Battery pack end plate, battery pack and vehicle

Abstract

The invention discloses a battery pack end plate, a battery pack and a vehicle, the battery pack end plate comprises a body and a reinforcing assembly, the body is provided with a cavity, the reinforcing assembly is arranged in the cavity and connected with the inner wall of the cavity, and the reinforcing rib assembly comprises a transverse reinforcing rib and a longitudinal reinforcing rib which intersect with each other. And first reinforcing bosses are arranged at the intersections of the longitudinal reinforcing ribs and the transverse reinforcing ribs. The battery pack end plate disclosed by the invention has relatively high structural strength, good anti-deformation performance and light weight.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a battery pack end plate, a battery pack and a vehicle. Background Art

[0002] The power battery system is the most important component of new energy vehicles. With the development of new energy vehicles, the energy density requirements for power battery systems are getting higher and higher.

[0003] The existing power battery system generally includes a box body and a plurality of power battery modules arranged in the box body. The power battery module includes a shell and battery cells located in the shell. The power battery module end plate is a part of the shell of the power battery module, which has protective properties and is used to protect the battery cells in the shell from external damage.

[0004] Due to the expansion of the battery cells, the module end plates are prone to extrusion damage when squeezed by the expansion of the battery cells. In the related art, the structural strength of the end plates is improved by increasing the thickness of the end plates or constructing reinforcing ribs. However, increasing the thickness of the end plates will increase the cost and weight of the battery pack, and there are also many problems in improving the structural strength by constructing reinforcing ribs. For example, the connection of the reinforcing ribs is prone to breakage due to stress concentration. Summary of the invention

[0005] The technical problem to be solved by the present invention is that, in view of the defects and shortcomings of the prior art, a battery pack end plate is provided, in which a transverse reinforcing rib and a longitudinal reinforcing rib arranged in an intersecting manner are provided in the cavity of the battery pack end plate, and a reinforcing protrusion is provided at the intersection of the transverse reinforcing rib and the longitudinal reinforcing rib. The transverse reinforcing rib and the longitudinal reinforcing rib arranged in an intersecting manner can improve the structural strength of the main body to match the expansion force of the battery cell. The first reinforcing protrusion arranged at the intersection can serve as a fixed support for the transverse reinforcing rib and the longitudinal reinforcing rib to further improve the structural strength of the main body, and can also reduce the stress at the staggered position of the reinforcing rib, thereby reducing the risk of reinforcing rib breakage.

[0006] The present invention also provides a battery pack.

[0007] The present invention further provides a vehicle.

[0008] The battery pack end plate of an embodiment of the present invention includes a main body and a reinforcement assembly, the main body has a cavity, the reinforcement assembly is arranged in the cavity and connected to the inner wall of the cavity, and the reinforcement rib assembly includes intersecting transverse reinforcement ribs and longitudinal reinforcement ribs, and a first reinforcement boss is provided at the intersection of the longitudinal reinforcement ribs and the transverse reinforcement ribs.

[0009] The battery pack end plate of the embodiment of the present invention has a main body with a cavity, and the reinforcement assembly includes a transverse reinforcement rib and a longitudinal reinforcement rib, both of which are connected to the inner wall of the cavity, and a first reinforcement boss is provided at the intersection of the longitudinal reinforcement rib and the transverse reinforcement rib. Therefore, the transverse reinforcement rib and the longitudinal reinforcement rib arranged in an intersecting manner can improve the structural strength of the main body to match the expansion force of the battery cell, and the first reinforcement boss arranged at the intersection can serve as a fixed support for the transverse reinforcement rib and the longitudinal reinforcement rib to further improve the structural strength of the main body, and can also reduce the stress at the staggered position of the reinforcement rib, thereby reducing the risk of reinforcement rib breakage.

[0010] In some embodiments, the reinforcement component also includes an oblique reinforcement rib, which is arranged between the first reinforcement boss and the inner wall of the cavity, and the extension direction of the oblique reinforcement rib is at an angle to the extension direction of the transverse reinforcement rib, and the extension direction of the oblique reinforcement rib is at an angle to the extension direction of the longitudinal reinforcement rib.

[0011] In some embodiments, a second reinforcing boss is provided at the connection between the transverse reinforcing rib and the inner side wall of the cavity;

[0012] and / or, a second reinforcing boss is provided at the connection between the longitudinal reinforcing rib and the inner side wall of the cavity;

[0013] And / or, a second reinforcing boss is provided at the connection between the oblique reinforcing rib and the inner side wall of the cavity.

