Battery monomer, battery pack and electric vehicle

Abstract

The utility model discloses a single battery, a battery pack and an electric automobile, the single battery is of a cuboid structure, the size of the single battery along a first direction is 560mm-600mm, the size of the single battery along a second direction is 100mm-140mm, the size of the single battery along a third direction is 12mm-22mm, and the size of the single battery along a fourth direction is 100mm-140mm. One end of the single battery in the first direction is provided with a positive pole, the other end is provided with a negative pole, and the first direction, the second direction and the third direction are perpendicular to one another. According to the single battery provided by the embodiment of the utility model, the single battery is of a cuboid structure and can be compactly arranged, so that the occupied space when a plurality of single batteries are arranged is reduced, and the utilization rate of the space in a battery pack is improved. The battery monomers are consistent in shape, the size and the volume of the battery monomers can be changed, and the capacity of the battery monomers can be changed by changing the size of the battery monomers to meet the use requirements of different vehicles, so that the research and development cost of the battery monomers can be reduced, and the universality of the battery monomers is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery monomer, a battery pack and an electric vehicle. Background Art

[0002] According to the packaging shape, lithium-ion batteries can be divided into cylindrical batteries, square batteries and soft-pack batteries. These three types of batteries are used in HEV (Hybrid Electric Vehicle), PHEV (Plug-in Hybrid Electric Vehicle) and BEV (Battery Electric Vehicle).

[0003] However, in order to match the envelope, size and power requirements of different battery packs, different types, capacities and wide bandwidth battery cells are needed. There are also many battery cell sizes and shapes, which makes the development and manufacturing costs of battery packs huge. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cell whose size can be platformized and standardized, which is conducive to reducing costs and can also meet the power configuration requirements of different vehicle models.

[0005] The utility model also provides a battery pack.

[0006] The utility model also provides an electric car.

[0007] According to the battery cell of the embodiment of the first aspect of the utility model, the battery cell is a rectangular structure, and the size of the battery cell along the first direction is 560mm-600mm, the size of the battery cell along the second direction is 100mm-140mm, the size of the battery cell along the third direction is 12mm-22mm, and the battery cell is provided with a positive pole at one end in the first direction and a negative pole at the other end, and the first direction, the second direction and the third direction are perpendicular to each other.

[0008] According to the battery cell of the embodiment of the utility model, the battery cell is a rectangular parallelepiped structure, and the battery cell can be arranged compactly, reducing the space occupied when multiple battery cells are arranged, and improving the utilization rate of the space in the battery pack. The shape of the battery cell is consistent, and the size of the battery cell along the first direction, the size along the second direction, and the size along the third direction can be changed. By changing the size of the battery cell, the capacity of the battery cell can be changed to meet the use requirements of different vehicles, which can reduce the research and development cost of the battery cell and improve the versatility of the battery cell.

[0009] In some embodiments, the battery cell includes a cell shell, a first top cover, a second top cover, a first top patch and a second top patch. In the first direction, the first top cover is located at one end of the cell shell, the first top patch is attached to the first top cover, the second top cover is located at the other end of the cell shell, and the first top cover is arranged opposite to the second top cover, the second top patch is attached to the second top cover, the positive electrode column is arranged on the first top cover, and the negative electrode column is arranged on the second top cover and protrudes from the second top patch.

[0010] In some embodiments, in the first direction, the positive electrode column protrudes from the first top patch by 2.8 mm-3.0 mm, and the negative electrode column protrudes from the second top patch by 2.8 mm-3.0 mm.

[0011] In some embodiments, the battery cell further includes an explosion-proof valve, which is disposed on the first top cover, and an explosion-proof valve protective film attached to the explosion-proof valve is disposed on the first top cover, and an injection port is opened on the second top cover, and the second top patch cover is disposed on the injection port.

[0012] In some embodiments, a first collection window is formed on the first top patch and extends through the thickness direction of the first top patch; and / or a second collection window is formed on the second top patch and extends through the thickness direction of the second top patch.

[0013] In some embodiments, the first top patch is provided with a first through hole to expose the positive electrode column, and a second through hole to expose the explosion-proof valve, and the first top patch is provided with a first collection window that penetrates along the thickness direction of the first top patch, and the first collection window is located between the first through hole and the second through hole; the second top patch is provided with a third through hole to expose the negative electrode column, and the second top patch is provided with a second collection window that penetrates along the thickness direction of the second top patch, and the third through hole is separated from the second collection window.

