Single battery and battery pack

Abstract

The utility model relates to the technical field. Each single battery comprises a top surface, a bottom surface and two large surfaces, and the top surface is provided with a positive electrode connecting end and a negative electrode connecting end; the bottom surface and the top surface are oppositely arranged; the two large faces are oppositely arranged and located between the top face and the bottom face, and a certain included angle is formed between the two large faces. The phenomenon that a plurality of single batteries in the battery pack extrude one another is improved, and the safety of the battery pack is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a single cell and a battery pack. Background Art

[0002] A battery pack is provided with a plurality of single cells. When the single cells expand, the plurality of single cells in the battery pack are squeezed against each other, thereby reducing the safety of the battery pack. Summary of the invention

[0003] The embodiments of the present disclosure provide a single cell and a battery pack, which improve the mutual squeezing phenomenon of multiple single cells in the battery pack and improve the safety of the battery pack.

[0004] On the one hand, a single cell battery is provided, comprising a top surface, a bottom surface and two large surfaces, wherein the top surface is provided with a positive electrode connection terminal and a negative electrode connection terminal; the bottom surface is arranged opposite to the top surface; the two large surfaces are arranged opposite to each other and are both located between the top surface and the bottom surface, and a certain angle is formed between the two large surfaces.

[0005] In some embodiments, the angle between the large surface and the top surface is an acute angle.

[0006] In some embodiments, the area of ​​the top surface is greater than the area of ​​the bottom surface.

[0007] In some embodiments, the angle between the large surface and the top surface is an obtuse angle.

[0008] In some embodiments, the area of ​​the top surface is smaller than the area of ​​the bottom surface.

[0009] In some embodiments, the included angles between the two large surfaces and the top surface are the same.

[0010] On the other hand, a battery pack is provided, comprising a box body and a plurality of the single cells arranged in the box body.

[0011] In some embodiments, the plurality of single cells include a first single cell and a second single cell, the first single cell and the second single cell are arranged alternately, the angle between the large surface and the top surface of the first single cell is an obtuse angle, and the angle between the large surface and the top surface of the second single cell is an acute angle.

[0012] In some embodiments, a wedge-shaped space is formed between two adjacent first single cells, the second single cell is embedded in the wedge-shaped space, and the first single cell and the second single cell are matched in a wedge shape.

[0013] In the single cell and battery pack provided by the embodiments of the present disclosure, when a single cell expands, the single cell squeezes the single cell adjacent to it. For example, when two first single cells expand, the two first single cells squeeze the second single cell located between the two first single cells at the same time, so that the second single cell moves upward in the vertical direction, thereby reducing the mutual squeezing phenomenon of the single cells and improving the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 An exploded view of a battery pack provided in an embodiment of the present disclosure;

[0016] Figure 2 A front view of a single battery is provided for an embodiment of the present disclosure;

[0017] Figure 3 A front view of another single cell is provided for the embodiment of the present disclosure;

[0018] Figure 4 A diagram showing the arrangement relationship of single cells of a battery pack in a normal state provided by an embodiment of the present disclosure;

[0019] Figure 5 A diagram showing the arrangement of single cells of a battery pack in a squeezed state according to an embodiment of the present disclosure.

[0020] Reference numerals:

[0021] 100-thermal management components; 200-single battery; 300-interface;

[0022] 10-top surface; 20-bottom surface; 30-large surface;

[0023] 31-first large surface; 32-second large surface;

[0024] 11- positive electrode connection terminal; 12- negative electrode connection terminal;

[0025] 101 - a first single cell; 102 - a second single cell. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0027] In the embodiments of the present disclosure, words such as "first", "second", "third", and "fourth" are used to distinguish between identical or similar items with substantially the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present disclosure and shall not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0028] In the embodiments of the present disclosure, “plurality” means two or more than two, and “at least one” means one or more than one, unless otherwise clearly and specifically defined.

[0029] In the embodiments of the present disclosure, the orientation or positional relationship indicated by the terms "upper" and "lower" etc. is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present disclosure 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 disclosure.

