Battery pack for a vehicle and vehicle

Abstract

The application discloses a battery pack for a vehicle and the vehicle, the battery pack comprises: a shell, a mounting cavity is formed in the shell; an electric core arranged in the mounting cavity; an expansion beam arranged on both sides of the electric core along a first direction; a reinforcing piece arranged on the upper surface of the electric core and extending along the first direction, and the reinforcing piece is connected with the expansion beam at both ends along the first direction. According to the battery pack for the vehicle, the reinforcing piece is arranged to fix the electric core, and the safety of the electric core is ensured.

Description

Technical Field

[0001] This application relates to the field of batteries, and more particularly to a battery pack for a vehicle and a vehicle. Background Technology

[0002] In related technologies, to improve the energy density of battery systems, the arrangement of cells inside the battery pack has shifted from CTM (Cell to Module) technology to CTP (Cell to Pack) technology. CTP technology involves directly arranging the cells inside the pack, which cannot be secured with bolts. The cells can only be fixed using adhesive bonding at the bottom, and there is no effective restraint or fixation on the top and sides. Under vibration and impact conditions, the battery is prone to failure due to adhesive issues, leading to cell loosening and battery failure. Furthermore, during charging and discharging, the cells expand and contract, impacting the pack's expansion beams, which can easily damage the beams, preventing them from rebounding and causing cell cycle failure. Therefore, how to effectively restrain the cells is a technical challenge. Utility Model Content

[0003] This application aims to at least address one of the technical problems existing in the prior art. To this end, one objective of this application is to provide a battery pack for vehicles that utilizes reinforcing members to secure the battery cells and ensure their safety.

[0004] This application also proposes a vehicle having the aforementioned battery pack.

[0005] A battery pack for a vehicle according to an embodiment of this application includes: a housing having a mounting cavity formed therein; battery cells arranged in the mounting cavity; an expansion beam disposed on the housing and located on both sides of the battery cells along a first direction; and a reinforcing member disposed on the upper surface of the battery cells and extending along the first direction, wherein the two ends of the reinforcing member along the first direction are respectively connected to the expansion beam.

[0006] According to an embodiment of this application, a battery pack for a vehicle is provided with a reinforcing member. The reinforcing member can be disposed on the upper surface of the battery cell, and an expansion beam can be disposed on both sides of the battery cell along a first direction. The reinforcing member can extend along the first direction, and both sides of the reinforcing member along the first direction can be connected to the expansion beam respectively. Therefore, the reinforcing member can limit the battery cell in the height direction while preventing the expansion beam from shifting or deforming, so that the battery cell can be housed in the casing, thereby limiting the battery cell and ensuring its safety.

[0007] In some embodiments of this application, there are multiple reinforcing members, which are arranged at intervals along a second direction, the second direction being orthogonal to the first direction.

[0008] In some embodiments of this application, the reinforcing member includes: a first plate connected to the upper surface of the battery cell; and a second plate disposed on the side of the first plate away from the battery cell and connected to the first plate, wherein the second plate is connected to the expansion beam on both sides along the first direction.

[0009] In some embodiments of this application, a mounting groove is formed on the side of the first plate facing the second plate, which is recessed toward the interior of the first plate. The mounting groove extends along the first direction, and at least a portion of the second plate is received within the mounting groove and fits against the bottom wall of the mounting groove.

[0010] In some embodiments of this application, the second plate includes: a body portion, which is received in the mounting groove and fits against the bottom wall of the mounting groove; and an extension portion, which is disposed on both sides of the body portion along the first direction and is connected to the expansion beam.

[0011] In some embodiments of this application, the extension is formed with a first mounting portion that extends through the thickness direction, and the expansion beam is formed with a second mounting portion that corresponds to the first mounting portion. The first mounting portion and the second mounting portion are connected by fasteners.

[0012] In some embodiments of this application, the second plate further includes a connecting portion, one end of which is connected to the main body portion, and the other end of which is connected to the extension portion, the connecting portion extending obliquely along the first direction.

[0013] In some embodiments of this application, the reinforcing member further includes an insulating member, which covers the outer peripheral wall of the body portion along the first direction and is received within the mounting groove.

[0014] In some embodiments of this application, the first plate is a plastic part and the second plate is a metal part.

[0015] The vehicle of an embodiment of this application is briefly described below.

