Battery pack and vehicle

Abstract

The utility model discloses a battery pack and vehicle, battery pack includes: battery cell subassembly, battery cell subassembly includes first battery cell, second battery cell and third battery cell, first battery cell along first direction both sides respectively fit with second battery cell and third battery cell, first battery cell along second direction cross section shape parallelogram shape, second battery cell along second direction cross section shape parallelogram shape, third battery cell along the second direction cross section shape parallelogram shape parallelogram shape parallelogram shape parallelogram shape parallelogram shape parallelogram shape parallelogram shape parallelogram shape parallelogram shape parallelogram shape; the cross section of the second battery cell and the cross section of the third battery cell in the second direction are right-angled triangles, so that the cross section of the battery cell assembly in the second direction is rectangular, and the first direction is perpendicular to the second direction. According to the battery pack disclosed by the utility model, the battery pack has better cruising ability, and the structural safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, and more specifically, to a battery pack and a vehicle. Background Art

[0002] In the related art, in order to improve the volume grouping efficiency of the battery pack, the battery cells are formed into hexagonal battery cells. However, the hexagonal battery cells reduce the volume utilization rate of the battery pack and are not easy to meet the power demand of the battery pack. Utility Model Content

[0003] 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 pack, which can have good endurance and ensure structural safety.

[0004] Another object of the present invention is to provide a vehicle having the above-mentioned battery pack.

[0005] A battery pack according to an embodiment of the utility model includes: a battery cell assembly, wherein the battery cell assembly includes a first battery cell, a second battery cell and a third battery cell, wherein the first battery cell is respectively attached to the second battery cell and the third battery cell on both sides along the first direction, the shape of the cross section of the first battery cell along the second direction is a parallelogram, and the shape of the cross section of the second battery cell and the third battery cell along the second direction is a right triangle, so that the shape of the cross section of the battery cell assembly along the second direction is a rectangle, wherein the first direction and the second direction are perpendicular.

[0006] According to the battery pack of the embodiment of the utility model, the first battery cell is respectively attached to the second battery cell and the third battery cell on both sides along the first direction, the cross-section of the first battery cell along the second direction is a parallelogram, and the cross-section of the second battery cell and the third battery cell along the second direction is a right triangle, so that the cross-section of the battery cell assembly along the second direction is a rectangle. In this way, the volume utilization and space utilization of the battery cell assembly can be improved, the power of the battery pack can be increased within the limited battery pack space, which is conducive to improving the battery pack's endurance, and the structural safety of the battery cell assembly can be ensured, heat dissipation is facilitated, and thermal runaway can be effectively controlled.

[0007] In addition, the battery pack according to the above embodiment of the utility model may also have the following additional technical features:

[0008] According to the battery pack of some embodiments of the present invention, one of the angles of the parallelogram is 120°-160°.

[0009] According to some embodiments of the utility model, poles and explosion-proof valves are provided on the first battery cell, the second battery cell and the third battery cell, and multiple poles and multiple explosion-proof valves are located at opposite ends of the first battery cell, the second battery cell and the third battery cell along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0010] According to some embodiments of the present invention, the second battery cell and the third battery cell have the same structure and size.

[0011] According to some embodiments of the present invention, the first battery core includes a plurality of battery core components, the plurality of battery core components are arranged along the first direction and fit together, and the cross-section of the plurality of battery core components along the second direction is a parallelogram.

[0012] According to some embodiments of the present invention, there are multiple battery cell assemblies, and the multiple battery cell assemblies are arranged in sequence along the second direction and are flush at both ends along the first direction.

[0013] According to some embodiments of the present invention, the battery pack further includes: a cold plate, which is disposed at least on one side of the battery cell assembly to dissipate heat for the battery cell assembly.

[0014] According to some embodiments of the present invention, the first battery cell, the second battery cell and the third battery cell are connected by an adhesive.

[0015] According to some embodiments of the present invention, the battery pack further includes: an annular cable tie, the annular cable tie surrounds the battery cell assembly, and the battery cell assembly is located inside the annular cable tie.

[0016] A vehicle according to an embodiment of the present utility model includes a battery pack according to an embodiment of the present utility model.

