Electric vehicle

Abstract

The utility model discloses an electric vehicle which comprises a longitudinal beam, the longitudinal beam comprises a body section and an installation section which are connected, and a battery pack is installed on the installation section in a hanging mode. The installation section is bent upwards relative to the body section, or the lower surface of the installation section is provided with a containing groove. The vehicle beam structure can be prevented from limiting the height of the upper surface of the battery pack installed below the vehicle beam, and therefore the space between the lower surface of the vehicle beam and the upper surface of the vehicle beam is fully utilized.

Description

[0001] This application claims priority to Chinese patent application CN2022115318647 filed on December 1, 2022, Chinese patent application CN202211737316X filed on December 30, 2022, and Chinese patent application CN202223612099X filed on December 30, 2022. This application cites the full text of the above Chinese patent application. Technical Field

[0002] The utility model relates to an electric vehicle. Background Art

[0003] The battery packs on electric vehicles are all installed above the body beam and in the space between the trailer and the head of the vehicle. The charging time of the battery pack is too long. Currently, no matter which type of battery pack is used, fast charging will greatly reduce the capacity and service life of the battery pack. Even the so-called fast charging takes nearly half an hour, and the charging cost will also increase greatly during peak hours of electricity consumption, affecting the efficiency of the use of electric heavy trucks.

[0004] Based on the above reasons, the battery swap model was born. Compared with charging, firstly, battery swap can save a lot of time. Secondly, battery swap can avoid charging during peak hours of electricity consumption. Thirdly, battery swap takes up less parking space.

[0005] At present, in the relevant technical solutions, the battery pack is installed under or on the side of the beam of the electric vehicle; these two installation methods are determined according to the shape and size of the beam itself and the shape and size of the battery pack. However, the common problem is that when the battery pack is installed under the beam, the installation height of the battery pack must be lower than the beam, that is, the beam structure limits the height of the upper surface of the battery pack installed under the beam; thus, the space between the lower surface of the beam and the upper surface of the beam cannot be fully utilized. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the problem that when the battery pack is installed at the lower part of the vehicle beam, the installation height of the battery pack must be lower than the vehicle beam, that is, the vehicle beam structure limits the height of the upper surface of the battery pack installed below the vehicle beam.

[0007] The utility model solves the above technical problems through the following technical solutions:

[0008] The utility model provides an electric vehicle, comprising a longitudinal beam, wherein the longitudinal beam comprises a main body section and a mounting section connected to each other, a battery pack is suspended and mounted on the mounting section; the mounting section is bent upward relative to the main body section, or a lower surface of the mounting section has a receiving groove.

[0009] In this solution, the longitudinal beam is divided into a main section and an installation section. The main section can be arranged according to the original height of the longitudinal beam, and the installation section can be bent or provided with a receiving groove relative to the main section, so that when the battery pack is hung and installed at the installation section of the longitudinal beam, the upper surface height of the battery pack is not limited by the height of the main section.

[0010] Preferably, the bottom of the mounting section is higher than the bottom of the main body section, and the lower part of the mounting section is used to accommodate the battery pack. In this solution, the longitudinal beam is divided into a main body section and a mounting section that are connected to each other, the bottom of the mounting section is higher than the bottom of the main body section, and the lower part of the mounting section is used to accommodate the battery pack; in this arrangement, the height of the upper surface of the battery pack below the mounting section is not limited by the main body section, so that more battery packs can be installed at the bottom of the beam.

[0011] Preferably, the top of the mounting section and the top of the main body section are located in the same plane. In this solution, the top of the mounting section and the top of the main body section are located in the same plane. This arrangement allows a receiving groove to be formed at the longitudinal beam mounting section, which accommodates the battery pack and the upper surface height of the battery pack is not limited by the main body section, so that more battery packs can be installed at the bottom of the beam.

[0012] Preferably, the end surface of the main body segment and the bottom surface of the mounting segment form the accommodation groove for accommodating the battery pack.

[0013] Preferably, a locking position is provided on the longitudinal beam to install the battery pack, and the locking position is provided at the bottom of the installation section, the side of the installation section, or one end of the main body section close to the installation section, and the locking position is used to set a locking mechanism. In this solution, there are multiple installation positions of the locking position on the longitudinal beam, which is convenient for adaptive selection according to specific conditions such as the size of the longitudinal beam, the size of the battery pack, the installation position and arrangement direction of the battery pack, etc.

