Single battery, battery and electric device

Abstract

The utility model relates to the technical field of batteries, and provides a single battery, a battery and a power utilization device.The single battery comprises a shell, a pole and an injection molding part, the shell is provided with a pole mounting part, the pole mounting part is provided with a pole mounting hole, and the pole at least partially penetrates through the pole mounting hole; a gap is formed between the part, located in the pole mounting hole, of the pole and the pole mounting hole, the side wall of the pole comprises guide planes and an arc-shaped glue collecting area, the guide planes are connected to the two side edges of the arc-shaped glue collecting area in the circumferential direction of the side wall of the pole, and the included angle between the two guide planes connected to the two sides of the arc-shaped glue collecting area is larger than 120 degrees and smaller than or equal to 180 degrees. The injection molding part is arranged around the pole, at least part of the injection molding part is located in the gap so as to connect the pole mounting part and the pole, the injection molding part is provided with a glue collecting face, and the position where the side wall of the pole intersects with the glue collecting face is a glue collecting position which is located in the arc-shaped glue collecting area. According to the scheme, the problem that in the prior art, the structural strength of the glue gathering face position of an injection-molded part is low can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a single battery, a battery and a power utilization device. BACKGROUND

[0002] With the rapid development of the new energy industry, the requirements for battery performance are also increasingly high. The pole is an important component of the battery, and the structural strength of the injection molding part for connecting the pole and the battery shell has an important influence on the stability of the pole, thereby having an important influence on the safety performance of the battery.

[0003] The injection molding part is formed by injection molding. In the process of injection molding the injection molding part, the plastic is injected into the mold, and then the plastic is divided into two streams and flows around the pole in opposite directions, finally contacts and converges to form a complete injection molding part. In the prior art, the flow angles of the two streams of plastic at the convergence position are 90 degrees. When the two streams of plastic converge at 90 degrees, flow in the third direction (different from the flow direction of the two streams of plastic) is generated, and the flow amount is large, resulting in low strength of the glue convergence surface position of the injection molding part, which affects the safety performance of the battery. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a single battery, a battery and a power utilization device to solve the problem of low structural strength of the glue convergence surface position of the injection molding part in the prior art.

[0005] In order to achieve the above purpose, the present application provides the following technical solutions:

[0006] A single battery comprises:

[0007] A housing has a pole mounting portion, and the pole mounting portion is provided with a pole mounting hole;

[0008] A pole is at least partially arranged in the pole mounting hole, and the portion of the pole located in the pole mounting hole has a gap with the pole mounting hole. The side wall of the pole comprises a guide plane and an arc-shaped glue convergence area. Along the circumference of the side wall of the pole, both sides of the arc-shaped glue convergence area are connected with the guide plane. The included angle between the two guide planes connected on both sides of the arc-shaped glue convergence area is greater than 120 degrees and less than or equal to 180 degrees.

[0009] An injection molding part is arranged around the pole and at least partially located in the gap to connect the pole mounting portion and the pole. The injection molding part has a glue convergence surface.

[0010] The position where the side wall of the pole intersects with the glue convergence surface is a glue convergence position, and the glue convergence position is located in the arc-shaped glue convergence area.

[0011] Optionally, the arc-shaped glue collecting area has a first symmetry line parallel to the center line of the pole column, the first symmetry line is located at the glue collecting position, and the two guide planes on both sides of the arc-shaped glue collecting area are symmetric about the first symmetry line.

[0012] Optionally, the injection molding part has an injection mark, the injection mark of the injection molding part is located at an injection position, and a side wall of the pole column corresponds to a plastic starting flow position at the injection position.

[0013] The pole column is a symmetrical structure, and the plastic starting flow position and the glue collecting position are located on the symmetry plane of the pole column.

[0014] Optionally, the number of injection marks is one, and the center of the injection mark is located on the plane where the glue collecting surface is located.

[0015] Optionally, the guide plane is smoothly connected with the arc-shaped glue collecting area.

[0016] Optionally, the side wall of the pole column is provided with at least two recessed portions, any two adjacent recessed portions have an arc-shaped area therebetween, the inner wall of the injection molding part has a protruding portion and an arc-shaped portion, the protruding portion is located in the recessed portion and is adapted to the recessed portion, and the arc-shaped portion is connected with the arc-shaped area in a fit manner.

[0017] The bottom surface of the recessed portion in the recessed direction is a plane, the bottom surfaces of the at least two recessed portions form the guide plane, and the at least one arc-shaped area forms the arc-shaped glue collecting area.

