CN219371158U - Battery and battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery and a battery pack. The battery includes: the length of the battery shell is L, and L is more than or equal to 300mm and less than or equal to 800mm; the battery cell is arranged in the battery shell, the battery cell is a winding type battery cell, the plane where the winding opening end is positioned and the surface where the length direction of the battery shell is positioned are opposite, a first electrode lug part and a second electrode lug part with opposite polarities are led out from the same end of the battery cell, and the first electrode lug part and the second electrode lug part which are arranged at intervals are led out along the same winding opening end; the first pole is arranged on the surface of the battery shell, which is parallel to the height direction of the battery shell; the first pole is connected with the first pole lug part through the first switching part; the distance between one winding opening end with the first pole lug part and the second pole lug part led out and the inner surface of the battery shell opposite to the winding opening end is a, the distance between the other winding opening end and the inner surface of the battery shell opposite to the winding opening end is b, and a/b is more than or equal to 10 and less than or equal to 100.

Description

Battery and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery and a battery pack.

Background

In the related art, for a battery with a larger length, the electrolyte solution has a poor infiltration effect, so that the electrode plate cannot be infiltrated effectively, and the battery performance is poor. In addition, the conventional battery with a large length can deform after being subjected to vibration impact, and the deformed battery can influence the battery core to damage the battery.

Disclosure of Invention

The utility model provides a battery and a battery pack, which are used for improving the service performance of the battery.

According to a first aspect of the present utility model, there is provided a battery comprising:

the battery shell is provided with a length direction and a height direction, and the length of the battery shell is L, wherein L is more than or equal to 300mm and less than or equal to 800mm;

the battery cell is arranged in the battery shell, the battery cell is a winding type battery cell, winding open ends are formed at two opposite ends of the battery cell, a plane where the winding open ends are located is opposite to the surface where the length direction of the battery shell is located, a first electrode lug and a second electrode lug which are opposite in polarity are led out from the same end of the battery cell, and the first electrode lug and the second electrode lug which are arranged at intervals are led out along the same winding open end;

the first pole is arranged on the surface of the battery shell, which is parallel to the height direction of the battery shell;

the first pole is connected with the first pole lug part through the first switching part;

the distance between one winding opening end of the first pole lug part and the second pole lug part and the inner surface of the battery shell opposite to the winding opening end is a, and the distance between the other winding opening end and the inner surface of the battery shell opposite to the winding opening end is b, and a/b is more than or equal to 10 and less than or equal to 100.

The battery comprises a battery shell and a battery core, wherein the battery core is arranged in the battery shell, the battery shell is provided with a length direction and a height direction, the length of the battery shell is L, the length of the battery shell is more than or equal to 300mm and less than or equal to 800mm, namely, the battery is a battery with larger length and height, and the battery core is a winding type battery core, and the plane of a winding opening end of the battery core is opposite to the surface of the battery shell in the length direction, so that the winding opening end of the winding type battery core is opposite to the surface of the battery in the length direction, the infiltration rate of electrolyte is obviously increased, the overall energy density of the battery can be ensured, the production efficiency is obviously improved, and the electronic transmission path is shortened, thereby improving the service performance of the battery.

In addition, the battery of the embodiment further comprises a first pole lug part, a second pole lug part, a first pole column and a first switching part, wherein the first pole lug part and the second pole lug part are led out from the same end of the battery core, the first pole lug part and the second pole lug part which are arranged at intervals are led out along the same winding opening end, the first pole column is arranged on the surface of the battery shell, which is parallel to the height direction of the battery shell, and the first pole column is connected with the first pole lug part through the first switching part; the distance between one winding opening end of the first pole lug part and the second pole lug part and the inner surface of the battery shell opposite to the winding opening end is a, the distance between the other winding opening end and the inner surface of the battery shell opposite to the winding opening end is b, a/b is more than or equal to 10 and less than or equal to 100, and the space between one end of the battery cell, from which the first pole lug part and the second pole lug part are led out, and the battery shell is larger than the space between the other end of the battery cell and the battery shell. Therefore, redundant electrolyte can be stored in the space between one end of the battery cell, which leads out the first electrode lug part and the second electrode lug part, and the battery shell, and if the electrolyte needs to be infiltrated on one side of the electrode plate, which is close to the first electrode lug part and the second electrode lug part, the electrolyte stored in the space can quickly reach the position of the electrode plate to be infiltrated, so that the infiltration efficiency and the infiltration effect of the electrolyte can be improved.

