Adapter, battery and electric device

Abstract

The utility model discloses an adapter which comprises a pole connecting part, a tab connecting part and a transition part, and the pole connecting part is used for connecting a pole; the tab connecting part is used for connecting tabs, and the thickness of the tab connecting part is greater than that of the pole connecting part; the transition part is used for connecting the pole connecting part and the tab connecting part, an included angle alpha is formed between the pole connecting part and the transition part, and the included angle alpha is larger than or equal to 135 degrees and smaller than 180 degrees. Therefore, the thickness of the pole connecting part of the adapter is smaller than that of the tab connecting part, and compared with the condition that the thickness of the pole connecting part is larger, the thickness of the pole connecting part is smaller, so that the melting penetrability of the welding part of the pole connecting part is better, the welding power can be reduced, and the conditions of plastic hot melting or fire and the like can be prevented; and meanwhile, the welding effect and the reliability between the adapter and the pole can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery field, concretely relates to a switching piece, set up the battery of the switching piece and the electric device of setting up the battery. BACKGROUND

[0002] With the increase of the importance of environmental protection, electric vehicles rapidly rise in the vehicle industry due to their energy-saving and environmentally-friendly advantages. Electric vehicles use batteries as power supply equipment, and a switching piece is arranged in the battery. The switching piece is used to connect the pole column and the pole ear in the battery. The switching piece plays an important role in the safety and power supply stability of the battery.

[0003] The welding power of the switching piece structure in the battery is different when welding at different positions. The power requirement of the pole column connecting part is relatively strict. Sometimes, the control of the pole column welding power is not good, which may cause plastic hot melting or fire phenomenon.

[0004] Therefore, how to avoid plastic hot melting or fire phenomenon during pole column welding is a technical problem that needs to be solved by those skilled in the art. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims to provide a switching piece that can solve the problem of plastic hot melting or fire during pole column welding.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A switching piece comprises:

[0008] A pole column connecting part is used to connect the pole column.

[0009] A pole ear connecting part is used to connect the pole ear. The thickness of the pole ear connecting part is greater than the thickness of the pole column connecting part.

[0010] A transition part is used to connect the pole column connecting part and the pole ear connecting part. An included angle α is formed between the pole column connecting part and the transition part. The included angle α satisfies: 135°≤α<180°.

[0011] Optionally, in the above-mentioned switching piece, the switching piece comprises a first side surface and a second side surface arranged oppositely along the thickness direction.

[0012] The pole column comprises a first surface and a second surface arranged oppositely along the thickness direction. The first surface connects the first side surface of the pole column connecting part.

[0013] In the thickness direction, a first distance between the first side of the post connecting portion and the second surface is greater than a second distance between the first side of the tab connecting portion and the second surface.

[0014] Optionally, in the adapter described above, the post connecting portion is provided with a post welding area, and a roughness of the second side of the post connecting portion at least in the post welding area is greater than a roughness of the first side of the post connecting portion.

[0015] Optionally, in the adapter described above, in the first direction, a size of the post connecting portion is less than a size of the tab connecting portion.

[0016] Optionally, in the adapter described above, the tab connecting portion is provided with a tab welding area, in the first direction, the tab connecting portion includes oppositely arranged first edges, the post connecting portion includes oppositely arranged second edges, and the tab welding area includes oppositely arranged third edges; a minimum distance from the third edges to the first edges is a, a minimum distance from the second edges to the first edges is b, and a≥b.

[0017] Optionally, in the adapter described above, a≤4mm; and / or, b≥2mm.

[0018] Optionally, in the adapter described above, in the second direction, a chamfer is arranged at a connection between the transition portion and the tab connecting portion;

[0019] and / or, in the second direction, a chamfer is arranged at a connection between the transition portion and the post connecting portion;

[0020] and / or, a thickness of the transition portion is less than a thickness of the tab connecting portion.

[0021] A battery includes a post, a tab, and the adapter described above, the post connecting portion of the adapter is connected to the post, and the tab connecting portion is connected to the tab.