[0014] In some embodiments, the battery cell further includes an insulating film, and the insulating film is coated outside the cell shell.

[0015] A battery pack according to an embodiment of the second aspect of the present invention comprises: a battery pack shell and a battery group, wherein the battery group is located in the battery pack shell, and the battery pack comprises a plurality of battery cells according to an embodiment of the first aspect of the present invention, wherein the plurality of battery cells have equal sizes along the first direction, the plurality of battery cells have equal sizes along the second direction, the plurality of battery cells have equal sizes along the third direction or at least two of the battery cells have unequal sizes along the third direction, and at least a portion of the battery cells are arranged along the third direction to form a first battery pack.

[0016] According to the battery pack of the embodiment of the utility model, by adopting the above-mentioned battery cells, when the battery cells are arranged into a first battery group along the third direction, the battery cells can be arranged more compactly, reducing the volume of the first battery group, thereby reducing the volume of the battery pack. In addition, the positive electrode column and the negative electrode column are arranged at both ends in the first direction, and the positive electrode column and the negative electrode column can be exposed for series or parallel connection, simplifying the electrical layout inside the battery pack. Since the battery cells have the same size and shape along the first direction and the second direction, when designing the battery pack, the thickness of the battery cells and the length of the battery pack along the third direction can be changed to match the different power requirements of the battery pack, and then the internal electrical components and structural components of the battery pack can also be platformized, so that the large-capacity wide-band battery pack can be compatible with the ultra-large-capacity wide-band battery pack, reducing the development cost and the tooling cost such as molds, fixtures, and inspection tools, as well as the manufacturing cost, while improving production efficiency.

[0017] In some embodiments, a portion of the battery cells are arranged along the third direction to form a first battery group, another portion of the battery cells are arranged along the third direction to form a second battery group, and the first battery group and the second battery group are arranged side by side along the first direction.

[0018] The electric vehicle according to the embodiment of the third aspect of the utility model includes the battery pack according to the embodiment of the second aspect of the utility model, which can reduce the development cost and production cost of the electric vehicle, and the recycling of battery cells improves the environmental benefits of the electric vehicle.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a schematic structural diagram of a battery cell according to an embodiment of the utility model at a viewing angle;

[0022] Figure 2 It is a schematic diagram of the structure of a battery cell (without a top patch) with two rivet-fixed poles at one viewing angle;

[0023] Figure 3 It is a schematic diagram of the structure of a battery cell with two rivet-fixed poles (without a top patch) from another perspective;

[0024] Figure 4 It is a schematic diagram of the structure of a battery cell (with a top patch) having two rivet-fixed poles at one viewing angle;

[0025] Figure 5 It is a schematic diagram of the structure of a battery cell (with a top patch) having two rivet-fixed poles from another perspective;

[0026] Figure 6 It is a schematic diagram of the structure of a battery cell with a rivet-fixed pole (without a top patch) at one viewing angle;

[0027] Figure 7 It is a schematic diagram of the structure of a battery cell with a rivet-fixed pole (without a top patch) from another perspective;

[0028] Figure 8 It is a schematic diagram of the structure of a battery cell (with a top patch) having a rivet-fixed pole at one viewing angle;

[0029] Fig. 9 It is a schematic diagram of the structure of a battery cell (with a top patch) having a rivet-fixed pole at one viewing angle;

[0030] Fig.10 is a schematic structural diagram of a battery pack according to an embodiment of the utility model;

[0031] Fig.11 It is a structural schematic diagram of an electric vehicle according to an embodiment of the utility model.

[0032] Reference numerals:

[0033] Electric Vehicles 1000;

[0034] Battery pack 1100;

[0035] Battery pack housing 110, first battery group 120, second battery group 130;

[0036] Battery cell 100, first end surface 1011, second end surface 1012, third side surface 1013;

[0037] A first top cover 1, a positive pole 11, a first top patch 12, a first collection window 121, an explosion-proof valve 13, and an explosion-proof valve protective film 131;

[0038] A second top cover 2, a negative electrode column 21, a second top patch 22, a second collection window 221, and a liquid injection port 24;

[0039] Fastener 4. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Reference below Figure 1-Figure 11 A battery cell 100 according to an embodiment of the present invention is described.

