Single battery and electric equipment

Abstract

The embodiment of the utility model discloses a single battery and electric equipment, and the single battery comprises a shell which is provided with a containing cavity and an opening, and the opening is arranged at one end of the shell; the top cover sheet comprises a substrate and a positioning piece; the substrate covers the opening of the shell; the substrate is provided with a first surface and a second surface, and the second surface faces the accommodating cavity; the substrate is provided with a pole hole; the positioning piece is arranged on the second surface, and a clamping groove is formed between the positioning piece and the substrate in the first direction; the pole comprises a pole main body and a flange arranged on the periphery of the pole main body; the pole main body is arranged in the pole hole in a penetrating manner, and the flange is embedded in the clamping groove; the upper insulating part is at least partially clamped between the pole and the top cover plate; the upper insulating part is provided with a top surface opposite to the accommodating cavity, and the top surface protrudes out of the first surface. According to the invention, the creepage distance between the substrate and the pole is increased, and the height difference between the top surface and the first surface can prevent electrolyte from flowing to the pole.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a single battery and electrical equipment. Background Art

[0002] The power battery is an energy supply device for electric vehicles and one of the important components of electric vehicles. A typical power battery includes a top cover assembly, a shell and a battery cell. The top cover assembly is used to form a cavity for placing the battery cell together with the shell, and is also used to achieve conduction between the battery cell and external electrical devices.

[0003] In the prior art, the top surface of the upper insulating member is usually substantially flush with the upper surface of the top cover, the creepage distance between the top cover sheet and the pole is insufficient, and the electrolyte can easily pass through the upper insulating member and enter the pole from the top cover sheet, posing the risk of corroding the pole and short-circuiting the single cell. Utility Model Content

[0004] The embodiments of the utility model provide a single cell and an electrical device, so as to increase the creepage distance between a substrate and a pole, and prevent the electrolyte from flowing to the pole.

[0005] In order to solve the above technical problems, the embodiments of the present utility model disclose the following technical solutions:

[0006] In one aspect, a single cell is provided, the single cell having a first direction, comprising:

[0007] A housing having a containing cavity and an opening, wherein the opening is arranged at one end of the housing in the first direction and communicates with the containing cavity;

[0008] A top cover sheet, comprising a substrate and a positioning member; the substrate is sealed at the open portion of the shell; the two surfaces of the substrate in the first direction are respectively a first surface and a second surface, and the second surface faces the accommodating cavity; the substrate is provided with a pole hole, and the pole hole is arranged through along the first direction; the positioning member is arranged on a side of the second surface close to the pole hole and protrudes from the second surface, and a clamping groove is formed between the positioning member and the substrate;

[0009] A pole, comprising a pole body and a flange, wherein the flange is arranged on the outer periphery of the pole body; the pole body is inserted into the pole hole, and the flange is embedded in the clamping groove;

[0010] The upper insulating member is at least partially sandwiched between the pole and the top cover sheet; the upper insulating member has a top surface facing away from the accommodating cavity, and the top surface protrudes from the first surface.

[0011] In addition to or as an alternative to one or more of the features disclosed above, two end faces of the pole body in the first direction are respectively a first end face and a second end face, and the first end face and the first surface are arranged on the same side;

[0012] Wherein, the first end surface protrudes from the top surface.

[0013] In addition to or as an alternative to one or more of the features disclosed above, the outer edge of the pole body has a step portion recessed toward the second end surface, and the step portion is arranged around the pole body;

[0014] The upper insulating member includes an upper insulating member body and a first extension portion connected to the upper insulating member body, the upper insulating member body is clamped between the pole body and the pole hole wall, the first extension portion extends toward the axial direction of the pole body, and the first extension portion is at least partially engaged with the step portion.

[0015] In addition to or as an alternative to one or more features disclosed above, the first extension portion has a first groove, and the first groove penetrates the first extension portion along a radial direction of the pole hole.

