Battery pack frame, power battery pack with same and vehicle

Abstract

The utility model relates to the technical field of vehicle batteries, and particularly discloses a battery pack frame, a power battery pack with the same and a vehicle. The battery pack frame comprises a bottom plate and edge beams, and insertion cavities are formed in the two side edges of the bottom plate in the first direction; the number of the edge beams is two, the two edge beams are distributed in the second direction and connected to the edges of the two sides of the bottom plate in the first direction respectively, the corners of the edge beams are connected with inserting pieces, and the inserting pieces are inserted into the inserting cavities in a sealed mode. Wherein the first direction intersects with the second direction. According to the battery pack frame, the edge beams are inserted into the insertion cavities of the bottom plate through the insertion pieces, the connection strength of the edge beams and the insertion cavities is improved, the lateral impact resistance of the battery pack frame is enhanced, the structural strength of the battery pack frame is enhanced, the battery pack frame is not prone to deformation, and battery short circuit caused by cooling water leakage is avoided; in addition, the plug connector is in sealed connection with the plug cavity, so that the dustproof and waterproof effects are achieved, and dust or water vapor is prevented from being accumulated in the plug cavity to affect the connection service life.

Description

Technical Field

[0001] This application relates to the technical field of vehicle batteries, and specifically discloses a battery pack frame, a power battery pack having the same, and a vehicle. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] In related technologies, some vehicles use a cooling solution with large water-cooled plates on both sides of the battery cells, which greatly improves the heat dissipation area and integration efficiency. However, the battery pack frame of this type of power battery is mostly not strong enough on its own, relying solely on the protection of the vehicle body. When the vehicle is subjected to a lateral impact, the battery pack frame is prone to deformation, causing coolant leakage, which can lead to battery short circuits and insulation failure. Utility Model Content

[0004] The purpose of this application is to solve at least some of the technical problems mentioned above, and this purpose is achieved through the following technical solutions:

[0005] In a first aspect, this application provides a battery pack frame, including a base plate and side beams. The base plate has two side edges in a first direction with insertion cavities; there are two side beams, both distributed along a second direction and respectively connected to the two sides of the base plate in the first direction, with insertion members connected at the corners of the side beams, the insertion members being sealed and inserted into the insertion cavities; wherein the first direction intersects the second direction.

[0006] In this application, the side beam is connected to the insertion cavity of the base plate through a connector, which increases the connection strength between the two, strengthens the battery pack frame's ability to resist lateral impact, enhances the structural strength of the battery pack frame itself, makes it less prone to deformation, and avoids short circuits caused by cooling water leakage. In addition, the connector and the insertion cavity are sealed together, which has the effect of dustproof and waterproof, and prevents the accumulation of dust or water vapor in the insertion cavity, which would affect the connection life.

[0007] In some embodiments, the thickness of the base plate is δ and the insertion depth of the connector is D, then 3≤D / δ≤4.

[0008] In some embodiments, the insertion cavity includes a plurality of unit slots arranged separately along a second direction, and the insertion member includes a plurality of insertion teeth spaced apart along the second direction, the plurality of insertion teeth being respectively inserted into the plurality of unit slots; or, the insertion cavity is an integral slot communicating along the second direction, and the insertion member is an insertion plate that matches the integral slot, the insertion plate being inserted into the integral slot.

[0009] In some embodiments, a sealant is applied between the connector and the inner wall of the connector cavity; and / or, the connector is welded to the opening of the connector cavity to form a sealing weld.

[0010] In some embodiments, the battery pack frame further includes cross beams and reinforcing members. The cross beams are distributed on the plate surface of the bottom plate along a first direction, and both ends thereof are respectively connected to two side beams. Flow collector tube avoidance grooves are respectively formed at both ends of the cross beam in the first direction; the reinforcing member includes a cover plate and a support portion connected to the cover plate and protruding toward the flow collector tube avoidance groove. The cover plate covers the opening of the flow collector tube avoidance groove, and the support portion abuts against both inner walls of the flow collector tube avoidance groove in the first direction.

