A battery pack

Abstract

This utility model discloses a battery pack, belonging to the field of battery technology. The battery pack includes a battery box, a battery pack, and a flexible protective plate. A structural beam is provided inside the battery box, and a suspension point structure is provided on the structural beam. The battery pack is disposed inside the battery box and located on at least one side of the structural beam. The flexible protective plate is sandwiched between the structural beam and the battery pack along the X direction. The flexible protective plate is provided with a receiving groove for accommodating wire harnesses. The flexible protective plate, under its own elasticity, presses the wire harness against the suspension point structure. By setting up the flexible protective plate to isolate the battery pack and the wire harness, friction between the wire harness and the battery pack is avoided. The elasticity of the flexible protective plate itself presses the wire harness against the suspension point structure, and the receiving groove limits the wire harness, preventing the wire harness from shifting under vibration. The flexible protective plate has a simple structure, can flexibly avoid the structural beam, adapts to the small installation space inside the battery box, simplifies the wire harness arrangement and fixing process, facilitates installation, and is low in cost.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack. Background Technology

[0002] The wiring harnesses within the battery pack run crisscross, and their proximity to the battery housing and battery pack makes them vulnerable to damage from vibrations if not properly secured. This could lead to wear and tear on the harness's surface, potentially causing leakage and electric shock. Wiring routing prioritizes the remaining space and gaps within the battery pack, resulting in very limited space. While related technologies use brackets and clips to secure the harnesses, these methods are space-consuming and increase installation difficulty. Furthermore, excessively long wiring harnesses within the confined space increase the risk of interference and wear, severely impacting battery stability and safety. Utility Model Content

[0003] The purpose of this invention is to provide a battery pack to solve the technical problem of wear caused by friction between the wiring harness and other structures in the prior art.

[0004] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0005] A battery pack, comprising:

[0006] A battery box, wherein a structural beam is provided inside the battery box, and a suspension point structure is provided on the structural beam;

[0007] A battery pack is disposed within the battery housing and located on at least one side of the structural beam;

[0008] A flexible protective plate is sandwiched between the structural beam and the battery pack along the X direction. The flexible protective plate is provided with a receiving groove that can accommodate the wire harness. Under its own elasticity, the flexible protective plate presses the wire harness against the suspension point structure.

[0009] Preferably, the flexible protective plate extends in a wavy shape along the Z direction, and the flexible protective plate includes a plurality of protrusions, with a recess formed between two adjacent protrusions, and at least a portion of the recess serves as the receiving groove.

[0010] Preferably, the flexible protective plate includes a limiting section and a protective section arranged along the Z direction. The limiting section is located between the structural beam and the battery pack, and the protective section is located between the suspension point structure and the battery pack. The protective section is provided with the receiving groove, and at least two of the protrusions in the limiting section abut against the structural beam.

[0011] Preferably, the distance H1 between adjacent protrusions and recesses in the limiting segment along the Z direction is greater than the distance H2 between adjacent protrusions and recesses in the protective segment along the Z direction; and / or, the distance L1 between adjacent protrusions and recesses in the limiting segment along the X direction is greater than the distance L2 between adjacent protrusions and recesses in the protective segment along the X direction.

[0012] Preferably, the distance between the structural beam and the battery pack along the X direction is a, and the width of the flexible protective plate along the X direction is b, where b is greater than a.

[0013] Preferably, the difference between b and a is greater than 0.5 mm and less than 5 mm.

[0014] Preferably, the radius of the receiving groove is r, and the radius of the wire harness is R, where R is greater than r.

[0015] Preferably, the flexible protective plate has a curved portion at one end near the bottom of the battery box, the curved portion being bent toward the structural beam and spaced apart from the structural beam.

[0016] Preferably, the flexible protective plate is a one-piece molded structure, and / or the wall thickness of the flexible protective plate is 0.1mm-2mm.

[0017] Preferably, a potting area is formed between the structural beam and the battery pack, the potting area is used to accommodate the adhesive, and part of the flexible protective plate is fixed in the adhesive.

