Battery and electric equipment

Abstract

The utility model discloses a battery and electric equipment, the battery comprises a shell, an electrode assembly and a top cover assembly, the top cover assembly comprises a top cover plate, a first insulating part, a second insulating part and an electrode terminal, the top cover plate is provided with a through hole, and the first insulating part is arranged between the electrode assembly and the top cover plate and is connected with the top cover plate; the electrode terminal comprises a first conductive part, a second conductive part and a heat absorption part; the first conductive part is connected with the electrode assembly, penetrates through the first insulating part and is partially arranged in the through hole; the first conductive part is partially arranged between the top cover plate and the electrode assembly and is connected with the first insulating part; the second conductive part is arranged on the side, away from the electrode assembly, of the first conductive part and conductively connected with the first conductive part, and the heat absorption part is arranged between the first conductive part and the second conductive part. The second insulating part surrounds the second conductive part and is connected with the second conductive part. The second insulating part is at least partially arranged between the second conductive part and the top cover piece and is connected with the top cover piece.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery and electrical equipment. Background Art

[0002] In the tab welding technology without connecting piece, the tab is directly welded to the pole of the top cover, which can effectively improve the internal utilization of the battery. However, due to the high welding temperature when welding the tab to the pole, the plastic around the pole will soften and overflow, and even damage the battery seal. Utility Model Content

[0003] Purpose of the utility model: An embodiment of the present application provides a battery, aiming to solve the problem of softening and overflow of plastic around the pole when welding the existing pole ears without connecting plates; another purpose of the embodiment of the present application is to provide an electrical device.

[0004] Technical solution: A battery according to an embodiment of the present application includes a housing having a receiving cavity;

[0005] An electrode assembly, disposed in the accommodating cavity;

[0006] A top cover assembly is connected to the shell and covers the accommodating cavity; the top cover assembly includes a top cover sheet, a first insulating member, a second insulating member and an electrode terminal, the top cover sheet has a through hole, the first insulating member is arranged between the electrode assembly and the top cover sheet and connected to the top cover sheet; the electrode terminal is passed through the through hole, the electrode terminal includes a first conductive part, a second conductive part and a heat absorbing part, the first conductive part is connected to the electrode assembly, an end of the first conductive part away from the electrode assembly passes through the first insulating member and is arranged in the through hole; an end of the first conductive part facing the electrode assembly is at least partially arranged in the top cover The cover sheet is between the electrode assembly and is connected to the first insulating member; the second conductive portion is arranged on the side of the first conductive portion away from the electrode assembly, the second conductive portion is conductively connected to the first conductive portion and at least partially protrudes from the side of the top cover sheet away from the electrode assembly; the heat absorption portion is arranged between the first conductive portion and the second conductive portion; the second insulating member is arranged around the second conductive portion and is connected to the second conductive portion, the second insulating member is at least partially arranged between the second conductive portion and the top cover sheet, and the side of the second insulating member away from the second conductive portion is at least partially connected to the top cover sheet.

[0007] In some embodiments, the electrode terminal has a receiving space, the first conductive portion is connected to the second conductive portion to enclose the receiving space, and the heat absorption portion is disposed in the receiving space.

[0008] In some embodiments, the first conductive part is provided with the accommodation space, the accommodation space runs through a side of the first conductive part away from the electrode assembly, and the second conductive part is connected to the first conductive part and covers the accommodation space.

[0009] In some embodiments, the second conductive part is provided with the accommodation space, the accommodation space runs through the side of the second conductive part facing the electrode assembly, and the first conductive part is connected to the second conductive part and covers the accommodation space.

[0010] In some embodiments, the electrode terminal is provided with a plurality of accommodating spaces, the plurality of accommodating spaces are arranged at intervals, the electrode terminal includes a plurality of heat absorbing parts, and each of the heat absorbing parts is arranged in one of the accommodating spaces.

[0011] In some embodiments, the electrode terminal further includes a column, which is disposed in the accommodation space and connected to the first conductive part and / or the second conductive part, and the heat absorption part is located in the accommodation space and is disposed around the column.

