Battery

Abstract

The utility model relates to the technical field of batteries, and discloses a battery which comprises a shell, a pole, a battery cell, an insulating ring and a reference electrode, and the shell is provided with an accommodating space and a mounting hole communicated with the accommodating space; the pole is connected to the shell in an insulating manner; the battery cell is arranged in the accommodating space and comprises a battery cell body, a positive tab and a negative tab, the positive tab is electrically connected with the battery cell body and the pole, and the negative tab is electrically connected with the battery cell body and the shell; the insulating ring is arranged in the mounting hole; the reference electrode is connected to the battery cell body in an insulating manner, penetrates through the inner ring of the insulating ring and extends out of the shell, so that the insulating effect between the reference electrode and the shell can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery technical field, concretely relates to a battery. BACKGROUND

[0002] In the field of batteries, in order to better study the positive and negative electrode performance of the battery, a reference electrode is often used to test the potential of the positive and negative electrodes respectively.

[0003] When the reference electrode is led out from the battery shell, insulation needs to be provided between the reference electrode and the shell to ensure the accuracy of the reference potential detected by the reference electrode. In the current battery structure, there is still a risk of conductive contact between the reference electrode and the battery shell. SUMMARY

[0004] The utility model discloses at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery, which can improve the insulation effect between the reference electrode and the shell.

[0005] According to the battery of the utility model embodiment, including the shell, the pole, the electric core, the insulating ring and the reference electrode, the shell is equipped with the installation hole that contains the space and the communication, the pole is insulatedly connected in the shell, the electric core is arranged in the containing space, including the electric core body, the positive pole lug and the negative pole lug, the positive pole lug is electrically connected the electric core body and the pole, the negative pole lug is electrically connected the electric core body and the shell, the insulating ring is arranged in the installation hole, the reference electrode is insulatedly connected to the electric core body, and extends to the shell outside by being arranged in the inner ring of the insulating ring.

[0006] According to the battery of the utility model embodiment, at least has following beneficial effect: the shell is equipped with the installation hole that contains the space and the communication, the electric core is arranged in the containing space, and the electric core includes the electric core body, the positive pole lug and the negative pole lug, the positive pole lug is electrically connected the electric core body and the pole, the negative pole lug is electrically connected the electric core body and the shell. The insulating ring is arranged in the installation hole, the reference electrode is insulatedly connected to the electric core body, and extends to the shell outside by being arranged in the inner ring of the insulating ring, so, compared with the mode that the mode of the related art is separated by the insulating ring of the mode of the related art, the insulating ring in the embodiment can more stably separate the shell and the reference electrode, which helps to avoid the influence of the insulating effect between the reference electrode and the shell due to the failure of dispensing or the failure of glue, and the reference electrode can provide more accurate reference potential when testing the positive and negative electrode potential. In addition, the insulating ring can also provide a more accurate installation position for the reference electrode, which helps to improve the assembly efficiency of the battery.

[0007] According to some embodiments of the utility model, the electric core body is formed by winding the first diaphragm, the second diaphragm, the negative pole piece, the third diaphragm, the positive pole piece and the fourth diaphragm in sequence, the positive pole lug is electrically connected to the positive pole piece, the negative pole lug is electrically connected to the negative pole piece, and the reference electrode is inserted between the first diaphragm and the second diaphragm.

[0008] According to some embodiments of the present invention, the reference electrode extends between the first and second diaphragms of the outermost layer of the battery cell body.

[0009] According to some embodiments of the present invention, the insertion length of the reference electrode between the first diaphragm and the second diaphragm is greater than half the length of the cell body along the insertion direction of the reference electrode.

[0010] According to some embodiments of the present invention, the reference electrode is connected to the side of the cell body facing the housing where the mounting hole is provided.

[0011] According to some embodiments of the present invention, the reference electrode located in the accommodating space extends in a straight line from the cell body to the inner ring through which the insulating ring is inserted.

[0012] According to some embodiments of the present invention, the inner ring wall of the insulating ring abuts against the outer peripheral surface of the reference electrode to seal the gap between the insulating ring and the reference electrode.

