Battery

Abstract

The utility model relates to the technical field of batteries, and provides a battery, which comprises a square shell structure, the shell structure comprises steel, and the heat conductivity coefficient m of the shell structure is 10w / (m.k)-90w / (m.k); the battery cell is arranged in the shell structure, the battery cell comprises a battery cell main body and a tab part, and the tab part extends out of the battery cell main body; wherein the battery cell main body comprises pole pieces and diaphragms, the diaphragms coat the outer sides of the pole pieces to form the outer surface of the battery cell main body, the number of layers of the diaphragms coating the outer sides of the pole pieces in the thickness direction of the battery cell main body is n, and m / n is greater than or equal to 1w / (m.k) and less than or equal to 90w / (m.k), so that reliable heat dissipation of the battery cell can be ensured; and the diaphragm can be ensured to form insulation protection between the battery cell and the shell structure, so that the safe use performance of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery. Background Art

[0002] In the related art, a battery may include a shell structure and a battery cell. The battery cell is disposed in the shell structure. During normal use, the battery will generate a large amount of heat, and the heat inside the battery cell needs to be quickly dissipated through the shell structure. If the heat is not dissipated in time, it may cause battery safety problems. Utility Model Content

[0003] The utility model provides a battery to improve the use performance of the battery.

[0004] The utility model provides a battery, comprising:

[0005] The shell structure is square, the shell structure includes steel, and the thermal conductivity m of the shell structure is 10w / (m·k)-90w / (m·k);

[0006] The battery cell is arranged in the shell structure, and the battery cell comprises a battery cell body and a pole ear portion, and the pole ear portion extends out from the battery cell body;

[0007] Among them, the battery cell body includes a pole piece and a diaphragm, and the diaphragm is coated on the outside of the pole piece to form the outer surface of the battery cell body. Along the thickness direction of the battery cell body, the number of layers of the diaphragm coated on the outside of the pole piece is n, 1w / (m·k)≤m / n≤90w / (m·k).

[0008] A battery of one embodiment of the utility model comprises a shell structure and a battery cell, wherein the battery cell is arranged in the shell structure, the battery cell comprises a battery cell body and a pole ear portion, the pole ear portion extends from the battery cell body, the battery cell body comprises a pole piece and a diaphragm, the diaphragm is coated on the outer side of the pole piece, the shell structure comprises steel, the thermal conductivity coefficient m of the shell structure is 10w / (m·k)-90w / (m·k), along the thickness direction of the battery cell body, the number of layers of the diaphragm coated on the outer side of the pole piece is n, 1w / (m·k)≤m / n≤90w / (m·k), which can not only ensure reliable heat dissipation of the battery cell, but also ensure that the diaphragm can form insulation protection between the battery cell and the shell structure, thereby improving the safe use performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0010] Figure 1 is a schematic structural diagram of a battery according to an exemplary embodiment;

[0011] Figure 2 is a schematic diagram of an exploded structure of a battery according to an exemplary embodiment;

[0012] Figure 3 is a schematic structural diagram of a battery cell according to an exemplary embodiment;

[0013] Figure 4 is a schematic structural diagram of a battery cell according to another exemplary embodiment;

[0014] Figure 5 is a schematic diagram of a partial structure of a battery cell according to an exemplary embodiment.

[0015] The following are the descriptions of the reference numerals:

[0016] 10. Shell structure; 11. Cover plate; 12. Shell member; 121. Open end; 13. First largest surface; 20. Battery cell; 21. Battery cell body; 211. Diaphragm; 212. First pole piece; 213. Second pole piece; 22. Pole ear; 23. Second largest surface; 30. Electrode terminal structure. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0018] In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0019] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0020] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0021] An embodiment of the present invention provides a battery. Figures 1 to 5 The battery comprises: a shell structure 10, which is square and comprises steel, and a thermal conductivity coefficient m of the shell structure 10 is 10w / (m·k)-90w / (m·k); a battery cell 20, which is arranged in the shell structure 10, and the battery cell 20 comprises a battery cell body 21 and a pole ear portion 22, and the pole ear portion 22 extends from the battery cell body 21; wherein the battery cell body 21 comprises a pole piece and a diaphragm 211, and the diaphragm 211 is coated on the outer side of the pole piece to form the outer surface of the battery cell body 21, and along the thickness direction of the battery cell body 21, the number of layers of the diaphragm 211 coated on the outer side of the pole piece is n, and 1w / (m·k)≤m / n≤90w / (m·k).