Meanwhile, the battery is large in length, vibration impact can be received in the daily use process, and the battery shell after the vibration impact can deform. The side of the battery case adjacent to the first and second tab portions is not normally fixed with glue, resulting in a large deformation of the side case. When a/b is less than or equal to 10 and less than or equal to 100, the space between one end of the battery cell, which is led out of the first pole lug part and the second pole lug part, and the battery shell can be enlarged, when the shell on one side of the battery shell, which is close to the first pole lug part and the second pole lug part, is greatly deformed, the larger space can give a larger buffer area to the deformed shell, so that the damage probability of the battery caused by extrusion of the deformed shell can be reduced, and the damage probability of the battery is effectively reduced.

In addition, after the first pole is arranged on one surface of the battery shell, which is perpendicular to the length direction of the battery shell, the first pole can be prevented from occupying the space of the battery in the height direction, so that the space utilization rate of the battery in the height direction is improved, and the energy density of the battery is improved.

According to a second aspect of the present utility model, there is provided a battery pack including the above-described battery.

The battery pack comprises a battery, wherein the battery comprises a battery shell and a battery core, the battery core is arranged in the battery shell, the battery shell is provided with a length direction and a height direction, the length of the battery shell is L, the length of the battery shell is 300mm or less and is 800mm or less, namely the battery is a battery with a relatively large length, the battery core is a winding type battery core, and the plane of a winding opening end of the battery core is opposite to the surface of the battery shell in the length direction, so that the winding opening end of the winding type battery core is opposite to the surface of the battery in the length direction, the infiltration rate of electrolyte is obviously increased, the overall energy density of the battery can be ensured, the production efficiency is obviously improved, and the electronic transmission path is shortened, thereby improving the service performance of the battery.

In addition, the battery of the embodiment further comprises a first pole lug part, a second pole lug part, a first pole column and a first switching part, wherein the first pole lug part and the second pole lug part are led out from the same end of the battery core, the first pole lug part and the second pole lug part which are arranged at intervals are led out along the same winding opening end, the first pole column is arranged on the surface of the battery shell, which is parallel to the height direction of the battery shell, and the first pole column is connected with the first pole lug part through the first switching part; the distance between one winding opening end of the first pole lug part and the second pole lug part and the inner surface of the battery shell opposite to the winding opening end is a, the distance between the other winding opening end and the inner surface of the battery shell opposite to the winding opening end is b, a/b is more than or equal to 10 and less than or equal to 100, and the space between one end of the battery cell, from which the first pole lug part and the second pole lug part are led out, and the battery shell is larger than the space between the other end of the battery cell and the battery shell. Therefore, redundant electrolyte can be stored in the space between one end of the battery cell, which leads out the first electrode lug part and the second electrode lug part, and the battery shell, and if the electrolyte needs to be infiltrated on one side of the electrode plate, which is close to the first electrode lug part and the second electrode lug part, the electrolyte stored in the space can quickly reach the position of the electrode plate to be infiltrated, so that the infiltration efficiency and the infiltration effect of the electrolyte can be improved.

Meanwhile, the battery is large in length, vibration impact can be received in the daily use process, and the battery shell after the vibration impact can deform. The side of the battery case adjacent to the first and second tab portions is not normally fixed with glue, resulting in a large deformation of the side case. When a/b is less than or equal to 10 and less than or equal to 100, the space between one end of the battery cell, which is led out of the first pole lug part and the second pole lug part, and the battery shell can be enlarged, when the shell on one side of the battery shell, which is close to the first pole lug part and the second pole lug part, is greatly deformed, the larger space can give a larger buffer area to the deformed shell, so that the damage probability of the battery caused by extrusion of the deformed shell can be reduced, and the damage probability of the battery is effectively reduced.

In addition, after the first pole is arranged on one surface of the battery shell, which is perpendicular to the length direction of the battery shell, the first pole can be prevented from occupying the space of the battery in the height direction, so that the space utilization rate of the battery in the height direction is improved, and the energy density of the battery is improved.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated 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, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:

fig. 1 is a schematic view showing a structure of a battery according to an exemplary embodiment;

fig. 2 is a schematic cross-sectional structure of a battery according to an exemplary embodiment;

fig. 3 is a schematic diagram of a cell structure according to an exemplary embodiment.

