Battery

Abstract

Provided in the present invention is a battery, comprising a housing, a terminal post element, an insulating member, and a battery cell located in the housing, wherein the terminal post element is fixed relative to the housing, the terminal post element is insulated from the housing by means of the insulating member, and the terminal post element comprises a conductive piece and N terminal posts located on the same side of the conductive piece, with N≥2 and the N terminal posts having the same polarity and being of an integrated structure with the conductive piece; the battery cell comprises tabs, and the conductive piece is welded to the tabs, with the welding mark area being S1; the housing is provided with through holes; and each of the terminal posts corresponds to one of the through holes, at least part of the terminal post runs through the corresponding through hole, and the cross-sectional area of the through hole is S2, with 0.04≤(N*S2) / S1≤1.2. The insulating member of the battery does not melt due to welding heat, and the battery, as a whole, has a good overcurrent capability and good electrical connection stability.

Description

A type of battery

[0001] This application claims priority to Chinese Patent Application No. 202411514749.8, filed on October 29, 2024, entitled "A Battery", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and in particular to a battery. Background Technology

[0003] In a typical battery, multiple terminals of the same polarity are welded to an adapter plate, which is then welded to a tab. This type of battery suffers from high resistance and poor overcurrent capacity. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this application provides a battery, including a casing, terminal elements, an insulating component, and a cell located within the casing. The terminal elements are fixed relative to the casing, and the terminal elements and the casing are insulated from each other by the insulating component. Each terminal element includes a conductive sheet and N terminals located on the same side of the conductive sheet, where N ≥ 2. The N terminals have the same polarity and are integrally formed with the conductive sheet. The cell includes tabs, and the conductive sheet is welded to the tabs with a solder area of ​​S1. The casing is provided with through holes, and each terminal corresponds to one through hole. At least a portion of the terminal passes through the corresponding through hole, and the cross-sectional area of ​​the through hole is S2, where 0.04 ≤ (N*S2) / S1 ≤ 1.2.

[0005] The battery provided in this application has an integrated structure for the terminals and conductive sheets, so there is no need to weld them together. If the terminals and conductive sheets are welded, the solder area of ​​the terminals and conductive sheets will be relatively small due to the size of the terminals, resulting in a relatively high solder resistance and poor current carrying capacity, which becomes a bottleneck restricting the overall current carrying capacity of the battery. The present application integrates the terminals and conductive sheets into an integrated structure, thus avoiding the limitation on the overall current carrying capacity of the battery caused by welding the terminals and conductive sheets.

[0006] Furthermore, since the conductive sheet is welded to the tab, and the terminal and the casing are insulated by an insulating component, the welding heat is transferred to the insulating component through the terminal during welding. The sum of the cross-sectional areas of the through holes in the casing through which the terminal is inserted is N*S2, and the welding area of ​​the conductive sheet and the tab is S1. By controlling the ratio of N*S2 to S1 within the range of 0.04 to 1.2, it is possible to avoid the through holes used for inserting the terminal being too small, which would prevent the heat from welding the tab and the conductive sheet from being released quickly, causing the insulating component to melt and affecting the insulation performance between the terminal and the casing. This also ensures that the battery has good overcurrent capacity and good electrical connection stability. At the same time, it can prevent the through holes used for inserting the terminal from being too large, avoiding interference when adjacent terminals are fixed and the occurrence of casing deformation between the two terminals. Attached Figure Description

[0007] Figure 1 is a perspective view of a partial structure of a battery according to an embodiment of this application;

[0008] Figure 2 is a cross-sectional view of Figure 1;

[0009] Figure 3 is a three-dimensional view of the pole element in Figure 1;

[0010] Figure 4 is another perspective view of Figure 3;

[0011] Figure 5 is an exploded view of the pole element, output component, and insulation component.