[0012] In some embodiments, the first conductive part is provided with the accommodating space, the accommodating space runs through the side of the first conductive part away from the electrode assembly, the column is arranged in the accommodating space and connected to the first conductive part, the second conductive part is provided with a groove on the side facing the first conductive part, and the end of the column away from the first conductive part is arranged in the groove.

[0013] In some embodiments, the heat sink includes a thermal phase change material.

[0014] In some embodiments, along the direction from the electrode assembly toward the top cover assembly, the electrode terminal and the accommodating space share a central axis.

[0015] Accordingly, an electrical device described in an embodiment of the present application includes a battery as described in any one of the above items, and the battery is used to provide the required electrical energy to the electrical device.

[0016] Compared with the prior art, a battery in an embodiment of the present application includes a shell, an electrode assembly and a top cover assembly, wherein the shell has a receiving cavity, the electrode assembly is arranged in the receiving cavity, the top cover assembly is connected to the shell and covers the receiving cavity; the top cover assembly includes a top cover sheet, a first insulating member, a second insulating member and an electrode terminal, the top cover sheet has a through hole, the first insulating member is arranged between the electrode assembly and the top cover sheet and connected to the top cover sheet; the electrode terminal includes a first conductive part, a second conductive part and a heat absorbing part; the first conductive part is connected to the electrode assembly, and one end of the first conductive part away from the electrode assembly passes through the first insulating member and is arranged in the through hole; One end of the first conductive part facing the electrode assembly is at least partially disposed between the top cover sheet and the electrode assembly, and is connected to the first insulating member; the second conductive part is disposed on the side of the first conductive part away from the electrode assembly, the second conductive part is conductively connected to the first conductive part and at least partially protrudes from the side of the top cover sheet away from the electrode assembly; the heat absorption part is disposed between the first conductive part and the second conductive part; the second insulating member is disposed around the second conductive part and is connected to the second conductive part, the second insulating member is at least partially disposed between the second conductive part and the top cover sheet, and the side of the second insulating member away from the second conductive part is at least partially connected to the top cover sheet. The present application divides the electrode terminal into a first conductive part and a second conductive part, and a heat absorption part is disposed between the first conductive part and the second conductive part, which can absorb part of the heat when the electrode terminal is welded to the electrode assembly, thereby reducing the heat transfer to the first insulating member and the second insulating member on the periphery of the electrode terminal, thereby reducing the risk of heat deformation and glue overflow of the first insulating member and the second insulating member during battery assembly.

[0017] Compared with the prior art, the embodiment of the present application further provides an electric device, including a battery as described in any one of the above, and the battery is used to provide the electric device with the required electric energy. It can be understood that the electric device has all the technical features and technical effects of the battery, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a schematic diagram of the overall structure of a battery in an embodiment of the present application;

[0020] Figure 2 is an exploded diagram of a battery according to an embodiment of the present application;

[0021] Figure 3 is an exploded view of a top cover assembly of an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of the overall structure of the electrode terminal of an embodiment of the present application;

[0023] Figure 5 is a cross-sectional view of a top cover assembly in which a first conductive portion of an embodiment of the present application is provided with a receiving space;

[0024] Figure 6 is a cross-sectional view of an electrode terminal in which a first conductive portion of an embodiment of the present application is provided with a receiving space;

[0025] Figure 7 is an exploded view of an electrode terminal in which a first conductive portion of an embodiment of the present application is provided with a receiving space;

[0026] Figure 8 is a cross-sectional view of a top cover assembly in which a second conductive portion of an embodiment of the present application is provided with a receiving space;

[0027] Fig. 9 is a cross-sectional view of an electrode terminal in which a second conductive portion of an embodiment of the present application is provided with a receiving space;

[0028] Fig.10 is an exploded view of an electrode terminal in which a second conductive portion of an embodiment of the present application is provided with a receiving space;

[0029] Fig.11 is an exploded view of an electrode terminal in which both the first conductive portion and the second conductive portion of an embodiment of the present application are provided with a receiving space;