[0017] According to the vehicle of the embodiment of the utility model, the first battery cell is respectively attached to the second battery cell and the third battery cell on both sides along the first direction, the cross-section of the first battery cell along the second direction is a parallelogram, and the cross-section of the second battery cell and the third battery cell along the second direction is a right triangle, so that the cross-section of the battery cell assembly along the second direction is a rectangle. In this way, the volume utilization and space utilization of the battery cell assembly can be improved, the power of the battery pack can be increased within the limited battery pack space, which is conducive to improving the endurance of the battery pack, and the structural safety of the battery cell assembly can be ensured, heat dissipation is facilitated, and thermal runaway can be effectively controlled.

[0018] 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

[0019] 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:

[0020] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the utility model;

[0021] Figure 2 is an exploded view of a battery pack according to an embodiment of the utility model at one angle;

[0022] Figure 3 is an exploded view of a battery pack according to an embodiment of the utility model from another angle;

[0023] Figure 4 is a partial structural schematic diagram of a battery pack according to an embodiment of the utility model;

[0024] Figure 5 It is a schematic structural diagram of a battery core component of a battery pack according to an embodiment of the utility model;

[0025] Figure 6 It is a schematic diagram of the structure of the second battery cell or the third battery cell of the battery pack according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] 100. Battery pack;

[0028] 10. battery cell assembly; 11. first battery cell; 12. second battery cell; 13. third battery cell; 14. pole; 111. battery cell component;

[0029] 20. Cold plate; 21. Structural adhesive;

[0030] 31. Shell; 32. Epoxy board. DETAILED DESCRIPTION

[0031] 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.

[0032] In the description of the present invention, 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them, the first feature "above", "above" and "above" the second feature may include the first feature being directly above and diagonally above the second feature, or may simply mean that the first feature is at a higher level than the second feature.

[0034] A battery pack 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0035] Reference Figure 1-Figure 6 As shown, the battery pack 100 according to the embodiment of the present invention may include: a battery cell assembly 10 .

[0036] Specifically, the battery cell assembly 10 includes a first battery cell 11, a second battery cell 12, and a third battery cell 13. The first battery cell 11 is arranged along a first direction (eg Figure 1 The two sides (left and right directions shown in FIG) are respectively attached to the second battery cell 12 and the third battery cell 13, which can effectively reduce the occupied space of the battery cell assembly 10.

[0037] In addition, if Figure 1-Figure 6 As shown, the first battery cell 11 is along the second direction (eg Figure 1 The shape of the cross section along the front-to-back direction (shown in the figure) is a parallelogram, and the shape of the cross section of the second battery cell 12 and the third battery cell 13 along the second direction is a right triangle, so that the shape of the cross section of the battery cell assembly 10 along the second direction is a rectangle, wherein the first direction and the second direction are perpendicular.

[0038] Thus, through the combination of the first battery cell 11, the second battery cell 12 and the third battery cell 13, the volume utilization rate of the battery cell assembly 10 can be improved. Compared with the hexagonal battery cell honeycomb arrangement in the related art, the battery cell assembly 10 of the utility model has a higher space utilization rate, making full use of the annular area and the internal space area around the battery pack 100, and improving the volume grouping efficiency of the battery pack 100, so as to increase the power of the battery pack 100 within the limited space of the battery pack 100, meet the required power demand, and help improve the endurance of the battery pack 100. At the same time, compared with a single structure, the combined structure of the battery cell assembly 10 of the utility model can ensure the structural safety of the battery cell assembly 10, facilitate heat dissipation, and effectively control thermal runaway.

[0039] It should be noted that, for the convenience of description, the directions such as "front and rear direction", "left and right direction" and "up and down direction" in the present invention are based on the direction relationships shown in the accompanying drawings, and are not limitations on the directions in actual application.

