Single battery, battery module, energy storage device and vehicle

Abstract

The embodiment of the utility model provides a single battery, a battery module, an energy storage device and a vehicle, the single battery comprises a battery body, and the battery body comprises a first end part and a second end part which are opposite to each other along a second direction; wherein the first end part and / or the second end part are / is provided with a first pole and a second pole which are opposite in polarity; and at least one of the center of the first pole and the center of the second pole is not positioned on the center line of the battery body along a first direction intersected with the second direction. And the cost of the battery module can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a single battery cell, a battery module, an energy storage device, and a vehicle. Background Technology

[0002] Currently, batteries with large capacity and large size are gradually becoming the development trend. However, as the battery size increases, the number of individual cells increases, and the amount of connectors used to connect the individual cells also increases, resulting in higher battery assembly costs. Utility Model Content

[0003] In view of the above problems, the present invention provides a single battery, battery module, energy storage device and vehicle that overcomes or at least partially solves the above problems.

[0004] To address the aforementioned problems, in a first aspect, this utility model discloses a single-cell battery, comprising: a battery body, the battery body including a first end and a second end opposite to each other along a second direction; wherein...

[0005] The first end and / or the second end are provided with a first pole post and a second pole post with opposite polarities;

[0006] Along a first direction intersecting the second direction, at least one of the centers of the first electrode post and the second electrode post is not located on the center line of the battery body.

[0007] Optionally, on the first end or the second end, the first pole post and the second pole post are spaced apart along the first direction and / or a third direction, and the third direction intersects the plane containing the first direction and the second direction.

[0008] Optionally, along the first direction, the battery body has a first side and a second side located on both sides of its centerline;

[0009] On either the first or the second end, the center of the first pole post is located on the first side, and the center of the second pole post is located on the second side.

[0010] Optionally, both the first end and the second end are provided with the first pole post and the second pole post.

[0011] Optionally, the first pole post on the first end and the first pole post on the second end are arranged opposite to each other along the second direction;

[0012] And / or, the second pole on the first end and the second pole on the second end are arranged opposite each other along the second direction.

[0013] Optionally, the first pole post on the first end and the second pole post on the second end are arranged opposite to each other along the second direction;

[0014] And / or, the second pole on the first end and the first pole on the second end are arranged opposite each other along the second direction.

[0015] Optionally, at the first end or the second end, the distance between the center of the first pole post and the center of the second pole post in the first direction is U, 0. <U≤50mm。

[0016] Optionally, along the first direction, the minimum distance between the edge of the first electrode post and the edge of the battery body is X1, where X1 ≥ 3 mm;

[0017] And / or, along the first direction, the minimum distance between the edge of the second electrode post and the edge of the battery body is X2, where X2 ≥ 3 mm.

[0018] Optionally, the length of the battery body in the second direction is L, where 600mm ≤ L ≤ 2500mm.

[0019] Optionally, the battery body includes a housing and a battery cell disposed within the housing. The battery cell includes a third end and a fourth end opposite to each other along the second direction. The third end corresponds to the first end, and the fourth end corresponds to the second end.

[0020] The third end and / or the fourth end are provided with a first electrode and a second electrode with opposite polarities. The first electrode on the third end is electrically connected to the first post on the first end, and the second electrode on the third end is electrically connected to the second post on the first end. The first electrode on the fourth end is electrically connected to the first post on the second end, and the second electrode on the fourth end is electrically connected to the second post on the second end.

[0021] Optionally, the first and second tabs on the third end are bent in opposite directions;

[0022] And / or, the bending directions of the first and second tabs on the fourth end are opposite.

[0023] Optionally, the first electrode and the second electrode on the third end are spaced apart;

[0024] And / or, the first and second electrodes on the fourth end are spaced apart.

[0025] Optionally, the thickness of the battery body in the first direction is H, the length of the battery body in the second direction is L, and the width of the battery body in the third direction is W, where L > W > H;

[0026] The third direction intersects the plane containing the first direction and the second direction.

[0027] Secondly, this utility model discloses a battery module comprising multiple individual batteries as described above.

