Battery pack and vehicle

Abstract

A battery pack has a first direction, a second direction and a third direction which intersect in pairs. The battery pack comprises a battery case (10) and thermal management structures (20); the battery case (10) comprises a case body (11) and an upper cover (12), the case body (11) is connected to the upper cover (12) to form a mounting cavity, and the thermal management structures (20) are arranged in the mounting cavity; and each thermal management structure (20) comprises a cooling portion (21) and a first mounting portion (22), the cooling portion (21) is connected to the first mounting portion (22), and the first mounting portion (22) is connected to the upper cover (12). The cooling portions (21) of the thermal management structures (20) are connected to the first mounting portions (22), and the first mounting portions (22) are connected to the upper cover (12), so that after the battery pack is mounted in a vehicle body, the stress on the thermal management structures (20) may be directly transmitted to the vehicle body rather than being transmitted to the vehicle body by means of components such as a side frame of the battery pack, thereby improving the safety performance of the battery pack.

Description

Battery pack and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202411012039.5, filed on July 24, 2024, and entitled "Battery pack and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of batteries, and in particular relates to a battery pack and a vehicle. BACKGROUND

[0003] With the development of science and technology, vehicles have become an indispensable means of transportation for people's daily travel. Usually, a battery pack is installed in a vehicle to provide power for the vehicle, so that the vehicle can travel normally. In the related art, the battery pack is installed in the vehicle body of the vehicle, and the force of the battery pack is generally transmitted to the vehicle body through the side frame. However, according to such force transmission path, the safety performance of the battery pack is poor.

[0004] SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a battery pack and a vehicle, which can solve the problem of poor safety performance of the battery pack.

[0006] In a first aspect, the embodiments of the present application provide a battery pack, having a first direction, a second direction and a third direction intersecting with each other, the battery pack comprising: a battery box and a thermal management structure;

[0007] The battery box comprises a box body and an upper cover, the box body is connected with the upper cover and forms a mounting cavity, and the thermal management structure is arranged in the mounting cavity.

[0008] The thermal management structure comprises a cooling part and a first mounting part, the cooling part is connected with the first mounting part, and the first mounting part is connected with the upper cover.

[0009] Optionally, the number of the cooling parts is a plurality, the number of the first mounting parts is a plurality, the plurality of cooling parts are distributed along the first direction, the cooling parts are connected with the plurality of first mounting parts, and the first mounting parts on the same cooling part are arranged along the third direction.

[0010] Optionally, the battery pack further comprises a first fastener, the first mounting part is provided with a first connecting hole, the upper cover is provided with a second connecting hole, the first fastener is arranged in the first connecting hole and the second connecting hole and connects the upper cover and the first mounting part, and the first fastener protrudes from the upper cover along the second direction.

[0011] Optionally, the box has a bottom plate opposite the upper cover in the second direction, the cooling parts are multiple and are arranged in the first direction, at least two adjacent cooling parts are provided with at least one first mounting part, the first mounting part extends in the second direction and connects the cooling part and the upper cover.

[0012] Optionally, the first mounting part is connected with the upper cover and the bottom plate at both ends in the second direction, respectively.

[0013] Optionally, the battery pack further comprises a second fastener, the first mounting part is provided with a first connecting hole, the upper cover is provided with a second connecting hole, and the second fastener is arranged through the first connecting hole and the second connecting hole to connect the first mounting part and the upper cover.

[0014] Optionally, the battery pack further comprises a second fastener, the first mounting part is provided with a first connecting hole, the upper cover is provided with a second connecting hole, and the second fastener is arranged through the first connecting hole and the second connecting hole to connect the first mounting part and the upper cover.

[0015] Optionally, the first mounting part and the upper cover are connected by adhesive.

[0016] Optionally, the thermal management structure further comprises a second mounting part, the box has a bottom plate opposite the upper cover in the second direction, the cooling part has opposite first and second ends in the second direction, the first mounting part is connected with the first end and the upper cover, respectively, and the second mounting part is connected with the second end and the bottom plate, respectively.

[0017] Optionally, the battery pack further comprises a fourth fastener, and the second mounting part is connected with the bottom plate by the fourth fastener.

[0018] Optionally, the cooling part has opposite first and second side plates in the first direction, and a plurality of reinforcing plates are arranged in the second direction in the cooling part, and the plurality of reinforcing plates are connected with the first and second side plates in the first direction, respectively.

[0019] The first mounting part is connected with the first and second side plates, respectively.

[0020] Optionally, the battery pack further comprises a plurality of battery monomers, the number of the cooling parts is multiple and is arranged in the first direction, and at least one battery monomer is arranged between two adjacent cooling parts in the first direction, and the battery monomer is connected with the cooling part.

[0021] Optionally, the surface with the largest area of ​​the battery cell is connected to the cooling section.

