Battery case, battery and vehicle

Abstract

The battery shell comprises a tray and a cover body, a beam body is arranged in the tray, the cover body is plugged at an opening of the tray, one of the cover body and the beam body is provided with a concave part, the other one of the cover body and the beam body is provided with a convex part, the convex part is matched in the concave part, and the cover body is arranged in the concave part. And at least partial joint surfaces of the convex part and the concave part are bonded and fixed. The connection strength of the cover body and the tray of the battery shell is high, the force transmission effect is good, the overall shear strength is high, the vibration mode is good, and the overall sealing performance is also ensured.

Description

Technical Field

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

[0002] In recent years, with the rapid development of new energy vehicles, the power battery industry, as the power source of new energy vehicles, has also developed rapidly. During power battery assembly, the individual cells must first be stacked on a pallet, and then the top cover must be fixed to the pallet to complete the battery packaging.

[0003] However, the assembly of the upper cover and the tray in the existing technology is only applicable to the case where the tray is fully stacked with single cells. For some small power situations or when longitudinal beams are provided in the tray structure, the existing assembly method has problems such as insufficient bonding strength and easy vibration failure, poor force transmission effect and low shear strength between the upper cover and the longitudinal beam, and the need to open holes, which can easily cause sealing failure. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides a battery case, in which the connection strength between the cover and the tray is high, the force transmission effect is good, and the overall shear strength is high and the vibration mode is good.

[0006] An embodiment of the present invention further provides a battery comprising the above-mentioned battery shell.

[0007] An embodiment of the present invention also provides a vehicle comprising the battery.

[0008] The battery case of the embodiment of the utility model comprises:

[0009] A pallet, wherein a beam body is provided in the pallet;

[0010] The cover body is sealed at the opening of the tray. One of the cover body and the beam body is provided with a recessed portion, and the other is provided with a convex portion, and the convex portion is matched in the recessed portion.

[0011] In some embodiments, at least part of the joining surfaces of the convex portion and the concave portion are bonded and fixed.

[0012] In some embodiments, the convex portion is provided on the cover body, the concave portion is provided on the surface of the beam body facing the cover body, and both the convex portion and the concave portion extend along a first direction parallel to the extension direction of the beam body.

[0013] In some embodiments, the protrusion is integrally formed on the cover, and the protrusion protrudes toward a side of the cover facing the tray and forms a groove on the other side of the cover.

[0014] In some embodiments,

[0015] In some embodiments, the first direction is the length direction of the tray;

[0016] The beam body is located in the middle of the tray in a second direction, and the second direction is perpendicular to the first direction.

[0017] In some embodiments, the concave portion, the convex portion, and the beam body have symmetrical cross-sections in a second direction, and the second direction is perpendicular to the first direction;

[0018] The symmetry axis of the cross section of the concave portion coincides with the symmetry axis of the cross section of the convex portion, and / or the symmetry axis of the cross section of the concave portion coincides with the symmetry axis of the cross section of the beam body;

[0019] And / or, the cross section of the convex portion is in the shape of an X, and the cross section of the concave portion is in the shape of a rectangular groove.

[0020] In some embodiments, a first adhesive member is provided between the cover and the tray, the first adhesive member extends along the open edge of the tray and closes into a circle, and at least part of the first adhesive member is multi-layered in the inner and outer directions of the tray.

[0021] In some embodiments, the convex portion and the concave portion are bonded together by a second bonding member, and the first bonding member and the second bonding member are made of different materials;

[0022] And / or, the cover and the tray are connected via a plurality of fasteners.

[0023] The battery of the embodiment of the present invention includes the battery shell as described in any of the above embodiments.

[0024] The vehicle according to the embodiment of the present invention includes the battery as described in any of the above embodiments.

[0025] Beneficial effects: The battery case, battery and vehicle of the embodiments of the present invention have high connection strength between the cover and the tray of the battery case, good force transmission effect, high overall shear strength and good vibration mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the battery case of an embodiment of the present utility model.

[0027] Figure 2 yes Figure 1Schematic cross-sectional view of the AA portion of the middle battery case.

[0028] Figure 3 yes Figure 2 A local enlarged schematic diagram of point A in the middle.

[0029] Figure 4 Schematic diagram of a cover body according to an embodiment of the present invention.

