Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. The battery pack has a first direction and a second direction which are intersected, the battery pack comprises a battery box, a heat management structure and a plurality of single batteries, the battery box comprises an upper cover, a bottom plate and a frame, the upper cover and the bottom plate are connected to the two opposite sides of the frame in the first direction respectively, and the upper cover and the bottom plate and the frame define a mounting cavity; 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 second direction, the ends, facing the bottom plate, of the cooling plates are fixedly connected with the bottom plate, the cooling plates are provided with two opposite cooling faces in the second direction, supporting pieces are connected to the cooling faces, and the single batteries are connected between the supporting pieces and the upper cover.

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] With the booming new energy industry, power battery technology is rapidly advancing. In the development of battery technology, in addition to improving battery performance, safety is also a crucial issue. If battery safety cannot be guaranteed, the battery is unusable. Therefore, achieving both optimal battery performance and safety remains a key challenge in battery development.

[0003] In existing battery pack designs, in order to meet the thermal management requirements, fixation requirements and structural strength requirements of the battery pack, a large number of components are usually required, resulting in too low internal space utilization of the battery and failure to 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, lightweight 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 having a first direction and a second direction intersecting each other, the battery pack comprising: a battery box, a thermal management structure, and a plurality of single cells, the battery box comprising an upper cover, a bottom plate, and a frame, the upper cover and the bottom plate being respectively connected to opposite sides of the frame in the first direction and enclosing an installation cavity with the frame, the thermal management structure and the plurality of single cells being disposed in the installation cavity;

[0007] The thermal management structure includes a plurality of cooling plates, which are spaced apart along the second direction. One end of the cooling plate facing the base plate is fixedly connected to the base plate. The cooling plate has two opposite cooling surfaces along the second direction. Support members are connected to the cooling surfaces. The single battery is connected between the support member and the upper cover.

[0008] In a second aspect, an embodiment of the present application provides a vehicle, comprising a battery pack according to any one of the above-mentioned first aspects, wherein the battery pack is used to provide electrical energy.

[0009] In the embodiment of the present application, since the upper cover and the bottom plate are respectively connected to opposite sides of the frame in the first direction, the upper cover, the bottom plate, and the frame can enclose a relatively closed installation cavity, and the thermal management structure and multiple single cells can be placed in the installation cavity to form a battery pack. Since the thermal management structure includes multiple cooling plates, and the multiple cooling plates are spaced apart along the second direction, it is equivalent to having a gap between two adjacent cooling plates along the second direction. Single cells can be placed in each gap, so that the two surfaces of the single cells facing each other in the second direction can be cooled by the cooling plates, thereby cooling the single cells. Since the cooling plate has two opposite cooling surfaces along the second direction and supports are connected to the cooling surfaces, when the single battery is placed in the gap between two adjacent cooling plates, the single battery can be abutted against the support on the side of the support facing away from the bottom plate, so that the single battery can be supported by the support, so that the single battery can be better fixed inside the battery box, and the end of the cooling plate facing the bottom plate is fixedly connected to the bottom plate, so that the cooling plate is also fixed inside the installation cavity, so that the support on the cooling plate can further ensure that the single battery is fixed more firmly inside the frame.

[0010] That is, in the embodiment of the present application, by distributing multiple cooling plates at intervals along the second direction and connecting the cooling plates to the support members, when a single battery cell is placed between two adjacent cooling plates, the single battery cell can abut the support member, effectively securing the single battery cell within the battery pack while meeting the thermal management requirements for the battery cell and ensuring the thermal safety of the entire pack. Furthermore, the combination of the cooling plates and the support members can serve as structural components of the box, increasing the overall structural strength of the battery, thereby eliminating the need for horizontal and vertical beams within the box, resulting in high integration, reduced costs, improved box space utilization, and a lightweight design. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram showing a battery pack provided in an embodiment of the present application;

[0012] Figure 2 An exploded view of a battery pack provided in an embodiment of the present application is shown;

[0013] Figure 3 A structural diagram showing a cooling plate provided in an embodiment of the present application;

[0014] Figure 4 A side view of a cooling plate provided in an embodiment of the present application is shown;

[0015] Figure 5 shows one of the cross-sectional views of a battery pack provided in an embodiment of the present application;

[0016] Figure 6A second cross-sectional view of a battery pack provided in an embodiment of the present application is shown;

[0017] Figure 7 A third cross-sectional view of a battery pack provided in an embodiment of the present application;

[0018] Figure 8 A partial schematic diagram showing the interior of a battery pack provided in an embodiment of the present application;

[0019] Figure 9 A structural diagram of a battery pack provided in an embodiment of the present application is shown.

