Battery shell and battery

Abstract

The utility model discloses a battery shell and a battery. The battery shell comprises an outer shell and an inner shell, the cross section of the shell is polygonal; the inner shell is arranged in the outer shell and connected with the outer shell, and the cross section of the inner shell is circular. According to the battery shell disclosed by the embodiment of the utility model, the shell comprises the outer shell and the inner shell arranged in the outer shell, so that the rigidity of the battery shell can be effectively improved, the deformation of the battery shell can be reduced, and the overall rigidity of the battery can be improved; moreover, the cross section of the shell is polygonal, so that a plurality of batteries can be conveniently grouped, and the reliability of connection and combination of the plurality of batteries can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery shell and a battery. Background Art

[0002] In the related art, the shell of cylindrical batteries is prone to deformation, and cylindrical batteries are not easy to arrange in groups. Therefore, there is room for improvement. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a battery housing that, by comprising an outer shell and an inner shell disposed within the outer shell, effectively improves the rigidity of the battery housing, reduces deformation of the battery housing, and improves the overall rigidity of the battery. Furthermore, the outer shell has a polygonal cross-section, which facilitates grouping of multiple batteries, thereby improving the reliability of the connection of multiple batteries.

[0004] The utility model also provides a battery having the battery shell.

[0005] According to the first embodiment of the present invention, the battery case includes: an outer shell having a polygonal cross-section; and an inner shell disposed inside and connected to the outer shell, having a circular cross-section.

[0006] According to the battery housing of the embodiment of the present invention, by being configured to include an outer shell and an inner shell arranged within the outer shell, the rigidity of the battery housing can be effectively improved, the deformation of the battery housing can be reduced, and it is also beneficial to improve the overall rigidity of the battery; and the cross-section of the outer shell is in the shape of a polygon, which can facilitate the grouping of multiple batteries, thereby improving the reliability of the connection combination of multiple batteries.

[0007] According to some embodiments of the present invention, the cross-section of the shell is in the shape of a regular polygon.

[0008] According to some embodiments of the present invention, the cross-section of the outer shell is a regular hexagon; and / or the cross-section of the outer shell is a first figure, the cross-section of the inner shell is a second figure, and the second figure constitutes an inscribed circle of the first figure.

[0009] According to some embodiments of the present invention, a ventilation cavity is defined between the outer shell and the inner shell, and the ventilation cavity is communicated with the outside of the battery housing.

[0010] According to some embodiments of the present invention, at least one side of the battery housing in the axial direction has a vent, and the vent connects the vent cavity with the outside of the battery housing.

[0011] According to some embodiments of the present invention, the ventilation cavity includes a plurality of sub-ventilation cavities spaced apart along the circumference of the inner shell, and each of the sub-ventilation cavities is communicated with the outside of the battery housing.

[0012] According to some embodiments of the present invention, the wall thickness of the outer shell is T1, and the wall thickness of the inner shell is T2; wherein, the value range of T1 is 0.1mm~0.5mm, and the value range of T2 is 0.1mm~0.5mm.

[0013] According to some embodiments of the present invention, the wall thickness of the outer shell is T1, the wall thickness of the inner shell is T2, and the wall thickness of the joining area of ​​the battery shell is T3, and the joining area of ​​the battery shell is the connection area between the outer shell and the inner shell; wherein, T1, T2, and T3 satisfy: a≤T3≤b, the value of a is T1 or T2, and the value of b is T1+T2.

[0014] According to some embodiments of the present invention, the outer shell is connected to the inner shell by welding; or the outer shell and the inner shell are integrally extruded.

[0015] A battery according to an embodiment of the second aspect of the present invention includes: a battery housing according to the embodiment of the first aspect of the present invention; and a battery cell disposed in the battery housing.

[0016] According to the battery of the embodiment of the present invention, by providing the above-mentioned battery housing, the battery housing is configured to include an outer shell and an inner shell provided within the outer shell, which can effectively improve the rigidity of the battery housing, reduce the deformation of the battery housing, and also help to improve the overall rigidity of the battery; and the cross-section of the outer shell is in the shape of a polygon, which can facilitate the grouping of multiple batteries, thereby improving the reliability of the connection combination of multiple batteries.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a perspective schematic diagram of a battery housing according to some embodiments of the present utility model;

[0020] Figure 2 yes Figure 1 A top view of the battery housing in FIG.

[0021] Figure 3 yes Figure 1Schematic diagram of the combination of multiple battery shells.

