Battery pack and vehicle

Abstract

A battery pack and a vehicle. The battery pack comprises: a first battery group (10), a second battery group (20), a first case body (50), and a second case body (60). The first case body (50) and the second case body (60) are stacked, the first case body (50) has a first cavity (30), the first battery group (10) is accommodated in the first cavity (30), the second case body (60) has a second cavity (40), and the second battery group (20) is accommodated in the second cavity (40).

Description

Battery pack and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202322066185.3, filed on August 2, 2023, entitled “A Battery Pack and Vehicle,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery energy technology, and in particular to a battery pack and a vehicle. Background Art

[0004] In the prior art, in order to make the battery pack have a larger capacity, improve the endurance of the electric vehicle, and save the space occupied by the battery pack, two battery packs are usually provided in the battery pack and the two battery packs are stacked.

[0005] However, during research into existing technologies, the inventors discovered that achieving effective airtight isolation between stacked battery packs is difficult. If one battery pack loses control and emits hot, hazardous gases or electrolyte, this could easily spread to the other pack, damaging it and causing complete battery pack failure or even explosion, resulting in poor safety.

[0006] Summary of the Invention

[0007] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a battery pack in which a first cavity of a first box is used to provide a storage space for a first battery pack, and a second cavity of a second box is used to provide a storage space for a second battery pack, so that the first battery pack and the second battery pack are separated into different spaces, thereby achieving better airtight isolation between the first battery pack and the second battery pack.

[0008] The present application further proposes a vehicle having the above-mentioned battery pack.

[0009] The battery pack according to the present application includes: a first battery group, a second battery group, a first box and a second box; the first box and the second box are stacked, the first box has a first cavity, the first battery group is accommodated in the first cavity, the second box has a second cavity, and the second battery group is accommodated in the second cavity.

[0010] According to the battery pack of the present application, the first cavity of the first box is used to provide a storage space for the first battery pack, and the second cavity of the second box is used to provide a storage space for the second battery pack. Because the first box and the second box are stacked, the first cavity and the second cavity are separated, so that the first battery pack and the second battery pack are separated in different spaces, which can achieve good airtight isolation between the first battery pack and the second battery pack. If one battery pack loses control and sprays high-temperature and harmful gases or electrolytes, it will not harm the other battery pack, reducing the safety risk of complete failure or even explosion of the battery pack and improving the safety performance of the battery pack.

[0011] The vehicle according to the present application includes the above-mentioned battery pack, so the vehicle is safe to use.

[0012] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a schematic diagram of a partial structure of a battery pack according to an embodiment of the present application;

[0014] FIG2 is a second schematic diagram of a partial structure of a battery pack according to an embodiment of the present application;

[0015] FIG3 is a schematic structural diagram of a first cavity of a battery pack according to an embodiment of the present application;

[0016] FIG4 is a schematic structural diagram of a second cavity of a battery pack according to an embodiment of the present application.

[0017] Reference numerals:

[0018] 10. First battery pack; 20. Second battery pack; 30. First cavity; 40. Second cavity; 50. First box; 60. Second box; 51. First outer wall; 52. First bottom surface; 61. Second outer wall; 62. Second bottom surface; 70. Fastener; 63. Connecting end; 53. Connecting column; 64. Through hole; 54. Opening. DETAILED DESCRIPTION

[0019] The following describes in detail embodiments of the present application. 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 application and are not to be construed as limiting the present application.

[0020] 1 to 4 , schematic diagrams of the structure of a battery pack according to an embodiment of the present application are shown, which may include: a first battery pack 10 , a second battery pack 20 , a first box 50 , and a second box 60 ;

[0021] The first box 50 and the second box 60 are stacked. The first box 50 has a first cavity 30 in which the first battery pack 10 is accommodated. The second box 60 has a second cavity 40 in which the second battery pack 20 is accommodated.

[0022] In the embodiment of the present application, the first cavity 30 of the first box 50 is used to provide a storage space for the first battery pack 10, and the second cavity 40 of the second box 60 is used to provide a storage space for the second battery pack 20. Because the first box 50 and the second box 60 are stacked, the first cavity 30 and the second cavity 40 are separated, so that the first battery pack 10 and the second battery pack 20 are separated in different spaces, which can achieve good airtight isolation between the first battery pack 10 and the second battery pack 20. If one battery pack loses control and sprays high-temperature and harmful gases or electrolytes, it will not damage the other battery pack, thereby reducing the safety risks of complete failure or even explosion of the battery pack and improving the safety performance of the battery pack.