[0022] Optionally, in the battery described above, an end of the tab close to the post connecting portion is not more than an end of the transition portion close to the post connecting portion.

[0023] A power utilization device includes the battery described above.

[0024] From the above technical scheme can be seen, the thickness of the pole post connecting portion is less than the thickness of the tab connecting portion, compared to the case that the thickness of the pole post connecting portion is larger, the smaller thickness can make the welding position of the pole post connecting portion have better melting penetration, in the case that there is no virtual welding between the pole post connecting portion of the adapter and the pole post, the welding power can be reduced, the occurrence of plastic hot melting or fire and other conditions can be prevented, at the same time, the welding effect and the reliability between the adapter and the pole post can be ensured, and the stability and reliability between the adapter and the pole plate where the pole post is located can also be ensured, thereby improving the stability and safety of the battery monomer. Generally, the adapter is a plate material, and the pole post connecting area of the plate material is stamped to achieve the purpose of reducing the thickness of the pole post connecting area, but during the stamping process, the excess material of the pole post connecting portion will accumulate to the tab connecting portion, and the included angle between the pole post connecting portion and the transition portion is greater than or equal to 135° and less than 180°, which can ensure the flatness of the surface of the tab connecting portion, and can avoid the situation that the accumulated material in the tab connecting portion is uneven when the angle is relatively small, resulting in virtual welding or uneven pressing of the welding slag during welding. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0026] Figure 1 The structure diagram of the adapter provided by the embodiment of the present application is shown in the figure.

[0027] Figure 2 The A-A cross section of the adapter provided by the embodiment of the present application is shown in the figure. Figure 1 ;

[0028] Figure 3 The local enlarged view of Figure 2 is shown in the figure.

[0029] Figure 4 The A-A cross section of the adapter provided by the embodiment of the present application is shown in the figure. Figure 2 ;

[0030] Figure 5 The local enlarged view of Figure 4 is shown in the figure.

[0031] Figure 6a The structure diagram of the adapter provided by the embodiment of the present application is shown in the figure.

[0032] Figure 6bThe structure schematic view of the adapter provided by the embodiment of the utility model along one side of the first direction is provided with a welding area.

[0033] Figure 7 The structure schematic view of the adapter provided by the embodiment of the utility model is connected with the tab.

[0034] Among them:

[0035] 1, pole column connecting part;11, second edge;2, tab connecting part;21, first edge;3, transition part;4, tab welding area;41, third edge;5, tab;6, first side;7, second side. Specific implementation

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0037] In the description of the utility model, it should be pointed out that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is placed, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] As Figures 1 to 7 The utility model embodiment provides an adapter, which can solve the problem of plastic hot melting or fire during pole column welding.

[0039] Firstly, the adapter comprises a pole column connecting part 1, a tab connecting part 2 and a transition part 3, wherein the pole column connecting part 1 is used for connecting the pole column;The tab connecting part 2 is used for connecting the tab 5, and the thickness of the tab connecting part 2 is greater than the thickness of the pole column connecting part 1;The transition part 3 is used for connecting the pole column connecting part 1 and the tab connecting part 2, and an included angle α is formed between the pole column connecting part 1 and the transition part 3, and the included angle α satisfies: 135°≤α<180°.