[0014] In some embodiments, the cavity has an opening, and a fixing boss protruding toward the opening is provided on the inner bottom wall of the cavity, and an end of the fixing boss away from the inner bottom wall of the cavity has a connecting hole.

[0015] In some embodiments, a supporting boss is further provided on the inner bottom wall of the cavity, and an end of the supporting boss facing away from the inner bottom wall of the cavity extends out of the opening and is used to support the cover of the battery pack.

[0016] In some embodiments, the supporting boss is connected to the reinforcing assembly, and / or the fixing boss is connected to the reinforcing assembly.

[0017] In some embodiments, the main body includes a bottom plate and a peripheral plate connected to the bottom plate, the bottom plate and the peripheral plate enclose the cavity, and the peripheral plate includes two large-surface side panels spaced apart in the length direction of the main body and connecting side panels connected at both ends of the two large-surface side panels, the two ends of the transverse reinforcement rib are respectively connected to the two large-surface side panels, and the two ends of the longitudinal reinforcement rib are respectively connected to the two connecting side panels.

[0018] In some embodiments, the transverse reinforcing ribs are perpendicular to and intersect the longitudinal reinforcing ribs.

[0019] The battery pack of the embodiment of the present invention includes the battery pack end plate described in the above embodiment.

[0020] The battery pack of the embodiment of the present invention adopts the above-mentioned battery pack end plate, and the cavity of the battery pack end plate is provided with transverse reinforcing ribs and longitudinal reinforcing ribs arranged in an intersecting manner, and a first reinforcing boss is provided at the intersection of the transverse reinforcing ribs and the longitudinal reinforcing ribs. Therefore, the transverse reinforcing ribs and the longitudinal reinforcing ribs arranged in an intersecting manner can improve the structural strength of the end plate to match the expansion force of the battery cell. The first reinforcing boss provided at the intersection can serve as a fixed support for the transverse reinforcing ribs and the longitudinal reinforcing ribs to further improve the structural strength of the main body, and can also reduce the stress at the staggered positions of the reinforcing ribs and reduce the risk of rib breakage. The battery pack has high structural stability.

[0021] The vehicle according to the embodiment of the present invention includes the battery pack described in the above embodiment.

[0022] The vehicle of the embodiment of the present invention adopts the above-mentioned battery pack, and the cavity of the battery pack end plate is provided with transverse reinforcing ribs and longitudinal reinforcing ribs arranged in an intersecting manner, and a first reinforcing boss is provided at the intersection of the transverse reinforcing ribs and the longitudinal reinforcing ribs. Therefore, the transverse reinforcing ribs and the longitudinal reinforcing ribs arranged in an intersecting manner can improve the structural strength of the end plate to match the expansion force of the battery cell. The first reinforcing boss arranged at the intersection can serve as a fixed support for the transverse reinforcing ribs and the longitudinal reinforcing ribs to further improve the structural strength of the main body, and can also reduce the stress at the staggered position of the reinforcing ribs and reduce the risk of reinforcing rib breakage. The battery pack has high structural stability and good vehicle performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a battery pack end plate according to an embodiment of the present invention.

[0024] Figure 2 is a side view of an end plate of a battery pack according to an embodiment of the present invention.

[0025] Figure 3 is a top view of an end plate of a battery pack according to an embodiment of the present invention.

[0026] Figure 4 It is an enlarged view of the local structure of the battery pack end plate according to an embodiment of the present invention.

[0027] Figure 5 It is an enlarged view of the local structure of the battery pack end plate according to an embodiment of the present invention.

[0028] Figure 6 Schematic diagram of the structure of the bottom plate of the battery pack end plate according to an embodiment of the present invention.

[0029] Figure 7is a schematic structural diagram of a connecting side plate of a battery pack end plate according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] Main body 10, reinforcing assembly 11, longitudinal reinforcing ribs 111, transverse reinforcing ribs 112, oblique reinforcing ribs 113, first reinforcing boss 114, large side panel 101, fixing boss 12, connecting hole 121, supporting boss 13, supporting plane 131, internal threaded hole 132, groove 133, bottom plate 14, fixing hole 141, connecting side panel 15, assembly hole 151, reinforcing transverse ribs 152, reinforcing vertical ribs 153, and ring edge 154. DETAILED DESCRIPTION

[0032] 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.

