Battery pack bottom protection plate, battery pack and vehicle

Abstract

The utility model belongs to the technical field of batteries, and provides a battery pack bottom protection plate, a battery pack and a vehicle. The battery pack bottom protection plate comprises a plate body, the plate body comprises a first protruding strip and bosses, the first protruding strip comprises at least two protruding strip sections arranged at intervals in the first direction, and the bosses are arranged between the adjacent protruding strip sections. According to the battery pack bottom protection plate provided by the invention, the deformation of the battery pack bottom protection plate after the manufacturing is finished is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular, to a bottom guard plate of a battery pack, a battery pack, and a vehicle. Background Art

[0002] A battery pack is used to provide electrical energy for an electric vehicle, and the battery pack is usually arranged on the chassis of the electric vehicle.

[0003] The battery pack includes a battery pack housing and a battery cell module located in the battery pack housing. The battery pack housing is used to protect the battery cell module located therein. One side of the battery pack housing facing the ground is vulnerable to the impact of foreign objects on the ground. Therefore, a bottom guard plate of the battery pack can be arranged on the side of the battery pack housing facing the ground, and the bottom guard plate of the battery pack can be made of a metal with relatively high strength.

[0004] In the related art, the bottom guard plate of the battery pack is prone to deformation due to stress after being manufactured. Utility Model Content

[0005] The present application provides a bottom guard plate of a battery pack, a battery pack, and a vehicle, which avoids the deformation of the bottom guard plate of the battery pack after being manufactured.

[0006] The present application provides a bottom guard plate of a battery pack, including a plate body. The plate body includes a first rib and a boss. The first rib includes at least two rib segments arranged at intervals along a first direction, and a boss is arranged between adjacent rib segments.

[0007] In a possible implementation manner, for the bottom guard plate of the battery pack provided by the present application, the plate body has a first surface and a second surface opposite to each other in the thickness direction. The second surface faces the battery pack housing. A plurality of first ribs are arranged at intervals along a second direction on the second surface, and / or a plurality of bosses are arranged at intervals along the second direction on the second surface.

[0008] In a possible implementation manner, for the bottom guard plate of the battery pack provided by the present application, the plate body further includes a plurality of first grooves. The first grooves are recessed from the first surface towards the second surface to form the first ribs on the second surface, and / or the plate body further includes a plurality of second grooves. The second grooves are recessed from the first surface towards the second surface to form the bosses on the second surface.

[0009] In a possible implementation manner, for the bottom guard plate of the battery pack provided by the present application, the boss includes an extension wall and a protruding wall. The extension wall extends from the plate body to the protruding wall, and a mounting hole is formed on the protruding wall, and the mounting hole penetrates the protruding wall in the thickness direction.

[0010] In a possible implementation manner, for the bottom guard plate of the battery pack provided by the present application, the plate body further includes at least one second rib. The second rib extends from one end of the plate body to the other end along the first direction, and the second rib and the first rib are arranged at intervals along the second direction.

[0011] In a possible implementation, for the battery pack bottom guard plate provided by the present application, a third groove extending in the first direction is provided on the first surface, and the third groove is recessed from the first surface towards the second surface to form a second rib on the second surface.

[0012] In a possible implementation, for the battery pack bottom guard plate provided by the present application, the plate body further includes a third rib, and two ends of the third rib are respectively connected to the first ribs adjacent in the second direction, and / or two ends of the third rib are respectively connected to the second ribs adjacent in the second direction, and / or two ends of the third rib are respectively connected to the first rib and the second rib adjacent in the second direction.

[0013] In a possible implementation, for the battery pack bottom guard plate provided by the present application, a communication groove is provided on the first surface, and the communication groove is recessed from the first surface towards the second surface to form a third rib on the second surface, and the communication groove communicates with the first groove or the third groove.

[0014] In a possible implementation, for the battery pack bottom guard plate provided by the present application, the width of the communication groove is smaller than the width of the first groove or the third groove.

[0015] In a possible implementation, for the battery pack bottom guard plate provided by the present application, it further includes a mounting edge, the mounting edge is arranged around the periphery of the plate body, the mounting edge is connected to the plate body, the mounting edge is located on the side of the second surface facing the battery pack housing and is spaced from the plate body.