[0030] Figure 5 yes Figure 4 Cross-sectional view and partial enlarged schematic diagram at the middle BB.

[0031] Figure 6 Schematic diagram of a tray according to an embodiment of the present invention.

[0032] Figure 7 yes Figure 6 Cross-sectional view and partial enlarged schematic diagram at CC in the middle.

[0033] Figure 8 It is a schematic diagram of an explosion of a battery case according to an embodiment of the present invention.

[0034] Reference numerals:

[0035] 1-tray; 11-beam; 111-recess;

[0036] 2-Cover; 21-Protrusion;

[0037] 3- second bonding member;

[0038] 4-First bonding member. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0040] like Figure 1 As shown, the battery case of the embodiment of the present invention includes a tray 1 and a cover 2.

[0041] The tray 1 can be a square box structure with an open top. When in use, a battery module consisting of a plurality of stacked single batteries can be placed into the tray 1 from the open top. The tray 1 is provided with a beam 11, for example, Figure 2 As shown, the beam 11 can be an aluminum extrusion profile and is generally in the shape of a long strip. The beam 11 can be assembled in the pallet 1 by welding, integral molding, fastening with fasteners, etc. The arrangement of the beam 11 can support and strengthen the structural strength of the pallet 1.

[0042] The cover 2 blocks the opening of the tray 1 . One of the cover 2 and the beam 11 is provided with a recess 111 , and the other is provided with a protrusion 21 . The protrusion 21 fits in the recess 111 .

[0043] For example, Figure 1 and Figure 2 As shown, the shape of the cover 2 can be adapted to the shape of the opening above the tray 1. The cover 2 can be a rectangular plate. When the battery module is placed in the tray 1, the cover 2 can be fixed to the top side of the tray 1 by fasteners, etc., so that the top opening of the tray 1 can be sealed.

[0044] like Figure 3 As shown, the recess 111 can be provided on the beam body 11 , and the protrusion 21 can be provided on the cover body 2 . When the cover body 2 is sealed at the opening of the tray 1 , the protrusion 21 can be correspondingly inserted into the recess 111 .

[0045] In some other embodiments, the protrusion 21 can also be provided on the beam body 11, and the recess 111 can also be provided on the cover body 2. In some other embodiments, part of the protrusion 21 can be provided on the beam body 11, and the other part of the protrusion 21 can be provided on the cover body 2. Correspondingly, part of the recess 111 can be provided on the beam body 11, and the other part of the recess 111 can be provided on the cover body 2.

[0046] The battery shell of the embodiment of the present invention has a matching design of adding a protrusion 21 and a recess 111 between the cover body 2 and the beam body 11 of the tray 1. The protrusion 21 and the recess 111 can increase the overall bonding area, thereby fully ensuring the bonding strength between the cover body 2 and the beam body 11, and avoiding the situation where the bonding point between the cover body 2 and the beam body 11 is easily cracked and causes connection failure due to vibration, etc.

[0047] Secondly, the cooperation between the protrusion 21 and the recess 111 can also improve the force transmission effect between the cover 2 and the tray 1, thereby also enhancing the overall shear strength of the battery shell and providing an overall vibration mode effect.

[0048] In some embodiments, at least part of the joint surfaces of the convex portion 21 and the concave portion 111 are bonded together. For example, the entire joint surfaces of the convex portion 21 and the concave portion 111 can be bonded together by a second bonding member 3 described later. The second bonding member 3 can be a viscous adhesive or the like.

[0049] Since the convex portion 21 and the concave portion 111 are plugged in and bonded by an adhesive, the need to drill holes in the beam body 11 in the prior art is avoided. This non-porous design can fully ensure the overall sealing, thereby avoiding the situation where drilling holes easily lead to sealing failure, thereby ensuring the safety of battery use.

[0050] In some embodiments, the convex portion 21 is provided on the cover 2 , and the concave portion 111 is provided on the surface of the beam 11 facing the cover 2 , and both the convex portion 21 and the concave portion 111 extend along a first direction parallel to the extension direction of the beam 11 .

[0051] For example, Figure 4 and Figure 5 As shown, the protrusion 21 can be integrally formed on the bottom side of the cover 2, as shown in FIG. Figure 6 and Figure 7 As shown, the recess 111 can be provided on the top surface of the beam body 11 , and the shape of the recess 111 matches the shape of the protrusion 21 .