[0020] Reference numerals:

[0021] 100: Battery pack; 10: Battery box; 20: Thermal management structure; 11: Mounting cavity; 12: Upper cover; 13: Bottom plate; 14: Frame; 30: Single battery cell; 21: Cooling plate; 210: Cooling surface; 22: Support member; 31: First partition; 211: Cooling portion; 212: Connecting portion; 213: Support portion; 214: Cavity; 32: Second partition; 221: Liquid flow channel; 40: First connecting structure; 50: Locking accessory; 23: First mounting hole; 131: Second mounting hole; 60: Second connecting structure; 215: Cooling flow channel; 141: Mounting platform; Z: First direction; X: Second direction; Y: Third direction. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0024] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0025] In this application, the term "parallel" includes not only absolute parallelism but also the generally recognized parallelism in engineering practice, such as "parallel" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°. At the same time, "perpendicular" also includes not only absolute perpendicularity but also the generally recognized perpendicularity in engineering practice, such as "perpendicular" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles include not only absolute equality but also the generally recognized equality in engineering practice, which may include a certain error, such as a tolerance range of -1% to 1%.

[0026] like Figures 1 to 9 As shown, the battery pack 100 has a first direction Z and a second direction X intersecting each other. The battery pack 100 includes a battery case 10, a thermal management structure 20, and a plurality of single cells 30. The battery case 10 includes a top cover 12, a bottom plate 13, and a frame 14. The top cover 12 and the bottom plate 13 are respectively connected to opposite sides of the frame 14 in the first direction Z and, together with the frame 14, form a mounting cavity 11. The thermal management structure 20 and the plurality of single cells 30 are disposed in the mounting cavity 11. The thermal management structure 20 includes a plurality of cooling plates 21 spaced apart along the second direction X. The ends of the cooling plates 21 facing the bottom plate 13 are fixedly connected to the bottom plate 13. The cooling plates 21 have two opposing cooling surfaces 210 along the second direction X. Support members 22 are connected to the cooling surfaces 210. The single cells 30 are connected between the support members 22 and the top cover 12.

[0027] In the embodiment of the present application, since the upper cover 12 and the bottom plate 13 are respectively connected to opposite sides of the frame 14 in the first direction Z, the upper cover 12, the bottom plate 13, and the frame 14 can enclose a relatively closed mounting cavity 11, and the thermal management structure 20 and the plurality of battery cells 30 can be disposed in the mounting cavity 11 to form the 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 second direction X, it is equivalent to having a gap between two adjacent cooling plates 21 along the second direction X. A battery cell 30 can be disposed in each gap, so that the two opposing surfaces of the battery cell 30 along the second direction X can be cooled by the cooling plates 21, thereby achieving cooling and lowering of the temperature of the battery cell 30. Since the cooling plate 21 has two opposite cooling surfaces 210 along the second direction X, and the cooling surfaces 210 are connected to the support members 22, when the single battery 30 is placed in the gap between the two adjacent cooling plates 21, the single battery 30 can be abutted against the support member 22 on the side of the support member 22 facing away from the bottom plate 13, so that the single battery 30 can be supported by the support member 22, so that the single battery 30 can be better fixed inside the battery box 10, and the end of the cooling plate 21 facing the bottom plate 13 is fixedly connected to the bottom plate 13, so that the cooling plate 21 is also fixed inside the installation cavity 11, so that the support member 22 on the cooling plate 21 can further ensure that the single battery 30 is fixed more firmly inside the frame 14. That is, in the embodiment of the present application, multiple cooling plates 21 are spaced apart along the second direction X, and the cooling plates 21 are connected to the support members 22, so that when the single battery 30 is placed between two adjacent cooling plates 21, the single battery 30 can abut the support members 22, so that the support members 22 can support and fix the single battery 30, so that the single battery 30 is relatively stable inside the battery box 10, thereby avoiding the single battery 30 from colliding with each other inside the battery pack 100 due to unreliable fixation, causing the single battery 30 to be damaged, leak, and then cause short circuit, fire and other problems. That is, in the embodiment of the present application, the cooling plate 21 is connected to the support member 22, and then the support member 22 abuts against the single battery 30, which can effectively fix the single battery 30 and effectively improve the safety of the battery pack 100.