[0028] Optionally, the battery module further includes multiple electrical connectors; the multiple individual cells are stacked along a first direction;

[0029] The two adjacent individual cells are respectively the first individual cell and the second individual cell;

[0030] The electrical connector is electrically connected to the first terminal of the first single cell and the first terminal of the second single cell, or the electrical connector is electrically connected to the first terminal of the first single cell and the second terminal of the second single cell.

[0031] Thirdly, this utility model discloses an energy storage device, including the aforementioned single battery cell or the aforementioned battery module.

[0032] Fourthly, this utility model discloses a vehicle that includes the aforementioned battery module or the aforementioned energy storage device.

[0033] The embodiments of this utility model have the following advantages:

[0034] In this embodiment of the present invention, along the first direction, at least one of the centers of the first electrode post and the second electrode post is not located on the center line of the battery body, so that at least one of the first electrode post and the second electrode post can be close to the edge of the battery body in the first direction. In this way, when the two individual batteries are connected by electrical connectors, it is easy to shorten the length of the electrical connectors, thereby reducing the assembly cost of the battery module. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a single battery according to the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of a single battery cell at the first end of this utility model;

[0037] Figure 3 This is a schematic diagram of the structure of a single battery cell at the second end of the present invention;

[0038] Figure 4This is a diagram showing the electrode arrangement at the first and second ends of a single-cell battery according to this utility model;

[0039] Figure 5 This is a diagram showing the electrode arrangement of the first and second ends of another single-cell battery according to this utility model.

[0040] Figure 6 This is a schematic diagram of the structure of another single cell battery of this utility model at the first end;

[0041] Figure 7 This is a schematic diagram of the assembly structure of a battery cell according to this utility model;

[0042] Figure 8 This is a structural schematic diagram of a battery module according to the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Battery body; 11. First end; 12. Second end; 13. Cell; 131. First tab; 132. Second tab; 133. Third end; 134. Fourth end; 2. First terminal; 3. Second terminal; 4. Electrical connector. Detailed Implementation

[0045] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0047] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] In a first aspect, one of the core concepts of this utility model is to disclose a single battery, including: a battery body 1, the battery body 1 including a first end 11 and a second end 12 opposite to each other along a second direction S2; wherein, the first end 11 and / or the second end 12 are provided with a first electrode post 2 and a second electrode post 3 with opposite polarities; along a first direction S1 intersecting the second direction S2, at least one of the center of the first electrode post 2 and the center of the second electrode post 3 is not located on the center line of the battery body 1.

[0050] In this embodiment of the present invention, along the first direction S1, at least one of the centers of the first electrode post 2 and the second electrode post 3 is not located on the center line of the battery body 1, so that at least one of the first electrode post 2 and the second electrode post 3 is close to the edge of the battery body 1 in the first direction S1. In this way, when the two individual batteries are connected by the electrical connector 4, it is easy to shorten the length of the electrical connector 4 and reduce the cost of the battery module.

[0051] In this embodiment of the invention, the single battery cell has a first direction S1, a second direction S2, and a third direction S3 that intersect each other in pairs. The third direction S3 intersects the plane containing the first direction S1 and the second direction S2, as shown below. Figure 1 and Figure 2 As shown, the first direction S1 is the thickness direction of the single cell, the second direction S2 is the length direction of the single cell, and the third direction S3 is the width direction of the single cell.

[0052] Specifically, the battery body 1 is the main part of the single battery cell and is used to provide electrical energy. The battery body 1 may include a first end 11 and a second end 12 opposite to each other along the second direction S2. In some embodiments, a first terminal 2 and a second terminal 3 with opposite polarities may be arranged at the first end 11. The first terminal 2 and the second terminal 3 can be electrically connected to an electrical device, that is, the single battery cell is electrically connected to the electrical device through the first terminal 2 and the second terminal 3 to supply power to the electrical device.

[0053] Optionally, the thickness of the battery body 1 in the first direction S1 is H, the length of the battery body 1 in the second direction S2 is L, and the width of the battery body 1 in the third direction S3 is W, where L > W > H. This allows the first electrode post 2 and the second electrode post 3 to be set off from the centerline of the battery body 1 in the thickness direction of the single cell, which is beneficial to shortening the arrangement length of the electrical connector 4.

