Battery and electronic equipment

Abstract

The utility model provides a battery and electronic equipment. The battery comprises a shell and a sealing element, the shell comprises a containing cavity and a liquid injection hole, and the liquid injection hole communicates with the containing cavity and is used for injecting electrolyte into the containing cavity; the sealing piece is at least partially arranged in the liquid injection hole, and the end, away from the containing cavity, of the sealing piece is arranged in the liquid injection hole in a sinking mode and fixedly welded to the inner wall of the liquid injection hole so that sealing can be achieved. According to the utility model, the end, far away from the accommodating cavity, of the sealing element is sunk in the liquid injection hole, so that the welding surplus height formed by welding the sealing element and the inner wall of the liquid injection hole can be reduced, and even a welding pool formed by welding the sealing element and the inner wall of the liquid injection hole can also be sunk in the liquid injection hole, and the surplus height is completely eliminated; the technical problem that a welding pool at a liquid injection hole protrudes out of the outer surface of a shell too much is solved.

Description

Technical Field

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

[0002] Batteries are power sources that provide power for electronics. For example, electronic devices may include battery-powered game controllers, household appliances, medical devices, and transportation vehicles.

[0003] In the related art, the battery shell is provided with a liquid injection hole for injecting electrolyte into the shell. After the electrolyte injection is completed, a sealing pin needs to be welded to close the liquid injection hole. However, the welding of the sealing pin will cause a higher welding pool to protrude from the shell surface, thereby affecting the subsequent assembly of the battery.

[0004] Therefore, the prior art needs to be improved and enhanced. Utility Model Content

[0005] The embodiments of the utility model provide a battery and an electronic device, which can improve the technical problem that the welding molten pool at the injection hole protrudes too high from the shell surface, that is, the so-called welding excess height problem.

[0006] In a first aspect, an embodiment of the present utility model provides a battery, comprising:

[0007] a housing, the housing comprising a receiving cavity and a liquid injection hole, the liquid injection hole being in communication with the receiving cavity for injecting electrolyte into the receiving cavity; and

[0008] A sealing member is at least partially disposed in the liquid injection hole, and one end of the sealing member away from the accommodating cavity is sunk in the liquid injection hole and is welded and fixed to the inner wall of the liquid injection hole.

[0009] In one embodiment, the outer surface of the shell includes a first orifice end surface forming an opening of the injection hole, and the sealing member includes a first end surface facing away from the accommodating cavity, and the first end surface is located on a side of the first orifice end surface close to the accommodating cavity;

[0010] Wherein, along the depth direction of the injection hole, the distance between the first hole end face and the first end face is less than or equal to 0.1 mm.

[0011] In one embodiment, the injection hole includes a first section and a second section connected to each other, the second section is located on a side of the first section close to the accommodating cavity, and the inner diameter of the second section is smaller than the inner diameter of the first section;

[0012] The sealing member comprises an integrally formed welding section and a blocking section, wherein the welding section is welded and fixed in the first section, and the blocking section is arranged in the second section to block the liquid injection hole.

[0013] In one embodiment, the blocking section includes a second end surface facing the accommodating cavity, and the second end surface is an end surface of the sealing member facing the accommodating cavity;

[0014] The inner surface of the shell includes a second orifice end face forming the opening of the injection hole, and the second end face is located on the side of the second orifice end face away from the accommodating cavity, so that the sealing member is sunk into the injection hole with one end face facing the accommodating cavity.

[0015] In one embodiment, the occluding segment is inserted into the second segment to a depth greater than or equal to 0.2 mm; and / or

[0016] The ratio of the depth of the plugging section inserted into the second section to the total depth of the injection hole is 0.2 to 0.9.

[0017] In one embodiment, the inner wall of the shell includes a first inner wall arranged around the injection hole, the first inner wall is provided with a boss, and part of the injection hole is formed on the boss, so that the end surface of the boss away from the first inner wall forms the second hole end surface;

[0018] Wherein, the blocking section is at least partially located in the boss.

[0019] In one embodiment, the battery further includes a busbar, and the injection hole is arranged opposite to the busbar.

[0020] In one embodiment, the inner wall of the injection hole comprises a first annular wall arranged around the welding section, and the first annular wall is arranged to be inclined inward at one end close to the second section; and / or

[0021] The inner wall of the injection hole comprises a step surface connecting the first section and the second section, and a first chamfer is provided at the connection between the step surface and the second section; and / or

[0022] A second chamfer is provided at one end of the blocking section away from the welding section.