[0018] Optionally, the number of recessed portions is six, and the recessed portions are uniformly distributed along the circumference of the side wall of the pole column.

[0019] The plane where the glue collecting surface is located has three recessed portions on each side, and the three recessed portions on one side of the plane where the glue collecting surface is located are symmetrically distributed with the three recessed portions on the other side of the plane where the glue collecting surface is located.

[0020] Optionally, in the direction of the center line of the pole column, the height of the recessed portion is greater than 0.3mm.

[0021] Optionally, in the recessed direction of the recessed portion, the depth of the recessed portion is 0.5mm-3mm.

[0022] Optionally, the pole column comprises a first portion and a second portion distributed in the direction of the center line, the cross-sectional area of the first portion is smaller than that of the second portion, the first portion passes through the pole column mounting hole, the recessed portion is arranged on the side wall of the second portion, and the injection molding part surrounds the first portion.

[0023] The pole mounting portion comprises a mounting area surrounding the pole mounting hole, and the edge of the second part is opposite to the mounting area, and the side wall of the first part is further sleeved with a sealing ring, and the two opposite surfaces of the sealing ring abut against the mounting area and the second part respectively.

[0024] Optionally, the minimum distance between the recess and the second part in the direction of the center line of the pole is a first distance, and the first distance is greater than the thickness of the sealing ring.

[0025] Optionally, the pole comprises a first part and a second part which are sequentially distributed in the axial direction and gradually increase in cross-sectional area, and at least part of the first part is arranged in the pole mounting hole, and the part in the pole mounting hole has a gap between the pole mounting hole;

[0026] The side wall of the second part of the pole has a plurality of recesses recessed radially inward, and the plurality of recesses are uniformly distributed in the circumferential direction, and any two adjacent recesses have an arc-shaped area therebetween.

[0027] The bottom surface of the recess in the recess direction is a plane, wherein the bottom surfaces of two recesses form the guide plane, and the arc-shaped area between the two guide planes forms the arc-shaped glue collecting area.

[0028] The injection molding part surrounds the first part, and the inner wall of the injection molding part has convex parts and arc-shaped parts alternately distributed in the circumferential direction, the convex parts are located in the recesses and are adapted to the recesses, and the arc-shaped parts are connected to the arc-shaped areas in a fit manner.

[0029] The injection molding part extends to the surface of the pole mounting portion to form a square column structure, the injection molding part has four corners, and the injection molding part has a glue injection mark, and the glue injection mark is located at one of the corners.

[0030] The center of the glue injection mark, the axis of the injection molding part, the axis of the pole, and one of the symmetric lines of the arc-shaped glue collecting area are all located in the plane where the glue collecting surface is located.

[0031] The pole mounting portion comprises a mounting area surrounding the pole mounting hole, and the edge of the second part is opposite to the mounting area, and the side wall of the first part is further sleeved with a sealing ring, and the two opposite surfaces of the sealing ring abut against the mounting area and the second part respectively, and in the axial direction of the pole, the minimum distance between the recess and the second part is a first distance, and the first distance is greater than the thickness of the sealing ring.

[0032] Optionally, the injection molding member extends to the surface of the pole mounting portion to form a square column structure, and the injection molding member has an annular inner wall surrounding the pole;

[0033] The injection molding member has a plurality of corners, and the injection molding member has a glue injection mark located at the corner.

[0034] A battery comprising the single battery described above.

[0035] An electrical device comprising the single battery described above or the battery described above.

[0036] In the embodiment of the present application, the side wall of the pole has a guiding effect on the flow of plastic during the injection molding process, and the glue collecting position of the pole is located in the arc-shaped glue collecting area. Therefore, during the two plastic glue collecting processes, the included angle between the flow directions of the two plastic glues in the arc-shaped glue collecting area is obtuse, and finally tends to be parallel, so that the plastic flow amount in the third direction generated when the two plastic glues collect at the glue collecting position is reduced compared with 90 degrees, thereby improving the structural strength of the glue collecting surface of the injection molding member. Therefore, the present application can solve the problem of low structural strength of the glue collecting surface position of the injection molding member in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0038] Figure 1 An exploded view of part of the single battery provided in the embodiment of the present application;

[0039] Figure 2 A structural schematic view of the injection molding member provided in the embodiment of the present application;

[0040] Figure 3 A top view of the injection molding member provided in the embodiment of the present application;

[0041] Figure 4 A front view of the injection molding member provided in the embodiment of the present application;

[0042] Figure 5 A structural schematic view of the pole provided in the embodiment of the present application;

[0043] Figure 6 A top view of the pole provided in the embodiment of the present application;

[0044] Figure 7 A front view of the pole provided in the embodiment of the present application;

[0045] Figure 8 An assembly schematic view of the pole post mounting portion, the pole post and the injection molding piece provided by the embodiment of the present application is shown in FIG. 1.