[0054] Specifically, the first terminal 2 and the second terminal 3 are spaced apart to avoid short circuits.

[0055] Specifically, one of the first terminal 2 and the second terminal 3 can be a positive terminal, and the other can be a negative terminal. The first terminal 2 and the second terminal 3, together with the battery body 1, can form a power supply circuit at the first end 11. Thus, even if the battery body 1 is relatively long, a short electron path can still be ensured, resulting in low impedance of the individual battery cell. In this embodiment of the invention, both a large capacity and low impedance of the individual battery cell can be simultaneously guaranteed.

[0056] In other embodiments, a first terminal 2 and a second terminal 3 with opposite polarities can be arranged at the second end 12, and the first terminal 2 and the second terminal 3 can cooperate with the battery body 1 to form a power supply circuit at the second end 12.

[0057] In some other embodiments, while a first pole 2 and a second pole 3 with opposite polarities are arranged at the first end 11, a first pole 2 and a second pole 3 with opposite polarities are arranged at the second end 12, so as to form two power supply circuits at the first end 11 and the second end 12 respectively.

[0058] In other embodiments, one of the first pole post 2 and the second pole post 3 may be arranged at the first end 11, and the other of the first pole post 2 and the second pole post 3 may be arranged at the second end 12.

[0059] Specifically, multiple individual battery cells can be connected in series or in parallel through electrical connectors 4 to assemble a battery module. Since at least one of the centers of the first terminal 2 and the second terminal 3 is not located on the center line of the battery body 1 along the first direction S1, at least one of the first terminal 2 and the second terminal 3 is close to the edge of the battery body 1 in the first direction S1. In this way, when using electrical connectors 4 to connect two individual battery cells, the length of electrical connectors 4 can be shortened to reduce costs.

[0060] Furthermore, the length of the electrical connector 4 is shortened, and the straight-line distance between two adjacent electrical connectors 4 is increased to form an air passage, which facilitates better dissipation of the heat generated by the battery module during operation.

[0061] Specifically, the center of the first electrode post 2 and the center of the second electrode post 3 can be located on the same side or different sides of the center line of the battery body 1.

[0062] In some alternative embodiments, on the first end 11 or the second end 12, the first electrode post 2 and the second electrode post 3 are spaced apart along the first direction S1 and / or the third direction S3 of the battery body 1.

[0063] In this embodiment of the utility model, the first pole 2 and the second pole 3 are spaced apart along the first direction S1. Alternatively, the first pole 2 and the second pole 3 can also be spaced apart along the third direction S3. Or, the first pole 2 and the second pole 3 can also be spaced apart along the first direction S1 and the third direction S3, which can prevent the first pole 2 and the second pole 3 from short-circuiting.

[0064] Specifically, the first electrode 2 and the second electrode 3 are spaced apart along the first direction S1 and the third direction S3, so that the first direction S1 and the third direction S3 are not on the same straight line. This staggered design makes it easier to shorten the thickness of the battery body 1, thereby shortening the current conduction path, reducing the internal resistance of the individual battery cells, and improving the overcurrent capacity of the individual battery cells.

[0065] Specifically, on the first end 11, the first pole post 2 and the second pole post 3 are arranged at intervals along the first direction S1 and the third direction S3, so that the first pole post 2 and the second pole post 3 on the first end 11 are asymmetrically distributed along the first direction S1.

[0066] Specifically, on the second end 12, the first pole post 2 and the second pole post 3 are arranged at intervals along the first direction S1 and the third direction S3, so that the first pole post 2 and the second pole post 3 on the second end 12 are asymmetrically distributed along the first direction S1.

[0067] In some alternative embodiments, the first electrode post 2 and the second electrode post 3 on the first end 11 or the second end 12 may also be arranged opposite to each other and spaced apart along the first direction S1, which requires that the battery body 1 be relatively thick.