[0023] In one embodiment, the sealing member forms a welding section at one end away from the accommodating cavity, and the outer peripheral side of the welding section is welded and sealed with the inner wall of the injection hole; wherein,

[0024] The distance between the outer circumference of the welding section and the inner wall of the injection hole is 0.05 to 0.25 mm; and / or

[0025] The welding section is provided with a first groove, and the notch of the first groove is located at a side of the welding section away from the accommodating cavity.

[0026] In one embodiment, when the welding section is provided with a first groove, the welding section further includes a second groove, the second groove is provided on the groove bottom wall of the first groove, and the second groove is provided around the outer end edge of the groove bottom wall of the first groove.

[0027] In a second aspect, an embodiment of the present utility model further provides an electronic device, comprising a battery as described in any one of the above items.

[0028] Beneficial effects of the embodiments of the utility model:

[0029] In an embodiment of the utility model, by sinking one end of the sealing member away from the accommodating cavity in the injection hole, the height (residual height) of the welding pool formed by welding between the sealing member and the inner wall of the injection hole protruding from the outer surface of the shell can be reduced, and even the welding pool formed by welding between the sealing member and the inner wall of the injection hole can also be sunk in the injection hole, so as to improve the technical problem that the welding pool at the injection hole protrudes too high from the outer surface of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a partial structural schematic diagram of a battery provided in an embodiment of the utility model.

[0032] Figure 2 for Figure 1 Exploded view of the battery housing and seal.

[0033] Figure 3 for Figure 1 Schematic diagram of the structure of the seal and busbar of the battery shown.

[0034] Figure 4 for Figure 1 Schematic diagram of the structure of the second seal of the battery shown.

[0035] Figure 5 for Figure 1 Schematic diagram of the structure of the third type of seal of the battery shown.

[0036] Figure 6 A schematic structural diagram of a battery provided in an embodiment of the utility model.

[0037] The numbers in the figure are:

[0038] 100, housing; 100a, main housing; 100b, end cover;

[0039] 11. accommodating cavity; 12. injection hole; 121. first section; 122. second section; 13. first orifice end surface; 14. boss; 141. second orifice end surface; 15. first inner wall; 16. first annular wall; 17. step surface; 171. first chamfer;

[0040] 200, seals;

[0041] 21, welding section; 211, first end face; 212, first groove; 213, second groove; 214, bottom face; 215, annular face; 22, blocking section; 221, second end face; 222, second chamfer;

[0042] 300, busbar;

[0043] 400, pole;

[0044] L1, the distance between the first orifice end face and the first end face; L2, the depth of the plugging section inserted into the second section; L3, the total depth of the injection hole; L4, the distance between the outer peripheral side of the welding section and the inner wall of the injection hole. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0046] In addition, the "plurality" in the embodiments of the present application refers to two or more than two. In view of this, in the embodiments of the present application, "plurality" can also be understood as "at least two". "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and there is no limit on which ones are included. For example, including at least one of A, B and C, then A, B, C, A and B, A and C, B and C, or A, B and C can be included.

[0047] It should be noted that, in the embodiments of the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0048] Batteries are power sources that provide power for electronics. For example, electronic devices may include battery-powered game controllers, household appliances, medical devices, and transportation vehicles.

[0049] In the related art, the battery shell is provided with a liquid injection hole for injecting electrolyte into the shell. After the electrolyte injection is completed, a sealing pin needs to be welded to close the liquid injection hole. However, the welding of the sealing pin will cause a higher welding pool to protrude from the shell surface, thereby affecting the subsequent assembly of the battery.

[0050] Based on this, please refer to Figure 1 , Figure 1 The embodiment of the present invention provides a battery to improve the technical problem that the welding pool protrudes too high from the surface of the housing 100, that is, the so-called welding excess height problem.

[0051] The battery may include a housing 100 and a sealing member 200. The housing 100 includes a receiving chamber 11 and a liquid injection hole 12. The liquid injection hole 12 is in communication with the receiving chamber 11 for injecting electrolyte into the receiving chamber 11. The sealing member 200 is at least partially disposed in the liquid injection hole 12. One end of the sealing member 200 away from the receiving chamber 11 is sunk in the liquid injection hole 12 and is welded and fixed to the inner wall of the liquid injection hole 12 for sealing.

