CN219643080U - Battery cell, battery module and vehicle - Google Patents

Abstract

The utility model discloses a battery monomer, a battery module and a vehicle, wherein the battery monomer comprises the following components: the shell assembly is provided with a pole; the pole core is arranged in the shell assembly, the end part of the pole core is provided with a pole lug, the pole lug is suitable for being electrically connected with the pole post, the pole core comprises two oppositely arranged first surfaces, and the area of the first surfaces is larger than that of the other surfaces of the pole core; the two insulating films are respectively attached to the two first surfaces, and the side edges of the same side of the two insulating films are connected in a lap joint mode in the width direction of the pole core so as to insulate the pole core from the shell component. According to the battery cell, the electrode core and the shell assembly can be separated through the insulating film, so that insulation between the electrode core and the shell assembly is achieved, the insulating film is respectively connected with the electrode core and the shell assembly in an adhesive mode, flatness of the insulating film and complete fit with the electrode core can be fully guaranteed, and failure of the insulating film is avoided.

Description

Battery cell, battery module and vehicle

Technical Field

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

Background

Among all energy forms, electric energy is the most easy to use, cleanest, environment-friendly and most efficient, and a battery is the best device for storing electric energy, and is widely applied to daily life of people and has important influence on the life of people. With the progressive development of battery technology, batteries with good performance are increasingly pursued.

Wherein, need set up insulation system between the utmost point core of battery and the shell in order to realize the insulation between utmost point core and the casing, but insulation system's among the related art setting between utmost point core and the casing can not fully guarantee the roughness of insulating film and with the laminating completely of utmost point core, the manufacturing process is liable to appear scraping, causes the insulating film inefficacy, exists the improvement space.

Disclosure of Invention

The present utility model is directed to solving at least one of the technical problems existing in the related art. Therefore, an object of the present utility model is to provide a battery cell, which realizes insulation between a pole core and a housing assembly, and enhances insulation stability between the pole core and the housing assembly.

According to an embodiment of the present utility model, a battery cell includes: the shell assembly is provided with a pole; the pole core is arranged in the shell assembly, a pole lug is arranged at the end part of the pole core and is suitable for being electrically connected with the pole post, the pole core comprises two oppositely arranged first surfaces, and the area of each first surface is larger than that of the rest surfaces of the pole core; the two insulating films are respectively attached to the two first surfaces, and the two side edges of the same side of each insulating film are connected in a lap joint mode in the width direction of the pole core so as to insulate the pole core from the shell component.

According to the battery cell provided by the embodiment of the utility model, the two insulating films are respectively attached to the first surface of the pole core, and the two insulating films are connected with each other in an overlapping manner on the same side edge in the width direction of the pole core, so that the pole core and the shell component can be separated by the insulating films to realize insulation between the pole core and the shell component, the insulation stability between the pole core and the shell component is enhanced, the insulating films are respectively bonded and connected with the pole core and the shell component, the flatness of the insulating films and the complete attachment of the insulating films to the pole core can be fully ensured, and the insulating films are prevented from losing efficacy.

According to the battery cell of some embodiments of the present utility model, the width of the pole core is set to W1, and the thickness of the pole core is set to T1; in the width direction parallel to the pole core, the value range of the width of the insulating film is as follows: W1+T1 to W1+2T1.

According to some embodiments of the utility model, the thickness of the insulating film is in the range of: 0.03mm to 0.2mm.

According to some embodiments of the utility model, the insulating film is bonded to an inner sidewall of the case assembly to fixedly connect the electrode core to the case assembly.

According to some embodiments of the utility model, the housing assembly comprises a housing body and a cover plate, the cover plate is arranged at two ends of the housing body in the length direction of the pole core so as to define a containing cavity for placing the pole core, and the pole is arranged on the cover plate.

According to the battery cell of some embodiments of the present utility model, in a length direction parallel to the pole core, a length of the pole core is L1, a length of the case body is L2, and a length of the insulating film is L3, which satisfies: l1 is more than or equal to L3 and less than or equal to L2-2mm.