[0068] In some alternative embodiments, the battery body 1 includes a housing and a battery cell 13 disposed within the housing. For example, Figure 7 As shown, the battery cell 13 includes a third end 133 and a fourth end 134 opposite to each other along the second direction. The third end 133 corresponds to the first end 11, and the fourth end 134 corresponds to the second end 12. The third end 133 and / or the fourth end 134 are provided with a first tab 131 and a second tab 132 of opposite polarity. The first tab 131 on the third end 133 is electrically connected to the first terminal 2 on the first end 11, which facilitates improving the reliability of the electrical connection between the first terminal 2 and the battery cell 13.

[0069] The second tab 132 on the third end 133 is electrically connected to the second pole post 3 on the first end 11, which facilitates the improvement of the reliability of the electrical connection between the second pole post 3 and the battery cell 13.

[0070] The first tab 131 on the fourth end 134 is electrically connected to the first pole post 2 on the second end 12, which facilitates the improvement of the reliability of the electrical connection between the first pole post 2 and the battery cell 13.

[0071] The second tab 132 on the fourth end 134 is electrically connected to the second pole post 3 on the second end 12, which facilitates the improvement of the reliability of the electrical connection between the second pole post 3 and the battery cell 13.

[0072] Optionally, the first tab 131 and the second tab 132 on the third end 133 are bent in opposite directions, which can prevent interference between the first tab 131 and the second tab 132 on the third end 133.

[0073] Optionally, the first tab 131 and the second tab 132 on the fourth end 134 are bent in opposite directions to avoid interference between the first tab 131 and the second tab 132.

[0074] Specifically, the first tab 131 and the second tab 132 on the third end 133 are bent in opposite directions, and / or the first tab 131 and the second tab 132 on the fourth end 134 are bent in opposite directions.

[0075] Specifically, the first tab 131 and the first terminal 2 are correspondingly provided and electrically connected, and the first tab 131 is used to connect the first terminal 2 and the battery cell 13. The second tab 132 and the second terminal 3 are correspondingly provided and electrically connected, and the second tab 132 is used to connect the second terminal 3 and the battery cell 13.

[0076] Specifically, the first pole post 2 passes through the housing, with part of it exposed outside the housing for electrical connection to the electrical component, and part of it located inside the housing for electrical connection to the first electrode tab 131. The first pole post 2 and the housing can be sealed together by a sealing structure such as a sealing ring or a sealing gasket. The material of this sealing structure can be plastic or rubber, and the sealing structure can be spliced ​​and fixed to the first pole post 2 or integrally formed.

[0077] Specifically, the second pole 3 passes through the housing, with part of it exposed outside the housing for electrical connection to the electrical component, and part of it located inside the housing for electrical connection to the second pole lug 132. The second pole 3 and the housing can be sealed together by a sealing structure such as a sealing ring or a sealing gasket. The material of this sealing structure can be plastic or rubber, and the sealing structure can be spliced ​​and fixed to the second pole 3 or integrally formed.

[0078] Specifically, taking the outer casing including a top cover, a bottom cover, and a sleeve as an example, the top cover and the bottom cover are designed asymmetrically along the length of the battery body 1.

[0079] Specifically, both the first tab 131 and the second tab 132 can be connected to the middle position of the battery cell 13 in the first direction S1, and the lengths of the first tab 131 and the second tab 132 can be the same or different.

[0080] Optionally, the first tab 131 and the second tab 132 on the third end portion 133 are arranged at intervals to avoid short circuit.

[0081] Specifically, the first tab 131 and the second tab 132 on the third end portion 133 can be arranged at intervals in the first direction S1 and at intervals in the width direction of the battery body 1.

[0082] Optionally, the first tab 131 and the second tab 132 on the fourth end portion 134 are arranged at intervals to avoid short circuit.

[0083] Specifically, the first tab 131 and the second tab 132 on the fourth end portion 134 can be arranged at intervals in the first direction S1 and / or the third direction S3 and at intervals in the width direction of the battery body 1.

[0084] In some optional embodiments, on the first end portion or the second end portion, the distance between the centers of the first pole 2 and the second pole 3 in the first direction S1 is U, and 0 < U ≤ 50 mm.

[0085] In the embodiment of the present utility model, 0 < U ≤ 50 mm. In this way, the lengths of the first tab 131 and the second tab 132 are arranged to be shorter, which is convenient for welding the first tab 131 to the first pole 2 or welding the second tab 132 to the second pole 3, and is also convenient for bundling the first tab 131 and the second tab 132.