[0011] In some embodiments, a weight reduction cavity is formed in the support portion, and reinforcing ribs distributed along the first direction are arranged in the weight reduction cavity.

[0012] In some embodiments, concave surfaces are provided at both ends of the cross beam in the first direction, and base protrusion portions are respectively provided on the two side beams. The base protrusion portions are fitted with the concave surfaces.

[0013] In some embodiments, the cross beam has a cavity inside, and the part of the cavity profile corresponding to the base protrusion portion is arranged in a "field" shape.

[0014] In a second aspect, the present application further provides a power battery pack, which includes battery cells and the battery pack frame of the first aspect, and the battery cells are installed inside the battery pack frame.

[0015] In a third aspect, the present application further provides a vehicle, which includes a vehicle body and the power battery pack of the second aspect, and the power battery pack is installed on the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0017] Figure 1 is a schematic diagram of the overall structure of the battery pack frame according to an embodiment of the present application;

[0018] Figure 2 is Figure 1 an enlarged schematic diagram of part A in;

[0019] Figure 3 is a schematic diagram of the structure of the cross beam according to an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of the structure of the side beam according to an embodiment of the present application;

[0021] Figure 5 is a schematic diagram of the structure of the bottom plate according to an embodiment of the present application;

[0022] Figure 6 is Figure 5 Enlarged schematic view at position B in the middle;

[0023] Figure 7 Schematic connection diagram of the side beam and the bottom plate of an embodiment of the present application;

[0024] Figure 8 Schematic structural diagram of the crossbeam cavity of an embodiment of the present application;

[0025] Figure 9 Schematic structural diagram of the reinforcing member of an embodiment of the present application.

[0026] Among them, the reference numerals are explained as follows:

[0027] 100, battery pack frame; 110, frame assembly; 111, bottom plate; 1111, insertion cavity; 112, side beam; 1121, base convex part; 1122, insert; 120, crossbeam; 121, concave surface; 122, "field" - shaped cavity; 123, current collector pipe avoidance groove; 130, reinforcing member; 131, support part; 132, cover plate; 133, weight - reducing cavity; 134, reinforcing rib; a, seal weld; X, first direction; Y, second direction. Specific embodiments

[0028] The following will describe the exemplary embodiments of the present disclosure in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0029] It should be understood that the terms used herein are only for the purpose of describing specific exemplary embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", and "having" are inclusive and thus specify the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or their combinations.

[0030] Although terms such as "first," "second," etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Furthermore, in the description of this application, unless otherwise expressly specified and limited, the terms "set up" and "connected" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a direct connection or an indirect connection via an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "center," "inner," "top," "circumferential," "side," "bottom," etc. Such spatial relative terms are intended to include different orientations of the mechanism in use or operation, in addition to those depicted in the figure. For example, if the mechanism in the figure is flipped, then an element described as "below other elements or features" or "under other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The mechanism may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0032] To aid in understanding this application, the technical issues are further explained as follows:

[0033] In related technologies, some vehicles use a cooling solution with large water-cooled plates on both sides of the battery cells, which greatly improves the heat dissipation area and integration efficiency. However, the battery pack frame of this type of power battery is mostly not strong enough on its own, relying solely on the protection of the vehicle body. When the vehicle is subjected to a lateral impact, the battery pack frame is prone to deformation, causing coolant leakage, which can lead to battery short circuits and insulation failure.

[0034] Specifically, the large water-cooled plate requires a manifold to be connected and run through its side. This necessitates creating a notch in the battery pack's crossbeam to accommodate the manifold, resulting in a loss of strength and reduced resistance to side impacts from the vehicle, thus offering poor protection for the internal battery cells. Furthermore, if a side impact occurs, the crossbeam's fractured section can easily shear the manifold during deformation, causing coolant leakage, leading to a battery short circuit and insulation failure.

[0035] The specific embodiments of the battery pack frame are described in detail below with reference to the accompanying drawings.