[0033] like Figure 1-Figure 7 As shown, the battery pack end plate of the embodiment of the present invention includes a main body 10 and a reinforcing assembly 11, the main body 10 has a cavity, the reinforcing rib assembly is arranged in the cavity and includes intersecting transverse reinforcing ribs 112 and longitudinal reinforcing ribs 111, the longitudinal reinforcing ribs 111 and the transverse reinforcing ribs 112 are both connected to the inner wall of the cavity, and a first reinforcing boss 114 is provided at the intersection of the longitudinal reinforcing ribs 111 and the transverse reinforcing ribs 112.

[0034] Specifically, Figure 1-Figure 6 For example, the body 10 includes a bottom plate 14 and a peripheral plate connected to the bottom plate 14, the bottom plate 14 and the peripheral plate enclose a cavity, and the peripheral plate includes two large side plates 101 spaced apart in the length direction of the body 10 and a connecting side plate 15 connected to both ends of the two large side plates 101, the two ends of the transverse reinforcing rib 112 are respectively connected to the two large side plates 101, and the two ends of the longitudinal reinforcing rib 111 are respectively connected to the two connecting side plates 15. Preferably, the transverse reinforcing rib 112 is perpendicular to and intersects the longitudinal reinforcing rib 111.

[0035] It can be understood that the battery pack end plate is arranged at the end of the battery cell module and the large side plate 101 is in direct contact with the battery cell. The expansion of the battery cell will squeeze the large side plate 101, and the reinforcing ribs arranged in the cavity can support the main body 10 from the inside to prevent the main body 10 from collapsing or being damaged under pressure. The transverse reinforcing ribs 112 and the longitudinal reinforcing ribs 111 of the present application are arranged in an intersecting manner, which is convenient for evenly distributing pressure and has good anti-deformation effect. The first reinforcing protrusion arranged at the intersection can serve as a fixed support for the transverse reinforcing ribs 112 and the longitudinal reinforcing ribs 111 to further enhance the structural strength of the end plate, and can also reduce the stress at the staggered position of the reinforcing ribs, thereby reducing the risk of reinforcing rib breakage.

[0036] The battery pack end plate of the embodiment of the present invention has a main body 10 with a cavity, and the reinforcement assembly 11 includes a transverse reinforcement rib 112 and a longitudinal reinforcement rib 111, both of which are connected to the inner wall of the cavity, and a first reinforcement boss 114 is provided at the intersection of the longitudinal reinforcement rib 111 and the transverse reinforcement rib 112. Therefore, the transverse reinforcement rib 112 and the longitudinal reinforcement rib 111 arranged in an intersecting manner can improve the structural strength of the main body 10 to match the expansion force of the battery cell, and the first reinforcement boss provided at the intersection can serve as a fixed support for the transverse reinforcement rib 112 and the longitudinal reinforcement rib 111 to further improve the structural strength of the main body 10, and can also reduce the stress at the intersecting position of the reinforcement ribs, thereby reducing the risk of reinforcement rib breakage.

[0037] Preferably, the end plate is integrally die-casted using ADC12 or A380 material to reduce the complexity of installation and manufacturing, and the aluminum casting process is used to reduce the weight of the end plate and achieve lightweight structural parts.

[0038] Preferably, the distance between the two large-surface side panels 101 is between 20 mm and 50 mm.

[0039] Furthermore, if Figure 3 and Figure 5 As shown, the reinforcement assembly 11 further includes an oblique reinforcement rib 113, which is disposed between the first reinforcement boss 114 and the inner side wall of the cavity, and the extension direction of the oblique reinforcement rib 113 forms an angle with the extension direction of the transverse reinforcement rib 112, and the extension direction of the oblique reinforcement rib 113 forms an angle with the extension direction of the longitudinal reinforcement rib 111. Thus, the oblique reinforcement rib 113 can share the stress at the intersection of the transverse reinforcement rib 112 and the longitudinal reinforcement rib 111, avoiding stress concentration leading to reinforcement rib tearing, and at the same time can increase the number of reinforcement ribs arranged in the local area, further improving the structural strength of the body 10.

[0040] Preferably, the transverse reinforcing ribs 112 are multiple and are arranged at intervals in the length direction of the cavity, and the longitudinal reinforcing ribs 111 are multiple and are arranged at intervals in the width direction of the cavity. The multiple transverse reinforcing ribs 112 and the longitudinal reinforcing ribs 111 can form multiple intersection points spaced apart in the length direction of the cavity, and the distance between adjacent intersection points is between 5mm and 30mm.

