pressure suction nozzle and the top cover during the formation process, and effectively preventing the electrolyte from polluting the top cover.

[0070] Step 104, after formation, the supporting member is taken out of the liquid injection port; or after formation and re-liquid injection, the supporting member is taken out of the liquid injection port.

[0071] In this step, after formation, if liquid injection is not required, the supporting member can be taken out of the liquid injection port, that is, other battery preparation processes such as sealing pin welding can be performed; or after formation, one or more liquid injections can be performed based on the above supporting member, and then the supporting member is taken out of the liquid injection port, that is, other battery preparation processes such as sealing pin welding can be performed again; and the removed supporting member can be cleaned with alcohol or the like for subsequent reuse.

[0072] The battery cleaning method provided by the embodiments of the present application can avoid direct contact between the liquid injection nozzle or the negative pressure suction nozzle and the top cover during the liquid injection or formation process by assembling the supporting member at the liquid injection port of the battery during the liquid injection and formation, so that no electrolyte or crystal thereof is left in the liquid injection port and the top cover area near the liquid injection port, thereby effectively improving the quality of the battery.

[0073] The present application also provides a secondary battery, wherein the secondary battery is obtained by the naked battery through the above cleaning method, specifically through the assembly of the supporting member, the liquid injection, the formation, the recycling of the supporting member, the second sealing and the sorting.

[0074] The secondary battery is obtained by the second sealing and the sorting of the naked battery cleaned by the cleaning method provided by the embodiments of the present application after the negative electrode sheet and the positive electrode sheet and the diaphragm are wound to obtain the winding core, and the winding core is packaged to obtain the naked battery.

[0075] The present application also provides a secondary battery, wherein the secondary battery is obtained by the naked battery through the above cleaning method, specifically through the assembly of the supporting member, the liquid injection, the formation, the recycling of the supporting member, the second sealing and the sorting.

[0076] The electrolyte in the electrolyte injected in the liquid injection plays a role in conducting ions between the positive electrode sheet and the negative electrode sheet, and the electrolyte can be in a liquid state, a gel state or a full solid state. In some embodiments, the above electrolyte uses an electrolyte, and the electrolyte includes an electrolyte salt and a solvent, and the electrolyte salt is a lithium salt.

[0077] For the above-mentioned secondary battery embodiments, they include a naked battery, which is obtained by the above-mentioned method and can achieve the same technical effects. To avoid repetition, this will not be described here again, and the relevant part can be referred to the part of the cleaning method embodiments.

[0078] The present application also provides a power consuming device, which includes the above-mentioned secondary battery, and the secondary battery serves as the power supply of the power consuming device.

[0079] For the above-mentioned power consuming device embodiments, they include the above-mentioned secondary battery, and the secondary battery includes a naked battery, which is obtained by the above-mentioned method and can achieve the same technical effects. To avoid repetition, this will not be described here again, and the relevant part can be referred to the part of the cleaning method embodiments.

[0080] In order to make the purposes, technical solutions and beneficial effects of the present application clearer, the present application will be further described below in combination with embodiments. It should be understood that these embodiments are only used to illustrate the present application and not to limit the scope of the present application.

[0081] In summary, in the present embodiment, the provided supporting member 10 comprises a clamping portion 11 for clamping the surface of the top cover 20 at the battery liquid injection port 21, a liquid injection groove 12 arranged on one side of the clamping portion 11, the liquid injection groove 12 being used for embedding the liquid injection nozzle during battery liquid injection or the negative pressure suction nozzle during formation, a plug-in portion 13 arranged on the side of the clamping portion 11 away from the liquid injection groove 12 and protruding from the clamping portion 11, the plug-in portion 13 being used for plugging at the liquid injection hole 22 in the liquid injection port 21, and a first through hole 14 being arranged through the plug-in portion 13 and being in communication with the liquid injection groove 12. By assembling the supporting member 10 at the battery liquid injection port 21 during liquid injection and formation, the liquid injection nozzle or the negative pressure suction nozzle is prevented from directly contacting the top cover 20 during liquid injection or formation, the effect of no electrolyte or its crystalline residue remaining in the liquid injection port 21 and the region of the top cover 20 near the liquid injection port 21 can be achieved, and thus the quality of the battery can be effectively improved.

[0082] Although the preferred embodiments of the present application have been described, those skilled in the art who are informed of the basic inventive concept can make additional changes and modifications to the embodiments. Therefore, the claims are intended to include the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0083] The above describes in detail the supporting member provided by the present application, and the principles and implementation manners of the present application are described by using specific examples. The above embodiment descriptions are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range can be changed, and the above description of the present application should not be understood as a limitation.

Claims

1. A support member, characterized by, The utility model relates to a battery top cover clamping device, comprising: a clamping part for clamping the surface of the top cover at the battery liquid injection port; a liquid injection groove arranged on one side of the clamping part, the liquid injection groove being used for embedding a liquid injection nozzle or a negative pressure suction nozzle during battery liquid injection or formation; a plug-in part arranged on the side of the clamping part away from the liquid injection groove and protruding from the clamping part, the plug-in part being used for plugging into the liquid injection hole in the liquid injection port, and a first through hole being arranged through the plug-in part and being in communication with the liquid injection groove.

2. The bolster of claim 1, wherein The clamping part comprises a boss extending from inside to outside and a first platform, the boss being used for sinking into the liquid injection port, the first platform being clamped on the surface of the top cover at the battery liquid injection port, a second through hole being arranged in the boss, the second through hole being in communication with the liquid injection groove and the first through hole.

3. The bolster of claim 2, wherein, The second through hole is in communication with the first through hole in alignment.

4. The bolster of claim 2, wherein The first through hole penetrates the plug-in part in a direction perpendicular to the first platform.

5. The bolster of claim 2, wherein, The first platform is perpendicular to the boss.

6. The bolster of claim 2, wherein, The plug-in part comprises a second platform arranged at the bottom of the boss and a protrusion arranged on the side of the second platform away from the boss, and the first through hole penetrates the second platform and the protrusion.

7. The bolster of claim 6, wherein, The side surface of the boss is adapted to the liquid injection port. And / or the protrusion is adapted to the liquid injection hole.

8. The bolster of claim 7, wherein, The second platform is assembled on the bottom of the boss by interference of a cylinder and a hole.

9. The bolster of claim 6, wherein, The surface of the boss towards the second platform has a multi-layer annular structure or a stripe structure.

10. The bolster of claim 1, wherein The material of the clamping part is aluminum alloy, stainless steel, Teflon, polypropylene, polyvinylidene fluoride or ethylene-propylene-diene rubber; and / or The material of the plug-in part is ethylene-propylene-diene rubber.

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