[0022] A battery according to an embodiment of the utility model comprises a shell structure 10 and a battery cell 20. The battery cell 20 is arranged in the shell structure 10. The battery cell 20 comprises a battery cell body 21 and a pole ear portion 22. The pole ear portion 22 extends from the battery cell body 21. The battery cell body 21 comprises a pole piece and a diaphragm 211. The diaphragm 211 is coated on the outer side of the pole piece. The shell structure 10 comprises steel. The thermal conductivity m of the shell structure 10 is 10w / (m·k)-90w / (m·k). Along the thickness direction of the battery cell body 21, the number of layers of the diaphragm 211 coated on the outer side of the pole piece is n, 1w / (m·k)≤m / n≤90w / (m·k). This can not only ensure reliable heat dissipation of the battery cell 20, but also ensure that the diaphragm 211 can form insulation protection between the battery cell 20 and the shell structure 10, thereby improving the safe use performance of the battery.

[0023] It should be noted that the shell structure 10 includes steel. The shell structure 10 may include pure steel, carbon steel, nickel-plated steel, etc. The steel may include martensitic steel, austenitic steel, etc., which is not limited here.

[0024] The outer shell structure 10 is square, that is, the shape of the outer shell structure 10 is basically a rectangular parallelepiped or a cube. The battery is a square battery, that is, the battery is a quadrangular prism battery. The quadrangular prism battery mainly refers to a prism shape, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corners between the sides are not necessarily right angles, and can be arc transitions.

[0025] Combination Figure 2 As shown, the battery cell 20 is arranged in the shell structure 10, and the battery cell 20 includes a battery cell body 21 and a pole ear portion 22, and the pole ear portion 22 extends from the battery cell body 21. There may be two pole ear portions 22, and the two pole ear portions 22 may be a positive pole ear and a negative pole ear, respectively. The positive pole ear and the negative pole ear may extend from the same end of the battery cell body 21, or the positive pole ear and the negative pole ear may extend from opposite ends of the battery cell body 21. An electrode terminal structure 30 may be arranged on the shell structure 10, and there may be two electrode terminal structures 30, and the two electrode terminal structures 30 may be a positive electrode terminal structure and a negative electrode terminal structure, respectively. The positive electrode terminal structure and the negative electrode terminal structure may be electrically connected to the positive pole ear and the negative pole ear, respectively.

[0026] The battery cell body 21 includes a pole piece and a diaphragm 211 . The diaphragm 211 is coated on the outer side of the pole piece to form the outer surface of the battery cell body 21 , so that the diaphragm 211 can form insulation protection for the battery cell body 21 .

[0027] The thermal conductivity m of the shell structure 10 is 10w / (m·k)-90w / (m·k), and the number of layers of the diaphragm 211 covering the outer side of the pole piece along the thickness direction of the battery core body 21 is n. Figure 4 As shown, the electrode piece may include a first electrode piece 212 and a second electrode piece 213, and the diaphragm 211 is located between the first electrode piece 212 and the second electrode piece 213. Figure 5 As shown, the extended portion of the diaphragm 211 forms external protection for the pole piece, and the number of layers of the diaphragm 211 coated on the outside of the pole piece is n, which can be considered as the number of layers of the diaphragm 211 located outside the outermost first pole piece 212 is n, or the number of layers of the diaphragm 211 coated on the outside of the pole piece is n, which can be considered as the number of layers of the diaphragm 211 located outside the outermost second pole piece 213 is n.

[0028] The thermal conductivity m of the shell structure 10 is relatively low, so the number of layers n of the diaphragm 211 is prevented from being too large and affecting the heat dissipation of the battery cell 20, that is, the rapid heat transfer between the pole piece and the diaphragm 211 can be achieved by reducing the diaphragm 211 on the outer layer of the battery cell 20. However, if the ratio of the thermal conductivity m of the shell structure 10 to the number of layers n of the diaphragm 211 coated on the outer side of the pole piece is too large, there may be a risk of insulation failure between the battery cell 20 and the shell structure 10.

[0029] The thermal conductivity m of the shell structure 10 can be 10w / (m·k), 15w / (m·k), 20w / (m·k), 25w / (m·k), 30w / (m·k), 35w / (m·k), 40w / (m·k), 45w / (m·k), 50w / (m·k), 55w / (m·k), 60w / (m·k), 65w / (m·k), 70w / (m·k), 75w / (m·k), 80w / (m·k), 85w / (m·k) or 90w / (m·k), etc.