[0016] In a possible implementation, for the battery pack bottom guard plate provided by the present application, the plate body and the mounting edge are connected by a rounded corner.

[0017] In a possible implementation, for the battery pack bottom guard plate provided by the present application, along the second direction, the distance between the first rib close to the edge of the plate body and the edge of the plate body is greater than or equal to the width of the first rib.

[0018] In a possible implementation, for the battery pack bottom guard plate provided by the present application, a protective coating is provided on the first surface.

[0019] The present application further provides a battery pack, including a battery pack housing, a battery cell module, and the above-mentioned battery pack bottom guard plate, the battery cell module is located in the battery pack housing, and the battery pack bottom guard plate is installed at the bottom of the battery pack housing.

[0020] In a possible implementation, for the battery pack provided by the present application, the battery pack housing includes a bottom plate, the second surface of the battery pack bottom guard plate faces the battery pack housing, and the bottom plate is in contact with the first rib and the boss.

[0021] The present application further provides a vehicle, including at least one of the above-mentioned battery packs.

[0022] The bottom protection plate of the battery pack provided by this application includes a plate body. The plate body includes a first rib and a boss. The first rib includes at least two rib segments arranged at intervals in the first direction. By setting the first rib as multiple rib segments, the length of the first rib can be reduced, which can avoid deformation in a local area of the plate body or excessive strain on the first rib from reacting back on the plate body and causing the plate body to deform again. Thus, the deformation of the bottom protection plate of the battery pack can be reduced. A boss is provided between adjacent rib segments. By providing a boss between adjacent rib segments, the stress in the area between the two rib segments of the plate body can also be released to reduce the deformation in the area between the ribs. Thus, the deformation of the bottom protection plate of the battery pack can be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic structural diagram of the battery pack provided by the embodiment of this application;

[0025] Figure 2 is Figure 1 a view from another angle of

[0026] Figure 3 is Figure 2 an exploded view of

[0027] Figure 4 is a schematic structural diagram of the bottom protection plate of the battery pack provided by the embodiment of this application;

[0028] Figure 5 is Figure 4 a view from another angle of

[0029] Figure 6 is a cross-sectional schematic diagram of the bottom protection plate of the battery pack provided by the embodiment of this application;

[0030] Figure 7 is a schematic diagram of the cooperation between the boss and the connecting piece in the bottom protection plate of the battery pack provided by the embodiment of this application;

[0031] Figure 8 is another schematic structural diagram of the bottom protection plate of the battery pack provided by the embodiment of this application;

[0032] Figure 9 is Figure 8 a view from another angle of

[0033] Figure 10Another structural schematic diagram of the battery pack bottom guard plate provided by the embodiment of the present application;

[0034] Figure 11 Another structural schematic diagram of the battery pack bottom guard plate provided by the embodiment of the present application;

[0035] Figure 12 Structural schematic diagram of the battery pack bottom guard plate and the bottom plate of the battery pack housing provided by the embodiment of the present application.

[0036] Explanation of reference numerals:

[0037] 100 - Battery pack housing; 110 - Bottom plate; 111 - Lifting structure; 120 - Side beam; 130 - Accommodating cavity; 131 - Sub - accommodating cavity; 140 - Partition; 150 - Connecting piece; 151 - End;

[0038] 200 - Battery pack bottom guard plate;

[0039] 210 - Plate body; 210a - First surface; 210b - Second surface;

[0040] 211 - First rib; 2111 - Rib segment;

[0041] 212 - Boss; 2121 - First mounting hole; 2122 - Extension wall; 2123 - Protruding wall;

[0042] 213 - First groove;

[0043] 214 - Second groove;

[0044] 215 - Second rib;

[0045] 216 - Third groove;

[0046] 217 - Third rib;

[0047] 218 - Connecting groove;

[0048] 219 - Mounting edge; 2191 - Second mounting hole;

[0049] 220 - Protective coating;

[0050] 300 - Battery cell;

[0051] 1000 - Battery pack;

[0052] D1 - First spacing;

[0053] W1 - First width;

[0054] W2 - Second width;

[0055] R - Round chamfer;

[0056] X - The first direction;

[0057] Y - The second direction;

[0058] Z - The third direction. Detailed implementation manners

[0059] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0060] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0061] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0062] The terms "first", "second", "third" (if any) in the description and claims of the present application and the above accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0063] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or maintenance tool that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product or maintenance tool.