[0014] Preferably, the battery pack is locked and installed on the body section and / or the mounting section by a locking mechanism, wherein the locking mechanism comprises a lock base and a locking member that cooperate with each other; a plurality of the lock bases are arranged in sequence along the vertical direction at one end of the body section close to the mounting section, and the locking member is correspondingly arranged on the battery pack. This facilitates the installation of the locking mechanism using the body section.

[0015] Alternatively, a plurality of lock bases are arranged in sequence along the horizontal direction at the bottom of the installation section;

[0016] Alternatively, a plurality of lock bases are arranged in sequence along the horizontal direction or the vertical direction on the side of the mounting section; the locking mechanism in this embodiment includes a lock base, and a plurality of lock bases can be arranged in sequence along the horizontal direction or the vertical direction, so as to provide a variety of installation positions for the locking seat according to needs.

[0017] Preferably, the top of the mounting section is higher than the top of the main body section, and a connecting section is further provided between the mounting section and the main body section, and the mounting section and the connecting section form a receiving groove for accommodating the battery pack. In this solution, the top of the mounting section is higher than the top of the main body section, and the mounting section and the connecting section form a receiving groove for accommodating the battery pack; this arrangement facilitates the formation of a partially upwardly arched structure in the longitudinal beam, and can ensure the vertical thickness value of the mounting section when the receiving groove is formed.

[0018] Preferably, a locking position is provided on the longitudinal beam to install the battery pack, and the locking position is provided at the bottom of the mounting section, the side of the mounting section or the connecting section, and the locking position is used to set a locking mechanism. In this solution, the locking position can be provided at the bottom of the mounting section, the side of the mounting section or the connecting section respectively; the required locking position can be selected as needed.

[0019] Preferably, the battery pack is locked and installed on the connecting section and / or the mounting section by a locking mechanism, wherein the locking mechanism includes a locking base and a locking member, the connecting section is provided with a plurality of the locking bases sequentially arranged in the vertical direction, and the battery pack is correspondingly provided with the locking member. The locking mechanism in this solution includes a locking base, and the connecting section is provided with a plurality of the locking bases sequentially arranged in the vertical direction, so as to make full use of the vertical space of the connecting section.

[0020] Preferably, a connection point between the mounting section and the connecting section and / or a connection point between the connecting section and the main body section has a first reinforcement structure.

[0021] Preferably, the battery pack is locked to the longitudinal beam by one or more locking mechanisms selected from the group consisting of snap-on, hook-on, T-lock, bolt, or bead-type locking mechanisms. In this solution, there are multiple structural forms of the locking mechanism, which is convenient for adaptive selection according to specific conditions such as the size of the longitudinal beam, the size of the battery pack, the installation position and arrangement direction of the battery pack, etc.

[0022] Preferably, the locking mechanism has a locking position and an unlocking position, and the battery pack can move between the locking position and the unlocking position along the width direction of the vehicle or the length direction of the vehicle to lock or unlock relative to the longitudinal beam. In this solution, the locking mechanism has a locking position and an unlocking position, and the battery pack can move between the locking position and the unlocking position along the width direction of the vehicle or the length direction of the vehicle to lock or unlock relative to the longitudinal beam. This arrangement makes it easy to unlock the battery pack while the battery pack moves in a straight line.

[0023] Preferably, the battery pack includes a plurality of battery pack units arranged side by side along the width direction and / or the length direction of the vehicle, and each of the battery pack units is independently mounted on the longitudinal beam through a locking mechanism. In this solution, the battery packs are arranged side by side along the width direction and / or the length direction of the vehicle beam, and each of the battery pack units is independently mounted on the longitudinal beam through a locking mechanism; this arrangement facilitates reducing the size and weight of a single battery pack and facilitates manufacturing and disassembly.

[0024] Preferably, the thickness of the mounting section along the width of the vehicle is greater than that of the main body section, or a second reinforcement structure is provided in the thickness direction of the mounting section. In this solution, a second reinforcement structure is provided in the thickness direction of the mounting section, which facilitates structural reinforcement of the mounting section in the thickness direction of the mounting section.

