Battery device and vehicle

Abstract

This utility model discloses a battery device and a vehicle. The battery device, relating to the field of battery technology, includes: a battery pack comprising a housing with a mounting beam; a sleeve extending through the mounting beam along a first direction inclined to the housing; the sleeve comprising a first sleeve and a second sleeve, arranged and fixedly assembled along the first direction; at least a portion of the mounting beam being sandwiched between the first and second sleeves along the first direction to fix the sleeve to the mounting beam. By fixing the sleeve to the mounting beam with the first and second sleeves, and partially sandwiching the mounting beam between them, the welding connection between the sleeve and the mounting beam is eliminated, avoiding the brittle phase that easily occurs during welding of dissimilar materials, leading to a decrease in weld strength. This allows the sleeve to be adapted for assembly with mounting beams made of various materials, and also ensures the fixing strength of the sleeve on the mounting beam, improving the safety and stability of the battery pack.

Description

Technical Field

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

[0002] In related technologies, existing battery packs typically have sleeves welded to their casings. Fasteners use these sleeves to secure the casings to the vehicle body, allowing the battery pack casings to be mounted on the vehicle. However, welding the casings and sleeves together can easily lead to defects such as cracks and pores. Furthermore, welding the sleeves into the casings is difficult to manufacture and can result in poor welding quality, leading to unreliable connection strength between the sleeves and the casings. This, in turn, reduces the safety and stability of the battery pack. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a battery device that eliminates the welding connection between the sleeve and the housing, improves the fixing strength of the sleeve on the mounting beam of the housing, enhances the safety and stability of the battery pack, and also improves the applicability of the sleeve.

[0004] This utility model further proposes a vehicle having the above-mentioned battery device.

[0005] A battery device according to an embodiment of the present invention includes: a battery pack, the battery pack including a housing having a mounting beam; a sleeve, the sleeve being disposed through the mounting beam along a first direction inclined to the housing, the sleeve including a first sleeve and a second sleeve, the first sleeve and the second sleeve being arranged and fixedly assembled along the first direction, and at least a portion of the mounting beam being sandwiched between the first sleeve and the second sleeve along the first direction, so that the sleeve is fixed to the mounting beam.

[0006] According to the battery device of this utility model embodiment, by arranging and fixing a first sleeve and a second sleeve along a first direction, and with a portion of the mounting beam sandwiched between the first and second sleeves, the sleeve is fixed to the mounting beam. This eliminates the problem of reduced weld strength due to brittle phases when welding dissimilar materials, allowing the sleeve to be adapted for mounting beams made of various materials, thereby improving the sleeve's applicability. Furthermore, the first and second sleeves are rigidly connected through fixed assembly, ensuring the sleeve's fixation strength on the mounting beam. This makes the sleeve suitable for high loads or complex operating conditions, thereby improving the safety and stability of the battery pack.

[0007] According to some embodiments of the present invention, the first sleeve and the second sleeve are detachably connected.

[0008] According to some embodiments of the present invention, along a first direction, a first sleeve is configured to extend into the mounting beam from one side of the mounting beam, and a second sleeve is configured to extend into the mounting beam from the other side of the mounting beam, so that the first sleeve and the second sleeve are fixedly assembled.

[0009] According to some embodiments of the present invention, the first sleeve includes a first cylinder body, the second sleeve includes a second cylinder body, the first cylinder body extends into the mounting beam from one side of the mounting beam, the second cylinder body extends into the mounting beam from the other side of the mounting beam, and the first cylinder body extends into the second cylinder body so that the second cylinder body is sleeved on the first cylinder body, and the second cylinder body and the first cylinder body are threadedly connected.

[0010] According to some embodiments of the present invention, the first sleeve further includes a first limiting stop, which is disposed on the outer peripheral wall of the first sleeve and is located on the side of the mounting beam opposite to the second sleeve, and abuts against the mounting beam for limiting; and / or

[0011] The second sleeve also includes a second limiting stop, which is located on the outer peripheral wall of the second sleeve and is positioned on the side of the mounting beam away from the first sleeve and abuts against the mounting beam for limiting.

