Battery pack and vehicle

Abstract

The invention provides a battery pack and a vehicle, and belongs to the technical field of vehicle accessories. The battery pack comprises a battery assembly, a liquid cooling plate, a bottom protection plate and a sealing strip, wherein the battery assembly, the liquid cooling plate, the sealing strip and the bottom protection plate are arranged in sequence. The bottom protective plate comprises a protective part and a connecting part, and the connecting part is annular and surrounds the protective part. The sealing strip is annular and is fixed to the connecting part. The liquid cooling plate is fixed to the connecting part, and the sealing strip is located between the liquid cooling plate and the connecting part. The connecting part is provided with a plurality of flow guide grooves which surround the sealing strip, the flow guide grooves are provided with flow guide openings, and the flow guide openings penetrate through the outer wall of the connecting part. When accumulated water exists between the liquid cooling plate and the bottom protection plate, the flow guide grooves in the connecting part of the bottom protection plate can damage the capillary action of the accumulated water. The accumulated water can be discharged from the connecting part along the flow guide groove, so that the accumulated water can be quickly discharged between the bottom protection plate and the liquid cooling plate. Therefore, the liquid cooling plate and the bottom protection plate are not easy to corrode by accumulated water, so that the safety of the battery pack is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle accessories, and particularly to a battery pack and a vehicle. Background Art

[0002] Globally, efforts are being made to achieve green development of the economic society by reducing greenhouse gas emissions. In the automotive industry, this not only means restrictions on traditional fuel vehicles, but also promotes the rapid popularization of new energy vehicles, especially electric vehicles. As one of the core components of an electric vehicle, the safety design optimization of the battery pack is crucial for improving vehicle performance and ensuring driving safety.

[0003] The battery pack includes a battery assembly, a liquid cooling plate, a bottom guard plate, and a sealing strip. The battery assembly, the liquid cooling plate, the sealing strip, and the bottom guard plate are arranged in sequence. The sealing strip is annular and is located between the edge of the liquid cooling plate and the edge of the bottom guard plate, thus playing a sealing role.

[0004] However, in related technologies, in order to save the material cost of the sealing strip, the width of the sealing strip is designed to be a relatively narrow structure. Although such a design also meets the requirements of sealing and waterproofing, there will be a gap between the edge of the bottom guard plate and the liquid cooling plate outside the sealing strip. Due to the surface tension of water molecules, the gap will become a water storage space due to capillary action. The existence of this accumulated water will cause a slight corrosion effect on the bottom guard plate and the liquid cooling plate. Over time, it will lead to rusting of the bottom guard plate and the liquid cooling plate, thus reducing the safety of the battery pack. Summary of the Invention

[0005] The present disclosure provides a battery pack and a vehicle, which can solve the technical problems existing in related technologies. The technical solutions of the battery pack and the vehicle are as follows.

[0006] In a first aspect, the present disclosure provides a battery pack, which includes a battery assembly, a liquid cooling plate, a bottom guard plate, and a sealing strip. The battery assembly, the liquid cooling plate, the sealing strip, and the bottom guard plate are arranged in sequence;

[0007] The bottom guard plate includes a protection part and a connection part. The connection part is annular and surrounds the protection part. The sealing strip is annular and is fixed to the connection part. The liquid cooling plate is fixed to the connection part. The sealing strip is located between the liquid cooling plate and the connection part;

[0008] The connection part has a plurality of diversion grooves. The plurality of diversion grooves surround the sealing strip. The diversion groove has a diversion port, and the diversion port penetrates the outer wall of the connection part.

[0009] In a possible implementation manner, the connection part further has a plurality of mounting holes;

[0010] The liquid cooling plate and the connecting part are connected through the mounting holes, and there is at least one flow guiding groove between every two adjacent mounting holes.

[0011] In a possible implementation manner, there are 1-3 flow guiding grooves between every two adjacent mounting holes.

[0012] In a possible implementation manner, the distance between two opposite side walls of the flow guiding groove is 9 mm - 12 mm.

[0013] In a possible implementation manner, the outer side of the sealing strip has a plurality of flow guiding protrusions;

[0014] Each flow guiding protrusion has two flow guiding surfaces, and a flow guiding sharp angle is formed between the two flow guiding surfaces. The flow guiding sharp angle of each flow guiding protrusion faces a flow guiding groove.

[0015] In a possible implementation manner, the top end of the flow guiding sharp angle is aligned with one end of the flow guiding groove close to the sealing strip.

