Battery and electric device

Abstract

The invention discloses a battery which comprises a battery cell, a cover plate, a second insulating part, a pole and a pressing part, wherein a tab is led out of the battery cell; the cover plate is provided with a first opening in the first direction. The second insulating part covers the surface, facing the battery cell in the first direction, of the cover plate; a second opening is formed in the position, corresponding to the first opening, of the second insulating layer in the first direction; the cover plate is provided with a pole, and the first opening enables at least part of the pole to be exposed; the pressing piece is connected with the second insulating piece, and the pressing piece can rotate relative to the second insulating piece, so that the pressing piece has a first state limited in the second opening and the first opening and a second state separated from the second opening and the first opening; when the pressing piece is in the first state, the tab partially extends between the pressing piece and the pole, and the projections of the pressing piece, the tab and the pole in the first direction at least partially coincide to form a welding area. Therefore, according to the battery, the manufacturing cost of ultrasonic welding and laser welding of the adapter plate can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a battery and an electrical device. Background Art

[0002] Lithium-ion batteries have now become the preferred battery for new energy vehicles and energy storage power stations. Battery tabs are an important component in lithium-ion batteries. Batteries are divided into positive and negative electrodes. Tabs (divided into positive tabs and negative tabs) are metal conductors that lead the positive and negative electrodes out of the battery cell. That is, the battery is electrically connected to the corresponding poles on the top cover through the tabs on the battery cell, thereby conducting the current from the inside of the battery to the outside of the battery.

[0003] As people's requirements for the range of single-time new energy vehicles continue to increase, there is a demand for lower prices and usage costs of lithium batteries. This has led to higher and higher requirements for the energy density of batteries that use lithium batteries as a driving energy source, and costs have continued to fall.

[0004] In the prior art, an adapter is usually provided to connect the pole lug and the pole column. However, after the adapter is welded and the battery cell is inserted into the shell, due to the excessive length of the pole lug, over-welding and adapter welding, the position of the pole lug is poorly fixed. The welding position of the pole lug will aggravate the impact on safety, and safety problems such as the pole lug being inserted inwardly and the pole lug being short-circuited with the top cover and the shell often occur. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a battery and an electrical device that can solve the problem of excessive length of the pole tab, over-welding and poor position fixation of the pole tab by adapter welding after the battery cell is welded with an adapter and inserted into a shell.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A battery comprising:

[0008] A battery cell, wherein the battery cell has a lead-out tab;

[0009] A cover plate, provided with a first opening along a first direction;

[0010] A second insulating member covers the surface of the cover plate facing the battery cell along the first direction; a second opening is provided at a position of the second insulating layer corresponding to the first opening along the first direction;

[0011] A pole, the cover plate is provided with the pole, and the first opening exposes at least a part of the pole;

[0012] A pressing piece, the pressing piece is connected to the second insulating piece, and the pressing piece can rotate relative to the second insulating piece so that the pressing piece has a first state in which the pressing piece is limited within the second opening and the first opening and a second state in which the pressing piece is detached from the second opening and the first opening; when the pressing piece is in the first state, part of the pole ear extends between the pressing piece and the pole, and the projections of the pressing piece, the pole ear and the pole along the first direction at least partially overlap to form a welding area.

[0013] Optionally, in the above-mentioned battery, the pressing member includes a pressing sheet and a first insulating member connected to the pressing sheet, the first insulating member covers at least a portion of the circumference of the pressing sheet and allows the pressing sheet to have a first exposure area on the side facing the pole and a second exposure area on the side away from the pole, and the projections of the first exposure area and the second exposure area along the first direction at least partially overlap.

[0014] Optionally, in the above battery, a welding spot portion is protruding on the first exposure area in the direction of the pole, and the welding spot portion is located in a region overlapping with projections of the first exposure area and the second exposure area.

[0015] Optionally, in the above battery, the inner wall of the second opening along the second direction is set to be an oblique line or an outward convex arc line, and the outer wall of the first insulating member along the second direction is set to be an oblique line or an outward convex arc line consistent with the inner wall of the second opening.