[0030] The ratio of the thermal conductivity m of the shell structure 10 to the number of layers n of the diaphragm 211 coated on the outside of the pole piece can be 1w / (m·k), 1.5w / (m·k), 2w / (m·k), 2.5w / (m·k), 3w / (m·k), 3.5w / (m·k), 4w / (m·k), 4.5w / (m·k), 5w / (m·k), 5.5w / (m·k), 6w / (m·k), 6.5w / (m·k), 7w / (m·k), 7.5w / (m·k), 8w / (m·k), 8.5w / (m·k). / (m·k)、9w / (m·k)、10w / (m·k)、15w / (m·k)、20w / (m·k)、25w / (m·k)、30w / (m·k)、35w / (m·k)、40w / (m·k)、45w / (m·k ), 50w / (m·k), 55w / (m·k), 60w / (m·k), 65w / (m·k), 70w / (m·k), 75w / (m·k), 80w / (m·k), 85w / (m·k) or 90w / (m·k), etc.

[0031] In one embodiment, the outer shell structure 10 is a steel shell, which can not only ensure the overall structural strength of the outer shell structure 10 but also reduce the corrosion risk of the outer shell structure 10, thereby improving the safety performance of the battery.

[0032] In one embodiment, the thickness of the single-layer diaphragm 211 is 7μm-18μm, which can not only ensure the insulation distance between the outer shell structure 10 and the battery cell 20, and the insulation distance between the first pole piece 212 and the second pole piece 213, but also avoid the single-layer diaphragm 211 being too thick, resulting in a slower thermal conductivity rate of the battery cell 20 and affecting the battery charge and discharge rate.

[0033] The thickness of the single-layer membrane 211 may be 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm or 18 μm, etc.

[0034] In one embodiment, the porosity of the diaphragm 211 is 30%-65%, 1w / (m·k)≤m / n≤85w / (m·k), which can not only increase the gas diffusion distance, but also prevent metal chips from piercing the diaphragm 211 and causing a short circuit between the first pole piece 212 and the second pole piece 213.

[0035] The porosity of the diaphragm 211 is 30%-65%, that is, by increasing the porosity of the diaphragm 211, the thermal conductivity m of the shell structure 10 can be appropriately reduced, and the number of layers of the diaphragm 211 can be ensured to be reasonable, thereby ensuring the insulation performance.

[0036] The porosity of the membrane 211 may be 30%, 32%, 35%, 36%, 38%, 40%, 42%, 45%, 46%, 48%, 50%, 52%, 55%, 56%, 58%, 60%, 62% or 65%, etc.

[0037] In one embodiment, the number of layers of the diaphragm 211 coated on the outside of the pole piece is n, 1≤n≤10, which can not only effectively control the insulation performance between the outer shell structure 10 and the battery cell 20, but also avoid too many layers n of the diaphragm 211 coated on the outside of the pole piece, which affects the heat dissipation capacity and energy density of the battery.

[0038] The number n of layers of the diaphragm 211 coated on the outside of the pole piece may be 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.

[0039] In one embodiment, Figure 1 and Figure 2 As shown, the shell structure 10 includes a cover plate 11 and a shell member 12, the shell member 12 is formed with an open end 121, and the cover plate 11 and the shell member 12 are connected to close the open end 121; wherein, the pole ear portion 22 extends from one end of the battery cell body 21 toward the cover plate 11, and the ratio of the area enclosed by the circumferential outer edge of the one end of the battery cell body 21 toward the cover plate 11 to the area of ​​the open end 121 is ≥92%, so that the internal space of the shell structure 10 can be fully utilized, the distance between the battery cell 20 and the shell structure 10 can be shortened, and the overall heat dissipation efficiency can be improved, thereby improving the safe use performance of the battery.

[0040] The ratio of the area enclosed by the circumferential outer edge of one end of the battery cell body 21 facing the cover plate 11 to the area of ​​the opening end 121 is 92%, 92.5%, 93%, 93.5%, 94%, 94.5%, 95%, 95.5% or 96%, etc.

[0041] In one embodiment, in combination Figure 2 As shown, the first largest surface 13 of the shell structure 10 is arranged opposite to the second largest surface 23 of the battery cell body 21, and the ratio of the area of ​​the second largest surface 23 of the battery cell body 21 to the area of ​​the first largest surface 13 of the shell structure 10 is 85%-99.98%, which can not only ensure the internal space utilization rate of the shell structure 10, thereby improving the energy density of the battery, but also effectively control the heat dissipation capacity of the battery cell 20, thereby improving the safe use performance of the battery.

[0042] The second largest surface 23 of the battery cell body 21 is the surface with the largest area of ​​the battery cell body 21, and the first largest surface 13 of the shell structure 10 is the surface with the largest area of ​​the shell structure 10. The battery cell body 21 may have two opposite second largest surfaces 23, and correspondingly, the shell structure 10 may have two opposite first largest surfaces 13.

