Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment.The battery pack comprises a battery box, a heat management structure and a plurality of single batteries, the battery box comprises a box body, an upper cover and a bottom plate, the upper cover and the bottom plate are connected to the two ends of the box body in the third direction respectively, and a mounting cavity is formed by the upper cover, the bottom plate and the box body; the heat management structure and the plurality of single batteries are arranged in the mounting cavity; the heat management structure comprises a plurality of cooling plates, the cooling plates are distributed at intervals in the first direction, each cooling plate comprises a body and a boss structure, the boss structures and the bottom plate are distributed at intervals, in the first direction, each body is provided with a first face and a second face which are opposite, and each boss structure is provided with a first end and a second end which are opposite. The first end of the boss structure protrudes relative to the first face in the first direction, and / or the second end of the boss structure protrudes relative to the second face in the first direction, the single batteries are arranged between the two adjacent bodies, and the single batteries abut against the boss structure on the side, away from the bottom plate, of the boss structure.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and electrical equipment. Background Art

[0002] At present, with the vigorous development of the new energy industry, the technical level of power batteries has also rapidly improved. In the development of battery technology, in addition to improving battery performance, safety issues are also an issue that cannot be ignored. If the safety of the battery is not guaranteed, the battery cannot be used. Therefore, how to achieve both battery performance and safety is a problem that has always been wanted to be solved in battery development.

[0003] In existing battery pack designs, in order to meet the thermal management requirements, fixing requirements and structural strength requirements of the battery pack, more components are usually required, which results in too low internal space utilization of the battery and cannot meet lightweight requirements. Utility Model Content

[0004] The embodiments of the present application provide a battery pack and an electrical device to take into account the requirements of thermal safety, structural strength, lightness, and space utilization of the battery pack.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery pack, the battery pack comprising: a battery box, a thermal management structure and a plurality of single cells, the battery box comprising a box body, an upper cover and a bottom plate, the upper cover and the bottom plate are respectively connected to two ends of the box body in the third direction, and form a mounting cavity with the box body, the thermal management structure and the plurality of single cells are both arranged in the mounting cavity;

[0007] The thermal management structure includes a plurality of cooling plates, and the plurality of cooling plates are spaced apart along the first direction. The cooling plate includes a main body and a boss structure, and the boss structure is connected to one end of the main body close to the bottom plate and spaced apart from the bottom plate. In the first direction, the main body has a first surface and a second surface relative to each other, and the boss structure has a first end and a second end relative to each other. The first end of the boss structure protrudes relative to the first surface along the first direction, and / or the second end of the boss structure protrudes relative to the second surface along the first direction. The single cell is arranged between two adjacent bodies, and on the side of the boss structure away from the bottom plate, the single cell abuts against the boss structure.

[0008] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery pack as described in any one of the first aspects above, and the battery pack is used to provide electrical energy.

[0009] In the embodiments of the present application, since the upper cover and the bottom plate are respectively connected to both ends of the box body in the third direction, the upper cover, the bottom plate and the box body can enclose a relatively closed installation cavity, and the thermal management structure and a plurality of single cells can be arranged in the installation cavity to form a battery pack. Since the thermal management structure includes a plurality of cooling plates, and the plurality of cooling plates are spaced apart along the first direction, there is a gap between adjacent two cooling plates along the first direction, and a single cell can be arranged in each gap, so that the two opposite surfaces of the single cell along the first direction can be cooled by the cooling plates, realizing the cooling of the single cell. Since the first end of the boss structure protrudes relative to the first surface along the first direction, and / or the second end of the boss structure protrudes relative to the second surface along the first direction, when the single cell is placed in the gap between adjacent two cooling plates, the single cell can be in contact with the boss structure on the side of the boss structure away from the bottom plate, so that the single cell can be supported by the boss structure, and the single cell can be better fixed inside the battery box. That is, in the embodiments of the present application, by spacing a plurality of cooling plates along the first direction and the body is connected with a boss structure, when the single cell is placed between adjacent two bodies, the single cell can be in contact with the boss structure, and the boss structure can play a role in supporting and fixing the single cell, making the single cell relatively stable inside the battery box, so as to avoid problems such as the single cells may collide with each other inside the battery pack due to unreliable fixation, resulting in damage, leakage of the single cells, and further short circuit and fire. That is, in the embodiments of the present application, by connecting the boss structure to the body, and then the boss structure is in contact with the single cell, the single cell can be effectively fixed, improving the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic diagram showing a thermal management structure provided by an embodiment of the present application;

[0011] Figure 2 An exploded view of a battery pack provided by an embodiment of the present application;

[0012] Figure 3 A schematic diagram of a battery pack provided by an embodiment of the present application;

[0013] Figure 4 A structural diagram of a cooling plate provided by an embodiment of the present application;

[0014] Figure 5 A side view of a cooling plate provided by an embodiment of the present application;

[0015] Figure 6 A cross-sectional view of a cooling plate provided by an embodiment of the present application;

[0016] Figure 7Schematic diagram showing the cooperation between a single battery and a boss structure provided by an embodiment of the present application;

[0017] Figure 8 Partial cross-sectional view of a battery box provided by an embodiment of the present application;

[0018] Figure 9 Schematic diagram of an upper cover provided by an embodiment of the present application;

[0019] Figure 10 Schematic diagram of a battery box provided by an embodiment of the present application;

[0020] Figure 11 Schematic diagram showing a thermal management structure arranged in a battery box provided by an embodiment of the present application.