[0025] Preferably, a third reinforcement structure is connected between the two longitudinal beams parallel to each other, and the third reinforcement structure is arranged at both ends of the installation section. In this solution, the third reinforcement structure is used to facilitate the structural reinforcement between the two longitudinal beams parallel to each other.

[0026] And / or, a battery pack bracket is provided at the installation section for installing the battery pack, and the battery pack bracket includes a connecting beam, and the connecting beam is located between the two parallel body segments and fixed to the body segments. In this solution, the connecting beam of the battery pack bracket is used, and the connecting beam is located between the two parallel body segments and fixed to the body segments; it is convenient for the battery pack bracket to achieve structural reinforcement between the body segments.

[0027] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the better solutions of the utility model.

[0028] The positive and progressive effects of the utility model are:

[0029] In the utility model, the longitudinal beam is divided into a main body section and a mounting section. The main body section can be arranged according to the original height of the longitudinal beam, and the mounting section can be bent or provided with a receiving groove relative to the main body section, so that when the battery pack is hung and installed at the mounting section of the longitudinal beam, the upper surface height of the battery pack is not affected by the main body section. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a front view of the electric vehicle in Example 1 of the utility model when the mounting section is arched upward relative to the main body section.

[0031] Figure 2 This is a schematic diagram of the structure of the longitudinal beam in Example 1 of the utility model.

[0032] Figure 3 It is a three-dimensional diagram of the installation section of the electric vehicle in Example 1 of the utility model when it is bent.

[0033] Figure 4 for Figure 3 A schematic diagram of the structure of part A in the middle;

[0034] Figure 5 This is a schematic diagram of the battery pack being connected to the mounting section via a locking structure in Embodiment 1 of the present utility model;

[0035] Figure 6 for Figure 5 A schematic diagram of the structure of part B in the middle;

[0036] Figure 7 This is a schematic diagram of setting a first reinforcement structure at the longitudinal beam in Embodiment 1 of the utility model;

[0037] Figure 8 This is a schematic diagram of another embodiment of the present invention in which the thickness of the installation section and the connection section is greater than that of the body section;

[0038] Fig. 9 This is a schematic diagram of installing a second reinforcement structure on both sides of the installation section in another embodiment of the utility model;

[0039] Fig.10 is a schematic diagram of a second reinforcement structure in another embodiment of the utility model;

[0040] Fig.11 It is a schematic diagram of a longitudinal beam having a receiving groove on the lower surface of the mounting section in Embodiment 2 of the present utility model;

[0041] Explanation of the accompanying drawings: 1. front of the vehicle; 2. first mounting section; 201. connecting section; 3. main body section; 4. reinforcing beam; 5. second mounting section; 6. accommodating groove; 7. lock base; 71. lock groove; 72. opening; 8. mounting bracket; 801. first side panel; 802. second side panel; 803. bottom panel; 804. partition; 9. battery pack frame; 10. battery pack; 11. lock shaft; 1101. vertical panel; 14. first reinforcing structure; 15. second reinforcing structure. DETAILED DESCRIPTION

[0042] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0043] Example 1

[0044] like Figure 1-Figure 10 As shown, this embodiment discloses an electric vehicle, including a front 1 and a body, the body including a longitudinal beam, the longitudinal beam including a main body section 3 and a mounting section (i.e., Figure 1 , Figure 2The first installation section 2 shown in the figure has a battery pack 10 suspended thereon; the installation section is bent upward relative to the body section 3. The longitudinal beam is divided into the body section 3 and the installation section. The body section 3 can be arranged according to the original height of the longitudinal beam, and the installation section can be bent relative to the body section, so that when the battery pack 10 is suspended thereon, the upper surface height of the battery pack 10 is not limited by the height of the body section 3.

[0045] The main body section 3 and the mounting section in this embodiment are only divisions of the longitudinal beam along the length direction. The main body section 3 and the mounting section 2 can be manufactured as a whole, or can be manufactured separately and then welded to form a whole. Relatively speaking, the main body section 3 occupies a larger proportion of the entire longitudinal beam length, and the mounting section 2 occupies a smaller proportion of the entire longitudinal beam length.