[0016] In a possible implementation manner, the flow guiding protrusion is in an isosceles triangle shape, and the flow guiding sharp angle is the apex angle of the isosceles triangle.

[0017] In a possible implementation manner, the vertex of the flow guiding sharp angle coincides with the axis of symmetry of the flow guiding groove.

[0018] In a possible implementation manner, the angle of the flow guiding sharp angle is 80° - 100°.

[0019] In a possible implementation manner, the thickness of the sealing strip before compression is 4 mm - 6 mm, and the width is 8 mm - 10 mm.

[0020] In a possible implementation manner, the thickness of the sealing strip before compression is 5 ± 0.05 mm, and the thickness of the sealing strip after compression is 3 ± 0.03 mm;

[0021] The width of the sealing strip before compression is 8 ± 0.1 mm, and the width of the sealing strip after compression is 10 ± 0.1 mm.

[0022] In a possible implementation manner, the bottom guard plate further includes a flow guiding part:

[0023] The flow guiding part is in a ring shape, the inner wall of the flow guiding part is connected to the outer wall of the connecting part, and the sealing strip, the connecting part and the flow guiding part are arranged in sequence from top to bottom.

[0024] In a possible implementation manner, the height difference between the flow guiding part and the connecting part is 1.2 mm - 2 mm.

[0025] In a possible implementation, the distance between the inner side and the outer side of the diversion part is 2 mm - 4 mm.

[0026] In a possible implementation, the material of the sealing strip 3 is foam.

[0027] In a possible implementation, the material of the bottom guard plate is metal, and the manufacturing process is cold stamping or hot stamping.

[0028] In a possible implementation, the material of the bottom guard plate is a composite material containing glass fiber, and the manufacturing process is molding.

[0029] In a second aspect, the present disclosure provides a vehicle, which includes the battery pack according to any one of claims 1 - 9.

[0030] The technical solution provided by the present disclosure at least includes the following beneficial effects:

[0031] The present disclosure provides a battery pack. When there is accumulated water between the liquid cooling plate and the bottom guard plate, the diversion grooves on the connecting part of the bottom guard plate can break the capillary action of the accumulated water, enabling the accumulated water to drain out from the connecting part along the diversion grooves, so that the accumulated water between the bottom guard plate and the liquid cooling plate can be quickly discharged. In this way, the liquid cooling plate and the bottom guard plate are not easily corroded by the accumulated water, thereby improving the safety of the battery pack.

[0032] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. In the drawings:

[0034] Figure 1 is a partial structural schematic diagram of a battery pack shown in an embodiment of the present disclosure;

[0035] Figure 2 is a partial exploded view of a battery pack shown in an embodiment of the present disclosure;

[0036] Figure 3 is a front view of a partial structural schematic diagram of a battery pack shown in an embodiment of the present disclosure;

[0037] Figure 4 is a partial structural schematic diagram of a bottom guard plate shown in an embodiment of the present disclosure;

[0038] Figure 5 is a partial structural schematic diagram of a sealing strip shown in an embodiment of the present disclosure;

[0039] Figure 6 It is a partial assembly drawing of a bottom guard plate and a sealing strip shown in an embodiment of the present disclosure;

[0040] Figure 7 It is the front view of a partial assembly drawing of a bottom guard plate and a sealing strip shown in an embodiment of the present disclosure;

[0041] Figure 8 It is the front view of a partial assembly drawing of a bottom guard plate and a sealing strip shown in an embodiment of the present disclosure;

[0042] Figure 9 It is a schematic diagram of the flow direction of accumulated water shown in an embodiment of the present disclosure.

[0043] Legend description:

[0044] 1. Liquid cooling plate;

[0045] 2. Bottom guard plate;

[0046] 21. Protection part;

[0047] 22. Connection part;

[0048] 22a. Mounting hole;

[0049] 220. Flow guiding groove;

[0050] 220a. Flow guiding port;

[0051] 23. Flow guiding part;

[0052] 3. Sealing strip;

[0053] 31. Flow guiding protrusion;

[0054] 311. Flow guiding surface;

[0055] 311a. Flow guiding sharp corner.

[0056] Through the above-mentioned drawings, the specific embodiments of the present disclosure have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present disclosure in any way, but to illustrate the concept of the present disclosure to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0057] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the drawings.

[0058] The terms used in the embodiments section of the present disclosure are only for explaining the embodiments of the present disclosure and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the field to which the present disclosure pertains. The words "first", "second", "third" and similar terms used in the specification and claims of the present patent application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not denote a quantity limitation, but mean that there is at least one. Words such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate relative position relationships, and when the absolute position of the object being described changes, the relative position relationships may also change accordingly.