[0013] According to some embodiments of the present invention, the housing includes an annular side shell, a first cover and a second cover, the first cover and the second cover respectively covering the two ends of the annular side shell along the axial direction to form an accommodating space; the negative electrode tab is electrically connected to the second cover; the electrode post is insulatedly connected to the first cover and located between the battery cell body and the first cover, the first cover is provided with a through hole opposite to the electrode post; the mounting hole is provided in the second cover, and the reference electrode is connected to the side of the battery cell body facing the second cover.

[0014] According to some embodiments of the present invention, the second cover has a negative electrode connection portion, a negative electrode ear is electrically connected to the negative electrode connection portion, and mounting holes and the negative electrode connection portion are spaced apart.

[0015] According to some embodiments of the present invention, the outer periphery of the second cover has a side shell connecting portion, which is connected to the annular side shell, and the mounting hole and the side shell connecting portion are spaced apart.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 A schematic diagram of the battery structure provided in an embodiment of this utility model is shown;

[0019] Figure 2 It shows Figure 1 A schematic diagram of the structure of the battery cell body;

[0020] Figure 3 Fig. 1 shows a schematic structural view of a battery; Figure 1 Fig. 2 shows a schematic sectional view of a part of a battery core body;

[0021] Figure 4 Fig. 3 shows a schematic structural view of a second cover; Figure 1 Fig. 4 shows a schematic structural view of a second cover.

[0022] Reference signs:

[0023] Battery 100;

[0024] Housing 110; accommodating space 111; annular side shell 113; first annular surface 1131; second annular surface 1133; third annular surface 1135; first cover 115; through hole 1151; second cover 117; mounting hole 1171; negative electrode connecting part 1173; first annular boundary line 1175; side shell connecting part 1177; second annular boundary line 1179;

[0025] Pole 130; connecting part 131; protruding part 133;

[0026] Battery core 150; battery core body 151; first diaphragm 1511; second diaphragm 1513; negative electrode sheet 1515; third diaphragm 1517; positive electrode sheet 1519; fourth diaphragm 1521; positive electrode lug 153; negative electrode lug 155;

[0027] Insulating ring 170; reference electrode 190; sealing rubber ring 210; length direction Y. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0029] In the description of the present application, it should be understood that, in relation to the position description, for example, the position or location relationship indicated by the upper, lower, front, rear, left, right, etc. is based on the position or location relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0030] In the description of the utility model, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. Understand as not including the number, above, below, within, etc. Understand as including the number. If it is described to the first, the second is only used for distinguishing the purpose of technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0031] In the description of the utility model, unless otherwise defined, the words such as setting, installation, connection should be understood in a broad sense, and the person skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0032] In the description of the utility model, the description of reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] Please refer to Figure 1 The embodiment of the application provides a battery 100, which can be a button cell or other type of battery.

[0034] The battery 100 comprises a shell 110, a pole 130, a battery cell 150, an insulating ring 170 and a reference electrode 190.

[0035] The shell 110 is provided with a containing space 111 and a mounting hole 1171 communicating with the containing space 111, specifically, the inside of the shell 110 can be provided with the containing space 111, and the shell wall of the shell 110 can be provided with the mounting hole 1171.

[0036] The pole 130 and the shell 110 can be respectively used as the positive connection structure and the negative connection structure of the battery 100, and the pole 130 is insulatedly connected to the shell 110, which helps to avoid short circuit of the positive and negative poles of the battery 100.

[0037] As an example, the shell 110 can adopt a stainless steel shell or other conductive metal shell.

[0038] The battery cell 150 is arranged in the containing space 111, and the containing space 111 can also be filled with electrolyte.

[0039] The electric core 150 includes an electric core body 151, a positive pole lug 153, and a negative pole lug 155. The positive pole lug 153 is electrically connected to the electric core body 151 and the pole 130. The negative pole lug 155 is electrically connected to the electric core body 151 and the shell 110.

[0040] The insulating ring 170 is arranged in the mounting hole 1171. The reference electrode 190 is insulatedly connected to the electric core body 151 and extends out of the shell 110 through the inner ring of the insulating ring 170. Thus, compared with the way of separating the shell and the reference electrode by using the dispensing method in the related art, the insulating ring 170 in the embodiment can more stably separate the shell 110 and the reference electrode 190, which helps to avoid affecting the insulation effect between the reference electrode 190 and the shell 110 due to dispensing failure or glue failure. The reference electrode 190 can provide a more accurate reference potential when testing the positive and negative electrode potentials. In addition, the insulating ring 170 can also provide a more accurate installation position for the reference electrode 190, which helps to improve the assembly efficiency of the battery 100.