According to the battery cell of some embodiments of the present utility model, in the width direction of the pole core, two supporting portions are disposed on the inner side of the cover plate, the supporting portions are abutted against the pole core, and an avoidance space is defined between the two supporting portions.

According to the battery cell of some embodiments of the present utility model, in a width direction parallel to the pole core, a width of the pole core is set to W1, and a support width of the support portion is set to L4, which satisfies: l4 is less than or equal to 1/3W1.

According to some embodiments of the utility model, in a direction parallel to the length direction of the pole core, the length of the insulating film is L3, and the distance between two space rings respectively located at two ends of the pole core is L5, so that: l3-6mm is less than or equal to L5 and less than or equal to L3.

According to the battery cell of some embodiments of the present utility model, in a direction parallel to the thickness direction of the electrode core, the thickness of the electrode core is set to T1, the thickness of the accommodating cavity is set to T3, and the width of the spacer is set to W3, so that: t1-2mm is less than or equal to W3 and less than or equal to T3.

The utility model also provides a battery module.

The battery module comprises a box body; the battery cell according to any one of the embodiments, wherein the battery cell is disposed in the case.

The utility model further provides a vehicle.

The vehicle according to an embodiment of the present utility model includes the battery module according to any one of the above embodiments.

The advantages of the vehicle, the battery module and the battery cell are the same as those of the battery cell in the related art, and are not described in detail herein.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic view of a battery cell according to some embodiments of the utility model;

fig. 2 is an exploded view of the battery cell shown in fig. 1;

fig. 3 is a schematic view of the two insulating films shown in fig. 2 before being mounted to a pole piece;

fig. 4 is a schematic view of the two insulating films shown in fig. 3 after being mounted to the pole piece;

fig. 5 is an enlarged view at a in fig. 4;

FIG. 6 is a schematic view of the cover shown in FIG. 2;

fig. 7 is a partial sectional view of a battery cell according to some embodiments of the present utility model along a length direction;

fig. 8 is a cross-sectional view of a battery cell according to some embodiments of the utility model along a length direction;

fig. 9 is a schematic illustration of a vehicle according to some embodiments of the utility model.

Reference numerals:

the vehicle (1000),

the battery module 200 is assembled with a battery module,

the battery cell 100 is formed of a plurality of battery cells,

the housing assembly 10, the pole 101,

the housing body 11, the cover plate 12, the supporting portion 121, the avoidance space 122,

the core 20, the first surface 201, the second surface 202,

the tab (21) is provided with a pair of tabs,

an insulating film 30.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

Hereinafter, a battery cell 100 according to an embodiment of the present utility model is described with reference to fig. 1 to 9.

As shown in fig. 1 and 2, a battery cell 100 according to an embodiment of the present utility model includes: a housing assembly 10, a pole piece 20 and two insulating films 30.

As shown in fig. 1, a pole 101 is disposed on a housing assembly 10, a pole core 20 is mounted in the housing assembly 10, a pole lug 21 is disposed at an end of the pole core 20, the pole lug 21 is suitable for being electrically connected with the pole core 101, the pole core 20 includes two oppositely disposed first surfaces 201, the area of the first surfaces 201 is larger than that of the rest surfaces of the pole core 20, two insulating films 30 are respectively attached to the two first surfaces 201, and in the width direction of the pole core 20, the sides of the same side of the two insulating films 30 are overlapped and connected to insulate the pole core 20 from the housing assembly 10.

Therefore, the pole core 20 can be installed in the shell component 10, the pole lugs 21 of the pole core 20 are electrically connected with the corresponding pole posts 101, so that the pole core 20 can supply power outwards, the two insulating films 30 are respectively attached to the first surface 201 of the pole core 20, and the two insulating films 30 are connected with one another in a lap joint mode on the same side edge of the width direction of the pole core 20, so that the pole core 20 can be separated from the shell component 10 through the insulating films 30, insulation between the pole core 20 and the shell component 10 is achieved, and insulation stability between the pole core 20 and the shell component 10 is enhanced.