[0012] According to some embodiments of the present invention, the first direction is the height direction of the battery device.

[0013] According to some embodiments of this utility model, the housing is made of magnesium alloy.

[0014] According to some embodiments of the present invention, the battery device further includes: a fastener, which is configured to extend into the sleeve from one side and extend out of the sleeve from the other side along a first direction, and the fastener and the sleeve abut against and limit each other along the first direction, the fastener being used to connect with a fixing structure to fix the battery pack to the fixing structure.

[0015] According to some embodiments of this utility model, the potential difference between the mounting beam and the sleeve is V1, satisfying the relationship: 0V≤V1<0.5V; and / or

[0016] The potential difference between the fastener and the sleeve is V2, which satisfies the relationship: 0V≤V2<0.5V.

[0017] The vehicle according to an embodiment of the present invention includes the battery device described in the above embodiment.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of the box body according to an embodiment of the present utility model;

[0021] Figure 2 This is an exploded view of the box body, sleeve, and fasteners according to an embodiment of this utility model;

[0022] Figure 3 This is an assembly diagram of the box body, sleeve, and fasteners according to an embodiment of the present utility model.

[0023] Figure label:

[0024] Battery device 100;

[0025] Box body 10; Mounting beam 11;

[0026] Sleeve 20;

[0027] First sleeve 21; First cylinder 211; First limiting flange 212; External thread 213; Boss structure 214;

[0028] Second sleeve 22; Second cylinder 221; Second limiting flange 222; Internal thread 223;

[0029] Fastener 30. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] The following is for reference. Figures 1-3 This invention describes a battery device 100 and a vehicle according to an embodiment of the present invention.

[0032] A battery device 100 according to an embodiment of the present invention includes: a battery pack, the battery pack including a housing 10, the housing 10 having a mounting beam 11; a sleeve 20, the sleeve 20 being disposed through the mounting beam 11 along a first direction inclined to the housing 10, the sleeve 20 including a first sleeve 21 and a second sleeve 22, the first sleeve 21 and the second sleeve 22 being arranged and fixedly assembled along the first direction, and at least a portion of the mounting beam 11 being sandwiched between the first sleeve 21 and the second sleeve 22 along the first direction, so that the sleeve 20 is fixed to the mounting beam 11.

[0033] The box body 10 has a mounting beam 11, which can be located on the side of the box body 10. In some embodiments of this utility model, the box body 10 and the mounting beam 11 can be fixedly connected by welding, the box body 10 and the mounting beam 11 can be integrally formed, or the box body 10 and the mounting beam 11 can be fixedly connected by bolts. However, this utility model is not limited to this. The box body 10 and the mounting beam 11 can also be fixedly connected by other means, as long as the box body 10 has a mounting beam 11.

[0034] like Figure 3 As shown, the first direction is Figure 3 In the X direction, the sleeve 20 passes through the mounting beam 11 along a first direction inclined to the housing 10 (meaning the sleeve 20 passes through the mounting beam 11 along the first direction, and the housing 10 is inclined to the first direction). The sleeve 20 includes a first sleeve 21 and a second sleeve 22. The first sleeve 21 and the second sleeve 22 are arranged and fixedly assembled along the first direction. In some embodiments of this utility model, the first sleeve 21 and the second sleeve 22 can be fixedly assembled by threads, or the first sleeve 21 and the second sleeve 22 can be fixedly assembled by bolts. However, this utility model is not limited to this. The first sleeve 21 and the second sleeve 22 can also be fixedly assembled by other means, as long as the first sleeve 21 and the second sleeve 22 are arranged and fixedly assembled along the first direction.

[0035] Along the first direction, at least a portion of the mounting beam 11 is clamped between the first sleeve 21 and the second sleeve 22, so that the sleeve 20 is fixed to the mounting beam 11 and the displacement of the sleeve 20 on the mounting beam 11 is effectively limited, and the sleeve 20 is prevented from loosening or falling off due to vibration or impact. Furthermore, the sleeve 20 adopts a split design, which facilitates pre-installation or post-installation of the sleeve 20 on the mounting beam 11. When installing the sleeve 20, the first sleeve 21 can be fixed to the mounting beam 11 first, and then the second sleeve 22 can be installed, simplifying the assembly process. If the sleeve 20 needs to be removed, only the fixing assembly of the first sleeve 21 and the second sleeve 22 needs to be released to remove the sleeve 20 from the mounting beam 11 without damaging the structure of the mounting beam 11, facilitating the maintenance or replacement of the battery pack.