[0064] The battery pack is used to provide electrical energy for an electric vehicle, and the battery pack is usually arranged on the side of the electric vehicle facing the ground.

[0065] The battery pack includes a battery pack housing and a battery cell module located in the battery pack housing, and the battery pack housing is used to protect the battery cell module located therein. The side of the battery pack housing facing the ground is vulnerable to impacts from foreign objects on the ground. Therefore, a battery pack bottom guard plate can be provided on the side of the battery pack housing facing the ground.

[0066] With the increasing requirements for the protection of the battery pack bottom guard plate, the thickness of the battery pack bottom guard plate gradually increases to meet the higher protection requirements. High-strength steel can also be used to prepare the battery pack bottom guard plate to meet the higher protection requirements. The battery pack bottom guard plate can be processed by stamping or other forming methods. As the thickness or strength of the battery pack bottom guard plate increases, the stress generated during the processing will also increase, causing the battery pack bottom guard plate to deform or the surface of the battery pack bottom guard plate to deform.

[0067] Based on this, the present application provides a battery pack bottom guard plate, a battery pack and a vehicle, which avoid deformation of the battery pack bottom guard plate after it is manufactured.

[0068] Specifically, the vehicle can be an electric vehicle (EV), a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle. The vehicle can include one or more battery packs. The battery pack is used to provide electrical energy for the vehicle, and the battery pack can be installed on the side of the vehicle facing the ground.

[0069] Figure 1 Schematic structural diagram of the battery pack provided by the embodiment of the present application, Figure 2 is Figure 1 a view from another angle of Figure 3 is Figure 2 an exploded schematic diagram of

[0070] See Figures 1 to 3 As shown, the battery pack 1000 provided by the embodiment of the present application includes a battery pack housing 100, a battery cell module (not labeled in the figure), and a battery pack bottom guard plate 200. The battery cell module is located in the battery pack housing 100, and the battery pack bottom guard plate 200 is installed on the bottom of the battery pack housing 100.

[0071] The battery pack housing 100 can be a flat cuboid, cube or frustum of a cone. The battery pack housing 100 includes a first direction X, a second direction Y and a third direction Z. The first direction X and the second direction Y intersect, and both are perpendicular to the third direction Z. Specifically, in Figures 1 to 3 the battery pack housing 100 is a cuboid, the first direction X can be the length direction of the battery pack housing 100, and the second direction Y can be the width direction of the battery pack housing 100. When the battery pack 1000 is assembled to a vehicle, the first direction X can be the forward or backward direction of the vehicle, and the second direction Y can be the left - right direction of the vehicle. In some other embodiments, the first direction X can be a direction inclined relative to the length direction of the battery pack housing 100, and the second direction Y can be a direction inclined relative to the width direction of the battery pack housing 100.

[0072] The battery pack housing 100 further includes side beams 120. The side beams 120 and the bottom plate 110 form a receiving cavity 130. The battery pack housing 100 further includes partitions 140. The partitions 140 divide the receiving cavity 130 into a plurality of sub - receiving cavities 131. In Figure 1 it is shown that two partitions 140 are cross - arranged to divide the receiving cavity 130 into four sub - receiving cavities 131. One or more battery cell modules can be arranged in each sub - receiving cavity 131. The battery cell module includes a plurality of battery cells 300. In Figure 1 one battery cell 300 is schematically shown in each sub - receiving cavity 131. The battery pack housing 100 may further include an upper cover (not labeled in the figure).

[0073] When the battery pack 1000 is installed on a vehicle, the bottom plate 110 of the battery pack housing 100 faces the ground. During vehicle driving, gravel or other foreign objects on the ground will impact the bottom plate 110 of the battery pack housing 100. Therefore, a battery pack bottom guard plate 200 can be provided on the bottom plate 110 of the battery pack housing 100. The battery pack bottom guard plate 200 can be made of a metal material with greater strength. For example, the battery pack bottom guard plate 200 can be made of steel, and the thickness of the battery pack bottom guard plate 200 can also be set larger to provide better protection for the battery pack housing 100.

[0074] Figure 4 It is a schematic structural view of the battery pack bottom guard plate provided by the embodiment of the present application. Figure 5 is Figure 4 a view from another angle.