[0041] Preferably, the layout space of the transverse reinforcing ribs 112, the longitudinal reinforcing ribs 111 and the transverse reinforcing ribs 112 accounts for between 10% and 70% of the cavity.

[0042] Preferably, a second reinforcing boss is provided at the connection between the transverse reinforcing rib 112 and the inner wall of the cavity, thereby reducing stress concentration at the connection between the transverse reinforcing rib 112 and the inner wall of the cavity.

[0043] Preferably, a second reinforcing boss is provided at the connection between the longitudinal reinforcing rib 111 and the inner wall of the cavity, thereby reducing stress concentration at the connection between the longitudinal reinforcing rib 111 and the inner wall of the cavity.

[0044] Preferably, a second reinforcing boss is provided at the connection between the oblique reinforcing rib 113 and the inner wall of the cavity, thereby reducing stress concentration at the connection between the oblique reinforcing rib 113 and the inner wall of the cavity.

[0045] Furthermore, if Figure 4 As shown, the cavity has an opening, and a fixing boss 12 protruding toward the opening is provided on the inner bottom wall of the cavity, and one end of the fixing boss 12 away from the inner bottom wall of the cavity has a connecting hole 121. It should be noted that when the battery cover package end plate is assembled, in addition to being connected to the battery package bottom plate 14, it also needs to cooperate with some auxiliary brackets in the battery system, so the fixing boss 12 can be used as a connecting column that cooperates with the auxiliary bracket and can also be used to assist the reinforcing component 11 to strengthen the body 10 as a whole.

[0046] Preferably, there are a plurality of fixing bosses 12 arranged at intervals, and the specific layout is subject to actual assembly requirements.

[0047] Preferably, the height of the boss is between 5 mm and 150 mm, which can be set according to assembly requirements.

[0048] Furthermore, in order to ensure the connection strength, the connection hole 121 can be set as a threaded hole, and the depth of the connection hole 121 is not less than 3 mm.

[0049] Optionally, both the first reinforcing boss 114 and the second reinforcing boss may be constructed as the fixing boss 12 .

[0050] Furthermore, if Figure 5 As shown, a support boss 13 is also provided on the inner bottom wall of the cavity, and the end of the support boss 13 away from the inner bottom wall of the cavity extends out of the opening and is used to support the cover of the battery pack. It should be noted that the cover of the battery pack is deformed when it is squeezed by external force. The present application solves the problem of cover deformation caused by the highly integrated battery system by providing a support boss 13, which can be supported below the cover. The support boss 13 can also be used as a reinforcing column to assist the reinforcing assembly 11 in reinforcing the body 10 as a whole. Preferably, the protruding height of the support boss 13 relative to the body 10 is not less than 5mm.

[0051] Specifically, the top of the supporting boss 13 is a supporting plane 131, and a groove 133 and an internal threaded hole 132 are provided on the supporting plane 131. The groove 133 can be used to install a sealing ring to ensure the sealing effect between the supporting boss 13 and the cover plate, thereby ensuring that the power battery system is waterproof and dustproof. The internal threaded hole 132 is fixed to the upper cover plate by fixing screws.

[0052] Preferably, if Figure 5 As shown, the support boss 13 is connected to the reinforcing assembly 11. Thus, the force of the support boss 13 can be uniformly applied to the body 10 through the reinforcing assembly 11, thereby improving the support reliability.

[0053] Preferably, the fixing boss 12 is connected to the reinforcing component 11 .

[0054] Furthermore, a fixing hole 141 is provided on the bottom plate 14 of the main body 10. The fixing hole 141 includes but is not limited to a hexagonal, circular or square shape. The fixing hole 141 is used to embed a rivet screw or a rivet nut for fixing the end plate to the box body.

[0055] The connecting side plate 15 includes a main body plate and a ring edge 154 surrounding the outer circumference of the main body plate. The main body plate is provided with reinforcing transverse ribs 152 and reinforcing vertical ribs 153 to improve the structural strength of the main body plate. The main body plate is provided with an assembly hole 151. The ring edge 154 can be used to be welded and fixed to the battery pack box, and the assembly hole 151 can be used for positioning or fixed connection.

[0056] The battery pack according to the embodiment of the present invention includes the battery pack end plate according to the above embodiment.