[0023] In the embodiment of the present application, the first box body 50 and the second box body 60 can be stacked and distributed in the vertical direction, so that the first cavity 30 and the second cavity 40 can be stacked and distributed in the vertical direction, so that the first battery pack 10 and the second battery pack 20 can be stacked, so that the battery pack has a larger capacity, improves the endurance of the electric vehicle, and saves the space occupied by the battery pack.

[0024] In the embodiment of the present application, the first battery pack 10 may be composed of at least one battery cell, and the second battery pack 20 may also be composed of at least one battery cell, with two adjacent battery cells electrically connected. For example, the battery cells may be lithium-ion cells, polymer lithium cells, or lithium iron phosphate cells, etc. The embodiment of the present application does not limit the specific type of battery cells.

[0025] For example, in the embodiment of the present application, the first box body 50 and the second box body 60 can be die-cast, so that the first box body 50 and the second box body 60 have good structural strength. The size of the first box body 50 can be larger than the size of the second box body 60, so that the second box body 60 can be more firmly connected to the first box body 50 and the first box body 50 provides a sealing surface for the second box body 60, so that the second box body 60 has a good sealing effect. In addition, the size of the first box body 50 can also be equal to the size of the second box body 60, and this embodiment of the present application is not limited to this.

[0026] In the embodiment of the present application, the first box body 50 includes a first outer wall 51 and a first bottom surface 52 connected to the first outer wall 51. The first outer wall 51 and the first bottom surface 52 together form the first cavity 30. In some embodiments, the first outer wall 51 is the entire side wall of the first box body 50, and the first outer wall 51 is connected to the outer periphery of the first bottom surface 52. In this way, the first battery pack 10 can be connected to the first bottom surface 52, that is, the first bottom surface 52 provides a placement position for the first battery pack 10, and the first outer wall 51 can surround the four sides of the first battery pack 10, so that the first outer wall 51 and the first bottom surface 52 together form the first cavity 30 for accommodating the first battery pack 10.

[0027] For example, in the embodiment of the present application, the cross-sectional shape of the first outer wall 51 can be rectangular, square, circular, etc., and can be set according to actual needs. The embodiment of the present application does not limit the specific shape of the first outer wall 51.

[0028] In the embodiment of the present application, the second box body 60 includes a second outer wall 61 and a second bottom surface 62 connected to the second outer wall 61. The second outer wall 61 is connected to the first bottom surface 52. The second outer wall 61 and the second bottom surface 62 enclose a second cavity 40. In some embodiments, the second outer wall 61 is the entire side wall of the second box body 60, and the second outer wall 61 is connected to the outer periphery of the second bottom surface 62. In this way, the second battery pack 20 can be connected to the second bottom surface 62, that is, the second bottom surface 62 provides a placement position for the second core module, and the second outer wall 61 can be enclosed around the second battery pack 20, so that the second outer wall 61 and the second bottom surface 62 enclose a second cavity 40 to accommodate the second battery pack 20. In addition, the second outer wall 61 is connected to the first bottom surface 52, so that the first bottom surface 52 of the first box body 50, the second outer wall 61, and the second bottom surface 62 form a sealed space, thereby achieving better airtight insulation for the second battery pack 20.

[0029] For example, in the embodiment of the present application, the cross-sectional shape of the second outer wall 61 can be rectangular, square, circular, etc., and can be set according to actual needs. The embodiment of the present application does not limit the specific shape of the second outer wall 61.

[0030] In some optional embodiments of the present application, the battery pack further includes a fastener 70, which is respectively connected to the second outer wall 61 and the first bottom surface 52 to connect the second box body 60 to the first box body 50. In this way, the fastener 70 can securely connect the second box body 60 to the first box body 50 by connecting the second outer wall 61 and the first bottom surface 52, thereby ensuring better connection reliability between the first box body 50 and the second box body 60.

[0031] Optionally, in an embodiment of the present application, the second outer wall 61 is provided with a connecting end 63, and the first bottom surface 52 is provided with a connecting post 53; the fastener 70 is passed through the connecting end 63 and embedded in the connecting post 53. In this way, the connecting end 63 provides a connection location for the fastener 70, avoiding damage to the integrity of the outer wall structure. In some embodiments, the connecting post 53 protrudes from the first bottom surface 52 and can be a common BOSS post, which can provide a mounting location for the first box body 50. As a result, the fastener 70 passes through the connecting end 63 and is embedded in the connecting post 53, achieving a stable connection between the first box body 50 and the second box body 60.

