Battery pack and electric device

Abstract

The invention discloses a battery pack and a power utilization device, and belongs to the technical field of batteries, the battery pack comprises a battery box body, a battery module and a BDU assembly, the battery box body is provided with an accommodating cavity, the battery module is arranged in the accommodating cavity, and the battery module comprises a plurality of battery cells; the BDU assembly comprises a BDU support, a BDU liquid cooling plate and a BDU body, the BDU support is connected with the battery box body, at least part of the BDU support extends to the side, in the Z direction, of the battery module, the BDU body is arranged on the side, away from the battery module, of part of the BDU support in the Z direction, the BDU liquid cooling plate is arranged between the BDU support and the BDU body, the interior of the BDU liquid cooling plate is used for circulating cooling liquid, and the BDU liquid cooling plate is used for cooling the battery module. The BDU liquid cooling plate abuts against the BDU body so as to achieve heat exchange of the BDU body. And the Z direction is the height direction of the battery box body. And the battery box body can provide support for the BDU bracket, so that the structural strength of the BDU bracket is ensured, and more stable support is provided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery pack and an electric device. BACKGROUND

[0002] The battery disconnect unit (BDU) is a device for disconnecting and connecting high-voltage electricity of the battery, and is a working unit for high-voltage distribution, disconnection and short-circuit protection of the battery system, which plays a crucial role in the safety of the battery pack. Limited by the overall arrangement of the battery pack, the internal space is limited. In order to accommodate more battery cells, the battery pack arranges battery cells in multiple rows in one layer of space, and the BDU is placed on the second layer, that is, the BDU is placed above the battery cells. The liquid cooling plate arranged at the bottom of the BDU can not only dissipate heat from the BDU but also provide support for the BDU. However, the support strength of the liquid cooling plate is poor, and the liquid cooling plate is prone to deformation, which may cause liquid leakage and other safety problems. SUMMARY

[0003] The present application provides a battery pack and an electric device to solve the technical problem of the prior art that the BDU is arranged above the battery cells and the liquid cooling plate arranged at the bottom of the BDU is not convenient to support.

[0004] As conceived above, the technical solution adopted by the present application is:

[0005] A battery pack, comprising:

[0006] A battery box body having a receiving cavity;

[0007] A battery module arranged in the receiving cavity, the battery module comprising a plurality of battery cells;

[0008] A BDU assembly comprising a BDU support, a BDU liquid cooling plate and a BDU body, the BDU support being connected to the battery box body, at least part of the BDU support extending to one side of the battery module along a Z direction, the BDU body being arranged on the side of part of the BDU support away from the battery module along the Z direction, the BDU liquid cooling plate being arranged between the BDU support and the BDU body, the inside of the BDU liquid cooling plate being used for circulating cooling liquid, and the BDU liquid cooling plate abutting against the BDU body to achieve heat exchange of the BDU body; the Z direction being the height direction of the battery box body.

[0009] As a preferred, the BDU support comprises a support body and a support leg, at least part of the support body being located on one side of the battery module along the Z direction, the BDU liquid cooling plate being arranged on the support body, the support leg being connected to the support body by bending, and the support body and / or the support leg being connected to the battery box body.

[0010] Preferably, the battery housing includes a first side beam and a first crossbeam. The first side beam is disposed on one side of the battery module in the X direction, and the first crossbeam is disposed inside the battery housing to form an electrical compartment and a battery compartment for mounting the battery module. The support leg is located inside the electrical compartment and connected to the first side beam. A portion of the support body spans the electrical compartment and the battery compartment and is connected to the first crossbeam. The X direction is the length direction of the battery housing.

[0011] Preferably, a plurality of first support frames are fixedly provided on the top of the first crossbeam, and the support body is connected to the first support frame through a first locking member; and / or, the end of the support foot away from the support body is bent and extended with a connecting part, and the connecting part is connected to the first side beam through a second locking member.

[0012] Preferably, the support feet are provided in multiple ways, and the multiple support feet are spaced apart along the Y direction of the support body, with a gap formed between adjacent support feet. A BMS component is provided on the first crossbeam, and the gap is used to pass through the wiring harness of the BMS component; the Y direction is the width direction of the battery box.