[0030] The disclosed embodiment provides a battery pack, which can be a power battery pack, used in electric vehicles to provide power for the drive motor of the electric vehicle. Of course, the battery pack can also be other types of battery packs, such as battery packs used in electric bicycles and electric motorcycles. The embodiment of the application does not limit the type and application scenario of the battery pack.

[0031] Figure 1 This is an exploded view of a battery pack provided by an embodiment of the present disclosure. Figure 1 As shown, the battery pack includes a box body and a single battery 200 arranged in the box body. The box body is used to protect the single battery inside and prevent the single battery from being hit. A cavity may be provided in the box body, and the single battery 200 is installed in the cavity. Among them, the battery pack may include a plurality of single batteries 200, and the plurality of single batteries 200 are arranged in an array. When a plurality of single batteries 200 are arranged in the box body, the plurality of single batteries 200 may be connected in series or in parallel.

[0032] Continue to refer Figure 1 The battery pack may include a thermal management component 100 , which is connected to the single battery 200 to adjust the temperature of the single battery 200 .

[0033] For example, as above Figure 1As shown, a plurality of single cells 200 may be arranged in an array, and the plurality of single cells 200 arranged in an array form a plurality of single cell groups, each single cell group includes a plurality of single cells 200, and the plurality of single cells 200 are arranged along a first direction X to form a plurality of single cell groups, and the plurality of single cell groups are arranged at intervals along a second direction Y. The thermal management component 100 is located between two adjacent single cell groups, and the thermal management component 100 includes two opposite sides along the Y direction, one side of which is connected to the single cells 200 in one single cell group, and the other opposite side is connected to the single cells 200 in another single cell group.

[0034] Among them, the connection between the thermal management component 100 and the single cell 200 means that the heat generated by the single cell 200 can be transferred to the thermal management component 100 by heat transfer in any combination, which can be that the thermal management component 100 is in direct contact or physically connected to the single cell 200, or the thermal management component 100 is connected to the single cell 200 through other heat-conducting media to achieve heat transfer.

[0035] Exemplarily, the thermal management component 100 and the single cell 200 are bonded by a heat-conducting structural adhesive, so that heat transfer between the thermal management component 100 and the single cell 200 is achieved, and the overall structural strength of the battery pack is improved. The thermal management component 100 is provided with a heat exchange cavity inside, and the heat exchange cavity can be filled with a heat exchange medium, which absorbs the heat generated during the operation of the single cell 200 through the heat exchange medium or provides heat to the single cell 200 through the heat exchange medium. The thermal management component 100 also includes an interface 300, and two adjacent thermal management components 100 are connected through the interface 300.

[0036] In actual application, a charging interface for charging and a discharging interface for discharging may be provided on the box, and a battery management system and other modules may also be provided in the cavity inside the box.

[0037] Figure 2 A front view of a single battery is provided for an embodiment of the present disclosure. Figure 3 A front view of another single cell is provided for the embodiment of the present disclosure. Figure 2 and Figure 3 As shown, the single cell includes a top surface 10, a bottom surface 20 and two large surfaces 30. The top surface 10 is provided with a positive electrode connection terminal 11 and a negative electrode connection terminal 12, and the bottom surface 20 is arranged opposite to the top surface 10. The two large surfaces 30 are arranged opposite to each other and are both located between the top surface 10 and the bottom surface 20. For example, the two large surfaces 30 include a first large surface 31 and a second large surface 32.

[0038] Exemplarily, two side surfaces are further included between the top surface 10 and the bottom surface 20 , the two side surfaces are arranged opposite to each other, and the areas of the two side surfaces are both smaller than the area of ​​the large surface 30 .

[0039] Continue to refer Figure 2 and Figure 3 , a certain angle is formed between the two large surfaces 30. The two large surfaces 30 are not parallel, so that the two large surfaces 30 form an angle α. The specific angle of the angle α is not limited in the embodiment of the present disclosure.

[0040] Continue to refer Figure 2 , the angle between the large surface 30 and the top surface 10 can be an obtuse angle, that is, β is an obtuse angle.