For example, the pole core 20 is configured as a blade-like pole core 20, the tab 21 is located at both ends in the length direction of the pole core 20, the pole core 20 has two oppositely disposed first surfaces 201 in the thickness direction of the pole core 20, the area of the first surfaces 201 is larger than that of the remaining surfaces, i.e., the first surfaces 201 are large faces of the pole core 20, and the pole core 20 has two oppositely disposed second surfaces 202 in the width direction of the pole core 20.

In actual assembly, as shown in fig. 3 and 4, two insulating films 30 are respectively attached to two first surfaces 201 of the pole core 20, and in the width direction of the pole core 20, the width of the insulating film 30 is larger than the width of the pole core 20, so that at least part of the insulating film 30 protrudes from the pole core 20 in the width direction of the pole core 20, then the part of the side edge of the insulating film 30 protruding from the pole core 20 is bent toward the second surface 202 of the pole core 20, so that the part of the insulating film 30 protruding from the pole core 20 is attached to the second surface 202 of the pole core 20, and as shown in fig. 4 and 5, both side edges of one insulating film 30 in the width direction of the two insulating films 30 are respectively overlapped with both side edges of the other insulating film 30, that is, both side edges of the two insulating films 30 are respectively overlapped on the second surface 202 of the pole core 20.

Thus, as shown in fig. 4, the two insulating films 30 may cover the two first surfaces 201 and the two second surfaces 202 of the pole core 20, so that when the pole core 20 is installed in the housing assembly 10, the two first surfaces 201 and the two second surfaces 202 of the pole core 20 are spaced apart from the housing assembly 10 by the two insulating films 30, so as to avoid the short circuit caused by the contact between the surface of the pole core 20 and the housing assembly 10, thereby realizing the insulation between the pole core 20 and the housing assembly 10 and enhancing the insulation stability between the pole core 20 and the housing assembly 10.

It should be noted that, the insulating film 30 is made of PP/PE/PET or other polyolefin films, so as to ensure that the insulating film 30 has stable insulation, and the thickness of the insulating film 30 is thinner, so that the insulating film 30 occupies less installation space after the pole core 20 provided with the insulating film 30 is installed on the housing assembly 10, the size influence on the battery monomer 100 is reduced, the miniaturization design of the battery monomer 100 is facilitated, and the insulating film 30 is respectively adhered to the pole core 20 and the housing assembly 10, thus ensuring the flatness of the insulating film 30 and the complete adhesion of the insulating film 30 and the pole core 20, and reducing the problem of failure of the insulating film 30 caused by scraping in the manufacturing process.

According to the battery unit 100 of the embodiment of the utility model, the two insulating films 30 are respectively attached to the first surface 201 of the pole core 20, and the two insulating films 30 are connected to each other by overlapping at the same side edge of the width direction of the pole core 20, so that the pole core 20 and the housing assembly 10 can be separated by the insulating films 30, insulation between the pole core 20 and the housing assembly 10 is realized, insulation stability between the pole core 20 and the housing assembly 10 is enhanced, and the insulating films 30 are respectively bonded and connected with the pole core 20 and the housing assembly 10, so that flatness of the insulating films 30 and complete attachment to the pole core 20 can be fully ensured, and failure of the insulating films 30 is avoided.

In some embodiments, as shown in fig. 2, the width of the pole piece 20 is set to W1, and the thickness of the pole piece 20 is set to T1; in the width direction parallel to the pole piece 20, the width of the insulating film 30 has a range of values: W1+T1 to W1+2T1, wherein W1 and T1 are each mm.