The reference numerals are explained as follows:

10. a battery case; 11. a first surface; 12. a second surface; 13. a third surface; 20. a battery cell; 21. winding the open end; 22. a first tab portion; 23. a second pole ear; 30. a first pole; 40. a first transfer section; 41. a first portion; 42. a second portion; 50. a second post; 60. a second switching part; 61. a third section; 62. and a fourth part.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

An embodiment of the present utility model provides a battery, as shown in fig. 1 to 3, including: the battery case 10, the battery case 10 has a length direction A and a height direction B, the length of the battery case 10 is L, and L is more than or equal to 300mm and less than or equal to 800mm; the battery cell 20 is arranged in the battery shell 10, the battery cell 20 is a winding type battery cell 20, winding open ends 21 are formed at two opposite ends of the battery cell 20, a plane where the winding open ends 21 are located is opposite to a surface where the length direction A of the battery shell 10 is located, a first electrode lug part 22 and a second electrode lug part 23 with opposite polarities are led out from the same end of the battery cell 20, and the first electrode lug part 22 and the second electrode lug part 23 which are arranged at intervals are led out along the same winding open end 21; a first pole 30, the first pole 30 being disposed on a surface of the battery case 10 parallel to the height direction B of the battery case 10; a first transfer portion 40, the first pole 30 being connected to the first pole ear 22 by the first transfer portion 40; wherein, the distance between one winding opening end 21 with the first pole lug part 22 and the second pole lug part 23 led out and the inner surface of the battery shell 10 opposite to the winding opening end is a, and the distance between the other winding opening end 21 and the inner surface of the battery shell 10 opposite to the winding opening end is b, and a/b is more than or equal to 10 and less than or equal to 100.

The battery according to one embodiment of the utility model comprises a battery shell 10 and a battery core 20, wherein the battery core 20 is arranged in the battery shell 10, the battery shell 10 is provided with a length direction A and a height direction B, the length of the battery shell 10 is L, L is more than or equal to 300mm and less than or equal to 800mm, namely the battery is a battery with a relatively large length, the battery core 20 is a winding type battery core 20, and a plane of a winding opening end 21 of the battery core 20 is opposite to the surface of the battery shell 10 in the length direction A, so that the winding opening end 21 of the winding type battery core 20 is opposite to the surface of the battery in the length direction A, the wetting rate of electrolyte is obviously increased, the overall energy density of the battery can be ensured, the production efficiency is obviously improved, and the electronic transmission path is shortened, thereby improving the service performance of the battery.

In addition, the battery of the present embodiment further includes a first tab portion 22, a second tab portion 23, a first post 30 and a first switching portion 40, the first tab portion 22 and the second tab portion 23 are led out from the same end of the battery cell 20, and the first tab portion 22 and the second tab portion 23 which are disposed at intervals are led out along the same winding opening end 21, the first post 30 is disposed on a surface of the battery case 10 parallel to the height direction B of the battery case 10, and the first post 30 is connected to the first tab portion 22 through the first switching portion 40; wherein, the distance between one winding opening end 21 with the first pole lug part 22 and the second pole lug part 23 led out and the inner surface of the battery shell 10 opposite to the winding opening end is a, the distance between the other winding opening end 21 and the inner surface of the battery shell 10 opposite to the winding opening end is b, and a/b is less than or equal to 10 and less than or equal to 100, so that the space between one end of the first pole lug part 22 and the second pole lug part 23 of the battery cell 20 led out and the battery shell 10 is larger than the space between the other end of the battery cell 20 and the battery shell 10. Therefore, the redundant electrolyte can be stored in the space between the battery cell 20 and the battery shell 10 at the end of the battery cell 20 from which the first electrode lug 22 and the second electrode lug 23 are led out, and if the electrolyte needs to be infiltrated at the side of the electrode plate close to the first electrode lug 22 and the second electrode lug 23, the electrolyte stored in the space can quickly reach the position of the electrode plate to be infiltrated, so that the infiltration efficiency and the infiltration effect of the electrolyte can be improved.

Meanwhile, since the length of the battery is large, vibration impact is received during daily use, and the battery case 10 after the vibration impact is deformed. The side of the battery case 10 adjacent to the first and second tab portions 22 and 23 is not normally fixed by gluing, resulting in a large deformation amount of the case at that side. When a/b is less than or equal to 10 and less than or equal to 100, the space between one end of the battery cell 20, which is led out of the first pole lug part 22 and the second pole lug part 23, and the battery shell 10 can be enlarged, when the shell on one side of the battery shell 10, which is close to the first pole lug part 22 and the second pole lug part 23, is greatly deformed, the larger space can give a larger buffer area to the deformed shell, so that the damage to the battery cell 20 due to the extrusion of the deformed shell can be reduced, and the damage probability of the battery is effectively reduced.