[0041] Please refer to Figures 1 to 3 In some embodiments, the electric core body 151 can adopt a wound core structure.

[0042] In some embodiments, the electric core body 151 can be wound by sequentially stacking a first diaphragm 1511, a second diaphragm 1513, a negative pole sheet 1515, a third diaphragm 1517, a positive pole sheet 1519, and a fourth diaphragm 1521. The second diaphragm 1513, the third diaphragm 1517, and the fourth diaphragm 1521 can all be used to separate the positive pole sheet 1519 and the negative pole sheet 1515, which helps to avoid contact short circuit of the positive pole sheet 1519 and the negative pole sheet 1515 after winding.

[0043] It should be noted that when the first diaphragm 1511, the second diaphragm 1513, the negative pole sheet 1515, the third diaphragm 1517, the positive pole sheet 1519, and the fourth diaphragm 1521 are sequentially stacked and start to be wound, the first diaphragm 1511 can be located at the innermost side during winding, and the fourth diaphragm 1521 can be located at the outermost side during winding. Alternatively, the first diaphragm 1511 can be located at the outermost side during winding, and the fourth diaphragm 1521 can be located at the innermost side during winding.

[0044] The positive pole lug 153 can be electrically connected to the positive pole sheet 1519, and the negative pole lug 155 can be electrically connected to the negative pole sheet 1515.

[0045] As an example, the positive pole lug 153 can be welded between the positive pole sheet 1519 and the pole 130, and the negative pole lug 155 can be welded between the negative pole sheet 1515 and the shell 110.

[0046] The positive and negative tabs 153 and 155 can be located on opposite sides of the length direction Y of the cell body 151, or on the same side of the length direction Y of the cell body 151. In this embodiment, the positive and negative tabs 153 and 155 are located on opposite sides of the length direction Y of the cell body 151.

[0047] The reference electrode 190 can be inserted between the first and second separators 1511 and 1513, which can be used to separate the reference electrode 190 from the positive tab 1519 and the negative tab 1515, thereby helping to ensure the insulation effect between the reference electrode 190 and the cell body 151 and helping the reference electrode 190 to provide a more accurate reference potential.

[0048] In some embodiments, the reference electrode 190 can be inserted between the first and second separators 1511 and 1513 of the outermost layer of the cell body 151, so that the reference electrode 190 can be placed between the first and second separators 1511 and 1513 more conveniently, thereby improving the assembly efficiency.

[0049] It can be understood that when the first, second, third, fourth, fifth and sixth separators 1511, 1513, 1515, 1517, 1519 and 1521 are sequentially stacked and wound, there can be multiple layers distributed outward from the winding center, and each layer can include the stacked first, second, third, fourth, fifth and sixth separators 1511, 1513, 1515, 1517, 1519 and 1521.

[0050] In this embodiment, the outermost layer of the cell body 151 can refer to the first, second, third, fourth, fifth and sixth separators 1511, 1513, 1515, 1517, 1519 and 1521 that are stacked in the outermost layer of the cell body 151.

[0051] As an example, when the first separator 1511 can be located on the innermost side of the cell body 151 when wound, the outermost layer of the cell body 151 can be sequentially distributed from the inner side to the outer side of the cell body 151 as the first, second, third, fourth, fifth and sixth separators 1511, 1513, 1515, 1517, 1519 and 1521. When installing the reference electrode 190, the second, third, fourth, fifth and sixth separators 1513, 1515, 1517, 1519 and 1521 can be lifted, and the reference electrode 190 can be placed between the first and second separators 1511 and 1513.

[0052] As another example, when the first separator 1511 can be located at the outermost side of the winding of the battery cell body 151, then the outermost layer of the battery cell body 151 can be distributed from the inner side to the outer side of the battery cell body 151 as the fourth separator 1521, the positive electrode sheet 1519, the third separator 1517, the negative electrode sheet 1515, the second separator 1513, and the first separator 1511. When the reference electrode 190 is installed, the first separator 1511 can be lifted, and the reference electrode 190 can be placed between the first separator 1511 and the second separator 1513.

[0053] It should be noted that the positions of the positive electrode sheet 1519 and the negative electrode sheet 1515 can also be exchanged with each other.