[0046] Figure 9 A sectional view in the A-A direction of FIG. 1 is shown in FIG. 2. Figure 8

[0047] Figure 10 An enlarged view of C in FIG. 1 is shown in FIG. 3. Figure 9

[0048] Figure 11 A sectional view in the B-B direction of FIG. 1 is shown in FIG. 4. Figure 8 In FIG. 1:

[0049] Figures 1-11 In FIG. 1:

[0050] 100, pole post mounting portion; 110, pole post mounting hole; 120, explosion-proof valve mounting hole; 130, liquid injection hole;

[0051] 200, pole post; 210, first portion; 211, recessed portion; 2111, guide plane; 212, arc-shaped glue pooling area; 220, second portion; 230, third portion;

[0052] 300, injection molding piece; 310, glue pooling surface; 320, glue injection mark; 330, protruding portion; 340, arc-shaped portion;

[0053] 400, lower plastic piece; 410, first through hole;

[0054] 500, sealing ring;

[0055] 610, explosion-proof valve; 620, protective sheet. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0057] As shown in FIG. 1, the embodiment of the present application provides a single battery, which can be a secondary battery, of course, can also be a disposable battery. The single battery can be a lithium ion battery, of course, can also be a sodium ion battery, a magnesium ion battery. The single battery includes a shell, a pole post 200, and an injection molding piece 300. Figures 1-11

[0058] ​​​​The shell has a pole mounting portion 100, and the pole mounting portion 100 is provided with a pole mounting hole 110. Optionally, the shell can include a shell body and a cover plate, the shell body is provided with an opening, the cover plate is connected with the shell body and seals the opening, the pole mounting portion 100 can be a part of the cover plate or the shell body, or the pole mounting portion 100 can also be a component part other than the cover plate and the shell body and is mounted on the cover plate or the shell body.

[0059] At least part of the pole 200 is arranged in the pole mounting hole 110, and a gap is formed between the part of the pole 200 located in the pole mounting hole 110 and the hole wall of the pole mounting hole 110. The number of poles 200 can be two, which form a positive pole and a negative pole respectively.

[0060] The side wall of the pole 200 includes a guide plane 2111 and an arc-shaped glue collecting area 212, the arc-shaped glue collecting area 212 can be a circular arc surface, and two guide planes 2111 are connected on both sides of the arc-shaped glue collecting area 212 along the circumference of the side wall of the pole 200, and the included angle α between the two guide planes 2111 connected on both sides of the arc-shaped glue collecting area 212 is greater than 120 degrees and less than or equal to 180 degrees.

[0061] The injection molding part 300 is arranged around the pole 200 and at least partially located in the gap to connect the pole mounting portion 100 and the pole 200, the number of injection molding parts 300 is the same as that of the poles 200 and is connected one by one with the poles 200. It should be noted that the injection molding part 300 can be made of insulating material, so that the pole mounting portion 100 and the pole 200 are insulated from each other. In other embodiments, one injection molding part 300 can be made of insulating material, and the other injection molding part 300 can be made of conductive material, so that one of the two poles 200 and the pole mounting portion 100 are insulated from each other, and the other is conductive. Here, no limitation is made.

[0062] The injection molding part 300 is formed by injection molding. In a specific injection molding process, a mold is placed on the pole mounting portion 100 around the pole 200, the mold has a glue injection port, and plastic is injected into the mold through the glue injection port. The plastic enters the space surrounded by the pole 200, the pole mounting portion 100 and the mold from the glue injection port position, part of which flows into the gap to fill the gap, and the plastic flows in two opposite directions around the side wall of the pole 200, until the two plastic flows in opposite directions contact and form a glue collecting surface 310. Therefore, the inner wall of the injection molding part 300 is attached to the side wall of the pole 200, and the structure shape is completely the same. The part of the injection molding part 300 located in the gap can play a role in connecting the pole 200 and the pole mounting portion 100. In this embodiment, the injection molding part 300 is made of insulating material to play a role in electrically isolating the pole 200 and the pole mounting portion 100.