[0018] The beneficial effects of this utility model are:

[0019] The battery pack proposed in this utility model includes a structural beam inside the battery box, with a lifting point structure on the structural beam. The battery pack is housed inside the battery box and located on at least one side of the structural beam. A flexible protective plate is sandwiched between the structural beam and the battery pack along the X-direction. The flexible protective plate has a receiving groove capable of accommodating a wire harness, and its own elasticity holds the wire harness against the lifting point structure. By using the flexible protective plate to isolate the battery pack and the wire harness, friction between the wire harness and the battery pack is avoided. The elasticity of the flexible protective plate holds the wire harness against the lifting point structure, and the receiving groove limits the wire harness, preventing displacement under vibration. The flexible protective plate has a simple structure, can flexibly avoid the structural beam, adapts to the small installation space inside the battery box, simplifies the wire harness arrangement and fixing process, facilitates installation, and is low in cost. Attached Figure Description

[0020] Figure 1 This is a partial structural schematic diagram of the battery pack provided in an embodiment of the present utility model;

[0021] Figure 2 This is a partial structural side view of the battery pack provided in an embodiment of the present invention;

[0022] Figure 3 yes Figure 2 Partial structural diagram;

[0023] Figure 4 This is a structural schematic diagram of the battery pack, structural beam, suspension point structure, and flexible protective plate provided in this embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the flexible protective plate provided in this embodiment of the utility model;

[0025] Figure 6 This is a side view of the flexible protective plate provided in an embodiment of this utility model.

[0026] In the picture:

[0027] 10. Structural beams;

[0028] 20. Suspension point structure;

[0029] 30. Battery pack;

[0030] 40. Flexible protective plate; 41. Receiving groove; 42. Protrusion; 43. Recess; 44. Limiting section; 45. Protective section; 46. Bending section;

[0031] 50. Wiring harness. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown 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 this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, 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 utility model based on the specific circumstances.

[0034] 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.

[0035] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] See Figures 1 to 6 This embodiment provides a battery pack, including a battery box and a battery pack 30. A structural beam 10 is provided inside the battery box, and a suspension point structure 20 is provided on the structural beam 10. The battery pack 30 is disposed inside the battery box and located on at least one side of the structural beam 10.

[0037] The structural beam 10 can be a horizontal beam extending in the X direction, a vertical beam extending in the Y direction, or both. For example, the battery box contains horizontal and vertical beams arranged in a cross shape to divide the internal cavity of the battery box into four sub-cavities. Each sub-cavity can house a battery pack 30. Therefore, the battery pack 30 can be located on one side of the structural beam 10 or on both sides of the structural beam 10.

[0038] The structural beam 10 is equipped with lifting point structures 20, mainly used for lifting and securing the battery pack during assembly, transportation, installation, or maintenance. For example, the battery pack is used in a vehicle, and the lifting point structures 20 are connected to the vehicle body. The number of lifting point structures 20 on each structural beam 10 can be set according to actual needs. The lifting point structures 20 are generally arranged in pairs or symmetrically at four points to ensure balanced force during lifting and prevent deformation of the battery pack. The lifting point structures 20 can be bolted or welded to the structural beam 10.

[0039] Wiring harness 50 can be a high-voltage harness, a low-voltage harness, or any other type of harness. Since the battery pack 30 is located on the side of the structural beam 10, it is relatively close to the suspension point structure 20. The wiring harness needs to pass through the location of the suspension point structure 20, making it easy for the harness to come into contact with the battery pack 30. During use, such as vibrations or impacts from vehicle operation, or prolonged use, the wiring harness may rub against the battery pack 30, leading to damage or even leakage.

[0040] The battery pack provided in this embodiment also includes a flexible protective plate 40. The flexible protective plate 40 is sandwiched between the structural beam 10 and the battery pack 30 along the X direction, physically isolating the wire harness 50 and the battery pack 30. The flexible protective plate 40 is provided with a receiving groove 41 that can accommodate the wire harness 50 and is away from the battery pack 30. Under its own elasticity, the flexible protective plate 40 presses the wire harness 50 against the suspension point structure 20, ensuring that the wire harness 50 will not move or contact the battery pack 30.