[0016] In addition to or as an alternative to one or more of the features disclosed above, the upper insulator further comprises a second extension portion, which is disposed at an end of the upper insulator body away from the first extension portion, and the second extension portion is sandwiched between the flange and the substrate.

[0017] In addition to one or more of the features disclosed above, or as an alternative, the upper insulating member further includes a third extension portion connected to the upper insulating member body, the third extension portion extends in the radial direction of the pole hole, the extension direction of the third extension portion is away from the first extension portion, and the third extension portion covers the first surface of the substrate around the pole hole; the top surface includes a first sub-top surface and a second sub-top surface, the surface of the first extension portion on the same side as the first surface is configured as the first sub-top surface, and the surface of the third extension portion on the same side as the first surface is configured as the second sub-top surface,

[0018] Wherein, in the first direction, the distance between the second sub-top surface and the second surface is equal to or smaller than the distance between the first sub-top surface and the second surface.

[0019] In addition to or as an alternative to one or more features disclosed above, the second sub-top surface is an inclined surface inclined toward the first surface.

[0020] In addition to or as an alternative to one or more features disclosed above, the third extending portion is provided with a second groove, the second groove extends in a radial direction of the pole hole, and a notch of the second groove is connected to an outer edge of the third extending portion.

[0021] In addition to or as an alternative to one or more of the features disclosed above, the positioning member includes:

[0022] a supporting portion, which is spaced apart from the substrate in the first direction;

[0023] A clamping portion connecting the support portion and the substrate;

[0024] Wherein, the base plate, the clamping portion and the supporting portion surround and form the annular clamping groove, and the flange is at least partially accommodated in the clamping groove.

[0025] In addition to or as an alternative to one or more of the features disclosed above, a sealing member includes a first sealing portion and a second sealing portion connected to each other, wherein the first sealing portion is arranged along the axial direction of the pole, the first sealing portion is sandwiched between the positioning member and the flange, and the second sealing portion is sandwiched between the substrate and the flange;

[0026] An insulating ring, comprising a first insulating portion, a second insulating portion and a third insulating portion connected to each other; the first insulating portion is arranged along the radial direction of the pole, and the first insulating portion is clamped between the flange and the positioning member; the second insulating portion is connected to an end of the first insulating portion away from the accommodating cavity, the second insulating portion is arranged along the axial direction of the pole, and the second insulating portion is clamped between the flange and the positioning member; the third insulating portion is connected to an end of the first insulating portion close to the accommodating cavity, the third insulating portion is arranged along the radial direction of the pole, and the third insulating portion is clamped between the pole body and the positioning member.

[0027] On the other hand, an electrical device is further disclosed. In addition to or as an alternative to one or more of the features disclosed above, the electrical device includes a single battery as described in any one of the above items.

[0028] One of the above technical solutions has the following advantages or beneficial effects: in the present application, the top surface of the upper insulating part protrudes from the first surface of the substrate, thereby increasing the creepage distance between the substrate and the pole. The height difference between the top surface and the first surface can prevent the electrolyte from flowing to the pole, thereby reducing the risk of the pole being corroded by the electrolyte and the risk of short circuit of the single cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The technical solutions and other beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0030] Figure 1 It is a structural schematic diagram of a single cell provided according to the first embodiment of the utility model.

[0031] Figure 2 It is a schematic diagram of the disassembled structure of the top cover assembly in the single cell provided according to the first embodiment of the utility model.

[0032] Figure 3 It is a structural schematic diagram of a top cover assembly in a single cell provided according to the first embodiment of the utility model.

[0033] Figure 4 It is a cross-sectional view of a top cover assembly in a single cell provided according to the first embodiment of the utility model.

[0034] Figure 5 yes Figure 4 Enlarged schematic diagram of detail A.

[0035] Figure 6 It is a schematic structural diagram of an upper insulating member in a single cell provided according to the first embodiment of the utility model.

[0036] Figure 7 It is a structural schematic diagram of a top cover assembly in a single cell provided according to the second embodiment of the utility model.