[0075] See Figure 4 and Figure 5As shown, the bottom protection plate 200 provided in the embodiment of the present application includes a plate body 210. The plate body 210 includes a first rib 211 and a boss 212. The first rib 211 includes at least two rib segments 2111 arranged at intervals in a first direction. A boss 212 is provided between adjacent rib segments 2111.

[0076] The bottom protection plate 200 can be disposed on the bottom plate 110 of the battery pack housing 100 and connected to the bottom plate 110. The bottom protection plate 200 includes a plate body 210. The thickness direction of the plate body 210 is the third direction Z. The plate body 210 can be set to be relatively thick. For example, the thickness of the plate body 210 can be 0.7 mm - 1 mm.

[0077] One side of the plate body 210 facing the ground is the first surface 210a, and one side of the plate body 210 facing the bottom plate 110 of the battery pack housing 100 is the second surface 210b. Among them, Figure 4 The structure of the second surface 210b is shown in Figure 5 The structure of the first surface 210a is shown.

[0078] The first rib 211 protruding from the first surface 210a towards the second surface 210b can be formed by stamping on the plate body 210. The first rib 211 protruding from the second surface 210b towards the first surface 210a can also be formed by stamping on the plate body 210. The first rib 211 can also be formed by installing a reinforcing member on the surface of the plate body 210. The first rib 211 can absorb part of the stress during the processing of the plate body 210, thereby reducing the deformation of the plate body 210. The first rib 211 can extend along the first direction X.

[0079] The first rib 211 can be set to include a plurality of rib segments 2111 arranged at intervals in the first direction X. Thus, when the first rib 211 is formed by stamping, setting the first rib 211 to include a plurality of rib segments 2111 arranged at intervals in the first direction X makes the length of the first rib 211 shorter, which can reduce the dimensional deviation of the first rib 211 in the first direction X during stamping and avoid deformation in a local area of the plate body 210. When the first rib 211 is a reinforcing member, setting the first rib 211 to include a plurality of rib segments 2111 arranged at intervals in the first direction X can prevent excessive strain on the first rib 211 from reacting on the plate body 210 when the length of the first rib 211 is too long, causing the plate body 210 to deform again. In Figure 4 and Figure 5 Two rib segments 2111 arranged at intervals in the first direction X are shown. In other embodiments, the first rib 211 can include three or more rib segments 2111 arranged at intervals in the first direction X.

[0080] A boss 212 can be provided between two rib segments 2111 adjacent along the first direction X. The boss 212 can be a boss 212 formed by stamping on the plate body 210 and protruding from the first surface 210a towards the second surface 210b. The boss 212 can also be a boss 212 formed by stamping on the plate body 210 and protruding from the second surface 210b towards the first surface 210a. The boss 212 can also be a small boss provided on the surface of the plate body 210. The boss 212 can absorb the stress during the processing of the plate body 210. Thus, the stress in the region between the two rib segments 2111 of the plate body 210 can also be released, so as to reduce the deformation of the region between the rib segments 2111.

[0081] Thus, through this structure in which the rib segments 2111 and the bosses 212 are arranged at intervals, the deformation occurring after the manufacturing of the bottom guard plate 200 of the battery pack can be reduced.

[0082] The bottom guard plate 200 provided in the embodiment of the present application, by providing the plate body 210, the plate body 210 includes the first rib 211 and the boss 212, the first rib 211 includes at least two rib segments 2111 arranged at intervals along the first direction. By setting the first rib 211 as multiple rib segments 2111, the length of the first rib 211 can be reduced, and the deformation of a local area of the plate body 210 can be avoided or the strain on the first rib 211 being too large and reacting on the plate body 210 again, causing the plate body 210 to deform again can be avoided. Thus, the deformation of the bottom guard plate 200 of the battery pack can be reduced. A boss 212 is provided between adjacent rib segments 2111. By providing the boss 212 between adjacent rib segments 2111, the stress in the region between the two rib segments 2111 of the plate body 210 can also be released, so as to reduce the deformation of the region between the rib segments 2111. Thus, the deformation of the bottom guard plate 200 of the battery pack can be further reduced.

[0083] Please continue to refer to Figure 4 and Figure 5 As shown, multiple first ribs 211 are arranged at intervals along the second direction Y on the second surface 210b, and / or, multiple bosses 212 are arranged at intervals along the second direction Y on the second surface 210b.