[0040] Alpha can be any one of 135°, 136°, 137°, 138°, 139°, 140°, 141°, 142°, 143°, 144°, 145°, 146°, 147°, 148°, 149°, 150°, 151°, 152°, 153°, 154°, 155°, 156°, 157°, 158°, 159°, 160°, 161°, 162°, 163°, 164°, 165°, 166°, 167°, 168°, 169°, 170°, 171°, 172°, 173°, 174°, 175°, 176°, 177°, 178°, 179°, or any two therebetween. It can be seen that the thickness of the pole post connecting portion 1 of the adapter is smaller than the thickness of the tab connecting portion 2. Compared with the case where the thickness of the pole post connecting portion 1 is large, the smaller thickness can make the welding position of the pole post connecting portion 1 have better melting penetration. In the case where no false welding occurs between the pole post connecting portion 1 and the pole post of the adapter, the welding power can be reduced, the occurrence of situations such as plastic hot melting or fire can be prevented, the welding effect and the reliability between the adapter and the pole post can be ensured, and the stability and reliability between the adapter and the pole post of the cover plate can also be ensured, thereby improving the stability and safety of the battery monomer. Generally, the adapter is a plate material, and the pole post connecting area 1 of the plate material is stamped to achieve the purpose of reducing the thickness of the pole post connecting area 1. However, during the stamping process, the excess material of the pole post connecting portion 1 will accumulate on the tab connecting portion 2. The angle between the pole post connecting portion 1 and the transition portion 3 is greater than or equal to 135° and less than 180°, which can ensure the flatness of the surface of the tab connecting portion 2 and avoid the situation that the accumulated material on the tab connecting portion 2 is uneven when the angle is relatively small, resulting in false welding or splashing of welding slag caused by uneven pressing of the lower clamp during welding.

[0041] In specific implementation, the adapter includes first and second opposite sides in the thickness direction; the pole post includes first and second opposite surfaces in the thickness direction, and the first surface connects the first side of the pole post connecting portion 1; in the thickness direction, the first distance is greater than the second distance, the first distance being the distance between the first side of the pole post connecting portion 1 and the second surface, and the second distance being the distance between the first side of the tab connecting portion 2 and the second surface. That is, in the thickness direction of the adapter and the positive direction from the inside to the outside of the battery, the plane where the first side of the pole post connecting portion 1 is located is lower than the plane where the first side of the tab connecting portion 2 is located. At this time, the first side of the pole post connecting portion 1 and the first side of the tab connecting portion 2 are connected through the transition portion 3, forming an angle alpha, which facilitates the arrangement and installation of the tabs, the adapter, and other cover plate components in the battery. Figure 4Or, the plane where the second side of the pole post connecting part 1 is located is higher than the plane where the second side of the tab connecting part 2 is located, see details Figure 2 At this time, the included angle of the second side of the pole post connecting part 1 and the second side of the tab connecting part 2 formed by the transition part 3 is α, and it should be noted that the angle of the α angle of the first side and the α angle of the second side can be the same or different.

[0042] In specific implementation, the pole post connecting part 1 is provided with a pole post welding area, and the roughness of the second side of the pole post connecting part 1 at least in the pole post welding area is greater than the roughness of the first side of the pole post connecting part 1, which is conducive to improving the welding effect. Especially for laser welding, the rough surface of the pole post welding area can absorb laser energy during welding, reduce the degree of light return during laser welding, prolong the service life of the welding lens, reduce the power during laser welding, and reduce production costs. At the same time, it can also avoid the appearance of welding slag, improve the welding effect, prevent internal short circuit of the battery monomer, and further improve the safety performance and quality of the battery. It should be noted that the roughness of the second side of the pole post connecting part 1 at least in the pole post welding area can be increased in various ways. For example, a rough surface can be formed on the second side of the pole post connecting part 1 at least in the pole post welding area by sanding, sandblasting, or solvent etching or embossing, but it is not limited thereto. The specific forming method of the rough surface can be designed according to actual needs by those skilled in the art. In addition, the thickness of the component provided with the rough surface is thinned to a certain extent due to the formation of the rough surface, which plays a role in appropriately thinning the adapter and provides a progress space for process improvement.