[0059] Globally, it aims to achieve the green development of the economic society by reducing greenhouse gas emissions. In the automotive industry, this not only means restrictions on traditional fuel vehicles, but also promotes the rapid popularization of new energy vehicles, especially electric vehicles. As one of the core components of electric vehicles, the safety design optimization of the battery pack is crucial for improving vehicle performance and ensuring driving safety. The battery pack includes battery components, liquid cooling plates, bottom protection plates and sealing strips. The battery components, liquid cooling plates, sealing strips and bottom protection plates are arranged in sequence. The sealing strip is annular and is located between the edges of the liquid cooling plate and the bottom protection plate, thus playing a sealing role.

[0060] However, in the related art, in order to save the material cost of the sealing strip, the width of the sealing strip is designed to be a narrow structure. Although such a design also meets the requirements of sealing and waterproofing, there will be a gap between the edges of the bottom protection plate and the liquid cooling plate outside the sealing strip. Due to the surface tension of water molecules, the gap will become a water storage space due to capillary action. The existence of this accumulated water will cause a slight corrosion effect on the bottom protection plate and the liquid cooling plate, and over time, it will lead to the rusting of the bottom protection plate and the liquid cooling plate, thus reducing the safety of the battery pack.

[0061] In the related art, in order to avoid this situation, some solutions choose to increase the width of the sealing strip to completely fill the gap, but this will not only increase the material cost and process cost of the sealing strip, but also cause sealing failure in the area where the foam is perforated. Some solutions choose to abandon the use of the sealing strip and use sealant to achieve sealing, but this basically cuts off the possibility of later disassembly and inspection of the battery pack.

[0062] In view of the above technical problems, an embodiment of the present disclosure provides a battery pack. As Figures 1 - 3 shown, the battery pack includes a battery assembly (not shown in the figure), a liquid cooling plate, a bottom guard plate 2, and a sealing strip 3. The battery assembly, the liquid cooling plate, the sealing strip 3, and the bottom guard plate 2 are arranged in sequence. The bottom guard plate 2 includes a protection part 21 and a connection part 22. The connection part 22 is annular and surrounds the protection part 21. The sealing strip 3 is annular and fixed to the connection part 22. The liquid cooling plate is fixed to the connection part 22, and the sealing strip 3 is located between the liquid cooling plate and the connection part 22. As Figure 4 shown ( Figure 4 is Figure 3 a partial enlarged view of

[0063] ), the connection part 22 of the bottom guard plate 2 has a plurality of diversion grooves 220. The plurality of diversion grooves 220 surround the sealing strip 3. The diversion groove 220 has a diversion opening 120a, and the diversion opening 120a penetrates the outer wall of the connection part 22.

[0064] Among them, the liquid cooling plate 1 is used to cool down the battery assembly.

[0065] On the outer side of the sealing strip 3, a gap is formed between the edge of the liquid cooling plate and the edge of the bottom guard plate 2, and the diversion groove 220 is located at the gap.

[0066] The sealing strip 3 has elasticity. The material of the sealing strip 3 can be foam, and the manufacturing process is die-cutting.

[0067] In the technical solution provided by the embodiment of the present disclosure, when there is accumulated water between the liquid cooling plate and the bottom guard plate 2, the diversion grooves 220 on the connection part 22 of the bottom guard plate 2 can break the capillary action of the accumulated water, so that the accumulated water can be discharged from the connection part 22 along the diversion grooves 220, thereby enabling the accumulated water between the bottom guard plate 2 and the liquid cooling plate to be quickly discharged. In this way, the liquid cooling plate and the bottom guard plate are not easily corroded by the accumulated water, thereby improving the safety of the battery pack.

[0068] Next, an exemplary description of the implementation manner of the bottom guard plate 2 will be given.

[0069] In some examples, as Figure 4As shown, the connecting portion 22 also has a plurality of mounting holes 22a, and the liquid cooling plate and the connecting portion 22 are connected through the mounting holes 22a. Among them, the liquid cooling plate and the connecting portion 22 can be connected by bolts. It can be understood that the accumulated water between the edge of the liquid cooling plate and the edge of the bottom guard plate 2 will be located between two adjacent bolts. If there is no flow guiding groove 220 between two adjacent bolts, it is difficult to drain the accumulated water here, and it is also difficult for the accumulated water to bypass the bolts and flow to the drain grooves 120 located at other positions.