[0022] Optionally, the battery pack further includes multiple liquid cooling plates and multiple battery cells. The number of cooling sections is multiple, and the multiple cooling sections are distributed at intervals along a first direction. Along the first direction, at least one liquid cooling plate is disposed between two adjacent cooling sections, and at least one battery cell is disposed between at least partially adjacent cooling sections and liquid cooling plates. The liquid cooling plates are spaced apart from the top cover.

[0023] Optionally, along the first direction, the thickness of the liquid cooling plate is less than the thickness of the cooling section.

[0024] Optionally, the first mounting part includes a first connecting plate, a second connecting plate, and a third connecting plate. The first connecting plate and the second connecting plate are spaced apart along a first direction, and the first connecting plate and the second connecting plate are respectively connected to the cooling part. The third connecting plate is located between the first connecting plate and the second connecting plate, and the third connecting plate is connected to both the first connecting plate and the second connecting plate. The third connecting plate is also connected to the upper cover.

[0025] Optionally, the battery pack further includes multiple battery cells, which are disposed in the mounting cavity and connected to the cooling section, and are spaced apart from the housing.

[0026] Optionally, the cooling section and the first mounting section are integrally formed.

[0027] Secondly, embodiments of this application provide a vehicle, the vehicle including a bottom bracket and a battery pack as described in any one of the first aspects above, wherein the first mounting portion penetrates the top cover and is connected to the bottom bracket.

[0028] In this embodiment, since the housing and the top cover are connected, they form an installation cavity, allowing a thermal management structure to be installed within it. Because the thermal management structure includes a cooling section connected to a first mounting section, and the first mounting section is connected to the top cover, when the battery pack is installed in the vehicle body, the force on the thermal management structure inside the battery pack can be directly transmitted to the top cover, and then to the vehicle body, or the force on the thermal management structure inside the battery pack can be directly transmitted to the vehicle body. That is, in this embodiment, by connecting the cooling section of the thermal management structure in the battery pack to the first mounting section, and the first mounting section to the top cover, after the battery pack is installed in the vehicle body, once the thermal management structure inside the battery pack is subjected to force, the force can be directly transmitted to the vehicle body, avoiding transmission through components such as the side frame of the battery pack, thereby improving the safety performance of the battery pack.

[0029] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application, the present application can be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 shows an exploded view of a battery pack according to an embodiment of the present application;

[0031] Fig. 2 shows a schematic view of a cooling part and a liquid cooling plate distribution according to an embodiment of the present application;

[0032] Fig. 3 shows a schematic view of a thermal management structure according to an embodiment of the present application;

[0033] Fig. 4 shows a cross-sectional view of a thermal management structure according to an embodiment of the present application;

[0034] Fig. 5 shows a cross-sectional view of a battery pack according to an embodiment of the present application;

[0035] Fig. 6 shows an enlarged view of a part A in Fig. 5;

[0036] Fig. 7 shows a cross-sectional view of a part of a battery pack according to an embodiment of the present application;

[0037] Fig. 8 shows a cross-sectional view of a part of a thermal management structure according to an embodiment of the present application;

[0038] Fig. 9 shows a cross-sectional view of a battery pack according to an embodiment of the present application;

[0039] Fig. 10 shows a schematic view of a cooling part according to an embodiment of the present application;

[0040] Fig. 11 shows a schematic view of a vehicle according to an embodiment of the present application.

[0041] Reference signs: 10: battery box; 20: thermal management structure; 30: first fastener; 40: second fastener; 50: second mounting part; 60: liquid cooling plate; 11: box body; 12: upper cover; 21: cooling part; 22: first mounting part; 100: battery monomer; 111: bottom plate; 121: second connecting hole; 211: first side plate; 212: second side plate; 213: reinforcing plate; 221: first connecting hole; 1111: third connecting hole; 2201: first connecting plate; 2202: second connecting plate; 2203: third connecting plate; 200: bottom support. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described in the description of the embodiments of the present application in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0043] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0044] The term "parallel" in the present application not only includes the case of absolute parallel, but also includes the case of approximate parallel in the general understanding of engineering, such as "parallel" refers to the angle formed by a straight line and a straight line, a straight line and a surface, or a surface and a surface is-1°~1° state; at the same time, "perpendicular" also not only includes the case of absolute perpendicular, but also includes the case of approximate perpendicular in the general understanding of engineering, such as "perpendicular" refers to the angle formed by a straight line and a straight line, a straight line and a surface, or a surface and a surface is 89°~91° state. The equal distance or the equal angle not only includes the case of absolute equality, but also includes the case of approximate equality in the general understanding of engineering, that is, there can be a certain error, such as the state of tolerance range in-1%~1%.

[0045] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] As shown in FIGS. 1-10, the battery pack has a first direction, a second direction and a third direction intersecting with each other, preferably, the first direction, the second direction and the third direction are perpendicular to each other, in particular, the first direction can be a length direction of the battery pack, the second direction can be a height direction of the battery pack, and the third direction can be a width direction of the battery pack, the battery pack comprises a battery box 10 and a thermal management structure 20.