[0084] There can be multiple first ribs 211, and the multiple first ribs 211 are arranged at intervals along the second direction Y; there can be multiple bosses 212, and the multiple bosses 212 are arranged at intervals along the second direction Y. Thus, the stress in the second direction Y can be fully released. In Figure 4 Six first ribs 211 and six bosses 212 are schematically shown.

[0085] Both the first rib 211 and the boss 212 are provided on the second surface 210b, that is, both the first rib 211 and the boss 212 are provided on the surface facing away from the ground, which can also prevent foreign objects from hitting the first rib 211 and the boss 212, thereby preventing the first rib 211 and the boss 212 from being damaged.

[0086] Figure 6 It is a schematic cross-sectional view of the battery pack bottom guard plate provided by the embodiment of the present application.

[0087] See Figures 4 to 6 As shown, the plate body 210 further includes a plurality of first grooves 213. The first grooves 213 are recessed from the first surface 210a towards the second surface 210b to form the first rib 211 on the second surface 210b.

[0088] For example, when stamping the first rib 211, stamping from the first surface 210a towards the second surface 210b can form the first groove 213 on the first surface 210a while forming the first rib 211. The first groove 213 extends along the first direction X. The first direction X is the traveling direction of the vehicle. The first groove 213 can guide the air flow, so that the air flow can flow along the first groove 213. Thus, the turbulent air flow at the bottom of the vehicle becomes the air flow flowing along the first direction X, thereby reducing the wind resistance during vehicle driving.

[0089] Figure 7 It is a schematic view of the cooperation between the boss and the connecting member in the battery pack bottom guard plate provided by the embodiment of the present application.

[0090] Among them, in Figure 7 the connecting member 150 is schematically shown in dotted lines.

[0091] See Figure 3 , Figure 5 and Figure 7 As shown, the plate body 210 further includes a plurality of second grooves 214. The second grooves 214 are recessed from the first surface 210a towards the second surface 210b to form the boss 212 on the second surface 210b.

[0092] The second groove 214 can also be recessed from the first surface 210a towards the second surface 210b to form the boss 212 on the second surface 210b. Thus, the first rib 211, the boss 212, the first groove 213 and the second groove 214 can be formed in one processing process, so as to simplify the processing steps of the battery pack bottom guard plate 200.

[0093] Please continue to refer to Figure 7As shown, the boss 212 includes an extension wall 2122 and a protruding wall 2123. The extension wall 2122 extends from the plate body 210 to the protruding wall 2123. A first mounting hole 2121 is formed in the protruding wall 2123, and the first mounting hole 2121 penetrates the protruding wall 2123 in the thickness direction.

[0094] Specifically, the boss 212 includes an extension wall 2122 extending from the plate body 210 toward the second surface 210b and a protruding wall 2123 connected to the extension wall 2122. The extension wall 2122 and the protruding wall 2123 form an inverted bowl-shaped structure, and the protruding wall 2123 is located at the bottom of the bowl. A first mounting hole 2121 is provided on the protruding wall 2123. The first mounting hole 2121 is a through hole that penetrates the plate body 210 in the thickness direction. The battery pack 1000 further includes a hoisting structure 111 and a connecting member 150. The first mounting hole 2121 is used to avoid the connecting member 150 so that the connecting member 150 can be mounted on the hoisting structure 111, so that the hoisting structure 111 penetrates and locks up and down. At the same time, the connecting member 150 can pass through the first mounting hole 2121 to mount the battery pack bottom guard plate 200 on the bottom plate 110 of the battery pack housing 100. By arranging the first mounting hole 2121 on the boss 212, the dimension of the boss 212 in the thickness direction can be greater than or equal to the dimension of the end portion 151 of the connecting member 150 in the thickness direction. Thus, it can be avoided that the end portion 151 of the connecting member 150 protrudes from the first surface 210a. When the battery pack housing 100 is placed on a plane, it can be avoided that the connecting member 150 presses the battery pack bottom guard plate 200 and the battery pack housing 100.

[0095] Figure 8 Another schematic structural view of the battery pack bottom guard plate provided by the embodiment of the present application Figure 9 is Figure 8 a view from another angle.