[0044] like Figure 1As shown, according to the battery cell 100 of the embodiment of the utility model, the battery cell 100 is a rectangular structure, and the size of the battery cell 100 along the first direction is 560mm-600mm, the size of the battery cell 100 along the second direction is 100mm-140mm, and the size of the battery cell 100 along the third direction is 12mm-22mm. The battery cell 100 is provided with a positive electrode column 11 at one end in the first direction and a negative electrode column 21 at the other end, and the first direction, the second direction and the third direction are perpendicular to each other.

[0045] Optionally, the size of the battery cell 100 along the first direction can be 560mm, 562mm, 565mm, 570mm, 575mm, 576mm, 580mm, 586mm, 594mm, 600mm, etc. Of course, the size of the battery cell 100 along the first direction can also be other values ​​between 12mm-22mm, which are not listed here one by one.

[0046] Optionally, the size of the battery cell 100 along the second direction may be 100mm, 114mm, 120mm, 127mm, 130mm, 133mm, 134mm, 140mm, etc. Of course, the size of the battery cell 100 along the third direction may also be other values ​​between 100mm-140mm, which are not listed here one by one.

[0047] Optionally, the size of the battery cell 100 along the third direction may be 12mm, 14mm, 15.5mm, 16mm, 18mm, 18.2mm, 20mm, 22mm, etc. Of course, the size of the battery cell 100 along the third direction may also be other values ​​between 560mm-600mm, which are not listed here one by one.

[0048] In the related art, there are many sizes, capacities, and types of battery cells 100, and the interchangeability of power battery products is poor. At present, there is a standardization of the size of cylindrical battery cells on the market. Cylindrical battery cells need to be formed into battery modules first, and then into battery packs to match the configuration requirements of different power levels of BEV models. Different from the related art, the present application designs the battery cell 100 as a rectangular structure. On the one hand, the rectangular battery cell 100 can serve as a beam in the battery pack, which can simplify the internal structure of the battery pack and improve the utilization of the space in the battery pack. On the other hand, the battery cell 100 of the present application is different from the standardized size of the rectangular battery cells on the market.

[0049] According to the battery cell 100 of the embodiment of the utility model, the battery cell 100 is a rectangular parallelepiped structure, and the battery cell 100 can be arranged compactly, reducing the space occupied when multiple battery cells 100 are arranged, and improving the utilization rate of the space in the battery pack. The shape of the battery cell 100 is consistent, and the size of the battery cell 100 along the first direction, the size along the second direction, and the size along the third direction can be changed. By changing the size of the battery cell 100, the capacity of the battery cell 100 can be changed to meet the use requirements of different electric vehicles 1000, which can reduce the research and development cost of the battery cell 100 and improve the versatility of the battery cell 100.

[0050] like Figure 1-Figure 3 As shown, specifically, the battery cell 100 has a length direction along the first direction, a height direction along the second direction, and a thickness direction along the third direction. The battery cell 100 is a rectangular parallelepiped, and the two side surfaces of the battery cell 100 along the first direction are respectively a first end surface 1011 and a second end surface 1012, and the two side surfaces of the battery cell 100 along the third direction are a third side surface 1013, wherein the third side surface 1013 is much larger than the first end surface 1011 and the second end surface 10122, so that the battery cell 100 has a flat appearance, can be stacked along the third direction and saves space. The positive electrode column 11 is located at the first end surface 1011, and the negative electrode column 21 is located at the second end surface 1012.

[0051] In some embodiments, when grabbing the battery cell 100 on the production line, the first end face 1011 or the second end face 1012 bears a force of at least 300N; the battery cell 100 also includes two side faces along the second direction, and when grabbing the battery cell 100 on the production line, the two side faces in the second direction bear a force of at least 500N.

[0052] like Figure 2-Figure 9 As shown, for example, the positive electrode column 11 and the negative electrode column 21 are fixed to the two ends of the battery cell 100 along the first direction by fasteners 4, respectively, and the fasteners 4 here may include at least one rivet. It is understandable that a plurality of rivets may be provided according to the size of the positive electrode column 11 and the negative electrode column 21 to improve the stability and reliability of the connection.

[0053] Alternatively, if Figure 6-Figure 9 As shown, the positive electrode column 11 and the negative electrode column 21 are fastened to the two sides of the battery cell 100 by a rivet respectively. Figure 2-Figure 5 As shown, the positive electrode column 11 and the negative electrode column 21 are fixed to two sides of the battery cell 100 by two rivets respectively. In some embodiments not shown in the figure, the number of rivets required for each electrode column can also be three, four or more.