[0012] The reference numerals in the attached drawings are explained as follows: 1. Pole element; 11. Conductive sheet; 11a. Thick area; 11b. Thin area; 11c. Fuse structure; 12. Pole; 121. Pole body; 122. Riveting flange; 121a. Large diameter section; 121b. Small diameter section; B. First riveting step surface; C. Second riveting step surface; 2. Output component; 3. Housing; A. Through hole; 4. Insulating component; 41. First insulating part; 42. Second insulating part. Detailed Implementation

[0013] This application provides a battery. To enable those skilled in the art to better understand the technical solution of this application, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0014] As shown in Figure 1, the battery includes a housing 3 (only the cover plate of the housing 3 is shown in the figure), a cell (not shown in the figure), a terminal element 1, and an insulating component 4.

[0015] The housing 3 includes a main body and a cover plate. The main body has an opening, and the cover plate covers the opening of the main body, together with the main body to form a receiving cavity.

[0016] As shown in Figure 2, the electrode element 1 is fixed to the housing 3. The electrode element 1 and the housing 3 are insulated from each other by an insulating member 4. The electrode element 1 includes a conductive sheet 11 and N electrodes 12, where N≥2, and in the illustrated embodiment, N=2. The cover plate portion of the housing 3 is provided with through holes A, and each electrode 12 corresponds to one through hole A. At least a portion of the electrode 12 passes through the corresponding through hole A and is fixed to the cover plate portion of the housing 3.

[0017] As shown in Figure 3, all the terminals 12 of the electrode element 1 are integrally formed with the conductive sheet 11. All the terminals 12 of the electrode element 1 have the same polarity and can be either positive or negative terminals. All the terminals 12 of the electrode element 1 are located on the same side of the conductive sheet 11, with one end connected to the conductive sheet 11 and the other end relatively away from the conductive sheet 11. All the terminals 12 of the electrode element 1 are substantially parallel to each other.

[0018] The battery cell is located within the housing cavity of the casing 3. The battery cell includes a cell body and tabs. The cell body includes a positive electrode, a negative electrode, and a separator, with the separator located between the positive and negative electrode. Tabs extend from at least one end of the cell body and are soldered to the conductive sheet 11 of the terminal element 1. The solder joint area between the conductive sheet 11 and the tab (indicated by M in the figure) is S1. The cross-sectional area of ​​a single through-hole A is S2, where 0.04 ≤ (N*S2) / S1 ≤ 1.2. Preferably, S1 is in the range of 50 mm. 2 ≤S1≤300mm 2 The specific value of S1 can be: 50mm 2 60mm 2 70mm 2 80mm 2 90mm 2 100mm 2 120mm 2 140mm 2 160mm 2 180mm 2 200mm 2 220mm 2 240mm 2 260mm 2 280mm 2 300mm 2 Preferably, the range of S2 is 6mm. 2 ≤S2≤15mm 2 The specific value of S2 can be: 6mm 2 7mm 2 8mm 2 9mm 2 10mm 2 11mm 212mm 2 13mm 2 14mm 2 15mm 2 .

[0019] Since the electrode post 12 and the conductive plate 11 are an integral structure, the welding area between the electrode tab and the conductive plate 11 is not affected by the welding area between the electrode post 12 and the conductive plate 11. Under the premise of satisfying overcurrent requirements, the welding area between the electrode tab and the conductive plate 11 can be made large. However, because the electrode post 12 and the conductive plate 11 are an integral structure, the heat transfer efficiency is high. If the welding area between the electrode tab and the conductive plate 11 is too large, the heat generated during welding will be large. If the cross-sectional area of ​​the electrode post 12 is small at this time, the heat cannot be released quickly, which will affect the insulation between the electrode post 12 and the shell 3. The insulation component 4 has an impact, and the size of the cross-sectional area of ​​the pole post 12 is determined by the size of the cross-sectional area S2 of the through hole A on the housing 3 used to pass through the pole post. By limiting the ratio of the total area (N*S2) of the multiple through holes A on the housing 3 used to pass through the pole post 12 to the welding area (S1) of the electrode tab and the conductive sheet 11 to be within the range of 0.04-1.2, when the pole post 12 and the conductive sheet 11 are an integral structure, the welding of the electrode tab and the conductive sheet 11 satisfies the overcurrent requirement, and the welding heat will not cause the insulation component 4 to overheat, melt, or deform and fail.