[0096] See Figure 8 and Figure 9 As shown, in a possible implementation manner, the plate body 210 further includes at least one second rib 215. The second rib 215 extends from one end of the plate body 210 to the other end along the first direction X, and the second rib 215 and the first rib 211 are arranged at intervals along the second direction Y.

[0097] The second rib 215 extending from one end of the plate body 210 to the other end can be arranged on the area of the plate body 210 with less deformation to simplify the structure of the reinforcing member. The second rib 215 and the first rib 211 are arranged at intervals along the second direction Y. For example, in Figure 8 and Figure 9 the middle area of the plate body 210 has less deformation, and the second rib 215 can be arranged in the middle area.

[0098] Please continue to refer to Figure 8 andFigure 9 As shown, in a possible implementation, a third groove 216 extending along the first direction X is provided on the first surface 210a, and the third groove 216 is recessed from the first surface 210a towards the second surface 210b to form a second rib 215 on the second surface 210b.

[0099] Thus, while there is the third groove 216 on the first surface 210a, a second rib 215 opposite to the third groove 216 can be formed, making the processing process of the second rib 215 and the third groove 216 relatively simple. The third groove 216 is a through groove extending along the first direction X. Thus, the third groove 216 has a better air guiding effect.

[0100] Please continue to refer to Figure 4 and Figure 8 As shown, the plate body 210 further includes a third rib 217. Two ends of the third rib 217 are respectively connected to the first ribs 211 adjacent along the second direction Y, and / or two ends of the third rib 217 are respectively connected to the second ribs 215 adjacent along the second direction Y, and / or two ends of the third rib 217 are respectively connected to the first rib 211 and the second rib 215 adjacent along the second direction Y.

[0101] The third rib 217 is arranged in a crosswise manner with the first rib 211 or the second rib 215. In the Figure 4 and Figure 8 shown implementation, the first rib 211 and the second rib 215 extend along the first direction X, and the third rib 217 can extend along the second direction Y. In other implementations, the third rib 217 can also extend in other directions as long as there is an included angle between the extending direction of the third rib 217 and the first direction X.

[0102] The third rib 217 is used to connect two adjacent ribs along the second direction Y. For example, when the first rib 211 is adjacent to the first rib 211 along the second direction Y, the third rib 217 is used to connect these two first ribs 211; when the second rib 215 is adjacent to the second rib 215 along the second direction Y, the third rib 217 is used to connect these two second ribs 215; when the first rib 211 and the second rib 215 are adjacent along the second direction Y, the third rib 217 is used to connect the first rib 211 and the second rib 215. Among them, the third rib 217 can be aligned along the first direction X or offset along the first direction X.

[0103] By providing the third rib 217 and connecting two adjacent ribs along the second direction Y with the third rib 217, the third rib 217 is equivalent to a reinforcing rib on the second surface 210b of the plate body 210. The third rib 217 can absorb part of the stress during the processing of the plate body 210 and also increase the overall strength of the plate body 210.

[0104] Please continue to refer to Figure 4 、 Figure 5 、 Figure 8 and Figure 9 As shown, the first surface 210a has a communicating groove 218. The communicating groove 218 is recessed from the first surface 210a towards the second surface 210b to form a third rib 217 on the second surface 210b. The communicating groove 218 communicates with the first groove 213 or the third groove 216.

[0105] The third rib 217 can be a long rib provided on the second surface 210b, or the third rib 217 can be formed by stamping on the plate body 210. During stamping, while the convex structure on the second surface 210b forms the third rib 217, the groove structure opposite to the convex structure forms the communicating groove 218, making the processing process of the communicating groove 218 and the third rib 217 relatively simple. The communicating groove 218 can communicate with the first groove 213 or the third groove 216. When the air flow in one of the first grooves 213 or the third grooves 216 is relatively large, the air flow can enter the other first groove 213 or the third groove 216 along the communicating groove 218, making the air flow in each of the first grooves 213 or the third grooves 216 relatively uniform. Thus, the air resistance in each of the first grooves 213 or the third grooves 216 is relatively close, and the air resistance along the second direction Y during vehicle driving is relatively close, making the vehicle drive more smoothly.

[0106] Figure 10 This is another schematic structural view of the battery pack bottom guard plate provided by the embodiment of the present application.

[0107] Refer to Figure 10 As shown, the width of the communicating groove 218 is smaller than the width of the first groove 213 or the third groove 216.