[0054] In some examples, the positive electrode column 11 and the negative electrode column 21 can be connected to the battery cell 100 by welding, and the positive electrode column 11 and the negative electrode column 21 are both close to one side in the second direction, for example, the positive electrode column 11 and the negative electrode column 21 are both close to the top of the battery cell 100, which facilitates the connection operation of the positive electrode column 11 and the negative electrode column 21. During welding, the vertical bearing force of the electrode column surface is not less than 800N.

[0055] like Figure 4-Figure 5 , Figure 8-Figure 9 As shown, in some embodiments, the battery cell 100 includes a cell housing, a first top cover 1, a second top cover 2, a first top patch 12, and a second top patch 22. In the first direction, the first top cover 1 is located at one end of the cell housing, the second top cover 2 is located at the other end of the cell housing, and the first top cover 1 and the second top cover 2 are arranged opposite to each other, the second top patch 22 is attached to the second top cover 2, the positive electrode column 11 is arranged on the first top cover 1 and protrudes from the first top patch 12, and the negative electrode column 21 is arranged on the second top cover 2 and protrudes from the second top patch 22. In other words, the two ends of the cell housing along the first direction include a first end face 1011 and a second end face 1012, the first top cover 1 is arranged on the first end face 1011, the second top cover 2 is arranged on the second end face 1012, the positive electrode column 11 is arranged on the first top cover 1, the negative electrode column 21 is arranged on the second top cover 2, and the first top patch 12 is attached to the first top cover 1, and the second top patch 22 is attached to the second top cover 2. That is, the positive pole 11 is arranged on the first end face 1011 through the first top cover 1, and the negative pole 21 is arranged on the second end face 1012 through the second top cover 2. The first top cover 1 and the second top cover 2 provide pole installation space, making it easier to install and set the positive pole 11 and the negative pole 21. By setting the first top patch 12 and the second top patch 22, on the one hand, the end of the battery cell 100 is protected and plays a protective role; on the other hand, the end of the battery cell 100 is beautified; on the other hand, it can play an insulating role to prevent the end of the battery cell 100 from being short-circuited with the external circuit, thereby effectively ensuring the safety performance and quality of the battery cell 100.

[0056] Specifically, the first top patch 12 and the second top patch 22 may completely cover the first top cover 1 and the second top cover 2 of the battery cell 100. The thickness of the first top patch 12 and the second top patch 22 is 0.3 mm.

[0057] In some embodiments, the cell shell of the battery cell 100 is an aluminum shell, and the surface of the aluminum shell is clean, smooth and flat, but the aluminum shell should not be regarded as a limitation on the material of the cell shell, and the cell shell can also be made of other materials.

[0058] In some embodiments, in the first direction, the size of the positive electrode column 11 protruding from the first top patch 12 is 2.8mm-3.0mm, the size of the negative electrode column 21 protruding from the second top patch 22 is 2.8mm-3.0mm, and the thickness of the first top patch 12 and the second top patch 22 is 0.3mm. By protruding the positive electrode column 11 and the negative electrode column 21, it is convenient to electrically connect the positive electrode column 11 and the negative electrode column 21 of multiple battery cells 100, thereby improving the convenience of connecting the battery cells 100. Optionally, the size of the positive electrode column 11 protruding from the first top patch 12 is 2.9mm, 2.92mm, etc., and the size of the negative electrode column 21 protruding from the second top patch 22 is 2.9mm, 2.92mm, etc.

[0059] like Figure 2-Figure 9 As shown, in some embodiments, the battery cell 100 further includes an explosion-proof valve 13. The explosion-proof valve 13 is arranged on the first top cover 1, and an explosion-proof valve protective film 131 is arranged on the first top cover 1. The explosion-proof valve protective film 131 is directly opposite to the explosion-proof valve 13, and the explosion-proof valve protective film 131 can be attached to the explosion-proof valve 13. A liquid injection port 24 is provided on the second top cover 2, and a second top patch 22 is covered on the liquid injection port 24. Specifically, the explosion-proof valve 13 and the positive electrode column 11 are arranged on the first top cover 1 of the first end face 1011, and both can be exposed from the first top patch 12; the negative electrode column 21 and the liquid injection port 24 are arranged on the second top cover 2 of the second end face 1012, and the negative electrode column 21 can be exposed from the second top patch 22. The size of the first top cover 1 and the second top cover 2 is small, and by arranging the explosion-proof valve 13 and the liquid injection port 24 on different sides of the battery cell 100, the layout can be made more reasonable.

[0060] In some examples, the explosion-proof valve protection film 131 is a blue transparent film.