[0063] It should be noted that the dashed line segment for representing the glue surface 310 in the drawings of the present application is not a line actually existing on the injection molded part 300, but is a schematic line drawn for the convenience of understanding the present application. After injection molding, the position of the glue surface 310 of the injection molded part 300 can form a fusion line. If a fusion line is formed, the dashed line segment for representing the glue surface 310 in the drawings can also refer to the fusion line actually existing on the injection molded part 300, and the fusion line can be a straight line as shown in the drawings or a curved line.

[0064] The position where the side wall of the pole 200 intersects with the glue surface 310 is a glue position, and the glue position is located in the arc-shaped glue area 212. In addition, it should be noted that the side wall of the pole 200 intersects with the glue surface 310 on a straight line, and the straight line is parallel to the straight line formed by the intersection of the two guide planes 2111.

[0065] In the embodiment of the present application, the side wall of the pole 200 has a guiding effect on the flow of plastic during injection molding, and the glue position of the pole 200 is located in the arc-shaped glue area 212. During the glue of the two streams of plastic, the included angle between the flow directions of the two streams of plastic in the arc-shaped glue area 212 is obtuse, and gradually tends to be parallel, so that the plastic flow amount in the third direction generated when the two streams of plastic glue at the glue position is reduced compared to 90 degrees, thereby improving the structural strength of the glue surface 310 of the injection molded part 300. As can be seen, the present application can solve the problem of low structural strength of the glue surface position of the injection molded part in the prior art.

[0066] In addition, the included angle between the flow directions of the two streams of plastic when flowing in the arc-shaped glue area 212 is obtuse and gradually tends to be parallel, the included angle α between the two guide planes 2111 connected on both sides of the arc-shaped glue area 212 is 120 degrees to 180 degrees, and the greater the included angle, the smaller the pressure required for the two streams of plastic to flow from the two guide planes 2111 to the arc-shaped glue area 212. Therefore, the embodiment of the present application helps to reduce the requirement for injection pressure during injection molding.

[0067] Optionally, the included angle α between the two guide planes 2111 located on both sides of the arc-shaped glue area 212 can be 130 degrees, 150 degrees, or 180 degrees.

[0068] In a further technical solution, the arc-shaped glue area 212 can have a first symmetry line parallel to the center line of the pole 200, the first symmetry line is located at the glue position, and the two guide planes 2111 connected on both sides of the arc-shaped glue area 212 are symmetric about the first symmetry line. In this case, during injection molding, the two streams of plastic meet in the middle of the arc-shaped glue area 212, and after flowing to the guide planes 2111 and the area where the arc-shaped glue area 212 is located, the flow paths of the two streams of plastic are the same, which reduces the state difference when the two streams of plastic meet and improves the structural strength of the glue surface 310.

[0069] It should be noted that the pole 200 can include a cylindrical structure, can include a square column structure, can include a cylindrical structure and / or a square column structure with different diameters (or cross-sectional areas) in the axial distribution, and can also be a circular truncated cone structure. In the case where the pole 200 includes a cylindrical structure, the center line of the pole 200 is the axis. Of course, in other embodiments, the pole 200 can also adopt other shapes, which are not limited herein.

[0070] A mold is needed in the injection molding process, and the mold has a glue injection port. After the mold is removed after the injection molding is completed, the surface of the injection molded part 300 will form a glue injection mark 320 corresponding to the position of the glue injection port. The position of the glue injection mark 320 of the injection molded part 300 is the glue injection position, and the position corresponding to the glue injection position of the side wall of the pole 200 is the plastic starting flow position. It should be noted that the position corresponding to the glue injection position of the side wall of the pole 200 can be the position where the plane formed between the straight line where the center of the glue injection mark 320 is located and the center line of the pole 200 intersects with the side wall of the pole 200.

[0071] The pole 200 can be a symmetrical structure, and the plastic starting flow position and the glue collecting position are both located on the symmetry plane of the pole 200. In this structure, the flow paths of the two streams of plastic that converge at the glue collecting position are completely consistent, further reducing the state difference when the two streams of plastic converge, and further improving the structural strength of the glue collecting surface 310.

[0072] The injection molded part 300 can have one or more glue injection marks 320, that is, the mold has one or more glue injection ports, and the number of glue injection marks 320 on the injection molded part 300 is consistent with the number of glue injection ports on the mold.