[0041] The two large faces 30 may have the same angle with the top face 10. For example, the angle between the first large face 31 and the top face 10 is a first angle, and the angle between the second large face 32 and the top face 10 is a second angle, and the first angle is equal to the second angle, so that the single battery is an isosceles trapezoid.

[0042] Continue to refer Figure 3 , the angle between the large surface 30 and the top surface 10 can be an acute angle, that is, β is an obtuse angle.

[0043] The two large faces 30 may have the same angle with the top face 10. For example, the angle between the first large face 31 and the top face 10 is a first angle, and the angle between the second large face 32 and the top face 10 is a second angle, and the first angle is equal to the second angle, so that the single battery is an isosceles trapezoid.

[0044] Figure 2 The single cell shown is a first single cell 101, Figure 3 The single cell shown is a second single cell 102. The battery pack may include multiple first single cells 101 and multiple second single cells 102 at the same time. The angle between the large surface 30 and the top surface 10 of the first single cell 101 is a blunt angle, and the angle between the large surface 30 and the top surface 10 of the second single cell 102 is an acute angle.

[0045] Figure 4 The following is a diagram showing the arrangement of single cells in a battery pack in a normal state according to an embodiment of the present disclosure. Figure 4 As shown, the first single battery 101 and the second single battery 102 are arranged alternately. That is, the multiple single batteries in the battery pack are arranged in the relationship of the first single battery 101, the second single battery 102, the first single battery 101, the second single battery 102, and so on.

[0046] The included angle between the large surface 30 and the top surface 10 in the first single cell 101 is equal to the included angle between the large surface 30 and the top surface 10 in the second single cell 102 , so that the large surfaces 30 of two adjacent single cells are parallel or in contact with each other.

[0047] Exemplarily, a wedge-shaped space is formed between two adjacent first single cells 101 , the second single cell 102 is embedded in the wedge-shaped space, and the first single cell 101 and the second single cell 102 are matched in a wedge shape.

[0048] Figure 5 The following is a diagram showing the arrangement of the single cells of a battery pack in a squeezed state according to an embodiment of the present disclosure. Figure 5 As shown, when a single cell expands, the single cell squeezes the single cell adjacent to it. For example, when two first single cells 101 expand, the two first single cells 101 squeeze the second single cell 102 located between the two first single cells 101 at the same time, so that the second single cell 102 expands according to Figure 5 The upward movement in the vertical direction shown reduces the mutual squeezing of the single cells and improves the safety of the battery pack.

[0049] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A single cell battery, characterized in that: include: A top surface, wherein the top surface is provided with a positive electrode connection terminal and a negative electrode connection terminal; a bottom surface, the bottom surface being arranged opposite to the top surface; Two large surfaces, the two large surfaces are arranged opposite to each other and are both located between the top surface and the bottom surface, and a certain angle is formed between the two large surfaces.

2. The single cell according to claim 1, characterized in that: The included angle between the large surface and the top surface is an acute angle.

3. The single cell according to claim 2, characterized in that: The area of ​​the top surface is greater than the area of ​​the bottom surface.

4. The single cell according to claim 1, characterized in that: The included angle between the large surface and the top surface is an obtuse angle.

5. The single cell according to claim 4, characterized in that: The area of ​​the top surface is smaller than the area of ​​the bottom surface.

6. The single cell according to any one of claims 2 to 5, characterized in that: The included angles between the two large surfaces and the top surface are the same.

7. A battery pack, characterized in that: The invention comprises a box body and a plurality of single cells according to any one of claims 1 to 6 arranged in the box body.

8. The battery pack according to claim 7, characterized in that: The plurality of single cells include first single cells and second single cells, the first single cells and the second single cells are arranged alternately, the angle between the large surface and the top surface of the first single cells is an obtuse angle, and the angle between the large surface and the top surface of the second single cells is an acute angle.

9. The battery pack according to claim 8, characterized in that: A wedge-shaped space is formed between two adjacent first single cells, the second single cell is embedded in the wedge-shaped space, and the first single cell and the second single cell are matched in a wedge shape.

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