[0070] Therefore, at least one flow guiding groove 220 is provided between every two adjacent mounting holes 22a. That is, at least one flow guiding groove 220 is provided between every two adjacent bolts. In this way, the accumulated water between two adjacent bolts can be quickly drained through the flow guiding groove 220.

[0071] Exemplarily, the number of flow guiding grooves 220 between every two adjacent mounting holes 22a can be 1-3. Specifically, the number of flow guiding grooves 220 can be set according to the distance between every two adjacent mounting holes 22a. If the distance between every two adjacent mounting holes 22a is small, the number of flow guiding grooves 220 is set to be small. If the distance between every two adjacent mounting holes 22a is large, the number of flow guiding grooves 220 is set to be large. The embodiments of the present disclosure do not make specific limitations on this.

[0072] In some examples, the distance between the two opposite side walls of the flow guiding groove 220 is 9 mm - 12 mm. That is, the width of the flow guiding groove 220 is 9 mm - 12 mm. In this way, it can not only quickly drain the accumulated water between the edge of the liquid cooling plate and the edge of the bottom guard plate 2, but also prevent foreign objects from entering between the edge of the liquid cooling plate and the edge of the bottom guard plate 2 through the flow guiding groove 220.

[0073] If the width of the flow guiding groove 220 is too small, the speed of draining the accumulated water will be slow. If the width of the flow guiding groove 220 is too large, foreign objects are likely to enter the flow guiding groove 220, thereby causing damage to the liquid cooling plate, the bottom guard plate 2 and the sealing strip 3.

[0074] In some examples, as Figure 4 shown, the bottom guard plate 2 further includes a flow guiding portion 23. The flow guiding portion 23 is annular, the inner wall of the flow guiding portion 23 is connected to the outer wall of the connecting portion 22, and the sealing strip 3, the connecting portion 22 and the flow guiding portion 23 are arranged in sequence from top to bottom. The flow guiding portion 23 is lower than the connecting portion 22, and the flow guiding portion 23 and the connecting portion 22 directly form a stepped structure, which can enable the accumulated water to flow onto the flow guiding portion 23 through the flow guiding groove 220. The flow guiding portion 23 can play a role in guiding the accumulated water, making the accumulated water more evenly distributed on the flow guiding portion 23, and then flowing out from the flow guiding portion 23.

[0075] In some examples, the height difference between the diversion part 23 and the connection part 22 is 1.2 mm - 2 mm. If the height difference between the diversion part 23 and the connection part 22 is too large, it will cause the overall height of the battery pack to be relatively large. When the battery pack is installed at the bottom of the vehicle, the distance between the diversion part 23 and the ground will be relatively close, resulting in the diversion part 23 being easily collided by foreign objects during driving. Moreover, it will also make it easier for foreign objects to enter between the diversion part 23 and the liquid cooling plate 1, thus causing the diversion part 23 and the liquid cooling plate 1 to be easily damaged.

[0076] In some examples, the width of the diversion part 23, that is, the distance between the inner side and the outer side of the diversion part 23 is 2 mm - 4 mm. If the width of the diversion part 23 is too large, it will cause the width of the bottom guard plate 2 to be too large, which is not conducive to the layout of the battery pack in the vehicle. Moreover, if the width of the diversion part 23 is too large, on the one hand, it will make the time for accumulated water to flow out of the bottom guard plate 2 longer, which is not conducive to the rapid discharge of accumulated water. On the other hand, it may cause there to be more foreign objects between the diversion part 23 and the liquid cooling plate 1, thus causing the diversion part 23 and the liquid cooling plate 1 to be easily damaged.

[0077] In some examples, the diversion part 23 can be parallel to the connection part 22. Or, the diversion part 23 is arranged obliquely. Along the direction away from the connection part 22, the height of the diversion part 23 gradually decreases, so as to accelerate the drainage speed of the accumulated water.

[0078] In order to reduce the accumulated water between the edge of the bottom guard plate 2 and the edge of the liquid cooling plate, in addition to improving the structure of the bottom guard plate 2, the embodiments of the present disclosure also improve the structure of the sealing strip 3. Next, an exemplary description of the implementation manner of the sealing strip 3 will be given.