[0021] Reference numerals:

[0022] 100: battery pack; 10: battery box; 20: thermal management structure; 11: box body; 12: upper cover; 30: single battery; 201: connection hole; 21: cooling plate; 22: body; 23: connecting part; 24: connecting groove; 241: first plate member; 242: second plate member; 243: third plate member; 221: cooling body; 222: base; 2211: first side plate; 2212: second side plate; 2221: first boss; 2222: second boss; 112: side plate assembly; 13: installation cavity; 1121: first cavity wall; 1122: second cavity wall; 1123: first bearing platform; 1124: second bearing platform; 2223: accommodation cavity; 2224: rib plate; 121: glue receiving groove; 200: bottom bracket; 300: connection structure; 220: connection surface; 122: colloid; 231: bonding surface; 14: bottom plate; 15: boss structure; 2111: first surface; 2112: second surface; 151: first end; 152: second end; 31: tab; 32: top cover; 33: terminal; X: first direction; Y: second direction; Z: third direction. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. 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.

[0024] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0025] In the present application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism commonly recognized in engineering. For example, "parallel" means that the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is in the range of -1° to 1°. At the same time, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity commonly recognized in engineering. For example, "perpendicular" means that the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is in the range of 89° to 91°. Equal distance or equal angle includes not only the case of absolute equality, but also the case of approximate equality commonly recognized in engineering, that is, a certain error can exist, such as a state where the tolerance range is -1% to 1%.

[0026] As Figures 1 to 11 As shown, the battery pack 100 has a first direction X, a second direction Y, and a third direction Z that intersect pairwise. The battery pack 100 includes: a battery box 10, a thermal management structure 20, and a plurality of single cells 30. The battery box 10 includes a box body 11, an upper cover 12, and a bottom plate 14. The upper cover 12 and the bottom plate 14 are respectively connected to both ends of the box body 11 in the third direction Z, and form an installation cavity 13 with the box body 11. The thermal management structure 20 and the plurality of single cells 30 are both arranged in the installation cavity 13. The thermal management structure 13 includes a plurality of cooling plates 21. The plurality of cooling plates 21 are spaced apart along the first direction X. The cooling plate 21 includes a body 22 and a boss structure 15. The boss structure 15 is connected to one end of the body 22 close to the bottom plate 14 and is spaced apart from the bottom plate 14. In the first direction X, the body 22 has opposite first surface 2111 and second surface 2112. The boss structure 15 has opposite first end 151 and second end 152. The first end 151 of the boss structure 15 protrudes relative to the first surface 2111 along the first direction X, and / or the second end 152 of the boss structure 15 protrudes relative to the second surface 2112 along the first direction X. The single cell 30 is arranged between two adjacent bodies 22, and on the side of the boss structure 15 away from the bottom plate 14, the single cell 30 abuts against the boss structure 15.

[0027] In the embodiment of the present application, since the upper cover 12 and the bottom plate 14 are respectively connected to both ends of the box body 11 in the third direction Z, the upper cover 12, the bottom plate 14 and the box body 11 can enclose a relatively closed installation cavity 13, and the thermal management structure 20 and a plurality of single cells 30 can be arranged in the installation cavity 13 to form a battery pack 100. Since the thermal management structure 20 includes a plurality of cooling plates 21, and the plurality of cooling plates 21 are spaced apart along the first direction X, it is equivalent to having a gap between two adjacent cooling plates 21 along the first direction X, and a single cell 30 can be arranged in each gap. Thus, the two opposite surfaces of the single cell 30 along the first direction X can be cooled by the cooling plates 21, realizing the cooling of the single cell 30. Since the cooling plate 21 includes a body 22 and a boss structure 15, the boss structure 15 is connected to one end of the body 22 close to the bottom plate 14 and is spaced apart from the bottom plate 14, so it is equivalent to having a gap between two adjacent bodies 21 along the first direction X, and a single cell 30 is arranged between the two adjacent bodies 21. Since the first end 151 of the boss structure 15 protrudes relative to the first surface 2111 of the body 22 along the first direction X, and / or the second end 152 of the boss structure 15 protrudes relative to the second surface 2112 of the body 22 along the first direction X, when the single cell 30 is placed in the gap between two adjacent cooling plates 21, the single cell 30 can be in contact with the boss structure 15 on the side of the boss structure 15 facing away from the bottom plate 14. Thus, the single cell 30 can be supported by the boss structure 15, so that the single cell 30 can be better fixed inside the battery box 10. That is to say, in the embodiment of the present application, by spacing apart a plurality of cooling plates 21 along the first direction X and the body 22 is connected with the boss structure 15, when the single cell 30 is placed between two adjacent bodies 22, the single cell 30 can be in contact with the boss structure 15, so that the boss structure 15 can play a role in supporting and fixing the single cell 30, making the single cell 30 more stable inside the battery box 10, thus avoiding the problems that the single cells 30 may collide with each other inside the battery pack due to unreliable fixation, resulting in damage, leakage of the single cells, and further short circuit, fire, etc. That is, in the embodiment of the present application, by connecting the body 22 with the boss structure 15, and then the boss structure 15 is in contact with the single cell 30, the single cell 30 can be effectively fixed, improving the safety of the battery pack 100.

[0028] In some embodiments, the box body 11 and the upper cover 12 are of an integrally formed structure, or the box body 11 and the bottom plate 14 are of an integrally formed structure, or the box body 11, the upper cover 12 and the bottom plate 14 are integrally formed to improve the reliability of the overall structure of the battery pack.

[0029] In some embodiments, when connecting the battery pack 100 to an electrical device, the upper cover 12 is generally close to the electrical device, and the plane where the upper cover 12 is located is perpendicular to the vertical direction. The third direction Z can be the vertical direction and collinear with the direction of gravity. When the battery pack 100 is connected to the electrical device, the single battery 30 can abut against the boss structure 15 under the action of gravity, so that the boss structure 15 supports the single battery 30. In addition, as Figure 3 , Figure 6 , Figure 10 , Figure 11 shown, the boss structures 15 are spaced apart from the bottom plate 14. Thus, while the boss structures 15 support the single battery 30, there can also be a gap between the single battery and the bottom plate 14, reserving a buffer space between the single battery 30 and the bottom plate 14. Therefore, when a foreign object hits the battery pack 100 from the bottom of the battery pack 100, it can avoid the impact force being directly transmitted to the single battery 30, preventing damage to the single battery 30 and improving the protection effect on the single battery 30.