[0073] In a preferred embodiment, the number of glue injection marks 320 is one, the center of the glue injection mark 320 is located on the plane where the glue collecting surface 310 is located, and the center of the glue injection mark 320 is also located in the plane formed by the first symmetry line of the arc-shaped glue collecting area 212 and the center line of the pole 200. In this case, there is only one glue injection port during the injection molding process, and the plastic injected through the one glue injection port is divided into two streams flowing around the pole 200. In this way, the injection molded part 300 has only one glue collecting surface 310, reducing the number of weak strength positions of the injection molded part 300 and improving the structural strength of the injection molded part 300.

[0074] During the injection molding process, the plastic flows around the pole 200. In order to improve the smoothness of the plastic flow, the guide plane 2111 and the arc-shaped glue collecting area 212 can be smoothly connected along the circumference of the side wall of the pole 200. In this structure, the relatively sharp corners in the plastic flow process can be reduced, the smoothness of the flow can be improved, and the smooth completion of the injection molding process can be ensured.

[0075] In the embodiment of the present application, the side wall of the pole 200 is provided with at least two recesses 211, and any two adjacent recesses 211 have an arc-shaped area. The inner wall of the injection molding part 300 is provided with a protruding part 330 and an arc-shaped part 340. The protruding part 330 extends into the recess 211 and is matched with the recess 211. The arc-shaped part 340 is connected to the arc-shaped area in a matched manner. The bottom surface of the recess 211 in the recess direction is a plane. The bottom surfaces of the at least two recesses 211 form a guide plane 2111. The arc-shaped area between the two recesses 211 forming the guide plane 2111 forms an arc-shaped glue collecting area 212. At least one arc-shaped area forms the arc-shaped glue collecting area 212.

[0076] In this case, the matching of the protruding part 330 and the recess 211 enables the pole 200 and the injection molding part 300 to be limited and matched in the center line direction, thereby improving the connection strength, position stability and electrical isolation effectiveness of the pole 200 and the injection molding part 300.

[0077] Since the injection molding part 300 is formed by injection molding around the pole 200, the shape of the inner wall of the injection molding part 300 is matched with the shape of the side wall of the pole 200. The shape of the protruding part 330 of the inner wall of the injection molding part 300 is matched with the shape of the recess 211. The protruding part 330 has a plane structure matched with the guide plane 2111. The included angle β between the plane structures of the two protruding parts 330 on both sides of the glue collecting surface 310 is the same as the included angle α between the two guide planes 2111. β is greater than 120 degrees and less than or equal to 180 degrees.

[0078] The structure of the recess 211 can be various. In an alternative embodiment, please refer to Figure 5 The recess 211 can be a groove structure. In the center line direction of the pole 200, there are two groove walls arranged oppositely (in this structure, the recess 211 is distributed on the side wall of the first part 210 of the pole 200). In another alternative embodiment, the recess 211 can extend from one side surface of the pole 200 to the middle part of the pole 200 in the center line direction of the pole 200 (specifically, the recess 211 can extend from the surface of the third part 230 away from the first part 210 to the middle part of the first part 210. The recess 211 is distributed on the first part 210 and the third part 230 of the pole 200).

[0079] In the embodiment of the present application, the number of recesses 211 is multiple, for example, six, eight, etc. The multiple recesses 211 are uniformly distributed along the circumference of the side wall of the pole 200. The number of recesses 211 can be N, and the central angle of each recess 211 is less than (360 / N).

[0080] The height of the recessed portion 211 can be greater than 0.3 mm in the direction of the center line of the pole column 200, for example, 0.35 mm, 0.4 mm, 0.45 mm. The depth of the recessed portion 211 can be 0.5-3 mm in the recessed direction of the recessed portion 211, for example, 0.5 mm, 1 mm, 2 mm, 3 mm.

[0081] The injection molding part 300 includes a connecting portion and an extending portion. The connecting portion is annular, the inner side wall of the connecting portion is in contact with the side wall of the pole column 200, and the outer side wall of the connecting portion is in contact with the hole wall of the pole column mounting hole 110. The extending portion is connected with the outer side wall of the connecting portion and is at least partially located on the side of the pole column mounting portion 100 away from the battery cell assembly. The outer shape of the extending portion is square, the square has multiple corners (four in this embodiment), and the injection mark 320 is located at the corner position. Optionally, the corners can have a circular arc chamfer. In comparison, the area of the corner position is larger, so the injection port of the mold is also located at the corner position with a larger area during the injection molding process, facilitating the injection of the plastic.