[0040] According to the battery pack 100 of the embodiment of the utility model, the first battery cell 11 is respectively attached to the second battery cell 12 and the third battery cell 13 on both sides along the first direction, and the cross-section of the first battery cell 11 along the second direction is a parallelogram, and the cross-section of the second battery cell 12 and the third battery cell 13 along the second direction is a right triangle, so that the cross-section of the battery cell assembly 10 along the second direction is a rectangle. In this way, the volume utilization rate and space utilization rate of the battery cell assembly 10 can be improved, and the power of the battery pack 100 can be increased within the limited space of the battery pack 100, which is conducive to improving the endurance of the battery pack 100, and can ensure the structural safety of the battery cell assembly 10, facilitate heat dissipation, and effectively control thermal runaway.

[0041] In some embodiments of the present invention, Figure 5 As shown, one of the angles of the parallelogram is 120°-160°, that is, one of the angles of the parallelogram is α and satisfies 120°≤α≤160°. Within the above angle range, the structural requirements of the parallelogram can be met, the first battery cell 11 can be processed and manufactured, and the first battery cell 11 is easy to be assembled with the second battery cell 12 and the third battery cell 13 to meet the required assembly requirements. For example, in some specific embodiments, one of the angles of the parallelogram can be 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0042] According to some embodiments of the present invention, Figure 1-Figure 6As shown, the first battery cell 11, the second battery cell 12 and the third battery cell 13 are provided with poles 14 and explosion-proof valves, and the poles 14 facilitate the interconnection of the first battery cell 11, the second battery cell 12 and the third battery cell 13 to meet the required electrical connection requirements, and when thermal runaway occurs, the first battery cell 11, the second battery cell 12 and the third battery cell 13 can be depressurized and exhausted through the explosion-proof valve to release the internal pressure and ensure the safety of the battery cell assembly 10. For example, the poles 14 include positive poles 14 and negative poles 14 to meet the required connection requirements.

[0043] In addition, a plurality of poles 14 and a plurality of explosion-proof valves are located in the first battery cell 11, the second battery cell 12, and the third battery cell 13 along the third direction (eg Figure 3 The first, second and third directions are perpendicular to each other. Thus, the first battery cell 11, the second battery cell 12 and the third battery cell 13 are electrically connected at one end along the first direction, and the other end is vented for thermal runaway, thereby achieving thermal and electrical separation of the battery cell assembly 10, which is beneficial to improving the safety performance of the battery pack 100.

[0044] In some embodiments of the present invention, Figure 1-Figure 4 , Figure 6 As shown, the second battery cell 12 and the third battery cell 13 have the same structure and size, which facilitates the processing and manufacturing of the second battery cell 12 and the third battery cell 13, can achieve the commonality of the second battery cell 12 and the third battery cell 13, is beneficial to reducing the cost of processing the second battery cell 12 and the third battery cell 13 separately, and is convenient for assembly, which is beneficial to improving assembly efficiency.

[0045] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, the first battery cell 11 includes a plurality of battery core pieces 111, which are arranged along the first direction and fit together, and the cross-section of the plurality of battery core pieces 111 along the second direction is in the shape of a parallelogram, which facilitates the mutual assembly of the plurality of battery core pieces 111, and can improve the volume utilization of the battery cell assembly 10, so that the space utilization of the battery cell assembly 10 is high, and the volume grouping efficiency of the battery pack 100 is improved, so that the power of the battery pack 100 can be increased within the limited space of the battery pack 100, which is conducive to improving the endurance of the battery pack 100. At the same time, the structural safety of the battery cell assembly 10 can be ensured through the plurality of battery core pieces 111, which is convenient for heat dissipation and effectively controls thermal runaway.

[0046] In the embodiment of the present invention, the number of the battery cores 111 can be flexibly set according to actual conditions. For example, the battery cores 111 can be Figure 4 Four are shown, but there may be two, three, five, six or more, all of which are within the protection scope of the present utility model.