[0036] Furthermore, the first sleeve 21 and the second sleeve 22 are fixedly assembled to secure the sleeve 20 to the mounting beam 11, eliminating the need for welding between the sleeve 20 and the mounting beam 11. This avoids the problem of reduced weld strength due to brittle phases caused by welding dissimilar materials, allowing the sleeve 20 to be adapted for mounting beams 11 made of various materials, thus improving its applicability. Moreover, the fixed assembly of the first sleeve 21 and the second sleeve 22 forms a rigid connection, ensuring the sleeve 20's fixation strength on the mounting beam 11, making the sleeve 20 suitable for high-load or complex working conditions.

[0037] According to the battery device 100 of this utility model embodiment, by arranging and fixing a first sleeve 21 and a second sleeve 22 along a first direction, a portion of the mounting beam 11 is sandwiched between the first sleeve 21 and the second sleeve 22, so that the sleeve 20 is fixed to the mounting beam 11. This avoids the situation where welding dissimilar materials easily produces brittle phases, leading to a decrease in welding strength. Therefore, the sleeve 20 can be adapted to be assembled with mounting beams 11 made of various materials, thereby improving the applicability of the sleeve 20. Furthermore, the first sleeve 21 and the second sleeve 22 are fixedly assembled to form a rigid connection, ensuring the fixing strength of the sleeve 20 on the mounting beam 11, making the sleeve 20 suitable for high loads or complex working conditions.

[0038] According to some embodiments of the present invention, such as Figure 2 As shown, the first sleeve 21 and the second sleeve 22 are detachably connected. In some embodiments of this invention, the first sleeve 21 and the second sleeve 22 can be detachably connected by threads or by snap-fit. However, this invention is not limited to these methods; the first sleeve 21 and the second sleeve 22 can also be detachably connected in other ways, as long as they are detachably connected. This arrangement facilitates the pre-installation or post-installation of the sleeve 20 on the mounting beam 11. When installing the sleeve 20, the first sleeve 21 can be fixed to the mounting beam 11 first, and then the second sleeve 22 can be installed, simplifying the assembly process. Furthermore, if either the first sleeve 21 or the second sleeve 22 is damaged, it can be repaired or replaced individually without replacing the entire sleeve 20, thereby reducing maintenance costs and time. If it is necessary to disassemble the sleeve 20, simply disconnect the fixing assembly of the first sleeve 21 and the second sleeve 22 to remove the sleeve 20 from the mounting beam 11 without damaging the structure of the mounting beam 11, which facilitates the maintenance or replacement of the battery pack.

[0039] According to some embodiments of the present invention, such as Figure 2 and Figure 3 As shown, along the first direction, the first sleeve 21 is configured to extend into the mounting beam 11 from one side of the mounting beam 11, and the second sleeve 22 is configured to extend into the mounting beam 11 from the other side of the mounting beam 11, so that the first sleeve 21 and the second sleeve 22 are fixedly assembled.

[0040] The mounting beam 11 may have through holes corresponding to the first sleeve 21 and the second sleeve 22. The first sleeve 21 is configured to extend into the mounting beam 11 from one side, and the second sleeve 22 is configured to extend into the mounting beam 11 from the other side, so that the first sleeve 21 and the second sleeve 22 form an through-hole structure. The first sleeve 21 and the second sleeve 22 are fixedly assembled, so that the connection between the first sleeve 21 and the second sleeve 22 can share the load when under stress, and also provide axial tensile and compressive bearing capacity. It can also provide lateral constraint through the friction between the sleeve 20 and the mounting beam 11, and prevent relative sliding or rotation at the connection when under stress, which significantly improves the connection stability and shear resistance of the first sleeve 21 and the second sleeve 22.