[0057] The battery pack of the embodiment of the present invention adopts the above-mentioned battery pack end plate, and the cavity of the battery pack end plate is provided with transverse reinforcing ribs 112 and longitudinal reinforcing ribs 111 arranged in an intersecting manner, and a first reinforcing boss 114 is provided at the intersection of the transverse reinforcing ribs 112 and the longitudinal reinforcing ribs 111. Therefore, the transverse reinforcing ribs 112 and the longitudinal reinforcing ribs 111 arranged in an intersecting manner can improve the structural strength of the end plate to match the expansion force of the battery cell, and the first reinforcing boss arranged at the intersection can serve as a fixed support member for the transverse reinforcing ribs 112 and the longitudinal reinforcing ribs 111 to further improve the structural strength of the main body 10, and can also reduce the stress at the staggered position of the reinforcing ribs and reduce the risk of rib breakage. The battery pack has high structural stability.

[0058] The vehicle according to the embodiment of the present invention includes the battery pack according to the above embodiment.

[0059] The vehicle of the embodiment of the present invention adopts the above-mentioned battery pack, and the cavity of the battery pack end plate is provided with transverse reinforcing ribs 112 and longitudinal reinforcing ribs 111 arranged in an intersecting manner, and a first reinforcing boss 114 is provided at the intersection of the transverse reinforcing ribs 112 and the longitudinal reinforcing ribs 111. Therefore, the transverse reinforcing ribs 112 and the longitudinal reinforcing ribs 111 arranged in an intersecting manner can improve the structural strength of the end plate to match the expansion force of the battery cell. The first reinforcing boss arranged at the intersection can serve as a fixed support member for the transverse reinforcing ribs 112 and the longitudinal reinforcing ribs 111 to further improve the structural strength of the main body 10, and can also reduce the stress at the staggered position of the reinforcing ribs and reduce the risk of reinforcing rib breakage. The battery pack has high structural stability and good vehicle performance.

[0060] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A battery pack end plate, It is characterized in that It includes a main body and a reinforcement component, the main body has a cavity, the reinforcement component is arranged in the cavity and connected to the inner wall of the cavity, and the reinforcement rib component includes intersecting transverse reinforcement ribs and longitudinal reinforcement ribs, and a first reinforcement boss is provided at the intersection of the longitudinal reinforcement ribs and the transverse reinforcement ribs.

2. The battery pack end plate according to claim 1, It is characterized in that The reinforcement component also includes an oblique reinforcement rib, which is arranged between the first reinforcement boss and the inner wall of the cavity, and the extension direction of the oblique reinforcement rib is at an angle to the extension direction of the transverse reinforcement rib, and the extension direction of the oblique reinforcement rib is at an angle to the extension direction of the longitudinal reinforcement rib.

3. The battery pack end plate according to claim 2, It is characterized in that A second reinforcing boss is provided at the connection between the transverse reinforcing rib and the inner side wall of the cavity; and / or, a second reinforcing boss is provided at the connection between the longitudinal reinforcing rib and the inner side wall of the cavity; And / or, a second reinforcing boss is provided at the connection between the oblique reinforcing rib and the inner side wall of the cavity.

4. The battery pack end plate according to claim 1, It is characterized in that The cavity has an opening, and a fixing boss protruding toward the opening is arranged on the inner bottom wall of the cavity, and a connecting hole is arranged at one end of the fixing boss away from the inner bottom wall of the cavity.

5. The battery pack end plate according to claim 4, It is characterized in that A supporting boss is also provided on the inner bottom wall of the cavity, and the end of the supporting boss facing away from the inner bottom wall of the cavity extends out of the opening and is used to support the cover plate of the battery pack.

6. The battery pack end plate according to claim 5, It is characterized in that The supporting boss is connected to the reinforcing assembly, and / or the fixing boss is connected to the reinforcing assembly.

7. The battery pack end plate according to any one of claims 1 to 6, It is characterized in that The main body includes a bottom plate and a peripheral plate connected to the bottom plate, the bottom plate and the peripheral plate enclose the cavity, and the peripheral plate includes two large-surface side plates spaced apart in the length direction of the main body and connecting side plates connected at both ends of the two large-surface side plates, the two ends of the transverse reinforcement rib are respectively connected to the two large-surface side plates, and the two ends of the longitudinal reinforcement rib are respectively connected to the two connecting side plates.

8. The battery pack end plate according to claim 7, It is characterized in that The transverse reinforcing ribs are perpendicular to and intersect the longitudinal reinforcing ribs.

9. A battery pack, It is characterized in that Comprising a battery pack end plate according to any one of claims 1-8.

10. A vehicle, It is characterized in that Comprising the battery pack according to claim 9.

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