[0016] Optionally, the above-mentioned battery further includes a third insulating member, one end of which is connected to one side of the second insulating member along a third direction, the third insulating member can be flipped relative to the second insulating member, and the other end of the third insulating member extends toward the pressing member and covers the second exposed area of ​​the pressing member on the side away from the pole.

[0017] Optionally, in the above battery, the pressing member is connected to a periphery of the second opening of the second insulating member, and the pressing member is rotatable relative to the second insulating member.

[0018] Optionally, in the above battery, the rotation axis about which the pressing member rotates relative to the second insulating member is the same as the rotation axis about which the third insulating member flips over the second insulating member; the pressing member and the third insulating member can rotate around the rotation axis respectively.

[0019] Optionally, the above battery further comprises a fourth insulating member, one end of the fourth insulating member is connected to one side of the second insulating member along the third direction, and the fourth insulating member can be flipped relative to the second insulating member; the other end of the fourth insulating member extends toward the second opening;

[0020] The fourth insulating member is connected to the pressing member, and the pressing member is located on a side of the fourth insulating member facing the second opening; so that the fourth insulating member drives the pressing member to have a first state limited within the second opening and the first opening and a second state separated from the second opening and the first opening;

[0021] in,

[0022] The fourth insulating member is provided with a third opening, and the side of the pressing member along the first direction away from the pole is arranged corresponding to the third opening. The size of the third opening at least exposes the second exposed area of ​​the pressing member, and the side of the pressing member with the first exposed area is arranged toward the second opening.

[0023] Optionally, in the above-mentioned battery, along the third direction, the size of the third opening is larger than the size of the pressing piece, the pressing piece is slidably connected to the inner wall of the third opening on both sides along the second direction, and the side of the pressing piece having the first exposure area is arranged toward the second opening.

[0024] An electrical device comprises the above-mentioned battery.

[0025] It can be seen from the above technical scheme that the present invention can reduce the manufacturing cost of the adapter using ultrasonic welding and laser welding; the first opening and the second opening for accommodating the pole and the pressure piece are provided on the cover plate and the second insulating member, which is convenient for fixing the position of the pole and the pressure piece, and the pole ear is placed between the pole and the pressure piece. At the same time, the first opening and the second opening reserve space for the placement of the pole ear, which can control the problems of pole ear bulging and inverted insertion caused by the battery cell assembling, and reduce the occurrence of safety problems such as battery cell short circuit caused by the pole ear and the adapter. At the same time, since the pole ear and the pressure piece are accommodated in the first opening and the second opening, the gap formed by the welding of the top cover and the battery cell can be reduced, the energy density of the battery can be improved, and the cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of the cover plate assembly provided in the first embodiment of the present invention Figure 1 ;

[0028] Figure 2 A schematic diagram of the structure of the cover plate assembly provided in the first embodiment of the present invention Figure 2 ;

[0029] Figure 3 A schematic diagram of the structure of the pressing member provided in the embodiment of the present invention Figure 1 ;

[0030] Figure 4 A schematic diagram of the structure of the pressing member provided in the embodiment of the present invention Figure 2 ;

[0031] Figure 5 A schematic diagram of the structure of the cover plate assembly provided in the second embodiment of the present invention Figure 1 ;

[0032] Figure 6 A schematic diagram of the structure of the cover plate assembly provided in the second embodiment of the present invention Figure 2 ;

[0033] Figure 7 A schematic diagram of the structure of a cover plate assembly provided in Embodiment 3 of the present invention;

[0034] Figure 8 A schematic diagram of the structure of a battery provided in Embodiment 3 of the present invention;

[0035] Fig. 9 Schematic diagram of the structure of the second insulating layer and the pressing member provided in the fourth embodiment of the present invention Figure 1 ;

[0036] Fig.10 Schematic diagram of the structure of the second insulating layer and the pressing member provided in the fourth embodiment of the present invention Figure 2 .