In addition, after the first pole 30 is disposed on one surface of the battery case 10 perpendicular to the length direction a of the battery case 10, the first pole 30 can be prevented from occupying the space of the battery in the height direction B, thereby improving the space utilization of the battery in the height direction B and thus improving the energy density of the battery.

The battery includes a cell 20 and an electrolyte, and is capable of performing a minimum unit of electrochemical reaction such as charge/discharge. The battery cell 20 is a unit formed by winding a stacked portion including a first electrode sheet, a separator, and a second electrode sheet. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. Wherein the polarities of the first pole piece and the second pole piece can be interchanged. The first and second pole pieces are coated with an active substance.

As shown in fig. 3, the wound cell 20 is obtained by winding a first pole piece, a second pole piece opposite to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece on a winding needle. Of course, in certain embodiments, it is not precluded that the membrane sheet may be removed.

Referring to fig. 2, the length of the battery case 10 is L,300mm is less than or equal to L is less than or equal to 800mm, that is, the length of the battery case 10 is larger, the battery cell 20 is disposed in the battery case 10, when only one battery cell 20 is disposed in the battery case 10 along the length direction a of the battery case 10, the length of the battery cell 20 is larger, and considering that the plane of the winding opening end 21 of the battery cell 20 is opposite to the surface of the battery case 10 along the length direction a, at this time, the large-sized winding battery cell 20 may be wound along the length direction a of the battery cell 20, and the winding needle is thickened, and is compressed after winding to form the battery cell 20.

After the winding-type battery cell 20 is wound by the winding needle, the winding needle is removed to form a winding-type core hole, and after the battery cell 20 is compressed, the winding-type core hole is compressed, at this time, the upper end and the lower end of the original winding-type core hole can be regarded as forming two opposite winding open ends 21, and after the battery cell 20 is assembled into the battery case 10, the plane of the winding open ends 21 is opposite to the surface of the battery case 10 in the length direction a, that is, the winding open ends 21 face the wall surface extending along the length direction a of the battery case 10, for example, when the battery is a quadrangular battery, the wall surface extending along the length direction a may be four, and the two opposite winding open ends 21 may face the two opposite wall surfaces respectively.

In one embodiment, the plane of the winding open end 21 is parallel to the length direction a, so that a battery cell 20 with a relatively neat structure can be obtained, and the service performance of the battery cell 20 is improved.

The battery case 10 and the battery cell 20 shown in fig. 1 and 3, the battery cell 20 is a winding type battery cell 20, and the winding type battery cell 20 may be formed with a winding open end 21.

As shown in fig. 2, the battery case 10 has a length direction a and a height direction B, the length of the battery case 10 may be expressed as L, and the height of the battery case 10 may be expressed as W, 2.ltoreq.l/w.ltoreq.10, so that the battery may be a battery having a relatively large length, not only the capacity of the battery may be ensured, but also the grouping of subsequent batteries may be facilitated, thereby improving the use performance of the battery.

In one embodiment, 300 mm.ltoreq.L.ltoreq.800 mm,80 mm.ltoreq.W.ltoreq.150 mm.

In one embodiment, the thickness of the battery cell 20 is equal to or greater than 20mm, that is, the thickness of the battery cell 20 is relatively greater, and the battery cell 20 is a coiled battery cell 20, so that the battery cell is not only convenient to mold, but also has the risk of larger internal resistance and cold welding compared with the laminated battery cell 20 with larger thickness, and the coiled battery cell 20 in the embodiment can obtain the battery cell 20 with larger thickness, and can avoid the risk of larger internal resistance and cold welding of the battery cell, thereby improving the safe service performance of the battery, and ensuring the high performance of the battery.

The thickness of the battery cell 20 refers to a dimension along the compression direction of the battery cell 20, i.e., the number of layers in which the battery cell 20 is wound is relatively large, so that the capacity of the battery can be ensured.

In one embodiment, the same end of the battery cell 20 is led out with the first tab portion 22 and the second tab portion 23 with opposite polarities, the first tab portion 22 and the second tab portion 23 may be disposed at intervals, and the first tab portion 22 and the second tab portion 23 are led out along the same winding open end 21, that is, one winding open end 21 of the battery cell 20 may be led out with the first tab portion 22 and the second tab portion 23, so that the height space of the battery case 10 may be reduced, and thus the space utilization of the battery may be improved.