[0030] Fig.12 is a cross-sectional view of a top cover assembly in which a plurality of accommodation spaces are arranged on the first conductive portion of an embodiment of the present application;

[0031] Fig.13 is a cross-sectional view of an electrode terminal in which a first conductive portion of an embodiment of the present application is provided with a plurality of accommodation spaces;

[0032] Fig.14 is an exploded view of an electrode terminal in which a first conductive portion of an embodiment of the present application is provided with a plurality of accommodation spaces;

[0033] Fig.15 is a cross-sectional view of a top cover assembly in which a column is arranged in a receiving space in an embodiment of the present application;

[0034] Fig.16 is a cross-sectional view of an electrode terminal in which a column is arranged in a receiving space in an embodiment of the present application;

[0035] Fig.17 is an exploded view of an electrode terminal of a column disposed in a receiving space in an embodiment of the present application;

[0036] Fig.18 It is a structural cross-sectional view of the column and the groove in the embodiment of the present application.

[0037] Figure numerals: 1. top cover assembly; 11. top cover sheet; 111. through hole; 12. electrode terminal; 121. heat absorption part; 122. accommodating space; 123. first conductive part; 124. second conductive part; 1241. groove; 125. column; 126. central axis; 13. first insulating part; 14. second insulating part; 2. shell; 21. accommodating cavity; 3. electrode assembly. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of 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.

[0039] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined. In the description of this application, "vertical" means completely vertical at 90° or almost completely vertical, for example, an angle within the range of 80° to 100° is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel, for example, an angle within 10° of completely parallel is considered parallel.

[0040] In recent years, with the development of the power battery industry, the battery capacity has increased year by year, and the tab welding technology without connecting tabs has become more and more popular, which can effectively improve the internal utilization rate of the battery. However, the tab welding technology without connecting tabs is not mature at present. In the production of the tab laser welding process, the upper and lower plastics around the pole are easily deformed and overflowed because the welding temperature exceeds the softening temperature of the upper and lower plastics.

[0041] In view of this, an embodiment of the present application provides a battery to solve the above-mentioned problem.

[0042] Please refer to Figure 1-Figure 17 The embodiment of the present application provides a battery, including a shell 2, an electrode assembly 3 and a top cover assembly 1, the shell 2 has a accommodating cavity 21, the electrode assembly 3 is arranged in the accommodating cavity 21, the top cover assembly 1 is connected to the shell 2 and covers the accommodating cavity 21; the top cover assembly 1 includes a top cover sheet 11, a first insulating member 13, a second insulating member 14 and an electrode terminal 12, the top cover sheet 11 has a through hole 111, the first insulating member 13 is arranged between the electrode assembly 3 and the top cover sheet 11 and is connected to the top cover sheet 11; the electrode terminal 12 is passed through the through hole 111, the electrode terminal 12 includes a first conductive portion 123, a second conductive portion 124 and a heat absorbing portion 121, the first conductive portion 123 is connected to the electrode assembly 3, and one end of the first conductive portion 123 away from the electrode assembly 3 passes through the first insulating member 13 and is arranged at the through hole 111. The hole 111 is provided; one end of the first conductive portion 123 facing the electrode assembly 3 is at least partially arranged between the top cover sheet 11 and the electrode assembly 3, and is connected to the first insulating member 13; the second conductive portion 124 is arranged on the side of the first conductive portion 123 away from the electrode assembly 3, the second conductive portion 124 is conductively connected to the first conductive portion 123 and at least partially protrudes from the side of the top cover sheet 11 away from the electrode assembly 3; the heat absorption portion 121 is arranged between the first conductive portion 123 and the second conductive portion 124; the second insulating member 14 is arranged around the second conductive portion 124 and is connected to the second conductive portion 124, the second insulating member 14 is at least partially arranged between the second conductive portion 124 and the top cover sheet 11, and the side of the second insulating member 14 away from the second conductive portion 124 is at least partially connected to the top cover sheet 11.