[0013] Preferably, the support body includes a first support portion and a second support portion arranged along the Y direction, at least a portion of the first support portion extending along the X direction to one side of the battery compartment, the first support portion being used to support the BDU liquid cooling plate, and the second support portion being used to support the high-voltage plug-in.

[0014] Preferably, a thermal insulation pad is provided between the BDU liquid cooling plate and the BDU bracket. The BDU bracket is recessed in a limiting groove on the side of the BDU liquid cooling plate along the Z direction. The thermal insulation pad is provided in a limiting protrusion on the side of the BDU bracket along the Z direction. The limiting protrusion is inserted into the limiting groove along the Z direction.

[0015] Preferably, the battery housing includes a cover, at least a portion of which protrudes in a direction away from the battery module to form a casing, and the BDU body is disposed inside the casing.

[0016] Preferably, the BDU assembly further includes a thermally conductive pad disposed between the BDU body and the BDU liquid cooling plate; and / or, the BDU assembly further includes an insulating pad disposed between the BDU bracket and the battery module.

[0017] An electrical device includes a battery pack as described above.

[0018] The beneficial effects of this invention are:

[0019] The battery pack proposed in this invention has a battery housing with a cavity in which the battery module is disposed. A battery unit (BDU) bracket is connected to the battery housing, with at least a portion of the BDU bracket extending to one side of the battery module along the Z-direction. The BDU body is disposed along the Z-direction on the side of the portion of the BDU bracket away from the battery module. A BDU liquid cooling plate is disposed between the BDU bracket and the BDU body. The interior of the BDU liquid cooling plate is used for coolant flow, and the BDU liquid cooling plate abuts against the BDU body to achieve heat exchange. The battery housing provides support for the BDU bracket, ensuring its structural strength and enabling the BDU bracket to provide more stable support for the BDU liquid cooling plate and the BDU body. The BDU bracket has a simple structure, is firmly installed, and is not prone to failure. The fact that at least a portion of the BDU bracket extends to one side of the battery module along the Z-direction fully utilizes the space of the battery module along the Z-direction, allowing more battery cells to be accommodated in the same layer. The interior of the BDU liquid cooling plate is used for coolant flow to provide heat dissipation for the BDU body, ensuring the performance of the BDU assembly. Attached Figure Description

[0020] Figure 1 This is a first schematic diagram of a portion of the battery pack structure provided in an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Enlarged view of point A;

[0022] Figure 3 This is a second schematic diagram of a portion of the battery pack structure provided in an embodiment of the present invention;

[0023] Figure 4 yes Figure 3 Enlarged view of point B;

[0024] Figure 5 This is a partial exploded view of the battery pack structure provided in an embodiment of the present invention;

[0025] Figure 6 This is a first schematic diagram of the BDU component provided in an embodiment of the present invention;

[0026] Figure 7 This is a second schematic diagram of the BDU component provided in an embodiment of the present invention;

[0027] Figure 8 This is an exploded view of the BDU component provided in an embodiment of the present invention;

[0028] Figure 9 This is a partial top view of the battery pack provided in an embodiment of the present invention;

[0029] Figure 10 yes Figure 9 CC-direction sectional view;

[0030] Figure 11 yes Figure 10 A magnified view of a portion of the image;

[0031] Figure 12 This is a schematic diagram of the structure of the BDU support provided in an embodiment of the present invention;

[0032] Figure 13 This is a schematic diagram of the structure of the heat insulation pad provided in an embodiment of the present invention;

[0033] Figure 14 This is a schematic diagram of the structure of the first support frame provided in an embodiment of the present invention.