For example, the width of the insulating film 30 is (w1+t1) mm, or the width of the insulating film 30 is (w1+3/2T 1) mm, or the width of the insulating film 30 is (w1+2t1) mm, that is, when the width of the insulating film 30 satisfies the above-mentioned value range, it can be ensured that the two insulating films 30 can overlap on both surfaces in the width direction of the pole core 20, and that the width of the insulating film 30 can be prevented from being excessively large, so that the influence on the size of the pole core 20 after the insulating film 30 is assembled can be reduced, and the subsequent installation of the pole core 20 in the housing assembly 10 is facilitated.

For example, the width of the insulating film 30 is (w1+2t1) mm, that is, the width of the insulating film 30 is the sum of the width of one first surface 201 and the thickness of the battery cell, at this time, the two insulating films 30 are respectively attached to the two first surfaces 201 of the pole core 20 to completely cover the two first surfaces 201, and in the width direction of the pole core 20, both sides of one insulating film 30 may protrude from the pole core 20, the width of the portion of the two sides protruding from the pole core 20 may be T1, and then the portion of the one insulating film 30 protruding from the pole core 20 is bent toward the second surface 202 of the pole core 20, so that the portion of the insulating film 30 protruding from the pole core 20 is attached to the second surface 202 of the pole core 20, and the other insulating film 30 is also disposed in the same manner, so that both sides of the one insulating film 30 may be attached to one side of the two sides of the other insulating film 30 facing away from the second surface 202 of the pole core 20.

At this time, both side edges of the two insulating films 30 overlap at the polar second surfaces 202, respectively, so that the coverage of the two second surfaces 202 of the pole core 20 can be achieved.

Thus, the pole core 20 and the housing assembly 10 can be spaced apart by the insulating film 30 to achieve insulation between the pole core 20 and the housing assembly 10, enhancing insulation stability between the pole core 20 and the housing assembly 10.

In some embodiments, the thickness of the insulating film 30 is set to a value ranging from: 0.03mm to 0.2mm.

Therefore, the thickness of the insulating film 30 can be made smaller while the optimal insulating effect of the insulating film 30 is ensured, so that the influence of the insulating film 30 arranged on the pole core 20 on the size of the pole core 20 is reduced, and the miniaturization design of the battery cell 100 is facilitated.

For example, the thickness of the insulating film 30 is 0.05mm, or the thickness of the insulating film 30 is 0.1mm, or the thickness of the insulating film 30 is 0.12mm, that is, when the thickness of the insulating film 30 is taken within the above-mentioned range, it is possible to make the thickness of the insulating film 30 smaller while ensuring the optimal insulating effect of the insulating film 30, thereby reducing the influence of the insulating film 30 provided on the size of the electrode core 20 by the electrode core 20, and facilitating the miniaturization design of the battery cell 100.

In some embodiments, an insulating film 30 is bonded to the inside wall of the housing assembly 10 to fixedly connect the pole core 20 to the housing assembly 10.

Thereby, the insulating film 30 may be adhesively connected to the inner sidewall of the case assembly 10 to fix the pole core 20 into the case assembly 10, thereby enhancing the stability of the pole core 20.

For example, the insulating film 30 is a thermal composite film, the insulating film 30 is tightly attached to the pole core 20, the insulating film 30 is bonded with the aluminum shell, the fixing of the pole core 20 is further enhanced, so that the mechanical vibration impact resistance of the pole core 20 is ensured, and meanwhile, the insulating film 30 is not required to be thermally fused on the pole core 20, so that the structure of the battery core can be simplified, and the production cost is reduced.

In some embodiments, as shown in fig. 2, the housing assembly 10 includes a housing body 11 and a cover plate 12, and in the length direction of the pole core 20, both ends of the housing body 11 are provided with the cover plate 12 to define a receiving cavity for placing the pole core 20, and the pole post 101 is provided on the cover plate 12.