[0043] In the embodiment of the present application, the electrode terminal 12 is divided into a first conductive part 123 and a second conductive part 124, and a heat absorption part 121 is provided between the first conductive part 123 and the second conductive part 124, which can absorb part of the heat when the first conductive part 123 and the second conductive part 124 are welded and when the electrode terminal 12 is welded to the tab of the electrode assembly 3, thereby reducing the heat transfer to the first insulating member 13 and the second insulating member 14 on the peripheral side of the electrode terminal 12, thereby reducing the risk of heat deformation and glue overflow of the first insulating member 13 and the second insulating member 14 during battery assembly.

[0044] Specifically, the electrode terminal 12 in the embodiment of the present application may be a sandwich structure, that is, along the direction of the electrode assembly 3 toward the top cover assembly 1, the first conductive part 123, the heat absorbing part 121 and the second conductive part 124 are stacked at one time, and the heat absorbing part 121 can be mixed with a conductive material while having the ability to absorb heat, so that the heat absorbing part 121 has conductive properties, and the first conductive part 123 and the second conductive part 124 can be conductively connected, thus ensuring the normal conductive work of the electrode terminal 12. And when the electrode terminal 12 is welded to the tab of the electrode assembly 3, the heat absorbing part 121 can absorb part of the heat of the electrode terminal 12, thereby reducing the heat transfer of the electrode terminal 12 to the first insulating member 13 and the second insulating member 14, thereby reducing the softening and glue overflow of the first insulating member 13 and the second insulating member 14. It should be noted that the first insulating member 13 can be a lower plastic, the second insulating member 14 can be an upper plastic, the first insulating member 13 and the second insulating member 14 can be connected to achieve a larger area of ​​the electrode terminal 12 wrapped, at this time the surrounding side of the electrode terminal 12 can directly wrap the connected first insulating member 13 and the second insulating member 14 to maintain the structural stability of the sandwich structure electrode terminal 12. Of course, the first insulating member 13 and the second insulating member 14 can also be unconnected, at this time the edges of the first conductive part 123 and the second conductive part 124 are welded and connected by filling solder, etc., the first insulating member 13 can only be connected around the outer wall of the first conductive part 123, and the second insulating member 14 can only be connected around the outer wall of the second conductive part 124. Alternatively, other connection methods can be used to ensure that the electrode terminal 12 is a whole and has conductive properties.

[0045] Of course, the electrode terminal 12 of the embodiment of the present application can also be directly provided with a welding portion in the middle or edge of the first conductive part 123 and the second conductive part 124 to achieve direct butt welding of the two. In this case, the structure of the electrode terminal 12 can be kept stable and the conductive performance can be stable.

[0046] like Figure 4-Figure 17 As shown, further, in some embodiments, the electrode terminal 12 may also have a receiving space 122 , the first conductive portion 123 and the second conductive portion 124 are connected to enclose the receiving space 122 , and the heat absorption portion 121 is disposed in the receiving space 122 .

[0047] In the embodiment of the present application, the heat absorbing part 121 is accommodated in the accommodation space 122, so that the first conductive part 123 and the second conductive part 124 can be directly contacted and connected, so that the welding heat can be better transferred and the stability of the structure of the electrode terminal 12 can be maintained. At the same time, the heat absorbing part 121 can be located in the accommodation space 122 regardless of any form, so that the heat absorbing part 121 can be prevented from overflowing outward under high temperature, thereby maintaining the stability of the structure of the electrode terminal 12 and the local heat absorption performance.

[0048] It should be noted that the heat absorbing part 121 may or may not be conductive, and the first conductive part 123 and the second conductive part 124 may be directly conductive by contact. In the embodiment of the present application, the first conductive part 123 and the second conductive part 124 may be welded and connected by friction welding or the like.

[0049] It should also be noted that, in the embodiment of the present application, the accommodating space 122 may be a cylindrical, cubic, or other structure, without specific limitation.