[0046] The structural form of the main body section and the mounting section is a straight beam. In other embodiments, in order to meet the requirements of chassis design, the main body section 3 and the mounting section can be a curved beam with a certain curvature.

[0047] like Figure 2 As shown, the bent mounting section is still parallel to the main body section. In some other structural forms, in order to enhance the bearing capacity at the mounting section, the mounting section is bent upward to form an arched structure with a smaller curvature. That is, in this embodiment, the mounting section only needs to be able to bend upward to avoid the battery pack to be installed, and the specific shape after the bending can be set by those skilled in the art according to needs.

[0048] See also Figure 2 The longitudinal beam includes a main body section 3 and a mounting section (hereinafter referred to as the first mounting section 2) connected to each other. The end surface of the main body section and the bottom surface of the mounting section form a receiving groove for placing the battery pack. The bottom of the first mounting section 2 is higher than the bottom of the main body section 3, and the top of the first mounting section 2 is higher than the top of the main body section 3. The bottom of the first mounting section 2 is used to accommodate the battery pack. A connecting section 201 is also included between the first mounting section 2 and the main body section 3. The first mounting section 2 and the connecting section 201 form a receiving groove for accommodating the battery pack. In this embodiment, when the bottom of the first mounting section 2 moves upward relative to the bottom of the main body section 3, the top of the first mounting section 2 also moves upward relative to the top of the main body section 3, and the first mounting section 2 after the upward movement is connected to the main body section 3 through the connecting section 201. This structure facilitates the formation of a partially upwardly arched structural form in the longitudinal beam, and can ensure the vertical thickness value of the first mounting section 2 when the receiving groove is formed, thereby improving the structural strength of the first mounting section 2.

[0049] In this embodiment, a locking position is set on the longitudinal beam to install the battery pack 10, and the locking position is set at the bottom of the first mounting section 2, the side of the first mounting section 2 or the connecting section 201; the required locking position can be selected as needed, so that the installation of the battery pack 10 can meet the needs under different working conditions. The locking position is used to set a locking mechanism, and the battery pack is connected and installed on the longitudinal beam through the locking mechanism. The locking mechanism can exist alone or in the form of multiple locking mechanisms arranged in columns or rows; for example, multiple locking mechanisms are provided in the horizontal direction at the bottom of the first mounting section 2. Similarly, a single or multiple locking mechanisms can also be provided on both sides (i.e., both ends) of the first mounting section 2 along the length direction of the longitudinal beam.

[0050] It is understandable that the above-mentioned longitudinal beam has a locking position, and the locking position has a locking structure. The locking mechanism here has various forms and is not limited. For example, the battery pack 10 is locked to the longitudinal beam by one or more locking mechanisms of a snap-on, hanging, T-lock, bolt or bead-type locking mechanism. For locking mechanisms of different structural forms, their structural settings and sizes are different. When this embodiment is applied to electric vehicles with different chassis, it can be selected according to the size of the longitudinal beam and the battery pack 10.

[0051] As one of the specific structural forms, the locking mechanism in this embodiment includes a lock base and a locking member that cooperate with each other, wherein the lock base is arranged on the longitudinal beam, and the locking member is arranged on the battery pack. The locking member can be a hanging member, a T-rod, a threaded column, or a snap-fit ​​member, and the lock base has a locking groove or a locking hole for the above-mentioned locking member to enter and lock.

[0052] The battery pack includes a plurality of battery pack units arranged side by side in the width direction of the vehicle, and each battery pack unit is independently mounted on the longitudinal beam through a locking mechanism. In other embodiments, the battery pack may also include a plurality of battery pack units arranged side by side in the length direction of the vehicle, or a plurality of battery pack units may be arranged side by side in both the width direction and the length direction of the vehicle.

[0053] When the battery pack 10 is suspended at the position of the first mounting section 2, the first mounting section 2, the connecting section 201 and the end of the main body section 3 adjacent to the connecting section are all arranged close to the battery pack 10. Therefore, in order to facilitate the locking of the battery pack 10, the battery pack 10 can be locked at the connecting section 201 or the first mounting section 2 and the end of the main body section 3 close to the mounting section.