[0041] According to some embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the first sleeve 21 includes a first cylinder 211, and the second sleeve 22 includes a second cylinder 221. The first cylinder 211 extends into the mounting beam 11 from one side, and the second cylinder 221 extends into the mounting beam 11 from the other side. The first cylinder 211 extends into the second cylinder 221 so that the second cylinder 221 is sleeved on the first cylinder 211. The second cylinder 221 and the first cylinder 211 are threadedly connected.

[0042] The diameter of the first cylinder 211 can be smaller than that of the second cylinder 221. The outer peripheral wall of the first cylinder 211 has an external thread 213, and the inner peripheral wall of the second cylinder 221 has an internal thread 223. The external thread 213 and the internal thread 223 are compatible. When the sleeve 20 is installed on the mounting beam 11, the first cylinder 211 extends into the mounting beam 11 from one side, and the second cylinder 221 extends into the mounting beam 11 from the other side. The first cylinder 211 extends into the second cylinder 221 so that the external thread 213 and the internal thread 223 are connected. The mechanical self-locking principle of the thread is used to limit the axial displacement of the first cylinder 211 and the second cylinder 221. The friction of the thread tooth side also provides lateral constraint to prevent relative rotation or sliding between the first cylinder 211 and the second cylinder 221, thereby improving the connection stability of the first cylinder 211 and the second cylinder 221.

[0043] Furthermore, it reduces the assembly efficiency and accuracy of the first sleeve 21 and the second sleeve 22. When assembling the first sleeve 21 and the second sleeve 22, the connection can be completed simply by screwing the first sleeve 211 into the second sleeve 221 from one side of the mounting beam 11, without the need for complex tools or auxiliary measures. The assembly efficiency is significantly improved. The threaded fit has a self-guiding function, and the first sleeve 211 can automatically adjust its position during the screwing into the second sleeve 221 to ensure precise alignment with the second sleeve 221 and reduce installation errors. The threaded fit has a large contact area, and the stress is evenly distributed along the thread flank, avoiding local stress concentration and preventing local embrittlement of the welded connection, thus extending the service life of the connection node.

[0044] In addition, the threaded connection is a detachable connection, which allows the sleeve 20 to be disassembled by rotating in the opposite direction, making it convenient for later inspection, maintenance or replacement without damaging the structure of the sleeve 20 and the mounting beam 11. This can greatly reduce the maintenance cost and time of the battery device 100. The sleeve 20 can be prefabricated as a standardized component and directly assembled on site, making it highly adaptable and suitable for mounting beams 11 of different sizes and types.

[0045] According to some embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the first sleeve 21 may further include a first limiting flange 212, which is disposed on the outer peripheral wall of the first cylinder 211. The first limiting flange 212 is located on the side of the mounting beam 11 opposite to the second sleeve 22 and abuts against the mounting beam 11 for limiting; and / or

[0046] The second sleeve 22 may also include a second limiting stop 222, which is provided on the outer peripheral wall of the second cylinder 221. The second limiting stop 222 is located on the side of the mounting beam 11 away from the first sleeve 21 and abuts against the mounting beam 11 for limiting.

[0047] In one embodiment of this utility model, the first sleeve 21 may further include a first limiting flange 212. The first limiting flange 212 is disposed on the outer peripheral wall of the first cylinder 211. The first limiting flange 212 is located on the side of the mounting beam 11 opposite to the second sleeve 22 and abuts against the mounting beam 11 for limiting movement. This restricts the first sleeve 21 from moving towards the second sleeve 22 along the first direction, reducing the risk of axial movement or disengagement of the first sleeve 21, ensuring a reliable connection between the first sleeve 21 and the second sleeve 22. Furthermore, the contact between the first limiting flange 212 and the mounting beam 11 can share some of the shear force, reducing stress concentration on the thread flanks of the external thread 213 and the internal thread 223. It also ensures the accurate axial position of the first sleeve 21, avoiding connection deviations caused by inconsistent screw-in depths.