For example, as shown in fig. 2, the case assembly 10 includes a case body 11 and cover plates 12, the case body 11 is configured in a square cylinder shape, both ends of the case body 11 in the length direction are respectively formed with open openings, the cover plates 12 are provided in two, the two cover plates 12 are respectively mounted at the two open openings of the case body 11 to close the open openings, the case body 11 and the cover plates 12 define a sealed accommodation chamber, the pole pieces 20 are mounted in the accommodation chamber, each cover plate 12 is provided with a pole post 101, the pole posts 101 penetrate the cover plates 12 in the thickness direction, and the pole posts 101 are electrically connected with the pole lugs 21 of pole pieces of the same polarity, so that the pole pieces 20 can supply power to the outside.

Through the arrangement, the processing difficulty of the battery cell 100 is reduced, and the reliability of the battery cell 100 is improved.

In some embodiments, as shown in fig. 2, in the length direction parallel to the pole core 20, the length of the pole core 20 is L1, the length of the case body 11 is L2, and the length of the insulating film 30 is L3, satisfying: l1 is more than or equal to L3 and less than or equal to L2-2mm. Wherein, the units of L1 and L2 are both mm.

For example, L1 is less than or equal to L3 is less than or equal to L2-2.1mm, or L1 is less than or equal to L3 is less than or equal to L2-2.2mm, or L1 is less than or equal to L3 is less than or equal to L2-2.3mm, namely, when L3 meets the value range, the length of the insulating film 30 is greater than the length of the pole core 20, so that the insulating film 30 can be ensured to fully cover the first surface 201 and the second surface of the pole core 20, the insulativity between the pole core 20 and the shell body 11 is ensured, the length of the insulating film 30 is less than the length of the shell body 11, so that the installation space of the cover plate 12 is reserved, when the cover plate 12 is installed on the shell body 11, the cover plate 12 can be positioned in the accommodating cavity, the installation space in the accommodating cavity can be conveniently used, and the miniaturized design of the battery cell 100 can be realized.

For example, when l1=l3, it can be ensured that the insulating film 30 can just sufficiently cover the first surface 201 and the second surface of the pole core 20 to ensure the insulation between the pole core 20 and the case body 11, and the amount of the insulating film 30 can be reduced to reduce the production cost.

Or when l1=l2-2 mm to reserve the installation space of apron 12 for apron 12 when installing on casing body 11, apron 12 can be located and hold the intracavity, so that fix apron 12, and can make full use of holds the intracavity installation space, do benefit to the miniaturized design that realizes battery cell 100, and in being on a parallel with the length direction of utmost point core 20, insulating film 30 protrusion can realize the insulation between utmost point ear 21 and the casing subassembly 10 at the both ends of the length direction of utmost point core 20, and then simplify the structure of battery cell 100.

In some embodiments, as shown in fig. 2 and 6, in the width direction of the pole core 20, two supporting portions 121 are provided on the inner side of the cover plate 12, the supporting portions 121 are abutted against the pole core 20, and a relief space 122 is defined between the two supporting portions 121.

For example, the supporting parts 121 may be constructed in a convex structure, and two convex structures protrude inside the cap plate 12, and the two supporting parts 121 of the same cap plate 12 are spaced apart in a width direction parallel to the pole core 20 to form the escape space 122, so that the two supporting parts 121 of the same cap plate 12 may be respectively located at both side positions of the tab 21 at one end of the pole core 20 and supported on the end surface of the pole core 20, and at the same time, the tab 21 may be electrically connected with the pole 101 through the escape space 122.

Therefore, the supporting part 121 can avoid the lug 21 and effectively limit the pole core 20, so that the installation stability of the pole core 20 is improved.

In some embodiments, as shown in fig. 7, in the width direction parallel to the pole core 20, the width of the pole core 20 is set to W1, the support width of the support portion 121 is set to L4, satisfying: l4 is less than or equal to 1/3W1.

For example, the supporting width l4=1/3W 1 of the supporting portion 121, or the supporting width l4=2/5W 1 of the supporting portion 121, or the supporting width l4=7/20W 1 of the supporting portion 121, that is, when the supporting width L4 of the supporting portion 121 is taken within the above range, the supporting portion 121 can effectively limit the pole core 20, so as to improve the installation stability of the pole core 20, and meanwhile, in the width direction parallel to the pole core 20, a sufficient avoiding space 122 can be ensured between the two supporting portions 121 on the same cover plate 12, so that when the pole lug 21 of the pole core 20 is electrically connected with the pole post 101, a sufficient overcurrent area of the pole core 20 can be ensured.