[0020] Specifically:

[0021] If (N*S2) / S1 is too small, it means that S1 is too large or N*S2 is too small. If S1 is too large, the welding heat generated when welding the conductive sheet 11 and the tab will be excessive. Therefore, a lot of welding heat will be transferred to the insulating component 4, which may cause the insulating component 4 to overheat, melt, or deform and fail. If N*S2 is too small, the cross-sectional area of ​​the part of the pole 12 that passes through the through hole A will be too small. This will result in a slow heat dissipation from the pole 12 to the outside, causing the insulating component 4 to overheat, melt, or deform and fail. 0.4≤(N*S2) / S1 ensures that, given a fixed welding area between the tab and the conductive sheet 11, the product of the number of through holes N and the cross-sectional area S2 of the through holes has a lower limit. Provided that this lower limit is not less than, the pole can quickly dissipate the heat generated when welding the tab and the conductive sheet 11, preventing the insulating component 4 from melting due to the welding heat generated when welding the conductive sheet 11 and the tab.

[0022] If (N*S2) / S1 is too large, it means that S1 is too small or N*S2 is too large. If S1 is too small, the welding area between the battery tab and the conductive sheet is too small, resulting in insufficient current carrying capacity at the connection between the tab and the conductive sheet, and poor reliability and electrical connection stability of the connection between the tab and the conductive sheet 11. If N*S2 is too large, the weight of the terminal 12 is too large, which can easily cause the conductive sheet 11 to be uneven, making it difficult to weld the conductive sheet 11 and the tab. Moreover, when N*S2 is too large, it means that N is too large, or S2 is too large, or both N and S2 are too large. The area of ​​the conductive sheet 11 is fixed. Therefore, when N*S2 is too large, the distance between adjacent terminals 12 is too small, resulting in poor strength of the housing 3 between adjacent terminals 12. This makes it easy for warping to occur near the area where the through hole A is set in the housing 3 when fixing the housing 3 and the terminal element 1, resulting in poor battery assembly quality. (N*S2) / S1≤1.2 ensures that, given a fixed welding area between the tab and the conductive sheet 11, the value of N*S2 has an upper limit, meaning that the value of the quantity N will not be too large or the cross-sectional area S2 of the through hole will not be too large. This ensures that the welding heat between the tab and the conductive sheet 11 can be dissipated quickly, avoiding affecting the insulation performance of the insulating component 4, while also ensuring that the battery has good overcurrent capacity, good electrical connection stability, and good assembly quality.

[0023] In some embodiments, the minimum thickness of the conductive sheet 11 is H, 50 mm. 3 ≤H*S1≤300mm 3 The preferred range of H is: 0.8mm≤H≤2.5mm, and the specific values ​​of H can be: 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm, 2.4mm, 2.5mm.

[0024] By controlling the product of H and S1 within the aforementioned range, the thickness of the conductive sheet 11 can be adjusted according to the welding area between the tab and the conductive sheet 11 during welding. This allows the conductive sheet 11 to also play a role in heat dissipation during welding, preventing most of the heat from being transferred to the post 12 and affecting the insulation effect of the insulating component 4 between the post 12 and the housing 3. Specifically, when the welding area S1 between the conductive sheet 11 and the tab is small, the heat generated during welding is small, and the heat dissipation requirement for the conductive sheet 11 is low. Simultaneously, to improve the stability of the connection between the post 12 and the housing 3 and to ensure the flatness of the conductive sheet 11, the thickness H of the conductive sheet 11 can be increased. Conversely, when the welding area between the tab and the conductive sheet 11 is too large, the heat generated during welding is greater, and the heat dissipation requirement for the conductive sheet 11 is higher. Therefore, the thickness H of the conductive sheet 11 needs to be smaller to improve its heat dissipation efficiency and prevent heat from concentrating on the post 12, thus affecting the lifespan of the insulating component 4. When the product of H and S1 is too small, it means that H is too small, S1 is too small, or both H and S1 are too small. If H is too small, although the heat dissipation capacity of the conductive sheet 11 is improved, the current carrying capacity of the conductive sheet 11 is reduced, and the strength decreases, thus affecting the installation of the terminal and the safety performance of the battery. If S1 is too small, that is, the welding area between the electrode tab and the conductive sheet 11 is too small, the current carrying capacity between the electrode tab and the conductive sheet 11 will decrease, and the welding strength between the electrode tab and the conductive sheet 11 will decrease, making the electrode tab prone to breakage. Cracks; When the product of H and S1 is too large, it means that H is too large, S1 is too large, or both H and S1 are too large. If H is too large, the current carrying capacity of the conductive sheet 11 is improved, but the heat dissipation performance of the conductive sheet 11 is poor, and most of the heat will be transferred to the pole 12, thus affecting the insulation performance of the insulating component 4. If S1 is too large, there will be too much heat when the tab is welded to the conductive sheet 11. The heat dissipation capacity of the conductive sheet 11 is limited, and most of the heat will still be transferred to the pole 12, thus affecting the insulation performance of the insulating component 4.