[0048] The battery box 10 comprises a box body 11 and an upper cover 12, the box body 11 is connected with the upper cover 12 and forms a mounting cavity, and the thermal management structure 20 is arranged in the mounting cavity. The thermal management structure 20 comprises a cooling part 21 and a first mounting part 22, the cooling part 21 is connected with the first mounting part 22, and the first mounting part 22 is connected with the upper cover 12.

[0049] In the embodiment of the present application, since the box body 11 is connected with the upper cover 12, the box body 11 and the upper cover 12 can form the mounting cavity, so that the thermal management structure 20 can be arranged in the mounting cavity. Since the cooling part 21 of the thermal management structure 20 is connected with the first mounting part 22, and the first mounting part 22 is connected with the upper cover 12, when the battery pack is installed in the vehicle body, the force borne by the thermal management structure 20 in the battery pack can be directly transmitted to the upper cover 12 and then to the vehicle body, that is, the force borne by the thermal management structure 20 in the battery pack can be directly transmitted to the vehicle body. That is, in the embodiment of the present application, by connecting the cooling part 21 of the thermal management structure 20 with the first mounting part 22 in the battery pack, and connecting the first mounting part 22 with the upper cover 12, the force borne by the thermal management structure 20 in the battery pack can be directly transmitted to the vehicle body after the battery pack is installed in the vehicle body, which can be the gravity of the thermal management structure 20 itself or the gravity of other structures connected with the thermal management structure 20, thereby avoiding the force being transmitted to the vehicle body through the side frame and other components of the battery pack, so that the safety performance of the battery pack can be improved.

[0050] In some embodiments, the cooling part 21 and the first mounting part 22 are integrally formed, so as to improve the structural reliability of the thermal management structure 20.

[0051] In addition, in the embodiment of the present application, the first mounting portion 22 of the heat management structure 20 inside the battery pack is connected with the upper cover 12, and the heat management structure 20 functions as a beam inside the battery pack, that is, the heat management structure 20 can have the functions of heat dissipation and mounting, so that the beam inside the battery pack can be avoided, that is, the internal beam structure inside the battery pack can be saved, so that more battery monomers 100 can be accommodated inside the battery pack, the internal volume utilization rate of the battery pack is effectively improved, and the energy density of the battery pack is also improved. In addition, the first mounting portion 22 of the heat management structure 20 of the battery pack is connected with the upper cover 12, which can also increase the structural strength of the battery pack, thereby improving the safety performance of the battery pack.

[0052] In some embodiments, the battery pack further comprises a plurality of battery monomers 100, the number of cooling portions 21 is multiple and is spaced apart along the first direction, at least one battery monomer 100 is arranged between adjacent two cooling portions 21, the battery monomer 100 is connected with the cooling portion 21, so that the stress of the battery monomer 100 is conducted to the first mounting portion 22 through the cooling portion 21, and then to the vehicle body, further improving the structural strength and safety performance of the battery pack. Wherein, the battery monomer 100 can be connected with the cooling portion 211 through heat-conducting adhesive.

[0053] In some embodiments, the largest surface of the battery monomer 100 is connected with the cooling portion 21. Through such a setting, the cooling portion 21 is connected with the largest surface of the battery monomer 100, so that the heat of the battery monomer 100 can be more transferred to the cooling portion 21, so that the cooling effect of the cooling portion 21 on the monomer battery 100 is better, and the fixing effect of the monomer battery 100 and the cooling portion 21 is also better, further improving the structural strength and safety performance of the battery pack.

[0054] In addition, in some embodiments, the number of cooling portions 21 can be multiple, the number of first mounting portions 22 can be multiple, the plurality of cooling portions 21 are spaced apart along the first direction, the cooling portion 21 is connected with the plurality of first mounting portions 22, and the first mounting portions 22 on the same cooling portion 21 are spaced apart along the third direction.

[0055] Through such a setting, when the cooling portion 21 needs to be connected with the upper cover 12 through the first mounting portion 22, the plurality of first mounting portions 22 can be connected with the upper cover 12 at the same time, so that the cooling portion 21 is connected with the upper cover 12 through the first mounting portion 22 more firmly, and the heat management structure 20 is more stable inside the battery pack and is not easy to shake.

[0056] It should be noted that the cooling part 21 has opposite ends in the second direction, and the first mounting part 22 can be arranged at one end of the cooling part 21, and in the third direction, the first mounting part 22 is arranged at intervals at one end of the cooling part 21. In addition, in the embodiment of the present application, the same cooling part 21 is connected with multiple first mounting parts 22. For example, two first mounting parts 22 are connected to the same cooling part 21, and for another example, four first mounting parts 22 are connected to the same cooling part 21. The number of first mounting parts 22 connected to the same cooling part 21 is not limited in the embodiment of the present application.

[0057] In addition, in some embodiments, the battery pack can further include a first fastener 30, the first mounting part 22 is provided with a first connecting hole 221, the upper cover 12 is provided with a second connecting hole 121, the first fastener 30 is arranged in the first connecting hole 221 and the second connecting hole 121 and connects the upper cover 12 and the first mounting part 22, and the first fastener 30 protrudes from the upper cover 12 in the second direction.