[0030] In addition, in the embodiments of the present application, multiple cooling plates 21 are spaced apart along the first direction X, and the single battery 30 is disposed between two adjacent cooling plates 21. Between two adjacent cooling plates 21, multiple single batteries 30 can be provided, and the single batteries 30 between two adjacent cooling plates 21 can be distributed along the second direction Y. Thus, the two cooling plates 21 can cool multiple battery cells 30. The number of single batteries 30 between two adjacent cooling plates 21 can be 4, 5, 8, 10, etc. The specific value of the number of single batteries 30 between two adjacent cooling plates 21 is not specifically limited in the embodiments of the present application. Thus, the multiple cooling plates 21 and the multiple battery cells 30 can be interconnected to form a whole and be accommodated in the battery box 10 to ensure effective thermal management of the single battery 30 and the overall structural strength of the battery pack, thereby improving the performance of the battery pack.

[0031] It should also be noted that the first direction X and the second direction Y intersect, and there can be an included angle between the first direction X and the second direction Y. Thus, the cooling plates 21 and the single battery 30 can be arranged so that the single battery 30 and the multiple cooling plates 21 can be arranged in a preset manner inside the battery pack. Specifically, the first direction X is perpendicular to the second direction Y. At this time, the distribution direction of the cooling plates 21 is perpendicular to the distribution direction of the single batteries 30 between two adjacent cooling plates 21, facilitating the arrangement of the cooling plates 21 and the single battery 30. Of course, the included angle can also be other values, such as 60°, 70°, 76°, 80°, 95°, etc. The specific value of the included angle between the first direction X and the second direction Y is not specifically limited in the embodiments of the present application.

[0032] In addition, in the embodiments of the present application, the first direction X and the second direction Y may be parallel to the plane where the upper cover 12 is located, and the third direction Z may intersect with the plane where the upper cover 12 is located. The angle between the third direction Z and the plane where the upper cover 12 is located may be 90°. Of course, the angle between the third direction Z and the plane where the upper cover 12 is located may also be other values, such as 60°, 70°, 76°, 80°, 95°, etc. For the specific direction of the third direction Z, the embodiments of the present application do not make specific limitations here.

[0033] In addition, in some embodiments, as Figure 1 , Figure 2 shown, at least one side of the cooling plate 21 facing the upper cover 12 is provided with a connecting structure 300, and the connecting structure 300 connects the upper cover 12 and the body 22 along the third direction Z.

[0034] Since at least one side of the cooling plate 21 facing the upper cover 12 is provided with the connecting structure 300, the upper cover 12 and the body 22 can be connected through the connecting structure 300, that is, the connecting structure 300 connects the upper cover 12 and the body 22 along the third direction Z. Thus, the body 22 is connected to the upper cover 12 through the connecting structure 300, and the upper cover 12 is connected to the box body 11. Therefore, the position of the upper cover 12 is fixed. It is equivalent to that the cooling plate 21 is connected to a fixed component through the connecting structure 300, so that the cooling plate 21 is fixed, avoiding the problem that the position of the cooling plate 21 is prone to change, and further avoiding the problem that the position change of the cooling plate 21 may cause mutual friction between the single cells. That is, by setting the connecting structure 300, the safety of the battery pack 100 can be effectively improved.

[0035] Among them, the connecting structure 300 can be set in different ways. For example, the connecting structure 300 can be set only on two cooling plates 21 at the edge, or the connecting structure 300 can also be set on all the cooling plates 21; or the connecting structure can also be set on some cooling plates 21 according to the actual situation. Here, taking the thermal management structure 20 including 10 cooling plates 21 as an example for illustration, the 10 cooling plates 21 are arranged in sequence along the first direction X and are called the first cooling plate, the second cooling plate, the third cooling plate, etc. according to the order. The connecting structure 300 can be set on the first cooling plate and the tenth cooling plate; the connecting structure 300 can also be set on the first cooling plate, the second cooling plate, the ninth cooling plate, and the tenth cooling plate; the connecting structure 300 can also be set on the fourth cooling plate and the seventh cooling plate. For the specific setting method of the connecting structure 300, the embodiments of the present application do not make specific limitations here.

[0036] In addition, in some embodiments, as Figure 6 shown, at least part of the connecting structure 300 can penetrate through the upper cover 12 along the third direction Z for connecting electrical equipment.

[0037] At least a part of the connection structure 300 penetrates through the upper cover 12 along the third direction Z. Therefore, a part of the connection structure 300 can extend out from the installation cavity 20, and the connection structure 300 can extend outside the upper cover 12. The part of the connection structure 300 extending out from the upper cover 12 can be used as a structure for connecting the battery pack 100 to the electrical device, so as to connect the battery pack 100 to the electrical device. Thus, the weight of the thermal management structure 13 and the single battery 30 can be transmitted to the electrical device, improving the overall mode of the battery pack 100, and further improving the use safety of the battery pack.

[0038] It should be noted that in addition to connecting the battery pack 100 to the electrical device through the connection structure 300, other structures can also be additionally provided. For example, an installation post with a threaded hole can also be connected and provided on the side of the battery pack 100, and the battery pack 100 can be connected to the electrical device by setting screws, bolts, etc. in the threaded hole. Since the part of the connection structure 300 extending out from the upper cover 12 is also connected to the electrical device, in this embodiment, the mounting points for connecting the battery pack 100 to the electrical device include the installation post on the side and the connection structure 300 on the thermal management structure 20. Multiple mounting points can jointly connect the battery pack 100, which can further reduce the weight borne by the mounting points and reduce the safety hazards of connecting the battery pack 100 to the electrical device.