[0025] In some embodiments, the minimum spacing between the orthographic projections of the different poles 12 of the pole element 1 onto the conductive sheet 11 is 'a', where 20mm ≤ a ≤ 100mm. Specific values ​​for 'a' can be: 20mm, 30mm, 32mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, or 100mm.

[0026] By controlling 'a' within the aforementioned range, the heat from adjacent terminals 12 can be prevented from affecting each other and thus impacting the insulation component 4. Simultaneously, it prevents the terminals 12 from being too close together, which could lead to wrinkling on the surface of the casing 3 or excessive stress concentration causing cracking. If 'a' is too small, heat from different terminals 12 of the terminal element 1 will be transferred to the insulation component 4 on adjacent terminals, causing excessive heat absorption by the insulation component 4 of one terminal 12 during welding, resulting in localized overheating and melting of the insulation component 4. If 'a' is too large, the area of ​​the conductive sheet 11 needs to be larger to accommodate welding with the terminals, thus occupying too much internal space in the casing 3 and resulting in low battery energy density.

[0027] In some embodiments, the electrode post 12 includes an electrode post body 121 and a riveting flange 122. One end of the electrode post body 121 is connected to the conductive sheet 11, and the other end of the electrode post body 121 extends through the through hole A to the outside of the housing 3. The electrode post element 1 and the housing 3 are riveted together by the riveting flange 122. When welding the conductive sheet 11 to the electrode tab, some of the welding heat can be dissipated into the air through the riveting flange 122. The riveting flange 122 can increase the heat dissipation area, thereby playing a heat dissipation role.

[0028] In some embodiments, the cross-sectional area of ​​the riveted flange 122 is S3, where 0.05 ≤ (N*S3) / S1 ≤ 1.28. A preferred range for S3 is 7 mm. 2 ≤S3≤16mm 2 The specific value of S3 can be: 7.0mm 2 7.5mm 2 8.0mm 2 8.6mm 2 9.0mm 2 9.5mm 2 10.0mm 2 10.5mm 2 11.0mm 2 11.5mm 2 12.0mm 2 12.5mm 2 13.0mm 2 13.5mm 2 14.0mm 2 14.5mm 2 15.0mm 2 15.5mm 2 16.0mm 2 .

[0029] By controlling (N*S3) / S1 within the above range, it is possible to ensure that the riveting flange 122 can provide heat dissipation capacity, preventing the heat of the terminal post 12 from melting the insulating part 4 and affecting the insulation performance. At the same time, it is possible to avoid the riveting flange 122 being too large, which would affect the installation of adjacent terminals 12. Furthermore, an excessively large riveting flange 122 has poor flatness, which would affect the welding of the conductive busbar and the terminal post during subsequent battery assembly and easily cause poor soldering. When (N*S3) / S1 is too small, it means that N*S3 is too large or S1 is too small. If N*S3 is too large, it will result in an excessively large area of ​​the riveting flange 122, affecting the installation of adjacent terminals 12. At the same time, the flatness of the riveting flange 122 is poor, which can easily cause poor soldering between the conductive busbar and the terminal during battery assembly. When (N*S3) / S1 is too large, it means that N*S3 is too small or S1 is too large. If N*S3 is too small, the heat of the terminal 12 cannot be dissipated quickly through the riveting flange 122, which will affect the insulation component 4 and reduce the insulation effect of the insulation component 4.