[0037] Figure 8 It is a cross-sectional view of a top cover assembly in a single cell provided according to the second embodiment of the utility model.

[0038] Fig. 9 yes Figure 8 Enlarged schematic diagram of detail B in the figure.

[0039] Fig.10 It is a schematic structural diagram of an upper insulating member in a single cell provided in Embodiment 2 of the present utility model.

[0040] Fig.11 It is a structural schematic diagram of a top cover assembly in a single cell provided according to the third embodiment of the utility model.

[0041] Fig.12 It is a cross-sectional view of a top cover assembly in a single cell provided according to the third embodiment of the utility model.

[0042] Fig.13 yes Fig.12 Enlarged schematic diagram of detail C in the figure.

[0043] Fig.14 It is a schematic structural diagram of an upper insulating member in a single cell provided according to the third embodiment of the utility model.

[0044] Fig.15It is a structural schematic diagram of a top cover assembly in a single cell provided according to the fourth embodiment of the utility model.

[0045] Fig.16 It is a cross-sectional view of a top cover assembly in a single cell provided according to the fourth embodiment of the utility model.

[0046] Fig.17 yes Fig.16 Enlarged schematic diagram of detail D in the figure.

[0047] Fig.18 It is a schematic structural diagram of an upper insulating member in a single cell provided according to the fourth embodiment of the utility model.

[0048] In the figure: 10-top cover sheet; 20-housing;

[0049] 100-upper insulating member; 101-upper insulating member body; 1001-top surface; 1101-first sub-top surface; 110-first extension portion; 111-first groove; 120-second extension portion; 130-third extension portion; 131-second groove; 1301-second sub-top surface;

[0050] 200-pole; 201-pole body; 2001-first end surface; 2002-second end surface; 210-step portion; 220-flange;

[0051] 300-substrate; 3001-first surface; 3002-second surface; 310-pole hole; 320-positioning member; 3201-clamping groove; 321-supporting part; 322-clamping part; 330-sunken part;

[0052] 400-seal; 401-first seal; 402-second seal;

[0053] 500-insulating ring; 501-first insulating portion; 502-second insulating portion; 503-third insulating portion;

[0054] 600-lower plastic parts. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and beneficial effects of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining the utility model, and are not intended to limit the utility model.

[0056] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" 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 present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0057] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, 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 utility model can be understood according to specific circumstances.

[0058] In the present utility model, unless otherwise clearly stipulated 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 above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0059] See also Figure 1 , Figure 1The schematic diagram of the structure of a single cell provided according to the first embodiment of the present invention is shown. The single cell provided in the first embodiment of the present application has a first direction Z, a second direction X and a third direction Y that intersect and are perpendicular to each other. The single cell includes a shell 20, a top cover assembly and a battery cell. The shell 20 is a square shell structure, and the shell 20 has a receiving cavity inside for accommodating the battery cell. The shell 20 is provided with an opening at one end in the first direction Z, and the opening is connected to the receiving cavity. The top cover assembly is sealed at the opening so that the receiving cavity forms a closed space to prevent the internal electrolyte from flowing out.

[0060] See also Figure 2 , Figure 2 The schematic diagram of the disassembled structure of the top cover assembly in the single cell provided according to the first embodiment of the utility model is shown, and the top cover assembly includes a top cover sheet 10, a pole 200, an upper insulating member 100, a sealing member 400 and an insulating ring 500. The top cover sheet 10 is used to close the opening of the outer shell 20, and the pole 200 is used to realize the electrical connection between the battery cell and the external electrical device. At the same time, the top cover sheet 10 also has a positioning function. The upper insulating member 100 and the insulating ring 500 are used to realize the insulation between the pole 200 and the top cover sheet 10. The sealing member 400 is used to seal the gap between the pole 200 and the top cover sheet 10 to ensure the sealing effect of the accommodating cavity.