[0016] The vehicle according to the embodiments of this application is equipped with the battery pack of the above embodiments. Since the vehicle according to the embodiments of this application is equipped with the battery pack of the above embodiments, the battery pack of the vehicle is equipped with a reinforcing member. The reinforcing member can be disposed on the upper surface of the battery cell, and the expansion beam can be disposed on both sides of the battery cell along the first direction. The reinforcing member can extend along the first direction, and the two sides of the reinforcing member along the first direction can be respectively connected to the expansion beam. Therefore, the reinforcing member can limit the battery cell in the height direction while preventing the position and deformation of the expansion beam, so that the battery cell can be housed in the housing, thereby limiting the battery cell, ensuring the safety of the battery cell, improving the reliability of the vehicle, and ensuring the safety of the driver and passengers.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

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

[0019] Figure 1 This is a partial structural schematic diagram of a battery pack according to an embodiment of this application;

[0020] Figure 2 yes Figure 1 A partial structural diagram of the central reinforcing member;

[0021] Figure 3 yes Figure 2 Schematic diagram of the cross section of AA;

[0022] Figure 4 yes Figure 2 A side view diagram.

[0023] Figure label:

[0024] 10. Battery pack; 11. Housing; 12. Battery cell; 13. Expansion beam;

[0025] 14. Reinforcing component; 141. First plate; 1411. Mounting slot;

[0026] 142. Second plate; 1421. Main body; 1422. Extension;

[0027] 1423. Connecting part; 1424. First mounting part; 143. Insulating component. Detailed Implementation

[0028] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0029] The following is for reference. Figures 1-4 The present application describes a battery pack 10 for a vehicle. The battery pack 10 includes a housing 11, battery cells 12, an expansion beam 13, and a reinforcing member 14. An installation cavity is formed in the housing 11, and the battery cells 12 are arranged in the installation cavity. The expansion beam 13 is disposed in the housing 11 and located on both sides of the battery cells 12 along a first direction. The reinforcing member 14 is disposed on the upper surface of the battery cells 12 and extends along the first direction. The two ends of the reinforcing member 14 along the first direction are respectively connected to the expansion beam 13.

[0030] Currently, in order to improve the energy density of battery systems, the arrangement of cells inside the battery pack is shifting from CTM (Cell to Module) technology to CTP (Cell to Pack) technology. In CTP technology, the cells are directly arranged inside the pack and cannot be fixed with bolts. The cells can only be fixed by bottom adhesive technology. There is no effective restraint and fixation on the top and sides of the cells. Under vibration and impact conditions, the battery is prone to failure due to adhesive problems, resulting in loose cells and battery failure. Furthermore, during the charging and discharging process, the cells expand and contract, impacting the expansion beams of the pack. This can easily damage the expansion beams, preventing them from rebounding and causing the cells to fail cyclically. Therefore, how to effectively restrain the cells is a technical problem.

[0031] In response, this application proposes a battery pack 10 for vehicles, which uses a reinforcing member 14 to fix the battery cell 12 and ensure the safety of the battery cell 12.

[0032] like Figure 1 As shown, specifically, the battery pack 10 may include a housing 11, battery cells 12, expansion beams 13, and reinforcing members 14. The housing 11 may have an installation cavity, and the battery cells 12 may be arranged in the installation cavity. The bottom wall of the battery cells 12 may be fixed to the housing 11 by adhesive. The expansion beams 13 may be provided at the housing 11 and may be located on both sides of the battery cells 12 along the first direction. The expansion beams 13 may bear the stress generated by the expansion of the battery cells 12, thereby preventing the battery cells 12 from being deformed or damaged due to compression.

[0033] Furthermore, the reinforcing member 14 can be disposed on the upper surface of the battery cell 12. In some embodiments, the reinforcing member 14 can be bonded to the upper surface of the battery cell 12, thereby making the battery cell 12 and the reinforcing member 14 a single unit, improving the connection strength between the reinforcing member 14 and the battery cell 12. Optionally, the reinforcing member 14 can be bonded and fixed to the battery cell 12 using structural adhesive. The reinforcing member 14 can extend along a first direction, and both ends of the reinforcing member 14 along the first direction can be connected to the expansion beam 13 respectively. Optionally, the reinforcing member 14 and the expansion beam 13 can form a detachable connection by screws or bolts, or the reinforcing member 14 and the expansion beam 13 can form a detachable connection by snap-fit ​​or plug-in, or the reinforcing member 14 and the expansion beam 13 can be directly welded and fixed through the contact surface.

[0034] When the battery cell 12 expands during charging, excessive expansion force can cause the expansion beam 13 to bend and shift. The reinforcing member 14 connects to the expansion beams 13 at both ends of the battery cell 12 to increase the strength of the expansion beams 13, prevent the expansion beams 13 from moving, and fix the battery cell 12 in the mounting cavity. This limits the position of the battery cell 12, improves its safety performance, and also limits the height of the battery cell 12, thus improving its reliability.