[0041] A flexible protective plate 40 isolates the battery pack 30 from the wiring harness 50, preventing friction between them. The elasticity of the flexible protective plate 40 holds the wiring harness 50 firmly against the suspension point structure 20, forming a reliable fixation and preventing loosening, displacement, or swinging of the wiring harness 50 due to vibration during vehicle operation, ensuring reliable fixation. The receiving groove 41 limits the wiring harness 50, preventing direct friction and impact between the wiring harness 50 and the structural beam 10, suspension point structure 20, or other rigid components under vibration. The flexible protective plate 40 provides a certain degree of cushioning, acting as a soft isolation between the structural beam 10 and the battery pack 30, preventing the battery pack 30 from directly pressing against the wiring harness 50 due to vibration or assembly tolerances. The flexible protective plate 40 has a simple structure, flexibly avoiding the structural beam 10 to adapt to the limited installation space inside the battery box, facilitating installation and reducing cost. Furthermore, it achieves lightweighting of the battery box while ensuring strength.

[0042] The flexible protective panel 40 is elastic and can be made of existing PC material using vacuum forming, or of existing PC+ABS, PA, PPS and other materials using injection molding, extrusion or other processes.

[0043] The flexible protective plate 40 extends in a wavy shape along the Z direction. The flexible protective plate 40 includes multiple protrusions 42, and a recess 43 is formed between two adjacent protrusions 42. At least part of the recess 43 serves as a receiving groove 41. By setting the flexible protective plate 40 to extend in a wavy shape, it is easy for the flexible protective plate 40 to be inserted between the battery pack 30 and the structural beam 10 and undergo elastic deformation. The recess 43 is used as a receiving groove 41 to limit the wire harness 50. The receiving groove 41 is integrated into the flexible protective plate 40, eliminating the need for additional installation of wire clips, cable ties, or tape to fix the wire harness. During assembly, simply place the wire harness 50 into the receiving groove 41 of the flexible protective plate 40, and then install the flexible protective plate 40 in place. The elasticity of the flexible protective plate 40 will automatically press the wire harness 50 into place. The operation is simple and quick, which simplifies both the production process and the structure.

[0044] Typically, the wire harness 50 has a circular cross-sectional shape. The wire harness 50 is inserted into the receiving groove 41, and the flexible protective plate 40 uses its own elasticity to abut the wire harness 50 against the suspension point structure 20. Therefore, at least a portion of the wire harness 50 is located outside the receiving groove 41 to facilitate contact with the suspension point structure 20. For example, the radius of the receiving groove 41 is r, and the radius of the wire harness 50 is R, where R is greater than r. When the wire harness 50 contacts the receiving groove 41, the larger radius wire harness 50 will first contact the two sides of the receiving groove 41, thereby causing the wire harness 50 to shift towards the bottom of the receiving groove 41. This both fixes the position of the wire harness 50 and causes the flexible protective plate 40 to shift towards the battery pack 30, achieving elastic deformation of the flexible protective plate 40 so that the wire harness 50 is subjected to a reverse force and abutted against the suspension point structure 20. In other embodiments, the receiving groove 41 can be arc-shaped but is not limited to a circular arc, as long as it can effectively hold the wire harness 50 in place.

[0045] In this context, the Z-direction represents the height direction of the battery pack 30. The top of the flexible protective plate 40 may be lower than the top of the battery pack 30 to avoid interference between the flexible protective plate 40 and the top cover of the battery housing. In some embodiments, the top of the flexible protective plate 40 is flush with the top of the battery pack 30. In some embodiments, the top of the flexible protective plate 40 is higher than the top of the battery pack 30, but the difference in height is no more than 20mm, to prevent interference.