[0036] Firstly, referring to Figure 1 and Figures 4 to 7 This application provides a battery pack frame 100, including a base plate 111 and side beams 112. The base plate 111 has insertion cavities 1111 on two sides in a first direction X. Two side beams 112 are provided, each distributed along a second direction Y, and connected to the two sides of the base plate 111 in the first direction X. Insertion members 1122 are connected to the corners of the side beams 112, and the insertion members 1122 are sealed and inserted into the insertion cavities 1111. The first direction X intersects the second direction Y. Preferably, the first direction X is perpendicular to the second direction Y.

[0037] In this application, the side beam 112 is connected to the insertion cavity 1111 of the base plate 111 via the plug-in connector 1122, which increases the connection strength between the two, strengthens the ability of the battery pack frame 100 to resist lateral impact, enhances the structural strength of the battery pack frame 100 itself, makes it less prone to deformation, and avoids short circuits caused by cooling water leakage; in addition, the plug-in connector 1122 and the insertion cavity 1111 are sealed together, which has the effect of dustproof and waterproof, and prevents the accumulation of dust or water vapor in the insertion cavity 1111, which would affect the connection life.

[0038] In some embodiments, refer to Figure 1 and Figures 3 to 6 If the thickness of the base plate 111 is δ and the insertion depth of the connector 1122 is D, then 3 ≤ D / δ ≤ 4. In some embodiments, the connector cavity 1111 includes a plurality of unit slots arranged separately along the second direction Y, and the connector 1122 includes a plurality of insertion teeth spaced apart along the second direction Y, the plurality of insertion teeth being respectively inserted into the plurality of unit slots; or, the connector cavity 1111 is an integral slot communicating along the second direction Y, and the connector 1122 is an insertion plate that matches the integral slot, the insertion plate being inserted into the integral slot. In some embodiments, a sealant is applied between the connector 1122 and the inner wall of the connector cavity 1111; and / or, the connector 1122 is welded to the opening of the connector cavity 1111 to form a sealing weld a.

[0039] In the above embodiment, the insertion depth of the connector 1122 is 3 to 4 times the thickness of the base plate 111. The base plate 111 and the side beam 112 are connected to the connector cavity 1111 via the connector 1122, and the large insertion depth increases the connection strength between the two, thereby increasing the impact resistance of the side beam 112. In addition, the connector 1122 should not be too long to avoid increasing material costs and weight. Specifically, the two side beams 112 are respectively inserted into both sides of the base plate 111, and the connector cavities 1111 on both sides of the base plate 111 are connected to reduce weight. More specifically, the thickness of the base plate 111 is approximately 10 mm, and the height of the connector cavity 1111 is 6 mm to 8 mm.

[0040] Specifically, when multiple insertion teeth are respectively inserted into multiple unit slots, or a whole insertion plate is directly inserted into the integral slot, the function of strengthening the connection between the side beam 112 and the bottom plate 111 can be achieved, and both are within the protection scope of this application. It should be noted that Figures 4 to 6 FIG. is a schematic structural diagram of the unit slot and the insertion teeth. The structure of the integral slot and the insertion plate is not shown in the drawings, but the structures of the two can be clearly represented according to the text part. In this application, "and / or" means that either the structure before "and / or" or the structure after "and / or" is set alternatively or simultaneously. Specifically, the opening of the plug-in member 1122 and the plug-in cavity 1111 can be friction stir welded.