[0035] In short, the battery pack 10 of this application embodiment is provided with a reinforcing member 14. The reinforcing member 14 can be disposed on the upper surface of the battery cell 12, and the expansion beam 13 can be disposed on both sides of the battery cell 12 along the first direction. The reinforcing member 14 can extend along the first direction, and both sides of the reinforcing member 14 along the first direction can be connected to the expansion beam 13 respectively. Therefore, the reinforcing member 14 can limit the battery cell 12 in the height direction while preventing the position and deformation of the expansion beam 13, so that the battery cell 12 can be housed in the housing 11, thereby limiting the battery cell 12 and ensuring the safety of the battery cell 12.

[0036] In some embodiments of this application, there can be multiple reinforcing members 14, and the multiple reinforcing members 14 can be spaced apart along the second direction, wherein the second direction can be orthogonal to the first direction. By providing multiple reinforcing members 14, the limiting effect of the battery cell 12 can be further improved, preventing the battery cell 12 from moving along the height direction, improving the structural strength of the expansion beam 13, preventing the expansion beam 13 from deforming and displacing, and more effectively limiting the battery cell 12.

[0037] like Figure 2 and Figure 3As shown, in some embodiments of this application, the reinforcing member 14 may include a first plate 141 and a second plate 142. The first plate 141 may be connected to the upper surface of the battery cell 12. Optionally, the first plate 141 and the battery cell 12 may be fixed by adhesive bonding. In some embodiments, the first plate 141 and the battery cell 12 may be fixed by structural adhesive bonding. The second plate 142 can be disposed on the side of the first plate 141 away from the battery cell 12, and the second plate 142 can be connected to the first plate 141. The two sides of the second plate 142 along the first direction can be connected to the expansion beam 13 respectively, so that the reinforcing member 14 is bonded to the battery cell 12 and connected to the expansion beam 13 at the same time. Further, the first plate 141 can be constructed as a plastic part, and the second plate 142 can be constructed as a metal part. By constructing the first plate 141 as a plastic part, the insulation effect between the first plate 141 and the battery cell 12 can be achieved, ensuring the reliability of the battery cell 12. By constructing the second plate 142 as a metal part, the overall structural strength of the reinforcing member 14 can be improved, ensuring that the reinforcing member 14 can effectively prevent the expansion beam 13 from moving, so that the battery cell 12 can be fixed in the mounting cavity, thereby limiting the position of the battery cell 12 and improving the safety performance of the battery cell 12.

[0038] like Figure 2 and Figure 3 As shown, in some embodiments of this application, a mounting groove 1411 can be formed on the side of the first plate 141 facing the second plate 142. The mounting groove 1411 can be recessed towards the interior of the first plate 141 and can extend along a first direction. At least a portion of the second plate 142 can be accommodated in the mounting groove 1411, and the second plate 142 can fit against the bottom wall of the mounting groove 1411. Specifically, when the second plate 142 moves relative to the first plate 141, the second plate 142 can abut against the first plate 141, thereby restricting the movement of the first plate 141. The first plate 141 is glued to the battery cell 12, therefore, the second plate 142 can restrict the movement of the battery cell 12.

[0039] Furthermore, the reinforcing member 14 may also include an insulating member 143, which may extend along the first direction and may cover the outer peripheral wall of the body portion 1421. The insulating member 143 may be housed in the mounting groove 1411 and may serve as insulation, thereby improving the reliability of the battery cell 12.

[0040] like Figure 4As shown, in some embodiments of this application, the second plate 142 may include a body portion 1421 and an extension portion 1422. The body portion 1421 may be received within a mounting groove 1411, and the body portion 1421 may fit against the bottom wall of the mounting groove 1411. The extension portion 1422 may be disposed on both sides of the body portion 1421 along a first direction. Optionally, the extension portion 1422 and the body portion 1421 may be constructed as an integrally formed part. The extension portion 1422 may also extend along the first direction, and the extension portion 1422 may expand... Optionally, the extension 1422 and the expansion beam 13 can be detachably connected by screws or bolts, or the extension 1422 and the expansion beam 13 can be detachably connected by snap-fit ​​or plug-in, or the extension 1422 and the expansion beam 13 can be directly welded together at the contact surface. By providing the extension 1422, it can be ensured that the main body 1421 can directly bear the displacement or deformation force of the expansion beam 13, avoid damage to the first plate 141 under stress, and improve the structural strength of the reinforcing member 14.

[0041] Furthermore, the second plate 142 may also include a connecting portion 1423, one end of which may be connected to the main body 1421, and the other end of which may be connected to the extension portion 1422. The connecting portion 1423 may extend obliquely along the first direction, and the extension portion 1422 may adjust the height difference between the extension portion 1422 and the expansion beam 13 so that the extension portion 1422 can be connected to the expansion beam 13 more effectively.