[0046] In this embodiment, the X direction is the length direction of the battery pack 30. Since the flexible protective plate 40 is sandwiched between the structural beam 10 and the battery pack 30 along the X direction and is fixed by its own elasticity, the width of the flexible protective plate 40 along the X direction is greater than the distance between the structural beam 10 and the battery pack 30 along the X direction. This allows the flexible protective plate 40 to have an interference fit when sandwiched between the structural beam 10 and the battery pack 30, so as to undergo elastic deformation and ensure that the flexible protective plate 40 is fixed and stable. Figure 3 In the figure, 'a' represents the distance between the structural beam 10 and the battery pack 30 along the X direction. Figure 6 In the figure, b represents the width of the flexible protective plate 40 along the X direction. b is greater than a, so that the flexible protective plate 40 can be elastically deformed and interference-fitted between the structural beam 10 and the battery pack 30. In the narrow space between the structural beam 10 and the battery pack 30, the flexible protective plate 40 optimizes space utilization, while isolating the battery pack 30 from the structural beam 10, protecting the wiring harness 50, and fixing the wiring harness 50, thus avoiding the need for additional space occupied by separately installing wiring harness fasteners.

[0047] In some embodiments, the difference between b and a is greater than or equal to 0.5 mm and less than or equal to 5 mm. For example, the difference between b and a is equal to 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, or 5 mm.

[0048] In this embodiment, the Y direction refers to the width direction of the battery pack 30. The length of the flexible protective plate 40 along the Y direction is between 5-10 cm. The function of the flexible protective plate 40 is simply to separate the battery pack 30 from the wire harness 50 at the closest point. The length of the flexible protective plate 40 along the Y direction can be less than the width of the battery pack 30 along the Y direction. However, the closest point between the battery pack 30 and the wire harness 50 is usually located in the middle of the battery pack 30. To facilitate the installation of the flexible protective plate 40, it can be made relatively long. The installation accuracy does not need to be too high; it only needs to be inserted between the battery pack 30 and the wire harness 50. The length of the flexible protective plate 40 along the Y direction is between 5-10 cm, which greatly enhances operability and improves production efficiency.

[0049] The flexible protective plate 40 includes a limiting section 44 and a protective section 45 arranged along the Z direction. The limiting section 44 is located between the structural beam 10 and the battery pack 30, and the protective section 45 is located between the suspension point structure 20 and the battery pack 30. The protective section 45 is provided with a receiving groove 41. At least two protrusions 42 in the limiting section 44 abut against the structural beam 10, so that the flexible protective plate 40 is pressed against the structural beam 10, thereby achieving elastic deformation and fixation of the flexible protective plate 40. The protective section 45, located between the suspension point structure 20 and the battery pack 30, is provided with a receiving groove 41, which can fix the wire harness 50 to prevent displacement of the wire harness 50 due to shaking or vibration.

[0050] It is understood that the protrusion 42 that abuts against the structural beam 10 is a recess 43 relative to the battery pack 30. Therefore, the recess 43 between the two protrusions 42 that abut against the structural beam 10 is a protrusion 42 relative to the battery pack 30 and abuts against the battery pack 30. In some embodiments, at least two protrusions 42 in the limiting segment 44 abut against the battery pack 30 so that the flexible protective plate 40 is pressed tightly against the battery pack 30.

[0051] The flexible protective plate 40 includes multiple protrusions 42 and multiple recesses 43. The protrusions 42 can be uniformly or non-uniformly arranged along the Z direction. For example, the distance H1 between adjacent protrusions 42 and recesses 43 in the limiting section 44 along the Z direction is greater than the distance H2 between adjacent protrusions 42 and recesses 43 in the protective section 45 along the Z direction. The larger distance between adjacent protrusions 42 and recesses 43 in the limiting section 44 along the Z direction facilitates processing and production, and is beneficial for installation between the battery pack 30 and the structural beam 10. It also facilitates elastic deformation of the limiting section 44 along the X direction. Under the same compression, H1 being greater than H2 will form a wider contact band between the flexible protective plate 40 and the battery pack 30. The increased contact area significantly reduces the pressure applied per unit area to the battery pack 30, effectively preventing the flexible protective plate from causing indentations, wear, or localized stress concentration on the battery pack 30 shell under vibration and compression, thereby maximizing the safety and lifespan of the battery pack 30. The distance between adjacent protrusions 42 and recesses 43 in the Z direction of the protective section 45 is small, which makes it easier for the protective section 45 to cooperate with the wire harness 50 to achieve a more stable wrapping, so as to fix the wire harness 50 and provide a more reliable anti-vibration and anti-displacement fixing effect. Figure 6 H1 and H2 are shown in the figure. In some embodiments, H1 is approximately 1.5 to 2.5 times the size of H2.