[0043] In specific implementation, in the first direction, the size of the pole post connecting part 1 is smaller than the size of the tab connecting part 2, which provides sufficient connection position for the connection of the tab 5, and at the same time meets the pole post connection area, so that the size of the adapter is smaller, which is convenient for arrangement, reduces the self-weight, and saves the cost. In the second direction, the pole post connecting part 1 can be connected with the tab connecting part 2 in full size, in which case the pole post connecting part 1 can be flush with the tab connecting part 2 along one side and not flush along the other side. Exemplarily, the adapter has a first side 6 and a second side 7 along the first direction, and along the first direction, the second edge 11 close to the first side 6 is flush with the first edge 21 close to the first side 6, and the first edge 21 close to the second side 7 protrudes from the second edge 11 close to the second side 7 (not shown in the figure). Or, see details Figure 1 and Figure 6a and Figure 6bThe pole post connector 1 and the tab connector 2 are not flush on either side along the second direction. Specifically, along the first direction, the first edge 21 near the first side 6 protrudes beyond the second edge 11 near the first side 6, and the first edge 21 near the second side 7 protrudes beyond the second edge 11 near the second side 7. The specific arrangement of the pole post connector 1 and the tab connector 2 can be designed by those skilled in the art according to actual needs. It should be noted that detailed schematics of the first and second directions are provided in [reference needed]. Figure 1 .

[0044] For specific implementation details, please refer to [link / reference]. Figure 6a and Figure 6b The electrode connecting part 2 is provided with an electrode welding area 4. Along the first direction, the electrode connecting part 2 includes a first edge 21 disposed opposite to each other, the electrode post connecting part 1 includes a second edge 11 disposed opposite to each other, and the electrode welding area 4 includes a third edge 41 disposed opposite to each other. The minimum distance from the third edge 41 to the first edge 21 is a, and the minimum distance from the second edge 11 to the first edge 21 is b, where a ≥ b. The two sides of the adapter along the first direction are a first side 6 and a second side 7, respectively. See details... Figure 6a When a dual-cell battery is used, the distance from the third edge 41 near the first side 6 to the first edge 21 near the first side 6 is not less than the distance from the second edge 11 near the first side 6 to the first edge 21 near the first side 6, and the distance from the third edge 41 near the second side 7 to the first edge 21 near the second side 7 is not less than the distance from the second edge 11 near the second side 7 to the first edge 21 near the second side 7; see details. Figure 6b When a battery cell is installed in the battery, the side closest to the first side 6 (the side where the tab connects to the cell in the first direction, i.e.) Figure 6b In the embodiment, the distance from the third edge 41 of the upper side (the first edge 6) to the first edge 21 near the first side 6 is a, and the distance from the second edge 11 near the first side 6 to the first edge 21 near the first side 6 is b. When the side where the tab is connected to the battery cell is the second side 7 (not shown in the figure), the distance from the third edge 41 near the second side 7 to the first edge 21 near the second side 7 is a, and the distance from the second edge 11 near the second side 7 to the first edge 21 near the second side 7 is b. It should be noted that the "distance" here refers to the vertical distance in the first direction. This setting can be used to position the tab solder mark. Specifically, when the tab 5 is soldered, the soldering position of the tab 5 is located in the area formed by the pole post connection part 1 in the first direction, that is, the tab soldering area 4 is located in the area formed by the pole post connection part 1 in the first direction. This ensures that the edge of the tab soldering area 4 is a certain distance from the edge of the tab connection part 2 in the first direction, preventing the tab 5 from being scratched by the edge of the tab connection part 2.

[0045] In specific implementation, a≤4mm, which can avoid the situation that the welding head is too far from the root of the tab 5, the tab 5 cannot be controlled, the tab 5 has too much redundancy, the tab 5 is arched and too high, the tab 5 occupies more battery space, and the tab 5 is bent, wrinkled, and inserted upside down; and / or, b≥2mm, which can avoid the situation that the welding head is too close to the root of the tab 5, the welding mark is not completely located in the tab connecting part 2, and the welding mark is not complete; and can avoid the situation that the tab welding area 4 is too close to the folding area of the root of the tab 5, and the tab 5 is damaged. In addition, in the case of a single winding core in the battery, when the welding head is too close to the root of the tab 5, the stress point of the adapter during the welding process is too close to the root, which can cause the other end (i.e., the end of the adapter away from the tab 5) to be easily raised or even folded, which can affect the welding rate and cause the welding head to be damaged.