[0061] Combination Figure 3 As shown, the top cover sheet 10 includes a substrate 300 and a positioning member 320. The substrate 300 is a rectangular plate-shaped structure, and the length direction of the substrate 300 extends along the second direction X. The substrate 300 is sealed at the open part of the shell 20. The substrate 300 has a first surface 3001 and a second surface 3002 opposite to each other in the first direction Z, wherein the second surface 3002 faces the accommodating cavity. A pair of pole holes 310 are provided on the substrate 300, and the pole holes 310 penetrate the substrate 300 along the first direction Z, and the pole holes 310 are used to install the pole 200. An explosion-proof valve is also provided on the substrate 300. When the air pressure in the single cell accommodating cavity is too high, the explosion-proof valve will open to allow the gas in the accommodating cavity to be discharged to the outside of the elevator battery. An injection hole is also provided on the substrate 300, and the injection hole is used to inject electrolyte into the accommodating cavity. After the injection is completed, a sealing device is used to seal the injection port by welding.

[0062] Furthermore, the material of the substrate 300 includes aluminum or other metal materials, so that the substrate 300 has electrical conductivity and a certain strength to protect the internal battery cells.

[0063] Combination Figure 4 , Figure 5 As shown, Figure 4 and Figure 5The schematic diagram and the cross-sectional view of the structure of the top cover assembly in the single cell provided according to the embodiment of the utility model are respectively shown. The pole 200 is inserted into the pole hole 310, and the pole 200 includes a pole body 201 and a flange 220, wherein the pole body 201 is a columnar structure, and the flange 220 is arranged around the pole body 201, and is used to cooperate with the positioning member 320 to achieve axial fixation of the pole 200. In the first direction Z, the pole body 201 has a first end face 2001 and a second end face 2002 opposite to each other, the first end face 2001 is away from the accommodating cavity, and the second end face 2002 is toward the accommodating cavity, and the first end face 2001 protrudes from the first surface 3001 of the substrate 300, so that the pole body 201 is exposed from the pole hole 310, so as to be connected to an external electrical device. The outer edge of the first end surface 2001 of the pole body 201 has a step portion 210 recessed toward the second end surface 2002 . The step portion 210 surrounds the pole body 201 and is used for laying the first extension portion 110 (hereinafter referred to) of the upper insulating member 100 .

[0064] The positioning member 320 is arranged on the second surface 3002 of the substrate 300. The positioning member 320 is an annular structure. The substrate 300 is provided with a pole hole 310. The positioning member 320 is arranged on a side of the substrate 300 close to the pole hole 310 and is convexly arranged on a side of the substrate 300 facing the battery cell, so that a clamping groove 3201 for clamping the pole 200 is formed between the positioning member 320 and the substrate 300. The positioning member 320 includes a supporting portion 321 and a clamping portion 322. The supporting portion 321 is spaced apart from the substrate 300 in the first direction Z, and the clamping portion 322 connects the substrate 300 and the supporting portion 321. In the first direction Z, the substrate 300, the supporting portion 321 and the clamping portion 322 are arranged to form the clamping groove 3201. The positioning member 320 and the substrate 300 can be an integrated structure. For example, a cylindrical thin-walled structure is formed on the lower surface of the substrate 300. The thin-walled structure is arranged around the pole hole 310, and the lower part of the thin-walled structure is bent radially inward to form a support portion 321, and the unbent part of the thin-walled structure forms a clamping portion 322. There is a gap between the substrate 300 and the positioning member 320 and the pole 200. The upper insulating member 100, the sealing member 400 and the insulating ring 500 are sequentially arranged in the gap along the first direction Z. The upper insulating member 100 is farther away from the sealed cavity than the insulating ring 500. The pole 200 is abutted against the top cover sheet 10 through the upper insulating member 100, the sealing member 400 and the insulating ring 500 to prevent the pole 200 and the top cover sheet 10 from being directly electrically conductive, and to seal the gap to prevent leakage of the electrolyte in the accommodating cavity.