[0061] like Figure 1 , Figure 3-Figure 4 , Figure 8-Figure 9 As shown, in some embodiments, a first collection window 121 may be provided on the first top patch 12, and the first collection window 121 penetrates the first top patch 12 along the thickness direction of the first top patch 12; of course, a second collection window 221 may be provided on the second top patch 22, and the second collection window 221 penetrates the second top patch 22 along the thickness direction of the second top patch 22. By providing the first collection window 121 and the second collection window 221, it is convenient to collect the status information of the battery cell 100.

[0062] Optionally, a temperature sensor may be provided at least one of the first collection window 121 and the second collection window 221 to detect the temperature of the battery cell 100 in real time.

[0063] Optionally, a two-dimensional code of information such as the model and capacity of the battery cell 100 may be set in at least one of the first collection window 121 and the second collection window 221 .

[0064] Optionally, when the battery cells 100 are stacked and arranged, the first top patch 12 is blocked by other battery cells 100 . By providing the second collection window 221 , the convenience of collecting information of the battery cells 100 can be improved.

[0065] like Figure 5 and Figure 8 As shown, in some embodiments, the first top patch 12 is provided with a first through hole to expose the positive electrode column 11, and a second through hole to expose the explosion-proof valve 13. The first top patch 12 is provided with a first collection window 121 that penetrates along the thickness direction of the first top patch 12, and the first collection window 121 is located between the first through hole and the second through hole; Figure 4 and Fig. 9 As shown, a third perforation is provided on the second top patch 22 to expose the negative electrode column 21 , a second collection window 221 is opened on the second top patch 22 , and the second collection window 221 penetrates the second top patch 22 along the thickness direction of the second top patch 22 , and the third perforation is separated from the second collection window 221 .

[0066] By arranging the first perforation, the first collection window 121 and the second perforation at intervals on the first top patch 12 and opening the third perforation and the second collection window 221 on the second top patch 22 , the arrangement of the battery cells 100 can be made more reasonable.

[0067] In some embodiments, the battery cell 100 further includes an insulating film, which is coated on the outside of the cell shell. By providing the insulating film, the battery cell 100 can be protected, the failure and loss caused by battery leakage can be reduced, and the short circuit between two adjacent battery cells 100 can be prevented. Specifically, the insulating film and the first top patch 12 and the second top patch 22 are well attached, without warping or wrinkles, and the surface is clean and free of dirt.

[0068] like Fig.10 As shown, the battery pack 1100 according to the embodiment of the utility model includes a battery pack housing 110 and a battery pack, and the battery pack is located in the battery pack housing 110. The battery pack includes a battery cell 100, and the battery cell 100 may include a plurality of battery cells. The sizes of the plurality of battery cells 100 along the third direction may be equal or the sizes of at least two battery cells 100 along the third direction may be unequal, and at least a portion of the battery cells 100 are arranged along the third direction to form a first battery pack 120.

[0069] When the dimensions of the plurality of battery cells 100 along the third direction are equal, the dimensions of the battery cells 100 are equal and the interchangeability is good.

[0070] When the dimensions of at least two battery cells 100 along the third direction are different, different battery capacity requirements can be met. For example, the thickness of some battery cells 100 in the battery pack is 15 mm, the thickness of some battery cells 100 is 18 mm, and the thickness of some battery cells 100 is 20 mm.

[0071] According to the battery pack 1100 of the embodiment of the utility model, by using the above-mentioned battery cells 100, when the battery cells 100 are arranged along the third direction into the first battery group 120, the battery cells 100 can be arranged more compactly, reducing the volume of the first battery group 120, thereby reducing the volume of the battery pack 1100. In addition, the positive electrode column 11 and the negative electrode column 21 are arranged at both ends in the first direction, and the positive electrode column 11 and the negative electrode column 21 can be exposed for series connection or parallel connection, simplifying the electrical layout inside the battery pack 1100. Since the battery cells 100 have the same size and shape along the first direction and the second direction, the size of the battery cells 100 is platformized and standardized. The capacity of the battery cells 100 can be changed by changing the size of the battery cells 100 along the third direction, thereby improving the interchangeability of the battery cells 100, facilitating the recycling and utilization of the battery cells 100, and improving the sustainability of the battery cells 100. When designing the battery pack 1100, the thickness of the battery cells 100 and the length of the battery pack 1100 along the third direction can be changed to match the different power requirements of the battery pack 1100, and then the internal electrical components and structural components of the battery pack 1100 can also be platformized, so that the large-capacity and wide-band battery pack 1100 can be compatible with the ultra-capacity and wide-band battery pack 1100, reducing the development cost and the cost of tooling such as molds, fixtures, and inspection tools, as well as the manufacturing cost, while improving production efficiency.