[0048] Alternatively, in another embodiment of this utility model, the second sleeve 22 may further include a second limiting flange 222. The second limiting flange 222 is disposed on the outer peripheral wall of the second cylinder 221. The second limiting flange 222 is located on the side of the mounting beam 11 opposite to the first sleeve 21 and abuts against the mounting beam 11 for limiting movement. This restricts the second sleeve 22 from moving towards the first sleeve 21 along the first direction, reducing the risk of axial movement or disengagement of the second sleeve 22, ensuring a reliable connection between the first sleeve 21 and the second sleeve 22. Furthermore, the contact between the second limiting flange 222 and the mounting beam 11 can share some of the shear force, reducing stress concentration on the thread flanks of the external thread 213 and the internal thread 223. It also ensures the accurate axial position of the second sleeve 22, avoiding connection deviations caused by inconsistent screw-in depths.

[0049] Alternatively, as another embodiment of this utility model, this utility model will be described using this embodiment as an example. The first sleeve 21 may further include a first limiting stop 212, which is disposed on the outer peripheral wall of the first cylinder 211. The first limiting stop 212 is located on the side of the mounting beam 11 away from the second sleeve 22 and abuts against the mounting beam 11 for limiting. The second sleeve 22 may further include a second limiting stop 222, which is disposed on the outer peripheral wall of the second cylinder 221 and is located on the side of the mounting beam 11 away from the first sleeve 21 and abuts against the mounting beam 11 for limiting.

[0050] This configuration simultaneously restricts the axial movement of the first sleeve 21 and the second sleeve 22, reducing the risk of connection failure due to movement. Furthermore, the contact between the first limiting flange 212, the second limiting flange 222, and the mounting beam 11 can share some of the shear force. Since both the first limiting flange 212 and the second limiting flange 222 are annular, the contact area between them and the mounting beam 11 is increased, further reducing stress concentration on the thread flanks of the external thread 213 and the internal thread 223. It also ensures accurate axial positioning of the first sleeve 21 and the second sleeve 22, avoiding connection deviations caused by inconsistent screw-in depths. Furthermore, it can stably fix the sleeve 20 to the mounting beam 11, replacing the traditional method of welding the sleeve 20 to the mounting beam 11. This avoids the situation where welding dissimilar materials is prone to producing brittle phases, which leads to a decrease in welding strength. As a result, the sleeve 20 can be adapted to be assembled with mounting beams 11 made of various materials, thereby improving the applicability of the sleeve 20.

[0051] According to some embodiments of the present invention, such as Figures 1-3As shown, the first direction can be the height direction of the battery device 100. The sleeve 20 passes through the mounting beam 11 along the height direction of the battery device 100, providing positioning and guidance for the fasteners 30 in the height direction of the mounting beam 11. When assembling the fasteners 30, the sleeve 20 can act as a guide, guiding the components to move along the height direction of the mounting beam 11, reducing deviation and friction. Because the sleeve 20 provides precise positioning and guidance, assemblers can more easily assemble the fasteners 30 into place without complex adjustments and calibrations. This also helps reduce problems such as loosening and detachment caused by improper assembly, improving the overall assembly quality of the battery device 100.

[0052] According to some embodiments of the present invention, the battery device 100 may further include: a fastener 30, which is configured to extend into the sleeve 20 from one side and extend out of the sleeve 20 from the other side along a first direction, and the fastener 30 abuts against and limits the sleeve 20 along the first direction. The fastener 30 is used to connect with a fixing structure to fix the battery pack to the fixing structure.

[0053] The fastener 30 can be constructed as a bolt, pin, or other fastener 30. This utility model uses a galvanized steel bolt as an example for explanation. Along the first direction, the fastener 30 is configured to extend into the sleeve 20 from one side and extend out from the other side of the sleeve 20, making the installation process of the fastener 30 simpler and faster. Furthermore, the fastener 30 and the sleeve 20 abut and limit each other along the first direction, ensuring the stable position of the fastener 30 within the sleeve 20 and reducing the risk of loosening due to vibration or external forces. This is crucial for the safe fixing of the battery pack and can effectively prevent the battery pack from falling off or shifting during use due to connection failure. The fastener 30 is used to connect with the fixed structure to fix the battery pack to the fixed structure, forming a stable overall structure that can effectively resist external impacts and vibrations, protecting the battery pack from damage.