[0052] like Figure 4 As shown, the protrusion 21 can be provided in the middle of the cover 2, and the protrusion 21 can extend along a first direction, which can be the length direction of the tray 1. Figure 6 As shown, the recess 111 can be provided in the middle of the pallet 1, and the recess 111 can also extend along the first direction. Thus, the design of the protrusion 21 and the recess 111 satisfies the need for the beam body 11 to be used as a longitudinal beam of the pallet 1, thereby satisfying the function of improving the structural strength of the pallet 1 in its longitudinal direction.

[0053] In some other embodiments, the beam body 11 may also be a cross beam in the tray 1 , that is, the beam body 11 may extend along the second direction.

[0054] In some embodiments, the protrusion 21 is integrally formed on the cover 2 , and the protrusion 21 protrudes toward a side of the cover 2 facing the tray 1 and forms a groove on the other side of the cover 2 .

[0055] For example, Figure 5 As shown, the protrusion 21 can be integrally formed on the bottom side of the cover 2 by stamping. During processing, a portion of the cover 2 can be punched downward by the punch, while a groove corresponding to the protrusion 21 can be formed on the upper side of the cover 2. The groove can be a long groove with a rectangular cross section. This can simplify the processing process and improve processing efficiency.

[0056] In some other embodiments, the protrusion 21 may also be fixed to the bottom side of the cover body 2 by integral casting, welding, or the like.

[0057] In some embodiments, the beam 11 is located in the middle of the tray 1 in the second direction, and the second direction is perpendicular to the first direction. Figure 6As shown, the first direction may be the length direction of the pallet 1, and the second direction may be the width direction of the pallet 1. The beam 11 may extend along the length direction of the pallet 1, and in the width direction of the pallet 1, the beam 11 is located in the middle of the pallet 1. This ensures the symmetry of the structure of the pallet 1, which helps to ensure the consistency of the torsion and shear resistance of the pallet 1 on both sides in the width direction.

[0058] In some embodiments, the cross-sections of the concave portion 111, the convex portion 21 and the beam body 11 in the second direction are all symmetrical structures, for example, Figure 5 As shown, the cross section of the recess 111 may be in the shape of a cross, such as Figure 7 As shown, the cross-sections of the protrusion 21 and the beam body 11 may both be rectangular, and the second direction is perpendicular to the first direction. The second direction may specifically be the width direction of the pallet 1 .

[0059] The axis of symmetry of the cross section of the recessed portion 111 coincides with the axis of symmetry of the cross section of the protruding portion 21. For example, the axis of symmetry of the cross section of the recessed portion 111 and the axis of symmetry of the cross section of the protruding portion 21 may both extend along a third direction, which may be the height direction of the battery case, specifically, the vertical direction. After the recessed portion 111 and the protruding portion 21 are plugged and assembled, the axis of symmetry of the cross section of the recessed portion 111 and the axis of symmetry of the cross section of the protruding portion 21 may lie on the same straight line, thereby ensuring the structural symmetry and balance of the protruding portion 21 and the recessed portion 111 when assembled along the second direction.

[0060] In some embodiments, the symmetry axis of the cross section of the recess 111 coincides with the symmetry axis of the cross section of the beam body 11. Figure 7 As shown, the symmetry axis of the cross section of the recess 111 and the symmetry axis of the cross section of the protrusion 21 can both extend along the third direction (up and down direction), wherein the recess 111 can be located in the middle position of the top side of the beam body 11, and the symmetry axis of the recess 111 and the symmetry axis of the beam body 11 can be located in the same straight line, thereby ensuring the symmetry of the overall structure of the beam body 11, and further ensuring the structural symmetry of the battery shell in the second direction.

[0061] In some embodiments, as Figure 5 As shown, the cross section of the protrusion 21 is in the shape of a cross. Figure 7 As shown, the cross section of the concave portion 111 is a rectangular groove. Thus, the structure of the convex portion 21 and the concave portion 111 is simple, thereby avoiding the situation where the style is complicated and the processing difficulty is increased.

[0062] In some embodiments, a first adhesive member 4 is provided between the lid 2 and the tray 1 , and the first adhesive member 4 extends along the open edge of the tray 1 and closes into a circle, and at least part of the first adhesive member 4 is multi-layered in the inner and outer directions of the tray 1 .