[0041] In some embodiments, referring to Figures 1 to 3 and Figure 8 and Figure 9 , the battery pack frame 100 further includes a cross beam 120 and a reinforcing member 130. The cross beam 120 is distributed on the plate surface of the bottom plate 111 along the first direction X, and its two ends are respectively connected to the two side beams 112. Flow collector avoidance grooves 123 are respectively formed at the two ends of the cross beam 120 in the first direction X; the reinforcing member 130 includes a cover plate 132 and a support portion 131 connected to the cover plate 132 and protruding toward the flow collector avoidance groove 123. The cover plate 132 covers the opening of the flow collector avoidance groove 123, and the support portion 131 abuts against the inner walls on both sides of the flow collector avoidance groove 123 in the first direction X. In some embodiments, a weight reduction cavity 133 is formed in the support portion 131, and a reinforcing rib 134 distributed along the first direction X is provided in the weight reduction cavity 133. In some embodiments, concave surfaces 121 are provided at the two ends of the cross beam 120 in the first direction X, and base protrusion portions 1121 are respectively provided on the two side beams 112, and the base protrusion portions 1121 are fitted with the concave surfaces 121. In some embodiments, the cross beam 120 has a cavity inside, and the part of the cavity section corresponding to the base protrusion portion 1121 is arranged in a "field 122" shape.

[0042] In this application, the battery pack frame 100 is provided with a reinforcing member 130. The reinforcing member 130 and the flow collector avoidance groove 123 form a flow collector passing space for the flow collector to pass through; the reinforcing member 130 is provided with a support portion 131 to support the flow collector avoidance groove 123; when a vehicle side impact occurs and thus squeezes the side of the battery pack frame 100, the reinforcing member 130 and the support portion 131 thereon can reduce the deformation degree of the flow collector avoidance groove 123, so as to protect the flow collector located in the flow collector avoidance groove 123 and avoid battery short circuit caused by the leakage of cooling water due to the rupture of the flow collector.

[0043] Specifically, the bottom plate 111 and the side beams 112 form the frame assembly 110; the interior of the frame assembly 110 is the battery cell accommodation space, and the cross beams 120 are distributed in the battery cell accommodation space in the left-right direction. There are multiple cross beams 120, and the multiple cross beams 120 are arranged at intervals in the front-back direction and divide the battery cell accommodation space into multiple battery cell single installation cavities. Both ends of each cross beam 120 have current collector tube avoidance grooves 123 with upward openings, and each current collector tube avoidance groove 123 is provided with a reinforcing member 130. On the left and right sides of the frame assembly 110, there is respectively a current collector tube distributed in the front-back direction, and the current collector tube passes through the current collector tube avoidance grooves 123 of the multiple cross beams 120.

[0044] In this embodiment, there are two side beams 112, and the two side beams 112 are distributed in the front-back direction and are respectively arranged on the left and right sides of the bottom plate 111. The cross beam 120 is fixed to the top surface of the bottom plate 111 in the left-right direction, and the left and right ends of the cross beam 120 are respectively connected to the two side beams 112. Further, a base protrusion 1121 is provided at the bottom of the side beam 112 to increase the structural strength. The upper side of the end of the cross beam 120 is a flat surface and abuts against the upper side of the side beam 112; the lower side of the end of the cross beam 120 is an inner concave surface 121. Specifically, the inner concave surface 121 is a curved surface, and the inner concave surface 121 abuts against the base protrusion 1121, increasing the contact area and dispersing the force, so as to reduce the deformation of the cross beam 120 when the battery pack frame 100 is subjected to a lateral collision.

[0045] Further, referring to Figure 8 , the upper side of the cavity is a "Lv" - shaped cavity, and the lower side is a "Tian 122" - shaped cavity, and there are vertical and horizontal cross - partition plates inside, which can play a role in weight reduction while also enhancing the resistance to impact. In some embodiments, referring to Figure 9 , the reinforcing member 130 is further provided with a cover plate 132, the cover plate 132 covers the opening of the current collector tube avoidance groove 123, and both ends of the cover plate 132 are connected to the cross beam 120; a support portion 131 is provided on one side surface of the cover plate 132, and a weight - reducing cavity 133 is provided inside the support portion 131. In this embodiment, the cover plate 132 and the support portion 131 are welded or integrally formed. The support portion 131 is located at the opening of the current collector tube avoidance groove 123, and the weight - reducing cavity 133 is opened in the support portion 131 for weight reduction. The cover plate 132 is fixed to the cross beam 120 by fasteners such as bolts or rivets, or the cover plate 132 is welded to the cross beam 120.