[0050] Furthermore, in an embodiment of the present application, the heat absorption part 121 may include a thermal phase change material, or may be directly made of a thermal phase change material. In this case, when the electrode terminal 12 is welded to the pole ear, the heat absorption part 121 can absorb excessive heat, and the thermal phase change material changes from solid to liquid, absorbing part of the heat, resulting in a decrease in the temperature of the first insulating member 13 and the second insulating member 14 reaching the peripheral side, which is lower than its softening temperature, so that the top cover structure remains intact. When the welding of the pole ear of the electrode terminal 12 and the electrode assembly 3 is completed, the temperature of the first conductive part 123 and the second conductive part 124 decreases, and the heat absorption part 121 returns to a solid state. Therefore, the electrode terminal 12 of this structure can not only improve the welding efficiency, but also achieve high efficiency and high production capacity of the entire production line.

[0051] like Figure 5-Figure 7 As shown, in some embodiments, the first conductive part 123 is provided with a receiving space 122 , the receiving space 122 runs through the side of the first conductive part 123 away from the electrode assembly 3 , and the second conductive part 124 is connected to the first conductive part 123 and covers the receiving space 122 .

[0052] In the embodiment of the present application, the accommodation space 122 is opened in the first conductive part 123. At this time, the first conductive part 123 and the second conductive part 124 can be connected by friction welding or the like, so as to seal the heat absorption part 121 in the accommodation space 122. When the first conductive part 123 is welded to the tab of the electrode assembly 3, the excess heat during welding can be quickly absorbed, so that the temperature of the first conductive part 123 and the second conductive part 124 is reduced, thereby reducing the temperature transmitted to the second insulating member 14 and the first insulating member 13, thereby protecting the second insulating member 14 and the first insulating member 13 from softening or overflowing, realizing direct welding of the electrode assembly 3 and the electrode terminal 12, and maintaining the stability of the battery structure and the battery assembly efficiency.

[0053] like Figure 8-Figure 10 As shown, in some embodiments, the second conductive part 124 is provided with a receiving space 122 , the receiving space 122 runs through the side of the second conductive part 124 facing the electrode assembly 3 , and the first conductive part 123 is connected to the second conductive part 124 and covers the receiving space 122 .

[0054] In the embodiment of the present application, the accommodation space 122 can also be set in the second conductive part 124. In this case, the first conductive part 123 and the second conductive part 124 can be connected by friction welding or the like, so as to seal the heat absorption part 121 in the accommodation space 122. In this case, when the electrode terminal 12 and the electrode assembly 3 are welded, the heat absorption part 121 can be used to absorb excess heat, and the heat transfer to the second insulating member 14 and the first insulating member 13 can be reduced, thereby preventing the second insulating member 14 and the first insulating member 13 from softening or overflowing, realizing direct welding of the electrode assembly 3 and the electrode terminal 12, and maintaining the stability of the battery structure and the battery assembly efficiency.

[0055] like Fig.11 As shown, further, in the embodiment of the present application, the accommodation space 122 can be set at the same time on the first conductive part 123 and the second conductive part 124, so as to improve the heat absorption effect. Further, the two accommodation spaces 122 are arranged to be opposite and connected. At this time, the size of the heat absorption part 121 can be set as needed, and filled in the area where the two accommodation spaces 122 are spliced, so as to facilitate the combination of the electrode terminal 12.

[0056] like Figure 12-14 As shown, in some embodiments, the electrode terminal 12 may be provided with a plurality of accommodating spaces 122 , and the plurality of accommodating spaces 122 are arranged at intervals. The electrode terminal 12 includes a plurality of heat absorbing portions 121 , and each heat absorbing portion 121 is arranged in one accommodating space 122 .

[0057] Specifically, in the embodiment of the present application, multiple accommodating spaces 122 can be evenly distributed in the electrode terminal 12, and the distance between each accommodating space 122 and the edge of the electrode terminal 12 is equal. This ensures that the multiple accommodating spaces 122 absorb heat separately, and the heat transfer effect to the second insulating member 14 and the first insulating member 13 outside the electrode terminal 12 is the same, thereby avoiding localized heat transfer.