[0054] In some embodiments, the insertion length of the reference electrode 190 between the first separator 1511 and the second separator 1513 can be greater than half the length of the battery cell body 151 along the insertion direction of the reference electrode 190, i.e., H>1 / 2L(as shown in FIG. 15B), so as to improve the contact area of the reference electrode 190 inside the battery cell body 151, and help the reference electrode 190 to provide a more accurate reference potential. Figure 3

[0055] Specifically, the insertion length of the reference electrode 190 between the first separator 1511 and the second separator 1513 can be greater than half the length of the battery cell body 151 along the length direction Y.

[0056] It can be understood that the length of the battery cell body 151 along the length direction Y is approximately equal to the width L of the separator (the first separator 1511, the second separator 1513, the third separator 1517, or the fourth separator 1521) along the length direction Y.

[0057] Preferably, the insertion length of the reference electrode 190 between the first separator 1511 and the second separator 1513 can be 2 / 3 of the length of the battery cell body 151 along the insertion direction of the reference electrode 190.

[0058] Referring to FIGS. 15A and 15B, Figure 1 Figure 4 In some embodiments, the reference electrode 190 can be connected to the side of the battery cell body 151 toward which the mounting hole 1171 of the shell 110 is provided, so as to avoid the need to bend the reference electrode 190 to the inner ring of the insulating ring 170 when the reference electrode 190 is led out from the other side of the battery cell body 151, and help to reduce the problem of the reference electrode 190 contacting the shell 110 during the bending process.

[0059] As an example, the mounting hole 1171 can be provided on one side of the shell 110 along the length direction Y of the battery cell body 151.

[0060] ​​In some embodiments, the reference electrode 190 located in the accommodation space 111 can be linearly extended to the inner ring of the insulating ring 170 by the battery body 151, so as to reduce the contact and conduction between the reference electrode 190 and the shell 110 or other structural members due to the bending of the reference electrode 190, and help the reference electrode 190 to provide a more accurate reference potential.

[0061] It should be noted that the reference electrode 190 located outside the shell 110 can be bent or not bent according to requirements.

[0062] In some embodiments, the insulating ring 170 can be fixed in the mounting hole 1171 in various ways.

[0063] As an example, the outer ring wall of the insulating ring 170 can abut against the hole wall of the mounting hole 1171, and the insulating ring 170 can be fixed in the mounting hole 1171 by interference and seal the gap between the hole wall of the mounting hole 1171 and the outer ring wall of the insulating ring 170.

[0064] As another example, an adhesive layer can be provided between the outer ring wall of the insulating ring 170 and the hole wall of the mounting hole 1171, and the adhesive layer can bond the insulating ring 170 to the hole wall of the mounting hole 1171 and seal the gap between the hole wall of the mounting hole 1171 and the outer ring wall of the insulating ring 170.

[0065] As another example, the insulating ring 170 can include a first annular segment, a second annular segment and a third annular segment connected in sequence along the axial direction. The outer peripheral diameter of the second annular segment can be smaller than the outer peripheral diameters of the first annular segment and the third annular segment. The second annular segment can be arranged in the mounting hole 1171, and the outer peripheral wall of the second annular segment can abut against the hole wall of the mounting hole 1171 to seal the gap between the outer peripheral surface of the second annular segment and the hole wall of the mounting hole 1171.

[0066] The first annular segment can be located in the accommodation space 111, and the third annular segment can be located outside the shell 110. The first annular segment and the third annular segment can abut against the inner and outer sides of the shell 110, respectively, so as to fix the insulating ring 170 in the mounting hole 1171. In this example, the insulating ring 170 can adopt an elastic structural member such as a rubber ring or a silica gel ring to be arranged in the mounting hole 1171 by deforming itself.

[0067] In some embodiments, the inner ring wall of the insulating ring 170 can abut against the outer peripheral surface of the reference electrode 190 to seal the gap between the insulating ring 170 and the reference electrode 190, so as to improve the sealing effect of the accommodation space 111, help to reduce the leakage of electrolyte, and also reduce the sealing process such as dispensing, and help to improve the assembly efficiency.