[0034] In the picture:

[0035] 10. Battery housing; 101. Receiving cavity; 1011. Electrical compartment; 1012. Battery compartment; 11. First side beam; 111. Mounting part; 12. First crossbeam; 13. First support frame; 131. First frame; 132. First connecting plate; 14. First locking element; 15. Second locking element;

[0036] 20. Battery module; 21. Battery cell;

[0037] 30. BDU assembly; 31. BDU bracket; 311. Support body; 3111. First support part; 3112. Second support part; 312. Support foot; 3121. Connecting part; 313. Notch; 314. Limiting groove; 32. BDU liquid cooling plate; 321. Water inlet connector; 322. Water outlet connector; 33. BDU body; 331. Clearance space; 34. High-pressure plug; 35. Thermal insulation pad; 351. Limiting protrusion; 36. Thermally conductive rubber pad; 37. Insulating pad; 38. Second support frame; 39. Third locking component;

[0038] 40. BMS components. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] See Figures 1 to 14 This embodiment provides a battery pack, including a battery housing 10, a battery module 20, and a BDU assembly 30. The battery housing 10 has a receiving cavity 101, and the battery module 20 is disposed within the receiving cavity 101. The battery module 20 includes multiple battery cells 21. The BDU assembly 30 includes a BDU bracket 31, a BDU liquid cooling plate 32, and a BDU body 33. The BDU bracket 31 is connected to the battery housing 10, and at least a portion of the BDU bracket 31 extends to one side of the battery module 20 along the Z direction. The BDU body 33 is disposed along the Z direction on the side of the portion of the BDU bracket 31 away from the battery module 20. The BDU liquid cooling plate 32 is disposed between the BDU bracket 31 and the BDU body 33. The interior of the BDU liquid cooling plate 32 is used for the flow of coolant, and the BDU liquid cooling plate 32 abuts against the BDU body 33 to achieve heat exchange with the BDU body 33. The Z direction is the height direction of the battery housing 10.

[0044] The battery housing 10 provides support for the BDU bracket 31, ensuring the structural strength of the BDU bracket 31 and enabling the BDU bracket 31 to provide more stable support for the BDU liquid cooling plate 32 and the BDU body 33. The BDU bracket 31 has a simple structure, is firmly installed, and is not prone to failure. At least part of the BDU bracket 31 extends to one side of the battery module 20 along the Z direction, making full use of the space of the battery module 20 along the Z direction, so that the layer where the battery module 20 is located can accommodate more cells 21. The interior of the BDU liquid cooling plate 32 is used for circulating coolant to provide heat dissipation for the BDU body 33 and ensure the performance of the BDU assembly 30.

[0045] Taking the battery housing 10 as a reference, the X, Y, and Z directions are defined. In this embodiment, the X direction is the length direction of the battery housing 10, the Y direction is the width direction of the battery housing 10, and the Z direction is the height direction of the battery housing 10. Multiple battery cells 21 are arranged in a row along the X direction, and multiple rows of battery cells 21 are arranged at intervals along the Y direction.

[0046] The battery housing 10 includes side beams, cross beams, and longitudinal beams. The side beams enclose a receiving cavity 101, the cross beams are disposed within the receiving cavity 101 and extend along the Y direction, and the longitudinal beams are disposed within the receiving cavity 101 and extend along the X direction. Exemplarily, the battery housing 10 includes a first side beam 11 and a first cross beam 12. The first side beam 11 is disposed on one side of the battery module 20 in the X direction, and the first cross beam 12 is disposed within the battery housing 10, dividing the receiving cavity 101 into an electrical compartment 1011 and a battery compartment 1012 for mounting the battery module 20. By providing the first cross beam 12, the receiving cavity 101 is divided into the electrical compartment 1011 and the battery compartment 1012, wherein the electrical compartment 1011 is located between the first side beam 11 and the first cross beam 12, and the battery compartment 1012 is located on the side of the first cross beam 12 away from the electrical compartment 1011. The electrical compartment 1011 can accommodate electrical components such as the BMS assembly 40.

[0047] The BDU bracket 31 includes a support body 311 and support feet 312. At least a portion of the support body 311 is located on one side of the battery module 20 along the Z-direction. The BDU liquid cooling plate 32 is disposed on the support body 311. The support feet 312 are bent and connected to the support body 311. The support body 311 and / or the support feet 312 are connected to the battery housing 10. By setting the support body 311, it is convenient to provide large-area support for the BDU liquid cooling plate 32. The setting of the support feet 312 facilitates fixing the BDU bracket 31 in the required position, making reasonable use of space. For example, the support feet 312 are located on the side of the support body 311 away from the battery module 20 to prevent the support feet 312 from interfering with the battery module 20, and also to provide sufficient operating space for installers, improving assembly convenience.