[0058] like Figure 15-17 As shown, in some embodiments, the electrode terminal 12 may further include a column 125 , which is disposed in the accommodating space 122 and connected to the first conductive portion 123 and / or the second conductive portion 124 , and the heat absorption portion 121 is located in the accommodating space 122 and is disposed around the column 125 .

[0059] In the embodiment of the present application, by arranging the column 125 in the accommodation space 122, when the column 125 is connected to the first conductive part 123 or the second conductive part 124, it can be used to limit the position of the heat conducting part and achieve a better heat transfer effect. When the column 125 is connected to the first conductive part 123 and the second conductive part 124 respectively, it can also achieve a better electrical conduction effect.

[0060] Further, such as Fig.18As shown, in some embodiments, the first conductive part 123 is provided with a accommodating space 122, the accommodating space 122 runs through the side of the first conductive part 123 away from the electrode assembly 3, the column 125 is arranged in the accommodating space 122 and connected to the first conductive part 123, the second conductive part 124 is provided with a groove 1241 on the side facing the first conductive part 123, and the end of the column 125 away from the first conductive part 123 is arranged in the groove 1241.

[0061] In the embodiment of the present application, by setting a groove 1241 in the second conductive part 124, the column 125 extends to the outside of the accommodating space 122 and is passed through the groove 1241. At this time, the mutual limitation of the column 125 and the groove 1241 is utilized to realize the mutual positioning of the first conductive part 123 and the second conductive part 124, thereby avoiding the misalignment of the first conductive part 123 and the second conductive part 124 when the electrode terminal 12 is combined and spliced, thereby reducing the dimensional error of the outer periphery of the electrode terminal 12 after the first conductive part 123 and the second conductive part 124 are spliced.

[0062] It should be noted that the column 125 is inserted into the groove 1241, and preferably the column 125 is abutted against the bottom of the groove 1241. At this time, the connection between the column 125 and the second conductive part 124 can be achieved, and the contact area between the first conductive part 123 and the second conductive part 124 is increased, thereby ensuring the overall conductive performance of the electrode terminal 12 and the structural strength of the electrode terminal.

[0063] like Figure 5 , Figure 8 , Fig.11 , Fig.15 As shown, in some embodiments, along the direction from the electrode assembly 3 toward the top cover assembly 1 , the electrode terminal 12 and the accommodating space 122 share a central axis 126 .

[0064] In the embodiment of the present application, the electrode terminal 12 and the accommodating space 122 are provided with a central axis 126, which can ensure that the accommodating space 122 is arranged in the middle of the electrode terminal 12, thereby maintaining uniform size between the accommodating space 122 and the second insulating member 14 or the first insulating member 13 on the peripheral side of the electrode terminal 12. At this time, after the heat absorption part 121 in the accommodating space 122 absorbs heat, the heat transferred to the second insulating member 14 or the first insulating member 13 can be uniform, thereby avoiding local heat.

[0065] In the specific embodiment of the present application, the electrode terminal 12 is taken as a negative pole as an example. At this time, the first conductive part 123 is made of copper, the second conductive part 124 is made of aluminum, the first conductive part 123 and the second conductive part 124 are connected by friction welding or the like, the accommodating space 122 is arranged in the first conductive part 123 and / or the second conductive part 124, the heat absorbing part 121 is encapsulated in the accommodating space 122, the number and shape of the accommodating space 122 can be changed, and the heat absorbing part 121 includes a thermal phase change material, wherein the thermal phase change material can be various paraffin materials, high-density polyethylene, etc. When the electrode terminal 12 is laser welded to the pole ear of the electrode assembly 3, the excessive heat is transferred to the heat absorbing part 121 through the first conductive part and absorbed, and the heat absorbing part 121 changes from solid to liquid, absorbing part of the heat, resulting in a decrease in the heat reaching the second insulating member 14 and the first insulating member 13, causing the temperature of the second insulating member 14 and the first insulating member 13 to be lower than the corresponding softening temperature, so that the structure of the top cover assembly 1 remains intact. When welding is completed, the temperature of the negative pole decreases and the thermal phase change material returns to a solid state, which effectively improves welding efficiency and the overall assembly efficiency of the battery.