[0086] Specifically, when U > 50 mm, in order to weld close to the first pole 2 or the second pole 3, the first tab 131 and the second tab 132 will be set longer, resulting in difficulty in bundling the first tab 131 and the second tab 132.

[0087] Specifically, the housing is usually of a spliced structure. For example, the housing can include a top cover and a cylinder, and the top cover is welded to the top of the cylinder, or the housing can include a top cover, a bottom cover and a sleeve, and the top cover and the bottom cover are respectively welded to both ends of the sleeve.

[0088] Optionally, as Figure 6 shown, along the first direction S1, the minimum distance between the edge of the first pole 2 and the edge of the battery body 1 is X1, and X1 ≥ 3 mm.

[0089] In this embodiment of the utility model, X1≥3mm can avoid the high temperature generated by the high-energy laser beam during shell welding, which would cause deformation of the sealing structure between the first pole post 2 and the shell, thereby avoiding safety risks such as leakage.

[0090] Specifically, when X1 < 3mm, the distance between the edge of the first electrode post 2 and the edge of the battery body 1 is small. When the casing is welded together, the high temperature generated by the high-energy laser beam can easily cause deformation of the sealing structure between the first electrode post 2 and the casing, which can easily lead to safety risks such as leakage.

[0091] Optionally, such as Figure 6 As shown, along the first direction S1, the minimum distance between the edge of the second pole post 3 and the edge of the battery body 1 is X2, where X2 ≥ 3 mm.

[0092] In this embodiment of the utility model, X2≥3mm can avoid the high temperature generated by the high-energy laser beam during shell welding, which would cause deformation of the sealing structure between the second pole post 3 and the shell, thereby avoiding safety risks such as leakage.

[0093] Specifically, when X2 < 3mm, the distance between the edge of the second electrode post 3 and the edge of the battery body 1 is small. When the casing is welded together, the high temperature generated by the high-energy laser beam can easily cause deformation of the sealing structure between the second electrode post 3 and the casing, which can easily lead to safety risks such as leakage.

[0094] In some alternative embodiments, such as Figures 1 to 3 As shown, the first end 11 and the second end 12 are both provided with a first pole post 2 and a second pole post 3.

[0095] In this embodiment of the invention, at the first end 11, the first terminal 2 is electrically connected to the cell 13 via the first tab 131, and the second terminal 3 is electrically connected to the cell 13 via the second tab 132, forming a power supply circuit. At the second end 12, the first terminal 2 is electrically connected to the cell 13 via the first tab 131, and the second terminal 3 is electrically connected to the cell 13 via the second tab 132, forming another power supply circuit. Thus, if one power supply circuit becomes disconnected, the other power supply circuit can serve as a backup, which is beneficial for subsequent repairs of the individual battery cells.

[0096] Specifically, power supply circuits are formed on the first end 11 and the second end 12 respectively, which can reduce the current path and reduce the impedance of the battery body 1.

[0097] For example, a first terminal A1 and a second terminal A2 are arranged on the first end 11, a first terminal B1 and a second terminal B2 are arranged on the second end 12, a first tab C1 and a second tab C2 are arranged on the third end 133 of the battery cell 13, and a first tab D1 and a second tab D2 are arranged on the fourth end 134 of the battery cell 13. The first terminal A1 is electrically connected to the battery cell 13 through the first tab C1, and the second terminal A2 is electrically connected to the battery cell 13 through the second tab C2, forming a first power supply circuit. The first terminal B1 is electrically connected to the battery cell 13 through the first tab D1, and the second terminal B2 is electrically connected to the battery cell 13 through the second tab D2, forming a second power supply circuit.

[0098] In the event that the first power supply circuit is disconnected due to damage to one of the first terminal A1, the first tab C1, the second terminal A2, or the second tab C2, the second power supply circuit can serve as a backup. Alternatively, in the event that the second power supply circuit is disconnected due to damage to one of the first terminal B1, the first tab D1, the second terminal B2, or the second tab D2, the first power supply circuit can serve as a backup.