[0054] Specifically, when the battery pack 10 is locked and installed on the connecting section 201 through the locking mechanism, the connecting section 201 is provided with a plurality of lock bases arranged in sequence along the vertical direction, and a locking member is correspondingly provided on the battery pack 10; so as to make full use of the vertical space of the connecting section 201. When the battery pack 10 is locked and installed on the first mounting section 2 through the locking mechanism, a plurality of the lock bases are arranged in sequence along the horizontal direction at the bottom of the first mounting section; or, a plurality of the lock bases are arranged in sequence along the horizontal direction or the vertical direction on the side of the first mounting section; and a locking member is correspondingly provided on the battery pack 10. When the battery pack 10 is locked and installed on one end of the main body section 3 close to the first mounting section 2 through the locking mechanism, a plurality of lock bases are arranged in sequence along the vertical direction at one end of the main body section 3 close to the first mounting section 2, and a locking member is correspondingly provided on the battery pack.

[0055] It should be pointed out that, when the above-mentioned locking mechanism includes a locking member and a lock base, the positions of the locking member and the lock base can be interchanged, that is, one of the lock base and the locking member is installed on the longitudinal beam, and the other is installed on the battery pack frame.

[0056] Specifically, for the longitudinal beam, it is not convenient to directly install the locking member or the lock base on its surface. In order to solve this problem, the locking mechanism is installed by using a mounting bracket in this embodiment. Figure 3-Figure 6 As shown, a schematic diagram of a lock base arranged at the first mounting section 2 is given, wherein a plurality of lock bases are arranged in sequence along the length direction of the first mounting section 2; in order to facilitate the installation of a plurality of lock bases 7 on the outside of the first mounting section 2, a mounting bracket 8 extending along the length direction of the electric vehicle is fixed on the outside of the first mounting section 2, and the mounting bracket 8 has mounting openings arranged in a row along the length direction of the electric vehicle, and corresponding lock bases 8 are fixed in the mounting openings; the battery pack 10 includes an external battery pack frame, on which a row of lock shafts 11 extending along the length direction of the battery pack and adapted to the lock bases are installed, and the lock shafts 11 here serve as locking members.

[0057] The mounting bracket includes a first side plate 801 and a second side plate 802, the lower ends of which are connected via a bottom plate 803, wherein the first side plate 801 is fixedly attached to the side wall of the first mounting section 2, and the second side plate 802 is arranged at one end of the bottom plate away from the first mounting section 2, a plurality of partitions 804 are fixedly connected between the two side plates, and a separation space is formed between adjacent partitions 804, and the bottom plate 803 forms an above-mentioned mounting opening at each separation space, and a lock base with an opening facing downward is installed at the mounting opening. Accordingly, in order to realize the installation of the lock shaft, as shown in FIG. Figure 6As shown, a vertical plate assembly is provided along the length direction of the vehicle at the battery pack frame 9, each vertical plate assembly includes two vertical plates 1101, a lock shaft installation space is formed between the two vertical plates, and the above-mentioned lock shaft 11 is fixed between the two vertical plates. When in use, the lock base can be inserted into the space between the two vertical plates so that the lock shaft 11 enters the lock base.

[0058] When the positions of the lock base and the lock shaft are interchanged, a vertical downward vertical plate assembly is installed at the installation opening, and a lock shaft is set between the two vertical plates 1101 of the vertical plate assembly; the above-mentioned lock base can be installed on the upper end surface of the battery pack frame.

[0059] The lock mechanism has a lock position and an unlock position, and the battery pack 10 can be moved in the vehicle width direction or the vehicle length direction between the lock position and the unlock position to be locked or unlocked relative to the side member.

[0060] Specifically, when the battery pack is in the locked position, the battery pack is locked to the longitudinal beam; when the battery pack is in the unlocked position, the battery pack can be detached from the longitudinal beam. Figure 6 It can be seen that the lower end of the lock base has an opening 72 for accommodating the insertion of the lock shaft, and a lock groove 71 is provided in the lock base. After the lock shaft is inserted into the lock groove 71 upward from the opening 72, it can slide along the lock groove 71. When the lock shaft slides to the end of the lock groove 71 away from the opening 72, it is locked by the lock tongue in the lock base. At this time, the lock shaft is in the locked position in the lock base. When the lock tongue is driven by the unlocking mechanism to open the lock groove channel, the lock shaft can slide in the horizontal direction to the end of the lock groove close to the opening 72. At this time, the lock shaft is in the unlocking position, and the lock shaft can leave the lock groove from this position in the vertical direction through the opening 72 and then disengage from the locking mechanism.