[0058] Through such an arrangement, when it is necessary to connect the first mounting part 22 and the upper cover 12, the first fastener 30 can be directly arranged in the first connecting hole 221 of the first mounting part 22 and the second connecting hole 121 of the upper cover 12, so that the first fastener 30 can connect the upper cover 12 and the first mounting part 22, that is, the first fastener 30 connects the upper cover 12 and the cooling part 21. In addition, by arranging the first fastener 30, the upper cover 12 and the cooling part 21 can be conveniently connected. In addition, the first fastener 30 protrudes from the upper cover 12 in the second direction, so that when the battery pack is installed in the vehicle body, the part of the first fastener 30 protruding from the upper cover 12 can be connected with the vehicle body, thereby facilitating the fixation of the battery pack in the vehicle body.

[0059] It should be noted that the first fastener 30 can be a bolt, and of course, the first fastener 30 can also be other components with connecting and fastening functions, for example, the first fastener 30 is a pin. The specific type and number of the first fastener 30 are not limited in the embodiment of the present application.

[0060] In the embodiment of the present application, one cooling part 21 is connected with one first mounting part 22, and multiple first connecting holes 221 can be arranged on one first mounting part 22. The first fastener 30 can have multiple first connecting holes 221, and one first connecting hole 221 is connected with one first fastener 30.

[0061] In addition, in the embodiment of the present application, the first connecting hole 221 on the first mounting part 22 can be opposite to the second connecting hole 121 on the upper cover 12, and the number of the first connecting hole 221 is equal to the number of the second connecting hole 121, so that the first fastener 30 can be arranged in the first connecting hole 221 and the second connecting hole 121 at the same time.

[0062] In addition, in some embodiments, the thermal management structure 20 can further include a second mounting portion 50, the box 11 has a bottom plate 111 opposite to the upper cover 12 in the second direction, the cooling portion 21 has opposite first and second ends in the second direction, the first mounting portion 22 is connected with the first end and the upper cover 12 respectively, and the second mounting portion 50 is connected with the second end and the bottom plate 111 respectively.

[0063] Through such an arrangement, it is equivalent that the opposite first and second ends of the cooling portion 21 are connected with the first and second mounting portions 22 and 50 respectively in the second direction, the first mounting portion 22 is connected with the upper cover 12, and the second mounting portion 50 is connected with the bottom plate 111, so that it is equivalent that the cooling portion 21 is connected with the upper cover 12 and the bottom plate 111 respectively, and the cooling portion 21 is fixed more firmly inside the battery pack.

[0064] In some embodiments, the battery cell 100 is arranged spaced apart from the box 11. Specifically, the battery cell 100 can be arranged spaced apart from the bottom plate 111, or the box 11 can further have a side plate connected with the bottom plate 111, and the battery cell 100 is arranged spaced apart from the side plate. In this way, the weight of the battery cell 100 can be directly transmitted to the upper cover 12, thereby improving the safety of the battery pack.

[0065] In some embodiments, the battery cell 100 has a pole, and the pole is arranged on the side of the battery cell 100 away from the upper cover 12, so that the distance between the battery cell 100 and the box 11 can serve as a space for arranging the pole, thereby improving the volume utilization rate of the battery pack.

[0066] In other embodiments, the battery cell 100 has an explosion-proof valve arranged on the side of the battery cell 100 away from the upper cover 12, so that when the battery cell 100 sprays the valve, the high-temperature fluid can be sprayed away from the upper cover 12, thereby improving the safety of the battery pack.

[0067] In addition, in some embodiments, the battery pack further includes a fourth fastener 90, and the second mounting portion 50 is connected with the bottom plate 111 through the fourth fastener 90. Through such an arrangement, when the second mounting portion 50 needs to be connected with the bottom plate 111, the second mounting portion 50 and the bottom plate 111 can be directly connected through the fourth fastener 90, thereby facilitating the connection of the second mounting portion 50 and the bottom plate 111.

[0068] It should be noted that the bottom plate 111 can be provided with a through hole, and the second mounting portion 50 can be provided with a connecting hole corresponding to the through hole on the bottom plate 111, so that the fourth fastener 90 can be directly arranged through the through hole on the bottom plate 111 and the connecting hole on the second mounting portion 50, thereby connecting the second mounting portion 50 and the bottom plate 111. The fourth fastener 90 can be a bolt, and of course, the fourth fastener 90 can also be other types of components, for example, the fourth fastener 90 is a pin. For this, the embodiments of the present application are not limited here.

[0069] In addition, in some embodiments, the box body 11 can have a bottom plate 111 opposite the position of the upper cover 12 in the second direction, the cooling portion 21 has a plurality of and is arranged in the first direction, at least one first mounting portion 22 is arranged between at least two adjacent cooling portions 21, the first mounting portion 22 extends in the second direction and connects the cooling portion 21 and the upper cover 12. Among them, the number of first mounting portions 22 is multiple, the number of cooling portions 21 is twice the number of first mounting portions 22, and it can be that every two cooling portions 21 form a group, and one first mounting portion 22 is arranged between the adjacent two cooling portions 21 in the same group.