[0054] The fixing structure can be the vehicle body or other components. Further, as a specific embodiment of this utility model, the fixing structure is the vehicle body. After the sleeve 20 is assembled on the mounting beam 11, along the first direction, the fastener 30 is configured to extend from the second sleeve 22 and extend from the first sleeve 21. The extended part of the fastener 30 is fixedly assembled with the vehicle body to mount the battery pack box 10 on the vehicle body. Since the first sleeve 21 is threadedly connected to the second sleeve 22, and the diameter of the first sleeve 21 is smaller than the diameter of the second sleeve 22, the first sleeve 21 is threadedly connected to the second sleeve 22 after it extends into the second sleeve 22, thus defining a limiting surface. After the fastener 30 extends into the sleeve 20, the fastener 30 abuts against the limiting surface of the first sleeve 21, so that one end of the fastener 30 abuts against the sleeve 20 in the first direction and limits its position. The other end of the fastener 30 extending out of the sleeve 20 is fixedly assembled with the vehicle body, ensuring the stable position of the fastener 30 in the sleeve 20. This allows the battery pack housing 10 to be securely mounted on the vehicle body, effectively preventing the battery pack from falling off or shifting due to connection failure during use.

[0055] Furthermore, such as Figure 2 and Figure 3 As shown, a boss structure 214 can be formed at the first limiting stop 212 of the first sleeve 21. When the protruding part of the fastener 30 is fixedly assembled with the vehicle body, the upper wall of the boss structure 214 fits against the vehicle body along the first direction. The height of the boss structure 214 can be reasonably set according to the distance between the first limiting stop 212 and the vehicle body after the sleeve 20 is installed on the mounting beam 11. The setting of the boss structure 214 can avoid the sleeve 20 being too far from the vehicle body after being installed on the mounting beam 11, thus avoiding the need to set other connecting parts to fill the distance between the first limiting stop 212 and the vehicle body, reducing the number of parts and facilitating the lightweight design of the vehicle. Furthermore, the fitting design of the boss structure 214 with the vehicle body, and the fact that the boss structure 214 can be set as a ring, can increase the contact area between the boss structure 214 and the vehicle body, thereby achieving a sealing effect to a certain extent. This prevents moisture, dust and other impurities from entering between the sleeve 20, fastener 30 and mounting beam 11, and helps protect the surfaces of the sleeve 20, fastener 30 and mounting beam 11 from corrosion and wear. The boss structure 214 can also act as a buffer layer to absorb and disperse external impact forces, protecting the fastener 30 and the vehicle body from damage, thereby improving the safety and stability of the vehicle.

[0056] Furthermore, the sidewalls of the boss structure 214, the top and sidewalls of the first limiting edge 212, and the mounting beam 11 can all be coated with an anti-corrosion coating. The anti-corrosion coating covers the sidewalls of the boss structure 214, the top and sidewalls of the first limiting edge 212, and the mounting beam 11, which can isolate air and moisture, thereby reducing the risk of galvanic corrosion between the sleeve 20, fastener 30, and mounting beam 11 due to external humidity or moisture, so as to avoid reducing the structural strength of the sleeve 20, fastener 30, and mounting beam 11.

[0057] It should be noted that the anti-corrosion coating can be an electrophoretic layer, a passivation layer, an insulating powder coating, a polyurea coating, etc., and a reasonable selection can be made according to the actual situation.

[0058] According to some embodiments of the present invention, the potential difference between the mounting beam 11 and the sleeve 20 is V1, satisfying the relationship: 0≤V1<0.5V; and / or the potential difference between the fastener 30 and the sleeve 20 is V2, satisfying the relationship: 0≤V2<0.5V.

[0059] In this embodiment, the potential difference between the mounting beam 11 and the sleeve 20 is V1, satisfying the relationship: 0 ≤ V1 < 0.5V. Alternatively, the potential difference between the fastener 30 and the sleeve 20 is V2, satisfying the relationship: 0 ≤ V2 < 0.5V. Or, the potential difference between the mounting beam 11 and the sleeve 20 is V1, satisfying the relationship: 0 ≤ V1 < 0.5V, and the potential difference between the fastener 30 and the sleeve 20 is V2, satisfying the relationship: 0 ≤ V2 < 0.5V (this embodiment is used as an example for illustration).