[0079] In order to enable the accumulated water between the edge of the bottom guard plate 2 and the edge of the liquid cooling plate to quickly flow to the diversion groove 220. The outer wall of the sealing strip 3 can be close to the diversion groove 220, for example, the outer wall of the sealing strip 3 is flush with the inner wall of the diversion groove 220. Thus, the accumulated water between the edge of the bottom guard plate 2 and the edge of the liquid cooling plate flows along the outer wall of the sealing strip 3 to the diversion groove 220.

[0080] However, this will make the width of the sealing strip 3 relatively wide, thus increasing the material cost and process cost of the sealing strip 3. Moreover, in order not to affect the bolt passing through the mounting hole on the connection part 22, holes also need to be drilled on the sealing strip 3, which will cause micro-cracks on the sealing strip 3, thus affecting the sealing effect of the sealing strip 3 and allowing water to enter between the protection part 21 and the liquid cooling plate.

[0081] For this reason, in some examples, as Figures 5 - 7 shown ( Figure 5 is Figure 3(partial enlarged view), the outer side of the sealing strip 3 has a plurality of flow guiding protrusions 31. Each flow guiding protrusion 31 has two flow guiding surfaces 311, and a formed between the two flow guiding surfaces 311. The flow guiding sharp corner 311a of each flow guiding protrusion 31 faces a flow guiding groove 220. The flow guiding surface 311 can guide the accumulated water, so that the accumulated water can flow to the flow guiding sharp corner 311a and then flow to the flow guiding groove 220. Thus, it flows out of the connecting part 22.

[0082] In this way, not only can the sealing strip 3 play a good role in guiding the flow, but also the material cost of the sealing strip 3 will not be increased too much. Moreover, since the width of the part of the sealing strip 3 other than the flow guiding protrusion 31 is relatively narrow, the sealing strip 3 does not need to be drilled to avoid bolts, thereby improving the structural strength of the sealing strip 3, and further improving the sealing strength between the connecting part 22 of the bottom guard plate 2 and the liquid cooling plate, making the battery pack have high reliability and safety.

[0083] In some examples, the thickness of the sealing strip 3 before compression is 4 mm - 6 mm, and the width is 8 mm - 10 mm. Among them, the width of the sealing strip 3 refers to the distance between the inner wall and the outer wall of the sealing strip 3 except for the flow guiding protrusion 31.

[0084] Exemplarily, the thickness of the sealing strip 3 before compression is 5 ± 0.05 mm, and the thickness after compression is 3 ± 0.03 mm. The width before compression is 8 ± 0.1 mm, and the width after compression is 10 ± 0.1 mm.

[0085] In some examples, as Figure 7 shown, the top of the flow guiding sharp corner 311a is aligned with one end of the flow guiding groove 220 close to the sealing strip 3. In this way, the accumulated water can flow directly to the flow guiding groove 220 along the flow guiding surface 311, so that the accumulated water can be quickly discharged.

[0086] In some other examples, the top of the flow guiding sharp corner 311a can also cross the inner wall of the flow guiding groove 220, so that the top of the flow guiding sharp corner 211 is located above the flow guiding groove 220, so that it can flow directly to the flow guiding groove 220 along the flow guiding surface 311, so that the accumulated water can be quickly discharged.

[0087] In some examples, as Figure 7 shown, the flow guiding protrusion 31 is an isosceles triangle, that is, the flow guiding surface 311 is a plane, and the flow guiding sharp corner 311a is the vertex angle of the isosceles triangle. In this way, the two flow guiding surfaces 311 of the flow guiding protrusion 31 can play a uniform role in guiding the accumulated water, so that the accumulated water on both sides of the flow guiding protrusion 31 can flow to the flow guiding gold corner 211a at the same time, and then flow to the flow guiding groove 220. Thus, it is avoided that there is less accumulated water on one side of the flow guiding protrusion 31 and more accumulated water on the other side.

[0088] Specifically, the angle bisector of the apex angle of the isosceles triangle coincides with the axis of symmetry of the diversion groove 220. That is, the vertex of the diversion sharp corner 311a coincides with the axis of symmetry of the diversion groove 220. Thus, the accumulated water on both sides of the diversion sharp corner 311a can symmetrically flow into the diversion groove 220.

[0089] It can be understood that the larger the angle of the diversion sharp corner 311a, the smaller the change in the flow direction of the accumulated water when flowing from near the diversion protrusion 31 to the diversion surface 311, which is more conducive to the diversion protrusion 31 guiding the water. However, if the diversion sharp corner 311a is too large, it will make it difficult to process the sealing strip 3. Therefore, in some examples, the angle of the diversion sharp corner 311a is set to 80° - 100°. In this way, the diversion protrusion 31 can not only play a good role in guiding the accumulated water, but also will not increase the processing difficulty of the sealing strip.