In some embodiments, as shown in fig. 2 and 8, in the length direction parallel to the pole core 20, the length of the insulating film 30 is set to L3, and the distance between two spacers respectively located at both ends of the pole core 20 is set to L5, satisfying: l3-6mm is less than or equal to L5 and less than or equal to L3.

For example, l5=l3, the spacer can be ensured to abut against the insulating film 30 in the longitudinal direction parallel to the pole core 20 to function as a process, or l5=l3-6 mm, the spacer can be prevented from pressing the pole core 20 when two spacers press the insulating film 30.

In some embodiments, as shown in fig. 2, in the thickness direction parallel to the pole core 20, the thickness of the pole core 20 is set to T1, the thickness of the receiving cavity is set to T3, and the width of the spacer is set to W3, satisfying: t1-2mm is less than or equal to W3 and less than or equal to T3.

For example, T1-2.1 mm.ltoreq.W3.ltoreq.T3, or T1-2.2 mm.ltoreq.W3.ltoreq.T3, or T1-2.3 mm.ltoreq.W3.ltoreq.T3, and when W3 satisfies the above-mentioned proportional relationship, the spacer can be allowed to be installed in the accommodation chamber, and the spacer can be allowed to be kept away from the insulating film 30, so as to avoid interference of the spacer with the insulating film 30.

In some embodiments, the length of pole piece 20 ranges from 400mm to 1500mm; the range of the height of the pole core 20 is 80 mm-240 mm; the thickness of the pole core 20 is 10 mm-40 mm.

For example, the pole piece 20 is configured as a blade type battery, and the length of the pole piece 20 is 500mm, the height of the pole piece 20 is 100mm, the thickness of the pole piece 20 is 10mm, or the length of the pole piece 20 is 600mm, the height of the pole piece 20 is 200mm, the thickness of the pole piece 20 is 20mm, or the length of the pole piece 20 is 1000mm, the height of the pole piece 20 is 160mm, and the thickness of the pole piece 20 is 36mm.

Namely, when the length of the pole core 20, the height of the pole core 20 and the thickness of the pole core 20 are valued in the above-mentioned range, the pole core 20 can be ensured to have enough energy density, and the size of the pole core 20 can be controlled, which is beneficial to mass production.

The utility model also provides a battery module 200.

The battery module 200 according to the embodiment of the present utility model includes a case and a plurality of battery cells 100.

The battery cell 100 is the battery cell 100 according to any one of the embodiments described above, and a plurality of battery cells 100 are provided in a case.

For example, the battery module 200 may be provided with a case and a plurality of battery cells 100, the case may be configured in a square structure, an installation cavity is formed in the case, the plurality of battery cells 100 are all installed in the installation cavity, and the plurality of battery cells 100 may be sequentially arranged or spaced apart, and the plurality of battery cells 100 are used for synchronous charging and discharging, so that the battery module may stably operate.

According to the battery module 200 of the embodiment of the utility model, the two insulating films 30 of the battery cell are respectively attached to the first surface 201 of the pole core 20, and the two insulating films 30 are connected in lap joint on the same side edge of the width direction of the pole core 20, so that the pole core 20 and the housing assembly 10 can be separated by the insulating films 30, insulation between the pole core 20 and the housing assembly 10 can be realized, and insulation stability between the pole core 20 and the housing assembly 10 can be enhanced.

The utility model also proposes a vehicle 1000.

As shown in fig. 9, a vehicle 1000 according to an embodiment of the present utility model includes the battery module 200 of any one of the above embodiments.