[0032] In the embodiment of the present application, the connecting column 53 is provided with a mounting groove, and the fastener 70 is embedded in the mounting groove. In this way, the mounting groove provides an embedding space for the fastener 70, thereby improving the connection reliability between the fastener 70 and the connecting column 53.

[0033] In some optional embodiments of the present application, the wall of the mounting slot is provided with a threaded structure, and at least a portion of the fastener 70 is threadedly connected to the threaded structure. In this way, the threaded structure further improves the connection stability between the fastener 70 and the connecting column 53, preventing the fastener 70 from easily slipping in the mounting slot and becoming unstable.

[0034] Optionally, in the embodiment of the present application, the connecting end 63 extends away from the outer surface of the second outer wall 61, and the connecting post 53 extends toward the connecting end 63. This allows the connecting end 63 to extend beyond the second outer wall 61, preventing interference therewith and facilitating the insertion of the fastener 70 into the connecting end 63. Furthermore, the connecting post 53 extends toward the connecting end 63, allowing the connecting post 53 and the connecting end 63 to be in the same vertical position, facilitating alignment and enabling the fastener 70 to be inserted through the connecting end 63 and embedded in the connecting post 53.

[0035] In the embodiment of the present application, the connection end 63 is provided with a through hole 64, and the fastener 70 is inserted into the through hole 64. The axis of the through hole 64 coincides with the axis of the connection post 53. By providing the through hole 64 in the connection end 63, the fastener 70 can easily pass through the connection end 63. Moreover, the axis of the through hole 64 can coincide with the axis of the connection post 53, making it easy to achieve alignment between the connection end 63 and the connection post 53, and not easily causing deviation that affects the reliability of the fixation.

[0036] For example, in the embodiment of the present application, the number of connection ends 63 can include multiple, and multiple connection ends 63 are spaced apart and arranged on the second outer wall 61. Accordingly, the number of connection posts 53 and the number of fasteners 70 can include multiple. In some embodiments, one fastener 70 is correspondingly provided through each connection end 63 and embedded in each connection post 53. The embodiment of the present application does not limit the specific number of connection ends 63, connection posts 53, and fasteners 70.

[0037] In the embodiment of the present application, for example, the fastener 70 is a bolt, a stud or a screw. It can be set according to actual needs, and the embodiment of the present application does not limit the specific type of the fastener 70.

[0038] In some optional embodiments of the present application, the battery pack further includes a busbar, which is disposed through the first bottom surface 52 and is electrically connected to the first battery pack 10 and the second battery pack 20. Thus, a relatively stable electrical connection is achieved between the first battery pack 10 and the second battery pack 20 via the busbar.

[0039] Optionally, in the embodiment of the present application, the first bottom surface 52 is provided with an opening 54, and the busbar is passed through the opening 54. In this way, the opening 54 facilitates the busbar to be passed through the first bottom surface 52 smoothly and conveniently, thereby improving the convenience of operation.

[0040] For example, in the embodiment of the present application, the shape of the opening 54 can be rectangular or square, or trapezoidal, and can be set according to the shape of the bus. The embodiment of the present application does not limit the specific shape of the opening 54.

[0041] In the embodiment of the present application, for example, the number of openings 54 can be set to 1, 2, or 3, etc., and multiple openings 54 can be arranged adjacent to each other or symmetrically, etc. Correspondingly, the number of busbars can also be set to 1, 2, or 3, etc., with one busbar correspondingly passing through one opening 54. The embodiment of the present application does not limit the specific number of openings 54 and busbars, nor the specific location of the openings 54.

[0042] In some optional embodiments of the present application, the battery pack further includes a sealant disposed around the periphery of the opening 54 to seal the opening 54. Thus, the sealant seals the opening 54 through which the busbar passes, thereby achieving a better sealing effect between the first battery pack 10 and the second battery pack 20, further improving the airtight isolation between the first battery pack 10 and the second battery pack 20.

[0043] For example, in the embodiments of the present application, the sealing member is a sealant or a sealing cotton. For example, adhesive or foam can be used, and rubber or silicone can also be used. These materials have good sealing effects and are widely available. The embodiments of the present application do not limit the specific type of the sealing member.