[0037] in:

[0038] 1. Battery cell; 2. Tab;

[0039] 31. Cover plate; 311. Second insulating member; 312. Third insulating member; 313. Fourth insulating member; 3131. Third opening;

[0040] 32, pressing piece; 321, pressing sheet; 3211, first exposed area; 3212, second exposed area; 322, first insulating piece;

[0041] 33. First opening; 4. Pole; 5. Welding point. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the invention, it should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply 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 limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0044] Example 1

[0045] like Figures 1 to 4 As shown, an embodiment of the present invention provides a battery that can solve the problem that after the adapter plate of the battery cell 1 is welded and inserted into the shell, the length of the pole tab 2 is too long, and the position of the pole tab 2 is poorly fixed due to over-welding and adapter plate welding.

[0046] First, the battery includes a battery cell 1, a cover plate 31, a second insulating member 311, a pole 4 and a pressing member 32, wherein the battery cell 1 has a pole ear 2; the cover plate 31 is provided with a first opening 33 along a first direction; the second insulating member 311 covers the surface of the cover plate 31 facing the battery cell 1 along the first direction; a second opening is provided at a position of the second insulating layer corresponding to the first opening 33 along the first direction; a pole 4 is provided on the cover plate 31, and the first opening 33 exposes at least a part of the pole 4; the pressing member 32 is connected to the second insulating member 311, and the pressing member 32 can rotate relative to the second insulating member 311, but is not limited to this, the pressing member 32 can also be connected to the cover plate 31, and the pressing member 32 can rotate relative to the cover plate 31, but at the connection position of the pressing plate and the cover plate 31 It is necessary to set up an insulating component in addition to the second insulating member 311, so that the pressing piece 32 has a first state limited to the second opening and the first opening 33 and a second state separated from the second opening and the first opening 33. When the exposed area of ​​the pole 4 is located in the first opening 33, the pressing piece 32 is limited to the second opening and the first opening 33 along the first direction; but not limited to this, when the exposed area of ​​the pole 4 extends out of the first opening 33 and is located in the first opening 33 or is located at the contact position between the first opening 33 and the second opening, the pressing piece 32 is limited to the second opening along the first direction; when the pressing piece 32 is in the first state, part of the pole lug 2 extends between the pressing piece 32 and the pole 4, and the projections of the pressing piece 32, the pole lug 2 and the pole 4 along the first direction at least partially overlap to form a welding area. It should be noted that the first direction is the thickness direction of the cover plate 31. The first direction and the second direction and the third direction mentioned later are detailed in FIG. Figure 2The rotatable connection between the pressing piece 32 and the second insulating piece 311 or the cover plate 31 can be that the pressing piece 32 is fixed on the second insulating piece 311 or the cover plate 31 through a hinge-like structure, and can move in a fixed direction and angle, so as to achieve the accuracy of the welding position and the precision of the welding to facilitate the welding of the pressing piece 321 with the pole lug 2 and the pole 4. However, it is not limited to this. The specific structure of the connection between the pressing piece 32 and the second insulating piece 311 or the connection between the pressing piece 32 and the cover plate 31 can be any structure as long as the rotation between the two connected parts can be achieved. Those skilled in the art can make specific designs according to actual needs.

[0047] It can be seen that the battery provided by the embodiment of the present invention can reduce the manufacturing cost of the adapter using ultrasonic welding and laser welding; the first opening 33 and the second opening for accommodating the pole 4 and the pressure piece 32 are provided on the cover plate 31 and the second insulating member 311, which are convenient for fixing the position of the pole 4 and the pressure piece 32, and the pole lug 2 is placed between the pole 4 and the pressure piece 32. At the same time, the first opening 33 and the second opening reserve space for the placement of the pole lug 2, and the space can control the problems of the pole lug 2 bulging and inverted insertion caused by the battery cell 1 being closed, thereby reducing the occurrence of safety problems such as short circuit of the battery cell 1 caused by the pole lug 2 and the adapter. At the same time, since the pole lug 2 and the pressure piece 32 are accommodated in the first opening 33 and the second opening, the gap formed by the welding of the top cover and the battery cell 1 can be reduced, the energy density of the battery can be improved, and the cost can be reduced.