[0063] For example, Figure 8As shown, first adhesive member 4 can be generally square and ring-shaped and can be positioned between the top surface of tray 1 and the bottom surface of lid 2. First adhesive member 4 can also surround the outer periphery of the opening of tray 1. During assembly, first adhesive member 4 can bond lid 2 and tray 1 together, thereby ensuring both the connection strength and the waterproof seal between lid 2 and tray 1.

[0064] like Figure 8 As shown, along the circumferential extension direction of the first adhesive member 4, the first adhesive member 4 can have two layers, and the two layers of first adhesive members 4 can be arranged in the inner and outer directions of the pallet 1, thereby further improving the bonding effect and ensuring waterproof sealing.

[0065] In some embodiments, the convex portion 21 and the concave portion 111 are bonded together by a second adhesive member 3, and the first adhesive member 4 and the second adhesive member 3 are made of different materials. For example, the first adhesive member 4 may be a sealant, and the second adhesive member 3 may be a structural adhesive. The structural adhesive can provide reinforcement, bonding, and repair, while the sealant can provide filling and bonding. By using different adhesives in different locations, the advantages of each adhesive can be fully utilized.

[0066] In some embodiments, the lid 2 and the tray 1 are connected by multiple fasteners. For example, after the lid 2 and the tray 1 are bonded together by the first adhesive 4, the lid 2 and the tray 1 can be further connected and fixed by adding multiple fasteners such as bolts, thereby fully ensuring the structural strength and stability of the connection between the two.

[0067] The battery of the embodiment of the present utility model is described below.

[0068] The battery of the present invention includes a battery case, which may be any of the battery cases described in the above embodiments. The battery also includes a battery module, which is composed of a plurality of stacked cells. The battery module is mounted within the battery case, and the battery module and the cover 2 may be bonded together using an adhesive or the like.

[0069] The following describes a vehicle according to an embodiment of the present invention.

[0070] The vehicle of the embodiment of the present invention includes a battery, which can be a battery as described in any of the above embodiments. The vehicle can be a car, SUV, bus or other vehicle that requires a battery.

[0071] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. A battery shell, characterized in that: include: A pallet, wherein a beam body is provided in the pallet; The cover body is sealed at the opening of the tray. One of the cover body and the beam body is provided with a recessed portion, and the other is provided with a convex portion, and the convex portion is matched in the recessed portion.

2. The battery case according to claim 1, wherein At least part of the joining surfaces of the convex portion and the concave portion are bonded and fixed.

3. The battery case according to claim 1, wherein: The convex portion is provided on the cover body, and the concave portion is provided on a surface of the beam body facing the cover body. Both the convex portion and the concave portion extend along a first direction parallel to an extending direction of the beam body.

4. The battery case according to claim 2, wherein: The convex portion is integrally formed on the cover body, and the convex portion protrudes toward one side of the cover body facing the tray and forms a groove on the other side of the cover body.

5. The battery case according to claim 3, wherein: The first direction is the length direction of the tray; And / or, the beam is located in the middle of the tray in a second direction, and the second direction is perpendicular to the first direction.

6. The battery case according to claim 3, wherein: The cross-sections of the concave portion, the convex portion, and the beam body in a second direction are all symmetrical structures, and the second direction is perpendicular to the first direction; The symmetry axis of the cross section of the concave portion coincides with the symmetry axis of the cross section of the convex portion, and / or the symmetry axis of the cross section of the concave portion coincides with the symmetry axis of the cross section of the beam body; And / or, the cross section of the convex portion is in the shape of an X, and the cross section of the concave portion is in the shape of a rectangular groove.

7. The battery case according to any one of claims 1 to 6, characterized in that A first adhesive member is provided between the cover and the tray. The first adhesive member extends along the open edge of the tray and is closed into a circle. At least a portion of the first adhesive member is multi-layered in the inner and outer directions of the tray.

8. The battery case according to claim 7, wherein: The convex portion and the concave portion are bonded together by a second bonding member, and the first bonding member and the second bonding member are made of different materials; And / or, the cover and the tray are connected via a plurality of fasteners.

9. A battery, characterized in that: The battery case comprises the battery case according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the battery as claimed in claim 9 above.

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