[0061] Combined with the above-mentioned locking position and unlocking position, Figure 6 The end of the lock slot 71 away from the opening 72 is the unlocking position, and the end of the lock slot 71 close to the opening 72 is the locking position, and the opening 72 is at the lower end of the lock base; when in use, the lock shaft enters or leaves the lock slot 71 from the opening 72 by lifting, and the horizontal translation of the lock shaft can drive the lock shaft to move between the locking position and the unlocking position.

[0062] In this embodiment, a battery pack can be installed below the first mounting section 2. The battery pack can be directly below the first mounting section 2 or diagonally below the first mounting section (i.e., there is also a battery pack part outside the area defined by the vertical projections of the two first mounting sections).

[0063] When the battery pack at the first installation section is an integral structure, the upper surface of the entire battery pack is not higher than the lower bottom surface of the first installation section 2 or the top part of the battery pack is higher than the lower surface of the first installation section 2, that is, the top of the battery pack has relative convex and concave structures to match the connection of the longitudinal beam; when the battery pack at the first installation section is a split structure, a battery pack can be suspended and installed directly below the first installation section. Another battery pack is suspended on both sides of the first installation section 2, and the top surface of the battery pack suspended on both sides of the first installation section 2 can be higher than the bottom surface height of the first installation section 2, thereby increasing the maximum thickness of the battery pack suspended on both sides of the first installation section 2 while keeping the position and size of the first installation section 2 and the ground clearance of the battery pack unchanged.

[0064] In this embodiment, an electrical connector adapted to the battery pack is provided at the longitudinal beam, and the battery pack has an electrical connection terminal, which is located at the side of the battery pack. In the case of the locking position and the unlocking position mentioned in the above technical solution, when the battery pack moves to the locking position of the locking mechanism, the electrical connection terminal of the battery pack is plugged into the electrical connector at the longitudinal beam; when the battery pack moves to the unlocking position of the locking mechanism, the electrical connection terminal is detached from the electrical connector, thereby not affecting the vertical lifting and lowering of the battery pack.

[0065] When the battery pack adopts a split structure, an electrical connector adapted to the number of battery pack units is provided at the longitudinal beam, and each battery pack unit has an electrical connection connector.

[0066] It can be understood that when the first mounting section 2 is adopted in the present embodiment, a corner of a set angle (for example, 90 degrees) is formed between the first mounting section 2, the connecting section 201 and the main body section 3. According to mechanical analysis, stress concentration is likely to occur at the connection between the first mounting section, the connecting section and the main body section, thereby making it easy for the longitudinal beam to be damaged by excessive force or fatigue damage at the mounting section.

[0067] In this embodiment, the following various forms of reinforcement structures are provided to enhance the structural strength at the first installation section.

[0068] In one specific structural strengthening method, such as Figure 8 As shown, the thickness of the first mounting section 2 along the width of the vehicle is greater than that of the body section 3, or, as shown in FIG. Fig. 9 and Fig.10 As shown, a second reinforcement structure 15 is provided in the thickness direction of the first mounting section 2. This facilitates the structural reinforcement of the first mounting section 2 in the thickness direction of the first mounting section 2. Specifically, the second reinforcement structure 15 in this embodiment is a reinforcement plate, and the shape and size of the reinforcement plate are the same as those of the first mounting section 2 and the connecting section at the first mounting section 2; and both ends of the reinforcement plate extend to cover the main body section and are fixed to the main body section.

[0069] The second reinforcement structure here is fixed to the first installation section and the main body section by welding or bolt connection.

[0070] In another specific structural strengthening method, such as Figure 7 As shown, the connection between the first installation section 2 and the connection section 201 and / or the connection between the connection section 201 and the body section 3 has a first reinforcement structure 14, which facilitates structural reinforcement at the connection section 201 and the body section 3.

[0071] Specifically, the first reinforcement structure 14 here may be a reinforcement plate or a reinforcement rod, and the reinforcement plate is fixedly connected to the first installation section, the main body section or the connection section by welding or bolt connection.