[0028] It should be noted that, in some embodiments, the upper cover 12 and the frame 14 can be an integrally molded structure, or the bottom plate 13 and the frame 14 can be an integrally molded structure, or the upper cover 12, the frame 14 and the bottom plate 13 can be integrally molded to improve the overall structural reliability of the battery pack 100.

[0029] Generally speaking, when the battery pack 100 is connected to an electrical device, the upper cover 12 is generally close to the electrical device, and the plane in which the upper cover 12 is located is perpendicular to the vertical direction. The first direction Z can be a vertical direction, which is collinear with the direction of gravity. When the battery pack 100 is connected to the electrical device, the single cell 30 can abut against the support member 22 under the action of gravity, so that the support member 22 supports the single cell 30.

[0030] In addition, in the embodiments of the present application, Figure 2 As shown, multiple cooling plates 21 are spaced apart along the second direction X, and single cells 30 are arranged between two adjacent cooling plates 21. Multiple single cells 30 can be arranged between two adjacent cooling plates 21, and the single cells 30 between two adjacent cooling plates 21 can be distributed along the third direction Y, so that the two cooling plates 21 can cool multiple battery cells. The number of single cells 30 located between two adjacent cooling plates 21 can be 4, 5, 8, etc. The specific number of single cells 30 between two adjacent cooling plates 21 is not specifically limited in this embodiment of the present application. Thus, multiple cooling plates 21 and multiple battery cells 30 can be interconnected to form a whole and accommodated in the battery box 10 to ensure effective thermal management of the single cells 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 second direction X and the third direction Y intersect, and an angle may be formed between the second direction X and the third direction Y, thereby enabling the arrangement of the cooling plates 21 and the single cells 30, so that the single cells 30 and the plurality of cooling plates 21 can be arranged in a predetermined manner within the battery pack 100. Specifically, the second direction X and the third direction Y are mutually perpendicular. In this case, the distribution direction of the cooling plates 21 is perpendicular to the distribution direction of the single cells 30 between two adjacent cooling plates 21, facilitating the arrangement of the cooling plates 21 and the single cells 30. Of course, the angle may also be other values, such as 60°, 70°, 76°, 80°, 95°, etc. The specific value of the angle between the second direction X and the third direction Y is not specifically limited in this embodiment of the present application.

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

[0033] In addition, in the embodiments of the present application, Figure 8As shown, a mounting platform 141 can be provided on the inner wall of the frame 14. The mounting platform 141 faces the cooling plate 21, and the mounting platform 141 is positioned opposite the support member 22 on the cooling plate 21. The single battery 30 located between the cooling plate 21 and the inner wall of the frame 14 abuts the support member 22 and the mounting platform 141, respectively, so that the single battery 30 can also be placed in the gap between the frame 14 and the cooling plate 21, thereby increasing the number of single battery cells 30 that can be accommodated inside the frame 14, which is conducive to increasing the capacity of the battery pack 100. Among them, a liquid flow channel is provided in the mounting platform 141, and the liquid flow channel is used to circulate the coolant. Therefore, when the single battery cell 30 abuts the mounting platform 141, the mounting platform 141 can cool the single battery cell 30, so that the single battery cell 30 is cooled not only by the cooling plate 21, but also by the mounting platform 141, thereby improving the cooling effect on the single battery cell 30.