[0068] As an example, the inner ring of the insulation ring 170 is substantially in the shape of a circular hole, and the reference electrode 190 is substantially in the shape of a conductive wire with a circular cross section, so as to better match the shape of the inner ring of the insulation ring 170. The conductive wire can be a copper wire or other conductive wire.

[0069] The insulation ring 170 can be a rubber ring, a silica gel ring, or other elastic insulation structure, and the elastic insulation ring can abut against the outer circumferential surface of the reference electrode 190 by its own elasticity.

[0070] In some embodiments, the shell 110 can include a ring-shaped side shell 113, a first cover 115, and a second cover 117.

[0071] The first cover 115 and the second cover 117 can be respectively arranged at the two axial ends of the ring-shaped side shell 113 to enclose the accommodation space 111.

[0072] As an example, the ring-shaped side shell 113 is substantially in the shape of a circular ring, and the first cover 115 and the second cover 117 are substantially in the shape of a plate structure. The ring-shaped side shell 113 can be provided with a first step and a second step at the two ends, respectively, and the first cover 115 can be welded to the first step, and the second cover 117 can be welded to the second step.

[0073] Taking the first step as an example, the first step can include a first annular surface 1131, a second annular surface 1133, and a third annular surface 1135. The first annular surface 1131 can be an end surface of the ring-shaped side shell 113, the third annular surface 1135 can be spaced apart from the first annular surface 1131 along the axial direction of the ring-shaped side shell 113, and the second annular surface 1133 can be connected between the first annular surface 1131 and the third annular surface 1135.

[0074] The first cover 115 can be arranged on the third annular surface 1135, the second annular surface 1133 can surround the outer circumferential surface of the first cover 115, and the first annular surface 1131 can be substantially flush with the end surface of the first cover 115. When welding the first cover 115 and the ring-shaped side shell 113, the outer circumferential surface of the first cover 115 and the second annular surface 1133 can be welded together.

[0075] The thickness of the first cover 115 can be substantially equal to the distance between the first annular surface 1131 and the third annular surface 1135, so that the surface of the first cover 115 can be substantially flush with the first annular surface 1131.

[0076] The connection between the second cover 117 and the second step can refer to the connection between the first cover 115 and the first step, and will not be described again.

[0077] The negative tab 155 can be electrically connected to the second cover 117, for example, the negative tab 155 can be welded to the second cover 117.

[0078] The pole 130 is insulatedly connected to the first cover 115 and located between the battery body 151 and the first cover 115, so as to fix the pole 130 and facilitate the electrical connection between the positive tab 153 and the pole 130.

[0079] The first cover 115 is provided with a through hole 1151 opposite to the pole 130, so as to expose the pole 130 and facilitate the electrical connection of the pole 130 with other devices.

[0080] As an example, the pole 130 can include a connecting portion 131 and a protruding portion 133, the connecting portion 131 is substantially plate-shaped. The protruding portion 133 can be protruded from the connecting portion 131 and inserted into the through hole 1151. The protruding portion 133 can be spaced from the hole wall of the through hole 1151, which helps to avoid the electrical connection between the pole 130 and the first cover 115. The connecting portion 131 can be spaced from the annular side shell 113, which helps to avoid the electrical connection between the pole 130 and the annular side shell 113.

[0081] The battery 100 can further include an annular sealing ring 210, the connecting portion 131 can be located between the battery body 151 and the first cover 115, the annular sealing ring 210 can be connected between the connecting portion 131 and the first cover 115, and the protruding portion 133 can be sequentially inserted into the inner ring of the sealing ring 210 and passed through the through hole 1151. The annular sealing ring 210 can be made of hot melt material, and the annular sealing ring 210 can be connected and fixed with the pole 130 and the first cover 115 after hot pressing. The sealing ring 210 can also be partially located between the protruding portion 133 and the hole wall of the through hole 1151, so as to better separate the protruding portion 133 and the first cover 115.

[0082] It should be noted that the pole 130 can also be insulatedly connected to the first cover 115 by other means, for example, the pole 130 can be adhered to the first cover 115 by insulation glue.

[0083] The mounting hole 1171 can be provided on the second cover 117, and the reference electrode 190 can be connected to the side of the battery body 151 facing the second cover 117, so as to reduce the problem of electrical connection between the bent reference electrode 190 and the annular side shell 113, and also facilitate the setting of the mounting hole 1171 on the second cover 117 and reduce the difficulty of punching.