[0065] Furthermore, the material of the pole 200 includes copper, aluminum or a composite material of copper and aluminum.

[0066] Combination Figure 5 , Figure 6 As shown, Figure 6 The schematic diagram of the structure of the upper insulating member 100 in the single cell provided in the first embodiment of the utility model is shown. The upper insulating member 100 is an annular structure. The upper insulating member 100 is sleeved on the outer periphery of the pole 200 and partially sandwiched between the pole 200 and the top cover sheet 10. The upper insulating member 100 has a top surface 1001 on the same side as the first end surface 2001 and the first surface 3001. In the first direction Z, the top surface 1001 is away from the accommodating cavity relative to the first surface 3001, and the first end surface 2001 is away from the accommodating cavity relative to the top surface 1001, that is, the first end surface 2001 protrudes from the top surface 1001, and the top surface 1001 protrudes from the first surface 3001. The heights of the first surface 3001, the top surface 1001 and the first end surface 2001 increase in sequence, and the whole is in a stepped shape, which prevents the electrolyte from flowing from the first surface 3001 to the first end surface 2001, thereby avoiding the short circuit of the single cell caused by the electrolyte. The upper insulator 100 includes an upper insulator body 101, a first extension 110 and a second extension 120, wherein the upper insulator body 101 is sandwiched between the pole body 201 and the hole wall of the pole hole 310, the first extension 110 is connected to one end of the upper insulator body 101 away from the accommodating cavity, and the first extension 110 extends toward the axial direction of the pole body 201 and covers the step 210 of the pole body 201, so as to increase the creepage distance between the top cover sheet 10 and the pole 200, so that it is difficult for the electrolyte to enter the pole 200 from the top cover sheet 10 through the upper insulator 100, thereby reducing the risk of the pole 200 being corroded by the electrolyte or the single cell short circuit. The first extension 110 has a first sub-top surface 1101 on the same side as the first end surface 2001 and the first surface 3001. In this embodiment, the first sub-top surface 1101 is configured as the top surface 1001 of the upper insulator 100. In the first direction Z, the first sub-top surface 1101 protrudes from the first surface 3001, and the first end surface 2001 protrudes from the first sub-top surface 1101, further reducing the risk of the pole 200 being corroded by the electrolyte or the single cell short circuit. The first sub-top surface 1101 is lower than the first end surface 2001 of the pole 200, which can prevent the upper insulating member 100 from being burned by the welding heat effect during the welding of the pole 200 and the busbar, thereby causing functional failure. The second extension portion 120 is connected to one end of the upper insulating member body 101 close to the accommodating cavity, and the second extension portion 120 extends in a radial direction away from the pole 200. The second extension portion 120 is sandwiched between the substrate 300 and the flange 220, further improving the insulation isolation effect between the top cover sheet 10 and the pole 200.

[0067] Further, in the first direction Z, there is a height difference hmm between the first end surface 2001 and the top surface 1001, satisfying 0<h≤0.5. When the height difference between the first end surface 2001 and the top surface 1001 is smaller, the height of the upper insulating member 100 protruding from the first surface 3001 of the substrate 300 is higher, and the effect of the upper insulating member 100 in blocking the electrolyte is better.

[0068] Further, the material of the upper insulating member 100 includes at least one of PPS, PP, LCP, PET, and PC.