[0022] Reference numerals:

[0023] 100. Battery housing;

[0024] 1. Outer shell; 2. Inner shell; 3. Sub-ventilation cavity; 4. Vent. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail. 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0026] Reference below Figure 1-Figure 3 A battery housing 100 according to an embodiment of the present invention is described.

[0027] Reference Figure 1 and Figure 2 According to the first embodiment of the present invention, a battery casing 100 comprises an outer casing 1 and an inner casing 2. The outer casing 1 has a polygonal cross-section; the inner casing 2 is disposed within and connected to the outer casing 1, and has a circular cross-section. By configuring the battery casing 100 as comprising the outer casing 1 and the inner casing 2 disposed within the outer casing 1, with the inner casing 2 disposed within and connected to the outer casing 1, the rigidity of the battery casing 100 can be effectively improved, thereby facilitating the improvement of the rigidity of the battery as a whole.

[0028] Furthermore, the cross section of the housing 1 is polygonal, which facilitates grouping of multiple batteries.

[0029] In the description of the present invention, “plurality” means two or more.

[0030] For example, when the cross-section of the outer shell 1 is in the shape of a circle, since the circle is easy to move, when multiple batteries with circular cross-sections of the outer shell 1 are combined, the multiple circles cannot form a stable arrangement; when the cross-section of the outer shell 1 is in the shape of a polygon, since polygons are more stable than circles, when multiple batteries with polygonal cross-sections of the outer shell 1 (such as triangles, quadrilaterals, pentagons, etc.) are connected, the multiple polygons can form a relatively stable arrangement, which can facilitate the grouping of multiple batteries, thereby improving the reliability of the connection combination of multiple batteries.

[0031] Optionally, the battery housing 100 may be an aluminum alloy part or a steel part.

[0032] According to the battery housing 100 of the embodiment of the present invention, by being configured to include an outer shell 1 and an inner shell 2 arranged within the outer shell 1, the rigidity of the battery housing 100 can be effectively improved, the deformation of the battery housing 100 can be reduced, and it is also beneficial to improve the rigidity of the battery as a whole; and the cross-section of the outer shell 1 is in the shape of a polygon, which can facilitate the grouping of multiple batteries, thereby improving the reliability of the connection combination of multiple batteries.

[0033] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, the cross-section of the housing 1 is in the shape of a regular polygon. Since the length of each side of the regular polygon and the angle of each vertex are the same, it is convenient to connect and combine multiple batteries and the overall structure of the battery pack can be compact.

[0034] For example, when multiple batteries need to be grouped, since each side and vertex angle of the regular polygon are the same, there can be multiple arrangement methods (for example, any side of a regular polygon can be fitted with any side of another regular polygon), so that the multiple batteries can be arranged to form a stable combination and the overall structure of the grouped batteries can be compact.

[0035] Reference Figure 2 According to some embodiments of the present invention, the cross-section of the housing 1 is in the shape of a regular hexagon. Since the angles of each vertex of the regular hexagon are 120°, it is convenient to arrange multiple batteries to form a stable combination and the overall structure of the batteries after being grouped can be compact.

[0036] For example, when three batteries are grouped, by combining any corner of the regular hexagon of the cross section of the housing 1 of each battery to form a 360° structure, a stable combination can be formed and the overall structure of the three batteries after grouping is relatively compact.

[0037] Reference Figure 2 According to some embodiments of the present invention, the cross-section of the outer shell 1 is a first figure, and the cross-section of the inner shell 2 is a second figure. The second figure constitutes an inscribed circle of the first figure. The inscribed circle can ensure that the area of ​​the second figure relative to the first figure is maximized. Since the inner shell 2 is arranged in the outer shell 1, the space inside the inner shell 2 can be maximized, thereby maximizing the volume of the electrode group in the battery casing 100, which is beneficial to improving the capacity ratio of the battery per unit volume.

[0038] Reference Figure 2According to some embodiments of the present invention, the cross-section of the outer shell 1 is a regular hexagon; furthermore, the cross-section of the outer shell 1 is a first shape, and the cross-section of the inner shell 2 is a second shape, with the second shape forming an inscribed circle of the first shape. Since each vertex angle of the regular hexagon is 120°, multiple batteries can be arranged to form a stable combination, and the overall structure of the battery group can be compact. Furthermore, the inscribed circle ensures that the area of ​​the second shape is maximized relative to the first shape. Since the inner shell 2 is disposed within the outer shell 1, the space inside the inner shell 2 is maximized, thereby maximizing the volume of the electrode group within the battery housing 100, which is beneficial for improving the battery's capacity per unit volume.