[0048] In some embodiments, the support body 311 is connected to the battery housing 10, and the support foot 312 can be supported at the bottom of the accommodating cavity 101. In some embodiments, the support foot 312 is connected to the battery housing 10, and the support body 311 can be suspended relative to the crossbeam. In this embodiment, both the support body 311 and the support foot 312 are connected to the battery housing 10, increasing the number of connection points and making the connection more stable.

[0049] For example, the battery housing 10 includes a first side beam 11 and a first crossbeam 12. The first side beam 11 is disposed on one side of the battery module 20 in the X direction. The first crossbeam 12 is disposed within the battery housing 10 such that the accommodating cavity 101 forms an electrical compartment 1011 and a battery compartment 1012 for mounting the battery module 20. A support foot 312 is located within the electrical compartment 1011 and connected to the first side beam 11. A portion of the support body 311 spans the electrical compartment 1011 and the battery compartment 1012 and is connected to the first crossbeam 12. The support foot 312 is connected to the first side beam 11, and the support body 311 is connected to the first crossbeam 12. That is, the support body 311 and the support foot 312 are connected at different positions in the battery housing 10, so that the BDU bracket 31 is subjected to balanced force and ensures a firm installation. By connecting the support body 311 to the first crossbeam 12 and the support foot 312 to the first side beam 11, two fixed structures are formed at intervals along the X direction. The stress points are distributed on different load-bearing components of the battery box 10. Compared with single-point fixation, this improves vibration resistance and meets the structural stability requirements under extreme conditions such as vehicle bumps and sudden braking. At the same time, the support body 311 extends beyond the thickness direction of the first crossbeam 12, which increases the area of ​​the support body 311, thereby improving the support stability and heat exchange effect of the BDU.

[0050] Multiple first support frames 13 are fixedly mounted on the top of the first crossbeam 12, and the support body 311 is connected to the first support frame 13 via a first locking member 14. The first support frames 13 serve as a transition point between the first crossbeam 12 and the support body 311 to accommodate spatial layout. For example, along the Z-direction, the end of the battery module 20 closest to the support body 311 is higher than the end of the first crossbeam 12 closest to the support body 311. To ensure a certain distance between the support body 311 and the battery module 20, the support body 311 and the first crossbeam 12 are spaced apart. Therefore, the first support frames 13 facilitate a smooth connection between the first crossbeam 12 and the support body 311. The first support frames 13 also prevent the support body 311 from directly contacting the first crossbeam 12, thus avoiding any impact on the heat exchange effect on the BDU body.

[0051] The first support frame 13 and the first crossbeam 12 can be connected by a locking device or by welding. For example, the first support frame 13 is welded to the first crossbeam 12 to increase structural strength and reduce the number of parts. The first locking device 14 can be a bolt. To facilitate bolt connection of the first support frame 13, a nut is provided on the first support frame 13, and the nut can be fixed to the first support frame 13 by welding.

[0052] The shape of the first support frame 13 can be configured as needed. For example, such as... Figure 14 As shown, the first support frame 13 includes a first frame body 131 extending in a U-shape. Both ends of the first frame body 131 are provided with first connecting plates 132 connected at an angle. The first frame body 131 is used to install the first locking member 14. The first connecting plates 132 are connected to the first crossbeam 12. The U-shaped extension of the first frame body 131 facilitates the housing of the first locking member 14. Part of the first locking member 14 is located within the U-shaped cavity formed by the first frame body 131. The nut is connected to the first frame body 131 and can be located within the U-shaped cavity or embedded in the first frame body 131.