[0108] Since there is an angle between the communicating groove 218 and the first direction X, when the air flow flows along the communicating groove 218, the air resistance will increase slightly. The width of the first groove 213 or the third groove 216 is the first width W1, and the width of the communicating groove 218 is the second width W2, which can make the second width W2 smaller than the first width W1. Thus, the air flow flowing along the communicating groove 218 is smaller. Thus, while making the air flow in the multiple first grooves 213 or the third grooves 216 uniform, the increase in air resistance is smaller.

[0109] Please continue to refer to Figure 4 、 Figure 5 、 Figures 8 to 10 As shown, the battery pack bottom guard plate 200 further includes a mounting edge 219. The mounting edge 219 is disposed around the peripheral side of the plate body 210. The mounting edge 219 is located on the side of the second surface 210b facing the battery pack housing 100 and is spaced apart from the plate body 210.

[0110] The mounting edge 219 is provided with a plurality of second mounting holes 2191, and fasteners can be passed through the second mounting holes 2191 to connect the edge of the plate body 210 to the bottom plate 110 of the battery pack housing 100.

[0111] The mounting edge 219 can be an edge protruding from the second surface 210b towards the bottom plate 110 of the battery pack housing 100.

[0112] Please continue to refer to Figure 6 As shown, the plate body 210 and the mounting edge 219 are connected by a rounded corner.

[0113] The mounting edge 219 can also be formed by stamping on the edge of the plate body 210. A circular chamfer R is provided between the plate body 210 and the mounting edge 219, which can reduce the stress during the stamping process.

[0114] Please continue to refer to Figure 10 As shown, along the second direction Y, the distance between the first rib 211 close to the edge of the plate body 210 and the edge of the plate body 210 is greater than or equal to the width of the first rib 211.

[0115] The width of the first rib 211 is the first width W1 (the width of the first groove 213). The distance between the first rib 211 and the plate body 210 along the second direction Y and away from the edge of the plate body 210 is the first distance D1, and the first distance D1 is greater than or equal to the first width W1. Thus, it can be avoided that the size of the first rib 211 from the edge of the plate body 210 is too small, resulting in deformation such as flanging of the edge due to processing stress.

[0116] Figure 11 This is another structural schematic diagram of the battery pack bottom guard plate provided by the embodiment of the present application. Among them, Figure 11 The protective coating 220 and the plate body 210 are separated to clearly show the shapes of the protective coating 220 and the plate body 210.

[0117] Refer to Figure 11 As shown, a protective coating 220 is provided on the first surface 210a.

[0118] Specifically, the outer surface of the battery pack bottom guard plate 200 is usually coated with a paint layer to prevent the battery pack bottom guard plate 200 from oxidizing. Once the paint layer is scratched, the battery pack bottom guard plate 200 is prone to oxidation. In the embodiment of the present application, the protective coating 220 can be formed by spraying on the paint layer of the first surface 210a. The protective coating 220 can be a protective coating formed by polyvinyl chloride (PVC for short), and the protective coating 220 is consistent with the contour of the first surface 210a. The protective coating 220 can prevent the paint layer on the battery pack bottom guard plate 200 from being damaged by gravel.

[0119] Finally, the specific positions of the bottom guard plate 200 of the battery pack and the bottom plate 110 of the battery pack housing 100 are described.

[0120] Figure 12 This is a schematic structural diagram of the bottom guard plate of the battery pack and the bottom plate of the battery pack housing provided in the embodiment of the present application.

[0121] See Figure 12 As shown, the bottom plate 110 of the battery pack housing 100 contacts the first rib 211 and the boss 212.

[0122] The bottom plate 110 can be a metal plate, and the bottom plate 110 can also be a liquid cooling plate. The heat generated by the battery cell module can be discharged through the bottom plate 110. In the embodiment of the present application, the first rib 211 and the boss 212 contact the bottom plate 110. Thus, part of the heat can be discharged through the bottom guard plate 200 of the battery pack. Among them, only the first rib 211 is shown in Figure 12 In addition, the second rib 215 and the third rib 217 can also contact the bottom plate 110 to further improve the heat dissipation effect of the bottom guard plate 200 of the battery pack.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A bottom protection plate for a battery pack, characterized in that, Comprising: A plate body (210), the plate body (210) includes a first rib (211) and a boss (212), the first rib (211) includes at least two rib segments (2111) arranged at intervals in a first direction, and the boss (212) is arranged between adjacent rib segments (2111).