[0052] For example, the distance L1 between adjacent protrusions 42 and recesses 43 in the limiting section 44 along the X direction is greater than the distance L2 between adjacent protrusions 42 and recesses 43 in the protective section 45 along the X direction. The larger distance between adjacent protrusions 42 and recesses 43 in the limiting section 44 ensures that the flexible protective plate 40 can be inserted into the space between the battery pack 30 and the structural beam 10. The smaller distance between adjacent protrusions 42 and recesses 43 in the protective section 45 provides space for the wiring harness 50 and provides sufficient elasticity to abut the wiring harness 50. The greater L1 than L2 achieves the differentiated performance of the "soft protection" of the limiting section 44 and the "hard fixation" of the protective section 45, efficiently and reliably solving the two key problems of protection and fixation in a confined space. Figure 6 L1 and L2 are shown in the figure. In some embodiments, L1 is approximately 1.2 to 1.5 times the size of L2.

[0053] The flexible protective plate 40 has a width of b along the X direction, which is greater than the distance a along the X direction between the structural beam 10 and the battery pack 30. This is to allow the flexible protective plate 40 to be inserted into the space between the battery pack 30 and the structural beam 10 with an interference fit. For example, the limiting segment 44 has a width of b along the X direction, and the distance L1 along the X direction between adjacent protrusions 42 and recesses 43 in the limiting segment 44 is less than or equal to b. Preferably, L1 is equal to b, which facilitates manufacturing and ensures that each protrusion 42 of the limiting segment 44 can abut against the structural beam 10 or the battery pack 30.

[0054] A curved portion 46 is formed at one end of the flexible protective plate 40 near the bottom surface of the battery box. The curved portion 46 bends toward the structural beam 10 and is spaced apart from the structural beam 10. The curved portion 46 facing the structural beam 10 prevents the bottom end of the flexible protective plate 40 from rubbing against the battery pack 30 during installation. The spaced-apart arrangement of the curved portion 46 and the structural beam 10 avoids friction interference between the curved portion 46 and the structural beam 10 during the installation of the flexible protective plate 40.

[0055] In some embodiments, the flexible protective plate 40 is a one-piece molded structure, ensuring that the material properties and mechanical behavior of the entire flexible protective plate 40 are structurally continuous and uniform; and the geometry of the limiting section 44 and the protective section 45 can be precisely controlled to ensure the fit with the structural beam 10, the suspension point structure 20 and the battery pack 30, providing more uniform and reliable physical isolation; at the same time, it facilitates processing and production, simplifies the production process, and improves production efficiency. In some embodiments, the flexible protective plate 40 is a split structure, with the limiting section 44 and the protective section 45 interlocking, facilitating the replacement of the protective section 45 to allow for the replacement of different sized receiving slots 41 for wire harnesses 50 of different diameters.

[0056] In some embodiments, the flexible protective plate 40 has a wall thickness of 0.1mm-2mm, maintaining greater elasticity, occupying less space, and reducing the overall weight of the battery box. For example, the wall thickness of the flexible protective plate 40 is 0.1mm, 0.2mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 1.8mm, or 2mm.

[0057] The wall thickness of the flexible protective plate 40 can be uniform or non-uniform. For example, the wall thickness of the limiting segment 44 is greater than that of the protective segment 45, so that the limiting segment 44 is stronger and more stable in its fixation, and the protective segment 45 has greater elasticity in its contact with the wire harness 50. For example, the wall thickness of the flexible protective plate 40 gradually decreases along the direction from the limiting segment 44 to the protective segment 45, so that the limiting segment 44 is stronger and more stable in its fixation, and the protective segment 45 has greater elasticity in its contact with the wire harness 50.