[0060] The potential difference V1 between the mounting beam 11 and the sleeve 20 can be 0V or any value between 0V and 0.5V. In some embodiments of this utility model, the potential difference V1 between the mounting beam 11 and the sleeve 20 can be 0V, 0.1V, 0.2V, 0.3V, etc., but this utility model is not limited to this. The potential difference V1 between the mounting beam 11 and the sleeve 20 can also be other values ​​between 0V and 0.5V, as long as the potential difference V1 between the mounting beam 11 and the sleeve 20 satisfies the relationship: 0≤V1<0.5V. In the field of metal corrosion, metal combinations with a potential difference greater than or equal to 0.5V require mandatory electrical insulation design. When the potential difference between two metals is greater than or equal to 0.5V, a significant galvanic corrosion effect may occur at the metal material connection area. The metal with the lower potential acts as the anode and is accelerated to corrode, while the metal with the higher potential acts as the cathode and is protected. Therefore, by setting the potential difference V1 between the mounting beam 11 and the sleeve 20 between 0V and 0.5V, the galvanic corrosion current density is extremely low (usually less than 1μA / cm2), and the corrosion rate is negligible. This can avoid galvanic corrosion between the mounting beam 11 and the sleeve 20, prevent the reduction of structural strength due to galvanic corrosion, reduce the risk of collapse and fracture, and eliminate the need for an insulating coating or sacrificial anode, thus reducing construction complexity and maintenance costs.

[0061] The potential difference V2 between the fastener 30 and the sleeve 20 can be 0V or any value between 0V and 0.5V. In some embodiments of this utility model, the potential difference V2 between the fastener 30 and the sleeve 20 can be 0V, 0.1V, 0.2V, 0.3V, etc., but this utility model is not limited to this. The potential difference V1 between the fastener 30 and the sleeve 20 can also be other values ​​between 0V and 0.5V, as long as the potential difference V2 between the fastener 30 and the sleeve 20 satisfies the relationship: 0≤V1<0.5V. In the field of metal corrosion, metal combinations with a potential difference greater than or equal to 0.5V require mandatory electrical insulation design. When the potential difference between two metals is greater than or equal to 0.5V, a significant galvanic corrosion effect will occur at the metal material connection area. The metal with the lower potential acts as the anode and is accelerated to corrode, while the metal with the higher potential acts as the cathode and is protected. Therefore, by setting the potential difference V2 between fastener 30 and sleeve 20 between 0V and 0.5V, the galvanic corrosion current density is extremely low (usually less than 1μA / cm2), and the corrosion rate is negligible. This can avoid galvanic corrosion between fastener 30 and sleeve 20, prevent the reduction of structural strength caused by galvanic corrosion, reduce the risk of collapse and breakage, and eliminate the need for insulating coatings or sacrificial anodes, thus reducing construction complexity and maintenance costs.

[0062] Therefore, the potential difference V1 between the mounting beam 11 and the sleeve 20 is set between 0V and 0.5V, and the potential difference V2 between the fastener 30 and the sleeve 20 is set between 0V and 0.5V. This creates a potential gradient among the mounting beam 11, sleeve 20, and fastener 30, preventing both direct contact between the mounting beam 11 and the fastener 30 and potential corrosion caused by indirect potential connections (potential connections caused by humid environments and rainwater). This blocks the electrochemical corrosion path between the dissimilar metals of the mounting beam 11, sleeve 20, and fastener 30, thereby improving the durability and reliability of the battery pack under complex operating conditions. It should be noted that the specific values ​​of the potentials of the mounting beam 11, sleeve 20, and fastener 30 are not limited, as long as the potential difference between the mounting beam 11 and the sleeve 20 is less than 0.5V, and the potential difference between the fastener 30 and the sleeve 20 is less than 0.5V.

[0063] In some embodiments of this utility model, the housing 10 can be made of magnesium alloy.