[0066] The embodiment of the present application also provides an electric device, comprising a battery as described in any one of the above, wherein the battery is used to provide the electric device with the required electric energy. It is understandable that the electric device has all the technical features and technical effects of the battery, which will not be repeated here.

[0067] It should be noted that the electrical equipment in the embodiments of the present application includes but is not limited to: new energy vehicles, electric bicycles, electric motorcycles, backup power supplies, large batteries, etc.

[0068] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0069] The above is a detailed introduction to a battery and an electrical device provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: A housing having a receiving cavity; An electrode assembly, disposed in the accommodating cavity; A top cover assembly is connected to the shell and covers the accommodating cavity; the top cover assembly includes a top cover sheet, a first insulating member, a second insulating member and an electrode terminal, the top cover sheet has a through hole, the first insulating member is arranged between the electrode assembly and the top cover sheet and connected to the top cover sheet; the electrode terminal is passed through the through hole, and the electrode terminal includes a first conductive part, a second conductive part and a heat absorbing part; the first conductive part is connected to the electrode assembly, and one end of the first conductive part away from the electrode assembly passes through the first insulating member and is arranged in the through hole; one end of the first conductive part facing the electrode assembly is at least partially arranged in the top cover sheet The cover sheet is between the electrode assembly and is connected to the first insulating member; the second conductive portion is arranged on the side of the first conductive portion away from the electrode assembly, the second conductive portion is conductively connected to the first conductive portion and at least partially protrudes from the side of the top cover sheet away from the electrode assembly; the heat absorption portion is arranged between the first conductive portion and the second conductive portion; the second insulating member is arranged around the second conductive portion and is connected to the second conductive portion, the second insulating member is at least partially arranged between the second conductive portion and the top cover sheet, and the side of the second insulating member away from the second conductive portion is at least partially connected to the top cover sheet.

2. The battery according to claim 1, characterized in that The electrode terminal has a receiving space, the first conductive part and the second conductive part are connected to enclose the receiving space, and the heat absorption part is arranged in the receiving space.

3. The battery according to claim 2, characterized in that The first conductive part is provided with the accommodation space, and the accommodation space runs through a side of the first conductive part away from the electrode assembly. The second conductive part is connected to the first conductive part and covers the accommodation space.

4. The battery according to claim 2 or 3, characterized in that: The second conductive part is provided with the accommodation space, and the accommodation space runs through a side of the second conductive part facing the electrode assembly, and the first conductive part is connected to the second conductive part and covers the accommodation space.

5. The battery according to claim 2, characterized in that The electrode terminal is provided with a plurality of accommodating spaces, and the plurality of accommodating spaces are arranged at intervals. The electrode terminal includes a plurality of heat absorbing parts, and each of the heat absorbing parts is arranged in one of the accommodating spaces.

6. The battery according to claim 2, characterized in that The electrode terminal further includes a column, which is disposed in the accommodation space and connected to the first conductive part and / or the second conductive part. The heat absorption part is located in the accommodation space and is disposed around the column.

7. The battery according to claim 6, characterized in that The first conductive part is provided with the accommodating space, and the accommodating space runs through the side of the first conductive part away from the electrode assembly. The column is arranged in the accommodating space and connected to the first conductive part. The second conductive part is provided with a groove on the side facing the first conductive part, and the end of the column away from the first conductive part is arranged in the groove.

8. The battery according to any one of claims 1 to 3 and 5 to 7, characterized in that: The heat absorbing portion includes a thermal phase change material.

9. The battery according to claim 2, characterized in that Along the direction from the electrode assembly to the top cover assembly, the electrode terminal and the accommodating space share a central axis.

10. An electrical device, characterized in that: The invention comprises a battery as described in any one of claims 1 to 9, wherein the battery is used to provide the required electrical energy to the electrical device.

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