[0039] In addition, in some embodiments, as Figure 4 shown, the cooling plate 21 may further include a connecting portion 23. The connecting portion 23 is connected to one side of the body 22 facing the upper cover 12. A connecting groove 24 is formed on the side of the connecting portion 23 facing the body 22, and the connecting groove 24 extends along the second direction Y; a connecting hole 201 is formed on the bottom of the connecting groove 24, and the connecting hole 201 penetrates through the bottom of the connecting groove 24 along the third direction Z. The connection structure 300 is inserted through the connecting hole 201 and connects the connecting portion 23 and the upper cover 12; a flow channel is formed in the body 22.

[0040] Since the cooling plate 21 includes the connecting portion 23, the connecting portion 23 is connected to one side of the body 22 facing the upper cover 12, and the connecting groove 24 is formed on the side of the connecting portion 23 facing the body 22, the connecting portion 23 is close to the upper cover 12, and the connection structure 300 can be arranged on the connecting portion 23 and extend out from the upper cover 12. Specifically, the connecting hole 201 is formed on the bottom of the connecting groove 24, and the connecting hole 201 penetrates through the bottom of the connecting groove 24 along the third direction Z. Thus, the connection structure 300 can be inserted through the connecting hole 201 and connected to the connecting portion 23. The connection structure 300 can penetrate through the connecting portion 23 through the connecting hole 201, and further the connection structure 300 can be connected to the upper cover 12 to realize the fixation of the thermal management structure 20.

[0041] In some embodiments, the body 22, the connecting portion 23, and the boss structure 15 are integrally formed structures to improve the structural reliability among the three, thereby enhancing the safety of the battery pack.

[0042] Among them, a flow channel is formed in the body 22, and coolant can flow in the flow channel. Thus, the coolant can flow relative to the single battery 30. When the coolant flows, the heat generated by the single battery 30 can be carried away to achieve thermal management of the single battery 30. The thermal management structure 20 includes a plurality of cooling plates 21. The plurality of cooling plates 21 can be connected in sequence, and the flow channels of the plurality of cooling plates 21 can communicate with each other. The coolant can flow between the plurality of cooling plates 21, that is, the coolant can flow between the plurality of bodies 22 to form a coolant circulation of the battery pack.

[0043] In the embodiments of the present application, the plurality of cooling plates 21 are arranged at intervals along the first direction X. A single battery 30 is arranged between two adjacent cooling plates 21. A plurality of single batteries 30 distributed along the second direction Y can be arranged between two adjacent cooling plates 21. In order to enable the cooling plate 21 to cool the plurality of single batteries 30, the cooling plate 21 can also extend along the second direction Y. The connecting groove 24 extends along the second direction Y, and the number of the connecting holes 201 on the groove bottom of the connecting groove 24 can also be multiple. The plurality of connecting holes 201 are spaced along the second direction Y. Connecting structures 300 can be arranged in the plurality of connecting holes 201. The plurality of connecting structures 300 can be connected to the upper cover 12. Thus, the thermal management structure 20 and the upper cover 12 can be connected at multiple positions, improving the connection strength between the thermal management structure 20 and the upper cover 12; when the connecting structure 300 is also connected to the electrical device, the thermal management structure 20 and the electrical device can also be connected at multiple positions, improving the connection strength between the battery pack 100 and the electrical device.

[0044] It should be noted that the connecting structure 300 can be a bolt. Of course, the connecting structure 300 can also be other components with a connecting function. For example, the connecting structure 300 is a pin. The specific type of the connecting structure 300 is not limited in the embodiments of the present application.

[0045] In addition, in some embodiments, such as Figure 4 、 Figure 5As shown, the main body 22 has a connecting surface 220 facing the upper cover 12. The connecting portion 23 may include a first plate member 241, a second plate member 242, and a third plate member 243. The first plate member 241 and the second plate member 242 are oppositely arranged along the first direction X. The third plate member 243 is connected between the first plate member 241 and the second plate member 242 and encloses a connecting groove 24. Both the first plate member 241 and the second plate member 242 are connected to the connecting surface 220. The third plate member 243 forms the bottom of the connecting groove 24. A connecting hole 201 is provided on the third plate member 243, and the connecting hole 201 penetrates the third plate member 243 along the third direction Z.

[0046] Since the first plate member 241 and the second plate member 242 are oppositely arranged along the first direction X, and the third plate member 243 is connected between the first plate member 241 and the second plate member 242 and encloses a connecting groove 24, therefore, the connecting portion 23 can form a structure similar to a "U" shape, and the space between the first plate member 241 and the second plate member 242 forms the internal space of the connecting groove 24, providing an avoidance space for the subsequent connecting structure 300 to connect the connecting portion 23 and the upper cover 12. The notch of the connecting groove 24 faces the main body 22, and the first plate member 241 and the second plate member 242 are connected to the main body 22 to realize the connection between the connecting portion 23 and the cooling plate 21. The connecting hole 201 is provided on the third plate member 243. Thus, once the connecting structure 300 passes through the connecting hole 201, the connecting structure 300 can connect the third plate member 243 and the upper cover 12, so that the third plate member 243 is connected to the upper cover 12. And the third plate member 243 is respectively connected to the first plate member 241 and the second plate member 242. That is, it is equivalent to that the connecting structure 300 can fix the connection between the main body 22 and the upper cover 12 through the third plate member 243, the first plate member 241, and the second plate member 242, and the main body 22 is fixed. That is, by providing the first plate member 241, the second plate member 242, and the third plate member 243, components convenient for the connecting structure 300 to connect can be formed, so that it is convenient for the connecting structure 300 to connect to the upper cover through the third plate member 243, and the main body 22 is fixed.

[0047] In addition, in some embodiments, the thermal management structure 13 further includes a plurality of bases 222. The bases 222 are connected to the side of the cooling plate 21 facing away from the upper cover 12, and the bases 222 are spaced from the bottom plate 14. In the first direction X, at least one end of the base 222 protrudes from the cooling plate 21 and forms a boss structure 15.