[0099] Optionally, along the first direction S1, the battery body 1 has a first side and a second side located on both sides of its centerline; on the first end 11 or the second end 12, the center of the first terminal 2 is located on the first side, and the center of the second terminal 3 is located on the second side, as shown below. Figure 8 As shown, the same single cell can be electrically connected to two adjacent single cells through a shorter electrical connector 4, which can further reduce costs and at the same time reduce the current path and reduce the impedance of the battery body 1.

[0100] Optionally, such as Figure 4 As shown, the first electrode post 2 on the first end 11 and the first electrode post 2 on the second end 12 are arranged opposite to each other along the second direction S2, such that the first electrode posts 2 on the first end 11 and the second end 12 are off the same side of the center line of the battery body 1 in the first direction S1.

[0101] Optionally, the second electrode 3 on the first end 11 and the second electrode 3 on the second end 12 are arranged opposite each other along the second direction S2, such that the first electrode 2 on the first end 11 and the second end 12 are off the same side of the center line of the battery body 1 in the first direction S1.

[0102] Specifically, the first pole post 2 on the first end 11 and the first pole post 2 on the second end 12 are arranged opposite to each other along the second direction S2, and / or the second pole post 3 on the first end 11 and the second pole post 3 on the second end 12 are arranged opposite to each other along the second direction S2.

[0103] Optionally, the first electrode post 2 on the first end 11 and the first electrode post 2 on the second end 12 are arranged opposite to each other along the second direction S2, and the second electrode post 3 on the first end 11 and the second electrode post 3 on the second end 12 are arranged opposite to each other along the second direction S2. Since the second direction S2 intersects with the first direction S1, the structures of two adjacent single cells in the battery module can be consistent, which simplifies the manufacturing difficulty of the battery module.

[0104] Specifically, the first terminal 2 on the first end 11 and the second terminal 3 on the second end 12 are arranged diagonally on the battery body 1.

[0105] Specifically, the positions of two identical single-cell batteries can be changed so that the first terminal 2 of one single-cell battery is arranged close to the second terminal 3 of the other single-cell battery.

[0106] Optionally, such as Figure 5 As shown, the first electrode post 2 on the first end 11 and the second electrode post 3 on the second end 12 are arranged opposite to each other along the second direction S2, such that the first electrode post 2 on the first end 11 and the second electrode post 3 on the second end 12 are off the same side of the center line of the battery body 1 in the first direction S1.

[0107] Optionally, the second electrode post 3 on the first end 11 and the first electrode post 2 on the second end 12 are arranged opposite to each other along the second direction S2, such that the second electrode post 3 on the first end 11 and the first electrode post 2 on the second end 12 are off the same side of the center line of the battery body 1 in the first direction S1.

[0108] Specifically, the first pole post 2 on the first end 11 and the second pole post 3 on the second end 12 are arranged opposite to each other along the second direction S2; and / or, the second pole post 3 on the first end 11 and the first pole post 2 on the second end 12 are arranged opposite to each other along the second direction S2.

[0109] Optionally, the first electrode post 2 on the first end 11 and the second electrode post 3 on the second end 12 are arranged opposite to each other along the second direction S2. The second electrode post 3 on the first end 11 and the first electrode post 2 on the second end 12 are arranged opposite to each other along the second direction S2. This can change the position of two identical single cells, so that the first electrode post 2 of one single cell and the second electrode post 3 of another single cell are arranged close to each other. In this way, the structures of two adjacent single cells in the battery module can be consistent, which simplifies the manufacturing difficulty of the battery module.

[0110] Optionally, the length of the battery body 1 in the second direction S2 is L, where 600mm≤L≤2500mm.

[0111] In this embodiment of the utility model, 600mm≤L≤2500mm makes the battery body 1 longer, which facilitates increasing the capacity of a single battery cell.

[0112] The single-cell battery described in this embodiment of the present invention has at least the following advantages:

[0113] In this embodiment of the present invention, along the first direction S1, at least one of the center of the first electrode post 2 and the center of the second electrode post 3 is not located on the center line of the battery body 1, so that at least one of the first electrode post 2 and the second electrode post 3 is close to the edge of the battery body 1 in the first direction S1. In this way, when the two individual batteries are connected by the electrical connector 4, it is easy to shorten the length of the electrical connector 4, thereby reducing the cost of the battery module.