[0053] The end of the support leg 312 away from the support body 311 is bent and extended to form a connecting portion 3121, which is connected to the first side beam 11 via a second locking member 15. The connecting portion 3121 has a mounting hole for the second locking member 15 to pass through, facilitating the connection between the support leg 312 and the first side beam 11. Exemplarily, the support leg 312 extends relative to the support body 311 towards the battery module 20, and the connecting portion 3121 extends relative to the support leg 312 away from the battery module 20. Exemplarily, the first side beam 11 has a mounting portion 111 on the side near the electrical compartment 1011, with a mounting hole for the second locking member 15 to pass through, allowing the connecting portion 3121 to connect to the mounting portion 111. In this embodiment, the second locking member 15 can be a bolt, and the mounting part 111 is provided with a threaded hole or a rivet nut. The second locking member 15 passes through the connecting part 3121 to connect with the threaded hole or the rivet nut.

[0054] Multiple support feet 312 are provided, spaced apart along the Y direction of the support body 311. A notch 313 is formed between adjacent support feet 312. A BMS component 40 is mounted on the first crossbeam 12, and the notch 313 is used to pass through the wiring harness of the BMS component 40. Utilizing the notches 313 between adjacent support feet 312 to pass through the wiring harness makes full use of space and ensures structural compactness. When multiple support feet 312 are provided, there are multiple corresponding notches 313, allowing multiple wiring harnesses to be passed through different notches 313, avoiding tangling and friction between the wiring harnesses and improving service life.

[0055] Exemplarily, the support body 311 includes a first support portion 3111 and a second support portion 3112 arranged along the Y direction. At least a portion of the first support portion 3111 extends along the X direction to one side of the battery compartment 1012. The first support portion 3111 supports the BDU liquid cooling plate 32, and the second support portion 3112 supports the high-voltage plug-in 34. By providing the first support portion 3111 and the second support portion 3112, different components can be adapted, improving overall integration. The first support portion 3111 supports the BDU liquid cooling plate 32, and the BDU body 33 is disposed on the side of the BDU liquid cooling plate 32 away from the first support portion 3111. The second support portion 3112 supports the high-voltage plug-in 34. Exemplarily, the high-voltage plug-in 34 is disposed along the Z direction on the second support portion 3112, facilitating installation and disassembly and making full use of the space in the Z direction.

[0056] The first support portion 3111 has a width in the X direction greater than the width of the BDU body 33 in the X direction, providing more stable support. Since the high-voltage plug 34 is smaller than the BDU body 33, the width of the first support portion 3111 in the X direction is greater than the width of the second support portion 3112 in the X direction, reducing space occupation. Exemplarily, the second support portion 3112 is connected to the first crossbeam 12 by a first support frame 13, and the second support portion 3112 does not extend into the battery compartment 1012.

[0057] In some embodiments, the BDU liquid cooling plate 32 is in contact with the BDU bracket 31 and the two are directly connected by a locking member. In some embodiments, a thermal insulation pad 35 is provided between the BDU liquid cooling plate 32 and the BDU bracket 31 to prevent the cold energy of the BDU liquid cooling plate 32 from being transferred to the BDU bracket 31 and lost, thus ensuring the heat transfer efficiency between the BDU liquid cooling plate 32 and the BDU body 33. Since the first support portion 3111 supports the BDU liquid cooling plate 32, the thermal insulation pad 35 is disposed between the BDU liquid cooling plate 32 and the first support portion 3111.

[0058] The thickness of the insulation pad 35 can be set according to actual needs. The insulation pad 35 creates a gap between the BDU liquid cooling plate 32 and the BDU bracket 31. For example, multiple second support frames 38 are provided between the BDU liquid cooling plate 32 and the BDU bracket 31, and the BDU liquid cooling plate 32 is connected to the second support frames 38 through a third locking member 39. By providing the second support frames 38, it is easy to connect the BDU liquid cooling plate 32 and the BDU bracket 31, and the insulation pad 35 can be avoided to prevent interference and adapt to the spatial layout.

[0059] The second support frame 38 and the BDU bracket 31 can be connected by a locking device or by welding. For example, the second support frame 38 is welded to the BDU bracket 31 to increase structural strength and reduce the number of parts. The third locking device 39 can be a bolt. To facilitate bolt connection of the second support frame 38, a nut is provided on the second support frame 38, and the nut can be fixed to the second support frame 38 by welding.