[0048] With such a setting, it is equivalent to forming a boss structure 15 at at least one end of the base 222. Thus, when the single battery 30 is placed between two adjacent cooling plates 21, at least one end of the base 222 supports the single battery 30. And the base 222 is spaced from the bottom plate 14, ensuring a gap between the single battery 30 and the bottom plate 14. Thus, when the bottom plate 14 is stressed, the force of the bottom plate 14 will not be transmitted to the single battery 30, which can play a certain protective role for the single battery 30. In addition, by providing the base 222 and forming a boss structure 15 at at least one end of the base 222, it is also convenient to form a boss structure 15 on the cooling plate 21.

[0049] It should be noted that in some embodiments, the base 222 has opposite first and second ends in the first direction X. Both the first end and the second end of the base 222 can protrude from the cooling plate 21, thus forming two boss structures 15, namely the first boss 2221 and the second boss 2222. Of course, it is also possible to only make the first end of the base 222 protrude from the cooling plate 21 to form the first boss 2221, or only make the second end of the base 222 protrude from the cooling plate 21 to form the second boss 2222. In this regard, the embodiments of the present application do not limit this here.

[0050] In addition, when setting the thermal management structure 20 and the single battery 30, a plurality of cooling plates 21 are arranged at intervals in the first direction X. The single battery 30 is arranged between two adjacent cooling plates 21 and abuts against the first boss 2221 of one of the cooling plates 21 and abuts against the second boss 2222 of the other cooling plate 21. That is, the base 222 can be used as a structure for carrying the single battery 30, the single battery 30 is arranged in the installation cavity 12, and the cooling plate 21 is in contact with the single battery 30, so that the cooling plate 21 can perform thermal management on the single battery 30, and it is possible to avoid additionally providing other structures or gluing to connect the single battery 30, and it can also further reduce the weight of the battery pack 100. Furthermore, when installing the battery pack 100, it is possible to avoid the problem that the connection of the battery pack 100 has potential safety hazards due to the large weight of the battery pack 100.

[0051] It should be noted that the flow channel can also be arranged inside the body 22 and / or the base 222. When the flow channel is arranged inside the body 22, the body 22 can be in contact with the surface of the single battery 30 facing the body 22 and take away the heat of the single battery 30 from the surface of the single battery 30 facing the body 22. When the flow channel is arranged inside the base 222, the base 222 can be in contact with the surface of the single battery 30 facing the base 222 and take away the heat of the single battery 30 from the surface of the single battery 30 facing the base 222. In the case where the flow channel is arranged inside both the body 22 and the base 222, the body 22 and the base 222 can cool different surfaces of the single battery 30, and the cooling effect on the single battery 30 is better.

[0052] In addition, in some embodiments, the single cell 30 includes a top cover 32 and a pole column 33 disposed on the top cover 32. The top cover 32 abuts against the boss structure 15, and the pole column 33 is located between the boss structures 15 of two adjacent cooling plates 21.

[0053] With such an arrangement, the gap between the boss structures 15 of two adjacent cooling plates 21 can be equivalent to avoiding the pole column 33, thereby facilitating the subsequent connection of the pole column 33 to other components. Moreover, the top cover 32 abuts against the boss structure 15, so that the boss structure 15 can support the top cover 32, and thus the boss structure 15 supports the single cell 30, avoiding the contact between the single cell 30 and the bottom plate 14, and further avoiding the problem of the force of the bottom plate 14 being transmitted to the single cell 30.

[0054] It should be noted that the single cell 30 may further include a tab 31, and the tab 31 is connected to the pole column 33.

[0055] In addition, in some embodiments, as Figure 8 、 Figure 10 、 Figure 11 shown, in the first direction X, the installation cavity 13 may include opposite first cavity walls 1121 and second cavity walls 1122. The first cavity wall 1121 is provided with a first bearing platform 1123, and the single cell is carried on the first bearing platform 1123, and / or the second cavity wall 1122 is provided with a second bearing platform 1124, and the single cell 30 is carried on the second bearing platform 1124.

[0056] In the first direction X, the installation cavity 13 may include opposite first cavity walls 1121 and second cavity walls 1122. Since the first cavity walls 1121 and the second cavity walls 1122 are also distributed along the first direction X, which is consistent with the distribution direction of the cooling plates 21, the first cavity walls 1121 and the second cavity walls 1122 may be opposite to the edge cooling plates 21 among the plurality of cooling plates 21. Among them, a first bearing platform 1123 is provided on the first cavity wall 1121, and a second bearing platform 1124 is provided on the second cavity wall 1122. Since in the first direction X, the first bearing platform 1123 is opposite to the first boss 2221 of a cooling plate 21, and the second bearing platform 1124 is opposite to the second boss 2222 of another cooling plate 21, the first bearing platform 1123 is opposite to the first boss 2221 of a cooling plate 21 close to the first cavity wall 1121, and the second bearing platform 1124 is opposite to the second boss 2222 of a cooling plate 22 close to the second cavity wall 1122. Thus, when the single cell 30 is placed in the box body 11, the gap between the first cavity wall 1121 and the cooling plate 21 can also accommodate the single cell 30. At this time, the single cell 30 abuts against the first bearing platform 1123, and the first bearing platform 1123 can play a role in bearing the single cell 30, and / or the gap between the second cavity wall 1122 and the cooling plate 21 can also accommodate the single cell 30. At this time, the single cell 30 abuts against the second bearing platform 1124, and the second bearing platform 1124 can play a role in bearing the single cell 30. That is, by providing the first bearing platform 1123 and the second bearing platform 1124, more single cells 30 can be accommodated in the box body 11, thereby improving the space utilization rate inside the box body 11.