[0042] like Figure 2 As shown, in some embodiments of this application, the extension 1422 may have a first mounting portion 1424 that extends through the thickness direction, and the expansion beam 13 may have a second mounting portion that corresponds to the first mounting portion 1424. In a specific embodiment, the first mounting portion 1424 and the second mounting portion may be configured as mounting holes. The first mounting portion 1424 and the second mounting portion may be fixed by fasteners. Specifically, the fasteners may be sequentially inserted into the first mounting portion 1424 and the second mounting portion and threadedly connected to the second mounting portion, thereby connecting the extension 1422 to the expansion beam 13.

[0043] Furthermore, there can be multiple first mounting portions 1424, which can be spaced out on the extension portion 1422. Similarly, there can be multiple second mounting portions, which can be arranged one-to-one with the multiple first mounting portions 1424. By providing multiple first mounting portions 1424 and multiple second mounting portions, the fit strength between the extension portion 1422 and the expansion beam 13 can be further improved, so that the reinforcing member 14 can effectively prevent the expansion beam 13 from moving or deforming, so that the battery cell 12 can be fixed in the mounting cavity, thereby limiting the position of the battery cell 12 and improving the safety performance of the battery cell 12.

[0044] The vehicle of an embodiment of this application is briefly described below.

[0045] The vehicle according to the embodiments of this application is equipped with the battery pack 10 of the above embodiments. Since the vehicle according to the embodiments of this application is equipped with the battery pack 10 of the above embodiments, the battery pack 10 of the vehicle is provided with a reinforcing member 14. The reinforcing member 14 can be disposed on the upper surface of the battery cell 12. The expansion beam 13 can be disposed on both sides of the battery cell 12 along the first direction. The reinforcing member 14 can extend along the first direction, and the two sides of the reinforcing member 14 along the first direction can be respectively connected to the expansion beam 13. Therefore, the reinforcing member 14 can limit the battery cell 12 in the height direction while preventing the position and deformation of the expansion beam 13, so that the battery cell 12 can be housed in the housing 11, thereby limiting the battery cell 12, ensuring the safety of the battery cell 12, improving the reliability of the vehicle, and ensuring the safety of the driver and passengers.

[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0047] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0048] In the description of this application, "multiple" means two or more.

[0049] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0050] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do 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 one or more embodiments or examples.

[0052] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack for a vehicle, characterized in that, include: A housing having an installation cavity formed within it; Battery cells, which are arranged within the mounting cavity; An expansion beam is disposed on the housing and located on both sides of the battery cell along a first direction; A reinforcing member is disposed on the upper surface of the battery cell and extends along the first direction, and the two ends of the reinforcing member along the first direction are respectively connected to the expansion beam.

2. The battery pack for a vehicle according to claim 1, characterized in that, There are multiple reinforcing members, which are arranged at intervals along a second direction, which is orthogonal to the first direction.

3. The battery pack for a vehicle according to claim 1, characterized in that, The reinforcing member includes: A first plate is connected to the upper surface of the battery cell; The second plate is disposed on the side of the first plate away from the battery cell and connected to the first plate. The second plate is connected to the expansion beam on both sides along the first direction.

4. The battery pack for a vehicle according to claim 3, characterized in that, The first plate has a mounting groove recessed into the interior of the first plate on the side facing the second plate. The mounting groove extends along the first direction, and at least a portion of the second plate is received within the mounting groove and is in contact with the bottom wall of the mounting groove.

5. The battery pack for a vehicle according to claim 4, characterized in that, The second plate includes: The main body is housed within the mounting groove and fits against the bottom wall of the mounting groove. An extension portion is provided on both sides of the main body portion along the first direction, and the extension portion is connected to the expansion beam.

6. The battery pack for a vehicle according to claim 5, characterized in that, The extension has a first mounting portion that extends through the thickness direction, and the expansion beam has a second mounting portion that corresponds to the first mounting portion. The first mounting portion and the second mounting portion are connected by fasteners.

7. The battery pack for a vehicle according to claim 5, characterized in that, The second plate also includes: The connecting portion has one end connected to the main body and the other end connected to the extension portion, and the connecting portion extends obliquely along the first direction.

8. The battery pack for a vehicle according to claim 5, characterized in that, The reinforcing member also includes: An insulating element is provided, which covers the outer peripheral wall of the body portion along the first direction and is housed within the mounting groove.

9. The battery pack for a vehicle according to claim 5, characterized in that, The first plate is made of plastic, and the second plate is made of metal.

10. A vehicle, characterized in that, Includes a battery pack for a vehicle as described in any one of claims 1-9.

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