[0070] Through such an arrangement, it is equivalent to arranging the cooling portion 21 in the direction of the cooling portion 21, that is, in the first direction, at least one first mounting portion 22 is arranged between the adjacent two cooling portions 21, and the first mounting portion 22 is connected with the cooling portion 21, so that in the second direction, the two ends of the first mounting portion 22 can be connected with the upper cover 12 and the bottom plate 111 respectively, which is equivalent to that the cooling portion 21 is connected with the upper cover 12 and the bottom plate 111 through the first mounting portion 22, thereby making the cooling portion 21 fixed in the battery pack more stable. In addition, the first mounting portion 22 arranged between the adjacent two cooling portions 21 can also make the size of the battery pack inside in the second direction smaller, which is beneficial to reduce the size of the battery pack in the second direction, thereby reducing the chassis height when the battery pack is assembled on the vehicle, and improving the passability of the vehicle.

[0071] In addition, in the embodiments of the present application, the first mounting portion 22 and the cooling portion 21 can be an integral molding structure, that is, in the production process, the first mounting portion 22 and the cooling portion 21 are directly produced by casting process. Of course, the first mounting portion 22 and the cooling portion 21 can also be connected by welding process, that is, the cooling portion 21 and the first mounting portion 22 are respectively produced, and then the first mounting portion 22 and the cooling portion 21 are welded. For this, the embodiments of the present application are not limited here.

[0072] In addition, in the embodiments of the present application, the first mounting portion 22 has two ends connected to the upper cover 12 and the bottom plate 111 along the second direction. That is, one end of the first mounting portion 22 is connected to the upper cover 12, and the other end of the first mounting portion 22 is connected to the bottom plate 111, so that the first mounting portion 22 is more firmly connected to the upper cover 12 and the bottom plate 111.

[0073] In addition, in some embodiments, the battery pack further includes a second fastener 40, the first mounting portion 22 is provided with a first connecting hole 221, the upper cover 12 is provided with a second connecting hole 121, and the second fastener 40 is arranged through the first connecting hole 221 and the second connecting hole 121 to connect the first mounting portion 22 and the upper cover 12.

[0074] Through the above arrangement, when it is required to connect the first mounting portion 22 and the upper cover 12, the second fastener 40 can be arranged through the first connecting hole 221 on the first mounting portion 22 and the second connecting hole 121 on the upper cover 12, so that the second fastener 40 can connect the first mounting portion 22 and the upper cover 12, that is, the second fastener 40 connects the cooling portion 21 and the upper cover 12. In addition, by arranging the second fastener 40, the cooling portion 21 and the upper cover 12 can be conveniently connected, and the use of parts is reduced. In addition, the second fastener 40 can protrude from the upper cover 12 along the second direction, so that when the battery pack is installed in the vehicle body, the part of the second fastener 40 protruding from the upper cover 12 can be connected to the vehicle body, thereby facilitating the fixation of the battery pack in the vehicle body.

[0075] In addition, in some embodiments, the battery pack can further include a second fastener 40, the first mounting portion 22 is provided with a first connecting hole 221, the upper cover 12 is provided with a second connecting hole 121, and the bottom plate 111 is provided with a third connecting hole 1111, and the second fastener 40 is arranged through the first connecting hole 221, the second connecting hole 121 and the third connecting hole 1111 to connect the first mounting portion 22 and the upper cover 12 and the bottom plate 111.

[0076] Through the arrangement, when the first mounting portion 22 needs to be connected with the upper cover 12 and the bottom plate 111 respectively, the second fastener 40 can be directly arranged through the third connecting hole 1111 on the bottom plate 111, the first connecting hole 221 on the first mounting portion 22 and the second connecting hole 121 on the upper cover 12, so that the second fastener 40 can connect the bottom plate 111, the first mounting portion 22 and the upper cover 12, that is, the second fastener 40 connects the cooling portion 21 with the upper cover 12 and the bottom plate 111 respectively. In addition, the second fastener 40 can be conveniently arranged to connect the cooling portion 21 with the upper cover 12 and the bottom plate 111, and the use of parts is reduced. In addition, the second fastener 40 can protrude from the upper cover 12 in the second direction, so that when the battery pack is installed in the vehicle body, the part of the second fastener 40 protruding from the upper cover 12 can be connected with the vehicle body, and the battery pack can be fixed in the vehicle body.

[0077] It should be noted that the second fastener 40 can be a bolt, and of course, the second fastener 40 can also be other parts having the functions of connection and fastening, for example, the second fastener 40 is a pin. The specific type of the second fastener 40 is not limited in the embodiment of the application.