[0114] Secondly, this utility model also discloses a battery module, which includes multiple of the above-mentioned individual batteries.

[0115] In this embodiment of the utility model, the battery module includes multiple individual batteries, which can be stacked and arranged in a stacked manner. Two adjacent individual batteries can be connected in series or in parallel.

[0116] Optionally, the battery module further includes multiple electrical connectors 4; multiple individual cells are stacked along the first direction S1; wherein two adjacent individual cells are respectively a first individual cell and a second individual cell; the electrical connectors 4 are electrically connected to the first terminal 2 of the first individual cell and the first terminal 2 of the second individual cell to realize the parallel connection of the first individual cell and the second individual cell.

[0117] Specifically, the electrical connector 4 is electrically connected to the first terminal 2 of the first single cell on the first end 11 and the first terminal 2 of the second single cell on the second end 12.

[0118] Alternatively, the electrical connector 4 can be electrically connected to the first terminal 2 of the first single cell and the second terminal 3 of the second single cell to achieve a series connection between the first single cell and the second single cell.

[0119] Specifically, the structures of the first and second individual cells can be the same or different, and this embodiment of the present invention does not impose specific limitations on this.

[0120] Specifically, such as Figure 8As shown, in each individual battery cell, the first terminal 2 on the first end 11 and the first terminal 2 on the second end 12 are arranged opposite to each other along the second direction S2; the second terminal 3 on the first end 11 and the second terminal 3 on the second end 12 are arranged opposite to each other along the second direction. After the second individual battery cell is turned over and rotated, the second end 12 of the second individual battery cell is adjacent to the first end 11 of the first individual battery cell, and the electrical connector 4 is electrically connected to the first terminal 2 on the first end 11 of the first individual battery cell and the second terminal 3 on the second end 12 of the second individual battery cell.

[0121] In some embodiments, the structures of the first single cell and the second single cell may be different, and the electrical connector 4 may also be electrically connected to the first terminal 2 of the first single cell at the first end 11 and the second terminal 3 of the second single cell at the first end 11 to realize the series connection of the first single cell and the second single cell.

[0122] Specifically, each pair of adjacent individual cells can be connected by an electrical connector 4. The electrical connector 4 can be a conductive structure, such as a wire or a metal sheet.

[0123] The battery module described in this embodiment of the present invention has at least the following advantages:

[0124] In this embodiment of the present invention, along the first direction S1, at least one of the centers of the first electrode post and the second electrode post is not located on the center line of the battery body, such that at least one of the first electrode post and the second electrode post is close to the edge of the battery body in the first direction. In this way, when two individual batteries are connected by an electrical connector, it is easier to shorten the length of the electrical connector, thereby reducing the cost of the battery module.

[0125] Thirdly, this utility model also discloses an energy storage device, including the above-mentioned single battery or the above-mentioned battery module.

[0126] The energy storage device described in this embodiment of the present invention can achieve the same beneficial effects as the above-mentioned single battery or battery module, and will not be described again in this embodiment of the present invention.

[0127] Fourthly, this utility model also discloses a vehicle, including the above-mentioned battery module or the above-mentioned energy storage device.

[0128] The vehicle described in this embodiment of the present invention can achieve the same beneficial effects as the battery module or energy storage device described above, and will not be described again here.

[0129] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0130] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0131] The present invention provides a detailed description of a single battery, a battery module, an energy storage device, and a vehicle. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A single-cell battery, characterized in that, include: A battery body (1), the battery body (1) comprising a first end (11) and a second end (12) opposite each other along a second direction; wherein, The first end (11) and / or the second end (12) are provided with a first pole post (2) and a second pole post (3) of opposite polarity; Along a first direction intersecting the second direction, at least one of the centers of the first pole post (2) and the second pole post (3) is not located on the center line of the battery body (1).

2. The single-cell battery according to claim 1, characterized in that, On the first end (11) or the second end (12), the first pole post (2) and the second pole post (3) are spaced apart along the first direction and / or the third direction, and the third direction intersects the plane containing the first direction and the second direction.