[0034] In addition, if Figure 7 As shown, in the embodiment of the present application, a cooling channel 215 can be provided inside the cooling plate 21 for circulating coolant. This arrangement allows the coolant in the cooling cavity 214 to quickly dissipate the heat dissipated by the battery cells 30 when they are in contact with the cooling plate 21, after which the heat is transferred to the cooling plate 21. This allows the battery cells 30 to be cooled quickly.

[0035] Additionally, in some embodiments, Figure 5 As shown, there is a first gap 31 between the cooling plate 21 and the upper cover 12 .

[0036] Because there is a first gap 31 between the cooling plate 21 and the upper cover 12, it is equivalent to the end of the cooling plate 21 closest to the upper cover 12 not being connected to the upper cover 12, thereby blocking direct force transmission between the cooling plate 21 and the upper cover 12. Once the cooling plate 21 is subjected to force, the force applied to the cooling plate 21 is isolated by the first gap 31, preventing the force applied to the cooling plate 21 from being directly transmitted to the upper cover 12 and affecting the stability of the upper cover 12. Alternatively, the force applied to the upper cover 12 is also isolated by the first gap 31, preventing the cooling plate 21 from being affected by the upper cover 12 and causing damage to the cooling plate 21 structure, thereby ensuring the cooling effect. In other words, by providing the first gap 31 between the cooling plate 21 and the upper cover 12, the force transmission between the cooling plate 21 and the upper cover 12 can be effectively blocked, thereby effectively ensuring the structural stability of the upper cover 12 and the cooling plate 21, and facilitating the safety of the battery pack 100.

[0037] In some embodiments, the first interval 31 has a value range of 3-15 mm. It should be noted that the specific value of the first interval 31 can be set according to actual needs. For example, the value of the first interval 31 is any one of 3 mm, 5 mm, 7 mm, 9 mm, 11 mm, 13 mm, and 15 mm. This embodiment of the present application does not limit this.

[0038] In addition, in some embodiments, the cooling plate 21 is fixedly connected to the upper cover 12 .

[0039] Because the cooling plate 21 is fixedly connected to the upper cover 12, the opposite ends of the cooling plate 21 along the first direction Z are fixedly connected to the bottom plate 13 and the upper cover 12, respectively. As a result, the cooling plate 21 is simultaneously fixed to both the bottom plate 13 and the upper cover 12. The bottom plate 13 and the upper cover 12 are each connected to the frame 14. The bottom plate 13 and the upper cover 12 are fixed in position, which is equivalent to connecting the cooling plate 21 to a fixed component. This ensures that the cooling plate 21 is fixed in position, further preventing the cooling plate 21 from easily changing its position, thereby preventing the possibility of friction between the battery cells 30 caused by the change in the position of the cooling plate 21. In other words, by fixing the cooling plate 21 to the upper cover 12, the fixed position of the cooling plate 21 is further ensured. Furthermore, the fixed connection of the cooling plate 21 to the bottom plate 13 and the upper cover 12 effectively improves the rigidity and overall modality of the battery pack 100, thereby further enhancing the safety of the battery pack 100.

[0040] It should be noted that the cooling plate 21 can be fixedly connected to the upper cover 12 through a connecting member, and the connecting member can be a buffer member, such as adhesive glue or adhesive foam. Of course, the connecting member can also be other components with a connecting function, for example, the connecting member is a bolt. The specific type of the connecting member is not limited in the embodiment of the present application. Among them, when the connecting member is a buffer member, such as adhesive glue or adhesive foam, at this time, it is equivalent to filling the first gap 31 between the cooling plate 21 and the upper cover 12 with adhesive glue or adhesive foam, so that the adhesive glue and adhesive foam adhere the cooling plate 21 to the upper cover 12, so that the cooling plate 21 is fixedly connected to the upper cover 12. When the connecting member is a bolt, at this time, it can be connected to the cooling plate 21 through the bolt through the upper cover 12, so that the cooling plate 21 is fixedly connected to the upper cover 12.