[0078] In addition, in some embodiments, the first mounting portion 22 is connected with the upper cover 12 by adhesive. Through the arrangement, when the first mounting portion 22 needs to be connected with the upper cover 12, the first mounting portion 22 and the upper cover 12 can be directly connected by the adhesive, and the connection of the first mounting portion 22 and the upper cover 12 is facilitated. In addition, when the first connecting hole 221 is arranged on the first mounting portion 22, the second connecting hole 121 is arranged on the upper cover 12, and the first fastener 30 is arranged through the first connecting hole 221 and the second connecting hole 121, the adhesive can also be arranged between the first mounting portion 22 and the upper cover 12 at the same time, so that the first mounting portion 22 is connected with the upper cover 12 by the first fastener 30 on one side and by the adhesive on the other side, and the connection of the first mounting portion 22 and the upper cover 12 is more firm. The adhesive can be waterproof glue, so that after the first mounting portion 22 and the upper cover 12 are connected by the adhesive, the liquid outside the battery can also be prevented from entering the inside of the battery pack due to the waterproof glue, and the connection between the upper cover 12 and the first mounting portion 22 has a certain waterproof performance.

[0079] In addition, in some embodiments, the cooling part 21 has opposite first side plates 211 and second side plates 212 in the first direction, a plurality of reinforcing plates 213 are arranged in the second direction and connected to the first side plates 211 and the second side plates 212 in the first direction, respectively; the first mounting part 22 is connected to the first side plates 211 and the second side plates 212, respectively. At this time, it can be understood that the first mounting part 22 is arranged in the second direction with the cooling part 21. Through such an arrangement, in the second direction, a flow channel is formed between two adjacent reinforcing plates 213, so that the cooling liquid can flow between the flow channels, and the reinforcing plates 213 are connected to the second side plates 212 in the first direction, respectively, so that the reinforcing plates 213 can strengthen the strength of the cooling part 21, so that the strength of the cooling part 21 is greater.

[0080] It should be noted that in some embodiments, the first mounting part 22 is located outside the cooling part 21, and the first mounting part 22 can be connected to the same end of the first side plates 211 and the second side plates 212 in the second direction. By additionally arranging the first mounting part 22 outside the cooling part 21, the upper cover is connected by the first mounting part 22, so that there is enough space for the cooling medium to flow in the cooling part 21, and at the same time, the weight of the cooling part 21 can be transmitted to the upper cover through the first mounting part 22.

[0081] In addition, in some embodiments, the battery pack further comprises a plurality of liquid cooling plates 60 and a plurality of battery monomers 100, the number of cooling parts 21 is a plurality, and the plurality of cooling parts 21 are arranged in the first direction. In the first direction, at least one liquid cooling plate 60 is arranged between two adjacent cooling parts 21, and at least one battery monomer 100 is arranged between at least some adjacent cooling parts 21 and the liquid cooling plate 60. In this embodiment, a plurality of liquid cooling plates 60 and a plurality of cooling parts 21 can be alternately arranged in the first direction, or two cooling parts 21 can be a group, and the cooling parts 21 are arranged in groups with the liquid cooling plate 60.

[0082] Through such an arrangement, in the battery pack, not only the battery monomers 100 inside the battery pack can be cooled by the cooling part 21, but also the battery monomers 100 inside the battery pack can be cooled by the liquid cooling plate 60, that is, in the battery pack, the battery monomers 100 can be cooled by heat transfer by the cooling part 21 and the liquid cooling plate 60, so that the cooling efficiency of the battery monomers 100 in the battery pack is improved. It can be understood that in this embodiment, the cooling part 21 and the liquid cooling plate 60 are different from the first mounting part 22, and the rest of the structure can be the same. The cooling part 21 and the liquid cooling plate 60 can jointly constitute a thermal management system of the battery pack.

[0083] In addition, in some embodiments, the battery pack further comprises a plurality of battery cells 100, and the plurality of thermal management structures 20 are spaced apart along the first direction, and the plurality of battery cells 100 are arranged between any two adjacent thermal management structures 20; and the battery cells 100 are bonded to the cooling portions 21. In this way, once the battery cells 100 generate heat, the heat of the battery cells 100 can be transferred to the cooling portions 21, and the cooling portions 21 can cool the battery cells 100, thereby avoiding the problem of high temperature of the battery cells 100 and high temperature of the battery pack.

[0084] It should be noted that the battery cells 100 can also be bonded to the liquid cooling plates 60, that is, when the plurality of liquid cooling plates 60 and the plurality of cooling portions 21 are alternately distributed along the first direction, the battery cells 100 are arranged between the cooling portions 21 and the liquid cooling plates 60, and the battery cells 100 are bonded to the liquid cooling plates 60 and the cooling portions 21, respectively. In addition, when at least one liquid cooling plate 60 is arranged between any two adjacent cooling portions 21, if one liquid cooling plate 60 is arranged between any two adjacent cooling portions 21, battery cells 100 are arranged between the liquid cooling plate 60 and the cooling portions 21, and if at least two liquid cooling plates 60 are arranged between any two adjacent cooling portions 21, battery cells 100 are arranged between adjacent liquid cooling plates 60, and battery cells 100 are arranged between the liquid cooling plates 60 and the cooling portions 21.