[0057] Among them, at the edge cooling plate 21, there is only one adjacent cooling plate 21 for this cooling plate 21. There is only one side of this cooling plate 21 provided with the single cell 30, and the other side of this cooling plate 21 is the first cavity wall 1123 or the second cavity wall 1124. Since the first bearing platform 1123 is provided on the first cavity wall 1123. The second bearing platform 1124 is provided on the second cavity wall 1124. Therefore, the first bearing platform 1123 and the second bearing platform 1124 can cooperate with the edge cooling plate 21 to realize the support of the single cell 30, so that both sides of the edge cooling plate 21 can be provided with single cells, so that the battery pack 100 can be provided with more single cells 30, and the support effect of the battery box 10 and the thermal management structure 20 on the single cell 30 can be better. Specifically, the first bearing platform 1123 and the first boss 2221 can jointly bear a single cell 30, and the second bearing platform 1124 and the second boss 2222 can also jointly bear a single cell 30.

[0058] Of course, it is also possible to additionally arrange the single cell 30 at the cooling plate 21 at the edge in other ways. For example, the size of the first boss 2221 of the cooling plate 21 close to the first cavity wall 1123 can be larger, and the size of the second boss 2222 of the cooling plate 21 close to the second cavity wall 1124 can also be larger, so that the contact area between the first boss 2221 of the cooling plate 21 close to the first cavity wall 1123 and the single cell 30 can be larger, and the contact area between the second boss 2222 of the cooling plate 21 close to the second cavity wall 1124 and the single cell 30 can be larger, which can be greater than 50% of the area of the surface of the single cell 30 facing the base 222, so that the single cell can be supported only by the first boss 2221 or the second boss 2222.

[0059] In addition, in some embodiments, as Figure 6 shown, a receiving cavity 2223 can be arranged inside the base 222, and a rib plate 2224 is arranged in the receiving cavity 2223. At least one end of the rib plate 2224 is connected to the cavity wall of the receiving cavity 2223 in the third direction Z. In a plane perpendicular to the third direction Z along the third direction Z, the orthographic projection of the rib plate 2224 is located inside the orthographic projection of the boss structure 15.

[0060] The interior of the base 222 may be provided with a receiving cavity 2223. A rib plate 2224 is disposed in the receiving cavity 2223. Opposite ends of the rib plate 2224 in the third direction Z are both connected to the cavity wall of the receiving cavity 2223, so that the rib plate 44 can be fixed inside the base. Among them, in a plane perpendicular to the third direction Z, the orthographic projection of the rib plate 2224 is located inside the orthographic projection of the boss structure 15. When the boss structure 15 is formed through the base 222, the boss structure 15 is equivalent to including a first boss 2221 and a second boss 2222. Thus, in a plane perpendicular to the third direction Z along the third direction Z, the orthographic projection of the rib plate 2224 can be located inside the orthographic projection of the first boss 2221, and the orthographic projection of the rib plate 2224 can be located inside the orthographic projection of the second boss 2222. When the orthographic projection of the rib plate 2224 is located inside the orthographic projection of the first boss 2221, the rib plate 2224 can support the first boss 2221 in the third direction Z. When the first boss 2221 bears the single cell 30, the rib plate 2224 can improve the strength of the first boss 2221, so that the first boss 2221 has a better bearing effect on the single cell 30. And when an impact force is transmitted to the boss structure 15 at the bottom of the battery pack 100, the rib plate 2224 can first bear a certain amount of buffer force to protect the single cell 30; when the projection of the rib plate 2224 in the third direction Z is located inside the projection of the second boss 2222 in the third direction Z, the rib plate 2224 can support the second boss 2222 in the third direction Z. When the second boss 2222 bears the single cell 30, the rib plate 2224 can also bear the single cell 30, which can improve the strength of the second boss 2222, so that the second boss 2222 has a better bearing effect on the single cell 30. And when an impact force is transmitted to the boss structure 15 at the bottom of the battery pack 100, the rib plate 2224 can first bear a certain amount of buffer force to protect the single cell 30.

[0061] It should be noted that a coolant may also be provided in the receiving cavity 2223 inside the base 222. As part of the flow channel, the base 222 can thus cool the surface of the single cell 30 facing the base 222, cooperate with the cooling body 221 to cool the single cell 30, so that the cooling plate 21 has a better cooling effect on the single cell 30.

[0062] In addition, in some embodiments, as Figure 9 shown, a colloid 122 is provided between the upper cover 12 and at least a part of the body 22, and / or a colloid 122 is provided between the upper cover 12 and the single cell 30. The body 22 and / or the single cell 30 are adhered to the upper cover 122 through the colloid 122.

[0063] When a colloid 122 is provided between the upper cover 12 and at least a part of the main body 22, it is equivalent to that the upper cover 12 and the thermal management structure 20 can be bonded together through the colloid 122 to realize the connection between the upper cover 12 and the thermal management structure 20. And by providing the colloid 122, the upper cover 12 and the thermal management structure 12 can be conveniently connected, so that the main body 22 is fixed relative to the upper cover 12.

[0064] When a colloid 122 is provided between the upper cover 12 and the single battery 30, it is equivalent to that the upper cover 12 and the single battery 30 are bonded together through the colloid 122 to realize the connection between the single battery 30 and the upper cover 12, which can further fix the single battery 30 and further avoid the problem of the single battery 30 shaking.

[0065] Of course, in the embodiment of the present application, the upper cover 12 and the thermal management structure 20 can also be connected in other ways. For example, a colloid 122 can be provided between the upper cover 12 and at least a part of the thermal management structure 20, and a connection structure 300 is also provided on the thermal management structure 20, so that the connection structure 300 penetrates the upper cover 12, and the upper cover 12 and the thermal management structure 20 are jointly connected through the connection structure 300 and the colloid 112, so that the connection effect between the upper cover 12 and the thermal management structure 20 is better.