[0041] Additionally, in some embodiments, Figure 4 As shown, the cooling plate 21 may include a cooling portion 211, a connecting portion 212 and a supporting portion 213. The cooling portion 211 is connected to the side of the connecting portion 212 facing the upper cover 12, and the supporting portion 213 is connected to the side of the connecting portion 212 facing the bottom plate 13. The single battery 30 is thermally connected to the cooling portion 211, the supporting portion 213 is connected to the bottom plate 13, and the support member 22 is connected to the connecting portion 212; a cavity 214 is provided inside the supporting portion 213.

[0042] Because the cooling portion 211 is connected to the side of the connecting portion 212 facing the upper cover 12, and the support portion 213 is connected to the side of the connecting portion 212 facing the bottom plate 13, the support portion 213 is connected to the bottom plate 13. Therefore, the support portion 213 is equivalent to being fixed to the bottom plate 13, thereby fixing the connecting portion 212 and the cooling plate 21, thereby fixing the cooling plate 21. Because the single battery 30 is thermally connected to the cooling portion 211, once the single battery 30 generates heat, the heat of the single battery 30 can be directly transferred to the cooling portion 211, so that the cooling portion 211 can effectively dissipate heat from the single battery 30. Because the support portion 213 has a cavity 214 within it, once the base plate 13 is subjected to force, the force is transmitted to the support portion 213. The cavity 214 within the support portion 213 absorbs at least part of the force, reducing the force transmitted to the connection portion 212 and the support member 22. Consequently, the individual cells 30 are subjected to less force, which improves the safety of the battery pack 100. In other words, by connecting the support portion 213 to the base plate 13 and providing the cavity 214 within the support portion 213, the individual cells 30 are thermally connected to the cooling portion 211, effectively cooling the individual cells 30 while ensuring that the individual cells 30 are subjected to less force, thereby improving the safety of the battery pack 100. Furthermore, the provision of the cavity 214 in the support portion 213 reduces weight and material requirements, thereby improving the gravimetric energy density of the battery pack 100.

[0043] In some embodiments, reinforcing ribs may be provided in the cavity 214 to ensure the structural strength of the support portion 213 .

[0044] It should be noted that the single battery 30 and the cooling portion 211 may be connected via a thermally conductive adhesive, thereby enabling thermal connection between the single battery 30 and the cooling portion 211 .

[0045] Additionally, in some embodiments, Figure 6 As shown, there is a second gap 32 between the support member 22 and the bottom plate 13 .

[0046] Because the support member 22 and the bottom plate 13 have a second gap 32, when the support member 22 supports the individual cells 30, a gap can also be provided between the individual cells 30 and the bottom plate 13, reserving a buffer space between the individual cells 30 and the bottom plate 13. This prevents the impact force from being directly transmitted to the individual cells 30 and causing damage to the battery pack 100 when a foreign object strikes the battery pack 100 from the bottom, thereby improving the protection of the individual cells 30. In other words, by providing the second gap between the support member 22 and the bottom plate 13, the individual cells 30 are protected from excessive force, thereby improving the safety of the battery pack 100.

[0047] The value range of the second interval 32 is 3-30 mm. It should be noted that the specific value of the second interval 32 can be set according to actual needs. For example, the value of the second interval 32 is 3 mm, 10 mm, 20 mm, or 25 mm. This embodiment of the present application does not limit this.

[0048] Additionally, in some embodiments, Figure 6 As shown, the support member 22 has a liquid flow channel 221 inside, and the liquid flow channel 221 is used to circulate the cooling liquid.

[0049] Because the support member 22 has a liquid flow channel 221 inside, coolant can flow through the liquid flow channel 221. Therefore, when the single battery cell 30 contacts the support member 22, the portion of the surface of the single battery cell 30 in contact with the support member 22 can be cooled by the support member 22. As a result, the single battery cell 30 is cooled not only by the cooling plate 21 but also by the support member 22. This increases the heat exchange area of the battery cell 30, effectively cooling the single battery cell 30 and preventing the single battery cell 30 from overheating during operation, thereby affecting the safety of the battery pack 100. In other words, by providing the liquid flow channel 221 inside the support member 22, the cooling effect on the single battery cell 30 can be further improved, thereby improving the safety of the battery pack 100.