[0090] Exemplarily, the length of the diversion protrusion 31 is 4 mm - 6 mm. That is, the distance between the apex angle and the base of the isosceles triangle is 4 mm - 6 mm.

[0091] In some other examples, the diversion protrusion 31 can also be in other shapes. For example, the diversion surface 311 is designed as a convex surface or a concave surface (as Figure 8 shown), and the embodiments of the present disclosure do not make specific limitations thereto.

[0092] As Figure 9 shown ( Figure 9 the arrows in it are the flow directions of the accumulated water), when the bottom guard plate 2 includes a diversion portion 23, the accumulated water on the connecting portion 22 flows along the side wall of the sealing strip 3 to the diversion surface 311, then flows into the diversion groove 220, then flows from the diversion groove 220 to the diversion portion 23 of the bottom guard plate 2, and finally flows out of the bottom guard plate 2.

[0093] It should be noted that the number of the diversion protrusions 31 and the number of the diversion grooves 220 may be equal or not equal, and the embodiments of the present disclosure do not make specific limitations thereto.

[0094] The embodiments of the present disclosure also provide a vehicle, and the vehicle includes the above battery pack.

[0095] Among them, the vehicle is an electric vehicle, and the battery pack is fixed below the vehicle chassis.

[0096] For the vehicle provided by the embodiments of the present disclosure, since it is not easy for accumulated water to remain between the bottom guard plate 2 of the battery pack in the vehicle and the liquid cooling plate 1, it can prevent the liquid cooling plate and the bottom guard plate from being corroded by the accumulated water. Thus, the safety of the battery pack is improved, and further the safety and reliability of the vehicle are improved.

[0097] The above are only alternative embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A battery pack, characterized in that: The battery pack comprises a battery assembly, a liquid cooling plate, a bottom protective plate (2) and a sealing strip (3), wherein the battery assembly, the liquid cooling plate, the sealing strip (3) and the bottom protective plate (2) are arranged in sequence; The bottom guard plate (2) comprises a protective portion (21) and a connecting portion (22), the connecting portion (22) is annular and surrounds the protective portion (21), the sealing strip (3) is annular and is fixed to the connecting portion (22), the liquid cooling plate is fixed to the connecting portion (22), and the sealing strip (3) is located between the liquid cooling plate and the connecting portion (22); The connecting portion (22) has a plurality of guide grooves (220), the plurality of guide grooves (220) surround the sealing strip (3), the guide grooves (220) have a guide opening (220a), and the guide opening (220a) passes through the outer wall of the connecting portion (22).

2. The battery pack according to claim 1, characterized in that: The connecting portion (22) also has a plurality of mounting holes (22a); The liquid cooling plate and the connecting portion (22) are connected via the mounting holes (22a), and at least one guide groove (220) is provided between every two adjacent mounting holes (22a).

3. The battery pack according to claim 1, characterized in that: The distance between two opposite side walls of the guide groove (220) is 9 mm to 12 mm.

4. The battery pack according to claim 1, characterized in that: The outer side of the sealing strip (3) is provided with a plurality of flow-guiding protrusions (31); Each of the flow-guiding protrusions (31) has two flow-guiding surfaces (311), a flow-guiding sharp corner (311a) is formed between the two flow-guiding surfaces (311), and the flow-guiding sharp corner (311a) of each flow-guiding protrusion (31) is opposite to one of the flow-guiding grooves (220).

5. The battery pack according to claim 4, characterized in that: The top end of the guide angle (311a) is aligned with an end of the guide groove (220) close to the sealing strip (3).

6. The battery pack according to claim 4, characterized in that: The flow-guiding protrusion (31) is in the form of an isosceles triangle, and the flow-guiding sharp angle (311a) is the vertex angle of the isosceles triangle.

7. The battery pack according to claim 6, characterized in that: The angle of the diversion sharp angle (311a) is 80°-100°.

8. The battery pack according to claim 1, characterized in that: The bottom guard plate (2) further comprises a flow guide portion (23): The guide portion (23) is annular, the inner wall of the guide portion (23) is connected to the outer wall of the connecting portion (22), and the sealing strip (3), the connecting portion (22) and the guide portion (23) are arranged in sequence from top to bottom.

9. The battery pack according to claim 8, characterized in that: The height difference between the guide portion (23) and the connecting portion (22) is 1.2 mm to 2 mm.

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

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