[0052] Then, by sinking one end of the sealing member 200 away from the accommodating cavity 11 in the injection hole 12, the height of the welding pool formed by welding between the sealing member 200 and the inner wall of the injection hole 12 protruding from the outer surface of the shell 100 can be reduced, and even the welding pool formed by welding between the sealing member 200 and the inner wall of the injection hole 12 can also be sunk in the injection hole 12, so as to improve the technical problem that the welding pool at the injection hole 12 protrudes too high from the outer surface of the shell 100, thereby facilitating the subsequent assembly of the battery.

[0053] The above is an overall explanation and description of the embodiment of the present application. The following will continue to illustrate the technical solution of the embodiment of the present application with examples in combination with some optional structures of the seal 200.

[0054] Please continue to refer to Figure 2 and Figure 3 , Figure 2 for Figure 1 An exploded view of the battery housing and seal is shown. Figure 3 for Figure 1 The schematic diagram of the structure of the sealing member and the busbar of the battery shown. The outer surface of the housing 100 includes a first orifice end face 13 forming an opening of the injection hole 12. The sealing member 200 includes a first end face 211 away from the accommodating cavity 11. The first end face 211 is located on the side of the first orifice end face 13 close to the accommodating cavity 11, so that the end of the sealing member 200 away from the accommodating cavity 11 is sunk into the injection hole 12.

[0055] In some embodiments, along the depth direction of the injection hole 12, the distance L1 between the first orifice end surface 13 and the first end surface 211 is less than or equal to 0.1 mm. For example, when the injection hole is a vertically extending through hole, the vertical direction is the depth direction of the injection hole 12, and along the depth direction of the injection hole 12, the distance L1 between the first orifice end surface 13 and the first end surface 211 can be the height difference between the first orifice end surface 13 and the first end surface 211.

[0056] Furthermore, on the one hand, it is possible to avoid the increase in welding defects of the seal 200 due to the distance L1 between the first orifice end face 13 and the first end face 211 being too large; on the other hand, it is possible to avoid the seal 200 being inserted into the injection hole 12 to a depth that is too large, so as to interfere with or short-circuit other components in the accommodating cavity 11 (such as the busbar 300 to be introduced later), etc., thereby improving the reliability of the battery.

[0057] For example, along the depth direction of the injection hole 12, the distance L1 between the first orifice end face 13 and the first end face 211 can be 0.01 mm, 0.02 mm, 0.031 mm, 0.035 mm, 0.04 mm, 0.043 mm, 0.05 mm, 0.059 mm, 0.065 mm, 0.07 mm, 0.082 mm, 0.095 mm or 0.1 mm, etc.

[0058] In some embodiments, the injection hole 12 includes a first section 121 and a second section 122 connected to each other. The inner diameter of the second section 122 is smaller than the inner diameter of the first section 121, and the second section 122 is located on the side of the first section 121 close to the accommodating cavity 11. Accordingly, the sealing member 200 includes an integrally formed welding section 21 and a blocking section 22, the welding section 21 is welded and fixed in the first section 121, and the blocking section 22 is arranged in the second section 122 to block the injection hole 12.

[0059] There are various ways to weld and fix the welding section 21 in the first section 121. For example, the welding section 21 is welded and fixed in the first section 121 by laser welding, which is not limited in the embodiment of the present application.

[0060] Then, it can be understood that, on the one hand, due to the step difference between the second section 122 and the first section 121, a step will be formed between the first section 121 and the second section 122, so that in the process of welding the welding section 21, the step between the first section 121 and the second section 122 can be used to limit the welding dust and / or laser cleaning dust from directly entering the accommodating chamber 11, thereby improving the reliability of the battery. On the second hand, by blocking the second section 122 with the blocking section 22, it can also further prevent the welding dust and / or laser cleaning dust from directly entering the accommodating chamber 11 after crossing the step, thereby further improving the reliability of the battery. On the third hand, the step between the first section 121 and the second section 122 can also be used to cooperate with the welding section 21 to limit the position, so as to prevent the seal 200 from being inserted too deep into the injection hole 12, thereby having a depth positioning effect on the insertion of the seal 200 into the injection hole 12, and finally avoiding the seal 200 from interfering with or short-circuiting other components in the accommodating chamber 11, etc., thereby improving the reliability of the battery.