[0048] For specific implementation, see Figure 3The pressing piece 32 includes a pressing sheet 321 and a first insulating piece 322 connected to the pressing sheet 321. The first insulating piece 322 covers at least part of the circumference of the pressing sheet 321, and allows the pressing sheet 321 to have a first exposed area 3211 on the side facing the pole 4 and a second exposed area 3212 on the side away from the pole 4. The projections of the first exposed area 3211 and the second exposed area 3212 along the first direction at least partially overlap, ensuring that the pole 4 can be electrically connected to the pole lug 2 through the pressing sheet 321. The welding area formed by the at least partial overlap of the projections of the pressing piece 32, the pole lug 2 and the pole 4 along the first direction is designed according to the shape of the pole lug 2 (to ensure that the size of the pole lug 2 along the third direction is covered, and the structure formed by the first insulating piece 322 controls and fixes the pole lug 2 in the second opening to prevent the pole lug 2 from being short-circuited with the top cover, the battery cell 1, etc.), and is adjusted to a square structure. At the same time, the second opening of the second insulating piece 311 matches the shape of the pole 4 to facilitate the fixation of the pressing piece 321. The surface of the pressing piece 321 is coated by the first insulating member 322 to form a step between the pressing piece 321 and the first insulating member 322. The sum of the thickness of the pressing piece 321, the thickness of the first insulating member 322 at the welding area, and the thickness of the tab 2 is equal to the sum of the thickness of the second insulating member 311 and the thickness of the first insulating member 322 at the step formed by the pressing piece 321 and the first insulating member 322, ensuring that the surface of the pressing piece 32 is flush with the surface of the first insulating member 322 in the direction close to the battery cell 1, and the pressing piece 32 can It can be embedded in the second opening of the second insulating member 311; after the battery cell 1 pole ear 2 and the top cover are welded, the pole ear 2 and the pressing sheet 321 are completely covered by the second insulating member 311 and the first insulating member 322, which can prevent the pole ear 2 from being inserted into the battery cell 1 too long to form a short circuit, and avoid short circuits between the pressing sheet 321 and the battery cell 1, the pressing sheet 321 and the top cover, and the pressing sheet 321 and the pole ear 2 on the opposite side, thereby improving the safety of the battery cell 1 after the top cover is welded; at the same time, the entire welding process is under the control of the insulating member, reducing welding spatter caused by violent reactions during the welding process. It should be noted that, see Figure 1 The two sides of the pressing sheet 321 along the second direction are covered by insulating members, and the two sides of the pressing sheet 321 along the third direction are covered by insulating members, which can better improve the safety of the top cover of the battery cell 1 after welding.

[0049] For specific implementation, see Figure 4, a welding spot portion 5 is protruded on the first exposed area 3211 in the direction of the pole 4, and the welding spot portion 5 is located in the area where the projections of the first exposed area 3211 and the second exposed area 3212 overlap. The number of welding spots of the welding spot portion 5 includes but is not limited to three. The structure of the welding welding spot can adjust the size, height and distribution distance of the welding spot according to the thickness of the pole tab 2 and the valve size of the pole tab 2 (it can be designed according to different products, and the size of the positive and negative pole tabs 2 of different models of battery cells 1, the spacing of the pole tabs 2, the number of pole tabs 2 and the difference in the welding distance of the pole tab 2 caused by the thickness of the battery cell 1 require the size of the pressing sheet 321 to be adjusted accordingly), so as to improve the welding penetration and adaptability of the multi-layer pole tab 2. There are three welding points and they are evenly arranged along the third direction (the welding contact points on the pressure piece 32 use slightly raised metal welding points, which can improve the weldability of the welding process, reduce welding time, increase the resistance heat and welding penetration of the welding contact, and meet the welding requirements of multiple tabs 2), so that the welding force of the tab 2 is uniform and the welding strength is sufficient to meet the stability of the welding area after welding; and in combination with resistance welding, the area of ​​the entire welding area is increased to ensure the demand for fast charging on the flow area.