[0060] The shape of the second support frame 38 can be configured as needed. The second support frame 38 can have the same structure as the first support frame 13. Exemplarily, the second support frame 38 includes a second frame extending in a U-shape, with second connecting plates provided at both ends of the second frame. The second frame is used to support the third locking member 39, and the second connecting plates are connected to the BDU bracket 31. The U-shaped extension of the second frame facilitates the accommodation of the third locking member 39. Part of the third locking member 39 is located within the U-shaped cavity formed by the second frame. The nut is connected to the second frame and can be located within the U-shaped cavity or embedded in the second frame.

[0061] Multiple second support frames 38 are provided, and a third locking member 39 is provided for each second support frame 38. Therefore, there are multiple third locking members 39. Among the multiple third locking members 39, some third locking members 39 are connected to the BDU liquid cooling plate 32 and the second support frame 38, and some third locking members 39 are connected to the BDU body 33, the BDU liquid cooling plate 32 and the second support frame 38.

[0062] The BDU liquid cooling plate 32 has a water inlet connector 321 and a water outlet connector 322. A clearance space 331 is provided on the BDU body 33 corresponding to the positions of the water inlet connector 321 and the water outlet connector 322 to prevent interference. The water inlet pipe connected to the water inlet connector 321 and the water outlet pipe connected to the water outlet connector 322 can be routed through the notch 313 between adjacent support legs 312 to make full use of the space.

[0063] In some embodiments, the insulation pad 35 and the BDU bracket 31 are in planar contact, and the insulation pad 35 is clamped between the BDU liquid cooling plate 32 and the BDU bracket 31, which serves to limit the position of the insulation pad 35. In some embodiments, the insulation pad 35 is provided between the BDU liquid cooling plate 32 and the BDU bracket 31. The BDU bracket 31 has a limiting groove 314 recessed along the Z direction near the BDU liquid cooling plate 32, and the insulation pad 35 has a limiting protrusion 351 along the Z direction near the BDU bracket 31. The limiting protrusion 351 is inserted into the limiting groove 314 along the Z direction. The limiting protrusion 351 and the limiting groove 314 cooperate to position and limit the insulation pad 35, facilitating the installation of the insulation pad 35.

[0064] The insulation pad 35 can be made of foam. The side of the insulation pad 35 facing the BDU liquid cooling plate 32 can be flat. For the BDU bracket 31, the first locking member 14 connected to the first support frame 13 can be located in the limiting groove 314, and the second support frame 38 connected to the BDU bracket 31 can be located in the limiting groove 314 to make full use of the space. The limiting groove 314 on the BDU bracket 31 forms a protruding structure on the side near the first crossbeam 12, and the first support frame 13 is correspondingly arranged with the protruding structure.

[0065] The BDU assembly 30 also includes an insulating pad 37, which is disposed between the BDU bracket 31 and the battery module 20 to provide support and insulation, thereby improving the stability of the BDU bracket 31. Exemplarily, the insulating pad 37 abuts against a protruding structure of the BDU bracket 31. The insulating pad 37 can be a foam component.

[0066] The BDU assembly 30 also includes a thermally conductive adhesive pad 36, which is disposed between the BDU body 33 and the BDU liquid cooling plate 32. The thermally conductive adhesive pad 36 has a high thermal conductivity to improve the heat exchange efficiency between the BDU liquid cooling plate 32 and the BDU body 33, thereby improving the performance of the BDU body 33. The thermally conductive adhesive pad 36 can be formed by the solidification of thermally conductive adhesive, thus providing a fixing effect on the BDU body 33 and ensuring a stable connection between the BDU body 33 and the BDU liquid cooling plate 32.

[0067] The battery housing 10 also includes a cover, at least a portion of which protrudes away from the battery module 20 to form a casing, with the BDU body 33 disposed inside the casing. The casing provides accommodating space for the BDU body 33. A high-voltage connector 34 extends through the cover along the Z-direction to be inserted into the BDU bracket 31.