[0061] In some embodiments, the seal 200 is a weldable metal part, such as the seal 200 can be made of aluminum, aluminum alloy, stainless steel or copper, which is not limited in the embodiments of the present application.

[0062] It should be noted that in the related art, the seal 200 may include only the welding section 21 but not the blocking section 22, and a rubber plug with interference fit is provided in the second section 122. Thus, the rubber plug may be inserted into the injection hole 12 first, so that the injection hole 12 is sealed by the rubber plug and the second section 122, and then the seal 200 may be placed in the injection hole 12 for welding.

[0063] Then, in the related art, when electrolyte leakage occurs in the accommodating chamber 11, since the rubber plug completely blocks the injection hole 12, the external device cannot detect whether there is leakage in the accommodating chamber 11 through the injection hole 12. In contrast, in the embodiment of the present application, the sealing section 22 can replace the rubber plug for sealing, and the seal 200 is made of metal and is inserted into the injection hole 12 later and then installed, so there is usually a very small gap between the sealing section 22 and the inner wall of the second section 122, and there is usually a small gap between the welding section 21 and the inner wall of the first section 121 due to the process assembly constraints, so it is possible to detect whether there is leakage inside the accommodating chamber 11 through the gap between the seal 200 and the injection hole 12, thereby reducing the safety hazards of the battery during later use.

[0064] Furthermore, since the embodiment of the present application can use a sealing segment 22 integrally formed with the welding segment 21 to replace the rubber plug in the related art for sealing, the step of installing the rubber plug can be omitted during the production and assembly process, and the assembly can be completed by only welding the welding segment 21, thereby improving the efficiency of battery production and assembly.

[0065] Furthermore, since the embodiment of the present application can use a sealing segment 22 integrally formed with the welding segment 21 instead of the rubber plug in the related art for sealing, during the longer service life of the battery, the battery provided by the embodiment of the present application will not have the risk of the rubber plug falling into the accommodating cavity 11, thereby further improving the reliability and stability of the battery.

[0066] Of course, in some other embodiments, the seal 200 may also be some weldable plastic parts. For example, the seal 200 may also be PVC (Polyvinyl Chloride) plastic parts, ABS (AcrylonitrileButadieneStyrene plastic, acrylonitrile-butadiene-styrene plastic) plastic parts, PMMA (Polymethylmethacrylate, acrylic) plastic parts, PC (Polycarbonate, polycarbonate) plastic parts, etc., which are not limited in the embodiments of the present application.

[0067] It can also be understood here that, in combination with the above-mentioned sealing member 200 being at least partially disposed in the injection hole 12, then one end of the sealing member 200 close to the accommodating cavity 11 may also be sunk in the injection hole 12, so that the sealing member 200 is completely located in the injection hole 12. Of course, one end of the sealing member 200 may also be inserted into the accommodating cavity 11, so that the sealing member 200 is only partially disposed in the injection hole 12, and the embodiment of the present application is not limited to this.

[0068] Exemplarily, the blocking section 22 includes a second end face 221 facing the accommodating cavity 11. The second end face 221 is the end face of the sealing member 200 facing the accommodating cavity 11. The inner surface of the housing 100 includes a second orifice end face 141 forming an opening of the injection hole 12, and the second end face 221 is located on a side of the second orifice end face 141 away from the accommodating cavity 11, so that the end face of the sealing member 200 facing the accommodating cavity 11 is sunk in the injection hole 12.

[0069] It can be understood that by sinking the end surface of the seal 200 facing the accommodating cavity 11 into the injection hole 12, the seal 200 can be prevented from being inserted into the accommodating cavity 11, thereby preventing the seal 200 from interfering with and / or short-circuiting other components in the accommodating cavity 11, thereby improving the reliability of the battery.

[0070] For example, the battery further includes a busbar 300. The injection hole 12 is disposed opposite to the busbar 300. Thus, by sinking the end surface of the sealing member 200 facing the accommodating cavity 11 into the injection hole 12, it is possible to prevent the sealing member 200 from being inserted into the accommodating cavity 11 and contacting the busbar 300, thereby preventing the busbar 300 from being damaged, or preventing the sealing member 200 from contacting the busbar 300 and causing a short circuit, etc.