[0064] The battery pack housing 10 can be made of magnesium alloy, the sleeve 20 can be made of aluminum alloy, and the fastener 30 can be made of galvanized steel bolts. The potential of magnesium alloy is -1.6V to -1.8V, the potential of aluminum alloy is -1.5V to -1.7V, and the potential difference between magnesium alloy and aluminum alloy is less than 0.5V. The potential of galvanized steel bolts is -1.03V, and the potential difference between aluminum alloy and galvanized steel bolts is less than 0.5V. This can form a potential gradient among the mounting beam 11, sleeve 20, and fastener 30, blocking the electrochemical corrosion path of dissimilar metals among the mounting beam 11, sleeve 20, and fastener 30, thereby improving the durability and reliability of the battery pack under complex working conditions.

[0065] The vehicle according to this utility model embodiment includes the battery device 100 of the above embodiment. By arranging and fixing a first sleeve 21 and a second sleeve 22 along a first direction, a portion of the mounting beam 11 is sandwiched between the first sleeve 21 and the second sleeve 22, so that the sleeve 20 is fixed to the mounting beam 11. This avoids the situation where welding dissimilar materials easily produces brittle phases, leading to a decrease in welding strength. This allows the sleeve 20 to be adapted for mounting beams 11 made of various materials, thereby improving the applicability of the sleeve 20. Furthermore, the first sleeve 21 and the second sleeve 22 are fixedly assembled to form a rigid connection, which ensures the fixing strength of the sleeve 20 on the mounting beam 11, making the sleeve 20 suitable for high loads or complex working conditions, thereby improving the safety and stability of the battery pack.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: A battery pack, the battery pack including a housing having mounting beams; A sleeve is provided through the mounting beam along a first direction inclined to the housing. The sleeve includes a first sleeve and a second sleeve, which are arranged and fixedly assembled along the first direction. Along the first direction, at least a portion of the mounting beam is sandwiched between the first sleeve and the second sleeve to fix the sleeve to the mounting beam.

2. The battery device according to claim 1, characterized in that, The first sleeve and the second sleeve are detachably connected.

3. The battery device according to claim 1, characterized in that, Along the first direction, the first sleeve is configured to extend into the mounting beam from one side of the mounting beam, and the second sleeve is configured to extend into the mounting beam from the other side of the mounting beam, so that the first sleeve and the second sleeve are fixedly assembled.

4. The battery device according to claim 3, characterized in that, The first sleeve includes a first cylindrical body, and the second sleeve includes a second cylindrical body. The first cylindrical body extends into the mounting beam from one side, and the second cylindrical body extends into the mounting beam from the other side. The first cylindrical body extends into the second cylindrical body so that the second cylindrical body is sleeved on the first cylindrical body, and the second cylindrical body and the first cylindrical body are threadedly connected.

5. The battery device according to claim 4, characterized in that, The first sleeve further includes a first limiting stop, which is disposed on the outer peripheral wall of the first sleeve. The first limiting stop is located on the side of the mounting beam opposite to the second sleeve and abuts against the mounting beam for limiting; and / or The second sleeve also includes a second limiting stop, which is disposed on the outer peripheral wall of the second cylinder. The second limiting stop is located on the side of the mounting beam away from the first sleeve and abuts against the mounting beam for limiting.

6. The battery device according to claim 1, characterized in that, The first direction is the height direction of the battery device.

7. The battery device according to claim 1, characterized in that, The enclosure is made of magnesium alloy.

8. The battery device according to any one of claims 1-7, characterized in that, Also includes: A fastener, along the first direction, is configured to extend into the sleeve from one side and extend out of the sleeve from the other side, and the fastener abuts and limits the sleeve along the first direction, the fastener being used to connect with a fixing structure to secure the battery pack to the fixing structure.

9. The battery device according to claim 8, characterized in that, The potential difference between the mounting beam and the sleeve is V1, satisfying the relationship: 0V≤V1<0.5V; and / or The potential difference between the fastener and the sleeve is V2, which satisfies the relationship: 0V≤V2<0.5V.

10. A vehicle, characterized in that, Includes the battery device according to any one of claims 1-9.

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