3. The single-cell battery according to claim 1, characterized in that, Along the first direction, the battery body (1) has a first side and a second side located on both sides of its centerline; On the first end (11) or the second end (12), the center of the first pole post (2) is located on the first side, and the center of the second pole post (3) is located on the second side.

4. The single-cell battery according to claim 1, characterized in that, The first end (11) and the second end (12) are each provided with the first pole post (2) and the second pole post (3).

5. The single-cell battery according to any one of claims 2-4, characterized in that, The first pole post (2) on the first end (11) and the first pole post (2) on the second end (12) are arranged opposite to each other along the second direction; And / or, the second pole post (3) on the first end (11) and the second pole post (3) on the second end (12) are arranged opposite each other along the second direction.

6. The single-cell battery according to any one of claims 2-4, characterized in that, The first pole post (2) on the first end (11) and the second pole post (3) on the second end (12) are arranged opposite to each other along the second direction; And / or, the second pole post (3) on the first end (11) and the first pole post (2) on the second end (12) are arranged opposite each other along the second direction.

7. The single-cell battery according to any one of claims 1-6, characterized in that, On the first end (11) or the second end (12), the distance between the center of the first pole post (2) and the center of the second pole post (3) in the first direction is U, 0. <U≤50mm。 8. The single-cell battery according to any one of claims 1-7, characterized in that, Along the first direction, the minimum distance between the edge of the first pole post (2) and the edge of the battery body (1) is X1, where X1 ≥ 3 mm; And / or, along the first direction, the minimum distance between the edge of the second pole post (3) and the edge of the battery body (1) is X2, where X2 ≥ 3 mm.

9. The single-cell battery according to any one of claims 1-8, characterized in that, The length of the battery body (1) in the second direction is L, 600mm≤L≤2500mm.

10. The single-cell battery according to any one of claims 1-9, characterized in that, The battery body (1) includes a housing and a battery cell (13) disposed in the housing. The battery cell (13) includes a third end (133) and a fourth end (134) opposite to each other along the second direction. The third end (133) corresponds to the first end (11), and the fourth end (134) corresponds to the second end (12). The third end (133) and / or the fourth end (134) are provided with a first tab (131) and a second tab (132) of opposite polarity. The first tab (131) on the third end (133) is electrically connected to the first pole (2) on the first end (11). The second tab (132) on the third end (133) is electrically connected to the second pole (3) on the first end (11). The first tab (131) on the fourth end (134) is electrically connected to the first pole (2) on the second end (12). The second tab (132) on the fourth end (134) is electrically connected to the second pole (3) on the second end (12).

11. The single-cell battery according to claim 10, characterized in that, The first tab (131) and the second tab (132) on the third end (133) are bent in opposite directions; And / or, the bending directions of the first tab (131) and the second tab (132) on the fourth end (134) are opposite.

12. The single-cell battery according to claim 10, characterized in that, The first electrode tab (131) and the second electrode tab (132) on the third end (133) are arranged at intervals; And / or, the first tab (131) and the second tab (132) on the fourth end (134) are spaced apart.

13. The single-cell battery according to any one of claims 1-12, characterized in that, The thickness of the battery body (1) in the first direction is H, the length of the battery body (1) in the second direction is L, and the width of the battery body (1) in the third direction is W, where L > W > H; The third direction intersects the plane containing the first direction and the second direction.

14. A battery module, characterized in that, It includes the single-cell battery as described in any one of claims 1-13.

15. The battery module according to claim 14, characterized in that, The battery module also includes multiple electrical connectors (4); multiple individual batteries are stacked along a first direction; The two adjacent individual cells are respectively the first individual cell and the second individual cell; The electrical connector (4) is electrically connected to the first terminal (2) of the first single cell and the first terminal (2) of the second single cell, or the electrical connector (4) is electrically connected to the first terminal (2) of the first single cell and the second terminal (3) of the second single cell.

16. An energy storage device, characterized in that, Includes the single cell battery as described in any one of claims 1-13 or the battery module as described in any one of claims 14-15.

17. A vehicle, characterized in that, Includes the battery module as described in any one of claims 14-15 or the energy storage device as described in claim 16.

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