[0058] The flexible protective plate 40 utilizes its own elastic interference fit between the battery pack 30 and the structural beam 10. Due to its elastic deformation, the flexible protective plate 40 can fix itself. To further secure the flexible protective plate 40, it can be fixed by potting adhesive. For example, a potting area is formed between the structural beam 10 and the battery pack 30 to accommodate the adhesive, and part of the flexible protective plate 40 is fixed within the adhesive. The adhesive, in liquid form, is poured between the structural beam 10 and the battery pack 30. The well-flowing adhesive submerges a portion of the flexible protective plate 40. After the adhesive solidifies, it fixes the flexible protective plate 40 to prevent displacement. The height of the adhesive can be set according to actual needs; for example, the height of the adhesive is approximately half the height of the structural beam 10.

[0059] This embodiment does not specifically limit the structure of the battery box. Exemplarily, the battery box includes a bottom plate and side plates, which form a cavity. The structural beam 10 and the battery pack 30 are both disposed within the cavity. A flexible protective plate 40 is inserted between the structural beam 10 and the battery pack 30. The bottom end of the flexible protective plate 40 may contact or be spaced apart from the bottom plate of the battery box. In some embodiments, a water-cooling plate is provided on the bottom plate to dissipate heat from the battery pack 30. Adhesive is poured between the structural beam 10 and the battery pack 30 to fix the structural beam 10, battery pack 30, flexible protective plate 40, and water-cooling plate.

[0060] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: A battery box, wherein a structural beam (10) is provided inside the battery box, and a suspension point structure (20) is provided on the structural beam (10); A battery pack (30) is disposed within the battery housing and located on at least one side of the structural beam (10); A flexible protective plate (40) is sandwiched between the structural beam (10) and the battery pack (30) along the X direction. The flexible protective plate (40) is provided with a receiving groove (41) that can accommodate the wire harness (50). The flexible protective plate (40) presses the wire harness (50) against the suspension point structure (20) under its own elasticity.

2. The battery pack according to claim 1, characterized in that, The flexible protective plate (40) extends in a wave-like manner along the Z direction. The flexible protective plate (40) includes a plurality of protrusions (42), and a recess (43) is formed between two adjacent protrusions (42). At least part of the recess (43) serves as the receiving groove (41).

3. The battery pack according to claim 2, characterized in that, The flexible protective plate (40) includes a limiting section (44) and a protective section (45) arranged along the Z direction. The limiting section (44) is located between the structural beam (10) and the battery pack (30). The protective section (45) is located between the suspension point structure (20) and the battery pack (30). The protective section (45) is provided with the receiving groove (41). At least two of the protrusions (42) in the limiting section (44) abut against the structural beam (10).

4. The battery pack according to claim 3, characterized in that, The distance H1 between adjacent protrusions (42) and recesses (43) in the limiting segment (44) along the Z direction is greater than the distance H2 between adjacent protrusions (42) and recesses (43) in the protective segment (45) along the Z direction. And / or, the distance L1 between adjacent protrusions (42) and recesses (43) in the limiting segment (44) along the X direction is greater than the distance L2 between adjacent protrusions (42) and recesses (43) in the protective segment (45) along the X direction.

5. The battery pack according to claim 1, characterized in that, The distance between the structural beam (10) and the battery pack (30) along the X direction is a, and the width of the flexible protective plate (40) along the X direction is b, where b is greater than a.

6. The battery pack according to claim 5, characterized in that, The difference between b and a is greater than 0.5 mm and less than 5 mm.

7. The battery pack according to claim 1, characterized in that, The radius of the receiving groove (41) is r, and the radius of the wire harness (50) is R, where R is greater than r.

8. The battery pack according to claim 1, characterized in that, The flexible protective plate (40) has a bent portion (46) at one end near the bottom of the battery box. The bent portion (46) bends toward the structural beam (10) and is spaced apart from the structural beam (10).

9. The battery pack according to claim 1, characterized in that, The flexible protective plate (40) is an integrally formed structure, and / or the wall thickness of the flexible protective plate (40) is 0.1mm-2mm.

10. The battery pack according to any one of claims 1-9, characterized in that, A potting area is formed between the structural beam (10) and the battery pack (30), the potting area is used to contain the adhesive, and part of the flexible protective plate (40) is fixed in the adhesive.

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