[0050] It should be noted that the number of liquid flow channels 221 inside the support member 22 can be set according to actual needs. For example, the number of liquid flow channels 221 is 4, and for another example, the number of liquid flow channels 221 is 6. This embodiment of the present application does not limit this.

[0051] Additionally, in some embodiments, the support member 22 is connected to the base plate 13 .

[0052] Since the support member 22 is connected to the base plate 13 , the support member 22 can be fixed by the base plate 13 , so that the support member 22 is not only fixed by the cooling plate 21 , but also fixed by the base plate 13 , so that the support member 22 can be further fixed in position, thereby enabling the support member 22 to better support the single battery 30 .

[0053] It should be noted that a component such as adhesive glue or adhesive foam can be provided between the support member 22 and the bottom plate 13 to connect the support member 22 to the bottom plate 13. Of course, the support member 22 and the bottom plate 13 can also be connected by bolts, that is, the bolts pass through the bottom plate 13 and are connected to the support member 22, so that the support member 22 and the bottom plate 13 are connected. The specific method of connecting the support member 22 and the bottom plate 13 is not limited in this embodiment of the application.

[0054] Additionally, in some embodiments, Figure 6As shown, a first connection structure 40 is provided between the cooling plate 21 and the bottom plate 13 , and the cooling plate 21 and the bottom plate 13 are connected via the first connection structure 40 .

[0055] Since there is a first connecting structure 40 between the cooling plate 21 and the bottom plate 13, the cooling plate 21 and the bottom plate 13 can be connected through the first connecting structure 40, so that the cooling plate 21 can be fixed on the bottom plate 13 through the first connecting structure 40, so that the cooling plate 21 is fixed by the bottom plate 13, ensuring that the cooling plate 21 is not easy to shake, and further ensuring that the single battery 30 is not easy to shake.

[0056] In the embodiment of the present application, the first connecting structure 40 may be adhesive glue or adhesive foam. Specifically, the adhesive glue or adhesive foam may be disposed between the cooling plate 21 and the bottom plate 13 so that the adhesive glue or adhesive foam adheres the cooling plate 21 to the bottom plate 13, thereby fixing the position of the cooling plate 21.

[0057] It should be noted that when the cooling plate 21 includes the supporting portion 213 , the connecting portion 212 and the cooling portion 211 , a first connecting structure 40 is provided between the supporting portion 213 and the bottom plate 13 , and the supporting portion 213 is connected to the bottom plate 13 via the first connecting structure 40 .

[0058] Additionally, in some embodiments, Figure 5 or Figure 6 As shown, the battery pack 100 also includes a locking accessory 50. A first mounting hole 23 is provided on the surface of the cooling plate 21 facing the base plate 13. A second mounting hole 131 is provided on the base plate 13. The first mounting hole 23 is opposite to the second mounting hole 131. The locking accessory 50 is passed through the first mounting hole 23 and the second mounting hole 131 and connects the cooling plate 21 and the base plate 13.

[0059] Because the first mounting hole 23 is provided on the surface of the cooling plate 21 facing the bottom plate 13, and the second mounting hole 131 is provided on the bottom plate 13, when the bottom plate 13 and the cooling plate 21 need to be connected, the locking member 50 can be directly passed through the second mounting hole 131 on the bottom plate 13 and the first mounting hole 23 on the cooling plate 21, so that the locking member 50 can directly connect the cooling plate 21 to the bottom plate 13. That is, by providing the locking member 50, when the cooling plate 21 and the bottom plate 13 need to be connected, they can be directly connected through the locking member 50, thereby improving the connection efficiency of the cooling plate 21 and the bottom plate 13 and ensuring a relatively firm connection between the cooling plate 21 and the bottom plate 13.

[0060] It should be noted that the locking accessory 50 may be a bolt. Of course, the locking accessory 50 may also be of other types, for example, the locking accessory 50 may be a pin. The specific type of the locking accessory 50 is not limited in this embodiment of the present application.

[0061] In addition, in some embodiments, a first connection structure 40 is further provided between the cooling plate 21 and the bottom plate 13 , and the locking member 50 is passed through the first connection structure 40 .