[0085] In addition, in some embodiments, along the first direction, the thickness of the liquid cooling plate 60 is less than the thickness of the cooling portion 21. Since the first mounting portion 22 is connected to the cooling portion 21, the cooling portion 21 needs to play a role of bearing, so the thickness of the cooling portion 21 is large, while the liquid cooling plate 60 only needs to play a role of heat transfer, so the thickness of the liquid cooling plate 60 can be small, thereby improving the volume utilization rate inside the battery pack, and also facilitating the lightweight of the battery pack.

[0086] It should be noted that the thickness of the liquid cooling plate 60 is the distance between the two opposite surfaces of the liquid cooling plate 60 along the first direction, and the thickness of the cooling portion 21 is the distance between the two opposite outer surfaces of the cooling portion 21 along the first direction.

[0087] In addition, in some embodiments, the first mounting portion 22 includes a first connecting plate 2201, a second connecting plate 2202, and a third connecting plate 2203. The first connecting plate 2201 and the second connecting plate 2202 are spaced apart along the first direction, and the first connecting plate 2201 and the second connecting plate 2202 are connected to the cooling portion 21. The third connecting plate 2203 is located between the first connecting plate 2201 and the second connecting plate 2202, and the third connecting plate 2203 is connected to the first connecting plate 2201 and the second connecting plate 2202, respectively. The third connecting plate 2203 is connected to the upper cover 12. Through such a design, the third connecting plate 2203 can be directly connected to the upper cover 12, and the third connecting plate 2203 is connected to the second connecting plate 2202 and the first connecting plate 2201, respectively. Therefore, once the third connecting plate 2203 is connected to the upper cover 12, the first connecting plate 2201 and the second connecting plate 2202 are equivalent to being connected to the upper cover 12. The first connecting plate 2201 and the second connecting plate 2202 are connected to the cooling portion 21, so that once the third connecting plate 2203 is connected to the upper cover 12, the cooling portion 21 can be connected to the upper cover 12.

[0088] It should be noted that in the embodiments of the present application, the structure of the second mounting portion 50 can be the same as that of the first mounting portion 22, that is, the second mounting portion 50 is symmetrical to the first mounting portion 22 with respect to the cooling portion 21.

[0089] In the embodiments of the present application, since the box body 11 is connected to the upper cover 12, the box body 11 and the upper cover 12 can form a mounting cavity, so that the thermal management structure 20 can be arranged in the mounting cavity. Since the cooling portion 21 of the thermal management structure 20 is connected to the first mounting portion 22, and the first mounting portion 22 is connected to the upper cover 12, when the battery pack is installed in the vehicle body of the vehicle, the force received by the thermal management structure 20 inside the battery pack can be directly transmitted to the upper cover 12 and then to the vehicle body through the upper cover 12, that is, the force received by the thermal management structure 20 inside the battery pack can be directly transmitted to the vehicle body. That is, in the embodiments of the present application, by connecting the cooling portion 21 of the thermal management structure 20 in the battery pack to the first mounting portion 22, and connecting the first mounting portion 22 to the upper cover 12, once the thermal management structure 20 inside the battery pack is stressed after the battery pack is installed in the vehicle body, the stress of the thermal management structure 20 can be directly transmitted to the vehicle body, avoiding being transmitted to the vehicle body through the side frame and other components of the battery pack, thereby improving the safety performance of the battery pack.

[0090] The embodiments of the present application provide a vehicle, as shown in FIG. 11, which includes a bottom support 200 and a battery pack in any of the above embodiments. The upper cover 12 is connected to the bottom support 200.

[0091] In some embodiments, the first mounting portion 22 penetrates the upper cover 12 and is connected with the bottom bracket 200, so as to directly transmit the force of the thermal management structure 20 to the bottom bracket 200.

[0092] In some other embodiments, the upper cover 12 is connected with the bottom bracket 200, and the first mounting portion 22 penetrates the upper cover 12 and is connected with the bottom bracket 200, so as to increase the connection reliability of the battery pack and the bottom bracket 200.

[0093] It should be noted that, in the embodiments of the present application, the upper cover 12 of the battery pack can serve as the floor of the vehicle body when the battery pack is installed in the vehicle body.

[0094] It should be noted that, each of the embodiments in the present specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0095] Although the alternative embodiments of the embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic creative concept. Therefore, the appended claims are intended to cover the alternative embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

[0096] Finally, it should be noted that, in the present specification, the relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply that there is any such actual relationship or order between the entities. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such article or terminal device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another same element in the article or terminal device including the element.

[0097] The above describes the technical solutions provided by the present application in detail, and the principles and implementation manners of the present application are described by using specific examples. Meanwhile, for those skilled in the art, according to the principles and implementation manners of the present application, the specific implementation manners and application ranges will be changed, and the content of the present specification should not be understood as a limitation of the present application.