[0030] In some embodiments, the battery includes an output component 2, and the terminal 12 is electrically connected to the output component 2. The output component 2 is used to electrically connect to the battery pack's terminals, so that the terminal 12 is indirectly electrically connected to the battery pack's terminals through the output component 2. Of course, the output component 2 can also be omitted. When the output component 2 is omitted, the terminal 12 is directly electrically connected to the battery pack's terminals.

[0031] In the illustrated embodiment, an output component 2 is provided. The pole body 121 has a large-diameter section 121a and a small-diameter section 121b. One end of the large-diameter section 121a is connected to the conductive sheet 11, and the small-diameter section 121b is connected between the other end of the large-diameter section 121a and the riveting flange 122. The junction of the large-diameter section 121a and the small-diameter section 121b forms a first riveting step surface B, and the junction of the small-diameter section 121b and the riveting flange 122 forms a second riveting step surface C. The output component 2 is at least partially located between the first riveting step surface B and the second riveting step surface C, and is riveted to the pole 12 through the first riveting step surface B and the second riveting step surface C.

[0032] In some embodiments, the minimum distance between the insulating element 4 and the solder mark in the thickness direction of the conductive sheet 11 is b, and the range of b is 5mm≤b≤50mm. The specific value of b can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, or 50mm. By controlling b within the aforementioned range, the solder joints of the insulating component 4 and the tabs and conductive sheet 11 are at a certain distance. Heat loss occurs during the soldering of the tabs and conductive sheet 11. This means that when the minimum spacing between the insulating component 4 and the solder joints of the tabs and conductive sheet 11 is within this range, the range of (N*S2) / S1 can be further narrowed to 0.1≤(N*S2) / S1≤1.2. That is, for the same size S1, when b is within the aforementioned range, with the number of poles 12 remaining unchanged, the through-hole area S2 corresponding to a single pole 12 can be reduced to ensure the fixing strength between the pole and the shell, and the shell will not crack due to stress concentration. When b is too small, the insulating component 4 is too close to the solder joint, and heat is not easily lost. The larger b is, the smaller the adverse effect of welding heat on the insulating component. However, an excessively large b will lead to an excessively long current path, excessive resistance, and insufficient overcurrent capacity. At the same time, an excessively large b will affect the installation space of the battery cells inside the battery and reduce the energy density of the battery.

[0033] In some embodiments, the orthographic projection of the electrode post 12 onto the conductive sheet 11 at least partially overlaps with the solder marks of the conductive sheet 11 and the tab. This design results in a shorter current transmission path and lower resistance, which is beneficial for improving the battery's overcurrent capacity. However, with this overlap, the heat transmission path is shorter, and the welding heat has a greater impact on the insulating component 4. Therefore, the value of (N*S2) / S1 cannot be too small. Consequently, the lower limit of (N*S2) / S1 needs to be increased. That is, given a fixed number of vias N, the via area S2 needs to be increased, or given a fixed via area S2, the number of vias N needs to be increased. For example, the range of (N*S2) / S1 can be further narrowed to 0.15 ≤ (N*S2) / S1 ≤ 1.2.

[0034] In some embodiments, the orthographic projection of the electrode post 12 on the conductive sheet 11 does not overlap with the solder marks of the conductive sheet 11 and the tab. For example, in Figure 3, the solder marks of the conductive sheet 11 and the tab are located between the orthographic projections of the two electrode posts 12 on the conductive sheet 11. With this design, the welding heat from the tab and the conductive sheet 11 is transferred to the insulating component 4 through the electrode post 12 via a longer path, thus reducing the adverse effects of welding heat on the insulating component 4. In the case of non-overlap, the impact of welding heat on the insulating component 4 is smaller. Therefore, the value of (N*S2) / S1 can be smaller, and thus the upper limit of (N*S2) / S1 can be smaller. That is, for a given welding area S1 between the tab and the conductive sheet 11, the value of N*S2 can be smaller, meaning the value of the number N can be smaller, or the value of the cross-sectional area S2 of a single electrode post 12 relative to the through hole in the housing can be smaller. For example, the range of (N*S2) / S1 can be further narrowed to 0.04 ≤ (N*S2) / S1 ≤ 1.0.