[0082] In the embodiment of the present application, the pole column 200 can include a first portion 210 and a second portion 220 distributed in the direction of the center line, the cross-sectional area of the first portion 210 is smaller than that of the second portion 220 (the cross-sectional area of the first portion 210 and the second portion 220 refers to the area of the section perpendicular to the center line of the pole column 200), the first portion 210 passes through the pole column mounting hole 110, the recessed portion 211 is arranged on the side wall outside the second portion 220, and the injection molding part 300 surrounds the first portion 210.

[0083] The pole column mounting portion 100 includes a mounting area surrounding the pole column mounting hole 110, the edge of the second portion 220 is opposite to the mounting area, the side wall of the first portion 210 is further sleeved with a sealing ring 500, and the two opposite surfaces of the sealing ring 500 are respectively in abutment with the mounting area and the second portion 220.

[0084] In this case, the sealing ring 500 can seal the pole column mounting hole 110, which can prevent the internal electrolyte of the monomer battery from leaking on one hand, and on the other hand, can also enable the plastic to better fill the gap between the pole column mounting portion 100 and the first portion 210 during the injection molding process, thereby ensuring the connection stability between the injection molding part 300, the pole column 200 and the pole column mounting portion 100.

[0085] In the above scheme, the adjacent two recessed portions 211 have an arc-shaped area, which can prevent the sealing ring 500 from being embedded into the recessed portion 211.

[0086] The minimum distance between the recess 211 and the second part 220 along the center line direction of the pole 200 can be a first distance, and the first distance can be greater than the thickness of the sealing ring 500, so as to prevent the sealing ring 500 from covering the recess 211, and to prevent the plastic from flowing into the recess 211 during the injection molding process, thereby affecting the connection stability between the injection molded part 300 and the pole 200. It should be noted that the thickness of the sealing ring 500 here refers to the thickness of the sealing ring 500 after compression, that is, the thickness of the sealing ring 500 after assembly. The thickness of the sealing ring 500 in the uncompressed state, that is, the free state, can be greater than the first distance.

[0087] The single battery can further include a lower plastic part 400, the lower plastic part 400 is connected in a stacked manner with the pole mounting part 100, the lower plastic part 400 is provided with a first through hole 410, the first part 210 passes through the first through hole 410 and the pole mounting hole 110, and the second part 220 is located on the side of the lower plastic part 400 away from the pole mounting part 100. Part of the sealing ring 500 can be located in the first through hole 410, and the area of the lower plastic part 400 surrounding the first through hole 410 is located between the mounting area of the pole mounting part 100 and the second part 220, so as to connect and electrically isolate the second part 220 and the pole mounting part 100.

[0088] The single battery can further include an explosion-proof valve 610 and a protective sheet 620. When thermal runaway occurs in the single battery, the explosion-proof valve 610 is blown to release pressure, and the protective sheet 620 can protect the explosion-proof valve sheet to prevent external impurities from affecting the explosion-proof value of the explosion-proof valve. The pole mounting part 100 is provided with an explosion-proof valve mounting hole 120, and the explosion-proof valve 610 and the protective sheet 620 are mounted in the explosion-proof valve mounting hole 120, and the protective sheet 620 covers the explosion-proof valve 610.

[0089] The pole mounting part 100 is provided with a liquid injection hole 130, and the liquid injection hole 130 is used to inject electrolyte. The single battery further includes a sealing pin, and the liquid injection hole 130 is sealed by the sealing pin. The sealing pin includes a sealing aluminum pin and a sealing rubber pin. The sealing aluminum pin is welded to the pole mounting part 100, and the sealing rubber pin is detachably connected with the liquid injection hole 130. When the two are connected, the liquid injection hole 130 is blocked.

[0090] In the single battery of the embodiment of the present application, the pole 200 includes a third part 230, a first part 210 and a second part 220 which are sequentially distributed along the axial direction and have cross-sectional areas gradually increasing. At least part of the first part 210 is arranged in the pole mounting hole 110, and the part located in the pole mounting hole 110 has a gap between the pole mounting hole 110.

[0091] The side wall of the second part 220 of the pole 200 has a plurality of (for example, six) radially inwardly recessed recesses 211, the six recesses 211 are uniformly distributed in the circumferential direction, and each of any two adjacent recesses 211 has an arc-shaped area. The plane where the glue collecting surface 310 is located has three recesses 211 on each side, and the three recesses 211 on one side of the plane where the glue collecting surface 310 is located are symmetrically distributed with the three recesses 211 on the other side of the plane where the glue collecting surface 310 is located.