[0044] Optionally, the battery pack further includes a top cover connected to a side of the first box body 50 away from the second box body 60. In this way, the first box body 50 is sealed by the top cover, so that the top cover and the first box body 50 form a closed space, thereby achieving better airtight insulation performance for the first battery pack 10.

[0045] Optionally, in the embodiment of the present application, the battery pack further includes a power distribution module, which is disposed in at least one of the first cavity 30 and the second cavity 40. That is, the power distribution module can be disposed in the first cavity 30, the second cavity 40, or both the first cavity 30 and the second cavity 40. The power distribution module can be flexibly disposed according to actual needs, and the embodiment of the present application does not limit the specific location of the power distribution module.

[0046] An embodiment of the present application also provides a vehicle, which includes a battery pack.

[0047] In some embodiments, the vehicle is an electric vehicle, with a battery pack providing at least a portion of the vehicle's power. For example, the vehicle may include a compact car, a mid-size car, a sedan, a truck, a trailer, a CDV (Car Derived Van), an MPV (Multi-Purpose Vehicle), an SUV (Sport Utility Vehicle), and the like. The embodiments of this application are not limited to the specific type of vehicle; however, the vehicle according to this application is safer to use.

[0048] 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 the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0049] Although the embodiments of the present application 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 intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: The battery pack comprises: a first battery group (10), a second battery group (20), a first box (50) and a second box (60); The first box (50) and the second box (60) are stacked, the first box (50) having a first cavity (30), the first battery pack (10) being accommodated in the first cavity (30), the second box (60) having a second cavity (40), the second battery pack (20) being accommodated in the second cavity (40).

2. The battery pack according to claim 1, characterized in that: The first box body (50) comprises a first outer wall (51) and a first bottom surface (52) connected to the first outer wall (51); the first outer wall (51) and the first bottom surface (52) enclose the first cavity (30).

3. The battery pack according to claim 2, characterized in that: The second box body (60) comprises a second outer wall (61) and a second bottom surface (62) connected to the second outer wall (61); the second outer wall (61) is connected to the first bottom surface (52); the second outer wall (61) and the second bottom surface (62) enclose the second cavity (40).

4. The battery pack according to claim 3, characterized in that: The battery pack further comprises a fastener (70), wherein the fastener (70) is respectively connected to the second outer wall (61) and the first bottom surface (52) so as to connect the second box body (60) to the first box body (50).

5. The battery pack according to claim 4, characterized in that: The second outer wall (61) is provided with a connecting end (63), and the first bottom surface (52) is provided with a connecting column (53); The fastener (70) is passed through the connecting end (63) and embedded in the connecting column (53).

6. The battery pack according to claim 5, characterized in that: The connecting column (53) is provided with a mounting groove, and the fastener (70) is embedded in the mounting groove.

7. The battery pack according to claim 6, characterized in that: A groove wall of the installation groove is provided with a thread structure, and at least part of the fastener (70) is threadedly connected to the thread structure.

8. The battery pack according to claim 7, characterized in that: The connecting end (63) extends away from the outer surface of the second outer wall (61), and the connecting column (53) extends toward the connecting end (63).

9. The battery pack according to claim 5, characterized in that: The connecting end (63) is provided with a through hole (64), the fastener (70) is passed through the through hole (64), and the axis of the through hole (64) coincides with the axis of the connecting column (53).

10. The battery pack according to claim 5, characterized in that: The fastener (70) is one of a bolt, a stud or a screw.

11. The battery pack according to claim 2, characterized in that: The battery pack also includes a bus bar, which is arranged through the first bottom surface (52) and is electrically connected to the first battery group (10) and the second battery group (20) respectively.

12. The battery pack according to claim 11, characterized in that: The first bottom surface (52) is provided with an opening (54), and the busbar is passed through the opening (54).

13. The battery pack according to claim 12, characterized in that: The battery pack also includes a sealing member, which is arranged on the periphery of the opening (54) to seal the opening (54).

14. The battery pack according to claim 13, characterized in that: The sealing element is one of sealing glue or sealing cotton.

15. The battery pack according to claim 1, characterized in that: The battery pack further comprises a top cover, wherein the top cover is connected to a side of the first box body (50) away from the second box body (60).

16. The battery pack according to claim 1, characterized in that: The battery pack further comprises a power distribution module, wherein the power distribution module is arranged in at least one of the first cavity (30) and the second cavity (40).

17. A vehicle, characterized in that: The vehicle comprises the battery pack according to any one of claims 1-16.

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