[0050] In specific implementation, the inner wall of the second opening along the second direction is set to be an oblique line type or an outward convex arc line type, and the outer wall of the first insulating member 322 along the second direction is set to be an oblique line type or an outward convex arc line type consistent with the inner wall of the second opening. The purpose is to optimize the structure of the direct contact angle between the edge of the second opening of the second insulating member 311 and the pole lug 2, and optimize it to a slope angle to reduce the cutting of the pole lug 2 by the sharp corner, thereby ensuring the integrity of the pole lug 2. The outer wall of the corresponding first insulating member 322 of the pressing member 32 along the second direction is set to a slope angle, which can achieve the purpose of pressing and fixing the middle part of the pole lug 2 after welding, and reduce the safety risks caused by the excessive protrusion of the pole lug 2. It should be noted that the line type of the inner wall of the second opening along the second direction can form a slope angle, and the specific line type can be specifically designed by those skilled in the art according to actual needs.

[0051] An embodiment of the present invention provides an electrical device, comprising the above-mentioned battery.

[0052] The electrical device of the present invention is not particularly limited, and may include but is not limited to: laptop computers, pen-input computers, mobile computers, e-book players, portable phones, portable fax machines, portable copiers, portable printers, head-mounted stereo headphones, video recorders, LCD televisions, portable cleaners, portable CD players, mini CDs, transceivers, electronic notepads, calculators, memory cards, portable recorders, radios, backup power supplies, motors, cars, motorcycles, power-assisted bicycles, bicycles, lighting fixtures, toys, game consoles, clocks, power tools, flashlights, cameras, large household batteries and lithium-ion capacitors, etc.

[0053] Example 2

[0054] like Figure 5 and Figure 6 As shown, the second embodiment of the present invention provides a battery and an electric device. The difference between the second embodiment of the present invention and the first embodiment is that:

[0055] In a specific implementation, it also includes a third insulating member 312, one end of the third insulating member 312 is connected to one side of the second insulating member 311 along the third direction, the third insulating member 312 can be flipped relative to the second insulating member 311, and the other end of the third insulating member 312 extends toward the pressing member 32 and covers the second exposed area 3212 of the pressing member 32 away from the pole 4, that is, along the second direction, the size of the third insulating member 312 is smaller than the size of the second exposed area 3212 of the pressing piece 321, and after welding, the third insulating member 312 can press the pressing piece 321 downward, replacing the role of the weld mark protective glue. And along the first direction, the size of the third insulating member 312 is equal to the protruding size of the first insulating member 322 wrapped around the pressing piece 321 along the first direction, so that after the third insulating member 312 is pressed down and fixed, the overall combined height still satisfies: the sum of the thickness of the pressing piece 321, the thickness of the first insulating member 322 at the location of the welding area, and the thickness of the pole ear 2 is equal to the sum of the thickness of the second insulating member 311 and the thickness of the first insulating member 322 at the step position formed by the pressing piece 321 and the first insulating member 322, and the thickness of the third insulating member 312 is embedded in the thickness of the pressing piece 32. At this time, the two side edges of the pressing piece 321 along the second direction are covered by the insulating member, and the two side edges of the pressing piece 321 along the third direction are not covered, so that the third insulating member 312 can cover the pressing piece 321.

[0056] For specific implementation, see Figure 5 The pressing piece 32 is connected to the periphery of the second opening of the second insulating piece 311 , and the pressing piece 32 can rotate relative to the second insulating piece 311 .