[0062] This arrangement ensures that the cooling plate 21 and the base plate 13 are connected not only via the first connecting structure 40 but also via the locking member 50. This further ensures that the cooling plate 21 is firmly fixed to the base plate 13, preventing the cooling plate 21 from easily moving, thereby further preventing the individual batteries 30 from moving. This improves the safety of the battery pack 100. Furthermore, when the first connecting structure 40 is adhesive or foam, it can further improve the sealing between the cooling plate 21, the base plate 13, and the locking member 50.

[0063] Additionally, in some embodiments, Figure 5 or Figure 6 As shown, a second connection structure 60 is provided between the single battery 30 and the upper cover 12 , and the single battery 30 and the upper cover 12 are connected via the second connection structure 60 ; wherein the second connection structure 60 may be adhesive glue or adhesive foam.

[0064] Because the second connecting structure 60 is provided between the individual cells 30 and the upper cover 12, the individual cells 30 can be connected to the upper cover 12 via the second connecting structure 60. This not only supports the individual cells 30 by the support member 22, ensuring a relatively stable position of the individual cells 30, but also secures the individual cells 30 by the upper cover 12, further ensuring that the individual cells 30 are not easily shaken. In other words, by providing the second connecting structure 60 between the individual cells 30 and the upper cover 12, the stability of the individual cells 30 can be further ensured, thereby further improving the safety of the battery pack 100. Furthermore, the second connecting structure 60 is made of adhesive glue or adhesive foam, which facilitates bonding of the individual cells 30 to the upper cover 12, thereby making the connection between the individual cells 30 and the upper cover 12 relatively convenient.

[0065] In addition, in some embodiments, the support member 22 and the cooling plate 21 are integrally formed. This arrangement allows the support member 22 and the cooling plate 21 to be integrated, thereby increasing the strength of the support member 22 and the cooling plate 21 and improving the service life of the battery pack 100.

[0066] It should be noted that the support member 22 and the cooling plate 21 may be formed into an integral structure through a die-casting process or other integral molding process.

[0067] In the embodiment of the present application, since the upper cover 12 and the bottom plate 13 are respectively connected to opposite sides of the frame 14 in the first direction Z, the upper cover 12, the bottom plate 13, and the frame 14 can enclose a relatively closed mounting cavity 11, and the thermal management structure 20 and the plurality of battery cells 30 can be disposed in the mounting cavity 11 to form the 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 second direction X, it is equivalent to having a gap between two adjacent cooling plates 21 along the second direction X. A battery cell 30 can be disposed in each gap, so that the two opposing surfaces of the battery cell 30 along the second direction X can be cooled by the cooling plates 21, thereby achieving cooling and lowering of the temperature of the battery cell 30. Since the cooling plate 21 has two opposite cooling surfaces 210 along the second direction X, and the cooling surfaces 210 are connected to the support members 22, when the single battery 30 is placed in the gap between the two adjacent cooling plates 21, the single battery 30 can be abutted against the support member 22 on the side of the support member 22 facing away from the bottom plate 13, so that the single battery 30 can be supported by the support member 22, so that the single battery 30 can be better fixed inside the battery box 10, and the end of the cooling plate 21 facing the bottom plate 13 is fixedly connected to the bottom plate 13, so that the cooling plate 21 is also fixed inside the installation cavity 11, so that the support member 22 on the cooling plate 21 can further ensure that the single battery 30 is fixed more firmly inside the frame 14. That is, in the embodiment of the present application, multiple cooling plates 21 are spaced apart along the second direction X, and the cooling plates 21 are connected to the support members 22, so that when the single battery 30 is placed between two adjacent cooling plates 21, the single battery 30 can abut the support members 22, so that the support members 22 can support and fix the single battery 30, so that the single battery 30 is relatively stable inside the battery box 10, thereby avoiding the single battery 30 from being damaged, leaking, and causing short circuits, fires, and other problems due to unreliable fixation. That is, in the embodiment of the present application, the cooling plates 21 are connected to the support members 22, and then the support members 22 abut against the single battery 30, which can effectively fix the single battery 30, and thus effectively improve the safety of the battery pack 100.