[0069] Continue to refer to Figure 5 As shown, the pole 200 and the top cover sheet 10 are insulated by the seal 400 and the insulating ring 500, and the sealing of the accommodating cavity is achieved by the seal 400. In the first direction Z, the seal 400 and the insulating ring 500 are respectively arranged on the upper and lower sides of the flange 220, so as to respectively achieve insulation between the flange 220 and the substrate 300, the clamping part 322, and the flange 220 and the support part 321. Specifically, the seal 400 is embedded in the clamping groove 3201. The seal 400 includes a first sealing part 401 and a second sealing part 402 connected to each other. The first sealing portion 401 is arranged along the axial direction of the pole 200 and is clamped between the clamping portion 322 of the positioning member 320 and the flange 220. The second sealing portion 402 is connected to one end of the first sealing portion 401 away from the accommodating cavity. The second sealing portion 402 extends along the radial direction of the pole 200 and is clamped between the substrate 300 and the flange 220. The insulating ring 500 is partially embedded in the clamping groove 3201, and the insulating ring 500 includes a first insulating portion 501, a second insulating portion 502 and a third insulating portion 503 that are connected. The first insulating portion 501 is arranged radially along the pole 200, and the first insulating portion 501 is clamped between the flange 220 and the support portion 321; the second insulating portion 502 is connected to the end of the first insulating portion 501 away from the accommodating cavity, and the second insulating portion 502 is arranged axially along the pole 200, and the second insulating portion 502 is clamped between the pole body 201 and the clamping portion 322, and the second insulating portion 502 abuts against the first sealing portion 401 of the sealing member 400, further improving the top cover sheet 1 0 has the effect of insulating and isolating the pole 200; the third insulating part 503 is connected to one end of the first insulating part 501 close to the accommodating cavity, the third insulating part 503 is arranged along the axial direction of the pole 200, the third insulating part 503 is clamped between the pole body 201 and the supporting part 321, and the third insulating part 503 is in contact with the lower plastic part 600 laid on the second surface 3002 of the substrate 300 and the lower surface of the positioning member 320, so as to play the role of insulating and isolating the top cover sheet 10 from the battery cell.

[0070] Embodiment 2

[0071] Combination Figure 7 to Figure 10 As shown, Figure 7 to Figure 10 A single cell proposed in the second embodiment of the utility model is shown. Compared with the first embodiment, the upper insulating member 100 in this embodiment further includes a third extension portion 130 connected to the upper insulating member body 101. The third extension portion 130 is connected to one end of the upper insulating member body 101 away from the accommodating cavity. The third extension portion 130 extends in a radial direction away from the pole 200. The extension direction of the third extension portion 130 is opposite to the extension direction of the first extension portion 110. The first surface 3001 of the substrate 300 is provided with a sinking portion 330 that is recessed toward the second surface 3002. The sinking portion 330 is arranged around the pole hole 310, and the third extension portion 130 is partially accommodated in the sinking portion 330. The third extension portion 130 further increases the creepage distance between the top cover sheet 10 and the pole 200, and has a better effect of blocking the electrolyte from flowing from the top cover sheet 10 to the pole 200. The third extension portion 130 has a second sub-top surface 1301 on the same side as the first surface 3001 and the first end surface 2001. In this embodiment, the first sub-top surface 1101 of the first extension portion 110 and the second sub-top surface 1301 of the third extension portion 130 form the top surface 1001 of the upper insulating member 100.

[0072] In this embodiment, the third extension portion 130 is an annular structure. In other embodiments, the third extension portion 130 may be a square or other shapes, which are not specifically limited here.

[0073] Embodiment 3

[0074] Combination Figure 11 to Figure 14 As shown, Figure 11 to Figure 14 A single cell proposed in the third embodiment of the utility model is shown. Compared with the second embodiment, the third extension part 130 in this embodiment is a slope structure, and the second sub-top surface 1301 of the third extension part 130 is a slope inclined toward the first surface 3001. Compared with the second sub-top surface 1301 of the plane, the second sub-top surface 1301 of the slope has a longer radial path, which increases the creepage distance between the top cover sheet 10 and the pole 200, further reducing the risk of the pole 200 being corroded by the electrolyte or the single cell short circuit. The third extension part 130 of the slope structure facilitates the electrolyte on the pole 200 to be guided away from the pole 200, avoiding a large amount of electrolyte adhering to the first end surface 2001 of the pole 200, and reducing the risk of the pole 200 being corroded by the electrolyte.