[0057] In a specific implementation, the rotation axis of the pressing member 32 that can rotate relative to the second insulating member 311 is the same as the rotation axis of the third insulating member 312 and the second insulating member 311; the pressing member 32 and the third insulating member 312 can rotate around the rotation axis respectively. At this time, the pressing member 32 can be connected to the second insulating member 311, and the pressing member 32 is located at the connection position between the first insulating member 322 and the second insulating member 311. However, it is not limited to this, the pressing member 32 can also be connected to the third insulating member 312, and the rotation axis of the third insulating member 312 is set parallel to the rotation axis of the pressing member 32, that is, the pressing member 32 can rotate relative to the third insulating member 312, and the third insulating member 312 is flipped relative to the second insulating member 311.

[0058] In a specific implementation, the third insulating member 312 can also protect the sealing pins from spattering during welding, thereby reducing the risk of foreign matter generated by welding entering the battery cell 1 and causing short circuits and other safety risks.

[0059] Example 3

[0060] like Figure 7 and Figure 8 As shown, the third embodiment of the present invention provides a battery and an electric device. The difference between the third embodiment of the present invention and the first embodiment is that:

[0061] In a specific implementation, it also includes a fourth insulating member 313, one end of the fourth insulating member 313 is connected to one side of the second insulating member 311 along the third direction, and the fourth insulating member 313 can be flipped relative to the second insulating member 311; the other end of the fourth insulating member 313 extends toward the second opening; the fourth insulating member 313 is connected to the pressing member 32, and the pressing member 32 is located on the side of the fourth insulating member 313 facing the second opening; so that the fourth insulating member 313 drives the pressing member 32 to have a first state limited in the second opening and the first opening 33 and a second state detached from the second opening and the first opening 33; wherein the fourth insulating member 313 is provided with a third opening 3131, and the side of the pressing member 32 away from the pole 4 along the first direction is correspondingly arranged with the third opening 3131, the size of the third opening 3131 at least exposes the second exposed area 3212 of the pressing member 32, and the side of the pressing member 32 provided with the first exposed area 3211 is arranged toward the second opening. It should be noted that the first insulating member 322 and the fourth insulating member 313 of the pressing member 32 can be integrally arranged, and in this case, the surface of the pressing piece 321 can be the pressing piece 32 formed by coating with the fourth insulating member 313. The fourth insulating member 313 and the second insulating member 311 after welding cover the pressing piece 321, the pole lug 2 and the pole 4 after welding, and the step structure formed by the second opening and the first insulating member 322 covering the pressing piece 321 protruding along the first direction is combined to protect the welding area, thereby preventing the pole lug 2 from being inserted too long and short-circuiting the battery cell 1 after welding, and preventing the fourth insulating member 313 and the battery cell 1, the fourth insulating member 313 and the top cover, and the fourth insulating member 313 and the pole lug 2 on the opposite side from being short-circuited, thereby improving the safety of the top cover of the battery cell 1 after welding; at the same time, the entire welding process is controlled by the insulating member, reducing the welding spatter caused by the violent reaction during the welding process.

[0062] Example 4

[0063] like Fig. 9 and Fig.10 As shown, the fourth embodiment of the present invention provides a battery and an electric device. The difference between the fourth embodiment of the present invention and the third embodiment is that:

[0064] In specific implementation, along the third direction, the size of the third opening 3131 is larger than the size of the pressing piece 32, and the pressing piece 32 is slidably connected to the inner wall of the third opening 3131 on both sides along the second direction, and the side of the pressing piece 32 provided with the first exposed area 3211 is arranged toward the second opening. A suitable number and length of pressing pieces 321 can be selected according to the number of tabs 2, so that the corresponding size of the pressing piece 321 can be adjusted according to the size of the tabs 2 and the pole 4, and the position can be changed in the slide slot to meet the needs of rapid adjustment.