[0068] The embodiment of the present application provides an electric device, which includes the battery pack 100 in any of the above embodiments. The battery pack 100 is used to provide electric energy.

[0069] It should be noted that the electrical equipment provided in the embodiments of the present application may be a vehicle, a power-assisted bicycle, an energy storage system that uses energy such as wind energy or solar energy, etc. The embodiments of the present application do not specifically limit the specific form of the electrical equipment.

[0070] In some embodiments, the battery pack 100 is connected to the electrical device via the thermal management structure 20, or the battery pack 100 is connected to the electrical device via the upper cover 12, so that the weight of the battery pack is directly transferred to the electrical device via the thermal management structure 20 or the upper cover, thereby improving the connection reliability between the battery pack and the electrical device.

[0071] Of course, in other embodiments, the battery pack may also be connected to the electrical device via the thermal management structure 20 and the upper cover 12 at the same time.

[0072] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0073] Although alternative embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including alternative embodiments and all changes and modifications that fall within the scope of the present invention.

[0074] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity from another, and do not necessarily require or imply any actual relationship or order between these entities. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that an article or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the article or terminal device comprising the element.

[0075] The above is a detailed introduction to the technical solution provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. At the same time, for those skilled in the art, according to the principles and implementation methods of the present application, there may be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A battery pack having a first direction and a second direction intersecting each other, characterized in that: The battery pack includes: a battery box, a thermal management structure, and a plurality of single cells. The battery box includes an upper cover, a bottom plate, and a frame. The upper cover and the bottom plate are respectively connected to opposite sides of the frame in the first direction and enclosed with the frame to form an installation cavity. The thermal management structure and the plurality of single cells are both arranged in the installation cavity. The thermal management structure includes a plurality of cooling plates, the plurality of cooling plates being spaced apart along the second direction, the cooling plates being fixedly connected to the bottom plate at one end facing the bottom plate, the cooling plates having two opposing cooling surfaces along the second direction, the cooling surfaces being connected to support members, and the single battery being connected between the support members and the upper cover; The cooling plate includes a cooling part, a connecting part and a supporting part. The cooling part is connected to the side of the connecting part facing the upper cover, and the supporting part is connected to the side of the connecting part facing the bottom plate. The single battery is thermally connected to the cooling part, the supporting part is connected to the bottom plate, and the supporting member is connected to the connecting part.

2. The battery pack according to claim 1, wherein: A first gap is defined between the cooling plate and the upper cover.

3. The battery pack according to claim 1, wherein: The cooling plate is fixedly connected to the upper cover.

4. The battery pack according to claim 1, wherein: A cavity is provided inside the supporting portion.

5. The battery pack according to claim 1, wherein: A second interval is defined between the support member and the bottom plate.

6. The battery pack according to claim 5, characterized in that: The support member has a liquid flow channel inside, and the liquid flow channel is used for circulating cooling liquid.

7. The battery pack according to claim 1, wherein: The support member is connected to the bottom plate.

8. The battery pack according to claim 1, wherein: A first connection structure is provided between the cooling plate and the bottom plate, and the cooling plate and the bottom plate are connected via the first connection structure.

9. The battery pack according to claim 1 or 8, characterized in that: The battery pack also includes a locking accessory. A first mounting hole is provided on the surface of the cooling plate facing the base plate, and a second mounting hole is provided on the base plate. The first mounting hole is opposite to the second mounting hole. The locking accessory is passed through the first mounting hole and the second mounting hole and connects the cooling plate and the base plate.

10. The battery pack according to claim 1, wherein: A second connection structure is provided between the single battery and the upper cover, and the single battery and the upper cover are connected via the second connection structure.

11. The battery pack according to claim 1, wherein: The support member and the cooling plate are an integrally formed structure.

12. An electrical device, characterized in that: A battery pack comprising the battery pack according to any one of claims 1 to 11, wherein the battery pack is used to provide electrical energy.

13. The electrical equipment according to claim 12, characterized in that: The battery pack is connected to the electrical device via the thermal management structure and / or the upper cover.

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