According to the vehicle 1000 of the embodiment of the utility model, two insulating films 30 of the battery cell 100 are respectively attached to the first surface 201 of the pole core 20, and the two insulating films 30 are connected to each other by overlapping at the same side edge of the width direction of the pole core 20, so that the pole core 20 and the housing assembly 10 can be separated by the insulating films 30 to realize insulation between the pole core 20 and the housing assembly 10, insulation stability between the pole core 20 and the housing assembly 10 is enhanced, and the insulating films 30 are respectively bonded to the pole core 20 and the housing assembly 10, so that flatness of the insulating films 30 and complete attachment to the pole core 20 can be fully ensured, and failure of the insulating films 30 is avoided.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. A battery cell (100), characterized by comprising:

a housing assembly (10), wherein a pole (101) is arranged on the housing assembly (10);

the pole piece (20), the pole piece (20) is installed in the shell component (10), a pole lug (21) is arranged at the end part of the pole piece (20), the pole lug (21) is suitable for being electrically connected with the pole post (101), the pole piece (20) comprises two oppositely arranged first surfaces (201), and the area of each first surface (201) is larger than that of the other surfaces of the pole piece (20);

the two insulating films (30), the two insulating films (30) are respectively attached to the two first surfaces (201), and the side edges of the same side of the two insulating films (30) are connected in an overlapping manner in the width direction of the pole core (20) so as to insulate the pole core (20) from the shell assembly (10).

2. The battery cell (100) of claim 1, wherein the width of the pole piece (20) is set to W1, and the thickness of the pole piece (20) is set to T1;

in the width direction parallel to the pole core (20), the value range of the width of the insulating film (30) is as follows: W1+T1 to W1+2T1.

3. The battery cell (100) according to claim 1, wherein the thickness of the insulating film (30) has a range of values: 0.03mm to 0.2mm.

4. The battery cell (100) of claim 1, wherein the insulating film (30) is bonded to an inner sidewall of the housing assembly (10) to fixedly connect the pole piece (20) to the housing assembly (10).

5. The battery cell (100) according to any one of claims 1-4, wherein the housing assembly (10) comprises a housing body (11) and a cover plate (12), the cover plate (12) being provided at both ends of the housing body (11) in a length direction of the pole core (20) to define a receiving cavity for placing the pole core (20), and the pole post (101) being provided to the cover plate (12).

6. The battery cell (100) according to claim 5, wherein the length of the pole core (20) is L1, the length of the case body (11) is L2, and the length of the insulating film (30) is L3 in a direction parallel to the length of the pole core (20), satisfying: l1 is more than or equal to L3 and less than or equal to L2-2mm.

7. The battery cell (100) according to claim 5, wherein two support portions (121) are provided on the inner side of the cap plate (12) in the width direction of the electrode core (20), the support portions (121) are stopped against the electrode core (20), and an avoidance space (122) is defined between the two support portions (121).

8. The battery cell (100) according to claim 7, wherein a width of the electrode core (20) in a width direction parallel to the electrode core (20) is set to W1, and a support width of the support portion (121) is set to L4, satisfying: l4 is less than or equal to 1/3W1.

9. The battery cell (100) according to claim 7, wherein the length of the insulating film (30) in the direction parallel to the length of the electrode core (20) is set to L3, and the distance between the two cover plates (12) respectively located at both ends of the electrode core (20) is set to L5, satisfying: l3-6mm is less than or equal to L5 and less than or equal to L3.

10. The battery cell (100) of claim 7, wherein in a thickness direction parallel to the pole core (20), a thickness of the pole core (20) is set to T1, a thickness of the receiving chamber is set to T3, and a width of the cover plate (12) is set to W3, satisfying: t1-2mm is less than or equal to W3 and less than or equal to T3.

11. A battery module (200), characterized by comprising:

a case;

-a plurality of battery cells (100), the battery cells (100) being battery cells (100) according to any one of claims 1-10, -a plurality of the battery cells (100) being provided in the housing.

12. A vehicle (1000) characterized by comprising the battery module (200) according to claim 11.