[0039] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, a ventilation cavity is defined between the outer shell 1 and the inner shell 2, and the ventilation cavity is connected to the outside of the battery housing 100, which can increase the heat dissipation area of ​​the battery housing 100, thereby improving the heat dissipation effect of the battery housing 100; and the ventilation cavity has the function of buffering external impact force, which can enhance the protection capability of the electrode group in the battery housing 100.

[0040] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, the axial direction of the battery housing 100 (for example, referring to Figure 1 At least one side of the battery housing 100 (in the e1 direction) has a vent 4, which connects the vent cavity with the outside of the battery housing 100, facilitating the heat in the vent cavity to be transferred from the vent 4 to the outside of the battery housing 100, thereby completing the process of heat generated by the electrode group in the battery housing 100 being dissipated to the outside of the battery housing 100 through the vent cavity.

[0041] The battery housing 100 may have a vent 4 on at least one side in the axial direction, which may include the following situations: for example, the battery housing 100 may have a vent 4 on one side in the axial direction, and not on the other side; for another example, the battery housing 100 may have a vent 4 on both sides in the axial direction.

[0042] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, the ventilation cavity includes a plurality of sub-ventilation cavities 3 arranged at intervals along the circumference of the inner shell 2. The plurality of sub-ventilation cavities 3 increase the ventilation and heat dissipation channels of the battery shell 100, which can further improve the heat dissipation effect of the battery shell 100; and the plurality of sub-ventilation cavities 3 arranged at intervals along the circumference of the inner shell 2 can make the heat dissipation of the battery shell 100 uniform.

[0043] Alternatively, a vent 4 may be provided on one side of the battery housing 100 in the axial direction, and the vent 4 connects the vent cavity with the exterior of the battery housing 100. The number of vents 4 is the same as the number of sub-vent cavities 3, and they correspond one-to-one. Since each sub-vent cavity 3 is connected to a vent 4, the heat of each sub-vent cavity 3 is transferred to the exterior of the battery housing 100 through the corresponding vent 4, thereby accelerating the heat dissipation of the battery housing 100.

[0044] Reference Figure 2 According to some embodiments of the present invention, the wall thickness of the outer shell 1 is T1, and the wall thickness of the inner shell 2 is T2; wherein the value range of T1 is 0.1mm to 0.5mm, and the value range of T2 is 0.1mm to 0.5mm. For example, the wall thickness T1 of the outer shell 1 can be 0.1mm, 0.2mm, 0.25mm, 0.4mm, 0.5mm, etc., and the wall thickness T2 of the inner shell 2 can be 0.1mm, 0.2mm, 0.25mm, 0.4mm, 0.5mm, etc.

[0045] By ensuring that the wall thickness T1 of the outer shell 1 is not less than 0.1 mm and the wall thickness T2 of the inner shell 2 is not less than 0.1 mm, the rigidity of the outer shell 1 and the inner shell 2 is sufficient to withstand a certain degree of external impact, thereby extending the service life of the battery shell 100; by ensuring that the wall thickness T1 of the outer shell 1 is not greater than 0.5 mm and the wall thickness T2 of the inner shell 2 is not greater than 0.5 mm, the weight of the outer shell 1 and the inner shell 2 can be avoided from being excessive, which is conducive to lightweighting of the battery shell 100.

[0046] By setting the wall thickness T1 of the outer shell 1 to a value range of 0.1 mm to 0.5 mm and the wall thickness T2 of the inner shell 2 to a value range of 0.1 mm to 0.5 mm, it can be ensured that the rigidity of the outer shell 1 and the inner shell 2 is sufficient to withstand a certain degree of external impact, thereby extending the service life of the battery shell 100; and, the weight of the outer shell 1 and the inner shell 2 can be avoided to be excessive, which is conducive to the lightweighting of the battery shell 100.

[0047] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, the outer shell 1 has a wall thickness of T1, the inner shell 2 has a wall thickness of T2, and the junction area of ​​the battery housing 100 has a wall thickness of T3. The junction area of ​​the battery housing 100 is the connection area between the outer shell 1 and the inner shell 2. T1, T2, and T3 satisfy the following conditions: a≤T3≤b, where a is T1 or T2, and b is T1+T2. The value range of T3 may include the following: for example, when the value of T1 is less than T2, the value range of T3 is T1≤T3≤T1+T2; for another example, when the value of T2 is less than T1, the value range of T3 is T2≤T3≤T1+T2.