[0035] In some embodiments, the housing 3 is generally rectangular, with the long side of the rectangle pointing in the direction of the battery's length and the short side pointing in the direction of the battery's width. All the terminals 12 of the terminal element 1 are arranged sequentially in the width direction of the battery. In this way, the terminal element 1 occupies a relatively small length in the length direction of the battery, allowing the cell body to be set larger in the length direction of the battery, which is more conducive to improving the battery's energy density.

[0036] In some embodiments, the conductive sheet 11 has a corresponding fusible structure 11c near at least one terminal 12. Specifically, a fusible structure 11c can be provided near each terminal 12, or it can be provided near one or more of the terminal 12. When the orthogonal projection of different terminals 12 of the terminal element 1 onto the conductive sheet 11 is different from the distance between the conductive sheet 11 and the solder joint of the electrode tab, a fusible structure 11c is provided at least near the terminal 12 closest to the solder joint, because the welding heat is most concentrated near the terminal 12 closest to the solder joint, and overcurrent is most likely to occur. Once an overcurrent occurs, the conductive sheet 11 breaks at the fusible structure 11c, preventing the overcurrent from spreading to the battery cell, thereby reducing the risk of battery thermal runaway.

[0037] In the illustrated embodiment, the fusion structure 11c is a through hole, extending from the side of the conductive sheet 11 where the electrode post 12 is located to the side of the conductive sheet 11 where it is connected to the electrode tab. In other embodiments, the fusion structure 11c can also be a thinning region, the thickness of which is less than the thickness of other areas of the conductive sheet 11. Specifically, the thinning region can be formed by stamping, scoring, or cutting.

[0038] In the illustrated embodiment, as shown in Figure 5, the conductive sheet 11 has a thick region 11a and a thin region 11b. The orthogonal projection of all the terminals 12 of the terminal element 1 onto the conductive sheet 11 falls within the thick region 11a, which makes the connection between the terminal 12 and the conductive sheet 11 stronger. The fusible link 11c is located in the thin region 11b, so that when the battery experiences overcurrent, the fusing is faster, which is more conducive to reducing the risk of thermal runaway of the battery.

[0039] In the illustrated embodiment, the insulating member 4 includes a first insulating portion 41 and a second insulating portion 42, which are independent of each other. In other embodiments, the first insulating portion 41 and the second insulating portion 42 may also be integrated together. The number of first insulating portions 41 is consistent with the number of poles 12 of the pole element 1. The first insulating portion 41 has a sleeve portion and an annular protrusion located on the outer periphery of the sleeve portion. The sleeve portion of each first insulating portion 41 is respectively fitted over a pole 12 and located in a through hole A of the housing 3. The annular protrusion of each first insulating member 4 is located between the conductive sheet 11 and the inner side of the housing 3, so that the pole element 1 and the housing 3 are insulated from each other. The second insulating portion 42 is at least partially located between the output member 2 and the outer side of the housing 3, so that the output member 2 and the housing 3 are insulated from each other.

[0040] The above examples illustrate the principles and implementation methods of this application. The descriptions of the embodiments are merely for the purpose of helping to understand the methods and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A battery, characterized in that, The device includes a housing (3), a terminal element (1), an insulating component (4), and a battery cell located inside the housing (3). The terminal element (1) is fixed to the housing (3), and the terminal element (1) and the housing (3) are insulated from each other by the insulating component (4). The terminal element (1) includes a conductive sheet (11) and N terminals (12) located on the same side of the conductive sheet (11), where N ≥ 2. The N terminals (12) have the same polarity and are integral with the conductive sheet (11). The battery cell includes a tab, and the conductive sheet (11) is welded to the tab with a solder area of ​​S1. The housing (3) is provided with a through hole (A), and each terminal (12) corresponds to one through hole (A). The terminal (12) passes through at least part of the corresponding through hole (A). The cross-sectional area of ​​the through hole (A) is S2, and 0.04 ≤ (N*S2) / S1 ≤ 1.