[0072] In another specific structural reinforcement method, a third reinforcement structure is connected between two parallel longitudinal beams, and the third reinforcement structure is arranged at both ends of the first installation section 2. This facilitates the structural reinforcement between the two parallel longitudinal beams. Figure 3 As shown, the third reinforcement structure may be a reinforcement beam, that is, a reinforcement beam 4 installed between two longitudinal beams.

[0073] In another specific structural reinforcement method, a battery pack bracket is fixedly provided at the first mounting section 2 for mounting the battery pack 10. The battery pack bracket includes a connecting beam, which is located between two parallel main body sections 3 and fixed to the main body sections 3, so as to facilitate the battery pack bracket to achieve structural reinforcement between the main body sections 3.

[0074] Example 2

[0075] like Fig.11 As shown, this embodiment is basically the same as Embodiment 1, and also provides an electric vehicle, including a longitudinal beam, the longitudinal beam including a main body section 3 and a mounting section connected to each other, the bottom of the mounting section is higher than the bottom of the main body section 3, and the difference from Embodiment 1 is that: the top of the mounting section in this embodiment is located in the same plane as the top of the main body section 3, and the bottom of the mounting section is used to accommodate the battery pack 10; the top of the mounting section is located in the same plane as the top of the main body section 3.

[0076] When the bottom of the mounting section is higher than the bottom of the body section 3, and the top of the mounting section is in the same plane as the top of the body section 3, a receiving groove 6 is enclosed on the lower surface of the longitudinal beam. At this time, the receiving groove 6 formed by the longitudinal beam structure in this embodiment is similar to the receiving groove structure formed in Embodiment 1. The battery pack 10 is accommodated in the receiving groove 6, and the height of the upper surface of the battery pack 10 is not limited by the body section 3, so that more battery packs 10 can be installed at the bottom of the beam.

[0077] Specifically, refer to Fig.11 At this time, the installation section is the second installation section 5, and both ends of the second installation section 5 are respectively connected to the main body section 3.

[0078] Similarly, in order to install the battery pack 10 on the longitudinal beam, in this embodiment, a locking position is set on the longitudinal beam to install the battery pack 10, and the locking position is set at the bottom of the second installation section 5, the side of the second installation section 5, or one end of the main body section 3 close to the installation section. There are multiple installation positions of the locking position on the longitudinal beam, which is convenient for adaptive selection according to specific conditions such as the size of the longitudinal beam, the size of the battery pack 10, the installation position and arrangement direction of the battery pack 10. For the specific settings of the locking position and the unlocking position, please refer to Example 1, which will not be repeated here.

[0079] In this embodiment, the battery pack 10 can be locked to the longitudinal beam by one or more locking mechanisms such as snap-on, hanging, T-lock, bolt or bead-type locking mechanisms. The locking mechanism has various structural forms, which are convenient for selection according to the size of the longitudinal beam and the battery pack 10. Specifically, when the battery pack 10 is locked and installed on the main body section 3 by the locking mechanism, the locking mechanism includes a lock base and a locking member that cooperate with each other; a plurality of lock bases are arranged in sequence along the vertical direction at one end of the main body section 3 close to the second mounting section 5, and a corresponding locking member is provided on the battery pack 10.

[0080] When the battery pack 10 is locked and installed on the second installation section 5 through the locking mechanism, the locking mechanism includes a lock base and a locking member that cooperate with each other; a plurality of lock bases are arranged in sequence along the horizontal direction at the bottom of the second installation section 5; or a plurality of lock bases are arranged in sequence along the horizontal direction or the vertical direction on the side of the second installation section 5; and a locking member is correspondingly provided on the battery pack 10. For the specific structural arrangement of the locking mechanism, the specific structure and installation method of the lock base and the lock shaft, please refer to Example 1, and no further description is given here.

[0081] When the locking mechanism includes a locking shaft and a locking base, a plurality of locking bases can be arranged in sequence along a horizontal direction or a vertical direction, so as to provide various installation positions for the locking seat according to needs.

[0082] Similarly, the longitudinal beam in this embodiment may have a problem of weakened structural strength due to the arrangement of the receiving groove. For the structural reinforcement of the longitudinal beam at the second installation section 5 and the receiving groove, reference may be made to the relevant structural arrangement in Embodiment 1, which will not be repeated here.