In one embodiment, the first and second tab portions 22 and 23 may be spaced apart along the length direction a of the battery case 10, and the first and second tab portions 22 and 23 may be located at opposite sides of the center line of the winding open end 21, respectively.

In one embodiment, the distance between one winding opening end 21 from which the first and second tab parts 22 and 23 are led and the inner surface of the battery case 10 opposite thereto is a, the distance between the other winding opening end 21 and the inner surface of the battery case 10 opposite thereto is b,10 < a/b < 100, and the space between one end of the first and second tab parts 22 and 23 and the battery case 10, from which the battery cell 20 is led, can be made larger than the space between the other end of the battery cell 20 and the battery case 10. Therefore, the redundant electrolyte can be stored in the space between the battery cell 20 and the battery shell 10 at the end of the battery cell 20 from which the first electrode lug 22 and the second electrode lug 23 are led out, and if the electrolyte needs to be infiltrated at the side of the electrode plate close to the first electrode lug 22 and the second electrode lug 23, the electrolyte stored in the space can quickly reach the position of the electrode plate to be infiltrated, so that the infiltration efficiency and the infiltration effect of the electrolyte can be improved.

Meanwhile, since the length of the battery is large, vibration impact is received during daily use, and the battery case 10 after the vibration impact is deformed. The side of the battery case 10 adjacent to the first and second tab portions 22 and 23 is not normally fixed by gluing, resulting in a large deformation amount of the case at that side. When a/b is less than or equal to 10 and less than or equal to 100, the space between one end of the battery cell 20, which is led out of the first pole lug part 22 and the second pole lug part 23, and the battery shell 10 can be enlarged, when the shell on one side of the battery shell 10, which is close to the first pole lug part 22 and the second pole lug part 23, is greatly deformed, the larger space can give a larger buffer area to the deformed shell, so that the damage to the battery cell 20 due to the extrusion of the deformed shell can be reduced, and the damage probability of the battery is effectively reduced.

In one embodiment, 3 mm.ltoreq.a.ltoreq.10 mm, for example: a may be 3mm, 5mm, 7mm, 9mm, 10mm, etc., so that it is possible to prevent the problem of the decrease in strength of the battery case 10 due to the excessively large distance while ensuring that the battery cell 20 is spaced apart from the battery case 10 by a large distance from one end of the first and second tab portions 22 and 23, and also to prevent the problem of the excessively high overall height of the battery, resulting in the excessively large weight of the battery, and inconvenient subsequent grouping.

In one embodiment, 0.1 mm.ltoreq.b.ltoreq.0.3 mm, e.g.: b can be 0.1mm, 0.2mm, 0.3mm etc. to can prevent that the distance between battery cell 20's the one end that keeps away from first utmost point ear 22 and second utmost point ear 23 and battery case 10 is too little, and lead to battery case 10 can't cushion the problem after the deformation, just can guarantee that battery case 10 can not cause the injury to battery cell 20 after the deformation. At the same time, it is also ensured that the end of the cell 20 remote from the first and second tab portions 22, 23 is sufficiently spaced from the battery case 10 to store excess electrolyte.

In one embodiment, as shown in fig. 1 and 2, the battery case 10 is substantially rectangular, the battery case 10 includes two opposite first surfaces 11, two second surfaces 12, and two third surfaces 13, the first surfaces 11 have an area larger than that of the second surfaces 12, the second surfaces 12 have an area larger than that of the third surfaces 13, the length direction a is perpendicular to the third surfaces 13, the height direction B is perpendicular to the second surfaces 12, and the thickness direction is perpendicular to the first surfaces 11, so that the battery can be a battery having a relatively large ratio of length to height, thereby improving the capacity of the battery, and grouping of subsequent batteries can be facilitated, thereby improving the battery grouping capacity, thereby improving the space utilization of the battery pack.

The opposite two winding open ends 21 of the cells 20 may face the opposite two second surfaces 12. Namely: the distance between one end of the first and second tab portions 22 and 23 of the battery cell 20 and the adjacent second surface 12 is greater than the distance between the other end of the battery cell 20 and the adjacent second surface 12. A larger space can be provided between the end of the cell 20 that exits the first and second tab portions 22, 23 and the second surface 12 adjacent thereto.