[0084] Specifically, since the reference electrode 190 is led out from one side of the length direction Y of the battery body 151, the first cover 115 and the second cover 117 are respectively located on opposite sides of the length direction Y of the battery body 151. When the mounting hole 1171 is arranged on the second cover 117, the reference electrode 190 can be directly led out from the battery body 151 to one side of the second cover 117 without being bent to the annular side shell 113, so that the problem of the reference electrode 190 being bent and the annular side shell 113 being conductive can be reduced.

[0085] In addition, if the mounting hole 1171 is arranged on the first cover 115, the mounting hole 1171 needs to penetrate the pole 130 and the first cover 115 at the same time, and the pole 130 and the first cover 115 both need to be punched, which not only increases the number of punching, but also may affect the installation accuracy of the insulating ring 170. Therefore, in the embodiment, the mounting hole 1171 is arranged on the second cover 117, which not only reduces the number of punching and reduces the difficulty of punching, but also facilitates the installation of the insulating ring 170.

[0086] In some embodiments, the second cover 117 can have a negative electrode connecting portion 1173, and the negative electrode lug 155 can be electrically connected to the negative electrode connecting portion 1173. The mounting hole 1171 and the negative electrode connecting portion 1173 can be arranged at intervals, so as to lengthen the distance between the insulating ring 170 and the negative electrode connecting portion 1173, which helps to reduce the influence of the insulating ring 170 on the welding process of the negative electrode lug 155 and the negative electrode connecting portion 1173, or helps to reduce the influence of the insulating ring 170 on the welding between the negative electrode lug 155 and the negative electrode connecting portion 1173.

[0087] As an example, the second cover 117 can be provided with a first annular boundary line 1175, and the area inside the inner ring of the first annular boundary line 1175 can be the negative electrode connecting portion 1173. The negative electrode lug 155 can be electrically connected to the area inside the ring of the first annular boundary line 1175, and the mounting hole 1171 can be arranged in other areas outside the first annular boundary line 1175.

[0088] The first annular boundary line 1175 can be circular, elliptical, semicircular, polygonal or other shapes.

[0089] It should be noted that the first annular boundary line 1175 can be printed or coated on the second cover 117, or can be machined (such as machining, stamping, etc.) on the second cover 117. The first annular boundary line 1175 can be a flat line, or a concave annular groove, or a convex annular protrusion.

[0090] In some embodiments, the diameter of the negative electrode connecting portion 1173 can be greater than the width of the negative electrode lug 155.

[0091] As an example, the minimum diameter of the negative electrode connecting portion 1173 can be 1 mm to 2 mm greater than the width of the negative electrode tab 155.

[0092] In some embodiments, the outer periphery of the second cover 117 has a side shell connecting portion 1177 connected to the annular side shell 113. The mounting hole 1171 and the side shell connecting portion 1177 are arranged at intervals, so that the distance between the insulating ring 170 and the side shell connecting portion 1177 can be extended, which helps to reduce the influence of the insulating ring 170 on the welding between the annular side shell 113 and the side shell connecting portion 1177, or to reduce the influence of the insulating ring 170 on the welding between the negative electrode tab 155 and the negative electrode connecting portion 1173.

[0093] As an example, the second cover 117 can be provided with a second annular boundary line 1179, which can be located at a position close to the outer periphery of the second cover 117. The negative electrode connecting portion 1173 can be located within the ring of the second annular boundary line 1179. The annular area outside the second annular boundary line 1179 can be the side shell connecting portion 1177. The mounting hole 1171 can be arranged within the ring of the second annular boundary line 1179, specifically, the mounting hole 1171 can be arranged in the region between the first annular boundary line 1175 and the second annular boundary line 1179.

[0094] The second annular boundary line 1179 can be circular, elliptical, semicircular, polygonal, or other shapes.

[0095] It should be noted that the second annular boundary line 1179 can be printed or coated on the second cover 117, or can be machined (such as machining, stamping, etc.) on the second cover 117. The second annular boundary line 1179 can be a flat line, or a concave annular groove, or a convex annular protrusion.

[0096] In some embodiments, the width of the side shell connecting portion 1177 can be greater than the width of the third annular surface 1135, which helps to avoid interference between the mounting hole 1171 and the third annular surface 1135, and affects the installation of the insulating ring 170.