[0083] On the basis of conforming to the common sense in the art, the preferred conditions in the above-mentioned Embodiment 1 and Embodiment 2 can be arbitrarily combined to obtain the preferred solutions of the present utility model.

[0084] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. An electric vehicle, characterized in that: It comprises a longitudinal beam, which comprises a main body section and a mounting section connected to each other, and a battery pack is suspended and mounted at the mounting section; the mounting section is bent upward relative to the main body section, or the lower surface of the mounting section has a receiving groove.

2. The electric vehicle according to claim 1, characterized in that: The bottom of the mounting section is higher than the bottom of the body section, and the bottom of the mounting section is used to accommodate a battery pack.

3. The electric vehicle according to claim 2, characterized in that: The top of the mounting section and the top of the body section are located in the same plane.

4. The electric vehicle according to claim 3, characterized in that: The end surface of the main body section and the bottom surface of the mounting section form the accommodating groove for accommodating the battery pack.

5. The electric vehicle according to claim 2, characterized in that: A locking position is provided on the longitudinal beam to install the battery pack, and the locking position is provided at the bottom of the installation section, the side of the installation section or an end of the main body section close to the installation section, and the locking position is used to set a locking mechanism.

6. The electric vehicle according to claim 5, characterized in that: The battery pack is locked and installed on the body section and / or the mounting section by a locking mechanism, wherein the locking mechanism comprises a lock base and a locking member that cooperate with each other; a plurality of the lock bases are arranged in sequence along the vertical direction at one end of the body section close to the mounting section, and the locking member is correspondingly provided on the battery pack; Alternatively, a plurality of lock bases are arranged in sequence along the horizontal direction at the bottom of the installation section; Alternatively, a plurality of the lock bases are sequentially arranged on the side of the installation section along a horizontal direction or a vertical direction.

7. The electric vehicle according to claim 2, characterized in that: The top of the mounting section is higher than the top of the main body section. A connecting section is further provided between the mounting section and the main body section. The mounting section and the connecting section form a receiving groove for accommodating a battery pack.

8. The electric vehicle according to claim 7, characterized in that: A locking position is provided on the longitudinal beam to install the battery pack, and the locking position is provided at the bottom of the installation section, the side of the installation section or the connecting section, and the locking position is used to set a locking mechanism.

9. The electric vehicle according to claim 8, characterized in that: The battery pack is locked and installed on the connecting section and / or the mounting section by a locking mechanism, wherein the locking mechanism includes a lock base and a locking member, the connecting section is provided with a plurality of the lock bases arranged in sequence along a vertical direction, and the battery pack is correspondingly provided with the locking member.

10. The electric vehicle according to claim 8, characterized in that: A connection point between the installation section and the connection section and / or a connection point between the connection section and the body section has a first reinforcement structure.

11. The electric vehicle according to claim 1, characterized in that: The battery pack is locked to the longitudinal beam by one or more locking mechanisms selected from the group consisting of a snap-on, hanging, T-lock, bolt, or bead-type locking mechanism.

12. The electric vehicle according to claim 5 or 9, characterized in that: The locking mechanism has a locking position and an unlocking position, and the battery pack is movable in the vehicle width direction or the vehicle length direction between the locking position and the unlocking position to be locked or unlocked relative to the side member.

13. The electric vehicle according to claim 1, characterized in that: The battery pack includes a plurality of battery pack units arranged side by side along a width direction and / or a length direction of the vehicle, and each of the battery pack units is independently mounted on the longitudinal beam through a locking mechanism.

14. The electric vehicle according to claim 1, characterized in that: The thickness of the mounting section along the vehicle width direction is greater than that of the body section, or a second reinforcement structure is provided along the thickness direction of the mounting section.

15. The electric vehicle according to claim 1, characterized in that: A third reinforcement structure is connected between the two parallel longitudinal beams, and the third reinforcement structure is arranged at both ends of the installation segment; and / or a battery pack bracket is provided at the installation segment for installing the battery pack, and the battery pack bracket includes a connecting beam, which is located between the two parallel main body segments and fixed to the main body segments.

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