In one embodiment, the plane of the winding opening end 21 of the battery cell 20 is parallel to the second surface 12, so that a battery cell 20 with a relatively neat structure can be obtained, and the service performance of the battery cell 20 is improved.

As shown in fig. 2, the battery further includes a first pole 30, and the first pole 30 may be disposed on a surface of the battery case 10 parallel to the height direction B of the battery case 10, so that the first pole 30 may be located at a side of the battery, and may save space of the battery in the height direction B, and provide space utilization of the battery in the height direction B, so as to increase energy density of the battery. Meanwhile, the connection of the subsequent first pole 30 and other battery structures can be facilitated, and the subsequent battery grouping is also facilitated.

In one embodiment, the first pole 30 is disposed on one surface of the battery case 10 perpendicular to the length direction a of the battery case 10, that is: the first pole 30 may be disposed on a third surface 13.

In one embodiment, the distance between the first pole 30 and the first pole ear 22 is less than the distance between the first pole 30 and the second pole ear 23, namely: first pole 30 can be disposed on third surface 13 adjacent first pole ear 22.

The battery also includes a first tab portion 40 through which the first post 30 is connected to the first tab portion 22. The first transfer portion 40 includes a first portion 41 and a second portion 42, the first portion 41 and the second portion 42 are connected, and the first portion 41 and the second portion 42 are connected to the first tab portion 22 and the first pole 30, respectively. Wherein the first portion 41 is parallel to the plane of the winding opening end 21, and the second portion 42 is perpendicular to the plane of the winding opening end 21, that is: the first switching part 40 may have an L-shaped structure, so that the space occupied by the first switching part 40 may be reduced as much as possible, and the space utilization of the battery may be improved to improve the energy density of the battery.

However, the first portion 41 and the winding opening end 21 may not be parallel to each other, and the second portion 42 and the winding opening end 21 may not be perpendicular to each other, so long as the first tab portion 22 and the first tab 30 are connected.

As shown in fig. 2, the battery further includes a second post 50, and the second post 50 may be disposed on a surface of the battery case 10 parallel to the height direction B of the battery case 10, so that the second post 50 may be located at a side of the battery to further save space of the battery in the height direction B and further provide space utilization of the battery in the height direction B to further increase energy density of the battery. At the same time, the connection of the subsequent second pole 50 with other battery structures can be facilitated, and the subsequent battery grouping is also facilitated.

In one embodiment, the first and second poles 30 and 50 may be located on opposite surfaces of the battery case 10, respectively, such that the first and second poles 30 and 50 are drawn out from both sides of the battery case 10, facilitating the grouping of the subsequent batteries.

In one embodiment, the second pole 50 may be disposed on a surface of the battery case 10 perpendicular to the longitudinal direction a of the battery case 10, that is: the second pole 50 may be disposed on another third surface 13 of the battery case 10.

In one embodiment, the distance between the second pole 50 and the second pole ear 23 is less than the distance between the second pole 50 and the first pole ear 22, i.e.: the second post 50 may be disposed on the third surface 13 proximate the second ear 23.

The battery further includes a second adapter 60, and the second pole 50 is connected to the second pole ear 23 through the second adapter 60. The second adapter 60 includes a third portion 61 and a fourth portion 62, the third portion 61 and the fourth portion 62 being connected, and the third portion 61 and the fourth portion 62 being connected to the second pole ear 23 and the second pole 50, respectively. Wherein the third portion 61 is parallel to the plane of the winding opening 21 and the fourth portion 62 is perpendicular to the plane of the winding opening 21, i.e.: the second adapting part 60 may have an L-shaped structure, so that the space occupied by the second adapting part 60 can be reduced as much as possible, and the space utilization rate of the battery can be further improved, so as to further improve the energy density of the battery.

However, the third portion 61 and the winding opening end 21 may not be parallel to each other, and the fourth portion 62 and the winding opening end 21 may not be perpendicular to each other, so long as the connection between the second pole ear 23 and the second pole 50 is achieved.

It should be noted that in some embodiments, it is not excluded that the first pole 30 and the second pole 50 may be disposed on the same surface, for example, the first pole 30 and the second pole 50 may be both disposed on the first surface 11.

In one embodiment, the battery may be a square battery, that is, the battery may be a quadrangular battery, where the quadrangular battery mainly refers to a prismatic shape, but it is not strictly limited whether each side of the prism is necessarily a strictly defined straight line, and corners between sides are not necessarily right angles, and may be arc transitions.