[0075] Combination Fig.13 and Fig.14As shown, the first extension portion 110 has at least one first groove 111, and the first groove 111 penetrates the first extension portion 110 along the radial direction of the pole hole 310. The first groove 111 is formed by the first sub-top surface 1101 of the first extension portion 110 being recessed toward the accommodating cavity. The first groove 111 can further guide the electrolyte to flow to the pole 200. When a small amount of electrolyte flows to the first extension portion 110, it will be accommodated in the first groove 111 and discharged through the third extension portion 130 with an inclined structure, which also facilitates the electrolyte to be quickly discharged from the first extension portion 110 to the second extension portion 120 from the first end surface 2001 of the pole 200, thereby reducing the risk of the pole 200 being corroded by the electrolyte or the single battery being short-circuited.

[0076] In this embodiment, four first grooves 111 are evenly arranged in sequence along the axial direction of the first extension portion 110. In other embodiments, the number of the first grooves 111 may be more than four or less than four, which is not specifically limited here.

[0077] Embodiment 4

[0078] Combination Figure 15 to Figure 18 As shown, Figure 15 to Figure 18 A single cell proposed in the fourth embodiment of the utility model is shown. Compared with the third embodiment, in this embodiment, the third extension part 130 has a second groove 131, which is arranged at one end of the second sub-top surface 1301 of the third extension part 130 away from the pole 200. The second groove 131 extends in the radial direction of the pole hole 310, and the notch of the second groove 131 is connected to the outer edge of the third extension part 130. Since there is a step difference between the groove bottom of the second groove 131 and the second sub-top surface 1301 area of ​​the third extension part 130 where the second groove 131 is not arranged, the second groove 131 can block the electrolyte flowing into the second groove 131 from flowing to the pole 200 through the upper insulating member 100, and also increase the creepage distance between the top cover sheet 10 and the pole 200. When a small amount of electrolyte flows to the third extension part 130, it will be accommodated in the second groove 131 and discharged from the second groove 131 through the notch connected to the outer edge. The second groove 131 further reduces the risk of the electrode 200 being corroded by the electrolyte or the single cell short circuit.

[0079] In this embodiment, the second groove 131 is a strip groove structure extending in the radial direction of the pole hole 310. In other embodiments, the second groove 131 may also be a circular or arc groove structure, which is not specifically limited here.

[0080] The present application further discloses an electrical device, which includes the single battery as described above.

[0081] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A single cell battery, characterized in that: The single cell has a first direction (Z), and the single cell comprises: A housing (20) having a containing cavity and an opening, wherein the opening is arranged at one end of the housing (20) in the first direction (Z) and is in communication with the containing cavity; A top cover sheet (10), comprising a substrate (300) and a positioning member (320); the substrate (300) is sealed at the open portion of the housing (20); the two surfaces of the substrate (300) in the first direction (Z) are respectively a first surface (3001) and a second surface (3002), the second surface (3002) facing the accommodating cavity; the substrate (300) is provided with a pole hole (310), the pole hole (310) being arranged through along the first direction (Z); the positioning member (320) is arranged on a side of the second surface (3002) close to the pole hole (310) and is convexly arranged on the second surface (3002), and a clamping groove (3201) is formed between the positioning member (320) and the substrate (300); A pole (200), comprising a pole body (201) and a flange (220), wherein the flange (220) is arranged on the outer periphery of the pole body (201); the pole body (201) is inserted into the pole hole (310), and the flange (220) is embedded in the clamping groove (3201); An upper insulating member (100) is at least partially sandwiched between the pole (200) and the top cover sheet (10); the upper insulating member (100) has a top surface (1001) facing away from the accommodating cavity, and the top surface (1001) protrudes from the first surface (3001).

2. The single cell according to claim 1, characterized in that: The two end faces of the pole body (201) in the first direction (Z) are respectively a first end face (2001) and a second end face (2002), and the first end face (2001) and the first surface (3001) are arranged on the same side; Wherein, the first end surface (2001) protrudes from the top surface (1001).