[0092] The bottom surface of the recess 211 in the recess direction is a plane, wherein the bottom surfaces of two recesses 211 form guide planes 2111, and the arc-shaped area between the two guide planes 2111 forms an arc-shaped glue collecting area 212, and the guide planes 2111 and the arc-shaped glue collecting area 212 are smoothly connected.

[0093] In the axial direction of the pole 200, the height of the recess 211 is greater than 0.3 mm, and the minimum distance from the recess 211 to the surface of the third part 230 away from the first part 210 is greater than 0.3 mm; in the recess direction of the recess 211, the depth of the recess 211 is 0.5 mm-3 mm; in the radial direction of the pole 200, the distance between the side wall of the third part 230 and the side wall of the first part 210 is greater than 0.2 mm, which can be 0.25 mm, 0.3 mm, and the height of the third part 230 in the axial direction is greater than 0.1 mm, which can be 0.15 mm, 0.2 mm.

[0094] The injection molding part 300 is distributed around the first part 210, and the inner wall of the injection molding part 300 has convex portions 330 and arc-shaped portions 340 alternately distributed in the circumferential direction, the convex portions 330 extend into the recesses 211 and are adapted to the recesses 211, and the arc-shaped portions 340 are connected to the arc-shaped areas.

[0095] The injection molding part 300 extends to the surface of the pole mounting part 100, forming a square column structure, the injection molding part 300 has four corners, and the injection molding part 300 has a glue injection mark 320, which is located at one of the corners.

[0096] The center of the glue injection mark 320, the axis of the injection molding part 300, the axis of the pole 200, and one of the symmetric lines of the arc-shaped glue collecting area 212 are located in the plane where the glue collecting surface 310 is located. The six recesses 211 are divided into two groups, each group including three, and the two groups of recesses 211 are symmetrically distributed about the plane where the glue collecting surface 310 is located.

[0097] The pole mounting portion 100 includes a mounting area surrounding the pole mounting hole 110, and the edge of the second portion 220 is opposite to the mounting area. The side wall of the first portion 210 is further sleeved with a sealing ring 500, and the opposite two surfaces of the sealing ring 500 abut against the mounting area and the second portion 220, respectively. In the axial direction of the pole 200, the minimum distance between the recessed portion 211 and the second portion 220 is a first distance, and the first distance is greater than the thickness of the sealing ring 500.

[0098] Based on the above-mentioned single battery, the embodiments of the present application further provide a battery, which comprises the above-mentioned single battery. Since the battery has the above-mentioned single battery, the beneficial effects of the battery brought by the single battery are described above, and will not be repeated here.

[0099] The battery refers to a single physical module comprising one or more single batteries to provide higher voltage and capacity.

[0100] In some optional embodiments, the battery can be a battery module, and in the case of multiple batteries, the multiple batteries are arranged and fixed to form a battery module.

[0101] In some optional embodiments, the battery can be a battery pack, and the battery pack comprises a box body and a battery, and the battery or the battery module is contained in the box body.

[0102] In some optional embodiments, the box body can be part of the chassis structure of the vehicle. For example, part of the box body can be at least part of the floor of the vehicle, or part of the box body can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0103] In some optional embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0104] Based on the above-mentioned single battery or battery, the embodiments of the present application further provide an electric device, which comprises the above-mentioned single battery or the above-mentioned battery. Since the electric device has the above-mentioned single battery or battery, the beneficial effects of the electric device brought by the single battery or battery are described above, and will not be repeated here.

[0105] The basic principles of the present application are described above in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects, etc. mentioned in the present application are only examples and are not limited, and these advantages, advantages, effects, etc. cannot be considered as the must-have of each embodiment of the present application. In addition, the above-mentioned specific details are only for the purpose of example and for the purpose of understanding, and are not limited to the above-mentioned specific details, and the above-mentioned details do not limit the present application to the above-mentioned specific details.

[0106] The block diagrams of the devices, apparatuses, equipment, systems involved in the present application are only illustrative examples and are not intended to require or imply that the connection, arrangement, configuration must be as shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have", and the like are open-ended words, mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably, unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0107] It should also be noted that in the devices, apparatuses and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present application.

[0108] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the present application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0109] It should be understood that the adjectives "first", "second", "third", "fourth", "fifth" and "sixth" used in the embodiments of the present application are only used for more clearly describing the technical solutions, and cannot be used to limit the protection scope of the present application.