[0047] In some specific embodiments, Figure 1-Figure 6 As shown, two of the angles of the parallelogram of the battery cell 111 can be 45°, and the other two angles of the parallelogram can be 135°, so that the shape of the cross section of the battery cell 111 along the second direction is a rhombus, and multiple battery cell components 111 are arranged along the first direction, and the side lengths of the rhombuses of the multiple battery cell components 111 are mutually attached, so that the shape of the cross section of the first battery cell 11 along the second direction is a rhombus. The shape of the cross section of the second battery cell 12 and the third battery cell 13 along the second direction is an isosceles right triangle, and the length of the hypotenuse of the isosceles right triangle is equal to the length of the side of the rhombus of the first battery cell 11. The second battery cell 12 and the third battery cell 13 have the same structure and size, and the length of the hypotenuse of the isosceles right triangle fits the length of the side of the rhombus of the first battery cell 11, so that the shape of the cross section of the battery cell assembly 10 along the second direction is a rectangle, which improves the volume utilization and space utilization of the battery cell assembly 10, makes full use of the annular area around the battery pack 100 and the internal space area, improves the volume grouping efficiency of the battery pack 100, and facilitates assembly, which is beneficial to improving assembly efficiency.

[0048] In some embodiments of the present invention, Figure 1-Figure 4 As shown, there are multiple (greater than or equal to two) battery cell assemblies 10, and the multiple battery cell assemblies 10 are arranged in sequence along the second direction, and the two ends of the multiple battery cell assemblies 10 along the first direction are flush, so that the cross-section of the multiple battery cell assemblies 10 along the second direction is rectangular, which can improve the volume utilization of the battery cell assembly 10, so that the space utilization of the battery cell assembly 10 is higher, and the annular area and the internal space area around the battery pack 100 are fully utilized, thereby improving the volume grouping efficiency of the battery pack 100, and the power demand of the battery pack 100 can be met by the multiple battery cell assemblies 10, which is beneficial to improving the endurance of the battery pack 100.

[0049] According to some embodiments of the present invention, Figure 2 and Figure 3 As shown, the battery pack 100 further includes a cold plate 20, which is disposed at least on one side of the battery cell assembly 10 (eg Figure 3 The lower side shown in FIG), so that the cold plate 20 can dissipate heat for the battery cell assembly 10, meet the heat dissipation requirements of the battery cell assembly 10, and help to extend the service life of the battery pack 100.

[0050] In some embodiments, Figure 2 and Figure 3 As shown, the cold plate 20 can be connected to the battery cell assembly 10 through the structural adhesive 21 to ensure that the battery cell assembly 10 and the cold plate 20 are reliably connected, and the structural adhesive 21 can conduct heat to the battery cell assembly 10 and the cold plate 20, so that the heat conduction effect is good and heat dissipation is convenient.

[0051] In some embodiments of the utility model, the first battery cell 11, the second battery cell 12 and the third battery cell 13 are connected by an adhesive to ensure that the first battery cell 11, the second battery cell 12 and the third battery cell 13 are reliably connected to each other, so that the battery cell assembly 10 can form a whole, which is beneficial to improve the structural strength of the battery pack 100, effectively improve the anti-extrusion ability of the battery pack 100, and improve the structural safety of the battery pack 100. For example, the adhesive can be a structural adhesive.

[0052] In some embodiments, Figure 1-Figure 3 As shown, the battery pack 100 further includes a shell 31 , and the battery cell assembly 10 is disposed in the shell 31 , which is convenient for placing the battery cell assembly 10 , and the battery cell assembly 10 can be protected by the shell 31 to prevent the battery cell assembly 10 from being exposed and damaged.

[0053] In some embodiments, Figure 1-Figure 3 As shown, an epoxy plate 32 is provided between at least one side of the battery cell assembly 10 and the shell 31 . The epoxy plate 32 can provide good heat insulation, thereby preventing the battery cell assembly 10 from being damaged by high temperatures and other problems, and can enhance the structural strength of the battery pack 100 .

[0054] In some specific embodiments, Figure 2 and Figure 3 As shown, epoxy plates 32 are respectively provided on both sides of the battery cell assembly 10 along the first direction, and the epoxy plates 32 are connected to the battery cell assembly 10 and the shell 31 by the structural adhesive 21, ensuring that the battery cell assembly 10, the epoxy plate 32 and the shell 31 are reliably connected, so that the battery cell assembly 10, the epoxy plate 32 and the shell 31 can form a whole, which is beneficial to improve the structural strength of the battery pack 100, effectively improve the anti-extrusion ability of the battery pack 100, and improve the structural safety of the battery pack 100.