3. The single cell according to claim 2, characterized in that: The outer edge of the pole body (201) has a step portion (210) recessed toward the second end surface (2002), and the step portion (210) is arranged around the pole body (201); The upper insulating member (100) comprises an upper insulating member body (101) and a first extension portion (110) connected to the upper insulating member body (101); the upper insulating member body (101) is sandwiched between the pole body (201) and the wall of the pole hole (310); the first extension portion (110) extends in the axial direction of the pole body (201); and the first extension portion (110) is at least partially engaged with the step portion (210).

4. The single cell according to claim 3, characterized in that: The first extension portion (110) has a first groove (111), and the first groove (111) penetrates the first extension portion (110) along the radial direction of the pole hole (310).

5. The single cell according to claim 3, characterized in that: The upper insulating member (100) further comprises a second extension portion (120), wherein the second extension portion (120) is arranged at an end of the upper insulating member body (101) away from the first extension portion (110), and the second extension portion (120) is sandwiched between the flange (220) and the base plate (300).

6. The single cell according to claim 3, characterized in that: The upper insulating member (100) further comprises a third extension portion (130) connected to the upper insulating member body (101), the third extension portion (130) extending in the radial direction of the pole hole (310), the extension direction of the third extension portion (130) departing from the first extension portion (110), and the third extension portion (130) covering the first surface (3001) of the substrate (300) surrounding the pole hole (310); the top surface (1001) comprises a first sub-top surface (1101) and a second sub-top surface (1301), the surface of the first extension portion (110) on the same side as the first surface (3001) is configured as the first sub-top surface (1101), and the surface of the third extension portion (130) on the same side as the first surface (3001) is configured as the second sub-top surface (1301), Wherein, in the first direction (Z), the distance between the second sub-top surface (1301) and the second surface (3002) is equal to or less than the distance between the first sub-top surface (1101) and the second surface (3002).

7. The single cell according to claim 6, characterized in that: The second sub-top surface (1301) is an inclined surface inclined toward the first surface (3001).

8. The single cell according to claim 6, characterized in that: The third extension portion (130) is provided with a second groove (131), the second groove (131) extends in the radial direction of the pole hole (310), and the notch of the second groove (131) is connected to the outer edge of the third extension portion (130).

9. The single cell according to claim 1, characterized in that: The positioning member (320) comprises: a supporting portion (321) spaced apart from the substrate (300) in the first direction (Z); A clamping portion (322) connecting the supporting portion (321) and the substrate (300); The base plate (300), the clamping portion (322) and the supporting portion (321) are arranged to form an annular clamping groove (3201), and the flange (220) is at least partially accommodated in the clamping groove (3201).

10. The single cell according to claim 1, characterized in that: Also includes: A sealing member (400), comprising a first sealing portion (401) and a second sealing portion (402) connected to each other, wherein the first sealing portion (401) is arranged along the axial direction of the pole (200), the first sealing portion (401) is sandwiched between the positioning member (320) and the flange (220), and the second sealing portion (402) is sandwiched between the substrate (300) and the flange (220); An insulating ring (500) comprises a first insulating portion (501), a second insulating portion (502) and a third insulating portion (503) which are connected to each other; the first insulating portion (501) is arranged radially along the pole (200), and the first insulating portion (501) is clamped between the flange (220) and the positioning member (320); the second insulating portion (502) is connected to an end of the first insulating portion (501) away from the accommodating cavity, the second insulating portion (502) is arranged axially along the pole (200), and the second insulating portion (502) is clamped between the flange (220) and the positioning member (320); the third insulating portion (503) is connected to an end of the first insulating portion (501) close to the accommodating cavity, the third insulating portion (503) is arranged radially along the pole (200), and the third insulating portion (503) is clamped between the pole body (201) and the positioning member (320).

11. An electrical device, characterized in that: It comprises a single cell as claimed in any one of claims 1 to 10.

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