[0097] The width of the side shell connecting portion 1177 can refer to the distance between the second annular boundary line 1179 and the outer periphery of the second cover 117.

[0098] The width of the third annular surface 1135 can refer to the distance between the inner annular surface of the annular side shell 113 and the second annular surface 1133 along the radial direction of the annular side shell 113.

[0099] In the battery 100 provided by the embodiment of the application, the shell 110 is provided with a containing space 111 and a mounting hole 1171 in communication with the containing space 111, the battery cell 150 is arranged in the containing space 111, the battery cell 150 comprises a battery cell body 151, a positive electrode lug 153 and a negative electrode lug 155, the positive electrode lug 153 is electrically connected with the battery cell body 151 and the pole 130, and the negative electrode lug 155 is electrically connected with the battery cell body 151 and the shell 110. The insulating ring 170 is arranged in the mounting hole 1171, the reference electrode 190 is insulatedly connected with the battery cell body 151 and extends out of the shell 110 through the inner ring of the insulating ring 170. Thus, compared with the mode of separating the shell and the reference electrode by using the dispensing mode in the related art, the insulating ring 170 in the embodiment can more stably separate the shell 110 and the reference electrode 190, which helps to avoid affecting the insulation effect between the reference electrode 190 and the shell 110 due to dispensing failure or glue failure, the reference electrode 190 can provide a more accurate reference potential when testing the positive and negative electrode potentials, and in addition, the insulating ring 170 can also provide a more accurate mounting position for the reference electrode 190, which helps to improve the assembly efficiency of the battery 100.

[0100] The above has made a detailed description of the embodiments of the application in combination with the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the application. In addition, the embodiments of the application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A battery, characterized by, The application relates to a shell, a pole, an electric core, an insulating ring and a reference electrode. The shell is provided with a containing space and a mounting hole communicating with the containing space. The pole is insulatedly connected to the shell. The electric core is arranged in the containing space and comprises an electric core body, a positive electrode lug and a negative electrode lug. The positive electrode lug is electrically connected to the electric core body and the pole. The negative electrode lug is electrically connected to the electric core body and the shell.

2. The battery of claim 1, wherein, The insulating ring is arranged in the mounting hole.

3. The battery of claim 2, wherein, The reference electrode is insulatedly connected to the electric core body and extends out of the shell through an inner ring of the insulating ring.

4. The battery of claim 2, wherein, The electric core body is formed by winding a first diaphragm, a second diaphragm, a negative electrode sheet, a third diaphragm, a positive electrode sheet and a fourth diaphragm in sequence.

5. The battery of claim 1, wherein, The positive electrode lug is electrically connected to the positive electrode sheet.

6. The battery of claim 5, wherein, The negative electrode lug is electrically connected to the negative electrode sheet.

7. The battery of claim 1, wherein, The reference electrode extends into the first diaphragm and the second diaphragm of the outermost layer of the electric core body.

8. The battery of claim 1, wherein, The extension length of the reference electrode between the first diaphragm and the second diaphragm is greater than half the length of the electric core body along the extension direction of the reference electrode. The reference electrode is connected to the electric core body towards the side of the shell provided with the mounting hole. The reference electrode in the containing space extends in a straight line to the inner ring of the insulating ring. The inner ring wall of the insulating ring abuts against the outer circumferential surface of the reference electrode to seal the gap between the insulating ring and the reference electrode.

9. The battery of claim 8, wherein, The shell comprises a ring-shaped side shell, a first cover body and a second cover body.

10. The battery of claim 8, wherein, The first cover body and the second cover body are respectively arranged at the two axial ends of the ring-shaped side shell to enclose the containing space. The negative electrode lug is electrically connected to the second cover body. The pole is insulatedly connected to the first cover body and is located between the electric core body and the first cover body. The first cover body is provided with a through hole opposite to the pole. The mounting hole is arranged in the second cover body. The reference electrode is connected to the side of the electric core body towards the second cover body. The second cover body has a negative electrode connecting portion. The negative electrode lug is electrically connected to the negative electrode connecting portion. The mounting hole and the negative electrode connecting portion are arranged in a spaced manner. The second cover body has a side shell connecting portion. The side shell connecting portion is connected to the ring-shaped side shell. The mounting hole and the side shell connecting portion are arranged in a spaced manner.

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