[0046] In a second aspect, the present application further provides a power battery pack, which includes battery cells and the battery pack frame 100 of the first aspect, and the battery cells are installed inside the battery pack frame 100.

[0047] In a third aspect, the present application further provides a vehicle, which includes a vehicle body and the power battery pack of the second aspect, and the power battery pack is installed on the vehicle body.

[0048] In the above embodiments, the power battery pack of the second aspect and the vehicle of the third aspect include the battery pack frame 100 of the first aspect. Therefore, the power battery pack of the second aspect and the vehicle of the third aspect have at least all the technical effects of the battery pack frame 100 of the first aspect. The specific technical effects are described above and will not be repeated here.

[0049] The embodiments of this application only illustrate the structures in the power battery pack and vehicle related to the improvements of this application, and do not mean that the power battery pack and vehicle of this application do not have other structures. For example, the power battery pack also has a battery cooling system, the vehicle also has a power battery pack charge and discharge protection system, etc. Other structures will not be described one by one here.

[0050] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery pack frame, characterized in that, Comprising: A bottom plate, with insertion cavities provided on two side edges in the first direction; Side beams, there are two side beams, both of the two side beams are distributed along the second direction and are respectively connected to the two side edges of the bottom plate in the first direction. An insertion part is connected at the corner of the side beam, and the insertion part is hermetically inserted into the insertion cavity; Wherein, the first direction intersects with the second direction.

2. The battery pack frame according to claim 1, characterized in that, The thickness of the bottom plate is δ, and the insertion depth of the insertion part is D, then 3 ≤ D / δ ≤ 4.

3. The battery pack frame according to claim 1, characterized in that, The insertion cavity includes a plurality of unit slots arranged separately along the second direction, and the insertion part includes a plurality of insertion teeth arranged at intervals along the second direction. The plurality of insertion teeth are respectively inserted into the plurality of unit slots; Alternatively, the insertion cavity is an integral slot communicating along the second direction, the insertion part is a plug board matching the integral slot, and the plug board is inserted into the integral slot.

4. The battery pack frame according to claim 1, characterized in that, Sealing glue is applied between the insertion part and the inner wall of the insertion cavity; And / or, the insertion part is welded at the opening of the insertion cavity to form a sealed weld seam.

5. The battery pack frame according to any one of claims 1 to 4, characterized in that, The battery pack frame further comprises: A cross beam, which is distributed on the plate surface of the bottom plate along the first direction, and its two ends are respectively connected to the two side beams. Flow collector avoidance grooves are respectively provided at the two ends of the cross beam in the first direction; A reinforcing member, which includes a cover plate and a support part connected to the cover plate and protruding towards the flow collector avoidance groove. The cover plate covers the opening of the flow collector avoidance groove, and the support part abuts against the inner walls on both sides of the flow collector avoidance groove in the first direction.

6. The battery pack frame according to claim 5, characterized in that, The support part is provided with a weight reduction cavity, and reinforcing ribs distributed along the first direction are arranged in the weight reduction cavity.

7. The battery pack frame according to claim 5, characterized in that, The two ends of the cross beam in the first direction are provided with concave surfaces, and the two side beams are respectively provided with base protrusion parts, and the base protrusion parts are fitted with the concave surfaces.

8. The battery pack frame according to claim 7, characterized in that, [[ID=?]]The cross beam has a cavity inside, and the part of the cavity section corresponding to the base protrusion part is arranged in a "field" shape.

9. A power battery pack, characterized in that, Comprising a battery cell and the battery pack frame according to any one of claims 1 to 8, and the battery cell is installed inside the battery pack frame.

10. A vehicle, characterized in that, Comprising a vehicle body and the power battery pack according to claim 9, and the power battery pack is installed on the vehicle body. It should be noted that there seems to be a problem with the tag number in [[ID=?]]. It should be in the original text. The translation is adjusted accordingly.

Images