[0048] By ensuring that the wall thickness T3 of the joining area is not less than the wall thickness T1 of the outer shell 1 or the wall thickness T2 of the inner shell 2, the rigidity of the wall thickness T3 of the joining area can be ensured to be sufficient; by ensuring that the wall thickness T3 of the joining area is not greater than the sum of the wall thicknesses T1+T2 of the inner shell 2 and the outer shell 1, the thickness T3 of the joining area can be avoided to be too large, which may lead to excessive weight of the joining area.

[0049] By making the value range of the wall thickness T3 of the joint area between the wall thickness T1 of the outer shell 1 or the wall thickness T2 of the inner shell 2 and the sum of the wall thicknesses T1+T2 of the inner shell 2 and the outer shell 1, it can be ensured that the wall thickness T3 of the joint area has sufficient rigidity, and it can be avoided that the thickness T3 of the joint area is too large, which leads to excessive weight of the joint area.

[0050] Reference Figure 2 According to some embodiments of the present invention, the outer shell 1 and the inner shell 2 are connected by welding, which can make the connection between the outer shell 1 and the inner shell 2 simple and have strong stability.

[0051] Reference Figure 2 According to some embodiments of the present invention, the outer shell 1 and the inner shell 2 are integrally extruded, which can simplify the molding process, reduce the assembly steps of the outer shell 1 and the inner shell 2, and improve production efficiency.

[0052] Reference Figure 3 The battery according to the second embodiment of the present invention includes: a battery shell 100 and a battery cell. The battery shell 100 is the battery shell 100 according to the first embodiment of the present invention, and the battery cell is arranged in the battery shell 100.

[0053] According to the battery of the embodiment of the present invention, by providing the above-mentioned battery housing 100, the battery housing 100 is configured to include an outer shell 1 and an inner shell 2 provided within the outer shell 1, which can effectively improve the rigidity of the battery housing 100, reduce the deformation of the battery housing 100, and also help to improve the overall rigidity of the battery; and the cross-section of the outer shell 1 is in the shape of a polygon, which can facilitate the grouping of multiple batteries, thereby improving the reliability of the connection combination of multiple batteries.

[0054] Throughout this specification, reference to terms such as "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 that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0055] 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 purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery housing, characterized in that: include: A shell, wherein the cross-section of the shell is in the shape of a polygon; The inner shell is arranged in the outer shell and connected to the outer shell, and the cross section of the inner shell is circular.

2. The battery housing according to claim 1, characterized in that: The cross section of the shell is in the shape of a regular polygon.

3. The battery housing according to claim 2, characterized in that: The cross section of the outer shell is in the shape of a regular hexagon; and / or the cross section of the outer shell is in the shape of a first figure, the cross section of the inner shell is in the shape of a second figure, and the second figure constitutes an inscribed circle of the first figure.

4. The battery housing according to claim 1, characterized in that: A ventilation cavity is defined between the outer shell and the inner shell, and the ventilation cavity is communicated with the outside of the battery housing.

5. The battery casing according to claim 4, characterized in that: At least one side of the battery housing in the axial direction has a vent hole, and the vent hole communicates the vent cavity with the outside of the battery housing.

6. The battery case according to claim 4, characterized in that: The ventilation cavity includes a plurality of sub-ventilation cavities spaced apart along the circumference of the inner shell, and each of the sub-ventilation cavities is communicated with the outside of the battery housing.

7. The battery housing according to claim 1, characterized in that: The wall thickness of the outer shell is T1, and the wall thickness of the inner shell is T2; Among them, the value range of T1 is 0.1mm~0.5mm, and the value range of T2 is 0.1mm~0.5mm.

8. The battery casing according to claim 1, characterized in that: The wall thickness of the outer shell is T1, the wall thickness of the inner shell is T2, the wall thickness of the joint area of ​​the battery shell is T3, and the joint area of ​​the battery shell is the connection area between the outer shell and the inner shell; Among them, T1, T2, and T3 satisfy: a≤T3≤b, the value of a is T1 or T2, and the value of b is T1+T2.

9. The battery housing according to any one of claims 1 to 8, characterized in that: The outer shell is connected to the inner shell by welding; or the outer shell and the inner shell are integrally extruded.

10. A battery, characterized in that: include: The battery housing according to any one of claims 1 to 9; The battery cell is arranged in the battery casing.

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