2. The bottom protection plate of the battery pack according to claim 1, characterized in that, The plate body (210) has a first surface (210a) and a second surface (210b) opposite to each other in the thickness direction, the second surface (210b) faces the battery pack housing (100), and a plurality of the first ribs (211) are arranged at intervals in a second direction on the second surface (210b), and / or a plurality of the bosses (212) are arranged at intervals in the second direction on the second surface (210b).

3. The battery pack bottom guard plate according to claim 2, wherein, The plate body (210) further includes a plurality of first grooves (213), the first grooves (213) are recessed from the first surface (210a) towards the second surface (210b) to form the first ribs (211) on the second surface (210b), and / or the plate body (210) further includes a plurality of second grooves (214), the second grooves (214) are recessed from the first surface (210a) towards the second surface (210b) to form the bosses (212) on the second surface (210b).

4. The battery pack bottom guard plate according to claim 3, wherein, The boss (212) includes an extension wall (2122) and a protruding wall (2123), the extension wall (2122) extends from the plate body (210) to the protruding wall (2123), and a first mounting hole (2121) is formed on the protruding wall (2123), and the first mounting hole (2121) penetrates the protruding wall (2123) in the thickness direction.

5. The battery pack bottom guard plate according to claim 3, characterized in that, The plate body (210) further includes at least one second rib (215), the second rib (215) extends from one end of the plate body (210) to the other end in the first direction, and the second rib (215) and the first rib (211) are arranged at intervals in the second direction.

6. The bottom protection plate of the battery pack according to claim 5, characterized in that, A third groove (216) extending in the first direction is formed on the first surface (210a), and the third groove (216) is recessed from the first surface (210a) towards the second surface (210b) to form the second rib (215) on the second surface (210b).

7. The bottom guard plate of the battery pack according to claim 6, characterized in that, The plate body (210) further includes a third rib (217), two ends of the third rib (217) are respectively connected to the first ribs (211) adjacent in the second direction, and / or two ends of the third rib (217) are respectively connected to the second ribs (215) adjacent in the second direction, and / or two ends of the third rib (217) are respectively connected to the first ribs (211) and the second ribs (215) adjacent in the second direction.

8. The battery pack bottom guard plate according to claim 7, wherein The first surface (210a) has a connecting groove (218) which is recessed from the first surface (210a) towards the second surface (210b) to form the third rib (217) on the second surface (210b), and the connecting groove (218) communicates with the first groove (213) or the third groove (216).

9. The battery pack bottom guard plate according to claim 8, wherein The width of the connecting groove (218) is smaller than the width of the first groove (213) or the third groove (216).

10. The battery pack bottom guard plate according to any one of claims 2 to 9, characterized in that It further includes a mounting edge (219) which is arranged around the peripheral side of the plate body (210). The mounting edge (219) is connected to the plate body (210), and the mounting edge (219) is located on the side of the second surface (210b) facing the battery pack housing (100) and is spaced from the plate body (210).

11. The battery pack bottom guard plate according to claim 10, characterized in that, The plate body (210) and the mounting edge (219) are connected with a fillet.

12. The battery pack bottom guard plate according to any one of claims 2 to 9, characterized in that, Along the second direction, the distance between the first rib (211) close to the edge of the plate body (210) and the edge of the plate body (210) is greater than or equal to the width of the first rib (211).

13. The battery pack bottom guard plate according to any one of claims 2 to 9, characterized in that, A protective coating (220) is provided on the first surface (210a).

14. A battery pack, characterized in that, It includes a battery pack housing (100), a battery cell module, and the battery pack bottom guard plate (200) according to any one of claims 1 to 13. The battery cell module is located in the battery pack housing (100), and the battery pack bottom guard plate (200) is installed at the bottom of the battery pack housing (100).

15. The battery pack according to claim 14, characterized in that, The battery pack housing (100) includes a bottom plate (110). The second surface (210b) of the battery pack bottom guard plate (200) faces the battery pack housing (100), and the bottom plate (110) contacts the first rib (211) and the boss (212) in the battery pack bottom guard plate (200).

16. A vehicle, characterized in that, It includes at least one battery pack (1000) according to claim 14 or 15.

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