[0043] The ratio of the second largest surface 23 of the battery cell body 21 to the first largest surface 13 of the shell structure 10 can be 85%, 86%, 88%, 90%, 91%, 92%, 95%, 96%, 97%, 98%, 99% or 99.98%, etc.

[0044] In one embodiment, the length of the outer shell structure 10 is ≥150 mm, so as to ensure the capacity of the battery and facilitate the subsequent grouping of batteries.

[0045] In one embodiment, the length of the outer shell structure 10 is ≤ 650 mm, which not only facilitates the molding of the battery and improves the manufacturing efficiency of the battery, but also ensures the overall strength of the battery, thereby improving the safe use performance of the battery.

[0046] It should be noted that the length of the housing structure 10 can be 150mm, 155mm, 160mm, 165mm, 170mm, 175mm, 180mm, 185mm, 190mm, 195mm, 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, 300mm, 310mm, 320mm, 330mm, 340mm, 350mm, 360mm m, 370mm, 380mm, 390mm, 400mm, 410mm, 420mm, 430mm, 440mm, 450mm, 460mm, 470mm, 480mm, 490mm, 500mm, 510mm, 520mm, 530mm, 540mm, 550mm, 560mm, 570mm, 580mm, 590mm, 600mm, 610mm, 620mm, 630mm, 640mm or 650mm, etc.

[0047] In one embodiment, the ratio of the thermal conductivity m of the outer shell structure 10 to the wall thickness of the outer shell structure 10 is 25w / mm·(m·k)-1500w / mm·(m·k), which can not only ensure the rapid heat conduction of the battery, but also improve the internal space utilization of the battery.

[0048] The unit of the thermal conductivity m of the shell structure 10 is w / (m·k), the unit of the wall thickness of the shell structure 10 is mm, and the ratio of the thermal conductivity m of the shell structure 10 to the wall thickness of the shell structure 10 can be 25w / mm·(m·k), 30w / mm·(m·k), 40w / mm·(m·k), 300w / mm·(m·k), 400w / mm·(m·k), 500w / mm·(m·k), 600w / mm·(m·k), 700w / mm·(m·k), 800w / mm·(m·k), 900w / mm·(m· k), 1000w / mm·(m·k), 1100w / mm·(m·k), 1200w / mm·(m·k), 1300w / mm·(m·k), 1400w / mm·(m·k) or 1500w / mm·(m·k), etc.

[0049] In one embodiment, a nickel layer is provided on the inner surface of the shell structure 10 facing the battery cell 20, and / or on the outer surface of the shell structure 10 facing away from the battery cell 20, and the thickness of the nickel layer is 5μm-200μm, m / n≥9w / (m·k), thereby ensuring that the overall thermal conductivity of the battery is improved rapidly while avoiding the weak strength of the shell structure 10, thereby reducing the risk of the shell structure 10 breaking after the battery cell 20 expands, and avoiding the insulation capacity affected by too few layers of the diaphragm 211.

[0050] The inner surface of the shell structure 10 facing the battery cell 20 can be provided with a nickel layer, or the outer surface of the shell structure 10 facing away from the battery cell 20 can be provided with a nickel layer, or both the inner surface of the shell structure 10 facing the battery cell 20 and the outer surface of the shell structure 10 facing away from the battery cell 20 can be provided with a nickel layer.

[0051] The thickness of the nickel layer can be 5μm, 8μm, 10μm, 20μm, 30μm, 40μm, 50μm, 60μm, 70μm, 80μm, 90μm, 100μm, 110μm, 120μm, 130μm, 140μm, 150μm, 160μm, 170μm, 180μm, 190μm or 200μm, etc.

[0052] It should be noted that the battery includes a cell and an electrolyte, which is the smallest unit capable of performing electrochemical reactions such as charge / discharge. A cell refers to a unit formed by winding or laminating a stacked portion, the stacked portion including a first pole sheet, a separator, and a second pole sheet. When the first pole sheet is a positive pole sheet, the second pole sheet is a negative pole sheet. The polarities of the first pole sheet and the second pole sheet can be interchanged. The first pole sheet and the second pole sheet are coated with an active material.

[0053] The battery can be a laminated battery, which is not only convenient to group, but also can be processed to obtain a longer battery. Specifically, the battery cell is a laminated battery cell, which has a first pole piece stacked on top of each other, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet arranged between the first pole piece and the second pole piece, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery cell. The diaphragm sheet can be a diaphragm.

[0054] Alternatively, the battery may be a wound battery, that is, a first pole piece, a second pole piece having electrical properties opposite to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery cell. The diaphragm sheet may be a diaphragm.