[0071] Of course, in some other embodiments, the accommodating chamber 11 may also be provided with a winding core that is arranged opposite to the injection hole 12, etc., and the embodiment of the present application is not limited to this.

[0072] In some embodiments, the depth L2 of the plugging section 22 inserted into the second section 122 is greater than or equal to 0.2 mm; and / or the ratio of the depth of the plugging section 22 inserted into the second section 122 to the total depth of the injection hole 12 is 0.2 to 0.9.

[0073] It is understandable that in order to increase the capacity of the battery, the wall thickness of the shell 100 is usually not too large. Then, in the case of limited wall thickness of the shell 100, by inserting the blocking section 22 into the second section 122 with a depth L2 greater than or equal to 0.2 mm, it can be ensured that the blocking section 22 and the second section 122 have sufficient matching area, thereby improving the sealing effect, and can also cooperate with the step between the first section 121 and the second section 122 to further prevent welding dust and / or laser cleaning dust from entering the accommodating cavity 11, thereby improving the reliability and service life of the battery.

[0074] Similarly, by setting the ratio of the depth L2 of the sealing section 22 inserted into the second section 122 to the total depth L3 of the injection hole 12 to be 0.2 to 0.4, it is possible to ensure that the sealing section 22 and the second section 122 have sufficient matching area, and avoid the sealing section 22 from being inserted into the accommodating cavity 11, thereby improving the reliability of the battery of the embodiment of the present application.

[0075] In some embodiments, the depth L2 of the blocking segment 22 inserted into the second segment 122 can be 0.2 mm, 0.201 mm, 0.213 mm, 0.245 mm, 0.267 mm, 0.296 mm, 0.3 mm, 0.316 mm, 0.352 mm, 0.379 mm, 0.39 mm, 0.4 mm, 0.413 mm, 0.426 mm, 0.457 mm, 0.489 mm or 0.5 mm, etc., which is not limited to this embodiment of the present application.

[0076] In some embodiments, the ratio of the depth L2 of the blocking section 22 inserted into the second section 122 to the total depth L3 of the injection hole 12 is 0.2, 0.21, 0.217, 0.22, 0.225, 0.234, 0.241, 0.25, 0.274, 0.286, 0.295, 0.3, 0.32, 0.334, 0.345, 0.35, 0.364, 0.365, 0.37, 0.384, 0.392, 0.395, 0.4, 0.456, 0.5, 0.579, 0.65, 0.712, 0.8, 0.843, 0.867 or 0.9, etc., which is not limited to the embodiments of the present application.

[0077] In some embodiments, the inner wall of the housing 100 includes a first inner wall 15 disposed around the injection hole 12. The first inner wall 15 is provided with a boss 14. Part of the injection hole 12 is formed on the boss 14, so that the end surface of the boss 14 away from the first inner wall 15 forms a second orifice end surface 141. The blocking section 22 is at least partially located in the boss 14.

[0078] Therefore, by adding a boss 14 to the inner wall of the shell 100, the depth of the injection hole 12 can be increased to ensure that the sealing section 22 and the inner wall of the injection hole 12 have sufficient matching area, while avoiding excessive wall thickness at other positions of the shell 100 to reduce the capacity inside the shell 100.

[0079] In some embodiments, the inner wall of the injection hole 12 includes a first annular wall 16 disposed around the welding section 21, and the first annular wall 16 is disposed inwardly inclined at one end close to the second section 122. Therefore, it can also be simply understood that the first annular wall 16 forms a trumpet-shaped structure with an inner diameter gradually expanding outward, so as to form a first guide surface, thereby facilitating the insertion of the sealing member 200.

[0080] Of course, the first annular wall 16 may also be parallel to the depth direction of the injection hole 12, and this embodiment of the present application does not limit this.

[0081] In some embodiments, the inner wall of the injection hole 12 includes a step surface 17 connecting the first section 121 and the second section 122. A first chamfer 171 is provided at the connection between the step surface 17 and the second section 122, so that the sealing section 22 is inserted into the second section 122.

[0082] Specifically, the first chamfer 171 can be a round chamfer or a straight chamfer, which is not limited in the present embodiment. Of course, the connection between the step surface 17 and the second section 122 may not be chamfered, which is not limited in the present embodiment.