[0055] According to some embodiments of the utility model, the battery pack 100 also includes an annular cable tie, which surrounds the battery cell assembly 10. The battery cell assembly 10 is located in the annular cable tie, and the battery cell assembly 10 can be bundled by the annular cable tie, that is, the first battery cell 11, the second battery cell 12 and the third battery cell 13 can be bundled by the annular cable tie, ensuring that the first battery cell 11, the second battery cell 12 and the third battery cell 13 are reliably fixed, meeting the fixing requirements of the battery cell assembly 10, and helping to improve the structural strength and rigidity of the battery pack 100.

[0056] In some embodiments, the annular cable tie is made of steel, so that the annular cable tie can have good structural strength, ensuring reliable fixation of the first battery cell 11 , the second battery cell 12 and the third battery cell 13 .

[0057] The vehicle according to the embodiment of the utility model includes the battery pack 100 according to the embodiment of the utility model. Since the battery pack 100 according to the embodiment of the utility model has the above-mentioned beneficial technical effects, the vehicle according to the embodiment of the utility model is formed by the first battery cell 11 being respectively attached to the second battery cell 12 and the third battery cell 13 on both sides along the first direction, and the cross-section of the first battery cell 11 along the second direction is a parallelogram, and the cross-section of the second battery cell 12 and the third battery cell 13 along the second direction is a right triangle, so that the cross-section of the battery cell assembly 10 along the second direction is a rectangle. In this way, the volume utilization rate and space utilization rate of the battery cell assembly 10 can be improved, and the power of the battery pack 100 can be increased within the limited space of the battery pack 100, which is conducive to improving the endurance of the battery pack 100, and can ensure the structural safety of the battery cell assembly 10, facilitate heat dissipation, and effectively control thermal runaway.

[0058] In some embodiments, the vehicle may be a new energy vehicle. The battery pack 100 of the present invention is applied to the new energy vehicle. By improving the endurance of the battery pack 100 , the power usage demand of the battery pack 100 of the new energy vehicle can be met.

[0059] The other structures and operations of the battery pack 100 and the vehicle according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0060] 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.

[0061] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example", etc. 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.

[0062] 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 pack, characterized in that: include: A battery cell assembly, the battery cell assembly comprising a first battery cell, a second battery cell and a third battery cell, the first battery cell being respectively bonded to the second battery cell and the third battery cell on both sides along a first direction, the cross-section of the first battery cell along a second direction being a parallelogram, the cross-sections of the second battery cell and the third battery cell along the second direction being right triangles, so that the cross-section of the battery cell assembly along the second direction is a rectangle, wherein the first direction and the second direction are perpendicular.

2. The battery pack according to claim 1, characterized in that: One of the angles of the parallelogram is 120°-160°.

3. The battery pack according to claim 1, characterized in that: The first battery cell, the second battery cell and the third battery cell are each provided with a pole and an explosion-proof valve, and a plurality of the poles and a plurality of the explosion-proof valves are located at opposite ends of the first battery cell, the second battery cell and the third battery cell along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

4. The battery pack according to claim 3, characterized in that: The second battery cell and the third battery cell have the same structure and size.

5. The battery pack according to claim 1, characterized in that: The first battery core includes a plurality of battery core components, the plurality of battery core components are arranged along the first direction and adhere to each other, and the cross-section of the plurality of battery core components along the second direction is a parallelogram.

6. The battery pack according to claim 1, characterized in that: There are a plurality of battery cell assemblies, which are arranged in sequence along the second direction and have both ends aligned along the first direction.

7. The battery pack according to claim 1, characterized in that: Also includes: A cold plate is provided at least on one side of the battery cell assembly to dissipate heat for the battery cell assembly.

8. The battery pack according to claim 1, characterized in that: The first battery cell, the second battery cell and the third battery cell are connected by an adhesive.

9. The battery pack according to claim 1, characterized in that: Also includes: An annular cable tie surrounds the battery core assembly, and the battery core assembly is located inside the annular cable tie.

10. A vehicle, characterized in that: Comprising a battery pack according to any one of claims 1-9.

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