[0066] In the embodiment of the present application, the colloid 122 can be provided between the upper cover 12 and the thermal management structure 20 in different ways. The following two examples are specifically used for illustration:

[0067] Method 1: A glue receiving groove 121 is provided on the surface of the upper cover 12 facing the bottom plate 14. The glue receiving groove 121 extends along the second direction Y. At least a part of the main body 22 is embedded in the glue receiving groove 121, and a colloid 122 is provided in the glue receiving groove 121. The colloid 122 connects the upper cover 12 and the main body 22.

[0068] A glue receiving groove 121 is provided on the surface of the upper cover 12 facing the main body 22. The glue receiving groove 121 extends along the second direction Y. A colloid 122 is provided in the glue receiving groove 121. Thus, when connecting the main body 22 and the upper cover 12, part of the main body 22 can be directly embedded in the glue receiving groove 121, and the colloid 122 in the glue receiving groove 121 can bond the main body 22, so that the cooling plate 21 is connected to the upper cover 12. That is, in the embodiment of the present application, by providing the glue receiving groove 121 on the upper cover 12, the main body 22 can be directly embedded in the glue receiving groove 121, so as to conveniently realize the connection between the cooling plate 21 and the upper cover 12. Among them, the main body 22 can be embedded in the glue receiving groove 121, and the part of the main body 22 embedded in the glue receiving groove 121 is connected to the bottom of the glue receiving groove 121.

[0069] Among them, when the main body 22 is connected with a connecting portion 23, the connecting portion 23 can be embedded in the glue receiving portion 121.

[0070] Method 2: A glue storage groove 121 is provided on the surface of the upper cover 12 facing the bottom plate 14. The glue storage groove 121 extends along the second direction Y. At least part of the body 22 abuts against the surface of the upper cover 12 facing the bottom plate 14. The body 22 has an adhesive surface 231 facing the upper cover 12. In the third direction Z and on a plane perpendicular to the third direction Z, the orthographic projection of the glue storage groove 121 is located inside the orthographic projection of the adhesive surface 231. A colloid 122 is provided in the glue storage groove 121, and the colloid 122 is connected to the adhesive surface 231.

[0071] A glue storage groove 121 is provided on the surface of the upper cover 12 facing the bottom plate 14. The glue storage groove 121 extends along the second direction Y. At least part of the connecting portion 23 of the heat management structure 20 abuts against the surface of the upper cover 12 facing the bottom plate 14. Since the body 22 has an adhesive surface 231 facing the upper cover 12 and the orthographic projection of the glue storage groove 121 is located inside the orthographic projection of the adhesive surface 231, it is equivalent to that the size of the adhesive surface 231 is larger, and it can directly abut against the surface of the connecting portion 23 where the glue storage groove 121 is provided. And a colloid 122 is provided in the glue storage groove 121, and the colloid 122 can be connected to the adhesive surface 231 to realize the connection between the cooling plate 21 and the upper cover 12. That is, in the embodiment of the present application, the adhesive surface 231 is larger than the glue storage groove 121 in size, and the colloid 112 filled in the glue storage groove 231 can be fully connected to the adhesive surface 231 of the cooling plate 21 to ensure the firm connection between the cooling plate 21 and the upper cover 12.

[0072] In the embodiment of the present application, since the upper cover 12 and the bottom plate 14 are respectively connected to both ends of the box body 11 in the third direction Z, the upper cover 12, the bottom plate 14 and the box body 11 can enclose a relatively closed installation cavity 13, and the thermal management structure 20 and a plurality of single cells 30 can be arranged in the installation cavity 13 to form a battery pack 100. Since the thermal management structure 20 includes a plurality of cooling plates 21, and the plurality of cooling plates 21 are spaced apart along the first direction X, it is equivalent to having a gap between two adjacent cooling plates 21 along the first direction X, and a single cell 30 can be arranged in each gap. Thus, two opposite surfaces of the single cell 30 along the first direction X can be cooled by the cooling plates 21, realizing the cooling of the single cell 30. Since the cooling plate 21 includes a body 22 and a boss structure 15, and the boss structure 15 is connected to one end of the body 22 close to the bottom plate 14 and is spaced apart from the bottom plate 14, it is equivalent to having a gap between two adjacent bodies 21 along the first direction X, and a single cell 30 is arranged between two adjacent bodies 21. Since the first end 151 of the boss structure 15 protrudes relative to the first surface 2111 of the body 22 along the first direction X, and / or the second end 152 of the boss structure 15 protrudes relative to the second surface 2112 of the body 22 along the first direction X, when the single cell 30 is placed in the gap between two adjacent cooling plates 21, the single cell 30 can be in contact with the boss structure 15 on the side of the boss structure 15 facing away from the bottom plate 14. Thus, the single cell 30 can be supported by the boss structure 15, so that the single cell 30 can be better fixed inside the battery box 10. That is, in the embodiment of the present application, by spacing a plurality of cooling plates 21 along the first direction X and connecting the body 22 with the boss structure 15, when the single cell 30 is placed between two adjacent bodies 22, the single cell 30 can be in contact with the boss structure 15, and thus the boss structure 15 can play a role in supporting and fixing the single cell 30, making the single cell 30 more stable inside the battery box 10, thereby avoiding problems such as the single cells 30 may collide with each other inside the battery pack due to unreliable fixation, resulting in damage, leakage of the single cells, and further leading to short circuits, fires, etc. That is, in the embodiment of the present application, by connecting the body 22 with the boss structure 15, and then the boss structure 15 is in contact with the single cell 30, the single cell 30 can be effectively fixed, improving the safety of the battery pack 100.

[0073] In addition, the embodiment of the present application also proposes an electrical device, including the battery pack 100 in any one of the above embodiments. The electrical device is provided with a bottom bracket 200, and both the upper cover 12 and the bottom bracket 200 are connected to the thermal management structure 20.