[0083] In some embodiments, a second chamfer 222 is provided at one end of the blocking section 22 away from the welding section 21 , so as to close the blocking section 22 and insert it into the second section 122 .

[0084] Specifically, the second chamfer 222 may be a round chamfer or a straight chamfer, which is not limited in the embodiment of the present application.

[0085] The second chamfer 222 may be a chamfer of 0.1 to 1 mm, thereby preventing the second chamfer 222 from being too small and difficult to manufacture, and preventing the second chamfer 222 from being too large and reducing the sealing area between the blocking section and the second section.

[0086] For example, the second chamfer 222 may be 0.1, 0.21, 0.3, 0.47, 0.55, 0.6, 0.7, 0.82, 0.95, or 1 mm.

[0087] Of course, the end of the sealing section 22 away from the welding section 21 may not be chamfered, and this embodiment of the present application does not limit this.

[0088] Please continue to refer to Figure 4 , Figure 4 for Figure 1 A schematic diagram of the structure of the second seal of the battery shown. In some embodiments, a welding section 21 is formed at one end of the seal 200 away from the accommodating cavity 11, and the outer peripheral side of the welding section 21 is welded and sealed with the inner wall of the injection hole 12. The distance L4 between the outer peripheral side of the welding section 21 and the inner wall of the injection hole 12 is 0.05 to 0.25 mm; and / or, the welding section 21 is provided with a first groove 212, and the notch of the first groove 212 is located on the end surface of the welding section 21 away from the accommodating cavity 11.

[0089] It is understandable that, on the one hand, if the distance between the outer peripheral side of the welding section 21 and the inner wall of the injection hole 12 is less than 0.05 mm, it will not only make it difficult to insert the welding section 21 into the injection hole 12, but also the welding between the outer peripheral side of the welding section 21 and the inner wall of the injection hole 12 may be loose because the space between the outer peripheral side of the welding section 21 and the inner wall of the injection hole 12 is too small. On the other hand, if the distance between the outer peripheral side of the welding section 21 and the inner wall of the injection hole 12 is greater than 0.25 mm, there may be a greater risk of defects in the solder formed between the outer peripheral side of the welding section 21 and the inner wall of the injection hole 12. It can be seen that the battery improved by the embodiment of the present application has the advantages of easy assembly and reliable welding.

[0090] Exemplarily, the distance between the outer peripheral side of the welding segment 21 and the inner wall of the injection hole 12 can be 0.05 mm, 0.06 mm, 0.072 mm, 0.08 mm, 0.097 mm, 0.1 mm, 0.124 mm, 0.135 mm, 0.14 mm, 0.155 mm, 0.167 mm, 0.181 mm, 0.195 mm, 0.2 mm, 0.212 mm, 0.22 mm, 0.235 mm, 0.241 mm or 0.25 mm, etc., and the embodiments of the present application are not limited to this.

[0091] It can also be understood that during the welding process of the outer peripheral side of the welding section 21 and the inner wall of the injection hole 12, the welding section 21 will form axial inward and / or axial outward tensile stress. At this time, by providing the first groove 212, the tensile stress formed during the welding process of the welding section 21 can be well released, thereby reducing welding defects and making the welding stronger after welding, thereby improving the reliability of the battery.

[0092] Please continue to refer to Figure 5 , Figure 5 for Figure 1 In some embodiments, the welding section 21 further comprises a second groove 213, and the second groove 213 is arranged on the groove bottom wall of the first groove 212. The second groove 213 is arranged around the outer edge of the groove bottom wall of the first groove 212.

[0093] Furthermore, the second groove 213 can make the groove sidewall of the first groove 212 more easily shrink and deform, thereby better releasing the tensile stress formed during the welding process.

[0094] For example, the welding section 21 may include a bottom surface 214 and an annular surface 215. The annular surface 215 is disposed around the bottom surface 214, so that the annular surface 215 and the bottom surface 214 are surrounded to form a first groove 212. The second groove 213 is an annular groove, the inner edge of the groove side wall of the annular groove is connected to the outer edge of the annular surface 215 throughout the circumference, and the outer edge of the groove side wall of the annular groove is connected to the annular surface 215 throughout the circumference.

[0095] In some embodiments, the housing 100 may be cylindrical, so the battery may also be called a cylindrical battery. Of course, the housing 100 may also be rectangular, so the battery may also be called a square battery, which is not limited in the present embodiment.