[0046] In specific implementation, along the second direction, a chamfer is arranged at the connection between the transition part 3 and the tab connecting part 2; and / or, along the second direction, a chamfer is arranged at the connection between the transition part 3 and the tab connecting part 1. The arrangement of the chamfer can avoid stress concentration at the connection of the adapter, and in addition, the arrangement of the chamfer at the connection between the transition part 3 and the tab connecting part 2 can also avoid the situation that the tab 5 is scratched by the burr of the transition part 3 when the tab 5 is in contact with the transition part 3 due to misalignment of the tab 5. It should be noted that when the chamfer approaches a horizontal angle, the situation that the tab 5 is scratched can be more effectively avoided. In some embodiments, the thickness of the transition part 3 is less than the thickness of the tab connecting part 2, which can make the transition part 3 play a better transition role. It should be noted that the thickness of the transition part 3 is the average thickness of the transition part 3. The thickness of the end of the transition part 3 connected to the tab connecting part 1 is the same as the thickness of the tab connecting part 1, and the thickness of the end of the transition part 3 connected to the tab connecting part 2 is the same as the thickness of the tab connecting part 2, which can make the connection between the three more smooth and avoid the situation that the tab 5 is scratched when there is a step or a right angle or an acute angle at the connection site.

[0047] The utility model embodiment provides a kind of battery, including pole, tab 5 and above-mentioned adapter, the pole connecting part 1 of adapter connects pole, and tab connecting part 2 connects tab 5.It should be noted that it can also include cover plate and insulating piece etc., the specific structural member of battery, and field technician can adjust according to actual situation.

[0048] It can be seen that the thickness of the pole post connecting portion 1 of the battery is smaller than the thickness of the tab connecting portion 2, compared with the case that the thickness of the pole post connecting portion 1 is larger, the smaller thickness can make the melting penetration of the welding position of the pole post connecting portion 1 better, in the case that there is no virtual welding between the pole post connecting portion 1 of the adapter and the pole post, the welding power can be reduced, the occurrence of the situation such as plastic hot melting or fire can be prevented, at the same time, the welding effect and the reliability between the adapter and the pole post can be ensured, and the stability and safety of the battery monomer can be ensured, and the stability and safety of the battery monomer are improved. Generally, the adapter is a plate material, the pole post connecting area 1 of the plate material is stamped to achieve the purpose of reducing the thickness of the pole post connecting area 1, but during the stamping process, the excess material of the pole post connecting portion 1 will accumulate to the tab connecting portion 2, and the included angle between the pole post connecting portion 1 and the transition portion 3 is greater than or equal to 135° and less than 180°, which can ensure the flatness of the surface of the tab connecting portion 2, and can avoid the situation that the material accumulated on the tab connecting portion 2 is uneven, resulting in virtual welding or the situation that the welding slag splashes due to uneven pressing of the lower clamp during welding.

[0049] In specific implementation, one end of the tab 5 close to the pole post connecting portion 1 does not exceed one end of the transition portion 3 close to the pole post connecting portion 1, that is, the distance d between one end of the tab close to the pole post connecting portion 1 and one end of the transition portion 3 close to the pole post connecting portion 1 in the second direction is greater than 0, and details are shown in Figure 7 . The longer the tab 5 is, the greater the flow cross-sectional area is, and the better the current transmission effect is, but when the tab 5 exceeds the transition portion 3, the tab 5 is easy to be directly electrically connected with the pole post, which reduces the stability of the current, and when the transition portion 3 is provided with a fuse structure, the direct electrical connection between the tab 5 and the pole post also makes the current directly pass through the fuse structure, which causes the fuse to fail.