[0055] An embodiment of the utility model further provides a battery pack, which includes batteries.

[0056] A battery pack according to an embodiment of the utility model comprises a battery including a shell structure 10 and a battery cell 20, wherein the battery cell 20 is arranged in the shell structure 10, the battery cell 20 comprises a battery cell body 21 and a pole ear portion 22, the pole ear portion 22 extends from the battery cell body 21, the battery cell body 21 comprises a pole piece and a diaphragm 211, the diaphragm 211 is coated on the outer side of the pole piece, the shell structure 10 comprises steel, the thermal conductivity m of the shell structure 10 is 10w / (m·k)-90w / (m·k), and along the thickness direction of the battery cell body 21, the number of layers of the diaphragm 211 coated on the outer side of the pole piece is n, 1w / (m·k)≤m / n≤90w / (m·k), which can not only ensure reliable heat dissipation of the battery cell 20, but also ensure that the diaphragm 211 can form insulation protection between the battery cell 20 and the shell structure 10, thereby improving the safe use performance of the battery pack.

[0057] In one embodiment, the battery pack is a battery module or a battery pack.

[0058] The battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate, and the end plate and the side plate are used to fix the plurality of batteries.

[0059] It should be noted that multiple batteries can be arranged in a battery box after forming a battery module, and multiple batteries can be fixed by end plates and side plates. Multiple batteries can be directly arranged in the battery box, that is, there is no need to group multiple batteries, in which case the end plates and side plates can be removed.

[0060] Those skilled in the art will readily come up with other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. The present disclosure is intended to cover any variation, use or adaptation of the present utility model, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and example embodiments are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0061] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from its scope. The scope of protection of the present disclosure is limited only by the appended claims.

Claims

1. A battery, characterized in that: include: An outer shell structure (10), the outer shell structure (10) is square-shaped, the outer shell structure (10) comprises steel, and the thermal conductivity coefficient m of the outer shell structure (10) is 10w / (m·k)-90w / (m·k); A battery cell (20), the battery cell (20) being arranged in the housing structure (10), the battery cell (20) comprising a battery cell body (21) and a pole ear portion (22), the pole ear portion (22) extending out from the battery cell body (21); The battery cell body (21) comprises a pole piece and a diaphragm (211), wherein the diaphragm (211) is coated on the outer side of the pole piece to form the outer surface of the battery cell body (21), and along the thickness direction of the battery cell body (21), the number of layers of the diaphragm (211) coated on the outer side of the pole piece is n, and 1w / (m·k)≤m / n≤90w / (m·k).

2. The battery according to claim 1, characterized in that The thickness of a single layer of the separator (211) is 7 μm-18 μm.

3. The battery according to claim 1, characterized in that The porosity of the diaphragm (211) is 30%-65%, and 1w / (m·k)≤m / n≤85w / (m·k).

4. The battery according to claim 1, characterized in that 1≤n≤10。 5. The battery according to any one of claims 1 to 4, characterized in that The housing structure (10) comprises a cover plate (11) and a shell member (12), the shell member (12) is formed with an open end (121), and the cover plate (11) and the shell member (12) are connected to close the open end (121); The pole ear portion (22) extends from one end of the battery cell body (21) toward the cover plate (11), and the ratio of the area enclosed by the circumferential outer edge of the end of the battery cell body (21) toward the cover plate (11) to the area of ​​the opening end (121) is ≥92%.

6. The battery according to any one of claims 1 to 4, characterized in that The first largest surface (13) of the shell structure (10) is arranged opposite to the second largest surface (23) of the battery cell body (21), and the ratio of the area of ​​the second largest surface (23) of the battery cell body (21) to the area of ​​the first largest surface (13) of the shell structure (10) is 85%-99.98%.

7. The battery according to any one of claims 1 to 4, characterized in that The length of the outer shell structure (10) is ≥150 mm.

8. The battery according to claim 7, characterized in that The length of the outer shell structure (10) is ≤650 mm.

9. The battery according to any one of claims 1 to 4, characterized in that The ratio of the thermal conductivity coefficient m of the outer shell structure (10) to the wall thickness of the outer shell structure (10) is 25w / mm·(m·k)-1500w / mm·(m·k).

10. The battery according to any one of claims 1 to 4, characterized in that A nickel layer is provided on the inner surface of the shell structure (10) facing the battery core (20) and / or on the outer surface of the shell structure (10) facing away from the battery core (20), wherein the thickness of the nickel layer is 5 μm-200 μm, and m / n≥9w / (m·k).

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