[0072] like Fig.10 As shown, in some embodiments, a portion of the battery cells 100 are arranged along the third direction to form a first battery group 120, and another portion of the battery cells 100 are arranged along the third direction to form a second battery group 130, and the first battery group 120 and the second battery group 130 are arranged side by side along the first direction. By arranging the battery cells 100 along the third direction, the space occupied by the battery cells can be saved, and the utilization rate of the internal space of the battery pack 1100 can be improved.

[0073] like Fig.11 As shown, the electric vehicle 1000 according to the embodiment of the utility model includes the battery pack 1100 according to the embodiment of the utility model, which can reduce the development cost and production cost of the electric vehicle 1000, and the recycling of the battery monomer 100 improves the environmental benefits of the electric vehicle 1000.

[0074] Other structures and operations of the electric vehicle 1000 according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0075] In the description of the present invention, "first" and "second" may include one or more of these features. Among them, the up-down direction, left-right direction and front-back direction are based on the up-down direction, left-right direction and front-back direction shown in the figure.

[0076] In the description of the present utility model, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature "above", "above" and "above" a second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0078] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cell, characterized in that: The battery cell is a rectangular structure, and the size of the battery cell along the first direction is 560mm-600mm, the size of the battery cell along the second direction is 100mm-140mm, and the size of the battery cell along the third direction is 12mm-22mm. The battery cell is provided with a positive pole at one end in the first direction and a negative pole at the other end, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The battery cell according to claim 1, characterized in that: The battery cell includes a cell shell, a first top cover, a second top cover, a first top patch and a second top patch. In the first direction, the first top cover is located at one end of the cell shell, the first top patch is attached to the first top cover, the second top cover is located at the other end of the cell shell, and the first top cover is arranged opposite to the second top cover, the second top patch is attached to the second top cover, the positive electrode column is arranged on the first top cover and protrudes from the first top patch, and the negative electrode column is arranged on the second top cover and protrudes from the second top patch.

3. The battery cell according to claim 2, characterized in that: In the first direction, the positive electrode column protrudes from the first top patch by 2.8 mm-3.0 mm, and the negative electrode column protrudes from the second top patch by 2.8 mm-3.0 mm.

4. The battery cell according to claim 2, characterized in that: The battery cell also includes an explosion-proof valve, which is arranged on the first top cover. The first top cover is provided with an explosion-proof valve protection film attached to the explosion-proof valve. The second top cover is provided with a liquid injection port, and the second top patch cover is arranged on the liquid injection port.

5. The battery cell according to claim 2, characterized in that: The first top patch is provided with a first collection window which penetrates along the thickness direction of the first top patch; and / or the second top patch is provided with a second collection window which penetrates along the thickness direction of the second top patch.

6. The battery cell according to claim 4, characterized in that: The first top patch is provided with a first through hole to expose the positive electrode column, and a second through hole to expose the explosion-proof valve. The first top patch is provided with a first collection window that penetrates along the thickness direction of the first top patch, and the first collection window is located between the first through hole and the second through hole; the second top patch is provided with a third through hole to expose the negative electrode column, and the second top patch is provided with a second collection window that penetrates along the thickness direction of the second top patch, and the third through hole is separated from the second collection window.

7. The battery cell according to claim 2, characterized in that: The battery cell further includes an insulating film, and the insulating film is coated outside the cell shell.

8. A battery pack, characterized in that: include: Battery pack housing; A battery pack, wherein the battery pack is located in the battery pack shell, and the battery pack includes a plurality of battery cells according to any one of claims 1 to 7, wherein the plurality of battery cells have equal sizes along the first direction, the plurality of battery cells have equal sizes along the second direction, the plurality of battery cells have equal sizes along the third direction or at least two of the battery cells have unequal sizes along the third direction, and at least a portion of the battery cells are arranged along the third direction to form a first battery pack.

9. The battery pack according to claim 8, characterized in that: A portion of the battery cells are arranged along the third direction to form a first battery group, and another portion of the battery cells are arranged along the third direction to form a second battery group. The first battery group and the second battery group are arranged side by side along the first direction.

10. An electric vehicle, characterized in that: Comprising a battery pack according to claim 8 or 9.

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