[0068] This embodiment also provides an electrical device, including the battery pack described above. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0069] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: The battery housing (10) has a receiving cavity (101); A battery module (20) is disposed in the accommodating cavity (101), and the battery module (20) includes a plurality of battery cells (21). The BDU assembly (30) includes a BDU bracket (31), a BDU liquid cooling plate (32), and a BDU body (33). The BDU bracket (31) is connected to the battery housing (10). At least a portion of the BDU bracket (31) extends to one side of the battery module (20) along the Z direction. The BDU body (33) is disposed along the Z direction on the side of the BDU bracket (31) away from the battery module (20). The BDU liquid cooling plate (32) is disposed between the BDU bracket (31) and the BDU body (33). The interior of the BDU liquid cooling plate (32) is used for the flow of coolant, and the BDU liquid cooling plate (32) abuts against the BDU body (33) to achieve heat exchange with the BDU body (33). The Z direction is the height direction of the battery housing (10).

2. The battery pack according to claim 1, characterized in that, The BDU bracket (31) includes a support body (311) and a support foot (312). At least a portion of the support body (311) is located on one side of the battery module (20) along the Z direction. The BDU liquid cooling plate (32) is disposed on the support body (311). The support foot (312) is bent and connected to the support body (311). The support body (311) and / or the support foot (312) are connected to the battery box (10).

3. The battery pack according to claim 2, characterized in that, The battery housing (10) includes a first side beam (11) and a first cross beam (12). The first side beam (11) is located on one side of the battery module (20) in the X direction. The first cross beam (12) is located inside the battery housing (10) to form an electrical compartment (1011) and a battery compartment (1012) for mounting the battery module (20). The support foot (312) is located inside the electrical compartment (1011) and connected to the first side beam (11). A portion of the support body (311) spans the electrical compartment (1011) and the battery compartment (1012) and is connected to the first cross beam (12). The X direction is the length direction of the battery housing (10).

4. The battery pack according to claim 3, characterized in that, The top of the first crossbeam (12) is fixedly provided with a plurality of first support frames (13), and the support body (311) is connected to the first support frame (13) through a first locking member (14); And / or, the end of the support foot (312) away from the support body (311) is bent and extended with a connecting part (3121), the connecting part (3121) being connected to the first side beam (11) by a second locking member (15).

5. The battery pack according to claim 3, characterized in that, Multiple support feet (312) are provided, and the multiple support feet (312) are spaced apart along the Y direction of the support body (311). A notch (313) is formed between adjacent support feet (312). A BMS component (40) is provided on the first crossbeam (12). The notch (313) is used to pass through the wire harness of the BMS component (40). The Y direction is the width direction of the battery box (10).

6. The battery pack according to claim 5, characterized in that, The support body (311) includes a first support portion (3111) and a second support portion (3112) arranged along the Y direction. At least a portion of the first support portion (3111) extends along the X direction to one side of the battery compartment (1012). The first support portion (3111) is used to support the BDU liquid cooling plate (32), and the second support portion (3112) is used to support the high-voltage plug (34).

7. The battery pack according to claim 1, characterized in that, A heat insulation pad (35) is provided between the BDU liquid cooling plate (32) and the BDU bracket (31). The BDU bracket (31) has a limiting groove (314) recessed on the side of the BDU liquid cooling plate (32) along the Z direction. The heat insulation pad (35) has a limiting protrusion (351) on the side of the BDU bracket (31) along the Z direction. The limiting protrusion (351) is inserted into the limiting groove (314) along the Z direction.

8. The battery pack according to claim 1, characterized in that, The battery housing (10) includes a cover, at least a portion of which protrudes in a direction away from the battery module (20) to form a housing, and the BDU body (33) is disposed inside the housing.

9. The battery pack according to any one of claims 1-8, characterized in that, The BDU assembly (30) also includes a thermally conductive pad (36), which is disposed between the BDU body (33) and the BDU liquid cooling plate (32); And / or, the BDU assembly (30) further includes an insulating pad (37) disposed between the BDU bracket (31) and the battery module (20).

10. An electrical device, characterized in that, Includes the battery pack as described in any one of claims 1-9.

Images