Claims

1. A battery pack having a first direction, a second direction, and a third direction that each intersect one another, wherein, The battery pack comprises a battery box and a thermal management structure; The battery box comprises a box body and an upper cover, the box body is connected with the upper cover and forms a mounting cavity, and the thermal management structure is arranged in the mounting cavity; The thermal management structure comprises a cooling part and a first mounting part, the cooling part is connected with the first mounting part, and the first mounting part is connected with the upper cover.

2. The battery pack of claim 1, wherein, The number of the cooling parts is multiple, the number of the first mounting parts is multiple, the multiple cooling parts are distributed in a first direction, the cooling parts are connected with the multiple first mounting parts, and the first mounting parts on the same cooling part are arranged in a third direction.

3. The battery pack of claim 1, wherein, The battery pack further comprises a first fastener, the first mounting part is provided with a first connecting hole, the upper cover is provided with a second connecting hole, the first fastener is arranged in the first connecting hole and the second connecting hole and connects the upper cover and the first mounting part, and the first fastener protrudes from the upper cover in the second direction.

4. The battery pack of claim 1, wherein, The box body has a bottom plate opposite to the position of the upper cover in a second direction, the cooling parts are multiple and are arranged in the first direction, at least one first mounting part is arranged between at least two adjacent cooling parts, the first mounting part extends in the second direction and connects the cooling parts and the upper cover.

5. The battery pack of claim 4, wherein, One end of the first mounting part is connected with the upper cover in the second direction, and the other end is connected with the bottom plate.

6. The battery pack of claim 4, wherein, The battery pack further comprises a second fastener, the first mounting part is provided with a first connecting hole, the upper cover is provided with a second connecting hole, the second fastener is arranged in the first connecting hole and the second connecting hole and connects the first mounting part and the upper cover.

7. The battery pack of claim 5, wherein, The battery pack further comprises a second fastener, the first mounting part is provided with a first connecting hole, the upper cover is provided with a second connecting hole, and the bottom plate is provided with a third connecting hole, the second fastener is arranged in the first connecting hole, the second connecting hole and the third connecting hole, and the first mounting part is connected with the upper cover and the bottom plate respectively.

8. The battery pack of claim 1, wherein, The first mounting part is connected with the upper cover through adhesive.

9. The battery pack of claim 4, wherein, The thermal management structure further comprises a second mounting part, the box body has a bottom plate opposite to the upper cover in the second direction, the cooling part has opposite first and second ends in the second direction, the first mounting part is connected with the first end and the upper cover respectively, and the second mounting part is connected with the second end and the bottom plate respectively.

10. The battery pack of claim 9, wherein, The battery pack further comprises a fourth fastener, the second mounting part is connected with the bottom plate through the fourth fastener.

11. The battery pack of any one of claims 1-10, wherein, The cooling part has opposite first and second side plates in a first direction, a plurality of reinforcing plates are arranged in the cooling part in a second direction, and the plurality of reinforcing plates are connected with the first and second side plates in the first direction respectively. The first mounting part is connected with the first and second side plates. The first mounting part is connected with the first and second side plates.

12. The battery pack of claim 1, wherein, The battery pack further comprises a plurality of battery cells, the number of the cooling parts is multiple and the cooling parts are spaced apart along a first direction, at least one battery cell is arranged between two adjacent cooling parts, and the battery cell is connected with the cooling part.

13. The battery pack of claim 12, wherein, The largest surface of the battery cell is connected with the cooling part.

14. The battery pack of claim 1, wherein, The battery pack further comprises a plurality of liquid cooling plates and a plurality of battery cells, the number of the cooling parts is multiple, and the cooling parts are spaced apart along a first direction; along the first direction, at least one liquid cooling plate is arranged between two adjacent cooling parts, and at least one battery cell is arranged between at least partially adjacent cooling parts and liquid cooling plates, and the liquid cooling plate is spaced apart from the upper cover.

15. The battery pack of claim 14, wherein, Along the first direction, the thickness of the liquid cooling plate is less than the thickness of the cooling part.

16. The battery pack of any one of claims 1-10, wherein, The first mounting part comprises a first connecting plate, a second connecting plate and a third connecting plate, the first connecting plate and the second connecting plate are spaced apart along a first direction, and the first connecting plate and the second connecting plate are respectively connected with the cooling part, the third connecting plate is located between the first connecting plate and the second connecting plate, and the third connecting plate is respectively connected with the first connecting plate and the second connecting plate, and the third connecting plate is connected with the upper cover.

17. The battery pack of claim 1, wherein, The battery pack further comprises a plurality of battery cells, the battery cells are arranged in the mounting cavity and connected with the cooling part, and the battery cells are spaced apart from the box.

18. The battery pack of claim 1, wherein, The cooling part and the first mounting part are integrally formed.

19. A vehicle, wherein, The vehicle comprises a bottom support and the battery pack of any one of claims 1-18, the first mounting part penetrates the upper cover and is connected with the bottom support.

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