[0074] Among them, the electrical equipment can be a vehicle, a moped, an energy storage system using energy such as wind energy or solar energy, and so on. In this embodiment, preferably, the electrical equipment is a vehicle. A bottom bracket 200 is provided in the vehicle. Both the upper cover 12 and the bottom bracket 200 are connected to the thermal management structure 20. That is to say, the upper cover 12 and the bottom bracket 200 can be connected through the thermal management structure 20 to realize the installation of the battery pack 100 in the vehicle, and the overall mode of the battery pack 100 and the vehicle can be improved. Moreover, in this application, the thermal management structure 20 is connected through the upper cover 12, avoiding the need to additionally set a large amount of potting glue in the installation cavity 13 to fix the thermal management structure 20, which can reduce the overall weight of the battery pack 100 and avoid the problem of potential safety hazards in the connection between the battery pack 100 and the vehicle due to the large weight of the battery pack 100.

[0075] It should be noted that the various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0076] Although the optional embodiments of the embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the optional embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

[0077] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such article or terminal device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of another identical element in the article or terminal device including the element.

[0078] The technical solutions provided by the present application have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. At the same time, for those of ordinary skill in the art, according to the principle and implementation manner of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A battery pack, the battery pack having a first direction, a second direction and a third direction intersecting each other, characterized in that: The battery pack comprises: a battery box, a thermal management structure and a plurality of single cells, the battery box comprises a box body, an upper cover and a bottom plate, the upper cover and the bottom plate are respectively connected to two ends of the box body in the third direction, and form a mounting cavity with the box body, the thermal management structure and the plurality of single cells are both arranged in the mounting cavity; The thermal management structure includes a plurality of cooling plates, and the plurality of cooling plates are spaced apart along the first direction. The cooling plate includes a main body and a boss structure, and the boss structure is connected to one end of the main body close to the bottom plate and spaced apart from the bottom plate. In the first direction, the main body has a first surface and a second surface opposite to each other, and the boss structure has a first end and a second end opposite to each other. The first end of the boss structure protrudes relative to the first surface along the first direction, and / or the second end of the boss structure protrudes relative to the second surface along the first direction. The single cell is arranged between two adjacent bodies, and on the side of the boss structure facing away from the bottom plate, the single cell abuts against the boss structure.

2. The battery pack according to claim 1, characterized in that: A connection structure is provided on a side of at least one of the cooling plates facing the upper cover, and the connection structure connects the upper cover and the body along the third direction.

3. The battery pack according to claim 2, characterized in that: At least a portion of the connection structure passes through the upper cover along the third direction.

4. The battery pack according to claim 2, characterized in that: The cooling plate further includes a connecting portion, the connecting portion is connected to a side of the body facing the upper cover, a connecting groove is formed on the side of the connecting portion facing the body, and the connecting groove extends along the second direction; A connecting hole is provided on the bottom of the connecting groove, and the connecting hole passes through the bottom of the connecting groove along the third direction. The connecting structure is passed through the connecting hole and connects the connecting part and the upper cover. A flow channel is provided in the main body.

5. The battery pack according to claim 4, characterized in that: The body has a connection surface facing the upper cover, the connection portion includes a first plate, a second plate and a third plate, the first plate and the second plate are arranged opposite to each other along the first direction, the third plate is connected between the first plate and the second plate and encloses the connection groove, and the first plate and the second plate are both connected to the connection surface; The third plate forms a groove bottom of the connecting groove, the connecting hole is arranged on the third plate, and the connecting hole penetrates the third plate along the third direction.

6. The battery pack according to claim 1, characterized in that: The thermal management structure also includes a plurality of bases, which are connected to a side of the cooling plate away from the upper cover and spaced apart from the bottom plate. In the first direction, at least one end of the base protrudes from the cooling plate to form the boss structure.

7. The battery pack according to claim 1, characterized in that: The single cell comprises a top cover and a pole arranged on the top cover, the top cover is in contact with the boss structure, and the pole is located between the boss structures of two adjacent cooling plates.

8. The battery pack according to claim 1, characterized in that: In the first direction, the installation cavity includes a first cavity wall and a second cavity wall relative to each other, the first cavity wall is provided with a first supporting platform, the single cell is supported on the first supporting platform, and / or the second cavity wall is provided with a second supporting platform, the single cell is supported on the second supporting platform.

9. The battery pack according to claim 6, characterized in that: A accommodating cavity is provided inside the base, and a rib plate is provided in the accommodating cavity. At least one end of the rib plate in the third direction is connected to the cavity wall of the accommodating cavity; along the third direction and on a plane perpendicular to the third direction, the orthographic projection of the rib plate is located inside the orthographic projection of the boss structure.

10. The battery pack according to claim 1, characterized in that: A colloid is disposed between the upper cover and at least a portion of the body, and / or a colloid is disposed between the upper cover and the single battery, and the thermal management structure and / or the single battery are bonded to the upper cover via the colloid.

11. The battery pack according to claim 1, characterized in that: A glue containing groove is arranged on the surface of the upper cover facing the bottom plate, the glue containing groove extends along the second direction, at least a part of the main body is embedded in the glue containing groove, a colloid is arranged in the glue containing groove, and the colloid connects the upper cover and the main body.

12. The battery pack according to claim 1, characterized in that: A glue containing groove is provided on the surface of the upper cover facing the bottom plate, the glue containing groove extends along the second direction, at least a portion of the body abuts against the surface of the upper cover facing the bottom plate, and the body has a bonding surface facing the upper cover; Along the third direction and on a plane perpendicular to the third direction, the orthographic projection of the glue containing groove is located inside the orthographic projection of the bonding surface, a colloid is arranged in the glue containing groove, and the colloid is connected to the bonding surface.

13. An electrical equipment, characterized in that: A battery pack comprising any one of claims 1 to 12, wherein the battery pack is used to provide electrical energy.

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