[0065] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0066] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0067] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery, characterized in that: include: A battery cell (1), wherein the battery cell (1) has a lead-out tab (2); A cover plate (31) having a first opening (33) arranged along a first direction; a second insulating member (311) covering the surface of the cover plate (31) facing the battery core (1) along the first direction; a second opening is provided along the first direction at a position of the second insulating layer (311) corresponding to the first opening (33); A pole (4), the pole (4) being arranged on the cover plate (31), the first opening (33) exposing at least a part of the pole (4); A pressing piece (32), the pressing piece (32) being connected to the second insulating piece (311), and the pressing piece (32) being rotatable relative to the second insulating piece (311), so that the pressing piece (32) has a first state in which the pressing piece (32) is limited within the second opening and the first opening (33), and a second state in which the pressing piece (32) is separated from the second opening and the first opening (33); when the pressing piece (32) is in the first state, a portion of the pole lug (2) extends between the pressing piece (32) and the pole (4), and projections of the pressing piece (32), the pole lug (2) and the pole (4) along the first direction at least partially overlap to form a welding area.

2. The battery according to claim 1, characterized in that The pressing piece (32) comprises a pressing sheet (321) and a first insulating piece (322) connected to the pressing sheet (321); the first insulating piece (322) covers at least a portion of the circumference of the pressing sheet (321) and allows the pressing sheet (321) to have a first exposed area (3211) on a side facing the pole (4) and a second exposed area (3212) on a side facing away from the pole (4); the projections of the first exposed area (3211) and the second exposed area (3212) along the first direction at least partially overlap.

3. The battery according to claim 2, characterized in that A welding point portion (5) is provided on the first exposed area (3211) protruding in the direction of the pole (4), and the welding point portion (5) is located in an area overlapping with the projections of the first exposed area (3211) and the second exposed area (3212).

4. The battery according to claim 2, characterized in that The inner wall of the second opening along the second direction is configured as an oblique line or an outwardly convex arc line, and the outer wall of the first insulating member (322) along the second direction is configured as an oblique line or an outwardly convex arc line consistent with the inner wall of the second opening.

5. The battery according to any one of claims 1 to 4, characterized in that: It also includes a third insulating member (312), one end of which is connected to one side of the second insulating member (311) along a third direction, the third insulating member (312) is flippable relative to the second insulating member (311), and the other end of the third insulating member (312) extends toward the pressing member (32) and covers a second exposed area (3212) of the pressing member (32) on a side facing away from the pole (4).

6. The battery according to claim 5, characterized in that The pressing piece (32) is connected to the periphery of the second opening of the second insulating piece (311), and the pressing piece (32) is rotatable relative to the second insulating piece (311).

7. The battery according to claim 5, characterized in that The rotation axis about which the pressing member (32) rotates relative to the second insulating member (311) is the same as the rotation axis about which the third insulating member (312) and the second insulating member (311) flip; the pressing member (32) and the third insulating member (312) can rotate around the rotation axis respectively.

8. The battery according to any one of claims 1 to 4, characterized in that: It also comprises a fourth insulating member (313), one end of the fourth insulating member (313) being connected to one side of the second insulating member (311) along the third direction, and the fourth insulating member (313) being flippable relative to the second insulating member (311); and the other end of the fourth insulating member (313) extending toward the second opening; The fourth insulating member (313) is connected to the pressing member (32), and the pressing member (32) is located on a side of the fourth insulating member (313) facing the second opening; so that the fourth insulating member (313) drives the pressing member (32) to have a first state in which it is limited within the second opening and the first opening (33) and a second state in which it is separated from the second opening and the first opening (33); in, The fourth insulating member (313) is provided with a third opening (3131), and a side of the pressing member (32) that is away from the pole (4) along the first direction is arranged corresponding to the third opening (3131), the size of the third opening (3131) at least allows the second exposed area (3212) of the pressing member (32) to be exposed, and a side of the pressing member (32) that is provided with the first exposed area (3211) is arranged toward the second opening.

9. The battery according to claim 8, characterized in that Along the third direction, the size of the third opening (3131) is larger than the size of the pressing piece (32), the pressing piece (32) is slidably connected to the inner wall of the third opening (3131) on both sides along the second direction, and the side of the pressing piece (32) provided with the first exposed area (3211) is arranged toward the second opening.

10. An electrical device, characterized in that: A battery comprising any one of claims 1 to 9.

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