[0096] For example, please continue to refer to Figure 6 , Figure 6A schematic diagram of the structure of a battery provided in an embodiment of the utility model. The shell 100 may include a main shell 100a and an end cover 100b. The main shell 100a may be formed with a receiving cavity 11, and the end cover 100b is covered on the main shell 100a to close the receiving cavity 11. Then, at this time, the main shell 100a may be cylindrical, so that the shell 100 is a cylindrical structure as a whole. Of course, the main shell 100a may also be a rectangular parallelepiped, so that the shell 100 is a rectangular parallelepiped as a whole, and the embodiment of the present application does not limit this.

[0097] Accordingly, the liquid injection hole 12 can be disposed on the end cover 100b or on the main housing 100a, which is not limited in the embodiment of the present application.

[0098] Of course, the battery may further include a pole 400 disposed on the end cover 100a, etc., which is not limited in the embodiment of the present application.

[0099] The embodiment of the present application also provides an electronic device. The electronic device may include a battery as described above. The electronic device may include a game controller, household appliances, medical equipment, and transportation vehicles powered by a battery, etc., which is not limited in the embodiment of the present application.

[0100] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery, characterized in that: include: A shell, the shell comprising a receiving cavity and a liquid injection hole, the liquid injection hole being in communication with the receiving cavity for injecting electrolyte into the receiving cavity, the liquid injection hole comprising a first section and a second section connected to each other, the second section being located on a side of the first section close to the receiving cavity, and the inner diameter of the second section being smaller than the inner diameter of the first section; and The sealing member comprises an integrally formed welding section and a blocking section, wherein the blocking section is arranged in the second section to block the injection hole, and the welding section is sunk in the injection hole and fixedly welded to the inner wall of the injection hole.

2. The battery according to claim 1, characterized in that The outer surface of the shell includes a first orifice end surface forming an opening of the injection hole, and the sealing member includes a first end surface facing away from the accommodating cavity, and the first end surface is located on a side of the first orifice end surface close to the accommodating cavity; Wherein, along the depth direction of the injection hole, the distance between the first hole end face and the first end face is less than or equal to 0.1 mm.

3. The battery according to claim 1 or 2, characterized in that: The blocking section includes a second end surface facing the accommodating cavity, and the second end surface is an end surface of the sealing member facing the accommodating cavity; The inner surface of the shell includes a second orifice end face forming the opening of the injection hole, and the second end face is located on the side of the second orifice end face away from the accommodating cavity, so that the sealing member is sunk into the injection hole with one end face facing the accommodating cavity.

4. The battery according to claim 3, characterized in that The depth of the plugging section inserted into the second section is greater than or equal to 0.2 mm; and / or The ratio of the depth of the plugging section inserted into the second section to the total depth of the injection hole is 0.2 to 0.

9.

5. The battery according to claim 3, characterized in that The inner wall of the shell includes a first inner wall arranged around the injection hole, the first inner wall is provided with a boss, part of the injection hole is formed on the boss, so that the end surface of one side of the boss away from the first inner wall forms the second hole end surface; Wherein, the blocking section is at least partially located in the boss.

6. The battery according to claim 1 or 2, characterized in that: The inner wall of the injection hole comprises a first annular wall arranged around the welding section, wherein one end of the first annular wall close to the second section is inclined inwardly; and / or The inner wall of the injection hole comprises a step surface connecting the first section and the second section, and a first chamfer is provided at the connection between the step surface and the second section; and / or A second chamfer is provided at one end of the blocking section away from the welding section.

7. The battery according to any one of claims 1 or 2, characterized in that: The end of the sealing member away from the accommodating cavity forms a welding section, and the outer peripheral side of the welding section is welded and sealed with the inner wall of the injection hole; wherein, The distance between the outer circumference of the welding section and the inner wall of the injection hole is 0.05 to 0.25 mm; and / or The welding section is provided with a first groove, and the notch of the first groove is located on an end surface of the welding section that is away from the accommodating cavity.

8. The battery according to claim 7, characterized in that When the welding section is provided with a first groove, the welding section further comprises a second groove, the second groove is arranged on the groove bottom wall of the first groove, and the second groove is arranged around the outer end edge of the groove bottom wall of the first groove.

9. An electronic device, characterized in that: Comprising the battery according to any one of claims 1 to 8.

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