2.

2. The battery according to claim 1, characterized in that, 50mm 2 ≤S1≤300mm 2 ,6mm 2 ≤S2≤15mm 2 。 3. The battery according to any one of claims 1-2, characterized in that, The minimum thickness of the conductive sheet (11) is H, 50 mm. 3 ≤H*S1≤300mm 3 , 0.8mm≤H≤2.5mm.

4. The battery according to any one of claims 1-3, characterized in that, The minimum spacing a of the different poles (12) of the pole element (1) on the orthographic projection of the pole on the conductive sheet (11) is 20mm≤a≤100mm.

5. The battery according to any one of claims 1-4, characterized in that, The pole (12) includes a pole body (121) and a riveting flange (122). One end of the pole body (121) is connected to the conductive sheet (11), and the other end of the pole body (121) extends through the through hole (A) to the outside of the housing (3). The riveting flange (122) is disposed at the end of the pole body (121) located outside the housing (3). The pole element (1) is riveted to the housing (3) through the riveting flange (122).

6. The battery according to claim 5, characterized in that, The cross-sectional area of ​​the riveted flange (122) is S3, and 0.05≤(N*S3) / S1≤1.

28.

7. The battery according to any one of claims 1-6, characterized in that, In the thickness direction of the conductive sheet (11), the minimum distance between the insulating element (4) and the solder mark is b, 5mm≤b≤50mm, 0.1≤(N*S2) / S1≤1.

2.

8. The battery according to any one of claims 1-7, characterized in that, The orthographic projection of the pole post (12) on the conductive sheet (11) does not overlap with the solder mark, and 0.04≤(N*S2) / S1≤1.

0.

9. The battery according to any one of claims 1-7, characterized in that, The orthographic projection of the pole post (12) on the conductive sheet (11) at least partially overlaps with the solder mark, and 0.15≤(N*S2) / S1≤1.

2.

10. The battery according to any one of claims 1-9, characterized in that, The conductive sheet (11) is provided with a fusible structure (11c).

11. The battery according to claim 10, characterized in that, The conductive sheet (11) has a thick region (11a) and a thin region (11b). The orthographic projection of all the poles (12) of the pole element (1) on the conductive sheet (11) falls within the thick region (11a), and the fusible structure (11c) is located in the thin region (11b).

12. The battery according to claims 1-11, characterized in that, The battery includes an output component (2), and the terminal (12) is electrically connected to the output component (2). The output component (2) is used to electrically connect to the battery pack's terminals, so that the terminal (12) is indirectly electrically connected to the battery pack's terminals through the output component (2).

13. The battery according to claim 12, characterized in that, The pole body (121) has a large diameter section (121a) and a small diameter section (121b). One end of the large diameter section (121a) is connected to the conductive sheet (11), and the small diameter section (121b) is connected between the other end of the large diameter section (121a) and the riveting flange (122). The junction of the large diameter section (121a) and the small diameter section (121b) forms a first riveting step surface (B), and the junction of the small diameter section (121b) and the riveting flange (122) forms a second riveting step surface (C). The output component (2) is at least partially located between the first riveting step surface (B) and the second riveting step surface (C), and is riveted to the pole (12) through the first riveting step surface (B) and the second riveting step surface (C).

14. The battery according to claim 12, characterized in that, The insulating element (4) includes a first insulating part (41) and a second insulating part (42). The number of the first insulating parts (41) is the same as the number of poles (12) of the pole element (1). The first insulating part (41) has a sleeve and an annular protrusion located on the outer periphery of the sleeve. The sleeve of each first insulating part (41) is respectively fitted outside a pole (12) and located in a through hole (A) of the housing (3). The annular protrusion of each first insulating element (4) is located between the conductive sheet (11) and the inner side of the housing (3), so that the pole element (1) and the housing (3) are mutually insulated. The second insulating part (42) is at least partially located between the output element (2) and the outer side of the housing (3), so that the output element (2) and the housing (3) are mutually insulated.

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