[0110] The above description has been given for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A single cell, characterized by, The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly.

2. The cell according to claim 1, wherein The application relates to a polar post assembly.

3. The cell according to claim 1, wherein The application relates to a polar post assembly. The application relates to a polar post assembly.

4. The cell according to claim 3, wherein The application relates to a polar post assembly.

5. The cell according to claim 1, wherein The application relates to a polar post assembly.

6. The single cell according to any one of claims 1 to 5, characterized by The application relates to a polar post assembly. The application relates to a polar post assembly.

7. The cell according to claim 6, wherein The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. The application relates to a polar post assembly. 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The application relates to a The plane where the glue collecting surface (310) is located has three recesses (211) on each side, and the three recesses (211) on one side of the plane where the glue collecting surface (310) is located are symmetrically distributed with the three recesses (211) on the other side of the plane where the glue collecting surface (310) is located.

8. The cell according to claim 6, wherein The height of the recess (211) is greater than 0.3mm along the direction of the center line of the pole (200).

9. The cell according to claim 6, wherein The depth of the recess (211) is 0.5mm-3mm along the recess direction of the recess (211).

10. The cell according to claim 6, wherein The pole (200) comprises a first part (210) and a second part (220) distributed along the center line direction, the cross-sectional area of the first part (210) is smaller than that of the second part (220), the first part (210) passes through the pole mounting hole (110), the recess (211) is arranged on the side wall outside the second part (220), and the injection molding part (300) is arranged around the first part (210). The pole mounting part (100) comprises a mounting area around the pole mounting hole (110), the edge of the second part (220) is opposite to the mounting area, the side wall of the first part (210) is further sleeved with a sealing ring (500), and the opposite two surfaces of the sealing ring (500) abut against the mounting area and the second part (220) respectively.

11. The cell according to claim 10, wherein The minimum distance between the recess (211) and the second part (220) is a first distance along the center line direction of the pole (200), and the first distance is greater than the thickness of the sealing ring (500).

12. The cell of claim 1 wherein, The pole (200) comprises a first part (210) and a second part (220) sequentially distributed along the axial direction and gradually increasing in cross-sectional area, at least part of the first part (210) passes through the pole mounting hole (110), and the part located in the pole mounting hole (110) has a gap between the pole mounting hole (110). The side wall outside the second part (220) of the pole (200) has a plurality of recesses (211) recessed radially inward, the plurality of recesses (211) are uniformly distributed along the circumferential direction, and each of any two adjacent recesses (211) has an arc-shaped area. The bottom surface of the recess (211) in the recess direction is a plane, and the bottom surfaces of two recesses (211) form the guide plane (2111), and the arc-shaped area between the two guide planes (2111) forms the arc-shaped glue collecting area (212). The injection molding part (300) is distributed around the first part (210), the inner wall of the injection molding part (300) has a convex part (330) and an arc-shaped part (340) alternately distributed along the circumferential direction, the convex part (330) is located in the recess (211) and is matched with the recess (211), and the arc-shaped part (340) is connected with the arc-shaped area in a matched mode. The injection molding part (300) extends to the surface of the pole mounting part (100) to form a square column structure, the injection molding part (300) has four corners, the injection molding part (300) has a glue injection mark (320), and the glue injection mark (320) is located at one of the corners; The center of the glue injection mark (320), the axis of the injection molding part (300), the axis of the pole (200), and one of the symmetric lines of the arc-shaped glue collecting area (212) are located on the plane where the glue collecting surface (310) is located; The pole mounting part (100) includes a mounting area around the pole mounting hole (110), the edge of the second part (220) is opposite to the mounting area, the side wall of the first part (210) is further sleeved with a sealing ring (500), the opposite two surfaces of the sealing ring (500) are respectively abutted against the mounting area and the second part (220), and the minimum distance between the recess (211) and the second part (220) in the axial direction of the pole (200) is a first distance, and the first distance is greater than the thickness of the sealing ring (500).

13. The cell of claim 1 wherein, The injection molding part (300) extends to the surface of the pole mounting part (100) to form a square column structure, the injection molding part (300) has a circular inner wall around the pole (200); The injection molding part (300) has a plurality of corners, the injection molding part (300) has a glue injection mark (320), and the glue injection mark (320) is located at the corner.

14. A battery, characterized by A single battery as claimed in any one of claims 1 to 13.

15. An electrical device, comprising: A battery as claimed in claim 14, comprising a single battery as claimed in any one of claims 1 to 13.

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