An embodiment of the present utility model also provides a battery pack including the above battery.

The battery pack of the utility model comprises a battery, referring to fig. 1 to 3, the battery comprises a battery shell 10 and a battery core 20, the battery core 20 is arranged in the battery shell 10, the battery shell 10 is provided with a length direction A and a height direction B, the length of the battery shell 10 is L, the length of the battery is more than or equal to 300mm and less than or equal to 800mm, namely, the battery is a battery with a relatively large length, the battery core 20 is a winding type battery core 20, and the plane of a winding opening end 21 of the battery core 20 is opposite to the surface of the battery shell 10 in the length direction A, so that the winding opening end 21 of the winding type battery core 20 is opposite to the surface of the battery in the length direction A, the infiltration rate of electrolyte is obviously increased, the overall energy density of the battery can be ensured, the production efficiency is obviously improved, and the electronic transmission path is facilitated to be shortened, thereby improving the service performance of the battery.

In addition, the battery of the present embodiment further includes a first tab portion 22, a second tab portion 23, a first post 30 and a first switching portion 40, the first tab portion 22 and the second tab portion 23 are led out from the same end of the battery cell 20, and the first tab portion 22 and the second tab portion 23 which are disposed at intervals are led out along the same winding opening end 21, the first post 30 is disposed on a surface of the battery case 10 parallel to the height direction B of the battery case 10, and the first post 30 is connected to the first tab portion 22 through the first switching portion 40; wherein, the distance between one winding opening end 21 with the first pole lug part 22 and the second pole lug part 23 led out and the inner surface of the battery shell 10 opposite to the winding opening end is a, the distance between the other winding opening end 21 and the inner surface of the battery shell 10 opposite to the winding opening end is b, and a/b is less than or equal to 10 and less than or equal to 100, so that the space between one end of the first pole lug part 22 and the second pole lug part 23 of the battery cell 20 led out and the battery shell 10 is larger than the space between the other end of the battery cell 20 and the battery shell 10. Therefore, the redundant electrolyte can be stored in the space between the battery cell 20 and the battery shell 10 at the end of the battery cell 20 from which the first electrode lug 22 and the second electrode lug 23 are led out, and if the electrolyte needs to be infiltrated at the side of the electrode plate close to the first electrode lug 22 and the second electrode lug 23, the electrolyte stored in the space can quickly reach the position of the electrode plate to be infiltrated, so that the infiltration efficiency and the infiltration effect of the electrolyte can be improved.

Meanwhile, since the length of the battery is large, vibration impact is received during daily use, and the battery case 10 after the vibration impact is deformed. The side of the battery case 10 adjacent to the first and second tab portions 22 and 23 is not normally fixed by gluing, resulting in a large deformation amount of the case at that side. When a/b is less than or equal to 10 and less than or equal to 100, the space between one end of the battery cell 20, which is led out of the first pole lug part 22 and the second pole lug part 23, and the battery shell 10 can be enlarged, when the shell on one side of the battery shell 10, which is close to the first pole lug part 22 and the second pole lug part 23, is greatly deformed, the larger space can give a larger buffer area to the deformed shell, so that the damage to the battery cell 20 due to the extrusion of the deformed shell can be reduced, and the damage probability of the battery is effectively reduced.

In addition, after the first pole 30 is disposed on one surface of the battery case 10 perpendicular to the length direction a of the battery case 10, the first pole 30 can be prevented from occupying the space of the battery in the height direction B, thereby improving the space utilization of the battery in the height direction B and thus improving the energy density of the battery.

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

The battery module includes a plurality of batteries, and the battery can be square battery, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixed a plurality of batteries.

The battery pack comprises a plurality of batteries and a battery box body, wherein the battery box body is used for fixing the plurality of batteries.

It should be noted that the battery pack includes a plurality of batteries, and the plurality of batteries are disposed in the battery case. The batteries can form a battery module and then are arranged in the battery box body. Or, a plurality of batteries can be directly arranged in the battery box body, namely, the batteries do not need to be grouped, and the batteries are fixed by the battery box body.

In one embodiment, the battery pack further comprises a bottom plate, the battery is arranged on the bottom plate, the length direction A of the battery is parallel to the large surface of the bottom plate, the height direction B of the battery is perpendicular to the large surface of the bottom plate, and therefore the battery can be reliably arranged on the bottom plate, and the safety and stability performance of the battery pack are improved.