[0050] In specific implementation, after the tab 5 is ultrasonically welded with the adapter, the adapter and the pole post are laser welded. When the pole post welding area of the adapter is welded with the pole post, since the thickness of the pole post welding area is thinner than the thickness of other parts of the adapter, the welding effect can be easily achieved during welding, the penetration and width of the molten metal can be easily met, and the product yield can be ensured without plastic hot melting caused by excessive welding power. It should be noted that the connection form of the tab 5 and the adapter is not limited to ultrasonic welding, and the welding form of the adapter and the pole post is not limited to laser welding.

[0051] The utility model embodiment provides a kind of electric device, including above-mentioned battery.

[0052] The electric device is not particularly limited, and can include but is not limited to: a notebook computer, a pen input type computer, a mobile computer, an electronic book player, a portable telephone, a portable facsimile machine, a portable copying machine, a portable printer, a head-mounted stereo headphone, a video recorder, a liquid crystal television, a portable cleaner, a portable CD player, a mini disc, a transceiver, an electronic notepad, a calculator, a memory card, a portable recorder, a radio, a backup power supply, a motor, an automobile, a motorcycle, a power-assisted bicycle, a bicycle, an illuminating appliance, a toy, a game machine, a clock, a power tool, a flash light, a camera, a household large storage battery and a lithium ion capacitor, etc.

[0053] Finally, it should be noted that the terminology used herein, such as first and second, is merely used to differentiate one entity or operation from another entity or operation and does not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by an indefinite article "a" or "an" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0054] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between various embodiments can be referred to each other.

[0055] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application should not be limited to the embodiments shown herein, but should be consistent with the widest scope of principles and novel features disclosed herein.

Claims

1. An adapter, characterized in that The adapter piece comprises: a pole connecting portion (1) for connecting a pole; an ear connecting portion (2) for connecting an ear (5), the ear connecting portion (2) having a thickness greater than that of the pole connecting portion (1); a transition portion (3) for connecting the pole connecting portion (1) and the ear connecting portion (2), the pole connecting portion (1) and the transition portion (3) forming an included angle α, the included angle α satisfying 135°≤α<180°.

2. The adapter of claim 1, wherein, The adapter piece comprises first and second opposite sides in the thickness direction; The pole comprises first and second opposite surfaces in the thickness direction, the first surface connecting the first side of the pole connecting portion (1); In the thickness direction, a first distance between the first side of the pole connecting portion (1) and the second surface is greater than a second distance between the first side of the ear connecting portion (2) and the second surface.

3. The adapter of claim 2, wherein, The pole connecting portion (1) is provided with a pole welding area, the second side of the pole connecting portion (1) in the pole welding area having a roughness greater than that of the first side of the pole connecting portion (1).

4. The adapter of claim 1, wherein, In the first direction, the pole connecting portion (1) has a size smaller than that of the ear connecting portion (2).

5. The adapter of claim 4, wherein, The ear connecting portion (2) is provided with an ear welding area (4), the ear connecting portion (2) comprising first opposite edges (21) in the first direction, the pole connecting portion (1) comprising second opposite edges (11), and the ear welding area (4) comprising third opposite edges (41); the minimum distance from the third edges (41) to the first edges (21) is a, and the minimum distance from the second edges (11) to the first edges (21) is b, a≥b.

6. The adapter of claim 5, wherein, a≤4mm; and / or, b≥2mm.

7. The adapter of any one of claims 1 to 6, wherein, In the second direction, the transition portion (3) is provided with a chamfer at the junction with the ear connecting portion (2); and / or, in the second direction, the transition portion (3) is provided with a chamfer at the junction with the pole connecting portion (1); and / or, the thickness of the transition portion (3) is less than that of the ear connecting portion (2).

8. A battery, characterized by The battery comprises a pole, an ear (5), and an adapter piece as claimed in any one of claims 1 to 7, the pole connecting portion (1) of the adapter piece connecting the pole, and the ear connecting portion (2) connecting the ear (5).

9. The battery of claim 8, wherein, The ear (5) has an end close to the pole connecting portion (1) not exceeding an end of the transition portion (3) close to the pole connecting portion (1).

10. An electrical device, characterized by The battery comprises the battery as claimed in claim 8 or 9.

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