In one embodiment, the plurality of cells are stacked in the thickness direction of the cells, so that the large surfaces of the respective cells may be formed in a stack, thereby improving the grouping efficiency of the cells and improving the space utilization of the battery pack.

In one embodiment, the battery pack further includes a battery case in which a plurality of batteries are disposed, thereby achieving reliable fixation of the plurality of batteries, the battery pack may be mounted on a vehicle, or the battery pack may be used for energy storage or the like. The bottom plate may be a bottom structure of the battery case, or the bottom plate may be a partition structure for partitioning a first space for placing the battery and a second space for exhausting gas in the battery case, which is not limited herein, and the final batteries are all disposed on the bottom plate.

It should be noted that in some embodiments, it is not excluded that the battery case may comprise only a bottom plate, for example, when the battery pack is used for energy storage.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (14)

1. A battery, comprising:

the battery comprises a battery shell (10), wherein the battery shell (10) is provided with a length direction and a height direction, the length of the battery shell (10) is L, and L is more than or equal to 300mm and less than or equal to 800mm;

the battery cell (20), the battery cell (20) is arranged in the battery shell (10), the battery cell (20) is a winding type battery cell, winding open ends (21) are formed at two opposite ends of the battery cell (20), a plane where the winding open ends (21) are located and a surface where the length direction of the battery shell (10) is located are arranged oppositely, a first lug part (22) and a second lug part (23) with opposite polarities are led out from the same end of the battery cell (20), and the first lug part (22) and the second lug part (23) which are arranged at intervals are led out along the same winding open end (21);

a first pole (30), wherein the first pole (30) is arranged on the surface of the battery shell (10) parallel to the height direction of the battery shell (10);

a first transfer portion (40), through which the first pole (30) is connected to the first pole ear (22);

wherein a distance between one winding opening end (21) from which the first tab part (22) and the second tab part (23) are led and the inner surface of the battery case (10) opposite thereto is a, and a distance between the other winding opening end (21) and the inner surface of the battery case (10) opposite thereto is b, and a/b is 10-100.

2. The battery of claim 1, wherein 3mm +.a +.10 mm.

3. The cell of claim 1, wherein 0.1 mm.ltoreq.b.ltoreq.0.3 mm.

4. The battery according to claim 1, wherein the first pole (30) is provided on a surface of the battery case (10) perpendicular to a longitudinal direction of the battery case (10).

5. The battery of claim 1, wherein the battery further comprises:

a second pole (50), wherein the second pole (50) is arranged on the surface of the battery shell (10) parallel to the height direction of the battery shell (10);

and the second pole (50) is connected with the second pole lug (23) through the second switching part (60).

6. The battery according to claim 5, wherein the first and second tab portions (22, 23) are disposed at intervals along the longitudinal direction of the battery case (10), the first and second tab portions (22, 23) being located on opposite sides of the center line of the winding open end (21), respectively.

7. The battery according to claim 6, wherein the first and second poles (30, 50) are located on opposite surfaces of the battery case (10), respectively.

8. The battery according to claim 1, wherein the first transfer portion (40) includes a first portion (41) and a second portion (42), the first portion (41) being connected to the second portion (42), the first portion (41) and the second portion (42) respectively connecting the first tab portion (22) and the first post (30);

wherein the first portion (41) is parallel to the plane of the winding open end (21), and the second portion (42) is perpendicular to the plane of the winding open end (21).

9. The battery according to claim 1, wherein the battery case (10) further has a thickness direction, the battery case (10) includes two opposing first surfaces (11), two second surfaces (12), and two third surfaces (13), the first surfaces (11) have an area larger than that of the second surfaces (12), the second surfaces (12) have an area larger than that of the third surfaces (13), the length direction is perpendicular to the third surfaces (13), the height direction is perpendicular to the second surfaces (12), and the thickness direction is perpendicular to the first surfaces (11);

wherein the plane of the winding open end (21) is parallel to the second surface (12).

10. The battery according to claim 9, characterized in that the first pole (30) is arranged on one of the third surfaces (13).

11. The battery according to claim 1, wherein the height of the battery case (10) is W, 2.ltoreq.l/w.ltoreq.10.

12. The battery of claim 1, wherein the battery is a quadrangular type battery.

13. A battery pack comprising the battery of any one of claims 1 to 12.

14. The battery pack according to claim 13, wherein the cells are plural, and plural cells are stacked in a thickness direction of the cells.